[1] | 1 | #include "config_xor.h"
|
---|
| 2 |
|
---|
[196] | 3 | #if defined(HAVE_POSIX_FADVISE) && defined(HAVE_MINCORE)
|
---|
| 4 | #define _XOPEN_SOURCE 600
|
---|
| 5 | #define _BSD_SOURCE
|
---|
| 6 | #endif
|
---|
[1] | 7 |
|
---|
| 8 | #include <stdio.h>
|
---|
| 9 | #include <stdlib.h>
|
---|
| 10 | #include <stdarg.h>
|
---|
| 11 | #include <string.h>
|
---|
[20] | 12 | #include <limits.h>
|
---|
[34] | 13 | #ifdef HAVE_STDINT_H
|
---|
| 14 | /* for SIZE_MAX */
|
---|
| 15 | #include <stdint.h>
|
---|
| 16 | #endif
|
---|
[1] | 17 |
|
---|
[279] | 18 | #include <sys/types.h>
|
---|
| 19 | #include <sys/stat.h>
|
---|
[1] | 20 | #include <unistd.h>
|
---|
| 21 | #include <fcntl.h>
|
---|
| 22 | #include <signal.h>
|
---|
| 23 |
|
---|
[196] | 24 | #if defined(HAVE_POSIX_FADVISE) && defined(HAVE_MINCORE)
|
---|
| 25 | #include <sys/mman.h>
|
---|
| 26 | #endif
|
---|
| 27 |
|
---|
[1] | 28 | #if TIME_WITH_SYS_TIME
|
---|
| 29 | #include <sys/time.h>
|
---|
| 30 | #include <time.h>
|
---|
| 31 | #else
|
---|
| 32 | #if HAVE_SYS_TIME_H
|
---|
| 33 | #include <sys/time.h>
|
---|
| 34 | #else
|
---|
| 35 | #include <time.h>
|
---|
| 36 | #endif
|
---|
| 37 | #endif
|
---|
| 38 |
|
---|
| 39 | #ifdef HAVE_MEMORY_H
|
---|
| 40 | #include <memory.h>
|
---|
| 41 | #endif
|
---|
| 42 | #ifdef HAVE_SYS_SELECT_H
|
---|
| 43 | #include <sys/select.h>
|
---|
| 44 | #endif
|
---|
| 45 |
|
---|
| 46 | #ifndef FD_SET
|
---|
| 47 | #define NFDBITS 32
|
---|
| 48 | #define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
|
---|
| 49 | #define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
|
---|
| 50 | #define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
|
---|
| 51 | #endif /* !FD_SET */
|
---|
| 52 | #ifndef FD_SETSIZE
|
---|
| 53 | #define FD_SETSIZE 32
|
---|
| 54 | #endif
|
---|
| 55 | #ifndef FD_ZERO
|
---|
| 56 | #define FD_ZERO(p) memset((char *)(p), '\0', sizeof(*(p)))
|
---|
| 57 | #endif
|
---|
| 58 |
|
---|
[76] | 59 | #define SH_REAL_SET
|
---|
| 60 |
|
---|
[1] | 61 | #include "slib.h"
|
---|
| 62 | #include "sh_calls.h"
|
---|
| 63 | #define SH_NEED_PWD_GRP 1
|
---|
| 64 | #include "sh_static.h"
|
---|
[144] | 65 | #include "sh_pthread.h"
|
---|
[167] | 66 | #include "sh_string.h"
|
---|
[1] | 67 |
|
---|
| 68 | #undef FIL__
|
---|
| 69 | #define FIL__ _("slib.c")
|
---|
| 70 |
|
---|
| 71 | const uid_t sh_uid_neg = ((uid_t) -1);
|
---|
| 72 | const gid_t sh_gid_neg = ((gid_t) -1);
|
---|
| 73 |
|
---|
| 74 | #undef BREAKEXIT
|
---|
| 75 | #if defined(SCREW_IT_UP) && defined(__linux__) && defined(__i386__)
|
---|
| 76 |
|
---|
| 77 | #ifdef SH_DEBUG
|
---|
| 78 | #define BREAKEXIT(expr) \
|
---|
| 79 | do { \
|
---|
| 80 | int ixi; \
|
---|
| 81 | for (ixi = 0; ixi < 8; ++ixi) { \
|
---|
| 82 | if ((*(volatile unsigned *)((unsigned) expr + ixi) & 0xff) == 0xcc) \
|
---|
| 83 | { dlog(0, FIL__, __LINE__, _("BREAKEXIT")); _exit(EXIT_FAILURE); } \
|
---|
| 84 | } \
|
---|
| 85 | } \
|
---|
| 86 | while (1 == 0)
|
---|
| 87 | #else
|
---|
| 88 | #define BREAKEXIT(expr) \
|
---|
| 89 | do { \
|
---|
| 90 | int ixi; \
|
---|
| 91 | for (ixi = 0; ixi < 8; ++ixi) { \
|
---|
| 92 | if ((*(volatile unsigned *)((unsigned) expr + ixi) & 0xff) == 0xcc) \
|
---|
| 93 | _exit(EXIT_FAILURE); \
|
---|
| 94 | } \
|
---|
| 95 | } \
|
---|
| 96 | while (1 == 0)
|
---|
| 97 | #endif
|
---|
| 98 |
|
---|
| 99 | #else
|
---|
| 100 | #define BREAKEXIT(expr)
|
---|
| 101 | #endif
|
---|
| 102 |
|
---|
| 103 | /****************************************************************
|
---|
| 104 | *
|
---|
| 105 | * The debug/trace subsystem
|
---|
| 106 | *
|
---|
| 107 | ****************************************************************/
|
---|
| 108 |
|
---|
| 109 | int slib_do_trace = 0;
|
---|
| 110 | int slib_trace_fd = -1;
|
---|
| 111 |
|
---|
| 112 | static char trace_log[256] = { '\0' };
|
---|
| 113 | static int trace_level = 0;
|
---|
| 114 | static FILE * trace_fp = NULL;
|
---|
| 115 |
|
---|
[20] | 116 | int sl_trace_use (const char * dummy)
|
---|
[1] | 117 | {
|
---|
[169] | 118 | (void) dummy;
|
---|
| 119 | slib_do_trace = 1;
|
---|
[1] | 120 | return 0;
|
---|
| 121 | }
|
---|
| 122 |
|
---|
[20] | 123 | int sl_trace_file (const char * str)
|
---|
[1] | 124 | {
|
---|
| 125 | if (!str)
|
---|
| 126 | return -1;
|
---|
| 127 | if (str[0] != '/')
|
---|
| 128 | return -1;
|
---|
| 129 | sl_strlcpy(trace_log, str, 256);
|
---|
| 130 | return 0;
|
---|
| 131 | }
|
---|
| 132 |
|
---|
[170] | 133 | FILE * sl_tracefile_open(const char * file, const char * mode)
|
---|
[1] | 134 | {
|
---|
| 135 | FILE * xp = NULL;
|
---|
| 136 | slib_trace_fd = open(file, O_WRONLY|O_CREAT|O_APPEND, 0600);
|
---|
| 137 | if (slib_trace_fd >= 0)
|
---|
| 138 | xp = fdopen(slib_trace_fd, mode);
|
---|
| 139 | return xp;
|
---|
| 140 | }
|
---|
| 141 |
|
---|
[170] | 142 | void sl_trace_in(const char * str, const char * file, int line)
|
---|
[1] | 143 | {
|
---|
| 144 | int i;
|
---|
| 145 | if (trace_log[0] == '\0')
|
---|
| 146 | {
|
---|
| 147 | fprintf(stderr, "++ ");
|
---|
| 148 | for (i = 0; i < trace_level; ++i)
|
---|
| 149 | fprintf(stderr, ". ");
|
---|
| 150 | fprintf(stderr, "[%2d] %s \t - File %c%s%c at line %d\n",
|
---|
| 151 | trace_level, str, 0x22, file, 0x22, line);
|
---|
| 152 | }
|
---|
| 153 | else if (!sl_is_suid())
|
---|
| 154 | {
|
---|
| 155 | if (!trace_fp)
|
---|
| 156 | trace_fp = sl_tracefile_open(trace_log, "a");
|
---|
| 157 | if (trace_fp)
|
---|
| 158 | {
|
---|
| 159 | fprintf(trace_fp, "++ ");
|
---|
| 160 | for (i = 0; i < trace_level; ++i)
|
---|
| 161 | fprintf(trace_fp, ". ");
|
---|
| 162 | fprintf(trace_fp, "[%2d] %s \t - File %c%s%c at line %d\n",
|
---|
| 163 | trace_level, str, 0x22, file, 0x22, line);
|
---|
[169] | 164 | fflush(trace_fp);
|
---|
[1] | 165 | }
|
---|
| 166 | else
|
---|
| 167 | {
|
---|
| 168 | perror(_("sl_trace_in: fopen"));
|
---|
| 169 | _exit(1);
|
---|
| 170 | }
|
---|
| 171 | }
|
---|
| 172 | ++trace_level;
|
---|
| 173 | }
|
---|
| 174 |
|
---|
[170] | 175 | void sl_trace_out(const char * str, const char * file, int line)
|
---|
[1] | 176 | {
|
---|
| 177 | int i;
|
---|
| 178 |
|
---|
| 179 | --trace_level; if (trace_level < 0) trace_level = 0;
|
---|
| 180 |
|
---|
| 181 | if (trace_log[0] == '\0')
|
---|
| 182 | {
|
---|
| 183 | fprintf(stderr, "-- ");
|
---|
| 184 | for (i = 0; i < trace_level; ++i)
|
---|
| 185 | fprintf(stderr, ". ");
|
---|
| 186 | fprintf(stderr, _("[%2d] %s \t - File %c%s%c at line %d\n"),
|
---|
| 187 | trace_level, str, 0x22, file, 0x22, line);
|
---|
| 188 | }
|
---|
| 189 | else if (!sl_is_suid())
|
---|
| 190 | {
|
---|
| 191 | if (!trace_fp)
|
---|
| 192 | trace_fp = sl_tracefile_open(trace_log, "a");
|
---|
| 193 | if (trace_fp)
|
---|
| 194 | {
|
---|
| 195 | fprintf(trace_fp, "-- ");
|
---|
| 196 | for (i = 0; i < trace_level; ++i)
|
---|
| 197 | fprintf(trace_fp, ". ");
|
---|
| 198 | fprintf(trace_fp, _("[%2d] %s \t - File %c%s%c at line %d\n"),
|
---|
| 199 | trace_level, str, 0x22, file, 0x22, line);
|
---|
[169] | 200 | fflush(trace_fp);
|
---|
[1] | 201 | }
|
---|
| 202 | else
|
---|
| 203 | {
|
---|
| 204 | perror(_("sl_trace_out: fopen"));
|
---|
| 205 | _exit(1);
|
---|
| 206 | }
|
---|
| 207 | }
|
---|
| 208 | }
|
---|
| 209 |
|
---|
[170] | 210 | extern int sh_log_console (const char * msg);
|
---|
[1] | 211 |
|
---|
| 212 | static int dlogActive = 0;
|
---|
| 213 |
|
---|
| 214 | /* this is called from sh_error_setprint()
|
---|
| 215 | */
|
---|
| 216 | void dlog_set_active(int flag)
|
---|
| 217 | {
|
---|
| 218 | dlogActive = flag;
|
---|
| 219 | }
|
---|
| 220 |
|
---|
| 221 | /* flag = 0 debug messages
|
---|
| 222 | * = 1 descriptive error messages
|
---|
| 223 | * = 3 backtrace
|
---|
| 224 | */
|
---|
[170] | 225 | int dlog (int flag, const char * file, int line, const char *fmt, ...)
|
---|
[1] | 226 | {
|
---|
| 227 | va_list ap;
|
---|
| 228 | char val[81];
|
---|
| 229 | char msg[512];
|
---|
| 230 | char tmp[512];
|
---|
| 231 | int retval = 0;
|
---|
| 232 | int i;
|
---|
| 233 |
|
---|
| 234 | #ifdef SH_STEALTH
|
---|
| 235 | /*
|
---|
| 236 | * do not even print descriptive failure messages in stealth mode
|
---|
| 237 | */
|
---|
| 238 | if (dlogActive == 0)
|
---|
| 239 | return 0;
|
---|
| 240 | if (dlogActive == 1 && flag == 0) /* debug requires debug level */
|
---|
| 241 | return 0;
|
---|
| 242 | #else
|
---|
| 243 | if (dlogActive <= 1 && flag == 0) /* debug requires debug level */
|
---|
| 244 | return 0;
|
---|
| 245 | #endif
|
---|
| 246 |
|
---|
| 247 | if (flag == 1)
|
---|
| 248 | {
|
---|
[22] | 249 | sl_snprintf (val, 81, _("\n--------- %10s "), file);
|
---|
[1] | 250 | sl_strlcpy (msg, val, 80);
|
---|
[22] | 251 | sl_snprintf (val, 81, _(" --- %6d ---------\n"), line);
|
---|
[1] | 252 | sl_strlcat (msg, val, 80);
|
---|
| 253 | sh_log_console (msg);
|
---|
| 254 | }
|
---|
| 255 |
|
---|
| 256 | va_start (ap, fmt);
|
---|
| 257 | if (flag == 1)
|
---|
| 258 | sl_strlcpy(tmp, fmt, 512);
|
---|
| 259 | else
|
---|
| 260 | sl_strlcpy(tmp, fmt, 256);
|
---|
[279] | 261 | retval = strlen(tmp);
|
---|
[1] | 262 | if (retval > 0 && tmp[retval-1] == '\n')
|
---|
| 263 | tmp[retval-1] = '\0';
|
---|
| 264 | retval = 0;
|
---|
| 265 | if (flag == 1)
|
---|
| 266 | {
|
---|
| 267 | sl_vsnprintf (msg, 511, tmp, ap);
|
---|
| 268 | }
|
---|
| 269 | else
|
---|
| 270 | {
|
---|
| 271 | sl_strlcpy (msg, "## ", 256);
|
---|
| 272 | for (i = 0; i < trace_level; ++i)
|
---|
| 273 | sl_strlcat (msg, ". ", 256);
|
---|
| 274 | sprintf (val, _("[%2d] "), trace_level);
|
---|
| 275 | sl_strlcat (msg, val, 256);
|
---|
[279] | 276 | sl_vsnprintf (&msg[strlen(msg)], 255, tmp, ap);
|
---|
[1] | 277 | sl_snprintf (tmp, 255, _(" \t - File %c%s%c at line %d"),
|
---|
| 278 | 0x22, file, 0x22, line);
|
---|
| 279 | sl_strlcat (msg, tmp, 512);
|
---|
| 280 | }
|
---|
| 281 | va_end (ap);
|
---|
| 282 | if (flag != 0 || sl_is_suid())
|
---|
| 283 | retval = sh_log_console (msg);
|
---|
| 284 | else
|
---|
| 285 | {
|
---|
| 286 | if (trace_log[0] == '\0')
|
---|
| 287 | {
|
---|
| 288 | /* sh_log_console (msg); */
|
---|
| 289 | fprintf(stderr, "%s\n", msg);
|
---|
| 290 | }
|
---|
| 291 | else
|
---|
| 292 | {
|
---|
| 293 | if (!trace_fp)
|
---|
| 294 | trace_fp = sl_tracefile_open(trace_log, "a");
|
---|
| 295 | if (trace_fp)
|
---|
| 296 | {
|
---|
| 297 | fprintf(trace_fp, "%s\n", msg);
|
---|
| 298 | }
|
---|
| 299 | else
|
---|
| 300 | {
|
---|
| 301 | perror(_("dlog: fopen"));
|
---|
| 302 | _exit(1);
|
---|
| 303 | }
|
---|
| 304 | }
|
---|
| 305 | }
|
---|
| 306 | if (flag == 1)
|
---|
| 307 | sh_log_console (_("\n----------------------------------------------\n"));
|
---|
| 308 | return retval;
|
---|
| 309 | }
|
---|
| 310 |
|
---|
| 311 | extern char aud_err_message[64];
|
---|
| 312 | static char alt_err_message[64];
|
---|
| 313 | char * sl_get_errmsg()
|
---|
| 314 | {
|
---|
| 315 | if (aud_err_message[0] == '\0')
|
---|
| 316 | {
|
---|
| 317 | sl_strlcpy(alt_err_message, sl_error_string(sl_errno), 64);
|
---|
| 318 | return &alt_err_message[0];
|
---|
| 319 | }
|
---|
| 320 | return &aud_err_message[0];
|
---|
| 321 | }
|
---|
| 322 |
|
---|
| 323 |
|
---|
| 324 | #if defined(SL_DEBUG)
|
---|
| 325 | #define SL_MAX_MYSTACK 128
|
---|
| 326 |
|
---|
| 327 | static char sl_mystack[SL_MAX_MYSTACK][32];
|
---|
| 328 | static int sl_mystack_count = 0;
|
---|
| 329 |
|
---|
| 330 | void sl_stack_push(char * c, char * file, int line )
|
---|
| 331 | {
|
---|
| 332 | if (slib_do_trace)
|
---|
| 333 | sl_trace_in(c, file, line);
|
---|
| 334 | if (c && sl_mystack_count < SL_MAX_MYSTACK)
|
---|
| 335 | {
|
---|
| 336 | strncpy(sl_mystack[sl_mystack_count], c, 31);
|
---|
| 337 | sl_mystack[sl_mystack_count][31] = '\0';
|
---|
| 338 | ++sl_mystack_count;
|
---|
| 339 | /*
|
---|
| 340 | fprintf(stderr, "#%03d %s\n", sl_mystack_count,
|
---|
| 341 | sl_mystack[sl_mystack_count-1]);
|
---|
| 342 | */
|
---|
| 343 | }
|
---|
| 344 | return;
|
---|
| 345 | }
|
---|
| 346 |
|
---|
| 347 | void sl_stack_pop(char * c, char * file, int line)
|
---|
| 348 | {
|
---|
| 349 | if (slib_do_trace)
|
---|
| 350 | sl_trace_out(c, file, line);
|
---|
| 351 | if (sl_mystack_count > 0)
|
---|
| 352 | {
|
---|
| 353 | /*
|
---|
| 354 | fprintf(stderr, " <- #%03d %s\n", sl_mystack_count,
|
---|
| 355 | sl_mystack[sl_mystack_count-1]);
|
---|
| 356 | */
|
---|
| 357 | --sl_mystack_count;
|
---|
| 358 | }
|
---|
| 359 | return;
|
---|
| 360 | }
|
---|
| 361 |
|
---|
| 362 | void sl_stack_print()
|
---|
| 363 | {
|
---|
| 364 | int i;
|
---|
| 365 | /* FILE * dfile; */
|
---|
| 366 |
|
---|
| 367 | if (sl_mystack_count > 0)
|
---|
| 368 | {
|
---|
| 369 | sh_log_console(_("\nBacktrace:\n"));
|
---|
| 370 | /* dlog(3, FIL__, __LINE__, _("\nBacktrace:\n")); */
|
---|
| 371 | for (i = 0; i < sl_mystack_count; ++i)
|
---|
| 372 | sh_log_console(sl_mystack[i]);
|
---|
| 373 | /* dlog(3, FIL__, __LINE__, _("#%03d %s\n"), i, sl_mystack[i]); */
|
---|
| 374 | }
|
---|
| 375 | return;
|
---|
| 376 | }
|
---|
| 377 |
|
---|
| 378 | #endif
|
---|
| 379 |
|
---|
| 380 |
|
---|
| 381 | /*
|
---|
| 382 | * The global errno.
|
---|
| 383 | * On error, this is set to the return value of the function.
|
---|
| 384 | */
|
---|
| 385 | long int sl_errno;
|
---|
| 386 |
|
---|
| 387 |
|
---|
| 388 | /* ----------------------------------------------------------------
|
---|
| 389 | *
|
---|
| 390 | * Capability routines
|
---|
| 391 | *
|
---|
| 392 | * ---------------------------------------------------------------- */
|
---|
| 393 |
|
---|
| 394 | int sl_useCaps = 0;
|
---|
| 395 |
|
---|
| 396 | #ifdef FANCY_LIBCAP
|
---|
| 397 | #include <sys/capability.h>
|
---|
| 398 |
|
---|
| 399 | /*
|
---|
| 400 | * While these routines are tested and work, we don't use POSIX
|
---|
| 401 | * capabilities, as they don't seem to be useful (root can write
|
---|
| 402 | * to root-owned files anyway). Things would be more interesting
|
---|
| 403 | * if we could switch to a non-root UID with just a few capabilities
|
---|
| 404 | * enabled.
