source: trunk/src/sh_extern.c@ 212

Last change on this file since 212 was 212, checked in by katerina, 16 years ago

Lock baseline database (ticket #139) and allow list as input for PortCheckInterface (ticket #140).
File size: 34.9 KB
Line 
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 fclose (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 fclose (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#define SH_NEED_PWD_GRP 1
95#include "sh_static.h"
96
97
98#undef FIL__
99#define FIL__ _("sh_extern.c")
100
101extern int get_the_fd (SL_TICKET ticket);
102
103/*
104 * -- generic safe popen
105 */
106
107int sh_ext_popen (sh_tas_t * task)
108{
109 long status = 0;
110 int flags;
111 char * tmp;
112 char * tmp2;
113 int errnum;
114 int pipedes[2];
115 FILE * outf = NULL;
116 char * envp[1];
117 char * argp[2];
118
119 char * errfile;
120 char errbuf[SH_ERRBUF_SIZE];
121
122 static int some_error = 0;
123
124#if defined (__linux__)
125 SL_TICKET fd = -1;
126 char pname[128];
127 int pfd = -1;
128#endif
129
130 SL_ENTER(_("sh_ext_popen"));
131
132 /* Linux, HP-UX and FreeBSD will happily accept envp = argp = NULL
133 * Solaris (and probably some other Unices)
134 * needs a valid *envp[] with envp[0] = NULL;
135 * and similarly for argp
136 * OpenBSD finally needs non-null argp[0] ...
137 */
138 argp[0] = task->command;
139 argp[1] = NULL;
140 envp[0] = NULL;
141
142 /*
143 * -- check whether path is trustworthy
144 */
145 status = sl_trustfile(task->command, NULL, NULL);
146#if 0
147 if ((uid_t) -1 != task->trusted_users[0])
148 {
149 status = sl_trustfile(task->command, task->trusted_users, NULL);
150 }
151#endif
152
153 PDBG_OPEN;
154 PDBG_D( (int) status);
155
156 if ( SL_ENONE != status)
157 {
158 PDBG_S("SL_ENONE != status");
159 if (some_error == 0)
160 {
161 tmp = sh_util_safe_name (task->command);
162 errfile = sl_trust_errfile();
163 if (errfile[0] != '\0')
164 {
165 tmp2 = sh_util_safe_name (sl_trust_errfile());
166 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_TRUST2,
167 sl_error_string((int)status), tmp, tmp2);
168 SH_FREE(tmp2);
169 }
170 else
171 {
172 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_TRUST1,
173 sl_error_string((int)status), tmp);
174 }
175 SH_FREE(tmp);
176 }
177 some_error = 1;
178 SL_RETURN ((-1), _("sh_ext_popen"));
179 }
180
181 PDBG(1);
182
183 /*
184 * -- check whether the checksum is correct; with linux emulate fdexec
185 */
186#if !defined(__linux__) && !defined(SL_DEBUG)
187 if (task->checksum[0] != '\0')
188 {
189 char hashbuf[KEYBUF_SIZE];
190 PDBG_S("checksum test");
191 if (0 != sl_strcmp(task->checksum,
192 sh_tiger_hash (task->command, TIGER_FILE, TIGER_NOLIM,
193 hashbuf, sizeof(hashbuf))
194 )
195 )
196 {
197 PDBG_S("checksum mismatch");
198 if (some_error == 0)
199 {
200 tmp = sh_util_safe_name (task->command);
201 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_HASH, tmp);
202 SH_FREE(tmp);
203 }
204 some_error = 1;
205 SL_RETURN ((-1), _("sh_ext_popen"));
206 }
207 }
208#endif
209
210 some_error = 0;
211
212 PDBG(2);
213
214 /*
215 * -- Create the pipe
216 */
217 if (aud_pipe(FIL__, __LINE__, pipedes) < 0)
218 {
219 PDBG_S("pipe() failure");
220 errnum = errno;
221 sh_error_handle((-1), FIL__, __LINE__, errnum, MSG_E_SUBGEN,
222 sh_error_message(errnum, errbuf, sizeof(errbuf)), _("pipe"));
223 SL_RETURN ((-1), _("sh_ext_popen"));
224 }
225
226 PDBG(3);
227
228 /*
229 * -- Flush streams and fork
230 */
231 fflush (NULL);
232
233 task->pid = aud_fork(FIL__, __LINE__);
234
235 if (task->pid == (pid_t) - 1)
236 {
237 PDBG_S("fork() failure");
238 /*@-usedef@*/
239 (void) close(pipedes[0]);
240 (void) close(pipedes[1]);
241 /*@+usedef@*/
242 errnum = errno;
243 sh_error_handle((-1), FIL__, __LINE__, errnum, MSG_E_SUBGEN,
244 sh_error_message(errnum, errbuf, sizeof(errbuf)), _("fork"));
245 SL_RETURN ((-1), _("sh_ext_popen"));
246 }
247
248 PDBG(4);
249
250 if (task->pid == (pid_t) 0)
251 {
252 /*
253 * -- fork again, if requested
254 */
255 if (S_TRUE == task->fork_twice)
256 {
257 task->pid = aud_fork(FIL__, __LINE__);
258
259 if (task->pid == (pid_t) - 1)
260 {
261 aud__exit (FIL__, __LINE__, EXIT_FAILURE);
262 }
263 }
264
265 if (task->pid == (pid_t) 0)
266 {
267 PDBGC_OPEN;
268 PDBGC(1);
269
270 /*
271 * -- grandchild - make write side of the pipe stdin
