source: trunk/src/sh_extern.c@ 300

Last change on this file since 300 was 294, checked in by katerina, 14 years ago

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1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 2000,2004 Rainer Wichmann */
3/* */
4/* This program is free software; you can redistribute it */
5/* and/or modify */
6/* it under the terms of the GNU General Public License as */
7/* published by */
8/* the Free Software Foundation; either version 2 of the License, or */
9/* (at your option) any later version. */
10/* */
11/* This program is distributed in the hope that it will be useful, */
12/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
14/* GNU General Public License for more details. */
15/* */
16/* You should have received a copy of the GNU General Public License */
17/* along with this program; if not, write to the Free Software */
18/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20
21#include "config_xor.h"
22
23
24#include <stdio.h>
25#include <string.h>
26#ifdef HAVE_MEMORY_H
27#include <memory.h>
28#endif
29
30/* replace #if 0 by #if 1 and set an appropriate path in front of '/pdbg.'
31 * for debugging
32 */
33#if 0
34#define PDGBFILE "/pdbg."
35#endif
36
37
38#if defined(PDGBFILE)
39static FILE * pdbg = NULL;
40static FILE * pdbgc = NULL;
41#define PDBG_OPEN if (pdbg == NULL) pdbg = fopen(PDGBFILE"main", "a")
42#define PDBG_CLOSE sl_fclose (FIL__, __LINE__, pdbg); pdbg = NULL
43#define PDBG(arg) fprintf(pdbg, "PDBG: step %d\n", arg); fflush(pdbg)
44#define PDBG_D(arg) fprintf(pdbg, "PDBG: %d\n", arg); fflush(pdbg)
45#define PDBG_S(arg) fprintf(pdbg, "PDBG: %s\n", arg); fflush(pdbg)
46
47#define PDBGC_OPEN if (pdbgc == NULL) pdbgc = fopen(PDGBFILE"child", "a")
48#define PDBGC_CLOSE sl_fclose (FIL__, __LINE__, pdbgc); pdbgc = NULL
49#define PDBGC(arg) fprintf(pdbgc, "PDBGC: step %d\n", arg); fflush(pdbgc)
50#define PDBGC_D(arg) fprintf(pdbgc, "PDBGC: %d\n", arg); fflush(pdbgc)
51#define PDBGC_S(arg) fprintf(pdbgc, "PDBGC: %s\n", arg); fflush(pdbgc)
52#else
53#define PDBG_OPEN
54#define PDBG_CLOSE
55#define PDBG(arg)
56#define PDBG_D(arg)
57#define PDBG_S(arg)
58#define PDBGC_OPEN
59#define PDBGC_CLOSE
60#define PDBGC(arg)
61#define PDBGC_D(arg)
62#define PDBGC_S(arg)
63#endif
64
65
66#include <stdlib.h>
67#include <pwd.h>
68#include <unistd.h>
69#include <fcntl.h>
70#include <signal.h>
71#include <sys/stat.h>
72#include <sys/types.h>
73#include <errno.h>
74#include <sys/wait.h>
75
76#if TIME_WITH_SYS_TIME
77#include <sys/time.h>
78#include <time.h>
79#else
80#if HAVE_SYS_TIME_H
81#include <sys/time.h>
82#else
83#include <time.h>
84#endif
85#endif
86
87
88#include "samhain.h"
89#include "sh_utils.h"
90#include "sh_unix.h"
91#include "sh_tiger.h"
92#include "sh_extern.h"
93#include "sh_calls.h"
94#include "sh_filter.h"
95#define SH_NEED_PWD_GRP 1
96#include "sh_static.h"
97
98
99#undef FIL__
100#define FIL__ _("sh_extern.c")
101
102extern int get_the_fd (SL_TICKET ticket);
103
104/*
105 * -- generic safe popen
106 */
107
108int sh_ext_popen (sh_tas_t * task)
109{
110 long status = 0;
111 int flags;
112 char * tmp;
113 char * tmp2;
114 int errnum;
115 int pipedes[2];
116 FILE * outf = NULL;
117 char * envp[1];
118 char * argp[2];
119
120 char * errfile;
121 char errbuf[SH_ERRBUF_SIZE];
122
123 static int some_error = 0;
124
125#if defined (__linux__)
126 SL_TICKET fd = -1;
127 char pname[128];
128 int pfd = -1;
129#endif
130
131 SL_ENTER(_("sh_ext_popen"));
132
133 /* Linux, HP-UX and FreeBSD will happily accept envp = argp = NULL
134 * (newer Linuxes (gcc 4.4.4) warn on argp == NULL, but accept it,
135 * as reported by T. Luettgert)
136 * Solaris (and probably some other Unices)
137 * needs a valid *envp[] with envp[0] = NULL;
138 * and similarly for argp
139 * OpenBSD finally needs non-null argp[0] ...