|
---|
| 405 | */
|
---|
| 406 | int sl_drop_cap ()
|
---|
| 407 | {
|
---|
| 408 | int error;
|
---|
| 409 | cap_t caps;
|
---|
| 410 | cap_flag_t capflag;
|
---|
| 411 | cap_flag_value_t capfval = CAP_CLEAR;
|
---|
| 412 | cap_value_t capvals_e[] =
|
---|
| 413 | {
|
---|
| 414 | CAP_CHOWN, CAP_FOWNER, CAP_FSETID,
|
---|
| 415 | CAP_LINUX_IMMUTABLE, CAP_MKNOD, CAP_NET_ADMIN,
|
---|
| 416 | CAP_NET_BIND_SERVICE, CAP_NET_BROADCAST, CAP_NET_RAW,
|
---|
| 417 | CAP_SYS_ADMIN, CAP_SYS_BOOT, CAP_SYS_CHROOT,
|
---|
| 418 | CAP_SYS_PACCT, CAP_SYS_PTRACE, CAP_SYS_RAWIO,
|
---|
| 419 | CAP_SYS_RESOURCE, CAP_SYS_TIME, CAP_SYS_TTY_CONFIG,
|
---|
| 420 | CAP_SETGID, CAP_SETUID, CAP_KILL,
|
---|
| 421 | CAP_DAC_OVERRIDE,
|
---|
| 422 | #if !defined(WITH_MESSAGE_QUEUE)
|
---|
| 423 | CAP_IPC_OWNER,
|
---|
| 424 | #endif
|
---|
| 425 | CAP_SYS_MODULE, CAP_LEASE
|
---|
| 426 | };
|
---|
| 427 | cap_value_t capvals_p[] =
|
---|
| 428 | {
|
---|
| 429 | CAP_CHOWN, CAP_LEASE, CAP_FSETID,
|
---|
| 430 | CAP_LINUX_IMMUTABLE, CAP_MKNOD, CAP_NET_ADMIN,
|
---|
| 431 | CAP_NET_BIND_SERVICE, CAP_NET_BROADCAST, CAP_NET_RAW,
|
---|
| 432 | CAP_SYS_ADMIN, CAP_SYS_BOOT, CAP_SYS_CHROOT,
|
---|
| 433 | CAP_SYS_PACCT, CAP_SYS_PTRACE, CAP_SYS_RAWIO,
|
---|
| 434 | CAP_SYS_RESOURCE, CAP_SYS_TIME, CAP_SYS_TTY_CONFIG,
|
---|
| 435 | #if !defined(WITH_EXTERNAL) && !defined(HAVE_UNIX_RANDOM)
|
---|
| 436 | CAP_SETGID, CAP_SETUID, CAP_KILL,
|
---|
| 437 | #endif
|
---|
| 438 | #if !defined(SH_USE_SUIDCHK)
|
---|
| 439 | CAP_DAC_OVERRIDE, CAP_FOWNER,
|
---|
| 440 | #endif
|
---|
| 441 | #if !defined(WITH_MESSAGE_QUEUE)
|
---|
| 442 | CAP_IPC_OWNER,
|
---|
| 443 | #endif
|
---|
| 444 | CAP_SYS_MODULE
|
---|
| 445 | };
|
---|
| 446 |
|
---|
| 447 | if (0 == sl_useCaps) /* 0 = S_FALSE */
|
---|
| 448 | {
|
---|
| 449 | return 0;
|
---|
| 450 | }
|
---|
| 451 |
|
---|
| 452 | if(NULL == (caps = cap_get_proc()))
|
---|
| 453 | {
|
---|
| 454 | return errno;
|
---|
| 455 | }
|
---|
| 456 |
|
---|
| 457 | capflag = CAP_EFFECTIVE;
|
---|
| 458 | if (0 != cap_set_flag(caps, capflag, sizeof(capvals_e)/sizeof(cap_value_t),
|
---|
| 459 | capvals_e, capfval))
|
---|
| 460 | {
|
---|
| 461 | error = errno;
|
---|
| 462 | cap_free(caps);
|
---|
| 463 | return error;
|
---|
| 464 | }
|
---|
| 465 | if (0 != cap_set_proc(caps))
|
---|
| 466 | {
|
---|
| 467 | error = errno;
|
---|
| 468 | cap_free(caps);
|
---|
| 469 | return error;
|
---|
| 470 | }
|
---|
| 471 |
|
---|
| 472 | capflag = CAP_PERMITTED;
|
---|
| 473 | if (0 != cap_set_flag(caps, capflag, sizeof(capvals_p)/sizeof(cap_value_t),
|
---|
| 474 | capvals_p, capfval))
|
---|
| 475 | {
|
---|
| 476 | error = errno;
|
---|
| 477 | cap_free(caps);
|
---|
| 478 | return error;
|
---|
| 479 | }
|
---|
| 480 | if (0 != cap_set_proc(caps))
|
---|
| 481 | {
|
---|
| 482 | error = errno;
|
---|
| 483 | cap_free(caps);
|
---|
| 484 | return error;
|
---|
| 485 | }
|
---|
| 486 | cap_free(caps);
|
---|
| 487 | return 0;
|
---|
| 488 | }
|
---|
| 489 |
|
---|
| 490 | int sl_drop_cap_int(int what)
|
---|
| 491 | {
|
---|
| 492 | #if defined(SL_DEBUG)
|
---|
| 493 | char * captext;
|
---|
| 494 | #endif
|
---|
| 495 | cap_flag_t capflag = CAP_EFFECTIVE;
|
---|
| 496 | cap_flag_value_t capfval = CAP_CLEAR;
|
---|
| 497 | cap_value_t capvals_a[] = { CAP_SETGID, CAP_SETUID, CAP_KILL };
|
---|
| 498 | cap_value_t capvals_b[] = { CAP_DAC_OVERRIDE, CAP_FOWNER };
|
---|
| 499 | cap_value_t * capvals;
|
---|
| 500 | int nvals;
|
---|
| 501 | int error = 0;
|
---|
| 502 | cap_t caps = cap_get_proc();
|
---|
| 503 |
|
---|
| 504 | if (0 == sl_useCaps) /* 0 = S_FALSE */
|
---|
| 505 | {
|
---|
| 506 | return 0;
|
---|
| 507 | }
|
---|
| 508 |
|
---|
| 509 | if (caps == NULL)
|
---|
| 510 | {
|
---|
| 511 | return errno;
|
---|
| 512 | }
|
---|
| 513 |
|
---|
| 514 | switch (what) {
|
---|
| 515 | case 1:
|
---|
| 516 | capvals = capvals_a;
|
---|
| 517 | nvals = 3;
|
---|
| 518 | capfval = CAP_CLEAR;
|
---|
| 519 | break;
|
---|
| 520 | case 2:
|
---|
| 521 | capvals = capvals_a;
|
---|
| 522 | nvals = 3;
|
---|
| 523 | capfval = CAP_SET;
|
---|
| 524 | break;
|
---|
| 525 | case 3:
|
---|
| 526 | capvals = capvals_b;
|
---|
| 527 | nvals = 2;
|
---|
| 528 | capfval = CAP_CLEAR;
|
---|
| 529 | break;
|
---|
| 530 | case 4:
|
---|
| 531 | capvals = capvals_b;
|
---|
| 532 | nvals = 2;
|
---|
| 533 | capfval = CAP_SET;
|
---|
| 534 | break;
|
---|
| 535 | default:
|
---|
| 536 | return (0);
|
---|
| 537 | }
|
---|
| 538 |
|
---|
| 539 | if (0 != cap_set_flag(caps, capflag, nvals, capvals, capfval))
|
---|
| 540 | {
|
---|
| 541 | error = errno;
|
---|
| 542 | cap_free(caps);
|
---|
| 543 | return error;
|
---|
| 544 | }
|
---|
| 545 | if (0 != cap_set_proc(caps))
|
---|
| 546 | {
|
---|
| 547 | error = errno;
|
---|
| 548 | cap_free(caps);
|
---|
| 549 | return error;
|
---|
| 550 | }
|
---|
| 551 | #if defined(SL_DEBUG)
|
---|
| 552 | captext = cap_to_text(caps, NULL);
|
---|
| 553 | TPT(( 0, FIL__, __LINE__, _("msg=<cap_int %d: %s>\n"), what, captext));
|
---|
| 554 | cap_free(captext);
|
---|
| 555 | #endif
|
---|
| 556 | cap_free(caps);
|
---|
| 557 | return 0;
|
---|
| 558 | }
|
---|
| 559 |
|
---|
| 560 | int sl_drop_cap_sub() { return sl_drop_cap_int(1); }
|
---|
| 561 | int sl_get_cap_sub() { return sl_drop_cap_int(2); }
|
---|
| 562 | int sl_drop_cap_qdel() { return sl_drop_cap_int(3); }
|
---|
| 563 | int sl_get_cap_qdel() { return sl_drop_cap_int(4); }
|
---|
| 564 |
|
---|
| 565 | #else
|
---|
| 566 | int sl_drop_cap () { return 0; }
|
---|
| 567 | int sl_drop_cap_sub() { return 0; }
|
---|
| 568 | int sl_get_cap_sub() { return 0; }
|
---|
| 569 | int sl_drop_cap_qdel() { return 0; }
|
---|
| 570 | int sl_get_cap_qdel() { return 0; }
|
---|
| 571 | #endif
|
---|
| 572 |
|
---|
| 573 | /* ----------------------------------------------------------------
|
---|
| 574 | *
|
---|
| 575 | * String handling routines
|
---|
| 576 | *
|
---|
| 577 | * ---------------------------------------------------------------- */
|
---|
| 578 |
|
---|
| 579 | /*
|
---|
[76] | 580 | * Have memset in a different translation unit (i.e. this) to prevent
|
---|
| 581 | * it to get optimized away
|
---|
[1] | 582 | */
|
---|
| 583 | void *sl_memset(void *s, int c, size_t n)
|
---|
| 584 | {
|
---|
[76] | 585 | return memset(s, c,n);
|
---|
[1] | 586 | }
|
---|
| 587 |
|
---|
| 588 |
|
---|
| 589 | #if !defined (VA_COPY)
|
---|
| 590 | #if defined (__GNUC__) && defined (__PPC__) && (defined (_CALL_SYSV) || defined (_WIN32))
|
---|
| 591 | #define VA_COPY(ap1, ap2) (*(ap1) = *(ap2))
|
---|
| 592 | #elif defined (VA_COPY_AS_ARRAY)
|
---|
| 593 | #define VA_COPY(ap1, ap2) memmove ((ap1), (ap2), sizeof (va_list))
|
---|
| 594 | #else /* va_list is a pointer */
|
---|
| 595 | #define VA_COPY(ap1, ap2) ((ap1) = (ap2))
|
---|
| 596 | #endif
|
---|
| 597 | #endif
|
---|
| 598 |
|
---|
| 599 | #if !defined(HAVE_VSNPRINTF) || defined(HAVE_BROKEN_VSNPRINTF)
|
---|
| 600 | static
|
---|
| 601 | size_t sl_printf_count (const char * fmt, va_list vl)
|
---|
| 602 | {
|
---|
| 603 | size_t length = 1;
|
---|
| 604 | int fini = 0;
|
---|
| 605 | int islong = 0;
|
---|
| 606 | int islonglong = 0;
|
---|
| 607 | int islongdouble = 0;
|
---|
| 608 | char * string_arg;
|
---|
| 609 |
|
---|
| 610 | SL_ENTER(_("sl_printf_count"));
|
---|
| 611 |
|
---|
| 612 | if (fmt == NULL)
|
---|
| 613 | SL_IRETURN(SL_ENULL, _("sl_printf_count"));
|
---|
| 614 |
|
---|
| 615 | while (*fmt) {
|
---|
| 616 |
|
---|
| 617 | if ( (*fmt) == '%' ) { /* a format specifier */
|
---|
| 618 |
|
---|
| 619 | fmt++; /* point to first char after '%' */
|
---|
| 620 |
|
---|
| 621 | fini = 0;
|
---|
| 622 | islong = 0;
|
---|
| 623 | islongdouble = 0;
|
---|
| 624 |
|
---|
| 625 | while (*fmt && (fini == 0) ) {
|
---|
| 626 |
|
---|
| 627 | switch (*fmt) {
|
---|
| 628 |
|
---|
| 629 | case '*': /* field width supplied by an integer */
|
---|
| 630 | length = length + va_arg (vl, int);
|
---|
| 631 | ++fmt;
|
---|
| 632 | break;
|
---|
| 633 | case '1':
|
---|
| 634 | case '2':
|
---|
| 635 | case '3':
|
---|
| 636 | case '4':
|
---|
| 637 | case '5':
|
---|
| 638 | case '6':
|
---|
| 639 | case '7':
|
---|
| 640 | case '8':
|
---|
| 641 | case '9':
|
---|
| 642 | length = length + strtol (fmt, (char**) &fmt, 10);
|
---|
| 643 | /* strtol makes FastForward to first invalid char */
|
---|
| 644 | break;
|
---|
| 645 |
|
---|
| 646 | case 'l': /* 'long' modifier */
|
---|
| 647 | if (islong == 0)
|
---|
| 648 | islong = 1;
|
---|
| 649 | else
|
---|
| 650 | {
|
---|
| 651 | islonglong = 1;
|
---|
| 652 | islong = 0;
|
---|
| 653 | }
|
---|
| 654 | ++fmt;
|
---|
| 655 | break;
|
---|
| 656 |
|
---|
| 657 | case 'L': /* 'long double' modifier */
|
---|
| 658 | #ifdef HAVE_LONG_DOUBLE
|
---|
| 659 | islongdouble = 1;
|
---|
| 660 | #else
|
---|
| 661 | islong = 1;
|
---|
| 662 | #endif
|
---|
| 663 | ++fmt;
|
---|
| 664 | break;
|
---|
| 665 |
|
---|
| 666 | case 'd':
|
---|
| 667 | case 'i':
|
---|
| 668 | case 'o':
|
---|
| 669 | case 'u':
|
---|
| 670 | case 'x':
|
---|
| 671 | case 'X':
|
---|
| 672 | if (islonglong == 1)
|
---|
| 673 | #ifdef HAVE_LONG_LONG
|
---|
| 674 | (void) va_arg (vl, long long);
|
---|
| 675 | #else
|
---|
| 676 | (void) va_arg (vl, long);
|
---|
| 677 | #endif
|
---|
| 678 | else if (islong == 1)
|
---|
| 679 | (void) va_arg (vl, long);
|
---|
| 680 | else
|
---|
| 681 | (void) va_arg (vl, int);
|
---|
| 682 | islong = 0;
|
---|
| 683 | islonglong = 0;
|
---|
| 684 | length = length + 24;
|
---|
| 685 | ++fmt;
|
---|
| 686 | fini = 1;
|
---|
| 687 | break;
|
---|
| 688 |
|
---|
| 689 | case 'D':
|
---|
| 690 | case 'O':
|
---|
| 691 | case 'U':
|
---|
| 692 | (void) va_arg (vl, long);
|
---|
| 693 | length = length + 24;
|
---|
| 694 | fmt++;
|
---|
| 695 | fini = 1;
|
---|
| 696 | break;
|
---|
| 697 |
|
---|
| 698 | case 'e':
|
---|
| 699 | case 'E':
|
---|
| 700 | case 'f':
|
---|
| 701 | case 'g':
|
---|
| 702 | #ifdef HAVE_LONG_DOUBLE
|
---|
| 703 | if (islongdouble == 1) {
|
---|
| 704 | (void) va_arg (vl, long double);
|
---|
| 705 | islongdouble = 0;
|
---|
| 706 | length = length + 20;
|
---|
| 707 | }
|
---|
| 708 | else
|
---|
| 709 | #endif
|
---|
| 710 | (void) va_arg (vl, double);
|
---|
| 711 | length = length + 20;
|
---|
| 712 | fini = 1;
|
---|
| 713 | ++fmt;
|
---|
| 714 | break;
|
---|
| 715 |
|
---|
| 716 | case 's':
|
---|
| 717 | string_arg = va_arg (vl, char *);
|
---|
| 718 | if (string_arg != NULL)
|
---|
| 719 | length = length + sl_strlen (string_arg);
|
---|
| 720 | else
|
---|
| 721 | length = length + 16;
|
---|
| 722 | fini = 1;
|
---|
| 723 | ++fmt;
|
---|
| 724 | break;
|
---|
| 725 |
|
---|
| 726 | case 'c':
|
---|
| 727 | (void) va_arg (vl, int);
|
---|
| 728 | length = length + 1;
|
---|
| 729 | fini = 1;
|
---|
| 730 | ++fmt;
|
---|
| 731 | break;
|
---|
| 732 |
|
---|
| 733 | case 'p':
|
---|
| 734 | case 'n':
|
---|
| 735 | (void) va_arg (vl, void * );
|
---|
| 736 | length = length + 32;
|
---|
| 737 | fini = 1;
|
---|
| 738 | ++fmt;
|
---|
| 739 | break;
|
---|
| 740 |
|
---|
| 741 | case '%': /* %% will print '%' */
|
---|
| 742 | length = length + 1;
|
---|
| 743 | fini = 1;
|
---|
| 744 | ++fmt;
|
---|
| 745 | break;
|
---|
| 746 |
|
---|
| 747 | default:
|
---|
| 748 | length = length + 1;
|
---|
| 749 | ++fmt;
|
---|
| 750 | break;
|
---|
| 751 |
|
---|
| 752 | } /* end switch */
|
---|
| 753 | }
|
---|
| 754 | /* end parsing a single format specifier */
|
---|
| 755 | } else {
|
---|
| 756 | length = length + 1;
|
---|
| 757 | fmt++;
|
---|
| 758 | }
|
---|
| 759 | }
|
---|
| 760 | SL_IRETURN(length, _("sl_printf_count"));
|
---|
| 761 | }
|
---|
| 762 | #endif /* #ifndef HAVE_VSNPRINTF */
|
---|
| 763 |
|
---|
| 764 | /*
|
---|
| 765 | * An implementation of vsnprintf. va_start/va_end are in the caller
|
---|
| 766 | * function.
|
---|
| 767 | * Returns C99 (#bytes that would heve been written) on success.
|
---|
| 768 | */
|
---|
| 769 | int sl_vsnprintf(char *str, size_t n,
|
---|
| 770 | const char *format, va_list vl )
|
---|
| 771 | {
|
---|
| 772 | int len = 0;
|
---|
| 773 | #if !defined(HAVE_VSNPRINTF) || defined(HAVE_BROKEN_VSNPRINTF)
|
---|
| 774 | size_t total;
|
---|
| 775 | va_list vl2;
|
---|
| 776 | #endif
|
---|
| 777 |
|
---|
| 778 | SL_ENTER(_("sl_vsnprintf"));
|
---|
| 779 | if (str == NULL || format == NULL)
|
---|
| 780 | SL_IRETURN(0, _("sl_vsnprintf"));
|
---|
| 781 |
|
---|
| 782 | #if defined(HAVE_VSNPRINTF) && !defined(HAVE_BROKEN_VSNPRINTF)
|
---|
[22] | 783 | len = vsnprintf (str, n, format, vl); /* flawfinder: ignore */
|
---|
[1] | 784 | str[n-1] = '\0';
|
---|
| 785 | #else
|
---|
[22] | 786 | VA_COPY (vl2, vl); /* save the argument list */
|
---|
[1] | 787 | total = sl_printf_count (format, vl);
|
---|
[22] | 788 | len = (int) total;
|
---|
[1] | 789 | if (total < n)
|
---|
| 790 | {
|
---|
[22] | 791 | /* flawfinder: ignore */
|
---|
[1] | 792 | vsprintf (str, format, vl2); /* program has checked that it fits */
|
---|
| 793 | str[n-1] = '\0';
|
---|
| 794 | }
|
---|
| 795 | else
|
---|
| 796 | {
|
---|
| 797 | sl_strlcpy (str, format, n);
|
---|
| 798 | va_end(vl2);
|
---|
| 799 | SL_IRETURN(len, _("sl_vsnprintf"));
|
---|
| 800 | }
|
---|
| 801 | va_end(vl2);
|
---|
| 802 | #endif
|
---|
| 803 | SL_IRETURN(len, _("sl_vsnprintf"));
|
---|
| 804 | }
|
---|
| 805 |
|
---|
| 806 | /*
|
---|
| 807 | * An implementation of snprintf.
|
---|
| 808 | * Returns SL_ENONE on success.
|
---|
| 809 | * ENULL: src || format == NULL
|
---|
| 810 | * ERANGE: n out of range
|
---|
[22] | 811 | * ETRUNC: truncated (unimplemented)
|
---|
[1] | 812 | */
|
---|
| 813 | int sl_snprintf(char *str, size_t n,
|
---|
| 814 | const char *format, ... )
|
---|
| 815 | {
|
---|
| 816 | va_list vl;
|
---|
| 817 | #if !defined(HAVE_VSNPRINTF) || defined(HAVE_BROKEN_VSNPRINTF)
|
---|
| 818 | size_t total = 0;
|
---|
| 819 | va_list vl2;
|
---|
| 820 | #endif
|
---|
| 821 |
|
---|
| 822 | SL_ENTER(_("sl_snprintf"));
|
---|
| 823 | if (str == NULL || format == NULL)
|
---|
| 824 | SL_IRETURN(SL_ENULL, _("sl_snprintf"));
|
---|
| 825 |
|
---|
| 826 | va_start (vl, format);
|
---|
| 827 | #if defined(HAVE_VSNPRINTF) && !defined(HAVE_BROKEN_VSNPRINTF)
|
---|
[22] | 828 | /* flawfinder: ignore */
|
---|
[1] | 829 | vsnprintf (str, n, format, vl);
|
---|
| 830 | str[n-1] = '\0';
|
---|
| 831 | #else
|
---|
| 832 | VA_COPY (vl2, vl); /* save the argument list */
|
---|
| 833 | total = sl_printf_count (format, vl);
|
---|
| 834 | if (total < n)
|
---|
| 835 | {
|
---|
[22] | 836 | /* flawfinder: ignore */
|
---|
[1] | 837 | vsprintf (str, format, vl2); /* program has checked that it fits */
|
---|
| 838 | str[n-1] = '\0';
|
---|
| 839 | }
|
---|
| 840 | else
|
---|
| 841 | {
|
---|
| 842 | sl_strlcpy (str, format, n);
|
---|
| 843 | va_end(vl2);
|
---|
| 844 | va_end(vl);
|
---|
| 845 | SL_IRETURN(SL_ETRUNC, _("sl_snprintf"));
|
---|
| 846 | }
|
---|
| 847 | va_end(vl2);
|
---|
| 848 | #endif
|
---|
| 849 | va_end(vl);
|
---|
| 850 | SL_IRETURN(SL_ENONE, _("sl_snprintf"));
|
---|
| 851 | }
|
---|
| 852 |
|
---|
| 853 | /*
|
---|
| 854 | * Appends src to string dst of size siz (unlike strncat, siz is the
|
---|
| 855 | * full size of dst, not space left). At most siz-1 characters
|
---|
| 856 | * will be copied. Always NUL terminates (unless siz == 0).
