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source: trunk/src/slib.c@ 100

Last change on this file since 100 was 76, checked in by rainer, 18 years ago
Fix for ticket #38 (csv escaping) and #39 (building on cygwin). Also optimize a bit.
File size: 57.5 KB

Rev	Line
[1]	1	#include "config_xor.h"
	2
	3
	4	#include <stdio.h>
	5	#include <stdlib.h>
	6	#include <stdarg.h>
	7	#include <string.h>
[20]	8	#include <limits.h>
[34]	9	#ifdef HAVE_STDINT_H
	10	/* for SIZE_MAX */
	11	#include <stdint.h>
	12	#endif
[1]	13
	14	#include <unistd.h>
	15	#include <sys/stat.h>
	16	#include <sys/types.h>
	17	#include <fcntl.h>
	18	#include <signal.h>
	19
	20	#if TIME_WITH_SYS_TIME
	21	#include <sys/time.h>
	22	#include <time.h>
	23	#else
	24	#if HAVE_SYS_TIME_H
	25	#include <sys/time.h>
	26	#else
	27	#include <time.h>
	28	#endif
	29	#endif
	30
	31	#ifdef HAVE_MEMORY_H
	32	#include <memory.h>
	33	#endif
	34	#ifdef HAVE_SYS_SELECT_H
	35	#include <sys/select.h>
	36	#endif
	37
	38	#ifndef FD_SET
	39	#define NFDBITS 32
	40	#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] \|= (1 << ((n) % NFDBITS)))
	41	#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
	42	#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
	43	#endif /* !FD_SET */
	44	#ifndef FD_SETSIZE
	45	#define FD_SETSIZE 32
	46	#endif
	47	#ifndef FD_ZERO
	48	#define FD_ZERO(p) memset((char )(p), '\0', sizeof((p)))
	49	#endif
	50
[76]	51	#define SH_REAL_SET
	52
[1]	53	#include "slib.h"
	54	#include "sh_calls.h"
	55	#define SH_NEED_PWD_GRP 1
	56	#include "sh_static.h"
	57
	58	#undef FIL__
	59	#define FIL__ _("slib.c")
	60
	61	const uid_t sh_uid_neg = ((uid_t) -1);
	62	const gid_t sh_gid_neg = ((gid_t) -1);
	63
	64	#undef BREAKEXIT
	65	#if defined(SCREW_IT_UP) && defined(__linux__) && defined(__i386__)
	66
	67	#ifdef SH_DEBUG
	68	#define BREAKEXIT(expr) \
	69	do { \
	70	int ixi; \
	71	for (ixi = 0; ixi < 8; ++ixi) { \
	72	if (((volatile unsigned )((unsigned) expr + ixi) & 0xff) == 0xcc) \
	73	{ dlog(0, FIL__, __LINE__, _("BREAKEXIT")); _exit(EXIT_FAILURE); } \
	74	} \
	75	} \
	76	while (1 == 0)
	77	#else
	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	_exit(EXIT_FAILURE); \
	84	} \
	85	} \
	86	while (1 == 0)
	87	#endif
	88
	89	#else
	90	#define BREAKEXIT(expr)
	91	#endif
	92
	93	/****************************************************************
	94	*
	95	* The debug/trace subsystem
	96	*
	97	****************************************************************/
	98
	99	int slib_do_trace = 0;
	100	int slib_trace_fd = -1;
	101
	102	static char trace_log[256] = { '\0' };
	103	static int trace_level = 0;
	104	static FILE * trace_fp = NULL;
	105
[20]	106	int sl_trace_use (const char * dummy)
[1]	107	{
	108	if (dummy)
	109	slib_do_trace = 1;
	110	else
	111	slib_do_trace = 1;
	112	return 0;
	113	}
	114
[20]	115	int sl_trace_file (const char * str)
[1]	116	{
	117	if (!str)
	118	return -1;
	119	if (str[0] != '/')
	120	return -1;
	121	sl_strlcpy(trace_log, str, 256);
	122	return 0;
	123	}
	124
	125	FILE * sl_tracefile_open(char * file, char * mode)
	126	{
	127	FILE * xp = NULL;
	128	slib_trace_fd = open(file, O_WRONLY\|O_CREAT\|O_APPEND, 0600);
	129	if (slib_trace_fd >= 0)
	130	xp = fdopen(slib_trace_fd, mode);
	131	return xp;
	132	}
	133
	134	void sl_trace_in(char * str, char * file, int line)
	135	{
	136	int i;
	137	if (trace_log[0] == '\0')
	138	{
	139	fprintf(stderr, "++ ");
	140	for (i = 0; i < trace_level; ++i)
	141	fprintf(stderr, ". ");
	142	fprintf(stderr, "[%2d] %s \t - File %c%s%c at line %d\n",
	143	trace_level, str, 0x22, file, 0x22, line);
	144	}
	145	else if (!sl_is_suid())
	146	{
	147	if (!trace_fp)
	148	trace_fp = sl_tracefile_open(trace_log, "a");
	149	if (trace_fp)
	150	{
	151	fprintf(trace_fp, "++ ");
	152	for (i = 0; i < trace_level; ++i)
	153	fprintf(trace_fp, ". ");
	154	fprintf(trace_fp, "[%2d] %s \t - File %c%s%c at line %d\n",
	155	trace_level, str, 0x22, file, 0x22, line);
	156	}
	157	else
	158	{
	159	perror(_("sl_trace_in: fopen"));
	160	_exit(1);
	161	}
	162	}
	163	++trace_level;
	164	}
	165
	166	void sl_trace_out(char * str, char * file, int line)
	167	{
	168	int i;
	169
	170	--trace_level; if (trace_level < 0) trace_level = 0;
	171
	172	if (trace_log[0] == '\0')
	173	{
	174	fprintf(stderr, "-- ");
	175	for (i = 0; i < trace_level; ++i)
	176	fprintf(stderr, ". ");
	177	fprintf(stderr, _("[%2d] %s \t - File %c%s%c at line %d\n"),
	178	trace_level, str, 0x22, file, 0x22, line);
	179	}
	180	else if (!sl_is_suid())
	181	{
	182	if (!trace_fp)
	183	trace_fp = sl_tracefile_open(trace_log, "a");
	184	if (trace_fp)
	185	{
	186	fprintf(trace_fp, "-- ");
	187	for (i = 0; i < trace_level; ++i)
	188	fprintf(trace_fp, ". ");
	189	fprintf(trace_fp, _("[%2d] %s \t - File %c%s%c at line %d\n"),
	190	trace_level, str, 0x22, file, 0x22, line);
	191	}
	192	else
	193	{
	194	perror(_("sl_trace_out: fopen"));
	195	_exit(1);
	196	}
	197	}
	198	}
	199
	200	extern int sh_log_console (char * msg);
	201
	202	static int dlogActive = 0;
	203
	204	/* this is called from sh_error_setprint()
	205	*/
	206	void dlog_set_active(int flag)
	207	{
	208	dlogActive = flag;
	209	}
	210
	211	/* flag = 0 debug messages
	212	* = 1 descriptive error messages
	213	* = 3 backtrace
	214	*/
	215	int dlog (int flag, char * file, int line, const char *fmt, ...)
	216	{
	217	va_list ap;
	218	char val[81];
	219	char msg[512];
	220	char tmp[512];
	221	int retval = 0;
	222	int i;
	223
	224	#ifdef SH_STEALTH
	225	/*
	226	* do not even print descriptive failure messages in stealth mode
	227	*/
	228	if (dlogActive == 0)
	229	return 0;
	230	if (dlogActive == 1 && flag == 0) /* debug requires debug level */
	231	return 0;
	232	#else
	233	if (dlogActive <= 1 && flag == 0) /* debug requires debug level */
	234	return 0;
	235	#endif
	236
	237	if (flag == 1)
	238	{
[22]	239	sl_snprintf (val, 81, _("\n--------- %10s "), file);
[1]	240	sl_strlcpy (msg, val, 80);
[22]	241	sl_snprintf (val, 81, _(" --- %6d ---------\n"), line);
[1]	242	sl_strlcat (msg, val, 80);
	243	sh_log_console (msg);
	244	}
	245
	246	va_start (ap, fmt);
	247	if (flag == 1)
	248	sl_strlcpy(tmp, fmt, 512);
	249	else
	250	sl_strlcpy(tmp, fmt, 256);
	251	retval = sl_strlen(tmp);
	252	if (retval > 0 && tmp[retval-1] == '\n')
	253	tmp[retval-1] = '\0';
	254	retval = 0;
	255	if (flag == 1)
	256	{
	257	sl_vsnprintf (msg, 511, tmp, ap);
	258	}
	259	else
	260	{
	261	sl_strlcpy (msg, "## ", 256);
	262	for (i = 0; i < trace_level; ++i)
	263	sl_strlcat (msg, ". ", 256);
	264	sprintf (val, _("[%2d] "), trace_level);
	265	sl_strlcat (msg, val, 256);
	266	sl_vsnprintf (&msg[sl_strlen(msg)], 255, tmp, ap);
	267	sl_snprintf (tmp, 255, _(" \t - File %c%s%c at line %d"),
	268	0x22, file, 0x22, line);
	269	sl_strlcat (msg, tmp, 512);
	270	}
	271	va_end (ap);
	272	if (flag != 0 \|\| sl_is_suid())
	273	retval = sh_log_console (msg);
	274	else
	275	{
	276	if (trace_log[0] == '\0')
	277	{
	278	/* sh_log_console (msg); */
	279	fprintf(stderr, "%s\n", msg);
	280	}
	281	else
	282	{
	283	if (!trace_fp)
	284	trace_fp = sl_tracefile_open(trace_log, "a");
	285	if (trace_fp)
	286	{
	287	fprintf(trace_fp, "%s\n", msg);
	288	}
	289	else
	290	{
	291	perror(_("dlog: fopen"));
	292	_exit(1);
	293	}
	294	}
	295	}
	296	if (flag == 1)
	297	sh_log_console (_("\n----------------------------------------------\n"));
	298	return retval;
	299	}
	300
	301	extern char aud_err_message[64];
	302	static char alt_err_message[64];
	303	char * sl_get_errmsg()
	304	{
	305	if (aud_err_message[0] == '\0')
	306	{
	307	sl_strlcpy(alt_err_message, sl_error_string(sl_errno), 64);
	308	return &alt_err_message[0];
	309	}
	310	return &aud_err_message[0];
	311	}
	312
	313
	314	#if defined(SL_DEBUG)
	315	#define SL_MAX_MYSTACK 128
	316
	317	static char sl_mystack[SL_MAX_MYSTACK][32];
	318	static int sl_mystack_count = 0;
	319
	320	void sl_stack_push(char * c, char * file, int line )
	321	{
	322	if (slib_do_trace)
	323	sl_trace_in(c, file, line);
	324	if (c && sl_mystack_count < SL_MAX_MYSTACK)
	325	{
	326	strncpy(sl_mystack[sl_mystack_count], c, 31);
	327	sl_mystack[sl_mystack_count][31] = '\0';
	328	++sl_mystack_count;
	329	/*
	330	fprintf(stderr, "#%03d %s\n", sl_mystack_count,
	331	sl_mystack[sl_mystack_count-1]);
	332	*/
	333	}
	334	return;
	335	}
	336
	337	void sl_stack_pop(char * c, char * file, int line)
	338	{
	339	if (slib_do_trace)
	340	sl_trace_out(c, file, line);
	341	if (sl_mystack_count > 0)
	342	{
	343	/*
	344	fprintf(stderr, " <- #%03d %s\n", sl_mystack_count,
	345	sl_mystack[sl_mystack_count-1]);
	346	*/
	347	--sl_mystack_count;
	348	}
	349	return;
	350	}
	351
	352	void sl_stack_print()
	353	{
	354	int i;
	355	/* FILE * dfile; */
	356
	357	if (sl_mystack_count > 0)
	358	{
	359	sh_log_console(_("\nBacktrace:\n"));
	360	/* dlog(3, FIL__, __LINE__, _("\nBacktrace:\n")); */
	361	for (i = 0; i < sl_mystack_count; ++i)
	362	sh_log_console(sl_mystack[i]);
	363	/* dlog(3, FIL__, __LINE__, _("#%03d %s\n"), i, sl_mystack[i]); */
	364	}
	365	return;
	366	}
	367
	368	#endif
	369
	370
	371	/*
	372	* The global errno.
