1 /**
2 * collectd - src/exec.c
3 * Copyright (C) 2007-2009 Florian octo Forster
4 * Copyright (C) 2007-2009 Sebastian Harl
5 * Copyright (C) 2008 Peter Holik
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; only version 2 of the License is applicable.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 * Authors:
21 * Florian octo Forster <octo at verplant.org>
22 * Sebastian Harl <sh at tokkee.org>
23 * Peter Holik <peter at holik.at>
24 **/
26 #define _BSD_SOURCE /* For setgroups */
28 #include "collectd.h"
29 #include "common.h"
30 #include "plugin.h"
32 #include "utils_cmd_putval.h"
33 #include "utils_cmd_putnotif.h"
35 #include <sys/types.h>
36 #include <pwd.h>
37 #include <grp.h>
38 #include <signal.h>
40 #include <pthread.h>
42 #define PL_NORMAL 0x01
43 #define PL_NOTIF_ACTION 0x02
45 #define PL_RUNNING 0x10
47 /*
48 * Private data types
49 */
50 /*
51 * Access to this structure is serialized using the `pl_lock' lock and the
52 * `PL_RUNNING' flag. The execution of notifications is *not* serialized, so
53 * all functions used to handle notifications MUST NOT write to this structure.
54 * The `pid' and `status' fields are thus unused if the `PL_NOTIF_ACTION' flag
55 * is set.
56 * The `PL_RUNNING' flag is set in `exec_read' and unset in `exec_read_one'.
57 */
58 struct program_list_s;
59 typedef struct program_list_s program_list_t;
60 struct program_list_s
61 {
62 char *user;
63 char *group;
64 char *exec;
65 char **argv;
66 int pid;
67 int status;
68 int flags;
69 program_list_t *next;
70 };
72 typedef struct program_list_and_notification_s
73 {
74 program_list_t *pl;
75 notification_t n;
76 } program_list_and_notification_t;
78 /*
79 * Private variables
80 */
81 static program_list_t *pl_head = NULL;
82 static pthread_mutex_t pl_lock = PTHREAD_MUTEX_INITIALIZER;
84 /*
85 * Functions
86 */
87 static void sigchld_handler (int __attribute__((unused)) signal) /* {{{ */
88 {
89 pid_t pid;
90 int status;
91 while ((pid = waitpid (-1, &status, WNOHANG)) > 0)
92 {
93 program_list_t *pl;
94 for (pl = pl_head; pl != NULL; pl = pl->next)
95 if (pl->pid == pid)
96 break;
97 if (pl != NULL)
98 pl->status = status;
99 } /* while (waitpid) */
100 } /* void sigchld_handler }}} */
102 static int exec_config_exec (oconfig_item_t *ci) /* {{{ */
103 {
104 program_list_t *pl;
105 char buffer[128];
106 int i;
108 if (ci->children_num != 0)
109 {
110 WARNING ("exec plugin: The config option `%s' may not be a block.",
111 ci->key);
112 return (-1);
113 }
114 if (ci->values_num < 2)
115 {
116 WARNING ("exec plugin: The config option `%s' needs at least two "
117 "arguments.", ci->key);
118 return (-1);
119 }
120 if ((ci->values[0].type != OCONFIG_TYPE_STRING)
121 || (ci->values[1].type != OCONFIG_TYPE_STRING))
122 {
123 WARNING ("exec plugin: The first two arguments to the `%s' option must "
124 "be string arguments.", ci->key);
125 return (-1);
126 }
128 pl = (program_list_t *) malloc (sizeof (program_list_t));
129 if (pl == NULL)
130 {
131 ERROR ("exec plugin: malloc failed.");