|
---|
| 857 | * Returns SL_NONE on success, errcode on failure.
|
---|
| 858 | *
|
---|
| 859 | * ENULL: dst == NULL
|
---|
| 860 | * ERANGE: siz out of range
|
---|
| 861 | * ETRUNC: src truncated
|
---|
| 862 | */
|
---|
| 863 | int sl_strlcat(char * dst, /*@null@*/const char *src, size_t siz)
|
---|
| 864 | {
|
---|
| 865 | register size_t dst_end;
|
---|
| 866 | register size_t dst_free;
|
---|
| 867 |
|
---|
| 868 | register char * p;
|
---|
| 869 | register const char * q;
|
---|
| 870 |
|
---|
[76] | 871 | if (!(dst == NULL || src == NULL || *src == '\0'))
|
---|
| 872 | {
|
---|
| 873 | if (siz > 0)
|
---|
| 874 | {
|
---|
[1] | 875 |
|
---|
[76] | 876 | /* How much free space do we have ?
|
---|
| 877 | */
|
---|
| 878 | dst_end = strlen(dst);
|
---|
| 879 | dst_free = siz - dst_end - 1;
|
---|
| 880 |
|
---|
| 881 | p = &dst[dst_end];
|
---|
| 882 | q = src;
|
---|
| 883 |
|
---|
| 884 | while (dst_free > 0 && *q != '\0')
|
---|
| 885 | {
|
---|
| 886 | *p++ = *q++;
|
---|
| 887 | --dst_free;
|
---|
| 888 | }
|
---|
| 889 |
|
---|
| 890 | /* NULL terminate dst.
|
---|
| 891 | */
|
---|
| 892 | *p = '\0';
|
---|
| 893 |
|
---|
| 894 | if (*q == '\0')
|
---|
| 895 | return SL_ENONE;
|
---|
| 896 | else
|
---|
| 897 | return SL_ETRUNC;
|
---|
| 898 | }
|
---|
| 899 | }
|
---|
[1] | 900 | return SL_ENONE;
|
---|
| 901 | }
|
---|
| 902 |
|
---|
| 903 | /*
|
---|
| 904 | * An alternative implementation of the OpenBSD strlcpy() function.
|
---|
| 905 | *
|
---|
| 906 | * Copy src to string dst of size siz. At most siz-1 characters
|
---|
| 907 | * will be copied. Always NUL terminates (unless siz == 0).
|
---|
| 908 | * Returns SL_NONE on success, errcode on failure.
|
---|
| 909 | *
|
---|
| 910 | * ENULL: dst == NULL
|
---|
| 911 | * ERANGE: siz out of range
|
---|
| 912 | * ETRUNC: src truncated
|
---|
| 913 | */
|
---|
| 914 | int sl_strlcpy(char * dst, /*@null@*/const char * src, size_t siz)
|
---|
| 915 | {
|
---|
| 916 | /* SL_ENTER(_("sl_strlcpy")); */
|
---|
| 917 |
|
---|
[76] | 918 | if (!((dst == NULL) || (src == NULL)))
|
---|
| 919 | {
|
---|
| 920 | if (siz > 0) {
|
---|
| 921 | /* copy siz-1 characters
|
---|
| 922 | */
|
---|
| 923 | (void) strncpy(dst, src, siz-1);
|
---|
| 924 |
|
---|
| 925 | /* NULL terminate
|
---|
| 926 | */
|
---|
| 927 | dst[siz-1] = '\0';
|
---|
| 928 | }
|
---|
| 929 | return SL_ENONE;
|
---|
| 930 | }
|
---|
| 931 | else if (src == NULL)
|
---|
| 932 | {
|
---|
[383] | 933 | if (dst && siz > 0)
|
---|
[1] | 934 | dst[0] = '\0';
|
---|
| 935 | return SL_ENONE;
|
---|
| 936 | }
|
---|
[76] | 937 | else
|
---|
| 938 | {
|
---|
| 939 | return SL_ENULL;
|
---|
| 940 | }
|
---|
[1] | 941 | }
|
---|
| 942 |
|
---|
| 943 | /*
|
---|
| 944 | * A robust drop-in replacement of strncpy. strlcpy is preferable.
|
---|
| 945 | */
|
---|
| 946 | char * sl_strncpy(char *dst, const char *src, size_t size)
|
---|
| 947 | {
|
---|
| 948 |
|
---|
| 949 | #ifdef SL_FAIL_ON_ERROR
|
---|
| 950 | SL_REQUIRE(dst != NULL, _("dst != NULL"));
|
---|
| 951 | SL_REQUIRE(src != NULL, _("src != NULL"));
|
---|
| 952 | SL_REQUIRE(size > 0, _("size > 0"));
|
---|
| 953 | #endif
|
---|
| 954 |
|
---|
| 955 | if (dst == NULL)
|
---|
| 956 | {
|
---|
| 957 | sl_errno = SL_ENULL;
|
---|
| 958 | return (NULL);
|
---|
| 959 | }
|
---|
| 960 | if (size < 1)
|
---|
| 961 | {
|
---|
| 962 | sl_errno = SL_ERANGE;
|
---|
| 963 | return (dst);
|
---|
| 964 | }
|
---|
| 965 | if (!src)
|
---|
| 966 | {
|
---|
| 967 | sl_errno = SL_ENULL;
|
---|
| 968 | dst[0] = '\0';
|
---|
| 969 | }
|
---|
| 970 | else if (src[0] == '\0')
|
---|
| 971 | dst[0] = '\0';
|
---|
| 972 | else
|
---|
| 973 | strncpy(dst, src, size);
|
---|
| 974 |
|
---|
| 975 | if (sl_strlen(src) >= size)
|
---|
| 976 | {
|
---|
| 977 | errno = ENOSPC;
|
---|
| 978 | dst[size-1] = '\0';
|
---|
| 979 | }
|
---|
| 980 | return (dst);
|
---|
| 981 | }
|
---|
| 982 |
|
---|
| 983 | /*
|
---|
| 984 | * A robust drop-in replacement of strncat. strlcat is preferable.
|
---|
| 985 | */
|
---|
| 986 | char * sl_strncat(char *dst, const char *src, size_t n)
|
---|
| 987 | {
|
---|
| 988 | #ifdef SL_FAIL_ON_ERROR
|
---|
| 989 | SL_REQUIRE(dst != NULL, _("dst != NULL"));
|
---|
| 990 | SL_REQUIRE(src != NULL, _("src != NULL"));
|
---|
| 991 | SL_REQUIRE(n > 0, _("n > 0"));
|
---|
| 992 | #endif
|
---|
| 993 |
|
---|
| 994 | if (dst == NULL)
|
---|
| 995 | {
|
---|
| 996 | sl_errno = SL_ENULL;
|
---|
| 997 | return (NULL);
|
---|
| 998 | }
|
---|
| 999 | if (n < 1)
|
---|
| 1000 | {
|
---|
| 1001 | sl_errno = SL_ERANGE;
|
---|
| 1002 | return (dst);
|
---|
| 1003 | }
|
---|
| 1004 | if (!src)
|
---|
| 1005 | {
|
---|
| 1006 | sl_errno = SL_ENULL;
|
---|
| 1007 | return (dst);
|
---|
| 1008 | }
|
---|
| 1009 | else if (src[0] == '\0')
|
---|
| 1010 | dst[0] = '\0';
|
---|
| 1011 | else
|
---|
| 1012 | strncat(dst, src, n);
|
---|
| 1013 |
|
---|
| 1014 | return (dst);
|
---|
| 1015 | }
|
---|
| 1016 |
|
---|
[169] | 1017 | #include <ctype.h>
|
---|
| 1018 | int sl_strcasecmp(const char * one, const char * two)
|
---|
| 1019 | {
|
---|
| 1020 | #ifdef SL_FAIL_ON_ERROR
|
---|
| 1021 | SL_REQUIRE (one != NULL, _("one != NULL"));
|
---|
| 1022 | SL_REQUIRE (two != NULL, _("two != NULL"));
|
---|
| 1023 | #endif
|
---|
[1] | 1024 |
|
---|
[169] | 1025 | if (one && two)
|
---|
| 1026 | {
|
---|
| 1027 | do {
|
---|
| 1028 | if (*one && *two)
|
---|
| 1029 | {
|
---|
[290] | 1030 | if (tolower((int) *one) == tolower((int) *two))
|
---|
[169] | 1031 | {
|
---|
| 1032 | ++one; ++two;
|
---|
| 1033 | }
|
---|
[290] | 1034 | else if (tolower((int) *one) < tolower((int) *two))
|
---|
[169] | 1035 | return -1;
|
---|
| 1036 | else
|
---|
| 1037 | return 1;
|
---|
| 1038 | }
|
---|
| 1039 | else if (*one == '\0' && *two == '\0')
|
---|
| 1040 | return 0;
|
---|
| 1041 | else if (*one == '\0')
|
---|
| 1042 | return -1;
|
---|
| 1043 | else
|
---|
| 1044 | return 1;
|
---|
| 1045 | } while (1 == 1);
|
---|
| 1046 | }
|
---|
| 1047 | else if (one == NULL && two != NULL)
|
---|
| 1048 | return -1;
|
---|
| 1049 | else if (one != NULL && two == NULL)
|
---|
| 1050 | return 1;
|
---|
| 1051 | else
|
---|
| 1052 | return -7; /* default to not equal */
|
---|
| 1053 | }
|
---|
| 1054 |
|
---|
[1] | 1055 | int sl_strcmp(const char * a, const char * b)
|
---|
| 1056 | {
|
---|
| 1057 | #ifdef SL_FAIL_ON_ERROR
|
---|
| 1058 | SL_REQUIRE (a != NULL, _("a != NULL"));
|
---|
| 1059 | SL_REQUIRE (b != NULL, _("b != NULL"));
|
---|
| 1060 | #endif
|
---|
| 1061 |
|
---|
| 1062 | if (a != NULL && b != NULL)
|
---|
| 1063 | return (strcmp(a, b));
|
---|
| 1064 | else if (a == NULL && b != NULL)
|
---|
| 1065 | return (-1);
|
---|
| 1066 | else if (a != NULL && b == NULL)
|
---|
| 1067 | return (1);
|
---|
| 1068 | else
|
---|
[169] | 1069 | return (-7); /* default to not equal */
|
---|
[1] | 1070 | }
|
---|
| 1071 |
|
---|
| 1072 | int sl_strncmp(const char * a, const char * b, size_t n)
|
---|
| 1073 | {
|
---|
| 1074 | #ifdef SL_FAIL_ON_ERROR
|
---|
| 1075 | SL_REQUIRE (a != NULL, _("a != NULL"));
|
---|
| 1076 | SL_REQUIRE (b != NULL, _("b != NULL"));
|
---|
| 1077 | SL_REQUIRE (n > 0, _("n > 0"));
|
---|
| 1078 | #endif
|
---|
| 1079 |
|
---|
| 1080 | if (a != NULL && b != NULL)
|
---|
| 1081 | return (strncmp(a, b, n));
|
---|
| 1082 | else if (a == NULL && b != NULL)
|
---|
| 1083 | return (-1);
|
---|
| 1084 | else if (a != NULL && b == NULL)
|
---|
| 1085 | return (1);
|
---|
| 1086 | else
|
---|
[169] | 1087 | return (-7); /* default to not equal */
|
---|
[1] | 1088 | }
|
---|
| 1089 |
|
---|
[272] | 1090 | int sl_strncasecmp(const char * a, const char * b, size_t n)
|
---|
| 1091 | {
|
---|
| 1092 | #ifdef SL_FAIL_ON_ERROR
|
---|
| 1093 | SL_REQUIRE (a != NULL, _("a != NULL"));
|
---|
| 1094 | SL_REQUIRE (b != NULL, _("b != NULL"));
|
---|
| 1095 | SL_REQUIRE (n > 0, _("n > 0"));
|
---|
| 1096 | #endif
|
---|
| 1097 |
|
---|
| 1098 | if (a != NULL && b != NULL)
|
---|
| 1099 | return (strncasecmp(a, b, n));
|
---|
| 1100 | else if (a == NULL && b != NULL)
|
---|
| 1101 | return (-1);
|
---|
| 1102 | else if (a != NULL && b == NULL)
|
---|
| 1103 | return (1);
|
---|
| 1104 | else
|
---|
| 1105 | return (-7); /* default to not equal */
|
---|
| 1106 | }
|
---|
| 1107 |
|
---|
[1] | 1108 | /* string searching
|
---|
| 1109 | */
|
---|
| 1110 |
|
---|
[214] | 1111 | char * sl_strstr (const char * haystack, const char * needle)
|
---|
[1] | 1112 | {
|
---|
| 1113 | #ifndef HAVE_STRSTR
|
---|
[203] | 1114 | unsigned int i;
|
---|
[1] | 1115 | size_t needle_len;
|
---|
| 1116 | size_t haystack_len;
|
---|
| 1117 | #endif
|
---|
| 1118 |
|
---|
| 1119 | if (haystack == NULL || needle == NULL)
|
---|
| 1120 | return NULL;
|
---|
| 1121 | if (*needle == '\0' || *haystack == '\0')
|
---|
| 1122 | return NULL;
|
---|
| 1123 |
|
---|
| 1124 | #if defined(HAVE_STRSTR)
|
---|
| 1125 | return (strstr(haystack, needle));
|
---|
| 1126 | #else
|
---|
| 1127 | needle_len = strlen(needle);
|
---|
| 1128 | haystack_len = strlen(haystack);
|
---|
| 1129 |
|
---|
| 1130 | for (i = 0; i <= (haystack_len-needle_len); ++i)
|
---|
| 1131 | if (0 == sl_strncmp(&haystack[i], needle, needle_len))
|
---|
| 1132 | return (needle);
|
---|
| 1133 | return NULL;
|
---|
| 1134 | #endif
|
---|
| 1135 | }
|
---|
| 1136 |
|
---|
| 1137 |
|
---|
| 1138 | /* ----------------------------------------------------------------
|
---|
| 1139 | *
|
---|
| 1140 | * Privilege handling routines
|
---|
| 1141 | *
|
---|
| 1142 | * ---------------------------------------------------------------- */
|
---|
| 1143 |
|
---|
| 1144 |
|
---|
| 1145 |
|
---|
| 1146 | static uid_t euid;
|
---|
| 1147 | static uid_t ruid;
|
---|
| 1148 | static uid_t ruid_orig;
|
---|
| 1149 | static gid_t egid;
|
---|
| 1150 | static gid_t rgid;
|
---|
| 1151 | static gid_t rgid_orig;
|
---|
| 1152 |
|
---|
| 1153 | static int uids_are_stored = SL_FALSE;
|
---|
| 1154 | static int suid_is_set = SL_TRUE;
|
---|
| 1155 |
|
---|
| 1156 | #ifdef HAVE_SETRESUID
|
---|
| 1157 | extern int setresuid (uid_t truid, uid_t teuid, uid_t tsuid);
|
---|
| 1158 | extern int setresgid (gid_t trgid, gid_t tegid, gid_t tsgid);
|
---|
| 1159 | #endif
|
---|
| 1160 |
|
---|
| 1161 |
|
---|
| 1162 | /*
|
---|
| 1163 | * This function returns true if the program is SUID.
|
---|
| 1164 | * It calls abort() if the uid's are not saved already.
|
---|
| 1165 | */
|
---|
| 1166 | int sl_is_suid()
|
---|
| 1167 | {
|
---|
| 1168 | if (uids_are_stored == SL_FALSE)
|
---|
| 1169 | {
|
---|
| 1170 | if (getuid() == geteuid() && getgid() == getegid())
|
---|
| 1171 | return (0); /* FALSE */
|
---|
| 1172 | else
|
---|
| 1173 | return (1); /* TRUE */
|
---|
| 1174 | }
|
---|
| 1175 | else
|
---|
| 1176 | {
|
---|
| 1177 | if (euid == ruid && egid == rgid)
|
---|
| 1178 | return (0); /* FALSE */
|
---|
| 1179 | else
|
---|
| 1180 | return (1); /* TRUE */
|
---|
| 1181 | }
|
---|
| 1182 | }
|
---|
| 1183 |
|
---|
| 1184 | /*
|
---|
| 1185 | * This function returns the saved euid.
|
---|
| 1186 | * It calls abort() if the uid's are not saved already.
|
---|
| 1187 | */
|
---|
| 1188 | int sl_get_euid(uid_t * ret)
|
---|
| 1189 | {
|
---|
| 1190 | SL_ENTER(_("sl_get_euid"));
|
---|
| 1191 | /* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
|
---|
| 1192 | if (uids_are_stored == SL_TRUE)
|
---|
| 1193 | *ret = euid;
|
---|
| 1194 | else
|
---|
| 1195 | *ret = geteuid();
|
---|
| 1196 | SL_IRETURN (SL_ENONE, _("sl_get_euid"));
|
---|
| 1197 | }
|
---|
| 1198 |
|
---|
| 1199 | uid_t sl_ret_euid()
|
---|
| 1200 | {
|
---|
| 1201 | /* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
|
---|
| 1202 | if (uids_are_stored == SL_TRUE)
|
---|
| 1203 | return (euid);
|
---|
| 1204 | else
|
---|
| 1205 | return (geteuid());
|
---|
| 1206 | }
|
---|
| 1207 |
|
---|
| 1208 | /*
|
---|
| 1209 | * This function returns the saved egid.
|
---|
| 1210 | * It calls abort() if the uid's are not saved already.
|
---|
| 1211 | */
|
---|
| 1212 | int sl_get_egid(gid_t * ret)
|
---|
| 1213 | {
|
---|
| 1214 | SL_ENTER(_("sl_get_egid"));
|
---|
| 1215 | /* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
|
---|
| 1216 | if (uids_are_stored == SL_TRUE)
|
---|
| 1217 | *ret = egid;
|
---|
| 1218 | else
|
---|
| 1219 | *ret = getegid();
|
---|
| 1220 | SL_IRETURN (SL_ENONE, _("sl_get_egid"));
|
---|
| 1221 | }
|
---|
| 1222 |
|
---|
| 1223 | /*
|
---|
| 1224 | * This function returns the saved ruid.
|
---|
| 1225 | * It calls abort() if the uid's are not saved already.
|
---|
| 1226 | */
|
---|
| 1227 | int sl_get_ruid(uid_t * ret)
|
---|
| 1228 | {
|
---|
| 1229 | SL_ENTER(_("sl_get_ruid"));
|
---|
| 1230 | /* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
|
---|
| 1231 | if (uids_are_stored == SL_TRUE)
|
---|
| 1232 | *ret = ruid;
|
---|
| 1233 | else
|
---|
| 1234 | *ret = getuid();
|
---|
| 1235 | SL_IRETURN (SL_ENONE, _("sl_get_ruid"));
|
---|
| 1236 | }
|
---|
| 1237 |
|
---|
| 1238 | /*
|
---|
| 1239 | * This function returns the saved rgid.
|
---|
| 1240 | * It calls abort() if the uid's are not saved already.
|
---|
| 1241 | */
|
---|
| 1242 | int sl_get_rgid(gid_t * ret)
|
---|
| 1243 | {
|
---|
| 1244 | SL_ENTER(_("sl_get_rgid"));
|
---|
| 1245 | /* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
|
---|
| 1246 | if (uids_are_stored == SL_TRUE)
|
---|
| 1247 | *ret = rgid;
|
---|
| 1248 | else
|
---|
| 1249 | *ret = getgid();
|
---|
| 1250 | SL_IRETURN (SL_ENONE, _("sl_get_rgid"));
|
---|
| 1251 | }
|
---|
| 1252 |
|
---|
| 1253 | /*
|
---|
| 1254 | * This function returns the saved original ruid.
|
---|
| 1255 | * It calls abort() if the uid's are not saved already.
|
---|
| 1256 | */
|
---|
| 1257 | int sl_get_ruid_orig(uid_t * ret)
|
---|
| 1258 | {
|
---|
| 1259 | SL_ENTER(_("sl_get_ruid_orig"));
|
---|
| 1260 | /* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
|
---|
| 1261 | if (uids_are_stored == SL_TRUE)
|
---|
| 1262 | *ret = ruid_orig;
|
---|
| 1263 | else
|
---|
| 1264 | *ret = getuid();
|
---|
| 1265 | SL_IRETURN (SL_ENONE, _("sl_get_ruid_orig"));
|
---|
| 1266 | }
|
---|
| 1267 |
|
---|
| 1268 | /*
|
---|
| 1269 | * This function returns the saved original rgid.
|
---|
| 1270 | * It calls abort() if the uid's are not saved already.
|
---|
| 1271 | */
|
---|
| 1272 | int sl_get_rgid_orig(gid_t * ret)
|
---|
| 1273 | {
|
---|
| 1274 | SL_ENTER(_("sl_get_rgid_orig"));
|
---|
| 1275 | /* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
|
---|
| 1276 | if (uids_are_stored == SL_TRUE)
|
---|
| 1277 | *ret = rgid_orig;
|
---|
| 1278 | else
|
---|
| 1279 | *ret = getgid();
|
---|
| 1280 | SL_IRETURN (SL_ENONE, _("sl_get_rgid_orig"));
|
---|
| 1281 | }
|
---|
| 1282 |
|
---|
| 1283 | static int suid_warn_flag = 1;
|
---|
| 1284 | static void suid_warn(int a)
|
---|
| 1285 | {
|
---|
| 1286 | fprintf(stderr, _("ERROR: open set/unset suid !!! %d\n"), a);
|
---|
| 1287 | return;
|
---|
| 1288 | }
|
---|
| 1289 |
|
---|
| 1290 | /*
|
---|
| 1291 | * This function sets the effective uid
|
---|
| 1292 | * to the saved effective uid.