272 */
273 if (task->rw == 'w')
274 {
275 if (retry_aud_dup2(FIL__, __LINE__,
276 pipedes[STDIN_FILENO], STDIN_FILENO) < 0)
277 aud__exit(FIL__, __LINE__,EXIT_FAILURE);
278 }
279 else
280 {
281 if (retry_aud_dup2(FIL__, __LINE__,
282 pipedes[STDOUT_FILENO], STDOUT_FILENO) < 0)
283 aud__exit(FIL__, __LINE__,EXIT_FAILURE);
284 }
285 PDBGC(2);
286
287
288 /* close the pipe descriptors
289 */
290 (void) close (pipedes[STDIN_FILENO]);
291 (void) close (pipedes[STDOUT_FILENO]);
292
293 /* don't leak file descriptors
294 */
295#if !defined(PDGBFILE)
296 sh_unix_closeall (3, task->com_fd, SL_TRUE); /* in child process */
297#endif
298
299 /* drop root privileges, if possible && requested
300 */
301 if (task->privileged == 0 && 0 == getuid())
302 {
303 PDBGC_S("privileged");
304
305 /* zero priv info
306 */
307 memset(skey, 0, sizeof(sh_key_t));
308
309 (void) aud_setgid(FIL__, __LINE__,(gid_t) task->run_user_gid);
310 (void) aud_setuid(FIL__, __LINE__,(uid_t) task->run_user_uid);
311 /* make sure we cannot get root again
312 */
313 if (aud_setuid(FIL__, __LINE__,0) >= 0)
314 aud__exit(FIL__, __LINE__,EXIT_FAILURE);
315 }
316
317 PDBGC(3);
318 (void) fflush(NULL);
319
320 if (task->rw == 'w')
321 {
322 PDBGC_S("w");
323 (void) fcntl (STDOUT_FILENO, F_SETFD, FD_CLOEXEC);
324 (void) fcntl (STDERR_FILENO, F_SETFD, FD_CLOEXEC);
325 /*
326 freopen(_("/dev/null"), "r+", stderr);
327 freopen(_("/dev/null"), "r+", stdout);
328 */
329 }
330 else
331 {
332 PDBGC_S("r");
333 (void) retry_aud_dup2 (FIL__, __LINE__,
334 STDOUT_FILENO, STDERR_FILENO);
335 (void) fcntl (STDIN_FILENO, F_SETFD, FD_CLOEXEC);
336 /*
337 freopen(_("/dev/null"), "r+", stdin);
338 */
339 }
340
341 PDBGC(4);
342
343
344#if defined(__linux__)
345 /*
346 * -- emulate an fdexec with checksum testing
347 */
348 if (task->checksum[0] != '\0')
349 {
350 PDBGC_S("fexecve");
351 if (task->com_fd != (-1))
352 {
353 pfd = retry_aud_dup(FIL__, __LINE__, task->com_fd);
354 if (pfd < 0)
355 {
356 PDBGC_S("fexecve: dup2 failed");
357 aud__exit(FIL__, __LINE__, EXIT_FAILURE);
358 }
359 }
360 else
361 {
362 char hashbuf[KEYBUF_SIZE];
363
364 fd =
365 sl_open_read(task->command,
366 task->privileged==0 ? SL_NOPRIV : SL_YESPRIV);
367
368 if (0 != sl_strcmp(task->checksum,
369 sh_tiger_hash (task->command,
370 fd, TIGER_NOLIM, hashbuf, sizeof(hashbuf))))
371 {
372 PDBGC_S("fexecve: checksum mismatch");
373 aud__exit(FIL__, __LINE__, EXIT_FAILURE);
374 }
375 pfd = get_the_fd(fd);
376 }
377
378 PDBGC(5);
379 sl_snprintf(pname, sizeof(pname), _("/proc/self/fd/%d"), pfd);
380 if (access(pname, R_OK|X_OK) == 0) /* flawfinder: ignore */
381 {
382 PDBGC(6);
383 PDBGC_CLOSE;
384 fcntl (pfd, F_SETFD, FD_CLOEXEC);
385 retry_aud_execve (FIL__, __LINE__,
386 pname,
387 (task->argc == 0) ? NULL : task->argv,
388 (task->envc == 0) ? NULL : task->envv
389 );
390
391 errnum = errno;
392 PDBGC_OPEN;
393 PDBGC_S(strerror(errnum));
394 PDBGC_S(task->command);
395 PDBGC_S("fexecve: failed");
396 PDBGC_CLOSE;
397 /* failed
398 */
399 aud__exit(FIL__, __LINE__, EXIT_FAILURE);
400 }
401 PDBGC_S("fexecve: not working");
402 /*
403 * procfs not working, go ahead; checksum is tested already
404 */
405 if (fd != -1)
406 sl_close(fd);
407 else if (pfd != -1)
408 close(fd);
409 }
410#endif
411
412 PDBGC_S(" -- non fexecve --");
413 /*
414 * -- execute path if executable
415 */
416 if (0 == access(task->command, R_OK|X_OK)) /* flawfinder: ignore */
417 {
418 PDBGC(5);
419 PDBGC_CLOSE;
420 (void) retry_aud_execve (FIL__, __LINE__,
421 task->command,
422 (task->argc == 0) ? argp : task->argv,
423 (task->envc == 0) ? envp : task->envv
424 );
425 }
426 errnum = errno;
427 PDBGC_OPEN;
428 PDBGC_S(strerror(errnum));
429 PDBGC_S(task->command);
430 PDBGC_S("execve: failed");
431 PDBGC_CLOSE;
432 /* failed
433 */
434 aud__exit(FIL__, __LINE__, EXIT_FAILURE);
435 }
436 /*
437 * if we have forked twice, this is parent::detached_subprocess
438 */
439 if (S_TRUE == task->fork_twice)
440 {
441 aud__exit (FIL__, __LINE__, 0);
442 }
443 }
444
445
446 /*
447 * -- parent; task->pid is child pid; exit status is status of
448 * grandchild if exited
449 */
450 if (S_TRUE == task->fork_twice)
451 {
452 (void) waitpid (task->pid, NULL, 0);
453 }
454
455 PDBG(5);
456 /* open an output stream on top of the write side of the pipe