	373	* On error, this is set to the return value of the function.
	374	*/
	375	long int sl_errno;
	376
	377
	378	/* ----------------------------------------------------------------
	379	*
	380	* Capability routines
	381	*
	382	* ---------------------------------------------------------------- */
	383
	384	int sl_useCaps = 0;
	385
	386	#ifdef FANCY_LIBCAP
	387	#include <sys/capability.h>
	388
	389	/*
	390	* While these routines are tested and work, we don't use POSIX
	391	* capabilities, as they don't seem to be useful (root can write
	392	* to root-owned files anyway). Things would be more interesting
	393	* if we could switch to a non-root UID with just a few capabilities
	394	* enabled.
	395	*/
	396	int sl_drop_cap ()
	397	{
	398	int error;
	399	cap_t caps;
	400	cap_flag_t capflag;
	401	cap_flag_value_t capfval = CAP_CLEAR;
	402	cap_value_t capvals_e[] =
	403	{
	404	CAP_CHOWN, CAP_FOWNER, CAP_FSETID,
	405	CAP_LINUX_IMMUTABLE, CAP_MKNOD, CAP_NET_ADMIN,
	406	CAP_NET_BIND_SERVICE, CAP_NET_BROADCAST, CAP_NET_RAW,
	407	CAP_SYS_ADMIN, CAP_SYS_BOOT, CAP_SYS_CHROOT,
	408	CAP_SYS_PACCT, CAP_SYS_PTRACE, CAP_SYS_RAWIO,
	409	CAP_SYS_RESOURCE, CAP_SYS_TIME, CAP_SYS_TTY_CONFIG,
	410	CAP_SETGID, CAP_SETUID, CAP_KILL,
	411	CAP_DAC_OVERRIDE,
	412	#if !defined(WITH_MESSAGE_QUEUE)
	413	CAP_IPC_OWNER,
	414	#endif
	415	CAP_SYS_MODULE, CAP_LEASE
	416	};
	417	cap_value_t capvals_p[] =
	418	{
	419	CAP_CHOWN, CAP_LEASE, CAP_FSETID,
	420	CAP_LINUX_IMMUTABLE, CAP_MKNOD, CAP_NET_ADMIN,
	421	CAP_NET_BIND_SERVICE, CAP_NET_BROADCAST, CAP_NET_RAW,
	422	CAP_SYS_ADMIN, CAP_SYS_BOOT, CAP_SYS_CHROOT,
	423	CAP_SYS_PACCT, CAP_SYS_PTRACE, CAP_SYS_RAWIO,
	424	CAP_SYS_RESOURCE, CAP_SYS_TIME, CAP_SYS_TTY_CONFIG,
	425	#if !defined(WITH_EXTERNAL) && !defined(HAVE_UNIX_RANDOM)
	426	CAP_SETGID, CAP_SETUID, CAP_KILL,
	427	#endif
	428	#if !defined(SH_USE_SUIDCHK)
	429	CAP_DAC_OVERRIDE, CAP_FOWNER,
	430	#endif
	431	#if !defined(WITH_MESSAGE_QUEUE)
	432	CAP_IPC_OWNER,
	433	#endif
	434	CAP_SYS_MODULE
	435	};
	436
	437	if (0 == sl_useCaps) /* 0 = S_FALSE */
	438	{
	439	return 0;
	440	}
	441
	442	if(NULL == (caps = cap_get_proc()))
	443	{
	444	return errno;
	445	}
	446
	447	capflag = CAP_EFFECTIVE;
	448	if (0 != cap_set_flag(caps, capflag, sizeof(capvals_e)/sizeof(cap_value_t),
	449	capvals_e, capfval))
	450	{
	451	error = errno;
	452	cap_free(caps);
	453	return error;
	454	}
	455	if (0 != cap_set_proc(caps))
	456	{
	457	error = errno;
	458	cap_free(caps);
	459	return error;
	460	}
	461
	462	capflag = CAP_PERMITTED;
	463	if (0 != cap_set_flag(caps, capflag, sizeof(capvals_p)/sizeof(cap_value_t),
	464	capvals_p, capfval))
	465	{
	466	error = errno;
	467	cap_free(caps);
	468	return error;
	469	}
	470	if (0 != cap_set_proc(caps))
	471	{
	472	error = errno;
	473	cap_free(caps);
	474	return error;
	475	}
	476	cap_free(caps);
	477	return 0;
	478	}
	479
	480	int sl_drop_cap_int(int what)
	481	{
	482	#if defined(SL_DEBUG)
	483	char * captext;
	484	#endif
	485	cap_flag_t capflag = CAP_EFFECTIVE;
	486	cap_flag_value_t capfval = CAP_CLEAR;
	487	cap_value_t capvals_a[] = { CAP_SETGID, CAP_SETUID, CAP_KILL };
	488	cap_value_t capvals_b[] = { CAP_DAC_OVERRIDE, CAP_FOWNER };
	489	cap_value_t * capvals;
	490	int nvals;
	491	int error = 0;
	492	cap_t caps = cap_get_proc();
	493
	494	if (0 == sl_useCaps) /* 0 = S_FALSE */
	495	{
	496	return 0;
	497	}
	498
	499	if (caps == NULL)
	500	{
	501	return errno;
	502	}
	503
	504	switch (what) {
	505	case 1:
	506	capvals = capvals_a;
	507	nvals = 3;
	508	capfval = CAP_CLEAR;
	509	break;
	510	case 2:
	511	capvals = capvals_a;
	512	nvals = 3;
	513	capfval = CAP_SET;
	514	break;
	515	case 3:
	516	capvals = capvals_b;
	517	nvals = 2;
	518	capfval = CAP_CLEAR;
	519	break;
	520	case 4:
	521	capvals = capvals_b;
	522	nvals = 2;
	523	capfval = CAP_SET;
	524	break;
	525	default:
	526	return (0);
	527	}
	528
	529	if (0 != cap_set_flag(caps, capflag, nvals, capvals, capfval))
	530	{
	531	error = errno;
	532	cap_free(caps);
	533	return error;
	534	}
	535	if (0 != cap_set_proc(caps))
	536	{
	537	error = errno;
	538	cap_free(caps);
	539	return error;
	540	}
	541	#if defined(SL_DEBUG)
	542	captext = cap_to_text(caps, NULL);
	543	TPT(( 0, FIL__, __LINE__, _("msg=<cap_int %d: %s>\n"), what, captext));
	544	cap_free(captext);
	545	#endif
	546	cap_free(caps);
	547	return 0;
	548	}
	549
	550	int sl_drop_cap_sub() { return sl_drop_cap_int(1); }
	551	int sl_get_cap_sub() { return sl_drop_cap_int(2); }
	552	int sl_drop_cap_qdel() { return sl_drop_cap_int(3); }
	553	int sl_get_cap_qdel() { return sl_drop_cap_int(4); }
	554
	555	#else
	556	int sl_drop_cap () { return 0; }
	557	int sl_drop_cap_sub() { return 0; }
	558	int sl_get_cap_sub() { return 0; }
	559	int sl_drop_cap_qdel() { return 0; }
	560	int sl_get_cap_qdel() { return 0; }
	561	#endif
	562
	563	/* ----------------------------------------------------------------
	564	*
	565	* String handling routines
	566	*
	567	* ---------------------------------------------------------------- */
	568
	569	/*
[76]	570	* Have memset in a different translation unit (i.e. this) to prevent
	571	* it to get optimized away
[1]	572	*/
	573	void sl_memset(void s, int c, size_t n)
	574	{
[76]	575	return memset(s, c,n);
[1]	576	}
	577
	578	#if !defined(HOST_IS_I86SOLARIS)
[25]	579	#if !defined (_GNU_SOURCE) && !defined(__linux__)
[22]	580	/* flawfinder: ignore */
[1]	581	extern int vsnprintf ( char *str, size_t n,
	582	const char *format, va_list ap );
	583	#endif
	584	#endif
	585
	586	#if !defined (VA_COPY)
	587	#if defined (__GNUC__) && defined (__PPC__) && (defined (_CALL_SYSV) \|\| defined (_WIN32))
	588	#define VA_COPY(ap1, ap2) ((ap1) = (ap2))
	589	#elif defined (VA_COPY_AS_ARRAY)
	590	#define VA_COPY(ap1, ap2) memmove ((ap1), (ap2), sizeof (va_list))
	591	#else /* va_list is a pointer */
	592	#define VA_COPY(ap1, ap2) ((ap1) = (ap2))
	593	#endif
	594	#endif
	595
	596	#if !defined(HAVE_VSNPRINTF) \|\| defined(HAVE_BROKEN_VSNPRINTF)
	597	static
	598	size_t sl_printf_count (const char * fmt, va_list vl)
	599	{
	600	size_t length = 1;
	601	int fini = 0;
	602	int islong = 0;
	603	int islonglong = 0;
	604	int islongdouble = 0;
	605	char * string_arg;
	606
	607	SL_ENTER(_("sl_printf_count"));
	608
	609	if (fmt == NULL)
	610	SL_IRETURN(SL_ENULL, _("sl_printf_count"));
	611
	612	while (*fmt) {
	613
	614	if ( (fmt) == '%' ) { / a format specifier */
	615
	616	fmt++; /* point to first char after '%' */
	617
	618	fini = 0;
	619	islong = 0;
	620	islongdouble = 0;
	621
	622	while (*fmt && (fini == 0) ) {
	623
	624	switch (*fmt) {
	625
	626	case '': / field width supplied by an integer */
	627	length = length + va_arg (vl, int);
	628	++fmt;
	629	break;
	630	case '1':
	631	case '2':
	632	case '3':
	633	case '4':
	634	case '5':
	635	case '6':
	636	case '7':
	637	case '8':
	638	case '9':
	639	length = length + strtol (fmt, (char**) &fmt, 10);
	640	/* strtol makes FastForward to first invalid char */
	641	break;
	642
	643	case 'l': /* 'long' modifier */
	644	if (islong == 0)
	645	islong = 1;
	646	else
	647	{
	648	islonglong = 1;
	649	islong = 0;
	650	}
	651	++fmt;
	652	break;
	653
	654	case 'L': /* 'long double' modifier */
	655	#ifdef HAVE_LONG_DOUBLE
	656	islongdouble = 1;
	657	#else
	658	islong = 1;
	659	#endif
	660	++fmt;
	661	break;
	662
	663	case 'd':
	664	case 'i':
	665	case 'o':
	666	case 'u':
	667	case 'x':
	668	case 'X':
	669	if (islonglong == 1)
	670	#ifdef HAVE_LONG_LONG
	671	(void) va_arg (vl, long long);
	672	#else
	673	(void) va_arg (vl, long);
	674	#endif
	675	else if (islong == 1)
	676	(void) va_arg (vl, long);
	677	else
	678	(void) va_arg (vl, int);
	679	islong = 0;
	680	islonglong = 0;
	681	length = length + 24;
	682	++fmt;
	683	fini = 1;
	684	break;
	685
	686	case 'D':
	687	case 'O':
	688	case 'U':
	689	(void) va_arg (vl, long);
	690	length = length + 24;
	691	fmt++;
	692	fini = 1;
	693	break;
	694
	695	case 'e':
	696	case 'E':
	697	case 'f':
	698	case 'g':
	699	#ifdef HAVE_LONG_DOUBLE
	700	if (islongdouble == 1) {
	701	(void) va_arg (vl, long double);
	702	islongdouble = 0;
	703	length = length + 20;
	704	}
	705	else
	706	#endif
	707	(void) va_arg (vl, double);
	708	length = length + 20;
	709	fini = 1;
	710	++fmt;
	711	break;
	712
	713	case 's':
	714	string_arg = va_arg (vl, char *);
	715	if (string_arg != NULL)
	716	length = length + sl_strlen (string_arg);
	717	else
	718	length = length + 16;
	719	fini = 1;
	720	++fmt;
	721	break;
	722
	723	case 'c':
	724	(void) va_arg (vl, int);
	725	length = length + 1;
	726	fini = 1;
	727	++fmt;
	728	break;
	729
	730	case 'p':
	731	case 'n':
	732	(void) va_arg (vl, void * );
	733	length = length + 32;
	734	fini = 1;
	735	++fmt;
	736	break;
	737
	738	case '%': /* %% will print '%' */
	739	length = length + 1;
	740	fini = 1;
	741	++fmt;
	742	break;
	743
	744	default:
	745	length = length + 1;
	746	++fmt;
	747	break;
	748
	749	} /* end switch */
	750	}
	751	/* end parsing a single format specifier */
	752	} else {
	753	length = length + 1;
	754	fmt++;
	755	}
	756	}
	757	SL_IRETURN(length, _("sl_printf_count"));
	758	}
	759	#endif /* #ifndef HAVE_VSNPRINTF */
	760
	761	/*
	762	* An implementation of vsnprintf. va_start/va_end are in the caller
	763	* function.