140 */
141 argp[0] = task->command;
142 argp[1] = NULL;
143 envp[0] = NULL;
144
145 /*
146 * -- check whether path is trustworthy
147 */
148 status = sl_trustfile(task->command, NULL, NULL);
149#if 0
150 if ((uid_t) -1 != task->trusted_users[0])
151 {
152 status = sl_trustfile(task->command, task->trusted_users, NULL);
153 }
154#endif
155
156 PDBG_OPEN;
157 PDBG_D( (int) status);
158
159 if ( SL_ENONE != status)
160 {
161 PDBG_S("SL_ENONE != status");
162 if (some_error == 0)
163 {
164 tmp = sh_util_safe_name (task->command);
165 errfile = sl_trust_errfile();
166 if (errfile[0] != '\0')
167 {
168 tmp2 = sh_util_safe_name (sl_trust_errfile());
169 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_TRUST2,
170 sl_error_string((int)status), tmp, tmp2);
171 SH_FREE(tmp2);
172 }
173 else
174 {
175 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_TRUST1,
176 sl_error_string((int)status), tmp);
177 }
178 SH_FREE(tmp);
179 }
180 some_error = 1;
181 SL_RETURN ((-1), _("sh_ext_popen"));
182 }
183
184 PDBG(1);
185
186 /*
187 * -- check whether the checksum is correct; with linux emulate fdexec
188 */
189#if ( !defined(__linux__) || ( defined(__linux__) && defined(HAVE_PTHREAD)) ) && !defined(SL_DEBUG)
190 if (task->checksum[0] != '\0')
191 {
192 char hashbuf[KEYBUF_SIZE];
193 PDBG_S("checksum test");
194 if (0 != sl_strcmp(task->checksum,
195 sh_tiger_hash (task->command, TIGER_FILE, TIGER_NOLIM,
196 hashbuf, sizeof(hashbuf))
197 )
198 )
199 {
200 PDBG_S("checksum mismatch");
201 if (some_error == 0)
202 {
203 tmp = sh_util_safe_name (task->command);
204 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_HASH, tmp);
205 SH_FREE(tmp);
206 }
207 some_error = 1;
208 SL_RETURN ((-1), _("sh_ext_popen"));
209 }
210 }
211#endif
212
213 some_error = 0;
214
215 PDBG(2);
216
217 /*
218 * -- Create the pipe
219 */
220 if (aud_pipe(FIL__, __LINE__, pipedes) < 0)
221 {
222 PDBG_S("pipe() failure");
223 errnum = errno;
224 sh_error_handle((-1), FIL__, __LINE__, errnum, MSG_E_SUBGEN,
225 sh_error_message(errnum, errbuf, sizeof(errbuf)), _("pipe"));
226 SL_RETURN ((-1), _("sh_ext_popen"));
227 }
228
229 PDBG(3);
230
231 /*
232 * -- Flush streams and fork
233 */
234 fflush (NULL);
235
236 task->pid = aud_fork(FIL__, __LINE__);
237
238 if (task->pid == (pid_t) - 1)
239 {
240 PDBG_S("fork() failure");
241 /*@-usedef@*/
242 (void) sl_close_fd(FIL__, __LINE__, pipedes[0]);
243 (void) sl_close_fd(FIL__, __LINE__, pipedes[1]);
244 /*@+usedef@*/
245 errnum = errno;
246 sh_error_handle((-1), FIL__, __LINE__, errnum, MSG_E_SUBGEN,
247 sh_error_message(errnum, errbuf, sizeof(errbuf)), _("fork"));
248 SL_RETURN ((-1), _("sh_ext_popen"));
249 }
250
251 PDBG(4);
252
253 if (task->pid == (pid_t) 0)
254 {
255 /*
256 * -- fork again, if requested
257 */
258 if (S_TRUE == task->fork_twice)
259 {
260 task->pid = fork();
261
262 if (task->pid == (pid_t) - 1)
263 {
264 _exit (EXIT_FAILURE);
265 }
266 }
267
268 if (task->pid == (pid_t) 0)
269 {
270 int val_return;
271
272 PDBGC_OPEN;
273 PDBGC(1);
274
275 /*
276 * -- grandchild - make write side of the pipe stdin
277 */
278 if (task->rw == 'w')
279 {
280 do {
281 val_return = dup2 (pipedes[STDIN_FILENO], STDIN_FILENO);
282 } while (val_return < 0 && errno == EINTR);
283
284 if (val_return < 0)
285 _exit(EXIT_FAILURE);
286 }
287 else
288 {
289 do {
290 val_return = dup2 (pipedes[STDOUT_FILENO], STDOUT_FILENO);
291 } while (val_return < 0 && errno == EINTR);
292
293 if (val_return < 0)
294 _exit(EXIT_FAILURE);
295 }
296 PDBGC(2);
297
298
299 /* close the pipe descriptors
300 */
301 (void) sl_close_fd (FIL__, __LINE__, pipedes[STDIN_FILENO]);
302 (void) sl_close_fd (FIL__, __LINE__, pipedes[STDOUT_FILENO]);
303
304 /* don't leak file descriptors
305 */
306#if !defined(PDGBFILE)
307 sh_unix_closeall (3, task->com_fd, SL_TRUE); /* in child process */
308#endif
309
310 /* drop root privileges, if possible && requested
311 */
312 if (task->privileged == 0 && 0 == getuid())
313 {
314 PDBGC_S("privileged");
315
316 /* zero priv info
317 */
318 memset(skey, 0, sizeof(sh_key_t));
319
320 (void) setgid((gid_t) task->run_user_gid);
321 (void) setuid((uid_t) task->run_user_uid);
322 /* make sure we cannot get root again
323 */
324 if (setuid(0) >= 0)
325 _exit(EXIT_FAILURE);
326 }
327
328 PDBGC(3);
329 (void) fflush(NULL);
330
331 if (task->rw == 'w')
332 {
333 PDBGC_S("w");
334 (void) fcntl (STDOUT_FILENO, F_SETFD, FD_CLOEXEC);
335 (void) fcntl (STDERR_FILENO, F_SETFD, FD_CLOEXEC);
336 /*
337 freopen(_("/dev/null"), "r+", stderr);
338 freopen(_("/dev/null"), "r+", stdout);
339 */
340 }
341 else
342 {
343 PDBGC_S("r");
344 do {
345 val_return = dup2 (STDOUT_FILENO, STDERR_FILENO);
346 } while (val_return < 0 && errno == EINTR);
347
348 (void) fcntl (STDIN_FILENO, F_SETFD, FD_CLOEXEC);
349 /*
350 freopen(_("/dev/null"), "r+", stdin);
351 */
352 }