|
---|
| 1293 | * It will abort on failure.
|
---|
| 1294 | */
|
---|
| 1295 | int sl_set_suid ()
|
---|
| 1296 | {
|
---|
| 1297 | int retval;
|
---|
| 1298 |
|
---|
| 1299 | SL_ENTER(_("sl_set_suid"));
|
---|
| 1300 |
|
---|
| 1301 | if (uids_are_stored == SL_FALSE)
|
---|
| 1302 | {
|
---|
| 1303 | SL_IRETURN(SL_ENONE, _("sl_set_suid"));
|
---|
| 1304 | }
|
---|
| 1305 |
|
---|
| 1306 | SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));
|
---|
| 1307 |
|
---|
| 1308 | if (ruid == euid && rgid == egid)
|
---|
| 1309 | {
|
---|
| 1310 | suid_is_set = SL_TRUE;
|
---|
| 1311 | SL_IRETURN(SL_ENONE, _("sl_set_suid"));
|
---|
| 1312 | }
|
---|
| 1313 | SL_REQUIRE(suid_is_set == SL_FALSE, _("suid_is_set == SL_FALSE"));
|
---|
| 1314 |
|
---|
| 1315 | #if defined(HAVE_SETRESUID)
|
---|
| 1316 | retval = setresuid (sh_uid_neg, euid, sh_uid_neg);
|
---|
| 1317 | if (retval == 0)
|
---|
| 1318 | retval = setresgid (sh_gid_neg, egid, sh_gid_neg);
|
---|
| 1319 |
|
---|
| 1320 | #elif defined(HAVE_SETEUID)
|
---|
| 1321 | retval = seteuid (egid);
|
---|
| 1322 | if (retval == 0)
|
---|
| 1323 | retval = setegid (euid);
|
---|
| 1324 |
|
---|
| 1325 | /* on AIX, setreuid does not behave well for non-root users.
|
---|
| 1326 | */
|
---|
| 1327 | #elif defined(HAVE_SETREUID)
|
---|
| 1328 | retval = setreuid (ruid, euid);
|
---|
| 1329 | if (retval == 0)
|
---|
| 1330 | retval = setregid (rgid, egid);
|
---|
| 1331 |
|
---|
| 1332 | #else
|
---|
| 1333 | retval = setuid (euid);
|
---|
| 1334 | if (retval == 0)
|
---|
| 1335 | retval = setgid (egid);
|
---|
| 1336 | #endif
|
---|
| 1337 | if (suid_warn_flag == 1)
|
---|
| 1338 | suid_warn(1);
|
---|
| 1339 | suid_warn_flag = 1;
|
---|
| 1340 |
|
---|
| 1341 | SL_REQUIRE(retval == 0, _("retval == 0"));
|
---|
| 1342 | suid_is_set = SL_TRUE;
|
---|
| 1343 | SL_IRETURN(SL_ENONE, _("sl_set_suid"));
|
---|
| 1344 | }
|
---|
| 1345 |
|
---|
| 1346 | /*
|
---|
| 1347 | * This function sets the effective uid to the real uid.
|
---|
| 1348 | * It will abort on failure.
|
---|
| 1349 | */
|
---|
| 1350 | int sl_unset_suid ()
|
---|
| 1351 | {
|
---|
| 1352 | register int retval;
|
---|
| 1353 |
|
---|
| 1354 | SL_ENTER(_("sl_unset_suid"));
|
---|
| 1355 |
|
---|
| 1356 | if (uids_are_stored == SL_FALSE)
|
---|
| 1357 | {
|
---|
| 1358 | SL_IRETURN(SL_ENONE, _("sl_unset_suid"));
|
---|
| 1359 | }
|
---|
| 1360 |
|
---|
| 1361 | SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));
|
---|
| 1362 |
|
---|
| 1363 | if (ruid == euid && rgid == egid)
|
---|
| 1364 | {
|
---|
| 1365 | suid_is_set = SL_FALSE;
|
---|
| 1366 | SL_IRETURN(SL_ENONE, _("sl_unset_suid"));
|
---|
| 1367 | }
|
---|
| 1368 | SL_REQUIRE(suid_is_set == SL_TRUE, _("suid_is_set == SL_TRUE"));
|
---|
| 1369 |
|
---|
| 1370 | #if defined(HAVE_SETRESUID)
|
---|
| 1371 | retval = setresgid (sh_gid_neg, rgid, sh_gid_neg);
|
---|
| 1372 | if (retval == 0)
|
---|
| 1373 | retval = setresuid (sh_uid_neg, ruid, sh_uid_neg);
|
---|
| 1374 |
|
---|
| 1375 | #elif defined(HAVE_SETEUID)
|
---|
| 1376 | retval = setegid (rgid);
|
---|
| 1377 | if (retval == 0)
|
---|
| 1378 | retval = seteuid (ruid);
|
---|
| 1379 |
|
---|
| 1380 | #elif defined(HAVE_SETREUID)
|
---|
| 1381 | retval = setregid (egid, rgid);
|
---|
| 1382 | if (retval == 0)
|
---|
| 1383 | retval = setreuid (euid, ruid);
|
---|
| 1384 |
|
---|
| 1385 | #else
|
---|
| 1386 | retval = setgid (rgid);
|
---|
| 1387 | if (retval == 0)
|
---|
| 1388 | retval = setuid (ruid);
|
---|
| 1389 | #endif
|
---|
| 1390 |
|
---|
| 1391 | if (suid_warn_flag == 0)
|
---|
| 1392 | suid_warn(0);
|
---|
| 1393 | suid_warn_flag = 0;
|
---|
| 1394 |
|
---|
| 1395 | SL_REQUIRE(retval == 0, _("retval == 0"));
|
---|
| 1396 | suid_is_set = SL_FALSE;
|
---|
| 1397 | SL_IRETURN(SL_ENONE, _("sl_unset_suid"));
|
---|
| 1398 | }
|
---|
| 1399 |
|
---|
| 1400 |
|
---|
| 1401 | /*
|
---|
| 1402 | * This function saves the uid's.
|
---|
| 1403 | */
|
---|
| 1404 | int sl_save_uids()
|
---|
| 1405 | {
|
---|
| 1406 | SL_ENTER(_("sl_save_uids"));
|
---|
| 1407 | if (uids_are_stored == SL_TRUE)
|
---|
| 1408 | SL_IRETURN(SL_EREPEAT, _("sl_save_uids"));
|
---|
| 1409 |
|
---|
| 1410 | ruid_orig = getuid();
|
---|
| 1411 | rgid_orig = getgid();
|
---|
| 1412 | egid = getegid();
|
---|
| 1413 | euid = geteuid();
|
---|
| 1414 | ruid = ruid_orig;
|
---|
| 1415 | rgid = rgid_orig;
|
---|
| 1416 | uids_are_stored = SL_TRUE;
|
---|
| 1417 |
|
---|
| 1418 | SL_IRETURN(SL_ENONE, _("sl_save_uids"));
|
---|
| 1419 | }
|
---|
| 1420 |
|
---|
| 1421 | /*
|
---|
| 1422 | * This function drops SUID privileges irrevocably.
|
---|
| 1423 | * It set the effective uid to the original real uid.
|
---|
| 1424 | */
|
---|
| 1425 | extern int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid);
|
---|
| 1426 | int sl_drop_privileges()
|
---|
| 1427 | {
|
---|
| 1428 | SL_ENTER(_("sl_drop_privileges"));
|
---|
| 1429 | SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));
|
---|
| 1430 |
|
---|
| 1431 | SL_REQUIRE(setgid(rgid_orig) == 0, _("setgid(rgid_orig) == 0"));
|
---|
| 1432 | SL_REQUIRE(sh_unix_initgroups2(ruid_orig, rgid_orig) == 0, _("sh_unix_initgroups2(ruid_orig,rgid_orig) == 0"));
|
---|
| 1433 | SL_REQUIRE(setuid(ruid_orig) == 0, _("setuid(ruid_orig) == 0"));
|
---|
| 1434 |
|
---|
| 1435 | /* make sure that setuid(0) fails
|
---|
| 1436 | */
|
---|
| 1437 | SL_REQUIRE(setuid(0) < 0, _("setuid(0) < 0"));
|
---|
| 1438 |
|
---|
| 1439 | euid = ruid_orig;
|
---|
| 1440 | egid = rgid_orig;
|
---|
| 1441 | ruid = ruid_orig;
|
---|
| 1442 | rgid = rgid_orig;
|
---|
| 1443 |
|
---|
| 1444 | SL_IRETURN(SL_ENONE, _("sl_drop_privileges"));
|
---|
| 1445 | }
|
---|
| 1446 |
|
---|
| 1447 | /*
|
---|
| 1448 | * Define a policy: Stay root.
|
---|
| 1449 | * Do nothing if not SUID.
|
---|
| 1450 | */
|
---|
| 1451 | int sl_policy_get_root()
|
---|
| 1452 | {
|
---|
| 1453 | SL_ENTER(_("sl_policy_get_root"));
|
---|
| 1454 | SL_REQUIRE(uids_are_stored == SL_FALSE, _("uids_are_stored == SL_FALSE"));
|
---|
| 1455 |
|
---|
| 1456 | SL_REQUIRE (sl_save_uids() == SL_ENONE, _("sl_save_uids() == SL_ENONE"));
|
---|
| 1457 |
|
---|
| 1458 | if (euid != ruid || egid != rgid)
|
---|
| 1459 | {
|
---|
| 1460 | SL_REQUIRE(setgid(egid) == 0, _("setgid(egid) == 0"));
|
---|
| 1461 | SL_REQUIRE(setuid(euid) == 0, _("setuid(euid) == 0"));
|
---|
| 1462 | SL_REQUIRE(ruid == getuid() && rgid == getgid(),
|
---|
| 1463 | _("ruid == getuid() && rgid == getgid()"));
|
---|
| 1464 | ruid = euid;
|
---|
| 1465 | rgid = egid;
|
---|
| 1466 | }
|
---|
| 1467 | suid_is_set = SL_TRUE;
|
---|
| 1468 | if (euid == 0)
|
---|
| 1469 | {
|
---|
| 1470 | SL_REQUIRE(sh_unix_initgroups2(euid, egid) == 0, _("sh_unix_initgroups2(euid,egid) == 0"));
|
---|
| 1471 | }
|
---|
| 1472 | SL_IRETURN(SL_ENONE, _("sl_policy_get_root"));
|
---|
| 1473 | }
|
---|
| 1474 |
|
---|
| 1475 | #include <pwd.h>
|
---|
| 1476 |
|
---|
| 1477 | /*
|
---|
| 1478 | * Define a policy: Get real (irrevocably).
|
---|
| 1479 | * This function drops SUID privileges irrevocably.
|
---|
| 1480 | * Do nothing if not SUID (? not true - drops if root).
|
---|
| 1481 | */
|
---|
| 1482 |
|
---|
| 1483 | int sl_policy_get_real(char * user)
|
---|
| 1484 | {
|
---|
| 1485 | SL_ENTER(_("sl_policy_get_real"));
|
---|
| 1486 | SL_REQUIRE(uids_are_stored == SL_FALSE, _("uids_are_stored == SL_FALSE"));
|
---|
| 1487 | SL_REQUIRE (sl_save_uids() == SL_ENONE, _("sl_save_uids() == SL_ENONE"));
|
---|
| 1488 |
|
---|
| 1489 | if (euid == 0 || ruid == 0)
|
---|
| 1490 | {
|
---|
[131] | 1491 | #if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
|
---|
| 1492 | struct passwd pwd;
|
---|
[227] | 1493 | char * buffer;
|
---|
[131] | 1494 | struct passwd * tempres;
|
---|
[227] | 1495 | buffer = malloc(SH_PWBUF_SIZE);
|
---|
| 1496 | SL_REQUIRE (buffer != NULL, _("buffer != NULL"));
|
---|
| 1497 | sh_getpwnam_r(user, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
|
---|
[131] | 1498 | #else
|
---|
| 1499 | struct passwd * tempres = sh_getpwnam(user);
|
---|
| 1500 | #endif
|
---|
[1] | 1501 |
|
---|
| 1502 | SL_REQUIRE (NULL != tempres, _("tempres != NULL"));
|
---|
| 1503 |
|
---|
| 1504 | rgid_orig = tempres->pw_gid;
|
---|
| 1505 | ruid_orig = tempres->pw_uid;
|
---|
[227] | 1506 | #if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
|
---|
| 1507 | free(buffer);
|
---|
| 1508 | #endif
|
---|
[1] | 1509 | }
|
---|
| 1510 | else
|
---|
| 1511 | {
|
---|
| 1512 | rgid_orig = rgid;
|
---|
| 1513 | ruid_orig = ruid;
|
---|
| 1514 | }
|
---|
| 1515 |
|
---|
| 1516 | SL_REQUIRE (sl_drop_privileges() == SL_ENONE,
|
---|
| 1517 | _("sl_drop_privileges() == SL_ENONE"));
|
---|
| 1518 |
|
---|
| 1519 | suid_is_set = SL_TRUE;
|
---|
| 1520 | SL_IRETURN(SL_ENONE, _("sl_policy_get_real"));
|
---|
| 1521 | }
|
---|
| 1522 |
|
---|
| 1523 |
|
---|
| 1524 | /*
|
---|
| 1525 | * Define a policy: Get user.
|
---|
| 1526 | * Drops privileges.
|
---|
| 1527 | * Do nothing if not SUID.
|
---|
| 1528 | */
|
---|
[170] | 1529 | int sl_policy_get_user(const char * user)
|
---|
[1] | 1530 | {
|
---|
| 1531 | SL_ENTER(_("sl_policy_get_user"));
|
---|
| 1532 |
|
---|
| 1533 | SL_REQUIRE(user != NULL, _("user != NULL"));
|
---|
| 1534 | SL_REQUIRE(uids_are_stored == SL_FALSE, _("uids_are_stored == SL_FALSE"));
|
---|
| 1535 | SL_REQUIRE (sl_save_uids() == SL_ENONE, _("sl_save_uids() == SL_ENONE"));
|
---|
| 1536 |
|
---|
[412] | 1537 | #ifndef SH_ALLOW_SUID
|
---|
[1] | 1538 | if (euid != ruid || egid != rgid)
|
---|
| 1539 | {
|
---|
[131] | 1540 | #if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
|
---|
| 1541 | struct passwd pwd;
|
---|
[227] | 1542 | char * buffer;
|
---|
[131] | 1543 | struct passwd * tempres;
|
---|
[227] | 1544 | buffer = malloc(SH_PWBUF_SIZE);
|
---|
| 1545 | SL_REQUIRE (buffer != NULL, _("buffer != NULL"));
|
---|
| 1546 | sh_getpwnam_r(user, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
|
---|
[131] | 1547 | #else
|
---|
| 1548 | struct passwd * tempres = sh_getpwnam(user);
|
---|
| 1549 | #endif
|
---|
[1] | 1550 |
|
---|
| 1551 | SL_REQUIRE (NULL != tempres, _("tempres != NULL"));
|
---|
| 1552 |
|
---|
| 1553 | SL_REQUIRE (sl_drop_privileges() == SL_ENONE,
|
---|
| 1554 | _("sl_drop_privileges() == SL_ENONE"));
|
---|
[227] | 1555 | #if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
|
---|
| 1556 | free(buffer);
|
---|
| 1557 | #endif
|
---|
[1] | 1558 | }
|
---|
[412] | 1559 | #endif
|
---|
[1] | 1560 | SL_IRETURN(SL_ENONE, _("sl_policy_get_user"));
|
---|
| 1561 | }
|
---|
| 1562 |
|
---|
| 1563 |
|
---|
| 1564 |
|
---|
| 1565 | /* ----------------------------------------------------------------
|
---|
| 1566 | *
|
---|
| 1567 | * File access routines
|
---|
| 1568 | *
|
---|
| 1569 | * ---------------------------------------------------------------- */
|
---|
| 1570 |
|
---|
| 1571 | #define TOFFSET 0x1234
|
---|
| 1572 |
|
---|
| 1573 | /* this would prevent opening files if the first 16 fds are open :( */
|
---|
| 1574 | /* #define MAXFD FOPEN_MAX */
|
---|
| 1575 |
|
---|
| 1576 | #define MAXFD 1024
|
---|
| 1577 |
|
---|
| 1578 | typedef struct openfiles {
|
---|
[248] | 1579 | SL_TICKET ticket; /* The unique ID. */
|
---|
| 1580 | int fd; /* The file descriptor. */
|
---|
[252] | 1581 | FILE * stream; /* The file descriptor. */
|
---|
[248] | 1582 | char * path; /* The file path. */
|
---|
| 1583 | int flush; /* Whether we want to flush the cache */
|
---|
| 1584 | char ofile[SL_OFILE_SIZE]; /* origin file */
|
---|
| 1585 | int oline; /* origin line */
|
---|
| 1586 | sh_string * content; /* The file content */
|
---|
[1] | 1587 | } SL_OFILE;
|
---|
| 1588 |
|
---|
| 1589 | static SL_OFILE * ofiles[MAXFD];
|
---|
| 1590 |
|
---|
[248] | 1591 | static char stale_orig_file[64] = { '\0' };
|
---|
| 1592 | static int stale_orig_line = -1;
|
---|
| 1593 | static char stale_orig_mesg[128];
|
---|
| 1594 |
|
---|
[252] | 1595 | static char badfd_orig_file[64] = { '\0' };
|
---|
| 1596 | static int badfd_orig_line = -1;
|
---|
| 1597 | static char badfd_orig_mesg[128];
|
---|
| 1598 |
|
---|
[1] | 1599 |
|
---|
[248] | 1600 | char * sl_check_stale()
|
---|
| 1601 | {
|
---|
| 1602 | if (stale_orig_line == -1)
|
---|
| 1603 | return NULL;
|
---|
| 1604 | sl_snprintf(stale_orig_mesg, sizeof(stale_orig_mesg),
|
---|
| 1605 | _("stale handle, %s, %d"), stale_orig_file, stale_orig_line);
|
---|
| 1606 | stale_orig_file[0] = '\0';
|
---|
| 1607 | stale_orig_line = -1;
|
---|
| 1608 | return stale_orig_mesg;
|
---|
| 1609 | }
|
---|
| 1610 |
|
---|
[252] | 1611 | char * sl_check_badfd()
|
---|
| 1612 | {
|
---|
| 1613 | if (badfd_orig_line == -1)
|
---|
| 1614 | return NULL;
|
---|
| 1615 | sl_snprintf(badfd_orig_mesg, sizeof(badfd_orig_mesg),
|
---|
| 1616 | _("close on file descriptor with allocated handle, %s, %d"),
|
---|
| 1617 | badfd_orig_file, badfd_orig_line);
|
---|
| 1618 | badfd_orig_file[0] = '\0';
|
---|
| 1619 | badfd_orig_line = -1;
|
---|
| 1620 | return badfd_orig_mesg;
|
---|
| 1621 | }
|
---|
| 1622 |
|
---|
[318] | 1623 | typedef struct { volatile unsigned int atom; } atomic_t;
|
---|
| 1624 | static atomic_t nonce_counter = { TOFFSET };
|
---|
| 1625 |
|
---|
| 1626 | #if defined(__GNUC__) && (defined(__i486__) || defined(__x86_64__))
|
---|
| 1627 | /* from linux/include/asm-i386/atomic.h */
|
---|
| 1628 | static unsigned int atomic_add ( unsigned int i, atomic_t *var)
|
---|
| 1629 | {
|
---|
| 1630 | unsigned int j = i;
|
---|
| 1631 |
|
---|
| 1632 | __asm__ __volatile__ ("lock; xaddl %0, %1"
|
---|
| 1633 | : "+r" (i), "+m" (var->atom)
|
---|
| 1634 | : : "memory");
|
---|
| 1635 | return j+i;
|
---|
| 1636 | }
|
---|
| 1637 | #else
|
---|
| 1638 | SH_MUTEX_STATIC(mutex_ticket, PTHREAD_MUTEX_INITIALIZER);
|
---|
| 1639 |
|
---|
| 1640 | static unsigned int atomic_add ( unsigned int i, atomic_t *var)
|
---|
| 1641 | {
|
---|
| 1642 | volatile unsigned int j;
|
---|
| 1643 |
|
---|
| 1644 | SH_MUTEX_LOCK_UNSAFE(mutex_ticket);
|
---|
| 1645 | var->atom += i;
|
---|
| 1646 | j = var->atom;
|
---|
| 1647 | SH_MUTEX_UNLOCK_UNSAFE(mutex_ticket);
|
---|
| 1648 |
|
---|
| 1649 | return j;
|
---|
| 1650 | }
|
---|
| 1651 | #endif
|
---|
| 1652 |
|
---|
[1] | 1653 | static
|
---|
| 1654 | SL_TICKET sl_create_ticket (unsigned int myindex)
|
---|
| 1655 | {
|
---|
| 1656 | unsigned int high; /* index */
|
---|
| 1657 | unsigned int low; /* nonce */
|
---|
[144] | 1658 | SL_TICKET retval = SL_EINTERNAL;
|
---|
[318] | 1659 | unsigned int nonce;/* nonce */
|
---|
[1] | 1660 |
|
---|
| 1661 | SL_ENTER(_("sl_create_ticket"));
|
---|
| 1662 |
|
---|
[144] | 1663 | if (myindex >= MAXFD)
|
---|
[243] | 1664 | {
|
---|
| 1665 | retval = SL_EINTERNAL01;
|
---|
| 1666 | goto out_ticket;
|
---|
| 1667 | }
|
---|
[1] | 1668 |
|
---|
| 1669 | /* mask out the high bit and check that it is not used
|
---|
| 1670 | * -> verify that it fits into 16 bits as positive
|
---|
| 1671 | */
|
---|
| 1672 | high = (myindex + TOFFSET) & 0x7fff;
|
---|
| 1673 |
|
---|
[243] | 1674 | if (high != myindex + TOFFSET)
|
---|
| 1675 | {
|
---|
| 1676 | retval = SL_EINTERNAL02;
|
---|
| 1677 | goto out_ticket;
|
---|
| 1678 | }
|
---|
[1] | 1679 |
|
---|
[318] | 1680 | nonce = atomic_add(1, &nonce_counter);
|
---|
[144] | 1681 |
|
---|
[318] | 1682 | /* Wrap around the nonce counter.