	764	* Returns C99 (#bytes that would heve been written) on success.
	765	*/
	766	int sl_vsnprintf(char *str, size_t n,
	767	const char *format, va_list vl )
	768	{
	769	int len = 0;
	770	#if !defined(HAVE_VSNPRINTF) \|\| defined(HAVE_BROKEN_VSNPRINTF)
	771	size_t total;
	772	va_list vl2;
	773	#endif
	774
	775	SL_ENTER(_("sl_vsnprintf"));
	776	if (str == NULL \|\| format == NULL)
	777	SL_IRETURN(0, _("sl_vsnprintf"));
	778
	779	#if defined(HAVE_VSNPRINTF) && !defined(HAVE_BROKEN_VSNPRINTF)
[22]	780	len = vsnprintf (str, n, format, vl); /* flawfinder: ignore */
[1]	781	str[n-1] = '\0';
	782	#else
[22]	783	VA_COPY (vl2, vl); /* save the argument list */
[1]	784	total = sl_printf_count (format, vl);
[22]	785	len = (int) total;
[1]	786	if (total < n)
	787	{
[22]	788	/* flawfinder: ignore */
[1]	789	vsprintf (str, format, vl2); /* program has checked that it fits */
	790	str[n-1] = '\0';
	791	}
	792	else
	793	{
	794	sl_strlcpy (str, format, n);
	795	va_end(vl2);
	796	SL_IRETURN(len, _("sl_vsnprintf"));
	797	}
	798	va_end(vl2);
	799	#endif
	800	SL_IRETURN(len, _("sl_vsnprintf"));
	801	}
	802
	803	/*
	804	* An implementation of snprintf.
	805	* Returns SL_ENONE on success.
	806	* ENULL: src \|\| format == NULL
	807	* ERANGE: n out of range
[22]	808	* ETRUNC: truncated (unimplemented)
[1]	809	*/
	810	int sl_snprintf(char *str, size_t n,
	811	const char *format, ... )
	812	{
	813	va_list vl;
	814	#if !defined(HAVE_VSNPRINTF) \|\| defined(HAVE_BROKEN_VSNPRINTF)
	815	size_t total = 0;
	816	va_list vl2;
	817	#endif
	818
	819	SL_ENTER(_("sl_snprintf"));
	820	if (str == NULL \|\| format == NULL)
	821	SL_IRETURN(SL_ENULL, _("sl_snprintf"));
	822
	823	va_start (vl, format);
	824	#if defined(HAVE_VSNPRINTF) && !defined(HAVE_BROKEN_VSNPRINTF)
[22]	825	/* flawfinder: ignore */
[1]	826	vsnprintf (str, n, format, vl);
	827	str[n-1] = '\0';
	828	#else
	829	VA_COPY (vl2, vl); /* save the argument list */
	830	total = sl_printf_count (format, vl);
	831	if (total < n)
	832	{
[22]	833	/* flawfinder: ignore */
[1]	834	vsprintf (str, format, vl2); /* program has checked that it fits */
	835	str[n-1] = '\0';
	836	}
	837	else
	838	{
	839	sl_strlcpy (str, format, n);
	840	va_end(vl2);
	841	va_end(vl);
	842	SL_IRETURN(SL_ETRUNC, _("sl_snprintf"));
	843	}
	844	va_end(vl2);
	845	#endif
	846	va_end(vl);
	847	SL_IRETURN(SL_ENONE, _("sl_snprintf"));
	848	}
	849
	850	/*
	851	* Appends src to string dst of size siz (unlike strncat, siz is the
	852	* full size of dst, not space left). At most siz-1 characters
	853	* will be copied. Always NUL terminates (unless siz == 0).
	854	* Returns SL_NONE on success, errcode on failure.
	855	*
	856	* ENULL: dst == NULL
	857	* ERANGE: siz out of range
	858	* ETRUNC: src truncated
	859	*/
	860	int sl_strlcat(char * dst, /@null@/const char *src, size_t siz)
	861	{
	862	register size_t dst_end;
	863	register size_t dst_free;
	864
	865	register char * p;
	866	register const char * q;
	867
[76]	868	if (!(dst == NULL \|\| src == NULL \|\| *src == '\0'))
	869	{
	870	if (siz > 0)
	871	{
[1]	872
[76]	873	/* How much free space do we have ?
	874	*/
	875	dst_end = strlen(dst);
	876	dst_free = siz - dst_end - 1;
	877
	878	p = &dst[dst_end];
	879	q = src;
	880
	881	while (dst_free > 0 && *q != '\0')
	882	{
	883	p++ = q++;
	884	--dst_free;
	885	}
	886
	887	/* NULL terminate dst.
	888	*/
	889	*p = '\0';
	890
	891	if (*q == '\0')
	892	return SL_ENONE;
	893	else
	894	return SL_ETRUNC;
	895	}
	896	}
[1]	897	return SL_ENONE;
	898	}
	899
	900	/*
	901	* An alternative implementation of the OpenBSD strlcpy() function.
	902	*
	903	* Copy src to string dst of size siz. At most siz-1 characters
	904	* will be copied. Always NUL terminates (unless siz == 0).
	905	* Returns SL_NONE on success, errcode on failure.
	906	*
	907	* ENULL: dst == NULL
	908	* ERANGE: siz out of range
	909	* ETRUNC: src truncated
	910	*/
	911	int sl_strlcpy(char * dst, /@null@/const char * src, size_t siz)
	912	{
	913	/* SL_ENTER(_("sl_strlcpy")); */
	914
[76]	915	if (!((dst == NULL) \|\| (src == NULL)))
	916	{
	917	if (siz > 0) {
	918	/* copy siz-1 characters
	919	*/
	920	(void) strncpy(dst, src, siz-1);
	921
	922	/* NULL terminate
	923	*/
	924	dst[siz-1] = '\0';
	925	}
	926	return SL_ENONE;
	927	}
	928	else if (src == NULL)
	929	{
[1]	930	if (siz > 0)
	931	dst[0] = '\0';
	932	return SL_ENONE;
	933	}
[76]	934	else
	935	{
	936	return SL_ENULL;
	937	}
[1]	938	}
	939
	940	/*
	941	* A robust drop-in replacement of strncpy. strlcpy is preferable.
	942	*/
	943	char * sl_strncpy(char dst, const char src, size_t size)
	944	{
	945
	946	#ifdef SL_FAIL_ON_ERROR
	947	SL_REQUIRE(dst != NULL, _("dst != NULL"));
	948	SL_REQUIRE(src != NULL, _("src != NULL"));
	949	SL_REQUIRE(size > 0, _("size > 0"));
	950	#endif
	951
	952	if (dst == NULL)
	953	{
	954	sl_errno = SL_ENULL;
	955	return (NULL);
	956	}
	957	if (size < 1)
	958	{
	959	sl_errno = SL_ERANGE;
	960	return (dst);
	961	}
	962	if (!src)
	963	{
	964	sl_errno = SL_ENULL;
	965	dst[0] = '\0';
	966	}
	967	else if (src[0] == '\0')
	968	dst[0] = '\0';
	969	else
	970	strncpy(dst, src, size);
	971
	972	if (sl_strlen(src) >= size)
	973	{
	974	errno = ENOSPC;
	975	dst[size-1] = '\0';
	976	}
	977	return (dst);
	978	}
	979
	980	/*
	981	* A robust drop-in replacement of strncat. strlcat is preferable.
	982	*/
	983	char * sl_strncat(char dst, const char src, size_t n)
	984	{
	985	#ifdef SL_FAIL_ON_ERROR
	986	SL_REQUIRE(dst != NULL, _("dst != NULL"));
	987	SL_REQUIRE(src != NULL, _("src != NULL"));
	988	SL_REQUIRE(n > 0, _("n > 0"));
	989	#endif
	990
	991	if (dst == NULL)
	992	{
	993	sl_errno = SL_ENULL;
	994	return (NULL);
	995	}
	996	if (n < 1)
	997	{
	998	sl_errno = SL_ERANGE;
	999	return (dst);
	1000	}
	1001	if (!src)
	1002	{
	1003	sl_errno = SL_ENULL;
	1004	return (dst);
	1005	}
	1006	else if (src[0] == '\0')
	1007	dst[0] = '\0';
	1008	else
	1009	strncat(dst, src, n);
	1010
	1011	return (dst);
	1012	}
	1013
	1014
	1015	int sl_strcmp(const char * a, const char * b)
	1016	{
	1017	#ifdef SL_FAIL_ON_ERROR
	1018	SL_REQUIRE (a != NULL, _("a != NULL"));
	1019	SL_REQUIRE (b != NULL, _("b != NULL"));
	1020	#endif
	1021
	1022	if (a != NULL && b != NULL)
	1023	return (strcmp(a, b));
	1024	else if (a == NULL && b != NULL)
	1025	return (-1);
	1026	else if (a != NULL && b == NULL)
	1027	return (1);
	1028	else
	1029	return (-7); /* arbitrary */
	1030	}
	1031
	1032	int sl_strncmp(const char * a, const char * b, size_t n)
	1033	{
	1034	#ifdef SL_FAIL_ON_ERROR
	1035	SL_REQUIRE (a != NULL, _("a != NULL"));
	1036	SL_REQUIRE (b != NULL, _("b != NULL"));
	1037	SL_REQUIRE (n > 0, _("n > 0"));
	1038	#endif
	1039
	1040	if (a != NULL && b != NULL)
	1041	return (strncmp(a, b, n));
	1042	else if (a == NULL && b != NULL)
	1043	return (-1);
	1044	else if (a != NULL && b == NULL)
	1045	return (1);
	1046	else
	1047	return (-7); /* arbitrary */
	1048	}
	1049
	1050	/* string searching
	1051	*/
	1052
	1053	char * sl_strstr (const char * haystack, const char * needle)
	1054	{
	1055	#ifndef HAVE_STRSTR
	1056	int i;
	1057	size_t needle_len;
	1058	size_t haystack_len;
	1059	#endif
	1060
	1061	if (haystack == NULL \|\| needle == NULL)
	1062	return NULL;
	1063	if (needle == '\0' \|\| haystack == '\0')
	1064	return NULL;
	1065
	1066	#if defined(HAVE_STRSTR)
	1067	return (strstr(haystack, needle));
	1068	#else
	1069	needle_len = strlen(needle);
	1070	haystack_len = strlen(haystack);
	1071
	1072	for (i = 0; i <= (haystack_len-needle_len); ++i)
	1073	if (0 == sl_strncmp(&haystack[i], needle, needle_len))
	1074	return (needle);
	1075	return NULL;
	1076	#endif
	1077	}
	1078
	1079
	1080	/* ----------------------------------------------------------------
	1081	*
	1082	* Privilege handling routines
	1083	*
	1084	* ---------------------------------------------------------------- */
	1085
	1086
	1087
	1088	static uid_t euid;
	1089	static uid_t ruid;
	1090	static uid_t ruid_orig;
	1091	static gid_t egid;
	1092	static gid_t rgid;
	1093	static gid_t rgid_orig;
	1094
	1095	static int uids_are_stored = SL_FALSE;
	1096	static int suid_is_set = SL_TRUE;
	1097
	1098	#ifdef HAVE_SETRESUID
	1099	extern int setresuid (uid_t truid, uid_t teuid, uid_t tsuid);
	1100	extern int setresgid (gid_t trgid, gid_t tegid, gid_t tsgid);
	1101	#endif
	1102
	1103
	1104	/*
	1105	* This function returns true if the program is SUID.