353
354 PDBGC(4);
355
356
357#if defined(__linux__)
358 /*
359 * -- emulate an fdexec with checksum testing
360 */
361
362#if !defined(HAVE_PTHREAD)
363 if (task->checksum[0] != '\0')
364#endif
365 {
366 PDBGC_S("fexecve");
367 if (task->com_fd != (-1))
368 {
369 do {
370 val_return = dup (task->com_fd);
371 } while (val_return < 0 && errno == EINTR);
372 pfd = val_return;
373 if (pfd < 0)
374 {
375 PDBGC_S("fexecve: dup failed");
376 _exit(EXIT_FAILURE);
377 }
378 }
379#if !defined(HAVE_PTHREAD)
380 else
381 {
382 char hashbuf[KEYBUF_SIZE];
383
384 fd =
385 sl_open_read(FIL__, __LINE__, task->command,
386 task->privileged==0 ? SL_NOPRIV : SL_YESPRIV);
387
388 if (0 != sl_strcmp(task->checksum,
389 sh_tiger_hash (task->command,
390 fd, TIGER_NOLIM, hashbuf, sizeof(hashbuf))))
391 {
392 PDBGC_S("fexecve: checksum mismatch");
393 sl_close(fd);
394 _exit(EXIT_FAILURE);
395 }
396
397 pfd = get_the_fd(fd);
398
399 do {
400 val_return = dup (pfd);
401 } while (val_return < 0 && errno == EINTR);
402 pfd = val_return;
403
404 sl_close(fd);
405 fd = -1;
406
407 if (pfd < 0)
408 {
409 PDBGC_S("fexecve: dup (2) failed");
410 _exit(EXIT_FAILURE);
411 }
412 }
413#endif
414
415 PDBGC(5);
416 sl_snprintf(pname, sizeof(pname), _("/proc/self/fd/%d"), pfd);
417 if (access(pname, R_OK|X_OK) == 0) /* flawfinder: ignore */
418 {
419 PDBGC(6);
420 PDBGC_CLOSE;
421 fcntl (pfd, F_SETFD, FD_CLOEXEC);
422 do {
423 val_return = execve (pname,
424 (task->argc == 0) ? argp : task->argv,
425 (task->envc == 0) ? NULL : task->envv
426 );
427 } while (val_return < 0 && errno == EINTR);
428
429 errnum = errno;
430 PDBGC_OPEN;
431 PDBGC_S(strerror(errnum));
432 PDBGC_S(task->command);
433 PDBGC_S("fexecve: failed");
434 PDBGC_CLOSE;
435 /* failed
436 */
437 _exit(EXIT_FAILURE);
438 }
439 PDBGC_S("fexecve: not working");
440 /*
441 * procfs not working, go ahead; checksum is tested already
442 */
443 if (fd != -1)
444 sl_close(fd);
445 else if (pfd != -1)
446 sl_close_fd(FIL__, __LINE__, pfd);
447 }
448#endif
449
450 PDBGC_S(" -- non fexecve --");
451 /*
452 * -- execute path if executable
453 */
454 if (0 == access(task->command, R_OK|X_OK)) /* flawfinder: ignore */
455 {
456 PDBGC(5);
457 PDBGC_CLOSE;
458 do {
459 val_return = execve (task->command,
460 (task->argc == 0) ? argp : task->argv,
461 (task->envc == 0) ? envp : task->envv
462 );
463 } while (val_return < 0 && errno == EINTR);
464 }
465 errnum = errno;
466 PDBGC_OPEN;
467 PDBGC_S(strerror(errnum));
468 PDBGC_S(task->command);
469 PDBGC_S("execve: failed");
470 PDBGC_CLOSE;
471 /* failed
472 */
473 _exit(EXIT_FAILURE);
474 }
475 /*
476 * if we have forked twice, this is parent::detached_subprocess
477 */
478 if (S_TRUE == task->fork_twice)
479 {
480 _exit (0);
481 }
482 }
483
484
485 /*
486 * -- parent; task->pid is child pid; exit status is status of
487 * grandchild if exited
488 */
489 if (S_TRUE == task->fork_twice)
490 {
491 (void) waitpid (task->pid, NULL, 0);
492 }
493
494 PDBG(5);
495 /* open an output stream on top of the write side of the pipe
496 */
497 if (task->rw == 'w')
498 {
499 PDBG_S("is w");
500 (void) sl_close_fd (FIL__, __LINE__, pipedes[STDIN_FILENO]);
501 (void) retry_fcntl (FIL__, __LINE__, pipedes[STDOUT_FILENO],
502 F_SETFD, FD_CLOEXEC);
503 outf = fdopen (pipedes[STDOUT_FILENO], "w");
504 }
505 else
506 {
507 PDBG_S("is r");
508 (void) sl_close_fd (FIL__, __LINE__, pipedes[STDOUT_FILENO]);
509 (void) retry_fcntl (FIL__, __LINE__, pipedes[STDIN_FILENO],
510 F_SETFD, FD_CLOEXEC);
511 outf = fdopen (pipedes[STDIN_FILENO], "r");
512 }
513
514 if (outf == NULL)
515 {
516 errnum = errno;
517 PDBG_S("outf == NULL");
518 tmp = sh_util_safe_name (task->command);
519
520 if (task->privileged == 0 && 0 == getuid())
521 sh_error_handle((-1), FIL__, __LINE__, errnum, MSG_NOEXEC,
522 (UID_CAST) task->run_user_uid, tmp);
523 else
524 sh_error_handle((-1), FIL__, __LINE__, errnum, MSG_NOEXEC,
525 (UID_CAST) getuid(), tmp);
526
527 SH_FREE(tmp);
528
529 (void) aud_kill (FIL__, __LINE__, task->pid, SIGKILL);
530 (void) sl_close_fd (FIL__, __LINE__, pipedes[STDOUT_FILENO]);
531 (void) sl_close_fd (FIL__, __LINE__, pipedes[STDIN_FILENO]);
532 (void) waitpid (task->pid, NULL, 0);
533 task->pid = 0;
534
535 SL_RETURN ((-1), _("sh_ext_popen"));
536 }
537
538 if (task->rw == 'w')
539 task->pipeFD = pipedes[STDOUT_FILENO];
540 else
541 task->pipeFD = pipedes[STDIN_FILENO];
542
543 PDBG_D(task->pipeFD);
544
545 task->pipeTI = sl_make_ticket(FIL__, __LINE__, task->pipeFD, _("pipe"), outf);
546
547 flags = (int) retry_fcntl (FIL__, __LINE__, task->pipeFD, F_GETFL, 0);
548 if (flags != (-1))
549 (void) retry_fcntl (FIL__, __LINE__, task->pipeFD,
550 F_SETFL, flags|O_NONBLOCK);
551 task->pipe = outf;
552
553 PDBG_S("return from popen");
554 PDBG_CLOSE;
555
556 SL_RETURN (0, _("sh_ext_popen"));
557}
558
559/*
560 * -- close the pipe