457 */
458 if (task->rw == 'w')
459 {
460 PDBG_S("is w");
461 (void) close (pipedes[STDIN_FILENO]);
462 (void) retry_fcntl (FIL__, __LINE__, pipedes[STDOUT_FILENO],
463 F_SETFD, FD_CLOEXEC);
464 outf = fdopen (pipedes[STDOUT_FILENO], "w");
465 }
466 else
467 {
468 PDBG_S("is r");
469 (void) close (pipedes[STDOUT_FILENO]);
470 (void) retry_fcntl (FIL__, __LINE__, pipedes[STDIN_FILENO],
471 F_SETFD, FD_CLOEXEC);
472 outf = fdopen (pipedes[STDIN_FILENO], "r");
473 }
474
475 if (outf == NULL)
476 {
477 errnum = errno;
478 PDBG_S("outf == NULL");
479 tmp = sh_util_safe_name (task->command);
480
481 if (task->privileged == 0 && 0 == getuid())
482 sh_error_handle((-1), FIL__, __LINE__, errnum, MSG_NOEXEC,
483 (UID_CAST) task->run_user_uid, tmp);
484 else
485 sh_error_handle((-1), FIL__, __LINE__, errnum, MSG_NOEXEC,
486 (UID_CAST) getuid(), tmp);
487
488 SH_FREE(tmp);
489
490 (void) aud_kill (FIL__, __LINE__, task->pid, SIGKILL);
491 (void) close (pipedes[STDOUT_FILENO]);
492 (void) close (pipedes[STDIN_FILENO]);
493 (void) waitpid (task->pid, NULL, 0);
494 task->pid = 0;
495
496 SL_RETURN ((-1), _("sh_ext_popen"));
497 }
498
499 if (task->rw == 'w')
500 task->pipeFD = pipedes[STDOUT_FILENO];
501 else
502 task->pipeFD = pipedes[STDIN_FILENO];
503
504 PDBG_D(task->pipeFD);
505
506 task->pipeTI = sl_make_ticket(task->pipeFD, _("pipe"));
507
508 flags = (int) retry_fcntl (FIL__, __LINE__, task->pipeFD, F_GETFL, 0);
509 if (flags != (-1))
510 (void) retry_fcntl (FIL__, __LINE__, task->pipeFD,
511 F_SETFL, flags|O_NONBLOCK);
512 task->pipe = outf;
513
514 PDBG_S("return from popen");
515 PDBG_CLOSE;
516
517 SL_RETURN (0, _("sh_ext_popen"));
518}
519
520/*
521 * -- close the pipe
522 */
523extern int flag_err_debug;
524
525int sh_ext_pclose (sh_tas_t * task)
526{
527 int status = 0;
528 int retry = 0;
529 pid_t retval;
530 char infomsg[256];
531
532 SL_ENTER(_("sh_ext_pclose"));
533
534 PDBG_OPEN;
535 PDBG_S(" -> pclose");
536 (void) fflush(task->pipe);
537 (void) fclose(task->pipe);
538 if (!SL_ISERROR(task->pipeTI))
539 (void) sl_close(task->pipeTI);
540
541 task->pipe = NULL;
542 task->pipeFD = (-1);
543 task->pipeTI = SL_ETICKET;
544
545 if (S_FALSE == task->fork_twice)
546 {
547 infomsg[0] = '\0';
548
549 nochmal:
550 retval = waitpid(task->pid, &(task->exit_status), WNOHANG|WUNTRACED);
551 /*@-bufferoverflowhigh@*/
552 if (task->pid == retval)
553 {
554#ifndef USE_UNO
555 if (WIFEXITED(task->exit_status) != 0)
556 {
557 task->exit_status = WEXITSTATUS(task->exit_status);
558 if ((flag_err_debug == SL_TRUE) || (task->exit_status != 0))
559 sl_snprintf(infomsg, sizeof(infomsg),
560 _("Subprocess exited normally with status %d"),
561 task->exit_status);
562 }
563 else if (WIFSIGNALED(task->exit_status) != 0)
564 {
565 sl_snprintf(infomsg, sizeof(infomsg),
566 _("Subprocess terminated by signal %d"),
567 WTERMSIG(task->exit_status));
568 task->exit_status = EXIT_FAILURE;
569 }
570 else if (WIFSTOPPED(task->exit_status) != 0)
571 {
572 sl_snprintf(infomsg, sizeof(infomsg),
573 _("Subprocess stopped by signal %d, killing"),
574 WSTOPSIG(task->exit_status));
575 task->exit_status = EXIT_FAILURE;
576 (void) aud_kill (FIL__, __LINE__, task->pid, 9);
577 (void) retry_msleep (0, 30);
578 (void) waitpid (task->pid, NULL, WNOHANG|WUNTRACED);
579 }
580 else
581 {
582 sl_snprintf(infomsg, sizeof(infomsg),
583 _("Subprocess exit status unknown"));
584 task->exit_status = EXIT_FAILURE;
585 }
586#else
587 task->exit_status = EXIT_FAILURE;
588#endif
589 }
590 else if (0 == retval)
591 {
592 if (retry < 3)
593 {
594 ++retry;
595 (void) retry_msleep(0, (retry * 30));
596 goto nochmal;
597 }
598 (void) aud_kill (FIL__, __LINE__, task->pid, 9);
599 sl_snprintf(infomsg, sizeof(infomsg),
600 _("Subprocess not yet exited, killing"));
601 task->exit_status = EXIT_FAILURE;
602 (void) waitpid (task->pid, NULL, 0);
603 }
604 else
605 {
606 sl_snprintf(infomsg, sizeof(infomsg),
607 _("Waitpid returned error %d\n"), errno);
608 task->exit_status = EXIT_FAILURE;
609 }
610 /*@+bufferoverflowhigh@*/
611 status = task->exit_status;
612 if (flag_err_debug == SL_TRUE)
613 {
614 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, task->exit_status,
615 MSG_E_SUBGEN, infomsg, _("sh_ext_pclose"));
616 }
617 else if (status != 0)