	1106	* It calls abort() if the uid's are not saved already.
	1107	*/
	1108	int sl_is_suid()
	1109	{
	1110	if (uids_are_stored == SL_FALSE)
	1111	{
	1112	if (getuid() == geteuid() && getgid() == getegid())
	1113	return (0); /* FALSE */
	1114	else
	1115	return (1); /* TRUE */
	1116	}
	1117	else
	1118	{
	1119	if (euid == ruid && egid == rgid)
	1120	return (0); /* FALSE */
	1121	else
	1122	return (1); /* TRUE */
	1123	}
	1124	}
	1125
	1126	/*
	1127	* This function returns the saved euid.
	1128	* It calls abort() if the uid's are not saved already.
	1129	*/
	1130	int sl_get_euid(uid_t * ret)
	1131	{
	1132	SL_ENTER(_("sl_get_euid"));
	1133	/* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
	1134	if (uids_are_stored == SL_TRUE)
	1135	*ret = euid;
	1136	else
	1137	*ret = geteuid();
	1138	SL_IRETURN (SL_ENONE, _("sl_get_euid"));
	1139	}
	1140
	1141	uid_t sl_ret_euid()
	1142	{
	1143	/* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
	1144	if (uids_are_stored == SL_TRUE)
	1145	return (euid);
	1146	else
	1147	return (geteuid());
	1148	}
	1149
	1150	/*
	1151	* This function returns the saved egid.
	1152	* It calls abort() if the uid's are not saved already.
	1153	*/
	1154	int sl_get_egid(gid_t * ret)
	1155	{
	1156	SL_ENTER(_("sl_get_egid"));
	1157	/* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
	1158	if (uids_are_stored == SL_TRUE)
	1159	*ret = egid;
	1160	else
	1161	*ret = getegid();
	1162	SL_IRETURN (SL_ENONE, _("sl_get_egid"));
	1163	}
	1164
	1165	/*
	1166	* This function returns the saved ruid.
	1167	* It calls abort() if the uid's are not saved already.
	1168	*/
	1169	int sl_get_ruid(uid_t * ret)
	1170	{
	1171	SL_ENTER(_("sl_get_ruid"));
	1172	/* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
	1173	if (uids_are_stored == SL_TRUE)
	1174	*ret = ruid;
	1175	else
	1176	*ret = getuid();
	1177	SL_IRETURN (SL_ENONE, _("sl_get_ruid"));
	1178	}
	1179
	1180	/*
	1181	* This function returns the saved rgid.
	1182	* It calls abort() if the uid's are not saved already.
	1183	*/
	1184	int sl_get_rgid(gid_t * ret)
	1185	{
	1186	SL_ENTER(_("sl_get_rgid"));
	1187	/* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
	1188	if (uids_are_stored == SL_TRUE)
	1189	*ret = rgid;
	1190	else
	1191	*ret = getgid();
	1192	SL_IRETURN (SL_ENONE, _("sl_get_rgid"));
	1193	}
	1194
	1195	/*
	1196	* This function returns the saved original ruid.
	1197	* It calls abort() if the uid's are not saved already.
	1198	*/
	1199	int sl_get_ruid_orig(uid_t * ret)
	1200	{
	1201	SL_ENTER(_("sl_get_ruid_orig"));
	1202	/* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
	1203	if (uids_are_stored == SL_TRUE)
	1204	*ret = ruid_orig;
	1205	else
	1206	*ret = getuid();
	1207	SL_IRETURN (SL_ENONE, _("sl_get_ruid_orig"));
	1208	}
	1209
	1210	/*
	1211	* This function returns the saved original rgid.
	1212	* It calls abort() if the uid's are not saved already.
	1213	*/
	1214	int sl_get_rgid_orig(gid_t * ret)
	1215	{
	1216	SL_ENTER(_("sl_get_rgid_orig"));
	1217	/* SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));*/
	1218	if (uids_are_stored == SL_TRUE)
	1219	*ret = rgid_orig;
	1220	else
	1221	*ret = getgid();
	1222	SL_IRETURN (SL_ENONE, _("sl_get_rgid_orig"));
	1223	}
	1224
	1225	static int suid_warn_flag = 1;
	1226	static void suid_warn(int a)
	1227	{
	1228	fprintf(stderr, _("ERROR: open set/unset suid !!! %d\n"), a);
	1229	return;
	1230	}
	1231
	1232	/*
	1233	* This function sets the effective uid
	1234	* to the saved effective uid.
	1235	* It will abort on failure.
	1236	*/
	1237	int sl_set_suid ()
	1238	{
	1239	int retval;
	1240
	1241	SL_ENTER(_("sl_set_suid"));
	1242
	1243	if (uids_are_stored == SL_FALSE)
	1244	{
	1245	SL_IRETURN(SL_ENONE, _("sl_set_suid"));
	1246	}
	1247
	1248	SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));
	1249
	1250	if (ruid == euid && rgid == egid)
	1251	{
	1252	suid_is_set = SL_TRUE;
	1253	SL_IRETURN(SL_ENONE, _("sl_set_suid"));
	1254	}
	1255	SL_REQUIRE(suid_is_set == SL_FALSE, _("suid_is_set == SL_FALSE"));
	1256
	1257	#if defined(HAVE_SETRESUID)
	1258	retval = setresuid (sh_uid_neg, euid, sh_uid_neg);
	1259	if (retval == 0)
	1260	retval = setresgid (sh_gid_neg, egid, sh_gid_neg);
	1261
	1262	#elif defined(HAVE_SETEUID)
	1263	retval = seteuid (egid);
	1264	if (retval == 0)
	1265	retval = setegid (euid);
	1266
	1267	/* on AIX, setreuid does not behave well for non-root users.
	1268	*/
	1269	#elif defined(HAVE_SETREUID)
	1270	retval = setreuid (ruid, euid);
	1271	if (retval == 0)
	1272	retval = setregid (rgid, egid);
	1273
	1274	#else
	1275	retval = setuid (euid);
	1276	if (retval == 0)
	1277	retval = setgid (egid);
	1278	#endif
	1279	if (suid_warn_flag == 1)
	1280	suid_warn(1);
	1281	suid_warn_flag = 1;
	1282
	1283	SL_REQUIRE(retval == 0, _("retval == 0"));
	1284	suid_is_set = SL_TRUE;
	1285	SL_IRETURN(SL_ENONE, _("sl_set_suid"));
	1286	}
	1287
	1288	/*
	1289	* This function sets the effective uid to the real uid.
	1290	* It will abort on failure.
	1291	*/
	1292	int sl_unset_suid ()
	1293	{
	1294	register int retval;
	1295
	1296	SL_ENTER(_("sl_unset_suid"));
	1297
	1298	if (uids_are_stored == SL_FALSE)
	1299	{
	1300	SL_IRETURN(SL_ENONE, _("sl_unset_suid"));
	1301	}
	1302
	1303	SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));
	1304
	1305	if (ruid == euid && rgid == egid)
	1306	{
	1307	suid_is_set = SL_FALSE;
	1308	SL_IRETURN(SL_ENONE, _("sl_unset_suid"));
	1309	}
	1310	SL_REQUIRE(suid_is_set == SL_TRUE, _("suid_is_set == SL_TRUE"));
	1311
	1312	#if defined(HAVE_SETRESUID)
	1313	retval = setresgid (sh_gid_neg, rgid, sh_gid_neg);
	1314	if (retval == 0)
	1315	retval = setresuid (sh_uid_neg, ruid, sh_uid_neg);
	1316
	1317	#elif defined(HAVE_SETEUID)
	1318	retval = setegid (rgid);
	1319	if (retval == 0)
	1320	retval = seteuid (ruid);
	1321
	1322	#elif defined(HAVE_SETREUID)
	1323	retval = setregid (egid, rgid);
	1324	if (retval == 0)
	1325	retval = setreuid (euid, ruid);
	1326
	1327	#else
	1328	retval = setgid (rgid);
	1329	if (retval == 0)
	1330	retval = setuid (ruid);
	1331	#endif
	1332
	1333	if (suid_warn_flag == 0)
	1334	suid_warn(0);
	1335	suid_warn_flag = 0;
	1336
	1337	SL_REQUIRE(retval == 0, _("retval == 0"));
	1338	suid_is_set = SL_FALSE;
	1339	SL_IRETURN(SL_ENONE, _("sl_unset_suid"));
	1340	}
	1341
	1342
	1343	/*
	1344	* This function saves the uid's.
	1345	*/
	1346	int sl_save_uids()
	1347	{
	1348	SL_ENTER(_("sl_save_uids"));
	1349	if (uids_are_stored == SL_TRUE)
	1350	SL_IRETURN(SL_EREPEAT, _("sl_save_uids"));
	1351
	1352	ruid_orig = getuid();
	1353	rgid_orig = getgid();
	1354	egid = getegid();
	1355	euid = geteuid();
	1356	ruid = ruid_orig;
	1357	rgid = rgid_orig;
	1358	uids_are_stored = SL_TRUE;
	1359
	1360	SL_IRETURN(SL_ENONE, _("sl_save_uids"));
	1361	}
	1362
	1363	/*
	1364	* This function drops SUID privileges irrevocably.
	1365	* It set the effective uid to the original real uid.
	1366	*/
	1367	extern int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid);
	1368	int sl_drop_privileges()
	1369	{
	1370	SL_ENTER(_("sl_drop_privileges"));
	1371	SL_REQUIRE(uids_are_stored == SL_TRUE, _("uids_are_stored == SL_TRUE"));
	1372
	1373	SL_REQUIRE(setgid(rgid_orig) == 0, _("setgid(rgid_orig) == 0"));
	1374	SL_REQUIRE(sh_unix_initgroups2(ruid_orig, rgid_orig) == 0, _("sh_unix_initgroups2(ruid_orig,rgid_orig) == 0"));
	1375	SL_REQUIRE(setuid(ruid_orig) == 0, _("setuid(ruid_orig) == 0"));
	1376
	1377	/* make sure that setuid(0) fails
	1378	*/
	1379	SL_REQUIRE(setuid(0) < 0, _("setuid(0) < 0"));
	1380
	1381	euid = ruid_orig;
	1382	egid = rgid_orig;
	1383	ruid = ruid_orig;
	1384	rgid = rgid_orig;
	1385
	1386	SL_IRETURN(SL_ENONE, _("sl_drop_privileges"));
	1387	}
	1388
	1389	/*
	1390	* Define a policy: Stay root.
	1391	* Do nothing if not SUID.