132 return (-1);
133 }
134 memset (pl, '\0', sizeof (program_list_t));
136 if (strcasecmp ("NotificationExec", ci->key) == 0)
137 pl->flags |= PL_NOTIF_ACTION;
138 else
139 pl->flags |= PL_NORMAL;
141 pl->user = strdup (ci->values[0].value.string);
142 if (pl->user == NULL)
143 {
144 ERROR ("exec plugin: strdup failed.");
145 sfree (pl);
146 return (-1);
147 }
149 pl->group = strchr (pl->user, ':');
150 if (pl->group != NULL)
151 {
152 *pl->group = '\0';
153 pl->group++;
154 }
156 pl->exec = strdup (ci->values[1].value.string);
157 if (pl->exec == NULL)
158 {
159 ERROR ("exec plugin: strdup failed.");
160 sfree (pl->user);
161 sfree (pl);
162 return (-1);
163 }
165 pl->argv = (char **) malloc (ci->values_num * sizeof (char *));
166 if (pl->argv == NULL)
167 {
168 ERROR ("exec plugin: malloc failed.");
169 sfree (pl->exec);
170 sfree (pl->user);
171 sfree (pl);
172 return (-1);
173 }
174 memset (pl->argv, '\0', ci->values_num * sizeof (char *));
176 {
177 char *tmp = strrchr (ci->values[1].value.string, '/');
178 if (tmp == NULL)
179 sstrncpy (buffer, ci->values[1].value.string, sizeof (buffer));
180 else
181 sstrncpy (buffer, tmp + 1, sizeof (buffer));
182 }
183 pl->argv[0] = strdup (buffer);
184 if (pl->argv[0] == NULL)
185 {
186 ERROR ("exec plugin: malloc failed.");
187 sfree (pl->argv);
188 sfree (pl->exec);
189 sfree (pl->user);
190 sfree (pl);
191 return (-1);
192 }
194 for (i = 1; i < (ci->values_num - 1); i++)
195 {
196 if (ci->values[i + 1].type == OCONFIG_TYPE_STRING)
197 {
198 pl->argv[i] = strdup (ci->values[i + 1].value.string);
199 }
200 else
201 {
202 if (ci->values[i + 1].type == OCONFIG_TYPE_NUMBER)
203 {
204 ssnprintf (buffer, sizeof (buffer), "%lf",
205 ci->values[i + 1].value.number);
206 }
207 else
208 {
209 if (ci->values[i + 1].value.boolean)
210 sstrncpy (buffer, "true", sizeof (buffer));
211 else
212 sstrncpy (buffer, "false", sizeof (buffer));
213 }
215 pl->argv[i] = strdup (buffer);
216 }
218 if (pl->argv[i] == NULL)
219 {
220 ERROR ("exec plugin: strdup failed.");
221 break;
222 }
223 } /* for (i) */
225 if (i < (ci->values_num - 1))
226 {
227 while ((--i) >= 0)
228 {
229 sfree (pl->argv[i]);
230 }
231 sfree (pl->argv);
232 sfree (pl->exec);
233 sfree (pl->user);
234 sfree (pl);
235 return (-1);
236 }
238 for (i = 0; pl->argv[i] != NULL; i++)
239 {
240 DEBUG ("exec plugin: argv[%i] = %s", i, pl->argv[i]);
241 }
243 pl->next = pl_head;
244 pl_head = pl;
246 return (0);
247 } /* int exec_config_exec }}} */
249 static int exec_config (oconfig_item_t *ci) /* {{{ */
250 {
251 int i;
253 for (i = 0; i < ci->children_num; i++)
254 {
255 oconfig_item_t *child = ci->children + i;
256 if ((strcasecmp ("Exec", child->key) == 0)
257 || (strcasecmp ("NotificationExec", child->key) == 0))
258 exec_config_exec (child);
259 else
260 {
261 WARNING ("exec plugin: Unknown config option `%s'.", child->key);
262 }
263 } /* for (i) */
265 return (0);
266 } /* int exec_config }}} */
268 static void exec_child (program_list_t *pl) /* {{{ */
269 {
270 int status;