618 {
619 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, task->exit_status,
620 MSG_E_SUBGEN, infomsg, _("sh_ext_pclose"));
621 }
622 }
623
624 task->pid = 0;
625 task->exit_status = 0;
626 PDBG_S(" <--");
627 PDBG_CLOSE;
628 SL_RETURN (status, _("sh_ext_pclose"));
629}
630
631void sh_ext_tas_init (sh_tas_t * tas)
632{
633 int i;
634
635 tas->command = NULL;
636 tas->argc = 0;
637 tas->envc = 0;
638 tas->checksum[0] = '\0';
639 tas->pipeFD = (-1);
640 tas->pipeTI = SL_ETICKET;
641 tas->pid = (pid_t) -1;
642 tas->privileged = 1;
643 tas->pipe = NULL;
644 tas->rw = 'w';
645 tas->exit_status = 0;
646 tas->fork_twice = S_TRUE;
647
648 for (i = 0; i < 32; ++i)
649 {
650 tas->argv[i] = NULL;
651 tas->envv[i] = NULL;
652#if 0
653 tas->trusted_users[i] = (uid_t) -1;
654#endif
655 }
656
657 tas->run_user_uid = (uid_t) getuid();
658 tas->run_user_gid = (gid_t) getgid();
659
660 tas->com_fd = -1;
661 tas->com_ti = -1;
662 return;
663}
664
665
666int sh_ext_tas_add_envv(sh_tas_t * tas, const char * key, const char * val)
667{
668 size_t sk = 0, sv = 0;
669 int si;
670
671 SL_ENTER(_("sh_ext_tas_add_envv"));
672
673 if (tas == NULL || (key == NULL && val == NULL) ||
674 tas->envc >= 30)
675 {
676 SL_RETURN (-1, _("sh_ext_tas_add_envv"));
677 }
678 if (key != NULL)
679 sk = strlen(key) + 1;
680 if (val != NULL)
681 sv = strlen(val) + 1;
682
683 if (!sl_ok_adds(sk, sv))
684 {
685 SL_RETURN (-1, _("sh_ext_tas_add_envv"));
686 }
687 si = tas->envc;
688 tas->envv[si] = SH_ALLOC(sk + sv);
689
690 if (key != NULL)
691 {
692 (void) sl_strlcpy(tas->envv[si], key, sk+sv);
693 (void) sl_strlcat(tas->envv[si], "=", sk+sv);
694 if (val != NULL)
695 (void) sl_strlcat(tas->envv[si], val, sk+sv);
696 }
697 else
698 (void) sl_strlcpy(tas->envv[si], val, sv);
699
700 ++(tas->envc);
701 SL_RETURN ((tas->envc), _("sh_ext_tas_add_envv"));
702}
703
704int sh_ext_tas_rm_argv(sh_tas_t * tas)
705{
706 int last;
707
708 SL_ENTER(_("sh_ext_tas_rm_argv"));
709 if (tas == NULL || tas->argc == 0)
710 {
711 SL_RETURN (-1, _("sh_ext_tas_rm_argv"));
712 }
713
714 last = (tas->argc - 1);
715 --(tas->argc);
716 SH_FREE(tas->argv[last]);
717 tas->argv[last] = NULL;
718 SL_RETURN ((tas->argc), _("sh_ext_tas_rm_argv"));
719}
720
721int sh_ext_tas_add_argv(sh_tas_t * tas, const char * val)
722{
723 size_t sv = 0;
724 int si;
725
726 SL_ENTER(_("sh_ext_tas_add_argv"));
727
728 if (tas == NULL || val == NULL ||
729 tas->argc >= 30)
730 {
731 SL_RETURN (-1, _("sh_ext_tas_add_argv"));
732 }
733
734 if (val != NULL)
735 sv = strlen(val) + 1;
736
737 si = tas->argc;
738 tas->argv[si] = SH_ALLOC(sv);
739
740 (void) sl_strlcpy(tas->argv[si], val, sv);
741
742 ++(tas->argc);
743 SL_RETURN ((tas->argc), _("sh_ext_tas_add_argv"));
744}
745
746void sh_ext_tas_command(sh_tas_t * tas, const char * command)
747{
748 size_t len = sl_strlen(command);
749 tas->command = SH_ALLOC(len+1);
750 (void) sl_strlcpy(tas->command, command, len+1);
751 return;
752}
753
754void sh_ext_tas_free(sh_tas_t * tas)
755{
756 int i;
757 if (NULL != tas->command) SH_FREE(tas->command);
758
759 for (i = 0; i < 32; ++i)
760 {
761 if (NULL != tas->argv[i]) SH_FREE(tas->argv[i]);
762 if (NULL != tas->envv[i]) SH_FREE(tas->envv[i]);
763 }
764
765 if (tas->com_ti != (-1))
766 {
767 (void) sl_close(tas->com_ti);
768 tas->com_ti = -1;
769 tas->com_fd = -1;
770 }
771
772 return;
773}
774
775/* Execute command, return first line of output
776 * ifconfig | grep -1 lo | tail -n 1 | sed s/.*inet addr:\([0-9.]*\)\(.*\)/\1/
777 */
778char * sh_ext_popen_str (char * command)
779{
780 sh_tas_t task;
781 struct sigaction new_act;
782 struct sigaction old_act;
783 char * out = NULL;
784 int status;
785
786 SL_ENTER(_("sh_ext_popen_str"));
787
788 sh_ext_tas_init(&task);
789
790 (void) sh_ext_tas_add_envv (&task, _("SHELL"),
791 _("/bin/sh"));
792 (void) sh_ext_tas_add_envv (&task, _("PATH"),
793 _("/sbin:/bin:/usr/sbin:/usr/bin:/usr/ucb"));
794 (void) sh_ext_tas_add_envv (&task, _("IFS"), " \n\t");
795 if (sh.timezone != NULL)
796 {
797 (void) sh_ext_tas_add_envv(&task, "TZ", sh.timezone);
798 }
799
800 sh_ext_tas_command(&task, _("/bin/sh"));
801
802 (void) sh_ext_tas_add_argv(&task, _("/bin/sh"));
803 (void) sh_ext_tas_add_argv(&task, _("-c"));
804 (void) sh_ext_tas_add_argv(&task, command);
805