	1392	*/
	1393	int sl_policy_get_root()
	1394	{
	1395	SL_ENTER(_("sl_policy_get_root"));
	1396	SL_REQUIRE(uids_are_stored == SL_FALSE, _("uids_are_stored == SL_FALSE"));
	1397
	1398	SL_REQUIRE (sl_save_uids() == SL_ENONE, _("sl_save_uids() == SL_ENONE"));
	1399
	1400	if (euid != ruid \|\| egid != rgid)
	1401	{
	1402	SL_REQUIRE(setgid(egid) == 0, _("setgid(egid) == 0"));
	1403	SL_REQUIRE(setuid(euid) == 0, _("setuid(euid) == 0"));
	1404	SL_REQUIRE(ruid == getuid() && rgid == getgid(),
	1405	_("ruid == getuid() && rgid == getgid()"));
	1406	ruid = euid;
	1407	rgid = egid;
	1408	}
	1409	suid_is_set = SL_TRUE;
	1410	if (euid == 0)
	1411	{
	1412	SL_REQUIRE(sh_unix_initgroups2(euid, egid) == 0, _("sh_unix_initgroups2(euid,egid) == 0"));
	1413	}
	1414	SL_IRETURN(SL_ENONE, _("sl_policy_get_root"));
	1415	}
	1416
	1417	#include <pwd.h>
	1418
	1419	/*
	1420	* Define a policy: Get real (irrevocably).
	1421	* This function drops SUID privileges irrevocably.
	1422	* Do nothing if not SUID (? not true - drops if root).
	1423	*/
	1424
	1425	int sl_policy_get_real(char * user)
	1426	{
	1427	struct passwd * tempres;
	1428
	1429	SL_ENTER(_("sl_policy_get_real"));
	1430	SL_REQUIRE(uids_are_stored == SL_FALSE, _("uids_are_stored == SL_FALSE"));
	1431	SL_REQUIRE (sl_save_uids() == SL_ENONE, _("sl_save_uids() == SL_ENONE"));
	1432
	1433	if (euid == 0 \|\| ruid == 0)
	1434	{
	1435	tempres = sh_getpwnam(user);
	1436
	1437	SL_REQUIRE (NULL != tempres, _("tempres != NULL"));
	1438
	1439	rgid_orig = tempres->pw_gid;
	1440	ruid_orig = tempres->pw_uid;
	1441	}
	1442	else
	1443	{
	1444	rgid_orig = rgid;
	1445	ruid_orig = ruid;
	1446	}
	1447
	1448	SL_REQUIRE (sl_drop_privileges() == SL_ENONE,
	1449	_("sl_drop_privileges() == SL_ENONE"));
	1450
	1451	suid_is_set = SL_TRUE;
	1452	SL_IRETURN(SL_ENONE, _("sl_policy_get_real"));
	1453	}
	1454
	1455
	1456	/*
	1457	* Define a policy: Get user.
	1458	* Drops privileges.
	1459	* Do nothing if not SUID.
	1460	*/
	1461	int sl_policy_get_user(char * user)
	1462	{
	1463	struct passwd * tempres;
	1464
	1465	SL_ENTER(_("sl_policy_get_user"));
	1466
	1467	SL_REQUIRE(user != NULL, _("user != NULL"));
	1468	SL_REQUIRE(uids_are_stored == SL_FALSE, _("uids_are_stored == SL_FALSE"));
	1469	SL_REQUIRE (sl_save_uids() == SL_ENONE, _("sl_save_uids() == SL_ENONE"));
	1470
	1471	if (euid != ruid \|\| egid != rgid)
	1472	{
	1473	tempres = sh_getpwnam(user);
	1474
	1475	SL_REQUIRE (NULL != tempres, _("tempres != NULL"));
	1476
	1477	#if 0
	1478	rgid = tempres->pw_gid;
	1479	ruid = tempres->pw_uid;
	1480	SL_REQUIRE(sl_unset_suid() == SL_ENONE,
	1481	_("sl_unset_suid() == SL_ENONE"));
	1482	#endif
	1483	SL_REQUIRE (sl_drop_privileges() == SL_ENONE,
	1484	_("sl_drop_privileges() == SL_ENONE"));
	1485	}
	1486	SL_IRETURN(SL_ENONE, _("sl_policy_get_user"));
	1487	}
	1488
	1489
	1490
	1491	/* ----------------------------------------------------------------
	1492	*
	1493	* File access routines
	1494	*
	1495	* ---------------------------------------------------------------- */
	1496
	1497	#define TOFFSET 0x1234
	1498
	1499	/* this would prevent opening files if the first 16 fds are open :( */
	1500	/* #define MAXFD FOPEN_MAX */
	1501
	1502	#define MAXFD 1024
	1503
	1504	typedef struct openfiles {
	1505	SL_TICKET ticket; /* The unique ID. */
	1506	int fd; /* The file descriptor. */
	1507	char * path; /* The file path. */
	1508	} SL_OFILE;
	1509
	1510	static SL_OFILE * ofiles[MAXFD];
	1511
	1512
	1513	static unsigned int nonce_counter = TOFFSET;
	1514
	1515	static
	1516	SL_TICKET sl_create_ticket (unsigned int myindex)
	1517	{
	1518	unsigned int high; /* index */
	1519	unsigned int low; /* nonce */
	1520
	1521	SL_ENTER(_("sl_create_ticket"));
	1522
	1523	if (myindex >= MAXFD)
	1524	SL_IRETURN (SL_EINTERNAL, _("sl_create_ticket"));
	1525
	1526	/* mask out the high bit and check that it is not used
	1527	* -> verify that it fits into 16 bits as positive
	1528	*/
	1529	high = (myindex + TOFFSET) & 0x7fff;
	1530
	1531	if (high != myindex + TOFFSET)
	1532	SL_IRETURN (SL_EINTERNAL, _("sl_create_ticket"));
	1533
	1534	low = nonce_counter & 0xffff;
	1535
	1536	/* Overflow -> nonce too big.
	1537	*/
	1538	if ((low != nonce_counter++) \|\| low == 0)
	1539	SL_IRETURN (SL_EINTERNAL, _("sl_create_ticket"));
	1540
	1541	/* Wrap around the nonce counter.
	1542	* This is a dirty trick.
	1543	*/
	1544	if (nonce_counter > 0x7fff)
	1545	nonce_counter = TOFFSET;
	1546
	1547	SL_RETURN ((SL_TICKET) ((high << 16) \| low), _("sl_create_ticket"));
	1548	}
	1549
	1550	static
	1551	int sl_read_ticket (SL_TICKET fno)
	1552	{
	1553	register unsigned myindex;
	1554	register SL_OFILE *of;
	1555
	1556	myindex = ((fno >> 16) & 0xffff) - TOFFSET;
	1557	if (myindex >= MAXFD)
	1558	return (SL_ETICKET);
	1559
	1560	if (ofiles[myindex] == NULL)
	1561	return (SL_ETICKET);
	1562
	1563	if (ofiles[myindex]->ticket != fno)
	1564	return (SL_ETICKET);
	1565
	1566	if ((of = ofiles[myindex])->fd < 0 \|\| of->fd >= MAXFD )
	1567	return (SL_EINTERNAL);
	1568
	1569	if (((of->ticket) & 0xffff) == 0)
	1570	return (SL_EINTERNAL);
	1571
	1572	return (myindex);
	1573	}
	1574
[76]	1575	SL_TICKET sl_make_ticket (int fd, const char * filename)
[1]	1576	{
[22]	1577	size_t len;
[1]	1578	SL_TICKET ticket;
	1579	SL_ENTER(_("sl_make_ticket"));
	1580	/* Make entry.
	1581	*/
	1582	if (fd >= MAXFD \|\| fd < 0)
	1583	{
	1584	SL_IRETURN(SL_TOOMANY, _("sl_make_ticket"));
	1585	}
	1586
	1587	if (ofiles[fd] != NULL)
	1588	{
	1589	SL_IRETURN(SL_EINTERNAL, _("sl_make_ticket"));
	1590	}
	1591
	1592	if ( (ofiles[fd] = (SL_OFILE *) malloc(sizeof(SL_OFILE))) == NULL)
	1593	{
	1594	SL_IRETURN(SL_EMEM, _("sl_make_ticket"));
	1595	}
	1596
[22]	1597	len = sl_strlen(filename)+1;
	1598
	1599	if ( (ofiles[fd]->path = (char *) malloc(len) ) == NULL)
[1]	1600	{
	1601	free(ofiles[fd]);
	1602	ofiles[fd] = NULL;
	1603	SL_IRETURN(SL_EMEM, _("sl_make_ticket"));
	1604	}
	1605
	1606	/* Get a ticket.
	1607	*/
	1608	ticket = sl_create_ticket((unsigned int)fd);
	1609
	1610	if (SL_ISERROR(ticket))
	1611	{
	1612	(void) free (ofiles[fd]->path);
	1613	(void) free (ofiles[fd]);
	1614	SL_IRETURN(ticket, _("sl_make_ticket"));
	1615	}
	1616
[22]	1617	sl_strlcpy (ofiles[fd]->path, filename, len);
[1]	1618	ofiles[fd]->ticket = ticket;
	1619	ofiles[fd]->fd = fd;
	1620
	1621	SL_IRETURN(ticket, _("sl_make_ticket"));
	1622	}
	1623
	1624	#define SL_OPEN_MIN 113
	1625	#define SL_OPEN_FOR_READ 113
	1626	#define SL_OPEN_FOR_WRITE 114
	1627	#define SL_OPEN_FOR_RDWR 115
	1628	#define SL_OPEN_FOR_WTRUNC 116
	1629	#define SL_OPEN_FOR_RWTRUNC 117
	1630	#define SL_OPEN_SAFE_RDWR 118
	1631	#define SL_OPEN_FOR_FASTREAD 119
	1632	#define SL_OPEN_MAX 119
	1633
	1634	#if !defined(O_NOATIME)
	1635	#if defined(__linux__) && (defined(__i386__) \|\| defined(__PPC__))
	1636	#define O_NOATIME 01000000
	1637	#else
	1638	/*
	1639	* bitwise 'or' with zero does not modify any bit
	1640	*/
	1641	#define O_NOATIME 0
	1642	#endif
	1643	#endif
	1644
	1645	static int o_noatime = O_NOATIME;
	1646	static mode_t open_mode = (S_IWUSR\|S_IRUSR\|S_IRGRP);
	1647
	1648
	1649	static
[20]	1650	int sl_open_file (const char *filename, int mode, int priv)
[1]	1651	{
	1652	struct stat lbuf;
	1653	struct stat buf;
	1654	int lstat_return;
	1655	int stat_return;
	1656	int fd;
	1657	int sflags;
[22]	1658	size_t len;
[1]	1659	SL_TICKET ticket;
	1660
	1661	#if !defined(O_NONBLOCK)
	1662	#if defined(O_NDELAY)
	1663	#define O_NONBLOCK O_NDELAY
	1664	#else
	1665	#define O_NONBLOCK 0
	1666	#endif
	1667	#endif
	1668
	1669	SL_ENTER(_("sl_open_file"));
	1670
	1671	if (filename == NULL)
	1672	SL_IRETURN(SL_ENULL, _("sl_open_file"));
	1673	if (mode < SL_OPEN_MIN \|\| mode > SL_OPEN_MAX)
	1674	SL_IRETURN(SL_EINTERNAL, _("sl_open_file"));
	1675
	1676	/* "This system call always succeeds and the previous value of
	1677	* the mask is returned."