561 */
562extern int flag_err_debug;
563
564int sh_ext_pclose (sh_tas_t * task)
565{
566 int status = 0;
567 int retry = 0;
568 pid_t retval;
569 char infomsg[256];
570
571 SL_ENTER(_("sh_ext_pclose"));
572
573 PDBG_OPEN;
574 PDBG_S(" -> pclose");
575 (void) fflush(task->pipe);
576 if (!SL_ISERROR(task->pipeTI))
577 (void) sl_close(task->pipeTI);
578
579 task->pipe = NULL;
580 task->pipeFD = (-1);
581 task->pipeTI = SL_ETICKET;
582
583 if (S_FALSE == task->fork_twice)
584 {
585 infomsg[0] = '\0';
586
587 nochmal:
588 retval = waitpid(task->pid, &(task->exit_status), WNOHANG|WUNTRACED);
589 /*@-bufferoverflowhigh@*/
590 if (task->pid == retval)
591 {
592#ifndef USE_UNO
593 if (WIFEXITED(task->exit_status) != 0)
594 {
595 task->exit_status = WEXITSTATUS(task->exit_status);
596 if ((flag_err_debug == SL_TRUE) || (task->exit_status != 0))
597 sl_snprintf(infomsg, sizeof(infomsg),
598 _("Subprocess exited normally with status %d"),
599 task->exit_status);
600 }
601 else if (WIFSIGNALED(task->exit_status) != 0)
602 {
603 sl_snprintf(infomsg, sizeof(infomsg),
604 _("Subprocess terminated by signal %d"),
605 WTERMSIG(task->exit_status));
606 task->exit_status = EXIT_FAILURE;
607 }
608 else if (WIFSTOPPED(task->exit_status) != 0)
609 {
610 sl_snprintf(infomsg, sizeof(infomsg),
611 _("Subprocess stopped by signal %d, killing"),
612 WSTOPSIG(task->exit_status));
613 task->exit_status = EXIT_FAILURE;
614 (void) aud_kill (FIL__, __LINE__, task->pid, 9);
615 (void) retry_msleep (0, 30);
616 (void) waitpid (task->pid, NULL, WNOHANG|WUNTRACED);
617 }
618 else
619 {
620 sl_snprintf(infomsg, sizeof(infomsg),
621 _("Subprocess exit status unknown"));
622 task->exit_status = EXIT_FAILURE;
623 }
624#else
625 task->exit_status = EXIT_FAILURE;
626#endif
627 }
628 else if (0 == retval)
629 {
630 if (retry < 3)
631 {
632 ++retry;
633 (void) retry_msleep(0, (retry * 30));
634 goto nochmal;
635 }
636 (void) aud_kill (FIL__, __LINE__, task->pid, 9);
637 sl_snprintf(infomsg, sizeof(infomsg),
638 _("Subprocess not yet exited, killing"));
639 task->exit_status = EXIT_FAILURE;
640 (void) waitpid (task->pid, NULL, 0);
641 }
642 else
643 {
644 sl_snprintf(infomsg, sizeof(infomsg),
645 _("Waitpid returned error %d\n"), errno);
646 task->exit_status = EXIT_FAILURE;
647 }
648 /*@+bufferoverflowhigh@*/
649 status = task->exit_status;
650 if (flag_err_debug == SL_TRUE)
651 {
652 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, task->exit_status,
653 MSG_E_SUBGEN, infomsg, _("sh_ext_pclose"));
654 }
655 else if (status != 0)
656 {
657 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, task->exit_status,
658 MSG_E_SUBGEN, infomsg, _("sh_ext_pclose"));
659 }
660 }
661
662 task->pid = 0;
663 task->exit_status = 0;
664 PDBG_S(" <--");
665 PDBG_CLOSE;
666 SL_RETURN (status, _("sh_ext_pclose"));
667}
668
669void sh_ext_tas_init (sh_tas_t * tas)
670{
671 int i;
672
673 tas->command = NULL;
674 tas->argc = 0;
675 tas->envc = 0;
676 tas->checksum[0] = '\0';
677 tas->pipeFD = (-1);
678 tas->pipeTI = SL_ETICKET;
679 tas->pid = (pid_t) -1;
680 tas->privileged = 1;
681 tas->pipe = NULL;
682 tas->rw = 'w';
683 tas->exit_status = 0;
684 tas->fork_twice = S_TRUE;
685
686 for (i = 0; i < 32; ++i)
687 {
688 tas->argv[i] = NULL;
689 tas->envv[i] = NULL;
690#if 0
691 tas->trusted_users[i] = (uid_t) -1;
692#endif
693 }
694
695 tas->run_user_uid = (uid_t) getuid();
696 tas->run_user_gid = (gid_t) getgid();
697
698 tas->com_fd = -1;
699 tas->com_ti = -1;
700 return;
701}
702
703
704int sh_ext_tas_add_envv(sh_tas_t * tas, const char * key, const char * val)
705{
706 size_t sk = 0, sv = 0;
707 int si;
708
709 SL_ENTER(_("sh_ext_tas_add_envv"));
710
711 if (tas == NULL || (key == NULL && val == NULL) ||
712 tas->envc >= 30)
713 {
714 SL_RETURN (-1, _("sh_ext_tas_add_envv"));
715 }
716 if (key != NULL)
717 sk = strlen(key) + 1;
718 if (val != NULL)
719 sv = strlen(val) + 1;
720
721 if (!sl_ok_adds(sk, sv))
722 {
723 SL_RETURN (-1, _("sh_ext_tas_add_envv"));
724 }
725 si = tas->envc;
726 tas->envv[si] = SH_ALLOC(sk + sv);
727
728 if (key != NULL)
729 {
730 (void) sl_strlcpy(tas->envv[si], key, sk+sv);
731 (void) sl_strlcat(tas->envv[si], "=", sk+sv);
732 if (val != NULL)
733 (void) sl_strlcat(tas->envv[si], val, sk+sv);
734 }
735 else
736 (void) sl_strlcpy(tas->envv[si], val, sv);
737
738 ++(tas->envc);
739 SL_RETURN ((tas->envc), _("sh_ext_tas_add_envv"));
740}
741
742int sh_ext_tas_rm_argv(sh_tas_t * tas)
743{
744 int last;
745
746 SL_ENTER(_("sh_ext_tas_rm_argv"));
747 if (tas == NULL || tas->argc == 0)
748 {
749 SL_RETURN (-1, _("sh_ext_tas_rm_argv"));
750 }
751
752 last = (tas->argc - 1);
753 --(tas->argc);
754 SH_FREE(tas->argv[last]);
755 tas->argv[last] = NULL;
756 SL_RETURN ((tas->argc), _("sh_ext_tas_rm_argv"));
757}
758
759int sh_ext_tas_add_argv(sh_tas_t * tas, const char * val)
760{