|
---|
| 1683 | * This is a dirty trick.
|
---|
| 1684 | */
|
---|
| 1685 | if (nonce > 0x7fff)
|
---|
| 1686 | {
|
---|
| 1687 | nonce_counter.atom = TOFFSET;
|
---|
| 1688 | nonce = atomic_add(1, &nonce_counter);
|
---|
| 1689 | }
|
---|
[1] | 1690 |
|
---|
[318] | 1691 | low = nonce & 0xffff;
|
---|
| 1692 |
|
---|
[1] | 1693 | /* Overflow -> nonce too big.
|
---|
| 1694 | */
|
---|
[318] | 1695 | if ((low != nonce) || low == 0)
|
---|
[243] | 1696 | {
|
---|
| 1697 | retval = SL_EINTERNAL03;
|
---|
| 1698 | goto out_ticket;
|
---|
| 1699 | }
|
---|
[1] | 1700 |
|
---|
[144] | 1701 | retval = (SL_TICKET) ((high << 16) | low);
|
---|
| 1702 |
|
---|
| 1703 | out_ticket:
|
---|
| 1704 | SL_RETURN (retval, _("sl_create_ticket"));
|
---|
[1] | 1705 | }
|
---|
| 1706 |
|
---|
| 1707 | static
|
---|
| 1708 | int sl_read_ticket (SL_TICKET fno)
|
---|
| 1709 | {
|
---|
| 1710 | register unsigned myindex;
|
---|
| 1711 | register SL_OFILE *of;
|
---|
| 1712 |
|
---|
| 1713 | myindex = ((fno >> 16) & 0xffff) - TOFFSET;
|
---|
| 1714 | if (myindex >= MAXFD)
|
---|
| 1715 | return (SL_ETICKET);
|
---|
| 1716 |
|
---|
| 1717 | if (ofiles[myindex] == NULL)
|
---|
| 1718 | return (SL_ETICKET);
|
---|
| 1719 |
|
---|
| 1720 | if (ofiles[myindex]->ticket != fno)
|
---|
| 1721 | return (SL_ETICKET);
|
---|
| 1722 |
|
---|
| 1723 | if ((of = ofiles[myindex])->fd < 0 || of->fd >= MAXFD )
|
---|
[243] | 1724 | return (SL_EINTERNAL04);
|
---|
[1] | 1725 |
|
---|
| 1726 | if (((of->ticket) & 0xffff) == 0)
|
---|
[243] | 1727 | return (SL_EINTERNAL05);
|
---|
[1] | 1728 |
|
---|
| 1729 | return (myindex);
|
---|
| 1730 | }
|
---|
| 1731 |
|
---|
[248] | 1732 | SL_TICKET sl_make_ticket (const char * ofile, int oline,
|
---|
[252] | 1733 | int fd, const char * filename, FILE * stream)
|
---|
[1] | 1734 | {
|
---|
[22] | 1735 | size_t len;
|
---|
[1] | 1736 | SL_TICKET ticket;
|
---|
| 1737 | SL_ENTER(_("sl_make_ticket"));
|
---|
| 1738 | /* Make entry.
|
---|
| 1739 | */
|
---|
| 1740 | if (fd >= MAXFD || fd < 0)
|
---|
| 1741 | {
|
---|
| 1742 | SL_IRETURN(SL_TOOMANY, _("sl_make_ticket"));
|
---|
| 1743 | }
|
---|
| 1744 |
|
---|
[248] | 1745 | if (ofiles[fd] != NULL) /* stale entry */
|
---|
[1] | 1746 | {
|
---|
[248] | 1747 | /* SL_IRETURN(SL_EINTERNAL06, _("sl_make_ticket")); */
|
---|
| 1748 | sl_strlcpy(stale_orig_file, ofiles[fd]->ofile, sizeof(stale_orig_file));
|
---|
| 1749 | stale_orig_line = ofiles[fd]->oline;
|
---|
| 1750 |
|
---|
| 1751 | if (ofiles[fd]->content)
|
---|
| 1752 | sh_string_destroy(&(ofiles[fd]->content));
|
---|
| 1753 | (void) free (ofiles[fd]->path);
|
---|
| 1754 | (void) free (ofiles[fd]);
|
---|
| 1755 | ofiles[fd] = NULL;
|
---|
[1] | 1756 | }
|
---|
| 1757 |
|
---|
| 1758 | if ( (ofiles[fd] = (SL_OFILE *) malloc(sizeof(SL_OFILE))) == NULL)
|
---|
| 1759 | {
|
---|
| 1760 | SL_IRETURN(SL_EMEM, _("sl_make_ticket"));
|
---|
| 1761 | }
|
---|
| 1762 |
|
---|
[22] | 1763 | len = sl_strlen(filename)+1;
|
---|
| 1764 |
|
---|
| 1765 | if ( (ofiles[fd]->path = (char *) malloc(len) ) == NULL)
|
---|
[1] | 1766 | {
|
---|
[247] | 1767 | free (ofiles[fd]);
|
---|
[1] | 1768 | ofiles[fd] = NULL;
|
---|
| 1769 | SL_IRETURN(SL_EMEM, _("sl_make_ticket"));
|
---|
| 1770 | }
|
---|
| 1771 |
|
---|
| 1772 | /* Get a ticket.
|
---|
| 1773 | */
|
---|
| 1774 | ticket = sl_create_ticket((unsigned int)fd);
|
---|
| 1775 |
|
---|
| 1776 | if (SL_ISERROR(ticket))
|
---|
| 1777 | {
|
---|
| 1778 | (void) free (ofiles[fd]->path);
|
---|
| 1779 | (void) free (ofiles[fd]);
|
---|
[247] | 1780 | ofiles[fd] = NULL;
|
---|
[1] | 1781 | SL_IRETURN(ticket, _("sl_make_ticket"));
|
---|
| 1782 | }
|
---|
| 1783 |
|
---|
[22] | 1784 | sl_strlcpy (ofiles[fd]->path, filename, len);
|
---|
[167] | 1785 | ofiles[fd]->ticket = ticket;
|
---|
| 1786 | ofiles[fd]->fd = fd;
|
---|
| 1787 | ofiles[fd]->content = NULL;
|
---|
[252] | 1788 | ofiles[fd]->stream = stream;
|
---|
[196] | 1789 | ofiles[fd]->flush = SL_FALSE;
|
---|
[1] | 1790 |
|
---|
[248] | 1791 | sl_strlcpy(ofiles[fd]->ofile, ofile, SL_OFILE_SIZE);
|
---|
| 1792 | ofiles[fd]->oline = oline;
|
---|
| 1793 |
|
---|
[1] | 1794 | SL_IRETURN(ticket, _("sl_make_ticket"));
|
---|
| 1795 | }
|
---|
| 1796 |
|
---|
| 1797 | #define SL_OPEN_MIN 113
|
---|
| 1798 | #define SL_OPEN_FOR_READ 113
|
---|
| 1799 | #define SL_OPEN_FOR_WRITE 114
|
---|
| 1800 | #define SL_OPEN_FOR_RDWR 115
|
---|
| 1801 | #define SL_OPEN_FOR_WTRUNC 116
|
---|
| 1802 | #define SL_OPEN_FOR_RWTRUNC 117
|
---|
| 1803 | #define SL_OPEN_SAFE_RDWR 118
|
---|
| 1804 | #define SL_OPEN_FOR_FASTREAD 119
|
---|
| 1805 | #define SL_OPEN_MAX 119
|
---|
| 1806 |
|
---|
| 1807 | #if !defined(O_NOATIME)
|
---|
[395] | 1808 | #if defined(__linux__) && (defined(__i386__) || defined(__x86_64__) || defined(__PPC__))
|
---|
[1] | 1809 | #define O_NOATIME 01000000
|
---|
| 1810 | #else
|
---|
| 1811 | /*
|
---|
| 1812 | * bitwise 'or' with zero does not modify any bit
|
---|
| 1813 | */
|
---|
| 1814 | #define O_NOATIME 0
|
---|
| 1815 | #endif
|
---|
| 1816 | #endif
|
---|
| 1817 |
|
---|
| 1818 | static int o_noatime = O_NOATIME;
|
---|
| 1819 | static mode_t open_mode = (S_IWUSR|S_IRUSR|S_IRGRP);
|
---|
| 1820 |
|
---|
| 1821 |
|
---|
| 1822 | static
|
---|
[248] | 1823 | int sl_open_file (const char * ofile, int oline,
|
---|
| 1824 | const char *filename, int mode, int priv)
|
---|
[1] | 1825 | {
|
---|
| 1826 | struct stat lbuf;
|
---|
| 1827 | struct stat buf;
|
---|
[192] | 1828 | int errval = 0;
|
---|
[1] | 1829 | int lstat_return;
|
---|
| 1830 | int stat_return;
|
---|
| 1831 | int fd;
|
---|
| 1832 | int sflags;
|
---|
[22] | 1833 | size_t len;
|
---|
[1] | 1834 | SL_TICKET ticket;
|
---|
| 1835 |
|
---|
| 1836 | #if !defined(O_NONBLOCK)
|
---|
| 1837 | #if defined(O_NDELAY)
|
---|
| 1838 | #define O_NONBLOCK O_NDELAY
|
---|
| 1839 | #else
|
---|
| 1840 | #define O_NONBLOCK 0
|
---|
| 1841 | #endif
|
---|
| 1842 | #endif
|
---|
| 1843 |
|
---|
| 1844 | SL_ENTER(_("sl_open_file"));
|
---|
| 1845 |
|
---|
| 1846 | if (filename == NULL)
|
---|
| 1847 | SL_IRETURN(SL_ENULL, _("sl_open_file"));
|
---|
| 1848 | if (mode < SL_OPEN_MIN || mode > SL_OPEN_MAX)
|
---|
[243] | 1849 | SL_IRETURN(SL_EINTERNAL07, _("sl_open_file"));
|
---|
[1] | 1850 |
|
---|
| 1851 | /* "This system call always succeeds and the previous value of
|
---|
| 1852 | * the mask is returned."
|
---|
| 1853 | */
|
---|
[252] | 1854 | (void) umask (0);
|
---|
[1] | 1855 |
|
---|
| 1856 | if (mode == SL_OPEN_FOR_FASTREAD)
|
---|
| 1857 | {
|
---|
| 1858 | fd = aud_open_noatime (FIL__, __LINE__, priv, filename,
|
---|
| 1859 | O_RDONLY|O_NONBLOCK, 0, &o_noatime);
|
---|
[8] | 1860 | /*
|
---|
[1] | 1861 | if (fd >= 0) {
|
---|
| 1862 | sflags = retry_fcntl(FIL__, __LINE__, fd, F_GETFL, 0);
|
---|
| 1863 | retry_fcntl(FIL__, __LINE__, fd, F_SETFL, sflags & ~O_NONBLOCK);
|
---|
| 1864 | }
|
---|
[8] | 1865 | */
|
---|
[1] | 1866 | if (fd < 0)
|
---|
| 1867 | SL_IRETURN(SL_EBADFILE, _("sl_open_file"));
|
---|
| 1868 | goto createTicket;
|
---|
| 1869 | }
|
---|
| 1870 |
|
---|
| 1871 | #ifdef USE_SUID
|
---|
| 1872 | if (priv == SL_YESPRIV)
|
---|
| 1873 | sl_set_suid();
|
---|
| 1874 | #endif
|
---|
| 1875 | if (mode == SL_OPEN_FOR_READ)
|
---|
| 1876 | lstat_return = retry_stat (FIL__, __LINE__, filename, &lbuf);
|
---|
| 1877 | else
|
---|
| 1878 | lstat_return = retry_lstat(FIL__, __LINE__, filename, &lbuf);
|
---|
[192] | 1879 | errval = errno;
|
---|
[1] | 1880 | #ifdef USE_SUID
|
---|
| 1881 | if (priv == SL_YESPRIV)
|
---|
| 1882 | sl_unset_suid();
|
---|
| 1883 | #endif
|
---|
| 1884 |
|
---|
| 1885 | if (lstat_return == -1)
|
---|
| 1886 | {
|
---|
| 1887 | lstat_return = ENOENT;
|
---|
| 1888 | if ( (mode == SL_OPEN_FOR_READ && lstat_return == ENOENT) ||
|
---|
[192] | 1889 | (errval != ENOENT))
|
---|
[1] | 1890 | {
|
---|
| 1891 | TPT(( 0, FIL__, __LINE__, _("msg=<lstat: %s> errno=<%d>\n"),
|
---|
[192] | 1892 | filename, errval));
|
---|
| 1893 | errno = errval;
|
---|
| 1894 | SL_IRETURN(SL_ESTAT, _("sl_open_file"));
|
---|
[1] | 1895 | }
|
---|
| 1896 | }
|
---|
| 1897 |
|
---|
| 1898 | if ( (mode != SL_OPEN_FOR_READ) && (lstat_return != ENOENT) &&
|
---|
| 1899 | ( S_ISDIR(lbuf.st_mode) || (S_IWOTH & lbuf.st_mode) )
|
---|
| 1900 | )
|
---|
[192] | 1901 | {
|
---|
| 1902 | int retval = S_ISDIR(lbuf.st_mode) ? SL_EISDIR : SL_EBADOTH;
|
---|
| 1903 | errno = 0;
|
---|
| 1904 | SL_IRETURN(retval, _("sl_open_file"));
|
---|
| 1905 | }
|
---|
[1] | 1906 |
|
---|
| 1907 | /* O_NOATIME has an effect for read(). But write() ?.
|
---|
| 1908 | */
|
---|
| 1909 | switch (mode)
|
---|
| 1910 | {
|
---|
| 1911 | case SL_OPEN_FOR_READ:
|
---|
| 1912 | fd = aud_open_noatime (FIL__, __LINE__, priv, filename,
|
---|
| 1913 | O_RDONLY|O_NONBLOCK, 0, &o_noatime);
|
---|
[192] | 1914 | errval = errno;
|
---|
[1] | 1915 | if (fd >= 0) {
|
---|
| 1916 | sflags = retry_fcntl(FIL__, __LINE__, fd, F_GETFL, 0);
|
---|
| 1917 | retry_fcntl(FIL__, __LINE__, fd, F_SETFL, sflags & ~O_NONBLOCK);
|
---|
| 1918 | }
|
---|
| 1919 | break;
|
---|
| 1920 | case SL_OPEN_FOR_WRITE:
|
---|
| 1921 | if (lstat_return == ENOENT)
|
---|
| 1922 | fd = aud_open (FIL__, __LINE__, priv, filename,
|
---|
| 1923 | O_WRONLY|O_CREAT|O_EXCL, open_mode);
|
---|
| 1924 | else
|
---|
| 1925 | fd = aud_open (FIL__, __LINE__, priv, filename,
|
---|
| 1926 | O_WRONLY, open_mode);
|
---|
[192] | 1927 | errval = errno;
|
---|
[1] | 1928 | break;
|
---|
| 1929 | case SL_OPEN_SAFE_RDWR:
|
---|
| 1930 | if (lstat_return == ENOENT)
|
---|
[192] | 1931 | {
|
---|
| 1932 | fd = aud_open (FIL__, __LINE__, priv, filename,
|
---|
| 1933 | O_RDWR|O_CREAT|O_EXCL, open_mode);
|
---|
| 1934 | errval = errno;
|
---|
| 1935 | }
|
---|
[1] | 1936 | else
|
---|
[192] | 1937 | {
|
---|
| 1938 | errno = errval;
|
---|
| 1939 | SL_IRETURN(SL_EBADFILE, _("sl_open_file"));
|
---|
| 1940 | }
|
---|
[1] | 1941 | break;
|
---|
| 1942 | case SL_OPEN_FOR_RDWR:
|
---|
| 1943 | if (lstat_return == ENOENT)
|
---|
[192] | 1944 | fd = aud_open (FIL__, __LINE__, priv, filename,
|
---|
| 1945 | O_RDWR|O_CREAT|O_EXCL, open_mode);
|
---|
[1] | 1946 | else
|
---|
| 1947 | fd = aud_open (FIL__, __LINE__, priv, filename,
|
---|
| 1948 | O_RDWR, open_mode);
|
---|
[192] | 1949 | errval = errno;
|
---|
[1] | 1950 | break;
|
---|
| 1951 | case SL_OPEN_FOR_WTRUNC:
|
---|
| 1952 | if (lstat_return == ENOENT)
|
---|
| 1953 | fd = aud_open (FIL__, __LINE__, priv, filename,
|
---|
| 1954 | O_WRONLY|O_CREAT|O_EXCL, open_mode);
|
---|
| 1955 | else
|
---|
| 1956 | fd = aud_open (FIL__, __LINE__, priv, filename,
|
---|
| 1957 | O_WRONLY|O_TRUNC, open_mode);
|
---|
[192] | 1958 | errval = errno;
|
---|
[1] | 1959 | break;
|
---|
| 1960 | case SL_OPEN_FOR_RWTRUNC:
|
---|
| 1961 | if (lstat_return == ENOENT)
|
---|
| 1962 | fd = aud_open (FIL__, __LINE__, priv, filename,
|
---|
| 1963 | O_RDWR|O_CREAT|O_EXCL, open_mode);
|
---|
| 1964 | else
|
---|
| 1965 | fd = aud_open (FIL__, __LINE__, priv, filename,
|
---|
| 1966 | O_RDWR|O_TRUNC, open_mode);
|
---|
[192] | 1967 | errval = errno;
|
---|
[1] | 1968 | break;
|
---|
| 1969 | default:
|
---|
[192] | 1970 | errno = 0;
|
---|
[243] | 1971 | SL_IRETURN(SL_EINTERNAL08, _("sl_open_file"));
|
---|
[1] | 1972 | }
|
---|
| 1973 |
|
---|
| 1974 | if (fd < 0)
|
---|
| 1975 | {
|
---|
| 1976 | TPT(( 0, FIL__, __LINE__, _("msg=<Error opening: %s> errno=<%d>\n"),
|
---|
[192] | 1977 | filename, errval));
|
---|
| 1978 | errno = errval;
|
---|
[1] | 1979 | SL_IRETURN(SL_EBADFILE, _("sl_open_file"));
|
---|
| 1980 | }
|
---|
| 1981 |
|
---|
| 1982 | #ifdef USE_SUID
|
---|
| 1983 | if (priv == SL_YESPRIV)
|
---|
| 1984 | sl_set_suid();
|
---|
| 1985 | #endif
|
---|
| 1986 | stat_return = retry_fstat(FIL__, __LINE__, fd, &buf);
|
---|
[192] | 1987 | errval = errno;
|
---|
[1] | 1988 | #ifdef USE_SUID
|
---|
| 1989 | if (priv == SL_YESPRIV)
|
---|
| 1990 | sl_unset_suid();
|
---|
| 1991 | #endif
|
---|
| 1992 |
|
---|
| 1993 | if (stat_return < 0)
|
---|
| 1994 | {
|
---|
[252] | 1995 | sl_close_fd (FIL__, __LINE__, fd);
|
---|
[192] | 1996 | errno = errval;
|
---|
| 1997 | SL_IRETURN(SL_EFSTAT, _("sl_open_file"));
|
---|
[1] | 1998 | }
|
---|
| 1999 |
|
---|
[192] | 2000 | errno = 0;
|
---|
| 2001 |
|
---|
[1] | 2002 | if (lstat_return != ENOENT && buf.st_ino != lbuf.st_ino)
|
---|
| 2003 | {
|
---|
[252] | 2004 | sl_close_fd (FIL__, __LINE__, fd);
|
---|
[1] | 2005 | SL_IRETURN(SL_EBOGUS, _("sl_open_file"));
|
---|
| 2006 | }
|
---|
| 2007 |
|
---|
| 2008 | createTicket:
|
---|
| 2009 |
|
---|
| 2010 | /* Make entry.
|
---|
| 2011 | */
|
---|
| 2012 | if (fd >= MAXFD)
|
---|
| 2013 | {
|
---|
[252] | 2014 | sl_close_fd(FIL__, __LINE__, fd);
|
---|
[1] | 2015 | SL_IRETURN(SL_TOOMANY, _("sl_open_file"));
|
---|
| 2016 | }
|
---|
| 2017 |
|
---|
[248] | 2018 | if (ofiles[fd] != NULL) /* stale entry */
|
---|
[1] | 2019 | {
|
---|
[248] | 2020 | /*
|
---|
[252] | 2021 | sl_close_fd(FIL__, __LINE__, fd);
|
---|
[243] | 2022 | SL_IRETURN(SL_EINTERNAL09, _("sl_open_file"));
|
---|
[248] | 2023 | */
|
---|
| 2024 | sl_strlcpy(stale_orig_file, ofiles[fd]->ofile, sizeof(stale_orig_file));
|
---|
| 2025 | stale_orig_line = ofiles[fd]->oline;
|
---|
| 2026 |
|
---|
| 2027 | if (ofiles[fd]->content)
|
---|
| 2028 | sh_string_destroy(&(ofiles[fd]->content));
|
---|
| 2029 | (void) free (ofiles[fd]->path);
|
---|
| 2030 | (void) free (ofiles[fd]);
|
---|
| 2031 | ofiles[fd] = NULL;
|
---|
[1] | 2032 | }
|
---|
| 2033 |
|
---|
| 2034 | if ( (ofiles[fd] = (SL_OFILE *) malloc(sizeof(SL_OFILE))) == NULL)
|
---|
| 2035 | {
|
---|
[252] | 2036 | sl_close_fd(FIL__, __LINE__, fd);
|
---|
[1] | 2037 | SL_IRETURN(SL_EMEM, _("sl_open_file"));
|
---|
| 2038 | }
|
---|
| 2039 |
|
---|
[22] | 2040 | len = sl_strlen(filename)+1;
|
---|
| 2041 |
|
---|
| 2042 | if ( (ofiles[fd]->path = (char *) malloc(len) ) == NULL)
|
---|
[1] | 2043 | {
|
---|
[247] | 2044 | free (ofiles[fd]);
|
---|
[1] | 2045 | ofiles[fd] = NULL;
|
---|
[252] | 2046 | sl_close_fd(FIL__, __LINE__, fd);
|
---|
[1] | 2047 | SL_IRETURN(SL_EMEM, _("sl_open_file"));
|
---|
| 2048 | }
|
---|
| 2049 |
|
---|
| 2050 | /* Get a ticket.