	1678	*/
	1679	(void) umask (0);
	1680
	1681	if (mode == SL_OPEN_FOR_FASTREAD)
	1682	{
	1683	fd = aud_open_noatime (FIL__, __LINE__, priv, filename,
	1684	O_RDONLY\|O_NONBLOCK, 0, &o_noatime);
[8]	1685	/*
[1]	1686	if (fd >= 0) {
	1687	sflags = retry_fcntl(FIL__, __LINE__, fd, F_GETFL, 0);
	1688	retry_fcntl(FIL__, __LINE__, fd, F_SETFL, sflags & ~O_NONBLOCK);
	1689	}
[8]	1690	*/
[1]	1691	if (fd < 0)
	1692	SL_IRETURN(SL_EBADFILE, _("sl_open_file"));
	1693	goto createTicket;
	1694	}
	1695
	1696	#ifdef USE_SUID
	1697	if (priv == SL_YESPRIV)
	1698	sl_set_suid();
	1699	#endif
	1700	if (mode == SL_OPEN_FOR_READ)
	1701	lstat_return = retry_stat (FIL__, __LINE__, filename, &lbuf);
	1702	else
	1703	lstat_return = retry_lstat(FIL__, __LINE__, filename, &lbuf);
	1704	#ifdef USE_SUID
	1705	if (priv == SL_YESPRIV)
	1706	sl_unset_suid();
	1707	#endif
	1708
	1709	if (lstat_return == -1)
	1710	{
	1711	lstat_return = ENOENT;
	1712	if ( (mode == SL_OPEN_FOR_READ && lstat_return == ENOENT) \|\|
	1713	(errno != ENOENT))
	1714	{
	1715	TPT(( 0, FIL__, __LINE__, _("msg=<lstat: %s> errno=<%d>\n"),
	1716	filename, errno));
	1717	SL_IRETURN(SL_EBADFILE, _("sl_open_file"));
	1718	}
	1719	}
	1720
	1721	if ( (mode != SL_OPEN_FOR_READ) && (lstat_return != ENOENT) &&
	1722	( S_ISDIR(lbuf.st_mode) \|\| (S_IWOTH & lbuf.st_mode) )
	1723	)
	1724	SL_IRETURN(SL_EBADFILE, _("sl_open_file"));
	1725
	1726
	1727	/* O_NOATIME has an effect for read(). But write() ?.
	1728	*/
	1729	switch (mode)
	1730	{
	1731	case SL_OPEN_FOR_READ:
	1732	fd = aud_open_noatime (FIL__, __LINE__, priv, filename,
	1733	O_RDONLY\|O_NONBLOCK, 0, &o_noatime);
	1734	if (fd >= 0) {
	1735	sflags = retry_fcntl(FIL__, __LINE__, fd, F_GETFL, 0);
	1736	retry_fcntl(FIL__, __LINE__, fd, F_SETFL, sflags & ~O_NONBLOCK);
	1737	}
	1738	break;
	1739	case SL_OPEN_FOR_WRITE:
	1740	if (lstat_return == ENOENT)
	1741	fd = aud_open (FIL__, __LINE__, priv, filename,
	1742	O_WRONLY\|O_CREAT\|O_EXCL, open_mode);
	1743	else
	1744	fd = aud_open (FIL__, __LINE__, priv, filename,
	1745	O_WRONLY, open_mode);
	1746	break;
	1747	case SL_OPEN_SAFE_RDWR:
	1748	if (lstat_return == ENOENT)
	1749	fd = aud_open (FIL__, __LINE__, priv, filename,
	1750	O_RDWR\|O_CREAT\|O_EXCL, open_mode);
	1751	else
	1752	SL_IRETURN(SL_EBADFILE, _("sl_open_file"));
	1753	break;
	1754	case SL_OPEN_FOR_RDWR:
	1755	if (lstat_return == ENOENT)
	1756	fd = aud_open (FIL__, __LINE__, priv, filename,
	1757	O_RDWR\|O_CREAT\|O_EXCL, open_mode);
	1758	else
	1759	fd = aud_open (FIL__, __LINE__, priv, filename,
	1760	O_RDWR, open_mode);
	1761	break;
	1762	case SL_OPEN_FOR_WTRUNC:
	1763	if (lstat_return == ENOENT)
	1764	fd = aud_open (FIL__, __LINE__, priv, filename,
	1765	O_WRONLY\|O_CREAT\|O_EXCL, open_mode);
	1766	else
	1767	fd = aud_open (FIL__, __LINE__, priv, filename,
	1768	O_WRONLY\|O_TRUNC, open_mode);
	1769	break;
	1770	case SL_OPEN_FOR_RWTRUNC:
	1771	if (lstat_return == ENOENT)
	1772	fd = aud_open (FIL__, __LINE__, priv, filename,
	1773	O_RDWR\|O_CREAT\|O_EXCL, open_mode);
	1774	else
	1775	fd = aud_open (FIL__, __LINE__, priv, filename,
	1776	O_RDWR\|O_TRUNC, open_mode);
	1777	break;
	1778	default:
	1779	SL_IRETURN(SL_EINTERNAL, _("sl_open_file"));
	1780	}
	1781
	1782	if (fd < 0)
	1783	{
	1784	TPT(( 0, FIL__, __LINE__, _("msg=<Error opening: %s> errno=<%d>\n"),
	1785	filename, errno));
	1786	SL_IRETURN(SL_EBADFILE, _("sl_open_file"));
	1787	}
	1788
	1789	#ifdef USE_SUID
	1790	if (priv == SL_YESPRIV)
	1791	sl_set_suid();
	1792	#endif
	1793	stat_return = retry_fstat(FIL__, __LINE__, fd, &buf);
	1794	#ifdef USE_SUID
	1795	if (priv == SL_YESPRIV)
	1796	sl_unset_suid();
	1797	#endif
	1798
	1799	if (stat_return < 0)
	1800	{
	1801	close (fd);
	1802	SL_IRETURN(SL_EBADFILE, _("sl_open_file"));
	1803	}
	1804
	1805	if (lstat_return != ENOENT && buf.st_ino != lbuf.st_ino)
	1806	{
	1807	close (fd);
	1808	SL_IRETURN(SL_EBOGUS, _("sl_open_file"));
	1809	}
	1810
	1811	createTicket:
	1812
	1813	/* Make entry.
	1814	*/
	1815	if (fd >= MAXFD)
	1816	{
	1817	close(fd);
	1818	SL_IRETURN(SL_TOOMANY, _("sl_open_file"));
	1819	}
	1820
	1821	if (ofiles[fd] != NULL)
	1822	{
	1823	close(fd);
	1824	SL_IRETURN(SL_EINTERNAL, _("sl_open_file"));
	1825	}
	1826
	1827	if ( (ofiles[fd] = (SL_OFILE *) malloc(sizeof(SL_OFILE))) == NULL)
	1828	{
	1829	close(fd);
	1830	SL_IRETURN(SL_EMEM, _("sl_open_file"));
	1831	}
	1832
[22]	1833	len = sl_strlen(filename)+1;
	1834
	1835	if ( (ofiles[fd]->path = (char *) malloc(len) ) == NULL)
[1]	1836	{
	1837	free(ofiles[fd]);
	1838	ofiles[fd] = NULL;
	1839	close(fd);
	1840	SL_IRETURN(SL_EMEM, _("sl_open_file"));
	1841	}
	1842
	1843	/* Get a ticket.
	1844	*/
	1845	ticket = sl_create_ticket(fd);
	1846
	1847	if (SL_ISERROR(ticket))
	1848	{
	1849	(void) free (ofiles[fd]->path);
	1850	(void) free (ofiles[fd]);
	1851	close(fd);
	1852	SL_IRETURN(ticket, _("sl_open_file"));
	1853	}
	1854
[22]	1855	sl_strlcpy (ofiles[fd]->path, filename, len);
[1]	1856	ofiles[fd]->ticket = ticket;
	1857	ofiles[fd]->fd = fd;
	1858
	1859	SL_IRETURN(ticket, _("sl_open_file"));
	1860	}
	1861
	1862	static
[20]	1863	int check_fname_priv (const char * fname, int priv)
[1]	1864	{
	1865	SL_ENTER(_("check_fname_priv"));
	1866	if (fname == NULL)
	1867	SL_IRETURN(SL_ENULL, _("check_fname_priv"));
	1868	if (priv != SL_YESPRIV && priv != SL_NOPRIV)
	1869	SL_IRETURN(SL_EINTERNAL, _("check_fname_priv"));
	1870	SL_IRETURN(SL_ENONE, _("check_fname_priv"));
	1871	}
	1872
[20]	1873	SL_TICKET sl_open_write (const char * fname, int priv)
[1]	1874	{
	1875	long status;
	1876	SL_ENTER(_("sl_open_write"));
	1877
	1878	if (SL_ENONE != (status = check_fname_priv (fname, priv)))
	1879	SL_IRETURN(status, _("sl_open_write"));
	1880
	1881	status = sl_open_file(fname, SL_OPEN_FOR_WRITE, priv);
	1882	SL_IRETURN(status, _("sl_open_write"));
	1883	}
	1884
[20]	1885	SL_TICKET sl_open_read (const char * fname, int priv)
[1]	1886	{
	1887	long status;
	1888	SL_ENTER(_("sl_open_read"));
	1889
	1890	if (SL_ENONE != (status = check_fname_priv (fname, priv)))
	1891	{
	1892	TPT(( 0, FIL__, __LINE__,
	1893	_("msg=<Error in check_fname_priv.> status=<%ld>\n"),
	1894	status));
	1895	SL_IRETURN(status, _("sl_open_read"));
	1896	}
	1897
	1898	status = sl_open_file(fname, SL_OPEN_FOR_READ, priv);
	1899	SL_IRETURN(status, _("sl_open_read"));
	1900	}
	1901
[20]	1902	SL_TICKET sl_open_fastread (const char * fname, int priv)
[1]	1903	{
	1904	long status;
	1905	SL_ENTER(_("sl_open_fastread"));
	1906
	1907	if (SL_ENONE != (status = check_fname_priv (fname, priv)))
	1908	SL_IRETURN(status, _("sl_open_read"));
	1909
	1910	status = sl_open_file(fname, SL_OPEN_FOR_FASTREAD, priv);
	1911	SL_IRETURN(status, _("sl_open_fastread"));
	1912	}
	1913
[20]	1914	SL_TICKET sl_open_rdwr (const char * fname, int priv)
[1]	1915	{
	1916	long status;
	1917	SL_ENTER(_("sl_open_rdwr"));
	1918
	1919	if (SL_ENONE != (status = check_fname_priv (fname, priv)))
	1920	SL_IRETURN(status, _("sl_open_rdwr"));
	1921
	1922	status = sl_open_file(fname, SL_OPEN_FOR_RDWR, priv);
	1923	SL_IRETURN(status, _("sl_open_rdwr"));
	1924	}
	1925
[20]	1926	SL_TICKET sl_open_safe_rdwr (const char * fname, int priv)
[1]	1927	{
	1928	long status;
	1929	SL_ENTER(_("sl_open_safe_rdwr"));
	1930
	1931	if (SL_ENONE != (status = check_fname_priv (fname, priv)))
	1932	SL_IRETURN(status, _("sl_open_safe_rdwr"));
	1933
	1934	status = sl_open_file(fname, SL_OPEN_SAFE_RDWR, priv);
	1935	SL_IRETURN(status, _("sl_open_safe_rdwr"));
	1936	}
	1937
[20]	1938	SL_TICKET sl_open_write_trunc (const char * fname, int priv)
[1]	1939	{
	1940	long status;
	1941	SL_ENTER(_("sl_open_write_trunc"));
	1942
	1943	if (SL_ENONE != (status = check_fname_priv (fname, priv)))
	1944	SL_IRETURN(status, _("sl_open_write_trunc"));
	1945
	1946	status = sl_open_file(fname, SL_OPEN_FOR_WTRUNC, priv);
	1947	SL_IRETURN(status, _("sl_open_write_trunc"));
	1948	}
	1949
[20]	1950	SL_TICKET sl_open_rdwr_trunc (const char * fname, int priv)
[1]	1951	{
	1952	long status;
	1953	SL_ENTER(_("sl_open_rdwr_trunc"));
	1954
	1955	if (SL_ENONE != (status = check_fname_priv (fname, priv)))
	1956	SL_IRETURN(status, _("sl_open_rdwr_trunc"));
	1957
	1958	status = sl_open_file(fname, SL_OPEN_FOR_RWTRUNC, priv);
	1959	SL_IRETURN(status, _("sl_open_rdwr_trunc"));
	1960	}
	1961
	1962
	1963	int get_the_fd (SL_TICKET ticket)
	1964	{
	1965	int fd;
	1966
	1967	if (SL_ISERROR(fd = sl_read_ticket(ticket)))
	1968	return (fd);
	1969
	1970	if (ofiles[fd] == NULL \|\| fd != ofiles[fd]->fd \|\| fd < 0)
	1971	return (SL_EINTERNAL);
	1972	return (fd);
	1973	}
	1974
	1975	int sl_close (SL_TICKET ticket)
	1976	{
	1977	register int fd;
	1978
	1979	SL_ENTER(_("sl_close"));
	1980
	1981	if (SL_ISERROR(fd = get_the_fd (ticket)))
	1982	SL_IRETURN(fd, _("sl_close"));
	1983
	1984	/* This may fail, but what to do then ?