761 size_t sv = 0;
762 int si;
763
764 SL_ENTER(_("sh_ext_tas_add_argv"));
765
766 if (tas == NULL || val == NULL ||
767 tas->argc >= 30)
768 {
769 SL_RETURN (-1, _("sh_ext_tas_add_argv"));
770 }
771
772 if (val != NULL)
773 sv = strlen(val) + 1;
774
775 si = tas->argc;
776 tas->argv[si] = SH_ALLOC(sv);
777
778 (void) sl_strlcpy(tas->argv[si], val, sv);
779
780 ++(tas->argc);
781 SL_RETURN ((tas->argc), _("sh_ext_tas_add_argv"));
782}
783
784void sh_ext_tas_command(sh_tas_t * tas, const char * command)
785{
786 size_t len = sl_strlen(command);
787 tas->command = SH_ALLOC(len+1);
788 (void) sl_strlcpy(tas->command, command, len+1);
789 return;
790}
791
792void sh_ext_tas_free(sh_tas_t * tas)
793{
794 int i;
795 if (NULL != tas->command) SH_FREE(tas->command);
796
797 for (i = 0; i < 32; ++i)
798 {
799 if (NULL != tas->argv[i]) SH_FREE(tas->argv[i]);
800 if (NULL != tas->envv[i]) SH_FREE(tas->envv[i]);
801 }
802
803 if (tas->com_ti != (-1))
804 {
805 (void) sl_close(tas->com_ti);
806 tas->com_ti = -1;
807 tas->com_fd = -1;
808 }
809
810 return;
811}
812
813int sh_ext_popen_init (sh_tas_t * task, char * command)
814{
815 int status;
816
817 sh_ext_tas_init(task);
818
819 (void) sh_ext_tas_add_envv (task, _("SHELL"),
820 _("/bin/sh"));
821 (void) sh_ext_tas_add_envv (task, _("PATH"),
822 _("/sbin:/bin:/usr/sbin:/usr/bin:/usr/ucb"));
823 (void) sh_ext_tas_add_envv (task, _("IFS"), " \n\t");
824 if (sh.timezone != NULL)
825 {
826 (void) sh_ext_tas_add_envv(task, "TZ", sh.timezone);
827 }
828
829 sh_ext_tas_command(task, _("/bin/sh"));
830
831 (void) sh_ext_tas_add_argv(task, _("/bin/sh"));
832 (void) sh_ext_tas_add_argv(task, _("-c"));
833 (void) sh_ext_tas_add_argv(task, command);
834
835 task->rw = 'r';
836 task->fork_twice = S_FALSE;
837
838 status = sh_ext_popen(task);
839
840 return status;
841}
842
843/* Execute a system command */
844
845int sh_ext_system (char * command)
846{
847 sh_tas_t task;
848 int status;
849
850 SL_ENTER(_("sh_ext_system"));
851
852 status = sh_ext_popen_init (&task, command);
853
854 if (status != 0)
855 {
856 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, status, MSG_E_SUBGEN,
857 _("Could not execute command"), _("sh_ext_system"));
858 SL_RETURN ((-1), _("sh_ext_system"));
859 }
860
861 /* close pipe and return exit status
862 */
863 (void) sh_ext_pclose(&task);
864 sh_ext_tas_free (&task);
865 SL_RETURN ((status), _("sh_ext_system"));
866}
867
868/* Execute command, return first line of output
869 * ifconfig | grep -1 lo | tail -n 1 | sed s/.*inet addr:\([0-9.]*\)\(.*\)/\1/
870 */
871char * sh_ext_popen_str (char * command)
872{
873 sh_tas_t task;
874 struct sigaction new_act;
875 struct sigaction old_act;
876 char * out = NULL;
877 int status;
878
879 SL_ENTER(_("sh_ext_popen_str"));
880
881 status = sh_ext_popen_init (&task, command);
882
883 if (status != 0)
884 {
885 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, status, MSG_E_SUBGEN,
886 _("Could not open pipe"), _("sh_ext_popen_str"));
887 SL_RETURN ((NULL), _("sh_ext_popen_str"));
888 }
889
890 /* ignore SIGPIPE (instead get EPIPE if connection is closed)
891 */
892 new_act.sa_handler = SIG_IGN;
893 (void) retry_sigaction (FIL__, __LINE__, SIGPIPE, &new_act, &old_act);
894
895 /* read from the open pipe
896 */
897 if (task.pipe != NULL)
898 {
899 int try = 1200; /* 1000 * 0.1 = 120 sec */
900 sh_string * s = sh_string_new(0);
901 do {
902 sh_string_read(s, task.pipe, 0);
903 if (sh_string_len(s) == 0)
904 {
905 --try; retry_msleep(0, 100);
906 }
907 } while (sh_string_len(s) == 0 && try != 0);
908
909 if (sh_string_len(s) == 0)
910 {
911 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, status, MSG_E_SUBGEN,
912 _("No output from command"), _("sh_ext_popen_str"));
913 }
914
915 out = sh_util_strdup(sh_string_str(s));
916 sh_string_destroy(&s);
917 }
918
919 /* restore old signal handler
920 */
921 (void) retry_sigaction (FIL__, __LINE__, SIGPIPE, &old_act, NULL);
922
923 /* close pipe and return exit status
924 */
925 (void) sh_ext_pclose(&task);
926 sh_ext_tas_free (&task);
927 SL_RETURN ((out), _("sh_ext_popen_str"));
928}
929
930
931
932
933/* --------------- EXTERN STUFF ------------------- */
934
935#if defined(WITH_EXTERNAL)
936
937typedef struct _sh_com_t
938{
939 char type[4];
940
941 sh_filter_type * filter;
942
943 time_t deadtime;
944 time_t last_run;
945
946 sh_tas_t tas;
947
948 struct _sh_com_t * next;
949
950} sh_com_t;
951
952
953static
954void set3 (char * pos, char c1, char c2, char c3)
955{
956 pos[0] = c1;
957 pos[1] = c2;
958 pos[2] = c3;
959 pos[3] = '\0';
960 return;
961}
962
963
964
965/* initialize the external command structure
966 */
967static
968sh_com_t * command_init(void)
969{
970 uid_t ff_euid;
971 sh_com_t * ext_com = NULL;
972
973 SL_ENTER(_("command_init"));
974
975 ext_com = (sh_com_t *) SH_ALLOC(sizeof(sh_com_t));