|
---|
| 2051 | */
|
---|
| 2052 | ticket = sl_create_ticket(fd);
|
---|
| 2053 |
|
---|
| 2054 | if (SL_ISERROR(ticket))
|
---|
| 2055 | {
|
---|
| 2056 | (void) free (ofiles[fd]->path);
|
---|
| 2057 | (void) free (ofiles[fd]);
|
---|
[247] | 2058 | ofiles[fd] = NULL;
|
---|
[252] | 2059 | sl_close_fd(FIL__, __LINE__, fd);
|
---|
[1] | 2060 | SL_IRETURN(ticket, _("sl_open_file"));
|
---|
| 2061 | }
|
---|
| 2062 |
|
---|
[22] | 2063 | sl_strlcpy (ofiles[fd]->path, filename, len);
|
---|
[167] | 2064 | ofiles[fd]->ticket = ticket;
|
---|
| 2065 | ofiles[fd]->fd = fd;
|
---|
| 2066 | ofiles[fd]->content = NULL;
|
---|
[252] | 2067 | ofiles[fd]->stream = NULL;
|
---|
[196] | 2068 | ofiles[fd]->flush = SL_FALSE;
|
---|
[1] | 2069 |
|
---|
[248] | 2070 | sl_strlcpy(ofiles[fd]->ofile, ofile, SL_OFILE_SIZE);
|
---|
| 2071 | ofiles[fd]->oline = oline;
|
---|
| 2072 |
|
---|
[1] | 2073 | SL_IRETURN(ticket, _("sl_open_file"));
|
---|
| 2074 | }
|
---|
| 2075 |
|
---|
[252] | 2076 | FILE * sl_stream (SL_TICKET ticket, char * mode)
|
---|
| 2077 | {
|
---|
| 2078 | int fd;
|
---|
| 2079 |
|
---|
| 2080 | if (SL_ISERROR(fd = sl_read_ticket(ticket)))
|
---|
| 2081 | return (NULL);
|
---|
| 2082 |
|
---|
| 2083 | if (ofiles[fd] == NULL || fd != ofiles[fd]->fd ||
|
---|
| 2084 | ticket != ofiles[fd]->ticket || fd < 0)
|
---|
| 2085 | return (NULL);
|
---|
| 2086 |
|
---|
| 2087 | if (!ofiles[fd]->stream)
|
---|
| 2088 | ofiles[fd]->stream = fdopen(fd, mode);
|
---|
| 2089 |
|
---|
| 2090 | return ofiles[fd]->stream;
|
---|
| 2091 | }
|
---|
| 2092 |
|
---|
[196] | 2093 | int get_the_fd (SL_TICKET ticket)
|
---|
| 2094 | {
|
---|
| 2095 | int fd;
|
---|
| 2096 |
|
---|
| 2097 | if (SL_ISERROR(fd = sl_read_ticket(ticket)))
|
---|
| 2098 | return (fd);
|
---|
| 2099 |
|
---|
[248] | 2100 | if (ofiles[fd] == NULL || fd != ofiles[fd]->fd ||
|
---|
| 2101 | ticket != ofiles[fd]->ticket || fd < 0)
|
---|
[243] | 2102 | return (SL_EINTERNAL10);
|
---|
[248] | 2103 |
|
---|
[196] | 2104 | return (fd);
|
---|
| 2105 | }
|
---|
| 2106 |
|
---|
[1] | 2107 | static
|
---|
[20] | 2108 | int check_fname_priv (const char * fname, int priv)
|
---|
[1] | 2109 | {
|
---|
| 2110 | SL_ENTER(_("check_fname_priv"));
|
---|
| 2111 | if (fname == NULL)
|
---|
| 2112 | SL_IRETURN(SL_ENULL, _("check_fname_priv"));
|
---|
| 2113 | if (priv != SL_YESPRIV && priv != SL_NOPRIV)
|
---|
[243] | 2114 | SL_IRETURN(SL_EINTERNAL11, _("check_fname_priv"));
|
---|
[1] | 2115 | SL_IRETURN(SL_ENONE, _("check_fname_priv"));
|
---|
| 2116 | }
|
---|
| 2117 |
|
---|
[248] | 2118 | SL_TICKET sl_open_write (const char * ofile, int oline,
|
---|
| 2119 | const char * fname, int priv)
|
---|
[1] | 2120 | {
|
---|
| 2121 | long status;
|
---|
| 2122 | SL_ENTER(_("sl_open_write"));
|
---|
| 2123 |
|
---|
| 2124 | if (SL_ENONE != (status = check_fname_priv (fname, priv)))
|
---|
| 2125 | SL_IRETURN(status, _("sl_open_write"));
|
---|
| 2126 |
|
---|
[248] | 2127 | status = sl_open_file(ofile, oline, fname, SL_OPEN_FOR_WRITE, priv);
|
---|
[1] | 2128 | SL_IRETURN(status, _("sl_open_write"));
|
---|
| 2129 | }
|
---|
| 2130 |
|
---|
[248] | 2131 | SL_TICKET sl_open_read (const char * ofile, int oline,
|
---|
| 2132 | const char * fname, int priv)
|
---|
[1] | 2133 | {
|
---|
| 2134 | long status;
|
---|
| 2135 | SL_ENTER(_("sl_open_read"));
|
---|
| 2136 |
|
---|
| 2137 | if (SL_ENONE != (status = check_fname_priv (fname, priv)))
|
---|
| 2138 | {
|
---|
| 2139 | TPT(( 0, FIL__, __LINE__,
|
---|
| 2140 | _("msg=<Error in check_fname_priv.> status=<%ld>\n"),
|
---|
| 2141 | status));
|
---|
| 2142 | SL_IRETURN(status, _("sl_open_read"));
|
---|
| 2143 | }
|
---|
| 2144 |
|
---|
[248] | 2145 | status = sl_open_file(ofile, oline, fname, SL_OPEN_FOR_READ, priv);
|
---|
[1] | 2146 | SL_IRETURN(status, _("sl_open_read"));
|
---|
| 2147 | }
|
---|
| 2148 |
|
---|
[196] | 2149 | #if defined(HAVE_POSIX_FADVISE) && defined(HAVE_MINCORE) && defined(POSIX_FADV_DONTNEED)
|
---|
| 2150 | static int sl_check_mincore(int fd)
|
---|
| 2151 | {
|
---|
| 2152 | /* Idea from Tobias Oetiker (http://insights.oetiker.ch/linux/fadvise.html)
|
---|
| 2153 | */
|
---|
| 2154 | struct stat fbuf;
|
---|
| 2155 | int retval = -1;
|
---|
| 2156 |
|
---|
| 2157 | if (0 == fstat(fd, &fbuf))
|
---|
| 2158 | {
|
---|
| 2159 | void *f_map;
|
---|
| 2160 |
|
---|
| 2161 | f_map = mmap((void *)0, fbuf.st_size, PROT_NONE, MAP_SHARED, fd, 0);
|
---|
| 2162 | if (MAP_FAILED != f_map)
|
---|
| 2163 | {
|
---|
| 2164 | extern int sh_unix_pagesize(void);
|
---|
| 2165 | size_t i;
|
---|
| 2166 | size_t page_size = sh_unix_pagesize();
|
---|
| 2167 | size_t vec_size = (fbuf.st_size+page_size-1)/page_size;
|
---|
| 2168 | unsigned char * vec = calloc(1, vec_size);
|
---|
| 2169 |
|
---|
| 2170 | if (vec)
|
---|
| 2171 | {
|
---|
| 2172 | mincore(f_map, fbuf.st_size, vec);
|
---|
[237] | 2173 | /* imax = fbuf.st_size/page_size; */
|
---|
[196] | 2174 | for (i = 0; i <= vec_size; ++i)
|
---|
| 2175 | {
|
---|
| 2176 | if (vec[i]&1)
|
---|
| 2177 | {
|
---|
| 2178 | goto incore;
|
---|
| 2179 | }
|
---|
| 2180 | }
|
---|
| 2181 | retval = 0;
|
---|
| 2182 | incore:
|
---|
| 2183 | free(vec);
|
---|
| 2184 | }
|
---|
| 2185 | munmap(f_map, fbuf.st_size);
|
---|
| 2186 | }
|
---|
| 2187 | }
|
---|
| 2188 | return retval;
|
---|
| 2189 | }
|
---|
| 2190 | #endif
|
---|
| 2191 |
|
---|
| 2192 | static int sl_drop_cache = SL_FALSE;
|
---|
| 2193 |
|
---|
| 2194 | int sl_set_drop_cache(const char * str)
|
---|
| 2195 | {
|
---|
| 2196 | extern int sh_util_flagval(const char * c, int * fval);
|
---|
| 2197 | return sh_util_flagval(str, &sl_drop_cache);
|
---|
| 2198 | }
|
---|
| 2199 |
|
---|
[248] | 2200 | SL_TICKET sl_open_fastread (const char * ofile, int oline,
|
---|
| 2201 | const char * fname, int priv)
|
---|
[1] | 2202 | {
|
---|
| 2203 | long status;
|
---|
| 2204 | SL_ENTER(_("sl_open_fastread"));
|
---|
| 2205 |
|
---|
| 2206 | if (SL_ENONE != (status = check_fname_priv (fname, priv)))
|
---|
| 2207 | SL_IRETURN(status, _("sl_open_read"));
|
---|
| 2208 |
|
---|
[248] | 2209 | status = sl_open_file(ofile, oline, fname, SL_OPEN_FOR_FASTREAD, priv);
|
---|
[196] | 2210 |
|
---|
| 2211 | #if defined(HAVE_POSIX_FADVISE) && defined(HAVE_MINCORE) && defined(POSIX_FADV_DONTNEED)
|
---|
| 2212 |
|
---|
| 2213 | if (SL_FALSE != sl_drop_cache && !SL_ISERROR(status))
|
---|
| 2214 | {
|
---|
| 2215 | int fd = get_the_fd(status);
|
---|
| 2216 | if (fd >= 0)
|
---|
| 2217 | {
|
---|
| 2218 | if (0 == sl_check_mincore(fd))
|
---|
| 2219 | ofiles[fd]->flush = SL_TRUE;
|
---|
| 2220 | }
|
---|
| 2221 | }
|
---|
| 2222 |
|
---|
| 2223 | #endif
|
---|
| 2224 |
|
---|
[1] | 2225 | SL_IRETURN(status, _("sl_open_fastread"));
|
---|
| 2226 | }
|
---|
| 2227 |
|
---|
[248] | 2228 | SL_TICKET sl_open_rdwr (const char * ofile, int oline,
|
---|
| 2229 | const char * fname, int priv)
|
---|
[1] | 2230 | {
|
---|
| 2231 | long status;
|
---|
| 2232 | SL_ENTER(_("sl_open_rdwr"));
|
---|
| 2233 |
|
---|
| 2234 | if (SL_ENONE != (status = check_fname_priv (fname, priv)))
|
---|
| 2235 | SL_IRETURN(status, _("sl_open_rdwr"));
|
---|
| 2236 |
|
---|
[248] | 2237 | status = sl_open_file(ofile, oline, fname, SL_OPEN_FOR_RDWR, priv);
|
---|
[1] | 2238 | SL_IRETURN(status, _("sl_open_rdwr"));
|
---|
| 2239 | }
|
---|
| 2240 |
|
---|
[248] | 2241 | SL_TICKET sl_open_safe_rdwr (const char * ofile, int oline,
|
---|
| 2242 | const char * fname, int priv)
|
---|
[1] | 2243 | {
|
---|
| 2244 | long status;
|
---|
| 2245 | SL_ENTER(_("sl_open_safe_rdwr"));
|
---|
| 2246 |
|
---|
| 2247 | if (SL_ENONE != (status = check_fname_priv (fname, priv)))
|
---|
| 2248 | SL_IRETURN(status, _("sl_open_safe_rdwr"));
|
---|
| 2249 |
|
---|
[248] | 2250 | status = sl_open_file(ofile, oline, fname, SL_OPEN_SAFE_RDWR, priv);
|
---|
[1] | 2251 | SL_IRETURN(status, _("sl_open_safe_rdwr"));
|
---|
| 2252 | }
|
---|
| 2253 |
|
---|
[248] | 2254 | SL_TICKET sl_open_write_trunc (const char * ofile, int oline,
|
---|
| 2255 | const char * fname, int priv)
|
---|
[1] | 2256 | {
|
---|
| 2257 | long status;
|
---|
| 2258 | SL_ENTER(_("sl_open_write_trunc"));
|
---|
| 2259 |
|
---|
| 2260 | if (SL_ENONE != (status = check_fname_priv (fname, priv)))
|
---|
| 2261 | SL_IRETURN(status, _("sl_open_write_trunc"));
|
---|
| 2262 |
|
---|
[248] | 2263 | status = sl_open_file(ofile, oline, fname, SL_OPEN_FOR_WTRUNC, priv);
|
---|
[1] | 2264 | SL_IRETURN(status, _("sl_open_write_trunc"));
|
---|
| 2265 | }
|
---|
| 2266 |
|
---|
[248] | 2267 | SL_TICKET sl_open_rdwr_trunc (const char * ofile, int oline,
|
---|
| 2268 | const char * fname, int priv)
|
---|
[1] | 2269 | {
|
---|
| 2270 | long status;
|
---|
| 2271 | SL_ENTER(_("sl_open_rdwr_trunc"));
|
---|
| 2272 |
|
---|
| 2273 | if (SL_ENONE != (status = check_fname_priv (fname, priv)))
|
---|
| 2274 | SL_IRETURN(status, _("sl_open_rdwr_trunc"));
|
---|
| 2275 |
|
---|
[248] | 2276 | status = sl_open_file(ofile, oline, fname, SL_OPEN_FOR_RWTRUNC, priv);
|
---|
[1] | 2277 | SL_IRETURN(status, _("sl_open_rdwr_trunc"));
|
---|
| 2278 | }
|
---|
| 2279 |
|
---|
| 2280 |
|
---|
[167] | 2281 | int sl_init_content (SL_TICKET ticket, size_t size)
|
---|
| 2282 | {
|
---|
| 2283 | int fd;
|
---|
| 2284 |
|
---|
| 2285 | if (SL_ISERROR(fd = sl_read_ticket(ticket)))
|
---|
| 2286 | return (fd);
|
---|
| 2287 |
|
---|
[248] | 2288 | if (ofiles[fd] == NULL || fd != ofiles[fd]->fd ||
|
---|
| 2289 | ticket != ofiles[fd]->ticket || fd < 0)
|
---|
[243] | 2290 | return (SL_EINTERNAL12);
|
---|
[167] | 2291 |
|
---|
| 2292 | if (ofiles[fd]->content)
|
---|
| 2293 | sh_string_destroy(&(ofiles[fd]->content));
|
---|
| 2294 | ofiles[fd]->content = sh_string_new(size);
|
---|
| 2295 |
|
---|
| 2296 | return SL_ENONE;
|
---|
| 2297 | }
|
---|
| 2298 |
|
---|
| 2299 | sh_string * sl_get_content (SL_TICKET ticket)
|
---|
| 2300 | {
|
---|
| 2301 | int fd;
|
---|
| 2302 |
|
---|
| 2303 | if (SL_ISERROR(fd = sl_read_ticket(ticket)))
|
---|
| 2304 | return (NULL);
|
---|
| 2305 |
|
---|
[248] | 2306 | if (ofiles[fd] == NULL || fd != ofiles[fd]->fd ||
|
---|
| 2307 | ticket != ofiles[fd]->ticket || fd < 0)
|
---|
[167] | 2308 | return (NULL);
|
---|
| 2309 |
|
---|
| 2310 | return (ofiles[fd]->content);
|
---|
| 2311 | }
|
---|
| 2312 |
|
---|
[212] | 2313 | int sl_lock (SL_TICKET ticket)
|
---|
| 2314 | {
|
---|
| 2315 | int fd;
|
---|
| 2316 | struct flock lock;
|
---|
| 2317 | int retval;
|
---|
| 2318 |
|
---|
| 2319 | SL_ENTER(_("sl_lock"));
|
---|
| 2320 |
|
---|
| 2321 | if (SL_ISERROR(fd = get_the_fd (ticket)))
|
---|
| 2322 | SL_IRETURN(fd, _("sl_lock"));
|
---|
| 2323 |
|
---|
| 2324 | lock.l_type = F_WRLCK;
|
---|
| 2325 | lock.l_whence = SEEK_SET;
|
---|
| 2326 | lock.l_start = 0;
|
---|
| 2327 | lock.l_len = 0;
|
---|
| 2328 |
|
---|
| 2329 | /* F_SETLK returns if the lock cannot be obtained */
|
---|
| 2330 | do {
|
---|
| 2331 | retval = fcntl(fd, F_SETLK, &lock);
|
---|
| 2332 | } while (retval < 0 && errno == EINTR);
|
---|
| 2333 |
|
---|
| 2334 | if (retval < 0 && errno == EBADF)
|
---|
| 2335 | SL_IRETURN(SL_ETICKET, _("sl_lock"));
|
---|
| 2336 | else if (retval < 0)
|
---|
| 2337 | SL_IRETURN(SL_EBADFILE, _("sl_lock"));
|
---|
| 2338 | else
|
---|
| 2339 | SL_IRETURN(SL_ENONE, _("sl_lock"));
|
---|
| 2340 | }
|
---|
| 2341 |
|
---|
[1] | 2342 | int sl_close (SL_TICKET ticket)
|
---|
| 2343 | {
|
---|
| 2344 | register int fd;
|
---|
[252] | 2345 | FILE * fp = NULL;
|
---|
[1] | 2346 |
|
---|
| 2347 | SL_ENTER(_("sl_close"));
|
---|
| 2348 |
|
---|
| 2349 | if (SL_ISERROR(fd = get_the_fd (ticket)))
|
---|
| 2350 | SL_IRETURN(fd, _("sl_close"));
|
---|
| 2351 |
|
---|
[247] | 2352 | if (ofiles[fd] != NULL)
|
---|
| 2353 | {
|
---|
[196] | 2354 | #if defined(HAVE_POSIX_FADVISE) && defined(HAVE_MINCORE) && defined(POSIX_FADV_DONTNEED)
|
---|
[247] | 2355 | if (ofiles[fd]->flush == SL_TRUE)
|
---|
| 2356 | {
|
---|
| 2357 | posix_fadvise(fd, 0, 0, POSIX_FADV_DONTNEED);
|
---|
| 2358 | }
|
---|
| 2359 | #endif
|
---|
| 2360 | if (ofiles[fd]->content)
|
---|
| 2361 | sh_string_destroy(&(ofiles[fd]->content));
|
---|
| 2362 | (void) free (ofiles[fd]->path);
|
---|
[252] | 2363 | fp = ofiles[fd]->stream;
|
---|
[247] | 2364 | (void) free (ofiles[fd]);
|
---|
| 2365 | ofiles[fd] = NULL;
|
---|
[196] | 2366 | }
|
---|
| 2367 |
|
---|
[1] | 2368 | /* This may fail, but what to do then ?