	1985	*/
	1986	if (0 != close(fd) && ofiles[fd] != NULL)
	1987	{
	1988	TPT((0, FIL__, __LINE__,
[29]	1989	_("msg=<Error closing file.>, path=<%s>, fd=<%d>, err=<%s>\n"),
	1990	ofiles[fd]->path, fd, strerror(errno)));
[1]	1991	}
	1992
	1993	if (ofiles[fd] != NULL)
	1994	{
	1995	(void) free(ofiles[fd]->path);
	1996	(void) free(ofiles[fd]);
	1997	ofiles[fd] = NULL;
	1998	}
	1999
	2000	SL_IRETURN(SL_ENONE, _("sl_close"));
	2001	}
	2002
	2003	int sl_dropall(int fd, int except)
	2004	{
	2005	while (fd < MAXFD)
	2006	{
	2007	if (ofiles[fd] != NULL && fd != except)
	2008	{
	2009	if (ofiles[fd]->path != NULL)
	2010	(void) free(ofiles[fd]->path);
	2011	(void) free(ofiles[fd]);
	2012	ofiles[fd] = NULL;
	2013	}
	2014	++fd;
	2015	}
	2016	return 0;
	2017	}
	2018
	2019
	2020	int sl_unlink (SL_TICKET ticket)
	2021	{
	2022	register int fd;
	2023
	2024	SL_ENTER(_("sl_unlink"));
	2025
	2026	if (SL_ISERROR(fd = get_the_fd(ticket)))
	2027	SL_IRETURN(fd, _("sl_unlink"));
	2028
	2029	if (retry_aud_unlink(FIL__, __LINE__, ofiles[fd]->path) < 0)
	2030	SL_IRETURN(SL_EUNLINK, _("sl_unlink"));
	2031
	2032	SL_IRETURN(SL_ENONE, _("sl_unlink"));
	2033	}
	2034
	2035
	2036	int sl_seek (SL_TICKET ticket, off_t off_data)
	2037	{
	2038	register int fd;
	2039
	2040	SL_ENTER(_("sl_seek"));
	2041
	2042	if (SL_ISERROR(fd = get_the_fd(ticket)))
	2043	SL_IRETURN(fd, _("sl_seek"));
	2044
	2045	if (lseek(fd, off_data, SEEK_SET) == (off_t)-1)
	2046	SL_IRETURN(SL_EREWIND, _("sl_seek"));
	2047
	2048	SL_IRETURN(SL_ENONE, _("sl_seek"));
	2049	}
	2050
	2051	int sl_rewind (SL_TICKET ticket)
	2052	{
	2053	register int fd;
	2054
	2055	SL_ENTER(_("sl_rewind"));
	2056
	2057	if (SL_ISERROR(fd = get_the_fd(ticket)))
	2058	SL_IRETURN(fd, _("sl_rewind"));
	2059
	2060	if (lseek (fd, 0L, SEEK_SET) == (off_t)-1)
	2061	SL_IRETURN(SL_EREWIND, _("sl_rewind"));
	2062
	2063	SL_IRETURN(SL_ENONE, _("sl_rewind"));
	2064	}
	2065
	2066	int sl_forward (SL_TICKET ticket)
	2067	{
	2068	register int fd;
	2069
	2070	SL_ENTER(_("sl_forward"));
	2071
	2072	if (SL_ISERROR(fd = get_the_fd(ticket)))
	2073	SL_IRETURN(fd, _("sl_forward"));
	2074
	2075	if (lseek (fd, 0L, SEEK_END) == (off_t)-1)
	2076	SL_IRETURN(SL_EFORWARD, _("sl_forward"));
	2077
	2078	SL_IRETURN(SL_ENONE, _("sl_forward"));
	2079	}
	2080
	2081
	2082	int sl_sync (SL_TICKET ticket)
	2083	{
	2084	register int fd;
	2085
	2086	SL_ENTER(_("sl_sync"));
	2087
	2088	if (SL_ISERROR(fd = get_the_fd(ticket)))
	2089	SL_IRETURN(fd, _("sl_sync"));
	2090
	2091	if (fsync (fd) == -1)
	2092	SL_IRETURN(SL_ESYNC, _("sl_sync"));
	2093
	2094	SL_IRETURN(SL_ENONE, _("sl_sync"));
	2095	}
	2096
[8]	2097	int sl_read_timeout_prep (SL_TICKET ticket)
	2098	{
	2099	int fd;
	2100	int sflags;
[1]	2101
[8]	2102	SL_ENTER(_("sl_read_timeout_prep"));
	2103
	2104	if (SL_ISERROR(fd = get_the_fd(ticket)))
	2105	{
	2106	TPT(( 0, FIL__, __LINE__, _("msg=<ticket error> errno=<%d>"), fd));
	2107	SL_IRETURN(fd, _("sl_read_timeout_prep"));
	2108	}
	2109
	2110	/* set to non-blocking mode
	2111	*/
	2112	sflags = retry_fcntl(FIL__, __LINE__, fd, F_GETFL, 0);
	2113	retry_fcntl(FIL__, __LINE__, fd, F_SETFL, sflags \| O_NONBLOCK);
	2114
	2115	SL_IRETURN(SL_ENONE, _("sl_read_timeout_prep"));
	2116	}
	2117
	2118
[1]	2119	int sl_read_timeout (SL_TICKET ticket, void * buf_in, size_t count,
	2120	int timeout)
	2121	{
	2122	fd_set readfds;
	2123	struct timeval tv;
[8]	2124	/* int sflags; */
[1]	2125	int retval;
	2126
	2127	int fd;
	2128	int byteread = 0;
	2129	int bytes = 0;
	2130	char * buf;
	2131
	2132	time_t tnow;
	2133	time_t tstart;
	2134	time_t tdiff;
	2135	extern volatile int sig_termfast;
	2136
[8]	2137	if (buf_in == NULL \|\| SL_ISERROR(fd = get_the_fd(ticket)))
[1]	2138	{
[8]	2139	if (buf_in == NULL)
	2140	{
	2141	TPT(( 0, FIL__, __LINE__, _("msg=<null buffer>")));
	2142	return (SL_ENULL);
	2143	}
	2144	if (SL_ISERROR(fd = get_the_fd(ticket)))
	2145	{
	2146	TPT(( 0, FIL__, __LINE__, _("msg=<ticket error> errno=<%d>"), fd));
	2147	return (fd);
	2148	}
[1]	2149	}
	2150
	2151	buf = (char *) buf_in;
	2152
	2153	tstart = time(NULL);
	2154	tdiff = 0;
	2155
	2156	while (count > 0)
	2157	{
	2158	FD_ZERO(&readfds);
	2159	FD_SET(fd, &readfds);
	2160
	2161	tv.tv_sec = timeout - tdiff;
	2162	tv.tv_usec = 0;
	2163
	2164	retval = select (fd+1, &readfds, NULL, NULL, &tv);
	2165
	2166	if (retval > 0)
	2167	{
	2168	byteread = read (fd, buf, count);
[8]	2169
	2170	if (byteread > 0)
[1]	2171	{
	2172	bytes += byteread; count -= byteread;
	2173	buf += byteread;
	2174	if (count == 0)
	2175	break;
	2176	}
	2177	else if (byteread == 0)
	2178	{
	2179	break;
	2180	}
	2181	else
	2182	{
	2183	if (errno == EINTR \|\| errno == EAGAIN)
	2184	{
	2185	retry_msleep(1, 0);
	2186	tnow = time(NULL);
	2187	tdiff = tnow - tstart;
	2188	continue;
	2189	}
	2190	else
	2191	{
	2192	return (SL_EREAD);
	2193	}
	2194	}
	2195	}
	2196	else if ((retval == -1) && (errno == EINTR \|\| errno == EAGAIN))
	2197	{
	2198	retry_msleep(1, 0);
	2199	tnow = time(NULL);
	2200	tdiff = tnow - tstart;
	2201	continue;
	2202	}
	2203	else if (retval == 0)
	2204	{
	2205	return (SL_TIMEOUT);
	2206	}
	2207	else
	2208	{
	2209	return (SL_EREAD);
	2210	}
[8]	2211
	2212	if (sig_termfast == 1)
	2213	{
	2214	return (SL_EREAD);
	2215	}
	2216
[1]	2217	tnow = time(NULL);
	2218	tdiff = tnow - tstart;
[8]	2219
	2220	if (tdiff > timeout)
	2221	{
	2222	return (SL_TIMEOUT);
	2223	}
[1]	2224	}
	2225
	2226	return ((int) bytes);
	2227	}
	2228
	2229
	2230	int sl_read (SL_TICKET ticket, void * buf_in, size_t count)
	2231	{
	2232	int fd;
	2233	int byteread = 0;
	2234	int bytes = 0;
	2235
	2236	char * buf;
	2237
	2238	if (count < 1)
	2239	{
	2240	TPT(( 0, FIL__, __LINE__, _("msg=<range error>")));
	2241	return(SL_ERANGE);
	2242	}
	2243	if (buf_in == NULL)
	2244	{
	2245	TPT(( 0, FIL__, __LINE__, _("msg=<null buffer>")));
	2246	return (SL_ENULL);
	2247	}
	2248
	2249	if (SL_ISERROR(fd = get_the_fd(ticket)))
	2250	{
	2251	TPT(( 0, FIL__, __LINE__, _("msg=<ticket error> errno=<%d>"), fd));
	2252	return (fd);
	2253	}
	2254
	2255	buf = (char *) buf_in;
	2256
	2257	do
	2258	{
	2259	byteread = read (fd, buf, count);
	2260	if (byteread > 0)
	2261	{
	2262	bytes += byteread; count -= byteread;
	2263	buf += byteread;
	2264	}
	2265	} while ( byteread > 0 \|\|
[5]	2266	( byteread == -1 && (errno == EINTR \|\| errno == EAGAIN))
[1]	2267	);
	2268
	2269
	2270	if (byteread == (-1))
	2271	{
	2272	TPT(( 0, FIL__, __LINE__, _("msg=<read error> errno=<%d>\n"), errno));
	2273	return (SL_EREAD);
	2274	}
	2275	return (bytes);
	2276	}
	2277
	2278	int sl_read_fast (SL_TICKET ticket, void * buf_in, size_t count)
	2279	{
	2280	int fd;
	2281	int byteread = 0;
	2282
	2283	char * buf;
	2284
	2285	if (count < 1)
	2286	{
	2287	TPT(( 0, FIL__, __LINE__, _("msg=<range error>")));
	2288	return(SL_ERANGE);
	2289	}
	2290	if (buf_in == NULL)
	2291	{
	2292	TPT(( 0, FIL__, __LINE__, _("msg=<null buffer>")));
	2293	return (SL_ENULL);
	2294	}
	2295
	2296	if (SL_ISERROR(fd = get_the_fd(ticket)))
	2297	{
	2298	TPT(( 0, FIL__, __LINE__, _("msg=<ticket error> errno=<%d>"), fd));
	2299	return (fd);
	2300	}
	2301
	2302	buf = (char *) buf_in;
	2303
	2304	do
	2305	{
	2306	byteread = read (fd, buf, count);
	2307	if (byteread >= 0)
	2308	{
	2309	return (byteread);
	2310	}
[5]	2311	} while ( byteread == -1 && (errno == EINTR \|\| errno == EAGAIN));
[1]	2312
	2313
	2314	if (byteread == (-1))
	2315	{
	2316	TPT(( 0, FIL__, __LINE__, _("msg=<read error> errno=<%d>\n"), errno));
	2317	return (SL_EREAD);
	2318	}
	2319	return (0);
	2320	}
	2321
	2322
	2323	int sl_write (SL_TICKET ticket, void * msg_in, long nbytes)
	2324	{
	2325	long bytewritten;
	2326	long bytecount;
	2327	int fd;
	2328
	2329	char * msg;
	2330
	2331	SL_ENTER(_("sl_write"));
	2332
	2333	if (nbytes < 1)
	2334	SL_IRETURN(SL_ERANGE, _("sl_write"));
	2335	if (msg_in == NULL)
	2336	SL_IRETURN(SL_ENULL, _("sl_write"));
	2337	if (SL_ISERROR(fd = get_the_fd(ticket)))
	2338	SL_IRETURN(fd, _("sl_write"));
	2339
	2340	msg = (char *) msg_in;
	2341
	2342	/* write
	2343	*/
	2344	bytecount = 0;
	2345	bytewritten = 0;
	2346	while (bytecount < nbytes)
	2347	{
	2348	if ((bytewritten = write (fd, msg, nbytes-bytecount)) > 0)
	2349	{
	2350	bytecount += bytewritten;
	2351	msg += bytewritten; /* move buffer pointer forward */
	2352	}
	2353	else if (bytewritten <= 0)
	2354	{
	2355	if ( errno == EINTR \|\| errno == EAGAIN) /* try again */
	2356	continue;
	2357	else
	2358	SL_IRETURN(SL_EWRITE, _("sl_write"));
	2359	}
	2360	}
	2361	SL_IRETURN(SL_ENONE, _("sl_write"));
	2362	}
	2363
	2364	int sl_write_line (SL_TICKET ticket, void * msg, long nbytes)
	2365	{
	2366	int status;
	2367
	2368	SL_ENTER(_("sl_write_line"));
	2369
	2370	status = sl_write(ticket, msg, nbytes);
	2371	if (!SL_ISERROR(status))
	2372	status = sl_write(ticket, "\n", 1);
	2373
	2374	SL_IRETURN(status, _("sl_write_line"));
	2375	}
	2376
[76]	2377	int sl_write_line_fast (SL_TICKET ticket, void * msg, long nbytes)
	2378	{
	2379	int status;
	2380	char * p = (char *) msg;
[1]	2381
[76]	2382	SL_ENTER(_("sl_write_line_fast"));
	2383
	2384	/* Here nbytes is strlen(msg), so p[nbytes] is the terminating '\0'
	2385	* Overwrite the terminator, write out, then write back the terminator.