976
977 if (!ext_com)
978 {
979 SL_RETURN( NULL, _("command_init"));
980 }
981
982 sh_ext_tas_init (&(ext_com->tas));
983
984 (void) sl_get_euid(&ff_euid);
985#if 0
986 ext_com->tas.trusted_users[0] = (uid_t) 0;
987 ext_com->tas.trusted_users[1] = (uid_t) (ff_euid);
988#endif
989
990 /* ------------------------------------------------- */
991
992 set3(ext_com->type, 'l', 'o', 'g');
993 ext_com->filter = NULL;
994 ext_com->deadtime = 0;
995 ext_com->last_run = 0;
996
997 ext_com->next = NULL;
998
999 SL_RETURN( ext_com, _("command_init"));
1000}
1001
1002/* the list of external commands
1003 */
1004static sh_com_t * ext_coms = NULL;
1005
1006/* if -1, allocation of last command has failed,
1007 * thus don't fill in options
1008 */
1009static int ext_failed = -1;
1010
1011static
1012int sh_ext_add_envv(const char * key, const char * val)
1013{
1014 int retval;
1015
1016 SL_ENTER(_("sh_ext_add_envv"));
1017
1018 if (ext_coms == NULL || ext_failed == (-1) ||
1019 (key == NULL && val == NULL) ||
1020 ext_coms->tas.envc >= 30)
1021 {
1022 SL_RETURN (-1, _("sh_ext_add_envv"));
1023 }
1024
1025 retval = sh_ext_tas_add_envv(&(ext_coms->tas), key, val);
1026
1027 if (retval >= 0)
1028 retval = 0;
1029
1030 SL_RETURN (retval, _("sh_ext_add_envv"));
1031}
1032
1033
1034
1035static
1036int sh_ext_init(const char * command)
1037{
1038 sh_com_t * retval;
1039 size_t size;
1040
1041 SL_ENTER(_("sh_ext_init"));
1042
1043 if (command == NULL)
1044 {
1045 SL_RETURN (-1, _("sh_ext_init"));
1046 }
1047 size = strlen(command);
1048 if (command[0] != '/' || size < 2)
1049 {
1050 SL_RETURN (-1, _("sh_ext_init"));
1051 }
1052
1053 if (NULL == (retval = command_init()))
1054 {
1055 SL_RETURN (-1, _("sh_ext_init"));
1056 }
1057
1058 sh_ext_tas_command(&(retval->tas), command);
1059
1060 if (sh.timezone != NULL)
1061 {
1062 (void) sh_ext_add_envv( "TZ", sh.timezone);
1063 }
1064
1065 retval->next = ext_coms;
1066 ext_coms = retval;
1067 SL_RETURN (0, _("sh_ext_init"));
1068}
1069
1070static
1071int sh_ext_uid (const char * user, /*@out@*/uid_t * uid, /*@out@*/gid_t * gid)
1072{
1073 struct passwd * tempres;
1074#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1075 struct passwd pwd;
1076 char * buffer = SH_ALLOC(SH_PWBUF_SIZE);
1077#endif
1078
1079 SL_ENTER(_("sh_ext_uid"));
1080
1081 *uid = (uid_t)-1; *gid = (gid_t)-1;
1082
1083 if (user == NULL)
1084 {
1085#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1086 SH_FREE(buffer);
1087#endif
1088 SL_RETURN (-1, _("sh_ext_uid"));
1089 }
1090
1091#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1092 sh_getpwnam_r(user, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
1093#else
1094 tempres = sh_getpwnam(user);
1095#endif
1096
1097 if (NULL != tempres)
1098 {
1099 *uid = tempres->pw_uid;
1100 *gid = tempres->pw_gid;
1101#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1102 SH_FREE(buffer);
1103#endif
1104 SL_RETURN (0, _("sh_ext_uid"));
1105 }
1106
1107#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1108 SH_FREE(buffer);
1109#endif
1110 SL_RETURN (-1, _("sh_ext_uid"));
1111}
1112
1113
1114static
1115int sh_ext_add (const char * argstring, int * ntok, char * stok[])
1116{
1117 int i = 0;
1118 size_t s;
1119 char * p;
1120 char * new;
1121 size_t len;
1122
1123 SL_ENTER(_("sh_ext_add"));
1124
1125 if (NULL == argstring)
1126 {
1127 SL_RETURN((-1), _("sh_ext_add"));
1128 }
1129
1130 len = strlen(argstring) + 1;
1131 new = SH_ALLOC(len);
1132 sl_strlcpy(new, argstring, len);
1133
1134 do
1135 {
1136#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1137 char * saveptr;
1138 if (i == 0)
1139 p = strtok_r (new, ", \t", &saveptr);
1140 else
1141 p = strtok_r (NULL, ", \t", &saveptr);
1142#else
1143 if (i == 0)
1144 p = strtok (new, ", \t");
1145 else
1146 p = strtok (NULL, ", \t");
1147#endif
1148
1149 if (p == NULL)
1150 break;
1151
1152 s = strlen(p) + 1;
1153 if (stok[i] != NULL)
1154 SH_FREE(stok[i]);
1155 stok[i] = SH_ALLOC(s);
1156 (void) sl_strlcpy(stok[i], p, s);
1157
1158 ++i;
1159 if (i == 30)
1160 break;
1161 }
1162 while (p != NULL);
1163
1164 *ntok = i;
1165 SH_FREE(new);
1166
1167 SL_RETURN (0, _("sh_ext_add"));
1168}
1169
1170/*********************************************************
1171 *
1172 * Public functions
1173 *
1174 *
1175 *********************************************************/
1176
1177/*
1178 * -- start a new external command, and add it to the list
1179 */
1180int sh_ext_setcommand(const char * cmd)
1181{
1182 int i;
1183
1184 SL_ENTER(_("sh_ext_setcommand"));
1185 if ( (i = sh_ext_init(cmd)) < 0)
1186 ext_failed = -1;
1187 else
1188 ext_failed = 0;
1189 SL_RETURN( i, _("sh_ext_setcommand"));
1190}
1191
1192
1193/*
1194 * -- clean up the command list
1195 */
1196int sh_ext_cleanup(void)
1197{
1198 sh_com_t * retval;
1199
1200 SL_ENTER(_("sh_ext_cleanup"));
1201