806 task.rw = 'r';
807 task.fork_twice = S_FALSE;
808
809 status = sh_ext_popen(&task);
810
811 if (status != 0)
812 {
813 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, status, MSG_E_SUBGEN,
814 _("Could not open pipe"), _("sh_ext_popen_str"));
815 SL_RETURN ((NULL), _("sh_ext_popen_str"));
816 }
817
818 /* ignore SIGPIPE (instead get EPIPE if connection is closed)
819 */
820 new_act.sa_handler = SIG_IGN;
821 (void) retry_sigaction (FIL__, __LINE__, SIGPIPE, &new_act, &old_act);
822
823 /* read from the open pipe
824 */
825 if (task.pipe != NULL)
826 {
827 int try = 1200; /* 1000 * 0.1 = 120 sec */
828 sh_string * s = sh_string_new(0);
829 do {
830 sh_string_read(s, task.pipe, 0);
831 if (sh_string_len(s) == 0)
832 {
833 --try; retry_msleep(0, 100);
834 }
835 } while (sh_string_len(s) == 0 && try != 0);
836
837 if (sh_string_len(s) == 0)
838 {
839 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, status, MSG_E_SUBGEN,
840 _("No output from command"), _("sh_ext_popen_str"));
841 }
842
843 out = sh_util_strdup(sh_string_str(s));
844 sh_string_destroy(&s);
845 }
846
847 /* restore old signal handler
848 */
849 (void) retry_sigaction (FIL__, __LINE__, SIGPIPE, &old_act, NULL);
850
851 /* close pipe and return exit status
852 */
853 (void) sh_ext_pclose(&task);
854 sh_ext_tas_free (&task);
855 SL_RETURN ((out), _("sh_ext_popen_str"));
856}
857
858
859
860
861/* --------------- EXTERN STUFF ------------------- */
862
863#if defined(WITH_EXTERNAL)
864
865typedef struct _sh_com_t
866{
867 char type[4];
868
869 int for_c;
870 char * for_v[32];
871 int fand_c;
872 char * fand_v[32];
873 int fnot_c;
874 char * fnot_v[32];
875 time_t deadtime;
876 time_t last_run;
877
878 sh_tas_t tas;
879
880 struct _sh_com_t * next;
881
882} sh_com_t;
883
884
885static
886void set3 (char * pos, char c1, char c2, char c3)
887{
888 pos[0] = c1;
889 pos[1] = c2;
890 pos[2] = c3;
891 pos[3] = '\0';
892 return;
893}
894
895
896
897/* initialize the external command structure
898 */
899static
900sh_com_t * command_init(void)
901{
902 int i;
903 uid_t ff_euid;
904 sh_com_t * ext_com = NULL;
905
906 SL_ENTER(_("command_init"));
907
908 ext_com = (sh_com_t *) SH_ALLOC(sizeof(sh_com_t));
909
910 if (!ext_com)
911 {
912 SL_RETURN( NULL, _("command_init"));
913 }
914
915 sh_ext_tas_init (&(ext_com->tas));
916
917 (void) sl_get_euid(&ff_euid);
918#if 0
919 ext_com->tas.trusted_users[0] = (uid_t) 0;
920 ext_com->tas.trusted_users[1] = (uid_t) (ff_euid);
921#endif
922
923 /* ------------------------------------------------- */
924
925 set3(ext_com->type, 'l', 'o', 'g');
926 ext_com->for_c = 0;
927 ext_com->fand_c = 0;
928 ext_com->fnot_c = 0;
929 ext_com->deadtime = 0;
930 ext_com->last_run = 0;
931
932 for (i = 0; i < 32; ++i)
933 {
934 ext_com->for_v[i] = NULL;
935 ext_com->fand_v[i] = NULL;
936 ext_com->fnot_v[i] = NULL;
937 }
938 ext_com->next = NULL;
939
940 SL_RETURN( ext_com, _("command_init"));
941}
942
943/* the list of external commands
944 */
945static sh_com_t * ext_coms = NULL;
946
947/* if -1, allocation of last command has failed,
948 * thus don't fill in options
949 */
950static int ext_failed = -1;
951
952static
953int sh_ext_add_envv(const char * key, const char * val)
954{
955 int retval;
956
957 SL_ENTER(_("sh_ext_add_envv"));
958
959 if (ext_coms == NULL || ext_failed == (-1) ||
960 (key == NULL && val == NULL) ||
961 ext_coms->tas.envc >= 30)
962 {
963 SL_RETURN (-1, _("sh_ext_add_envv"));
964 }
965
966 retval = sh_ext_tas_add_envv(&(ext_coms->tas), key, val);
967
968 if (retval >= 0)
969 retval = 0;
970
971 SL_RETURN (retval, _("sh_ext_add_envv"));
972}
973
974
975
976static
977int sh_ext_init(const char * command)
978{
979 sh_com_t * retval;
980 size_t size;
981
982 SL_ENTER(_("sh_ext_init"));
983
984 if (command == NULL)
985 {
986 SL_RETURN (-1, _("sh_ext_init"));
987 }
988 size = strlen(command);
989 if (command[0] != '/' || size < 2)
990 {
991 SL_RETURN (-1, _("sh_ext_init"));
992 }
993
994 if (NULL == (retval = command_init()))
995 {
996 SL_RETURN (-1, _("sh_ext_init"));
997 }
998
999 sh_ext_tas_command(&(retval->tas), command);
1000
1001 if (sh.timezone != NULL)
1002 {
1003 (void) sh_ext_add_envv( "TZ", sh.timezone);
1004 }
1005
1006 retval->next = ext_coms;
1007 ext_coms = retval;
1008 SL_RETURN (0, _("sh_ext_init"));