	2386	*/
	2387	p[nbytes] = '\n';
	2388	status = sl_write(ticket, msg, nbytes+1);
	2389	p[nbytes] = '\0';
	2390
	2391	SL_IRETURN(status, _("sl_write_line_fast"));
	2392	}
	2393
	2394
[1]	2395	/* ----------------------------------------------------------------
	2396	*
	2397	* Trustfile interface
	2398	*
	2399	* ---------------------------------------------------------------- */
	2400
	2401	extern uid_t rootonly[];
	2402	extern int EUIDSLOT;
	2403	extern int ORIG_EUIDSLOT;
	2404
	2405	extern char tf_path[MAXFILENAME]; /* Error path for trust function. */
	2406	extern uid_t tf_euid; /* Space for EUID of process. */
	2407
	2408	char * sl_error_string(int errorcode)
	2409	{
	2410	switch (errorcode)
	2411	{
	2412	case SL_EBOGUS:
	2413	return _("Bogus file. Modified during access.");
	2414	case SL_EWRITE:
	2415	return _("Write error.");
	2416	case SL_EREAD:
	2417	return _("Read error.");
	2418	case SL_ESYNC:
	2419	return _("Error in fsync().");
	2420	case SL_EFORWARD:
	2421	return _("Error in lseek().");
	2422	case SL_EREWIND:
	2423	return _("Error in lseek().");
	2424	case SL_EUNLINK:
	2425	return _("Error in unlink().");
	2426	case SL_EMEM:
	2427	return _("Out of memory.");
	2428	case SL_EINTERNAL:
	2429	return _("Internal error.");
	2430	case SL_ETICKET:
	2431	return _("Bad ticket.");
	2432	case SL_EREPEAT:
	2433	return _("Illegal repeated use of function.");
	2434	case SL_ERANGE:
	2435	return _("Argument out of range.");
	2436	case SL_ENULL:
	2437	return _("Dereferenced NULL pointer.");
	2438
	2439	case SL_EBADUID:
	2440	return _("Owner not trustworthy.");
	2441	case SL_EBADGID:
	2442	return _("Group writeable and member not trustworthy.");
	2443	case SL_EBADOTH:
	2444	return _("World writeable.");
	2445	case SL_EBADFILE:
	2446	return _("File access error.");
	2447	case SL_EBADNAME:
	2448	return _("Invalid filename (prob. too long or null).");
	2449
	2450	case SL_ETRUNC:
	2451	return _("Truncation occured.");
	2452	case SL_ESTAT:
	2453	return _("stat() failed.");
	2454	default:
	2455	return _("Unknown error.");
	2456	}
	2457	}
	2458
	2459
	2460
	2461	char * sl_trust_errfile()
	2462	{
	2463	return &tf_path[0];
	2464	}
	2465
	2466	extern uid_t tf_baduid;
	2467	uid_t sl_trust_baduid()
	2468	{
	2469	return tf_baduid;
	2470	}
	2471
	2472	extern gid_t tf_badgid;
	2473	gid_t sl_trust_badgid()
	2474	{
	2475	return tf_badgid;
	2476	}
	2477
	2478
	2479	static int trust_count = 0;
	2480
	2481	int sl_trust_purge_user ()
	2482	{
	2483	int i;
	2484
	2485	EUIDSLOT = ORIG_EUIDSLOT;
	2486	trust_count = 0;
	2487
	2488	for (i = EUIDSLOT; i < (EUIDSLOT + 15); ++i)
	2489	rootonly[i] = sh_uid_neg;
	2490	return 0;
	2491	}
	2492
	2493	int sl_trust_add_user (uid_t pwid)
	2494	{
	2495	SL_ENTER(_("sl_trust_add_user"));
	2496
	2497	if (trust_count == 15)
	2498	SL_IRETURN(SL_ERANGE, _("sl_trust_add_user"));
	2499
	2500	rootonly[EUIDSLOT] = pwid;
	2501	++EUIDSLOT;
	2502	++trust_count;
	2503
	2504	SL_IRETURN(SL_ENONE, _("sl_trust_add_user"));
	2505	}
	2506
[76]	2507	#include "sh_mem.h"
	2508	extern char * sh_util_strdup (const char * str);
	2509
	2510	struct sl_trustfile_store {
	2511	char * filename;
	2512	uid_t teuid;
	2513	struct sl_trustfile_store * next;
	2514	};
	2515
	2516	static struct sl_trustfile_store * sl_trusted_files = NULL;
	2517
	2518	void sl_add_trusted_file(char * filename, uid_t teuid)
	2519	{
	2520	struct sl_trustfile_store *new = SH_ALLOC(sizeof(struct sl_trustfile_store));
	2521
	2522	new->filename = sh_util_strdup (filename);
	2523	new->teuid = teuid;
	2524	new->next = sl_trusted_files;
	2525
	2526	sl_trusted_files = new;
	2527	return;
	2528	}
	2529
	2530	char * sl_check_trusted_file(char * filename, uid_t teuid)
	2531	{
	2532	struct sl_trustfile_store *new = sl_trusted_files;
	2533
	2534	while (new)
	2535	{
	2536	if ((new->teuid == teuid) && (0 == strcmp(new->filename, filename)))
	2537	return filename;
	2538	new = new->next;
	2539	}
	2540
	2541	return NULL;
	2542	}
	2543
	2544	void sl_clear_trusted_file(struct sl_trustfile_store * file)
	2545	{
	2546	if (file)
	2547	{
	2548	if (file->next != NULL)
	2549	sl_clear_trusted_file(file->next);
	2550	SH_FREE(file->filename);
	2551	SH_FREE(file);
	2552	}
	2553	return;
	2554	}
	2555
[1]	2556	int sl_trustfile_euid(char * filename, uid_t teuid)
	2557	{
[76]	2558	long status;
	2559	static time_t old = 0;
	2560	static time_t now;
	2561
[1]	2562	SL_ENTER(_("sl_trustfile_euid"));
	2563
	2564	tf_path[0] = '\0';
	2565	if (filename == NULL \|\| filename[0] == '\0')
	2566	SL_IRETURN(SL_EBADNAME, _("sl_trustfile_euid"));
	2567
[76]	2568	now = time(NULL);
	2569	if (now < (old + 300))
	2570	{
	2571	if (NULL != sl_check_trusted_file(filename, teuid))
	2572	{
	2573	sl_strlcpy(tf_path, filename, sizeof(tf_path));
	2574	SL_IRETURN(SL_ENONE, _("sl_trustfile_euid"));
	2575	}
	2576	}
	2577	else
	2578	{
	2579	sl_clear_trusted_file(sl_trusted_files);
	2580	sl_trusted_files = NULL;
	2581	old = now;
	2582	}
	2583
[1]	2584	tf_euid = teuid;
	2585	status = sl_trustfile(filename, NULL, NULL);
[76]	2586	if (status == SL_ENONE)
	2587	sl_add_trusted_file(filename, teuid);
[1]	2588	SL_IRETURN(status, _("sl_trustfile_euid"));
	2589	}
	2590
[20]	2591	/* ----------------------------------------------------------------
	2592	*
	2593	* Overflow tests
	2594	*
	2595	* ---------------------------------------------------------------- */
[1]	2596
[34]	2597	#ifndef SIZE_MAX
	2598	#define SIZE_MAX (4294967295U)
	2599	#endif
	2600
[20]	2601	int sl_ok_muli (int a, int b) /* ab /
	2602	{
[34]	2603	if ((b == 0) \|\| (a >= (INT_MIN / b) && a <= (INT_MAX / b)))
[20]	2604	return SL_TRUE; /* no overflow */
	2605	return SL_FALSE;
	2606	}
	2607
[34]	2608	int sl_ok_muls (size_t a, size_t b) /* ab /
	2609	{
	2610	if ((b == 0) \|\| (a <= (SIZE_MAX / b)))
	2611	return SL_TRUE; /* no overflow */
	2612	return SL_FALSE;
	2613	}
	2614
[20]	2615	int sl_ok_divi (int a, int b) /* a/b */
	2616	{
	2617	(void) a;
	2618	if (b != 0)
	2619	return SL_TRUE; /* no overflow */
	2620	return SL_FALSE;
	2621	}
	2622
	2623	int sl_ok_addi (int a, int b) /* a+b */
	2624	{
	2625	if (a >= 0 && b >= 0)
	2626	{
	2627	if (a <= (INT_MAX - b))
	2628	return SL_TRUE; /* no overflow */
	2629	else
	2630	return SL_FALSE;
	2631	}
	2632	else if (a < 0 && b < 0)
	2633	{
	2634	if (a >= (INT_MIN - b))
	2635	return SL_TRUE; /* no overflow */
	2636	else
	2637	return SL_FALSE;
	2638	}
	2639	return SL_TRUE;
	2640	}
	2641
[34]	2642	int sl_ok_adds (size_t a, size_t b) /* a+b */
	2643	{
	2644	if (a <= (SIZE_MAX - b))
	2645	return SL_TRUE; /* no overflow */
	2646	else
	2647	return SL_FALSE;
	2648	}
	2649
[20]	2650	int sl_ok_subi (int a, int b) /* a-b */
	2651	{
	2652	if (a >= 0 && b < 0)
	2653	{
	2654	if (a <= (INT_MAX + b))
	2655	return SL_TRUE; /* no overflow */
	2656	else
	2657	return SL_FALSE;
	2658	}
	2659	else if (a < 0 && b >= 0)
	2660	{
	2661	if (a >= (INT_MIN + b))
	2662	return SL_TRUE; /* no overflow */
	2663	else
	2664	return SL_FALSE;
	2665	}
	2666	return SL_TRUE;
	2667	}

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