|
---|
| 2369 | */
|
---|
[252] | 2370 | if (fp)
|
---|
[1] | 2371 | {
|
---|
[252] | 2372 | if (0 != fclose (fp)) /* within sl_close */
|
---|
| 2373 | {
|
---|
| 2374 | TPT((0, FIL__, __LINE__,
|
---|
| 2375 | _("msg=<Error fclosing file.>, fd=<%d>, err=<%s>\n"),
|
---|
| 2376 | fd, strerror(errno)));
|
---|
| 2377 | }
|
---|
[1] | 2378 | }
|
---|
[252] | 2379 | else
|
---|
| 2380 | {
|
---|
| 2381 | if (0 != close(fd)) /* within sl_close */
|
---|
| 2382 | {
|
---|
| 2383 | TPT((0, FIL__, __LINE__,
|
---|
| 2384 | _("msg=<Error closing file.>, fd=<%d>, err=<%s>\n"),
|
---|
| 2385 | fd, strerror(errno)));
|
---|
| 2386 | }
|
---|
| 2387 | }
|
---|
[1] | 2388 |
|
---|
| 2389 | SL_IRETURN(SL_ENONE, _("sl_close"));
|
---|
| 2390 | }
|
---|
| 2391 |
|
---|
[252] | 2392 | int sl_close_fd (const char * file, int line, int fd)
|
---|
| 2393 | {
|
---|
| 2394 | int ret = -1;
|
---|
| 2395 |
|
---|
| 2396 | SL_ENTER(_("sl_close_fd"));
|
---|
| 2397 |
|
---|
| 2398 | if (fd >= 0 && fd < MAXFD && ofiles[fd] != NULL) /* stale ofiles[fd] handle */
|
---|
| 2399 | {
|
---|
| 2400 | sl_strlcpy(badfd_orig_file, file, sizeof(badfd_orig_file));
|
---|
| 2401 | badfd_orig_line = line;
|
---|
| 2402 | }
|
---|
| 2403 |
|
---|
| 2404 | ret = close(fd); /* within sl_close_fd wrapper */
|
---|
| 2405 |
|
---|
| 2406 | SL_IRETURN(ret, _("sl_close_fd"));
|
---|
| 2407 | }
|
---|
| 2408 |
|
---|
| 2409 | int sl_fclose (const char * file, int line, FILE * fp)
|
---|
| 2410 | {
|
---|
| 2411 | int ret = -1;
|
---|
| 2412 | int fd;
|
---|
| 2413 |
|
---|
| 2414 | SL_ENTER(_("sl_fclose"));
|
---|
| 2415 |
|
---|
| 2416 | fd = fileno(fp);
|
---|
| 2417 |
|
---|
| 2418 | if (fd >= 0 && fd < MAXFD && ofiles[fd] != NULL) /* stale ofiles[fd] handle */
|
---|
| 2419 | {
|
---|
| 2420 | sl_strlcpy(badfd_orig_file, file, sizeof(badfd_orig_file));
|
---|
| 2421 | badfd_orig_line = line;
|
---|
| 2422 | }
|
---|
| 2423 |
|
---|
| 2424 | ret = fclose(fp); /* within sl_fclose wrapper */
|
---|
| 2425 |
|
---|
| 2426 | SL_IRETURN(ret, _("sl_fclose"));
|
---|
| 2427 | }
|
---|
| 2428 |
|
---|
[1] | 2429 | int sl_dropall(int fd, int except)
|
---|
| 2430 | {
|
---|
| 2431 | while (fd < MAXFD)
|
---|
| 2432 | {
|
---|
| 2433 | if (ofiles[fd] != NULL && fd != except)
|
---|
| 2434 | {
|
---|
[167] | 2435 | if (ofiles[fd]->content)
|
---|
| 2436 | sh_string_destroy(&(ofiles[fd]->content));
|
---|
[1] | 2437 | if (ofiles[fd]->path != NULL)
|
---|
[247] | 2438 | (void) free (ofiles[fd]->path);
|
---|
| 2439 | (void) free (ofiles[fd]);
|
---|
[1] | 2440 | ofiles[fd] = NULL;
|
---|
| 2441 | }
|
---|
| 2442 | ++fd;
|
---|
| 2443 | }
|
---|
| 2444 | return 0;
|
---|
| 2445 | }
|
---|
| 2446 |
|
---|
[174] | 2447 | int sl_dropall_dirty(int fd, int except)
|
---|
| 2448 | {
|
---|
| 2449 | while (fd < MAXFD)
|
---|
| 2450 | {
|
---|
| 2451 | if (ofiles[fd] != NULL && fd != except)
|
---|
| 2452 | {
|
---|
| 2453 | ofiles[fd] = NULL;
|
---|
| 2454 | }
|
---|
| 2455 | ++fd;
|
---|
| 2456 | }
|
---|
| 2457 | return 0;
|
---|
| 2458 | }
|
---|
[1] | 2459 |
|
---|
[174] | 2460 |
|
---|
[1] | 2461 | int sl_unlink (SL_TICKET ticket)
|
---|
| 2462 | {
|
---|
| 2463 | register int fd;
|
---|
| 2464 |
|
---|
| 2465 | SL_ENTER(_("sl_unlink"));
|
---|
| 2466 |
|
---|
| 2467 | if (SL_ISERROR(fd = get_the_fd(ticket)))
|
---|
| 2468 | SL_IRETURN(fd, _("sl_unlink"));
|
---|
| 2469 |
|
---|
| 2470 | if (retry_aud_unlink(FIL__, __LINE__, ofiles[fd]->path) < 0)
|
---|
| 2471 | SL_IRETURN(SL_EUNLINK, _("sl_unlink"));
|
---|
| 2472 |
|
---|
| 2473 | SL_IRETURN(SL_ENONE, _("sl_unlink"));
|
---|
| 2474 | }
|
---|
| 2475 |
|
---|
| 2476 |
|
---|
| 2477 | int sl_seek (SL_TICKET ticket, off_t off_data)
|
---|
| 2478 | {
|
---|
| 2479 | register int fd;
|
---|
| 2480 |
|
---|
| 2481 | SL_ENTER(_("sl_seek"));
|
---|
| 2482 |
|
---|
| 2483 | if (SL_ISERROR(fd = get_the_fd(ticket)))
|
---|
| 2484 | SL_IRETURN(fd, _("sl_seek"));
|
---|
| 2485 |
|
---|
| 2486 | if (lseek(fd, off_data, SEEK_SET) == (off_t)-1)
|
---|
| 2487 | SL_IRETURN(SL_EREWIND, _("sl_seek"));
|
---|
| 2488 |
|
---|
| 2489 | SL_IRETURN(SL_ENONE, _("sl_seek"));
|
---|
| 2490 | }
|
---|
| 2491 |
|
---|
| 2492 | int sl_rewind (SL_TICKET ticket)
|
---|
| 2493 | {
|
---|
| 2494 | register int fd;
|
---|
| 2495 |
|
---|
| 2496 | SL_ENTER(_("sl_rewind"));
|
---|
| 2497 |
|
---|
| 2498 | if (SL_ISERROR(fd = get_the_fd(ticket)))
|
---|
| 2499 | SL_IRETURN(fd, _("sl_rewind"));
|
---|
| 2500 |
|
---|
| 2501 | if (lseek (fd, 0L, SEEK_SET) == (off_t)-1)
|
---|
| 2502 | SL_IRETURN(SL_EREWIND, _("sl_rewind"));
|
---|
| 2503 |
|
---|
| 2504 | SL_IRETURN(SL_ENONE, _("sl_rewind"));
|
---|
| 2505 | }
|
---|
| 2506 |
|
---|
| 2507 | int sl_forward (SL_TICKET ticket)
|
---|
| 2508 | {
|
---|
| 2509 | register int fd;
|
---|
| 2510 |
|
---|
| 2511 | SL_ENTER(_("sl_forward"));
|
---|
| 2512 |
|
---|
| 2513 | if (SL_ISERROR(fd = get_the_fd(ticket)))
|
---|
| 2514 | SL_IRETURN(fd, _("sl_forward"));
|
---|
| 2515 |
|
---|
| 2516 | if (lseek (fd, 0L, SEEK_END) == (off_t)-1)
|
---|
| 2517 | SL_IRETURN(SL_EFORWARD, _("sl_forward"));
|
---|
| 2518 |
|
---|
| 2519 | SL_IRETURN(SL_ENONE, _("sl_forward"));
|
---|
| 2520 | }
|
---|
| 2521 |
|
---|
| 2522 |
|
---|
| 2523 | int sl_sync (SL_TICKET ticket)
|
---|
| 2524 | {
|
---|
| 2525 | register int fd;
|
---|
| 2526 |
|
---|
| 2527 | SL_ENTER(_("sl_sync"));
|
---|
| 2528 |
|
---|
| 2529 | if (SL_ISERROR(fd = get_the_fd(ticket)))
|
---|
| 2530 | SL_IRETURN(fd, _("sl_sync"));
|
---|
| 2531 |
|
---|
| 2532 | if (fsync (fd) == -1)
|
---|
| 2533 | SL_IRETURN(SL_ESYNC, _("sl_sync"));
|
---|
| 2534 |
|
---|
| 2535 | SL_IRETURN(SL_ENONE, _("sl_sync"));
|
---|
| 2536 | }
|
---|
| 2537 |
|
---|
[8] | 2538 | int sl_read_timeout_prep (SL_TICKET ticket)
|
---|
| 2539 | {
|
---|
| 2540 | int fd;
|
---|
| 2541 | int sflags;
|
---|
[1] | 2542 |
|
---|
[8] | 2543 | SL_ENTER(_("sl_read_timeout_prep"));
|
---|
| 2544 |
|
---|
| 2545 | if (SL_ISERROR(fd = get_the_fd(ticket)))
|
---|
| 2546 | {
|
---|
| 2547 | TPT(( 0, FIL__, __LINE__, _("msg=<ticket error> errno=<%d>"), fd));
|
---|
| 2548 | SL_IRETURN(fd, _("sl_read_timeout_prep"));
|
---|
| 2549 | }
|
---|
| 2550 |
|
---|
| 2551 | /* set to non-blocking mode
|
---|
| 2552 | */
|
---|
| 2553 | sflags = retry_fcntl(FIL__, __LINE__, fd, F_GETFL, 0);
|
---|
| 2554 | retry_fcntl(FIL__, __LINE__, fd, F_SETFL, sflags | O_NONBLOCK);
|
---|
| 2555 |
|
---|
| 2556 | SL_IRETURN(SL_ENONE, _("sl_read_timeout_prep"));
|
---|
| 2557 | }
|
---|
| 2558 |
|
---|
[131] | 2559 |
|
---|
| 2560 | int sl_read_timeout_fd (int fd, void * buf_in, size_t count,
|
---|
| 2561 | int timeout, int is_nonblocking)
|
---|
[1] | 2562 | {
|
---|
[137] | 2563 | int sflags = 0;
|
---|
[1] | 2564 | fd_set readfds;
|
---|
| 2565 | struct timeval tv;
|
---|
[8] | 2566 | /* int sflags; */
|
---|
[1] | 2567 | int retval;
|
---|
[192] | 2568 | int error;
|
---|
[1] | 2569 |
|
---|
| 2570 | int byteread = 0;
|
---|
| 2571 | int bytes = 0;
|
---|
| 2572 | char * buf;
|
---|
| 2573 |
|
---|
| 2574 | time_t tnow;
|
---|
| 2575 | time_t tstart;
|
---|
| 2576 | time_t tdiff;
|
---|
| 2577 | extern volatile int sig_termfast;
|
---|
| 2578 |
|
---|
[131] | 2579 | if (is_nonblocking == SL_FALSE)
|
---|
[1] | 2580 | {
|
---|
[131] | 2581 | /* set to non-blocking mode
|
---|
| 2582 | */
|
---|
| 2583 | sflags = retry_fcntl(FIL__, __LINE__, fd, F_GETFL, 0);
|
---|
| 2584 | retry_fcntl(FIL__, __LINE__, fd, F_SETFL, sflags | O_NONBLOCK);
|
---|
[1] | 2585 | }
|
---|
| 2586 |
|
---|
| 2587 | buf = (char *) buf_in;
|
---|
| 2588 |
|
---|
| 2589 | tstart = time(NULL);
|
---|
| 2590 | tdiff = 0;
|
---|
| 2591 |
|
---|
| 2592 | while (count > 0)
|
---|
| 2593 | {
|
---|
| 2594 | FD_ZERO(&readfds);
|
---|
| 2595 | FD_SET(fd, &readfds);
|
---|
| 2596 |
|
---|
| 2597 | tv.tv_sec = timeout - tdiff;
|
---|
| 2598 | tv.tv_usec = 0;
|
---|
| 2599 |
|
---|
| 2600 | retval = select (fd+1, &readfds, NULL, NULL, &tv);
|
---|
| 2601 |
|
---|
| 2602 | if (retval > 0)
|
---|
| 2603 | {
|
---|
| 2604 | byteread = read (fd, buf, count);
|
---|
[8] | 2605 |
|
---|
| 2606 | if (byteread > 0)
|
---|
[1] | 2607 | {
|
---|
| 2608 | bytes += byteread; count -= byteread;
|
---|
| 2609 | buf += byteread;
|
---|
| 2610 | if (count == 0)
|
---|
| 2611 | break;
|
---|
| 2612 | }
|
---|
| 2613 | else if (byteread == 0)
|
---|
| 2614 | {
|
---|
[371] | 2615 | /* zero indicates end of file */
|
---|
[1] | 2616 | break;
|
---|
| 2617 | }
|
---|
| 2618 | else
|
---|
| 2619 | {
|
---|
| 2620 | if (errno == EINTR || errno == EAGAIN)
|
---|
| 2621 | {
|
---|
| 2622 | retry_msleep(1, 0);
|
---|
| 2623 | tnow = time(NULL);
|
---|
| 2624 | tdiff = tnow - tstart;
|
---|
| 2625 | continue;
|
---|
| 2626 | }
|
---|
| 2627 | else
|
---|
| 2628 | {
|
---|
[192] | 2629 | error = errno;
|
---|
[131] | 2630 | if (is_nonblocking == SL_FALSE)
|
---|
| 2631 | retry_fcntl(FIL__, __LINE__, fd, F_SETFL, sflags);
|
---|
[169] | 2632 | TPT(( 0, FIL__, __LINE__, _("msg=<read error>")));
|
---|
[192] | 2633 | errno = error;
|
---|
[1] | 2634 | return (SL_EREAD);
|
---|
| 2635 | }
|
---|
| 2636 | }
|
---|
| 2637 | }
|
---|
| 2638 | else if ((retval == -1) && (errno == EINTR || errno == EAGAIN))
|
---|
| 2639 | {
|
---|
| 2640 | retry_msleep(1, 0);
|
---|
| 2641 | tnow = time(NULL);
|
---|
| 2642 | tdiff = tnow - tstart;
|
---|
| 2643 | continue;
|
---|
| 2644 | }
|
---|
| 2645 | else if (retval == 0)
|
---|
| 2646 | {
|
---|
[131] | 2647 | if (is_nonblocking == SL_FALSE)
|
---|
| 2648 | retry_fcntl(FIL__, __LINE__, fd, F_SETFL, sflags);
|
---|
[169] | 2649 | TPT(( 0, FIL__, __LINE__, _("msg=<timeout>")));
|
---|
[192] | 2650 | errno = 0;
|
---|
[371] | 2651 | if (bytes > 0)
|
---|
| 2652 | return ((int) bytes);
|
---|
[1] | 2653 | return (SL_TIMEOUT);
|
---|
| 2654 | }
|
---|
| 2655 | else
|
---|
| 2656 | {
|
---|
[192] | 2657 | error = errno;
|
---|
[131] | 2658 | if (is_nonblocking == SL_FALSE)
|
---|
| 2659 | retry_fcntl(FIL__, __LINE__, fd, F_SETFL, sflags);
|
---|
[169] | 2660 | TPT(( 0, FIL__, __LINE__, _("msg=<timeout>")));
|
---|
[192] | 2661 | errno = error;
|
---|
[1] | 2662 | return (SL_EREAD);
|
---|
| 2663 | }
|
---|
[8] | 2664 |
|
---|
| 2665 | if (sig_termfast == 1)
|
---|
| 2666 | {
|
---|
[131] | 2667 | if (is_nonblocking == SL_FALSE)
|
---|
| 2668 | retry_fcntl(FIL__, __LINE__, fd, F_SETFL, sflags);
|
---|
[169] | 2669 | TPT(( 0, FIL__, __LINE__, _("msg=<terminated>")));
|
---|
[192] | 2670 | errno = 0;
|
---|
[8] | 2671 | return (SL_EREAD);
|
---|
| 2672 | }
|
---|
| 2673 |
|
---|
[1] | 2674 | tnow = time(NULL);
|
---|
| 2675 | tdiff = tnow - tstart;
|
---|
[8] | 2676 |
|
---|
| 2677 | if (tdiff > timeout)
|
---|
| 2678 | {
|
---|
[131] | 2679 | if (is_nonblocking == SL_FALSE)
|
---|
| 2680 | retry_fcntl(FIL__, __LINE__, fd, F_SETFL, sflags);
|
---|
[169] | 2681 | TPT(( 0, FIL__, __LINE__, _("msg=<timeout>")));
|
---|
[192] | 2682 | errno = 0;
|
---|
[371] | 2683 | if (bytes > 0)
|
---|
| 2684 | return ((int) bytes);
|
---|
[8] | 2685 | return (SL_TIMEOUT);
|
---|
| 2686 | }
|
---|
[1] | 2687 | }
|
---|
| 2688 |
|
---|
[131] | 2689 | if (is_nonblocking == SL_FALSE)
|
---|
| 2690 | retry_fcntl(FIL__, __LINE__, fd, F_SETFL, sflags);
|
---|
[1] | 2691 | return ((int) bytes);
|
---|
| 2692 | }
|
---|
| 2693 |
|
---|
[131] | 2694 | int sl_read_timeout (SL_TICKET ticket, void * buf_in, size_t count,
|
---|
| 2695 | int timeout, int is_nonblocking)
|
---|
| 2696 | {
|
---|
[169] | 2697 | int fd, retval;
|
---|
[131] | 2698 |
|
---|
[169] | 2699 | SL_ENTER(_("sl_read_timeout"));
|
---|
| 2700 |
|
---|
[131] | 2701 | if (buf_in == NULL || SL_ISERROR(fd = get_the_fd(ticket)))
|
---|
| 2702 | {
|
---|
| 2703 | if (buf_in == NULL)
|
---|
| 2704 | {
|
---|
| 2705 | TPT(( 0, FIL__, __LINE__, _("msg=<null buffer>")));
|
---|
[169] | 2706 | SL_IRETURN((SL_ENULL), _("sl_read_timeout"));
|
---|
[131] | 2707 | }
|
---|
| 2708 | if (SL_ISERROR(fd = get_the_fd(ticket)))
|
---|
| 2709 | {
|
---|
| 2710 | TPT(( 0, FIL__, __LINE__, _("msg=<ticket error> errno=<%d>"), fd));
|
---|
[169] | 2711 | SL_IRETURN((fd), _("sl_read_timeout"));
|
---|
[131] | 2712 | }
|
---|
| 2713 | }
|
---|
[1] | 2714 |
|
---|
[169] | 2715 | retval = sl_read_timeout_fd (fd, buf_in, count, timeout, is_nonblocking);
|
---|
| 2716 | SL_IRETURN((retval), _("sl_read_timeout"));
|
---|
[131] | 2717 | }
|
---|
| 2718 |
|
---|
| 2719 |
|
---|
[1] | 2720 | int sl_read (SL_TICKET ticket, void * buf_in, size_t count)
|
---|
| 2721 | {
|
---|
| 2722 | int fd;
|
---|
| 2723 | int byteread = 0;
|
---|
| 2724 | int bytes = 0;
|
---|
| 2725 |
|
---|
| 2726 | char * buf;
|
---|
| 2727 |
|
---|
[169] | 2728 | SL_ENTER(_("sl_read"));
|
---|
| 2729 |
|
---|
[1] | 2730 | if (count < 1)
|
---|
| 2731 | {
|
---|
| 2732 | TPT(( 0, FIL__, __LINE__, _("msg=<range error>")));
|
---|
[169] | 2733 | SL_IRETURN((SL_ERANGE), _("sl_read"));
|
---|
[1] | 2734 | }
|
---|
| 2735 | if (buf_in == NULL)
|
---|
| 2736 | {
|
---|
| 2737 | TPT(( 0, FIL__, __LINE__, _("msg=<null buffer>")));
|
---|
[169] | 2738 | SL_IRETURN((SL_ENULL), _("sl_read"));
|
---|
[1] | 2739 | }
|
---|
| 2740 |
|
---|
| 2741 | if (SL_ISERROR(fd = get_the_fd(ticket)))
|
---|
| 2742 | {
|
---|
| 2743 | TPT(( 0, FIL__, __LINE__, _("msg=<ticket error> errno=<%d>"), fd));
|
---|
[169] | 2744 | SL_IRETURN((fd), _("sl_read"));
|
---|
[1] | 2745 | }
|
---|
| 2746 |
|
---|
| 2747 | buf = (char *) buf_in;
|
---|
| 2748 |
|
---|
| 2749 | do
|
---|
| 2750 | {
|
---|
| 2751 | byteread = read (fd, buf, count);
|
---|
| 2752 | if (byteread > 0)
|
---|
| 2753 | {
|
---|
| 2754 | bytes += byteread; count -= byteread;
|
---|
| 2755 | buf += byteread;
|
---|
| 2756 | }
|
---|
| 2757 | } while ( byteread > 0 ||
|
---|
[5] | 2758 | ( byteread == -1 && (errno == EINTR || errno == EAGAIN))
|
---|
[1] | 2759 | );
|
---|
| 2760 |
|
---|
| 2761 |
|
---|
| 2762 | if (byteread == (-1))
|
---|
| 2763 | {
|
---|
| 2764 | TPT(( 0, FIL__, __LINE__, _("msg=<read error> errno=<%d>\n"), errno));
|
---|
[169] | 2765 | SL_IRETURN((SL_EREAD), _("sl_read"));
|
---|
[1] | 2766 | }
|
---|
[169] | 2767 | SL_IRETURN((bytes), _("sl_read"));
|
---|
[1] | 2768 | }
|
---|
| 2769 |
|
---|
| 2770 | int sl_read_fast (SL_TICKET ticket, void * buf_in, size_t count)
|
---|
| 2771 | {
|
---|
| 2772 | int fd;
|
---|
| 2773 | int byteread = 0;
|
---|
| 2774 |
|
---|
| 2775 | char * buf;
|
---|
| 2776 |
|
---|
[169] | 2777 | SL_ENTER(_("sl_read_fast"));
|
---|
| 2778 |
|
---|
[1] | 2779 | if (count < 1)
|
---|
| 2780 | {
|
---|
| 2781 | TPT(( 0, FIL__, __LINE__, _("msg=<range error>")));
|
---|
[169] | 2782 | SL_IRETURN((SL_ERANGE), _("sl_read_fast"));
|
---|
[1] | 2783 | }
|
---|
| 2784 | if (buf_in == NULL)
|
---|
| 2785 | {
|
---|
| 2786 | TPT(( 0, FIL__, __LINE__, _("msg=<null buffer>")));
|
---|
[169] | 2787 | SL_IRETURN((SL_ENULL), _("sl_read_fast"));
|
---|
[1] | 2788 | }
|
---|
| 2789 |
|
---|
| 2790 | if (SL_ISERROR(fd = get_the_fd(ticket)))
|
---|
| 2791 | {
|
---|
| 2792 | TPT(( 0, FIL__, __LINE__, _("msg=<ticket error> errno=<%d>"), fd));
|
---|
[169] | 2793 | SL_IRETURN((fd), _("sl_read_fast"));
|
---|
[1] | 2794 | }
|
---|
| 2795 |
|
---|
| 2796 | buf = (char *) buf_in;
|
---|
| 2797 |
|
---|
| 2798 | do
|
---|
| 2799 | {
|
---|
| 2800 | byteread = read (fd, buf, count);
|
---|
| 2801 | if (byteread >= 0)
|
---|
| 2802 | {
|
---|
[169] | 2803 | SL_IRETURN((byteread), _("sl_read_fast"));
|
---|
[1] | 2804 | }
|
---|
[5] | 2805 | } while ( byteread == -1 && (errno == EINTR || errno == EAGAIN));
|
---|
[1] | 2806 |
|
---|
| 2807 |
|
---|
| 2808 | if (byteread == (-1))
|
---|
| 2809 | {
|
---|
| 2810 | TPT(( 0, FIL__, __LINE__, _("msg=<read error> errno=<%d>\n"), errno));
|
---|
[169] | 2811 | SL_IRETURN((SL_EREAD), _("sl_read_fast"));
|
---|
[1] | 2812 | }
|
---|
[169] | 2813 | SL_IRETURN((0), _("sl_read_fast"));
|
---|
[1] | 2814 | }
|
---|
| 2815 |
|
---|
| 2816 |
|
---|
[170] | 2817 | int sl_write (SL_TICKET ticket, const void * msg_in, long nbytes)
|
---|
[1] | 2818 | {
|
---|
| 2819 | long bytewritten;
|
---|
| 2820 | long bytecount;
|
---|
| 2821 | int fd;
|
---|
| 2822 |
|
---|
[170] | 2823 | const char * msg;
|
---|
[1] | 2824 |
|
---|
| 2825 | SL_ENTER(_("sl_write"));
|
---|
| 2826 |
|
---|
| 2827 | if (nbytes < 1)
|
---|
| 2828 | SL_IRETURN(SL_ERANGE, _("sl_write"));
|
---|
| 2829 | if (msg_in == NULL)
|
---|
| 2830 | SL_IRETURN(SL_ENULL, _("sl_write"));
|
---|
| 2831 | if (SL_ISERROR(fd = get_the_fd(ticket)))
|
---|
| 2832 | SL_IRETURN(fd, _("sl_write"));
|
---|
| 2833 |
|
---|
[170] | 2834 | msg = (const char *) msg_in;
|
---|
[1] | 2835 |
|
---|
| 2836 | /* write
|
---|
| 2837 | */
|
---|
| 2838 | bytecount = 0;
|
---|
[383] | 2839 |
|
---|
[1] | 2840 | while (bytecount < nbytes)
|
---|
| 2841 | {
|
---|
[383] | 2842 | bytewritten = write (fd, msg, nbytes-bytecount);
|
---|
| 2843 |
|
---|
| 2844 | if (bytewritten > 0)
|
---|
[1] | 2845 | {
|
---|
| 2846 | bytecount += bytewritten;
|
---|
| 2847 | msg += bytewritten; /* move buffer pointer forward */
|
---|
| 2848 | }
|
---|
| 2849 | else if (bytewritten <= 0)
|
---|
| 2850 | {
|
---|
| 2851 | if ( errno == EINTR || errno == EAGAIN) /* try again */
|
---|
| 2852 | continue;
|
---|
| 2853 | else
|
---|
| 2854 | SL_IRETURN(SL_EWRITE, _("sl_write"));
|
---|
| 2855 | }
|
---|
| 2856 | }
|
---|
| 2857 | SL_IRETURN(SL_ENONE, _("sl_write"));
|
---|
| 2858 | }
|
---|
| 2859 |
|
---|
[170] | 2860 | int sl_write_line (SL_TICKET ticket, const void * msg, long nbytes)
|
---|
[1] | 2861 | {
|
---|
| 2862 | int status;
|
---|
| 2863 |
|
---|
| 2864 | SL_ENTER(_("sl_write_line"));
|
---|
| 2865 |
|
---|
| 2866 | status = sl_write(ticket, msg, nbytes);
|
---|
| 2867 | if (!SL_ISERROR(status))
|
---|
| 2868 | status = sl_write(ticket, "\n", 1);
|
---|
| 2869 |
|
---|
| 2870 | SL_IRETURN(status, _("sl_write_line"));
|
---|
| 2871 | }
|
---|
| 2872 |
|
---|
[76] | 2873 | int sl_write_line_fast (SL_TICKET ticket, void * msg, long nbytes)
|
---|
| 2874 | {
|
---|
| 2875 | int status;
|
---|
| 2876 | char * p = (char *) msg;
|
---|
[1] | 2877 |
|
---|
[76] | 2878 | SL_ENTER(_("sl_write_line_fast"));
|
---|
| 2879 |
|
---|
| 2880 | /* Here nbytes is strlen(msg), so p[nbytes] is the terminating '\0'
|
---|
| 2881 | * Overwrite the terminator, write out, then write back the terminator.