1009}
1010
1011static
1012int sh_ext_uid (const char * user, /*@out@*/uid_t * uid, /*@out@*/gid_t * gid)
1013{
1014 struct passwd * tempres;
1015#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1016 struct passwd pwd;
1017 char buffer[SH_PWBUF_SIZE];
1018#endif
1019
1020 SL_ENTER(_("sh_ext_uid"));
1021
1022 *uid = (uid_t)-1; *gid = (gid_t)-1;
1023
1024 if (user == NULL)
1025 {
1026 SL_RETURN (-1, _("sh_ext_uid"));
1027 }
1028
1029#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1030 sh_getpwnam_r(user, &pwd, buffer, sizeof(buffer), &tempres);
1031#else
1032 tempres = sh_getpwnam(user);
1033#endif
1034
1035 if (NULL != tempres)
1036 {
1037 *uid = tempres->pw_uid;
1038 *gid = tempres->pw_gid;
1039 SL_RETURN (0, _("sh_ext_uid"));
1040 }
1041
1042 SL_RETURN (-1, _("sh_ext_uid"));
1043}
1044
1045
1046static
1047int sh_ext_add (const char * argstring, int * ntok, char * stok[])
1048{
1049 int i = 0;
1050 size_t s;
1051 char * p;
1052 char * new;
1053 size_t len;
1054
1055 SL_ENTER(_("sh_ext_add"));
1056
1057 if (NULL == argstring)
1058 {
1059 SL_RETURN((-1), _("sh_ext_add"));
1060 }
1061
1062 len = strlen(argstring) + 1;
1063 new = SH_ALLOC(len);
1064 sl_strlcpy(new, argstring, len);
1065
1066 do
1067 {
1068#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1069 char * saveptr;
1070 if (i == 0)
1071 p = strtok_r (new, ", \t", &saveptr);
1072 else
1073 p = strtok_r (NULL, ", \t", &saveptr);
1074#else
1075 if (i == 0)
1076 p = strtok (new, ", \t");
1077 else
1078 p = strtok (NULL, ", \t");
1079#endif
1080
1081 if (p == NULL)
1082 break;
1083
1084 s = strlen(p) + 1;
1085 if (stok[i] != NULL)
1086 SH_FREE(stok[i]);
1087 stok[i] = SH_ALLOC(s);
1088 (void) sl_strlcpy(stok[i], p, s);
1089
1090 ++i;
1091 if (i == 30)
1092 break;
1093 }
1094 while (p != NULL);
1095
1096 *ntok = i;
1097 SH_FREE(new);
1098
1099 SL_RETURN (0, _("sh_ext_add"));
1100}
1101
1102/*********************************************************
1103 *
1104 * Public functions
1105 *
1106 *
1107 *********************************************************/
1108
1109/*
1110 * -- start a new external command, and add it to the list
1111 */
1112int sh_ext_setcommand(const char * cmd)
1113{
1114 int i;
1115
1116 SL_ENTER(_("sh_ext_setcommand"));
1117 if ( (i = sh_ext_init(cmd)) < 0)
1118 ext_failed = -1;
1119 else
1120 ext_failed = 0;
1121 SL_RETURN( i, _("sh_ext_setcommand"));
1122}
1123
1124
1125/*
1126 * -- clean up the command list
1127 */
1128int sh_ext_cleanup(void)
1129{
1130 int i;
1131 sh_com_t * retval;
1132
1133 SL_ENTER(_("sh_ext_cleanup"));
1134
1135 while (ext_coms != NULL)
1136 {
1137 retval = ext_coms;
1138 ext_coms = retval->next;
1139
1140 sh_ext_tas_free (&(retval->tas));
1141
1142 for (i = 0; i < 32; ++i)
1143 {
1144 if (NULL != retval->for_v[i]) SH_FREE(retval->for_v[i]);
1145 if (NULL != retval->fand_v[i]) SH_FREE(retval->fand_v[i]);
1146 if (NULL != retval->fnot_v[i]) SH_FREE(retval->fnot_v[i]);
1147 }
1148
1149 SH_FREE(retval);
1150
1151 }
1152
1153 SL_RETURN (0, _("sh_ext_cleanup"));
1154}
1155
1156/*
1157 * -- explicitely close a command
1158 */
1159int sh_ext_close_command (const char * str)
1160{
1161 (void) str;
1162 if (ext_coms == NULL || ext_failed == (-1))
1163 return (-1);
1164 ext_failed = (-1);
1165 return 0;
1166}
1167
1168/*
1169 * -- add keywords to the OR filter
1170 */
1171int sh_ext_add_or (const char * str)
1172{
1173 if (ext_coms == NULL || ext_failed == (-1))
1174 return (-1);
1175 return (sh_ext_add (str, &(ext_coms->for_c), ext_coms->for_v));
1176}
1177
1178/*
1179 * -- add keywords to the AND filter
1180 */
1181int sh_ext_add_and (const char * str)
1182{
1183 if (ext_coms == NULL || ext_failed == (-1))
1184 return (-1);
1185 return (sh_ext_add (str, &(ext_coms->fand_c), ext_coms->fand_v));
1186}
1187
1188/*
1189 * -- add keywords to the NOT filter
1190 */
1191int sh_ext_add_not (const char * str)
1192{
1193 if (ext_coms == NULL || ext_failed == (-1))
1194 return (-1);
1195 return (sh_ext_add (str, &(ext_coms->fnot_c), ext_coms->fnot_v));
1196}
1197
1198/*
1199 * -- add keywords to the CL argument list
1200 */
1201int sh_ext_add_argv (const char * str)
1202{
1203 if (ext_coms == NULL || ext_failed == (-1))
1204 return (-1);
1205 return (sh_ext_add (str, &(ext_coms->tas.argc), ext_coms->tas.argv));