1202 while (ext_coms != NULL)
1203 {
1204 retval = ext_coms;
1205 ext_coms = retval->next;
1206
1207 sh_ext_tas_free (&(retval->tas));
1208
1209 if (retval->filter)
1210 sh_filter_free (retval->filter);
1211
1212 SH_FREE(retval);
1213
1214 }
1215
1216 SL_RETURN (0, _("sh_ext_cleanup"));
1217}
1218
1219/*
1220 * -- explicitely close a command
1221 */
1222int sh_ext_close_command (const char * str)
1223{
1224 (void) str;
1225 if (ext_coms == NULL || ext_failed == (-1))
1226 return (-1);
1227 ext_failed = (-1);
1228 return 0;
1229}
1230
1231/*
1232 * -- add keywords to the OR filter
1233 */
1234int sh_ext_add_or (const char * str)
1235{
1236 if (ext_coms == NULL || ext_failed == (-1))
1237 return (-1);
1238 if (ext_coms->filter == NULL)
1239 ext_coms->filter = sh_filter_alloc();
1240 return (sh_filter_add(str, ext_coms->filter, SH_FILT_OR));
1241}
1242
1243/*
1244 * -- add keywords to the AND filter
1245 */
1246int sh_ext_add_and (const char * str)
1247{
1248 if (ext_coms == NULL || ext_failed == (-1))
1249 return (-1);
1250 if (ext_coms->filter == NULL)
1251 ext_coms->filter = sh_filter_alloc();
1252 return (sh_filter_add(str, ext_coms->filter, SH_FILT_AND));
1253}
1254
1255/*
1256 * -- add keywords to the NOT filter
1257 */
1258int sh_ext_add_not (const char * str)
1259{
1260 if (ext_coms == NULL || ext_failed == (-1))
1261 return (-1);
1262 if (ext_coms->filter == NULL)
1263 ext_coms->filter = sh_filter_alloc();
1264 return (sh_filter_add(str, ext_coms->filter, SH_FILT_NOT));
1265}
1266
1267/*
1268 * -- add keywords to the CL argument list
1269 */
1270int sh_ext_add_argv (const char * str)
1271{
1272 if (ext_coms == NULL || ext_failed == (-1))
1273 return (-1);
1274 return (sh_ext_add (str, &(ext_coms->tas.argc), ext_coms->tas.argv));
1275}
1276
1277/*
1278 * -- add a path to the environment
1279 */
1280int sh_ext_add_default (const char * dummy)
1281{
1282 char * p = NULL;
1283 int i;
1284 char dir[SH_PATHBUF];
1285
1286 SL_ENTER(_("sh_ext_add_default"));
1287 if (dummy[0] == 'n' || dummy[0] == 'N' ||
1288 dummy[0] == 'f' || dummy[0] == 'F' || dummy[0] == '0')
1289 {
1290 SL_RETURN(0, _("sh_ext_add_default"));
1291 }
1292 p = sh_unix_getUIDdir (SH_ERR_ERR, (uid_t) ext_coms->tas.run_user_uid,
1293 dir, sizeof(dir));
1294 if (p)
1295 (void) sh_ext_add_envv (_("HOME"), p);
1296 (void) sh_ext_add_envv (_("SHELL"), _("/bin/sh"));
1297 (void) sh_ext_add_envv (_("PATH"), _("/sbin:/bin:/usr/sbin:/usr/bin"));
1298 (void) sh_ext_add_envv (_("IFS"), " \n\t");
1299 i = (p == NULL ? (-1) : 0);
1300 SL_RETURN(i, _("sh_ext_add_default"));
1301}
1302
1303/*
1304 * -- add an environment variable
1305 */
1306int sh_ext_add_environ (const char * str)
1307{
1308 int i;
1309
1310 SL_ENTER(_("sh_ext_add_environ"));
1311 i = sh_ext_add_envv (NULL, str);
1312 SL_RETURN(i, _("sh_ext_add_environ"));
1313}
1314
1315/*
1316 * -- set deadtime
1317 */
1318int sh_ext_deadtime (const char * str)
1319{
1320 long deadtime = 0;
1321 char * tail = NULL;
1322
1323 SL_ENTER(_("sh_ext_deadtime"));
1324
1325 if (ext_coms == NULL || ext_failed == (-1) || str == NULL)
1326 {
1327 SL_RETURN (-1, _("sh_ext_deadtime"));
1328 }
1329 deadtime = strtol(str, &tail, 10);
1330 if (tail == str || deadtime < 0 || deadtime == LONG_MAX)
1331 {
1332 SL_RETURN (-1, _("sh_ext_deadtime"));
1333 }
1334
1335 ext_coms->deadtime = (time_t) deadtime;
1336 SL_RETURN (0, _("sh_ext_deadtime"));
1337}
1338
1339/*
1340 * -- define type
1341 */
1342int sh_ext_type (const char * str)
1343{
1344 SL_ENTER(_("sh_ext_type"));
1345
1346 if (ext_coms == NULL || ext_failed == (-1) || str == NULL)
1347 {
1348 SL_RETURN((-1), _("sh_ext_type"));
1349 }
1350
1351 if (strlen(str) != 3)
1352 {
1353 SL_RETURN((-1), _("sh_ext_type"));
1354 }
1355
1356 set3(ext_coms->type, str[0], str[1], str[2]);
1357
1358 if (str[0] == 'l' && str[1] == 'o' && str[2] == 'g')
1359 ext_coms->tas.rw = 'w';
1360 else if (str[0] == 's' && str[1] == 'r' && str[2] == 'v')
1361 ext_coms->tas.rw = 'w';
1362 else if (str[0] == 'm' && str[1] == 'o' && str[2] == 'n')
1363 ext_coms->tas.rw = 'r';
1364 else
1365 {
1366 SL_RETURN((-1), _("sh_ext_type"));
1367 }
1368
1369 SL_RETURN(0, _("sh_ext_type"));
1370}
1371
1372
1373
1374/*
1375 * -- define checksum
1376 */
1377int sh_ext_checksum (const char * str)
1378{
1379 SL_ENTER(_("sh_ext_checksum"));
1380 if (ext_coms == NULL || ext_failed == (-1) || str == NULL)
1381 {
1382 SL_RETURN((-1), _("sh_ext_checksum"));
1383 }
1384
1385 if (sl_strlen(str) != KEY_LEN)
1386 {
1387 SL_RETURN((-1), _("sh_ext_checksum"));
1388 }
1389
1390 (void) sl_strlcpy (ext_coms->tas.checksum, str, KEY_LEN+1);
1391
1392 SL_RETURN((0), _("sh_ext_checksum"));
1393}
1394
1395/*
1396 * -- choose privileges
1397 */
1398int sh_ext_priv (const char * c)
1399{
1400
1401 uid_t me_uid;
1402 gid_t me_gid;
1403
1404 SL_ENTER(_("sh_ext_priv"));