|
---|
| 2882 | */
|
---|
| 2883 | p[nbytes] = '\n';
|
---|
| 2884 | status = sl_write(ticket, msg, nbytes+1);
|
---|
| 2885 | p[nbytes] = '\0';
|
---|
| 2886 |
|
---|
| 2887 | SL_IRETURN(status, _("sl_write_line_fast"));
|
---|
| 2888 | }
|
---|
| 2889 |
|
---|
| 2890 |
|
---|
[1] | 2891 | /* ----------------------------------------------------------------
|
---|
| 2892 | *
|
---|
| 2893 | * Trustfile interface
|
---|
| 2894 | *
|
---|
| 2895 | * ---------------------------------------------------------------- */
|
---|
| 2896 |
|
---|
| 2897 | extern uid_t rootonly[];
|
---|
| 2898 | extern int EUIDSLOT;
|
---|
| 2899 | extern int ORIG_EUIDSLOT;
|
---|
| 2900 |
|
---|
| 2901 | extern char tf_path[MAXFILENAME]; /* Error path for trust function. */
|
---|
| 2902 | extern uid_t tf_euid; /* Space for EUID of process. */
|
---|
| 2903 |
|
---|
| 2904 | char * sl_error_string(int errorcode)
|
---|
| 2905 | {
|
---|
[192] | 2906 |
|
---|
[1] | 2907 | switch (errorcode)
|
---|
| 2908 | {
|
---|
| 2909 | case SL_EBOGUS:
|
---|
[214] | 2910 | return _("Bogus file, modified during access");
|
---|
[1] | 2911 | case SL_EWRITE:
|
---|
[200] | 2912 | return _("Write error");
|
---|
[1] | 2913 | case SL_EREAD:
|
---|
[200] | 2914 | return _("Read error");
|
---|
[1] | 2915 | case SL_ESYNC:
|
---|
[200] | 2916 | return _("Error in fsync()");
|
---|
[1] | 2917 | case SL_EFORWARD:
|
---|
[200] | 2918 | return _("Error in lseek()");
|
---|
[1] | 2919 | case SL_EREWIND:
|
---|
[200] | 2920 | return _("Error in lseek()");
|
---|
[1] | 2921 | case SL_EUNLINK:
|
---|
[200] | 2922 | return _("Error in unlink()");
|
---|
[1] | 2923 | case SL_EMEM:
|
---|
[200] | 2924 | return _("Out of memory");
|
---|
[1] | 2925 | case SL_EINTERNAL:
|
---|
[200] | 2926 | return _("Internal error");
|
---|
[243] | 2927 | case SL_EINTERNAL01:
|
---|
| 2928 | return _("Internal error 01");
|
---|
| 2929 | case SL_EINTERNAL02:
|
---|
| 2930 | return _("Internal error 02");
|
---|
| 2931 | case SL_EINTERNAL03:
|
---|
| 2932 | return _("Internal error 03");
|
---|
| 2933 | case SL_EINTERNAL04:
|
---|
| 2934 | return _("Internal error 04");
|
---|
| 2935 | case SL_EINTERNAL05:
|
---|
| 2936 | return _("Internal error 05");
|
---|
| 2937 | case SL_EINTERNAL06:
|
---|
| 2938 | return _("Internal error 06");
|
---|
| 2939 | case SL_EINTERNAL07:
|
---|
| 2940 | return _("Internal error 07");
|
---|
| 2941 | case SL_EINTERNAL08:
|
---|
| 2942 | return _("Internal error 08");
|
---|
| 2943 | case SL_EINTERNAL09:
|
---|
| 2944 | return _("Internal error 09");
|
---|
| 2945 | case SL_EINTERNAL10:
|
---|
| 2946 | return _("Internal error 10");
|
---|
| 2947 | case SL_EINTERNAL11:
|
---|
| 2948 | return _("Internal error 11");
|
---|
| 2949 | case SL_EINTERNAL12:
|
---|
| 2950 | return _("Internal error 12");
|
---|
[1] | 2951 | case SL_ETICKET:
|
---|
[200] | 2952 | return _("Bad ticket");
|
---|
[1] | 2953 | case SL_EREPEAT:
|
---|
[200] | 2954 | return _("Illegal repeated use of function");
|
---|
[1] | 2955 | case SL_ERANGE:
|
---|
[200] | 2956 | return _("Argument out of range");
|
---|
[1] | 2957 | case SL_ENULL:
|
---|
[200] | 2958 | return _("Dereferenced NULL pointer");
|
---|
[1] | 2959 |
|
---|
| 2960 | case SL_EBADUID:
|
---|
[200] | 2961 | return _("Owner not trustworthy");
|
---|
[1] | 2962 | case SL_EBADGID:
|
---|
[200] | 2963 | return _("Group writeable and member not trustworthy");
|
---|
[1] | 2964 | case SL_EBADOTH:
|
---|
[200] | 2965 | return _("World writeable");
|
---|
[192] | 2966 | case SL_EISDIR:
|
---|
[200] | 2967 | return _("Is a directory");
|
---|
[1] | 2968 | case SL_EBADFILE:
|
---|
[200] | 2969 | return _("File access error");
|
---|
[1] | 2970 | case SL_EBADNAME:
|
---|
[200] | 2971 | return _("Invalid filename (prob. too long or null)");
|
---|
[1] | 2972 |
|
---|
| 2973 | case SL_ETRUNC:
|
---|
[200] | 2974 | return _("Truncation occured");
|
---|
[1] | 2975 | case SL_ESTAT:
|
---|
[200] | 2976 | return _("stat() failed");
|
---|
[192] | 2977 | case SL_EFSTAT:
|
---|
[200] | 2978 | return _("fstat() failed");
|
---|
[1] | 2979 | default:
|
---|
[200] | 2980 | return _("Unknown error");
|
---|
[1] | 2981 | }
|
---|
| 2982 | }
|
---|
| 2983 |
|
---|
| 2984 |
|
---|
| 2985 |
|
---|
[170] | 2986 | char * sl_trust_errfile(void)
|
---|
[1] | 2987 | {
|
---|
| 2988 | return &tf_path[0];
|
---|
| 2989 | }
|
---|
| 2990 |
|
---|
| 2991 | extern uid_t tf_baduid;
|
---|
[170] | 2992 | uid_t sl_trust_baduid(void)
|
---|
[1] | 2993 | {
|
---|
| 2994 | return tf_baduid;
|
---|
| 2995 | }
|
---|
| 2996 |
|
---|
| 2997 | extern gid_t tf_badgid;
|
---|
[170] | 2998 | gid_t sl_trust_badgid(void)
|
---|
[1] | 2999 | {
|
---|
| 3000 | return tf_badgid;
|
---|
| 3001 | }
|
---|
| 3002 |
|
---|
| 3003 |
|
---|
| 3004 | static int trust_count = 0;
|
---|
| 3005 |
|
---|
[170] | 3006 | int sl_trust_purge_user (void)
|
---|
[1] | 3007 | {
|
---|
| 3008 | int i;
|
---|
| 3009 |
|
---|
| 3010 | EUIDSLOT = ORIG_EUIDSLOT;
|
---|
| 3011 | trust_count = 0;
|
---|
| 3012 |
|
---|
| 3013 | for (i = EUIDSLOT; i < (EUIDSLOT + 15); ++i)
|
---|
| 3014 | rootonly[i] = sh_uid_neg;
|
---|
| 3015 | return 0;
|
---|
| 3016 | }
|
---|
| 3017 |
|
---|
| 3018 | int sl_trust_add_user (uid_t pwid)
|
---|
| 3019 | {
|
---|
| 3020 | SL_ENTER(_("sl_trust_add_user"));
|
---|
| 3021 |
|
---|
| 3022 | if (trust_count == 15)
|
---|
| 3023 | SL_IRETURN(SL_ERANGE, _("sl_trust_add_user"));
|
---|
| 3024 |
|
---|
| 3025 | rootonly[EUIDSLOT] = pwid;
|
---|
| 3026 | ++EUIDSLOT;
|
---|
| 3027 | ++trust_count;
|
---|
| 3028 |
|
---|
| 3029 | SL_IRETURN(SL_ENONE, _("sl_trust_add_user"));
|
---|
| 3030 | }
|
---|
| 3031 |
|
---|
[76] | 3032 | #include "sh_mem.h"
|
---|
| 3033 | extern char * sh_util_strdup (const char * str);
|
---|
| 3034 |
|
---|
| 3035 | struct sl_trustfile_store {
|
---|
| 3036 | char * filename;
|
---|
| 3037 | uid_t teuid;
|
---|
| 3038 | struct sl_trustfile_store * next;
|
---|
| 3039 | };
|
---|
| 3040 |
|
---|
| 3041 | static struct sl_trustfile_store * sl_trusted_files = NULL;
|
---|
| 3042 |
|
---|
[183] | 3043 | static void sl_add_trusted_file(const char * filename, uid_t teuid)
|
---|
[76] | 3044 | {
|
---|
| 3045 | struct sl_trustfile_store *new = SH_ALLOC(sizeof(struct sl_trustfile_store));
|
---|
| 3046 |
|
---|
| 3047 | new->filename = sh_util_strdup (filename);
|
---|
| 3048 | new->teuid = teuid;
|
---|
| 3049 | new->next = sl_trusted_files;
|
---|
| 3050 |
|
---|
| 3051 | sl_trusted_files = new;
|
---|
| 3052 | return;
|
---|
| 3053 | }
|
---|
| 3054 |
|
---|
[183] | 3055 | static const char * sl_check_trusted_file(const char * filename, uid_t teuid)
|
---|
[76] | 3056 | {
|
---|
| 3057 | struct sl_trustfile_store *new = sl_trusted_files;
|
---|
| 3058 |
|
---|
| 3059 | while (new)
|
---|
| 3060 | {
|
---|
| 3061 | if ((new->teuid == teuid) && (0 == strcmp(new->filename, filename)))
|
---|
| 3062 | return filename;
|
---|
| 3063 | new = new->next;
|
---|
| 3064 | }
|
---|
| 3065 |
|
---|
| 3066 | return NULL;
|
---|
| 3067 | }
|
---|
| 3068 |
|
---|
[183] | 3069 | static void sl_clear_trusted_file(struct sl_trustfile_store * file)
|
---|
[76] | 3070 | {
|
---|
| 3071 | if (file)
|
---|
| 3072 | {
|
---|
| 3073 | if (file->next != NULL)
|
---|
| 3074 | sl_clear_trusted_file(file->next);
|
---|
| 3075 | SH_FREE(file->filename);
|
---|
| 3076 | SH_FREE(file);
|
---|
| 3077 | }
|
---|
| 3078 | return;
|
---|
| 3079 | }
|
---|
| 3080 |
|
---|
[183] | 3081 | int sl_trustfile_euid(const char * filename, uid_t teuid)
|
---|
[1] | 3082 | {
|
---|
[76] | 3083 | long status;
|
---|
| 3084 | static time_t old = 0;
|
---|
| 3085 | static time_t now;
|
---|
| 3086 |
|
---|
[1] | 3087 | SL_ENTER(_("sl_trustfile_euid"));
|
---|
| 3088 |
|
---|
| 3089 | tf_path[0] = '\0';
|
---|
| 3090 | if (filename == NULL || filename[0] == '\0')
|
---|
| 3091 | SL_IRETURN(SL_EBADNAME, _("sl_trustfile_euid"));
|
---|
| 3092 |
|
---|
[76] | 3093 | now = time(NULL);
|
---|
| 3094 | if (now < (old + 300))
|
---|
| 3095 | {
|
---|
| 3096 | if (NULL != sl_check_trusted_file(filename, teuid))
|
---|
| 3097 | {
|
---|
| 3098 | sl_strlcpy(tf_path, filename, sizeof(tf_path));
|
---|
| 3099 | SL_IRETURN(SL_ENONE, _("sl_trustfile_euid"));
|
---|
| 3100 | }
|
---|
| 3101 | }
|
---|
| 3102 | else
|
---|
| 3103 | {
|
---|
| 3104 | sl_clear_trusted_file(sl_trusted_files);
|
---|
| 3105 | sl_trusted_files = NULL;
|
---|
| 3106 | old = now;
|
---|
| 3107 | }
|
---|
| 3108 |
|
---|
[1] | 3109 | tf_euid = teuid;
|
---|
| 3110 | status = sl_trustfile(filename, NULL, NULL);
|
---|
[76] | 3111 | if (status == SL_ENONE)
|
---|
| 3112 | sl_add_trusted_file(filename, teuid);
|
---|
[1] | 3113 | SL_IRETURN(status, _("sl_trustfile_euid"));
|
---|
| 3114 | }
|
---|
| 3115 |
|
---|
[20] | 3116 | /* ----------------------------------------------------------------
|
---|
| 3117 | *
|
---|
| 3118 | * Overflow tests
|
---|
| 3119 | *
|
---|
| 3120 | * ---------------------------------------------------------------- */
|
---|
[1] | 3121 |
|
---|
[34] | 3122 | #ifndef SIZE_MAX
|
---|
| 3123 | #define SIZE_MAX (4294967295U)
|
---|
| 3124 | #endif
|
---|
| 3125 |
|
---|
[20] | 3126 | int sl_ok_muli (int a, int b) /* a*b */
|
---|
| 3127 | {
|
---|
[34] | 3128 | if ((b == 0) || (a >= (INT_MIN / b) && a <= (INT_MAX / b)))
|
---|
[20] | 3129 | return SL_TRUE; /* no overflow */
|
---|
| 3130 | return SL_FALSE;
|
---|
| 3131 | }
|
---|
| 3132 |
|
---|
[34] | 3133 | int sl_ok_muls (size_t a, size_t b) /* a*b */
|
---|
| 3134 | {
|
---|
| 3135 | if ((b == 0) || (a <= (SIZE_MAX / b)))
|
---|
| 3136 | return SL_TRUE; /* no overflow */
|
---|
| 3137 | return SL_FALSE;
|
---|
| 3138 | }
|
---|
| 3139 |
|
---|
[20] | 3140 | int sl_ok_divi (int a, int b) /* a/b */
|
---|
| 3141 | {
|
---|
| 3142 | (void) a;
|
---|
| 3143 | if (b != 0)
|
---|
| 3144 | return SL_TRUE; /* no overflow */
|
---|
| 3145 | return SL_FALSE;
|
---|
| 3146 | }
|
---|
| 3147 |
|
---|
| 3148 | int sl_ok_addi (int a, int b) /* a+b */
|
---|
| 3149 | {
|
---|
| 3150 | if (a >= 0 && b >= 0)
|
---|
| 3151 | {
|
---|
| 3152 | if (a <= (INT_MAX - b))
|
---|
| 3153 | return SL_TRUE; /* no overflow */
|
---|
| 3154 | else
|
---|
| 3155 | return SL_FALSE;
|
---|
| 3156 | }
|
---|
| 3157 | else if (a < 0 && b < 0)
|
---|
| 3158 | {
|
---|
| 3159 | if (a >= (INT_MIN - b))
|
---|
| 3160 | return SL_TRUE; /* no overflow */
|
---|
| 3161 | else
|
---|
| 3162 | return SL_FALSE;
|
---|
| 3163 | }
|
---|
| 3164 | return SL_TRUE;
|
---|
| 3165 | }
|
---|
| 3166 |
|
---|
[34] | 3167 | int sl_ok_adds (size_t a, size_t b) /* a+b */
|
---|
| 3168 | {
|
---|
| 3169 | if (a <= (SIZE_MAX - b))
|
---|
| 3170 | return SL_TRUE; /* no overflow */
|
---|
| 3171 | else
|
---|
| 3172 | return SL_FALSE;
|
---|
| 3173 | }
|
---|
| 3174 |
|
---|
[20] | 3175 | int sl_ok_subi (int a, int b) /* a-b */
|
---|
| 3176 | {
|
---|
| 3177 | if (a >= 0 && b < 0)
|
---|
| 3178 | {
|
---|
| 3179 | if (a <= (INT_MAX + b))
|
---|
| 3180 | return SL_TRUE; /* no overflow */
|
---|
| 3181 | else
|
---|
| 3182 | return SL_FALSE;
|
---|
| 3183 | }
|
---|
| 3184 | else if (a < 0 && b >= 0)
|
---|
| 3185 | {
|
---|
| 3186 | if (a >= (INT_MIN + b))
|
---|
| 3187 | return SL_TRUE; /* no overflow */
|
---|
| 3188 | else
|
---|
| 3189 | return SL_FALSE;
|
---|
| 3190 | }
|
---|
| 3191 | return SL_TRUE;
|
---|
| 3192 | }
|
---|