1206}
1207
1208/*
1209 * -- add a path to the environment
1210 */
1211int sh_ext_add_default (const char * dummy)
1212{
1213 char * p = NULL;
1214 int i;
1215 char dir[SH_PATHBUF];
1216
1217 SL_ENTER(_("sh_ext_add_default"));
1218 if (dummy[0] == 'n' || dummy[0] == 'N' ||
1219 dummy[0] == 'f' || dummy[0] == 'F' || dummy[0] == '0')
1220 {
1221 SL_RETURN(0, _("sh_ext_add_default"));
1222 }
1223 p = sh_unix_getUIDdir (SH_ERR_ERR, (uid_t) ext_coms->tas.run_user_uid,
1224 dir, sizeof(dir));
1225 if (p)
1226 (void) sh_ext_add_envv (_("HOME"), p);
1227 (void) sh_ext_add_envv (_("SHELL"), _("/bin/sh"));
1228 (void) sh_ext_add_envv (_("PATH"), _("/sbin:/bin:/usr/sbin:/usr/bin"));
1229 (void) sh_ext_add_envv (_("IFS"), " \n\t");
1230 i = (p == NULL ? (-1) : 0);
1231 SL_RETURN(i, _("sh_ext_add_default"));
1232}
1233
1234/*
1235 * -- add an environment variable
1236 */
1237int sh_ext_add_environ (const char * str)
1238{
1239 int i;
1240
1241 SL_ENTER(_("sh_ext_add_environ"));
1242 i = sh_ext_add_envv (NULL, str);
1243 SL_RETURN(i, _("sh_ext_add_environ"));
1244}
1245
1246/*
1247 * -- set deadtime
1248 */
1249int sh_ext_deadtime (const char * str)
1250{
1251 long deadtime = 0;
1252 char * tail = NULL;
1253
1254 SL_ENTER(_("sh_ext_deadtime"));
1255
1256 if (ext_coms == NULL || ext_failed == (-1) || str == NULL)
1257 {
1258 SL_RETURN (-1, _("sh_ext_deadtime"));
1259 }
1260 deadtime = strtol(str, &tail, 10);
1261 if (tail == str || deadtime < 0 || deadtime == LONG_MAX)
1262 {
1263 SL_RETURN (-1, _("sh_ext_deadtime"));
1264 }
1265
1266 ext_coms->deadtime = (time_t) deadtime;
1267 SL_RETURN (0, _("sh_ext_deadtime"));
1268}
1269
1270/*
1271 * -- define type
1272 */
1273int sh_ext_type (const char * str)
1274{
1275 SL_ENTER(_("sh_ext_type"));
1276
1277 if (ext_coms == NULL || ext_failed == (-1) || str == NULL)
1278 {
1279 SL_RETURN((-1), _("sh_ext_type"));
1280 }
1281
1282 if (strlen(str) != 3)
1283 {
1284 SL_RETURN((-1), _("sh_ext_type"));
1285 }
1286
1287 set3(ext_coms->type, str[0], str[1], str[2]);
1288
1289 if (str[0] == 'l' && str[1] == 'o' && str[2] == 'g')
1290 ext_coms->tas.rw = 'w';
1291 else if (str[0] == 's' && str[1] == 'r' && str[2] == 'v')
1292 ext_coms->tas.rw = 'w';
1293 else if (str[0] == 'm' && str[1] == 'o' && str[2] == 'n')
1294 ext_coms->tas.rw = 'r';
1295 else
1296 {
1297 SL_RETURN((-1), _("sh_ext_type"));
1298 }
1299
1300 SL_RETURN(0, _("sh_ext_type"));
1301}
1302
1303
1304
1305/*
1306 * -- define checksum
1307 */
1308int sh_ext_checksum (const char * str)
1309{
1310 SL_ENTER(_("sh_ext_checksum"));
1311 if (ext_coms == NULL || ext_failed == (-1) || str == NULL)
1312 {
1313 SL_RETURN((-1), _("sh_ext_checksum"));
1314 }
1315
1316 if (sl_strlen(str) != KEY_LEN)
1317 {
1318 SL_RETURN((-1), _("sh_ext_checksum"));
1319 }
1320
1321 (void) sl_strlcpy (ext_coms->tas.checksum, str, KEY_LEN+1);
1322
1323 SL_RETURN((0), _("sh_ext_checksum"));
1324}
1325
1326/*
1327 * -- choose privileges
1328 */
1329int sh_ext_priv (const char * c)
1330{
1331
1332 uid_t me_uid;
1333 gid_t me_gid;
1334
1335 SL_ENTER(_("sh_ext_priv"));
1336 if (0 == sh_ext_uid (c, &me_uid, &me_gid))
1337 {
1338 ext_coms->tas.run_user_uid = me_uid;
1339 ext_coms->tas.run_user_gid = me_gid;
1340 if (me_uid != (uid_t) 0)
1341 ext_coms->tas.privileged = 0;
1342 SL_RETURN((0), _("sh_ext_priv"));
1343 }
1344
1345 SL_RETURN (-1, _("sh_ext_priv"));
1346}
1347
1348
1349
1350
1351/*
1352 * -- check filters
1353 */
1354static int sh_ext_filter (char * message, sh_com_t * task)
1355{
1356 int i;
1357 int j = 0;
1358 time_t now_time;
1359
1360 SL_ENTER(_("sh_ext_filter"));
1361
1362 /* Presence of any of these keywords prevents execution.
1363 */
1364 if (task->fnot_c > 0)
1365 {
1366 for (i = 0; i < task->fnot_c; ++i)
1367 {
1368 if (NULL != sl_strstr(message, task->fnot_v[i]))
1369 {
1370 SL_RETURN ((-1), _("sh_ext_filter"));
1371 }
1372 }
1373 }
1374
1375 /* Presence of all of these keywords is required for execution.
1376 */
1377 if (task->fand_c > 0)
1378 {
1379 j = 0;
1380
1381 for (i = 0; i < task->fand_c; ++i)
1382 if (NULL != sl_strstr(message, task->fand_v[i]))
1383 ++j;
1384
1385 if (j != task->fand_c)
1386 {
1387 SL_RETURN ((-1), _("sh_ext_filter"));
1388 }
1389
1390 }
1391
1392 /* Presence of at least one of these keywords is required for execution.