1405 if (0 == sh_ext_uid (c, &me_uid, &me_gid))
1406 {
1407 ext_coms->tas.run_user_uid = me_uid;
1408 ext_coms->tas.run_user_gid = me_gid;
1409 if (me_uid != (uid_t) 0)
1410 ext_coms->tas.privileged = 0;
1411 SL_RETURN((0), _("sh_ext_priv"));
1412 }
1413
1414 SL_RETURN (-1, _("sh_ext_priv"));
1415}
1416
1417
1418
1419
1420/*
1421 * -- check filters
1422 */
1423static int sh_ext_filter (char * message, sh_com_t * task)
1424{
1425 time_t now_time;
1426
1427 SL_ENTER(_("sh_ext_filter"));
1428
1429 if (task->filter)
1430 {
1431 if (0 != sh_filter_filter (message, task->filter))
1432 {
1433 SL_RETURN ((-1), _("sh_ext_filter"));
1434 }
1435 }
1436
1437 /* Filter passed, check deadtime */
1438
1439 if (task->deadtime != (time_t) 0)
1440 {
1441 now_time = time (NULL);
1442
1443 if (task->last_run == (time_t) 0)
1444 {
1445 task->last_run = now_time;
1446 }
1447 else if ((time_t)(now_time-task->last_run) < task->deadtime)
1448 {
1449 SL_RETURN ((-1), _("sh_ext_filter"));
1450 }
1451 else
1452 {
1453 task->last_run = now_time;
1454 }
1455 }
1456
1457 SL_RETURN ((0), _("sh_ext_filter"));
1458}
1459
1460
1461
1462/*
1463 * -- execute external script/program
1464 */
1465int sh_ext_execute (char t1, char t2, char t3, /*@null@*/char * message,
1466 size_t msg_siz)
1467{
1468 int caperr;
1469 sh_com_t * listval = ext_coms;
1470 int status = 0;
1471 char * tmp;
1472 char errbuf[SH_ERRBUF_SIZE];
1473
1474 static int some_error = 0;
1475
1476 struct sigaction new_act;
1477 struct sigaction old_act;
1478
1479 SL_ENTER(_("sh_ext_execute"));
1480
1481 PDBG_OPEN;
1482
1483 if (listval == NULL || message == NULL)
1484 {
1485 SL_RETURN ((-1), _("sh_ext_execute"));
1486 }
1487
1488 PDBG(-1);
1489
1490 if (msg_siz == 0)
1491 msg_siz = sl_strlen(message);
1492
1493
1494 /* ignore SIGPIPE (instead get EPIPE if connection is closed)
1495 */
1496 new_act.sa_handler = SIG_IGN;
1497 (void) retry_sigaction (FIL__, __LINE__, SIGPIPE, &new_act, &old_act);
1498
1499 while (listval != NULL)
1500 {
1501 PDBG_OPEN;
1502 PDBG(-2);
1503 if (t1 == listval->type[0] &&
1504 t2 == listval->type[1] &&
1505 t3 == listval->type[2] &&
1506 0 == sh_ext_filter (message, listval))
1507 {
1508 PDBG(-3);
1509
1510 if (0 != (caperr = sl_get_cap_sub()))
1511 {
1512 sh_error_handle((-1), FIL__, __LINE__, caperr, MSG_E_SUBGEN,
1513 sh_error_message (caperr, errbuf, sizeof(errbuf)),
1514 _("sl_get_cap_sub"));
1515 }
1516 if (0 == sh_ext_popen (&(listval->tas)))
1517 {
1518 PDBG_OPEN;
1519 PDBG(-4);
1520 if (NULL != listval->tas.pipe && listval->tas.rw == 'w')
1521 {
1522 PDBG(-5);
1523 if (message != NULL)
1524 {
1525 PDBG(-6);
1526 status = (int) write (listval->tas.pipeFD,
1527 message, msg_siz);
1528 if (status >= 0)
1529 status = (int) write (listval->tas.pipeFD, "\n", 1);
1530 }
1531 PDBG_D(status);
1532 if (status >= 0)
1533 status = (int) write (listval->tas.pipeFD, "[", 1);
1534 PDBG_D(status);
1535 if (status >= 0)
1536 status = (int) write (listval->tas.pipeFD, "E", 1);
1537 PDBG_D(status);
1538 if (status >= 0)
1539 status = (int) write (listval->tas.pipeFD, "O", 1);
1540 PDBG_D(status);
1541 if (status >= 0)
1542 status = (int) write (listval->tas.pipeFD, "F", 1);
1543 PDBG_D(status);
1544 if (status >= 0)
1545 status = (int) write (listval->tas.pipeFD, "]", 1);
1546 PDBG_D(status);
1547 if (status >= 0)
1548 status = (int) write (listval->tas.pipeFD, "\n", 1);
1549 PDBG_D(status);
1550 if (status >= 0)
1551 {
1552 some_error = 0;
1553 }
1554 if ((status < 0) && (some_error == 0))
1555 {
1556 some_error = 1;
1557 PDBG_S("some error");
1558 PDBG_D(status);
1559 tmp = sh_util_safe_name (listval->tas.command);
1560
1561 if (tmp)
1562 {
1563 if (listval->tas.privileged == 0 &&
1564 (0 == getuid() || 0 != sl_is_suid()) )
1565 sh_error_handle((-1), FIL__, __LINE__, 0,
1566 MSG_NOEXEC,
1567 (UID_CAST) listval->tas.run_user_uid,
1568 tmp);
1569 else
1570 sh_error_handle((-1), FIL__, __LINE__, 0,
1571 MSG_NOEXEC,
1572 (UID_CAST) getuid(), tmp);
1573
1574 SH_FREE(tmp);
1575 }
1576
1577 }
1578 PDBG(-7);
1579 (void) fflush(listval->tas.pipe);
1580 }
1581 PDBG(-8);
1582 (void) sh_ext_pclose(&(listval->tas));
1583 }
1584 else
1585 {
1586 PDBG_OPEN;
1587 PDBG_S("0 != sh_ext_popen()");
1588 }
1589 if (0 != (caperr = sl_drop_cap_sub()))
1590 {
1591 sh_error_handle((-1), FIL__, __LINE__, caperr, MSG_E_SUBGEN,
1592 sh_error_message (caperr, errbuf, sizeof(errbuf)),
1593 _("sl_drop_cap_sub"));
1594 }
1595
1596 }
1597 listval = listval->next;
1598 }
1599 PDBG_OPEN;
1600 PDBG_S("no more commands");
1601
1602 /* restore old signal handler
1603 */
1604 (void) retry_sigaction (FIL__, __LINE__, SIGPIPE, &old_act, NULL);
1605 PDBG_S("return");
1606 PDBG_CLOSE;
1607
1608 SL_RETURN ((0), _("sh_ext_execute"));
1609}
1610
1611
1612/* #if defined(WITH_EXTERNAL) */
1613#endif
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