1393 */
1394 if (task->for_c > 0)
1395 {
1396 for (i = 0; i < task->for_c; ++i)
1397 {
1398 if (NULL != sl_strstr(message, task->for_v[i]))
1399 {
1400 goto checkdeadtime;
1401 }
1402 }
1403 SL_RETURN ((-1), _("sh_ext_filter"));
1404 }
1405
1406 checkdeadtime:
1407 if (task->deadtime != (time_t) 0) /* deadtime */
1408 {
1409 now_time = time (NULL);
1410
1411 if (task->last_run == (time_t) 0)
1412 {
1413 task->last_run = now_time;
1414 }
1415 else if ((time_t)(now_time-task->last_run) < task->deadtime)
1416 {
1417 SL_RETURN ((-1), _("sh_ext_filter"));
1418 }
1419 else
1420 {
1421 task->last_run = now_time;
1422 }
1423 }
1424
1425 SL_RETURN ((0), _("sh_ext_filter"));
1426}
1427
1428
1429
1430/*
1431 * -- execute external script/program
1432 */
1433int sh_ext_execute (char t1, char t2, char t3, /*@null@*/char * message,
1434 size_t msg_siz)
1435{
1436 int caperr;
1437 sh_com_t * listval = ext_coms;
1438 int status = 0;
1439 char * tmp;
1440 char errbuf[SH_ERRBUF_SIZE];
1441
1442 static int some_error = 0;
1443
1444 struct sigaction new_act;
1445 struct sigaction old_act;
1446
1447 SL_ENTER(_("sh_ext_execute"));
1448
1449 PDBG_OPEN;
1450
1451 if (listval == NULL || message == NULL)
1452 {
1453 SL_RETURN ((-1), _("sh_ext_execute"));
1454 }
1455
1456 PDBG(-1);
1457
1458 if (msg_siz == 0)
1459 msg_siz = sl_strlen(message);
1460
1461
1462 /* ignore SIGPIPE (instead get EPIPE if connection is closed)
1463 */
1464 new_act.sa_handler = SIG_IGN;
1465 (void) retry_sigaction (FIL__, __LINE__, SIGPIPE, &new_act, &old_act);
1466
1467 while (listval != NULL)
1468 {
1469 PDBG_OPEN;
1470 PDBG(-2);
1471 if (t1 == listval->type[0] &&
1472 t2 == listval->type[1] &&
1473 t3 == listval->type[2] &&
1474 0 == sh_ext_filter (message, listval))
1475 {
1476 PDBG(-3);
1477
1478 if (0 != (caperr = sl_get_cap_sub()))
1479 {
1480 sh_error_handle((-1), FIL__, __LINE__, caperr, MSG_E_SUBGEN,
1481 sh_error_message (caperr, errbuf, sizeof(errbuf)),
1482 _("sl_get_cap_sub"));
1483 }
1484 if (0 == sh_ext_popen (&(listval->tas)))
1485 {
1486 PDBG_OPEN;
1487 PDBG(-4);
1488 if (NULL != listval->tas.pipe && listval->tas.rw == 'w')
1489 {
1490 PDBG(-5);
1491 if (message != NULL)
1492 {
1493 PDBG(-6);
1494 status = (int) write (listval->tas.pipeFD,
1495 message, msg_siz);
1496 if (status >= 0)
1497 status = (int) write (listval->tas.pipeFD, "\n", 1);
1498 }
1499 PDBG_D(status);
1500 if (status >= 0)
1501 status = (int) write (listval->tas.pipeFD, "[", 1);
1502 PDBG_D(status);
1503 if (status >= 0)
1504 status = (int) write (listval->tas.pipeFD, "E", 1);
1505 PDBG_D(status);
1506 if (status >= 0)
1507 status = (int) write (listval->tas.pipeFD, "O", 1);
1508 PDBG_D(status);
1509 if (status >= 0)
1510 status = (int) write (listval->tas.pipeFD, "F", 1);
1511 PDBG_D(status);
1512 if (status >= 0)
1513 status = (int) write (listval->tas.pipeFD, "]", 1);
1514 PDBG_D(status);
1515 if (status >= 0)
1516 status = (int) write (listval->tas.pipeFD, "\n", 1);
1517 PDBG_D(status);
1518 if (status >= 0)
1519 {
1520 some_error = 0;
1521 }
1522 if ((status < 0) && (some_error == 0))
1523 {
1524 some_error = 1;
1525 PDBG_S("some error");
1526 PDBG_D(status);
1527 tmp = sh_util_safe_name (listval->tas.command);
1528
1529 if (tmp)
1530 {
1531 if (listval->tas.privileged == 0 &&
1532 (0 == getuid() || 0 != sl_is_suid()) )
1533 sh_error_handle((-1), FIL__, __LINE__, 0,
1534 MSG_NOEXEC,
1535 (UID_CAST) listval->tas.run_user_uid,
1536 tmp);
1537 else
1538 sh_error_handle((-1), FIL__, __LINE__, 0,
1539 MSG_NOEXEC,
1540 (UID_CAST) getuid(), tmp);
1541
1542 SH_FREE(tmp);
1543 }
1544
1545 }
1546 PDBG(-7);
1547 (void) fflush(listval->tas.pipe);
1548 }
1549 PDBG(-8);
1550 (void) sh_ext_pclose(&(listval->tas));
1551 }
1552 else
1553 {
1554 PDBG_OPEN;
1555 PDBG_S("0 != sh_ext_popen()");
1556 }
1557 if (0 != (caperr = sl_drop_cap_sub()))
1558 {
1559 sh_error_handle((-1), FIL__, __LINE__, caperr, MSG_E_SUBGEN,
1560 sh_error_message (caperr, errbuf, sizeof(errbuf)),
1561 _("sl_drop_cap_sub"));
1562 }
1563
1564 }
1565 listval = listval->next;
1566 }
1567 PDBG_OPEN;
1568 PDBG_S("no more commands");
1569
1570 /* restore old signal handler
1571 */
1572 (void) retry_sigaction (FIL__, __LINE__, SIGPIPE, &old_act, NULL);
1573 PDBG_S("return");
1574 PDBG_CLOSE;
1575
1576 SL_RETURN ((0), _("sh_ext_execute"));
1577}
1578
1579
1580/* #if defined(WITH_EXTERNAL) */
1581#endif
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