271 int uid;
272 int gid;
273 int egid;
275 struct passwd *sp_ptr;
276 struct passwd sp;
277 char nambuf[2048];
278 char errbuf[1024];
280 sp_ptr = NULL;
281 status = getpwnam_r (pl->user, &sp, nambuf, sizeof (nambuf), &sp_ptr);
282 if (status != 0)
283 {
284 ERROR ("exec plugin: getpwnam_r failed: %s",
285 sstrerror (errno, errbuf, sizeof (errbuf)));
286 exit (-1);
287 }
288 if (sp_ptr == NULL)
289 {
290 ERROR ("exec plugin: No such user: `%s'", pl->user);
291 exit (-1);
292 }
294 uid = sp.pw_uid;
295 gid = sp.pw_gid;
296 if (uid == 0)
297 {
298 ERROR ("exec plugin: Cowardly refusing to exec program as root.");
299 exit (-1);
300 }
302 /* The group configured in the configfile is set as effective group, because
303 * this way the forked process can (re-)gain the user's primary group. */
304 egid = -1;
305 if (NULL != pl->group)
306 {
307 if ('\0' != *pl->group) {
308 struct group *gr_ptr = NULL;
309 struct group gr;
311 status = getgrnam_r (pl->group, &gr, nambuf, sizeof (nambuf), &gr_ptr);
312 if (0 != status)
313 {
314 ERROR ("exec plugin: getgrnam_r failed: %s",
315 sstrerror (errno, errbuf, sizeof (errbuf)));
316 exit (-1);
317 }
318 if (NULL == gr_ptr)
319 {
320 ERROR ("exec plugin: No such group: `%s'", pl->group);
321 exit (-1);
322 }
324 egid = gr.gr_gid;
325 }
326 else
327 {
328 egid = gid;
329 }
330 } /* if (pl->group == NULL) */
332 #if HAVE_SETGROUPS
333 if (getuid () == 0)
334 {
335 gid_t glist[2];
336 size_t glist_len;
338 glist[0] = gid;
339 glist_len = 1;
341 if ((gid != egid) && (egid != -1))
342 {
343 glist[1] = egid;
344 glist_len = 2;
345 }
347 setgroups (glist_len, glist);
348 }
349 #endif /* HAVE_SETGROUPS */
351 status = setgid (gid);
352 if (status != 0)
353 {
354 ERROR ("exec plugin: setgid (%i) failed: %s",
355 gid, sstrerror (errno, errbuf, sizeof (errbuf)));
356 exit (-1);
357 }
359 if (egid != -1)
360 {
361 status = setegid (egid);
362 if (status != 0)
363 {
364 ERROR ("exec plugin: setegid (%i) failed: %s",
365 egid, sstrerror (errno, errbuf, sizeof (errbuf)));
366 exit (-1);
367 }
368 }
370 status = setuid (uid);
371 if (status != 0)
372 {
373 ERROR ("exec plugin: setuid (%i) failed: %s",
374 uid, sstrerror (errno, errbuf, sizeof (errbuf)));
375 exit (-1);
376 }
378 status = execvp (pl->exec, pl->argv);
380 ERROR ("exec plugin: exec failed: %s",
381 sstrerror (errno, errbuf, sizeof (errbuf)));
382 exit (-1);
383 } /* void exec_child }}} */
385 /*
386 * Creates three pipes (one for reading, one for writing and one for errors),
387 * forks a child, sets up the pipes so that fd_in is connected to STDIN of
388 * the child and fd_out is connected to STDOUT and fd_err is connected to STDERR
389 * of the child. Then is calls `exec_child'.
390 */
391 static int fork_child (program_list_t *pl, int *fd_in, int *fd_out, int *fd_err) /* {{{ */
392 {
393 int fd_pipe_in[2];
394 int fd_pipe_out[2];
395 int fd_pipe_err[2];
396 char errbuf[1024];
397 int status;
398 int pid;
400 if (pl->pid != 0)
401 return (-1);
403 status = pipe (fd_pipe_in);
404 if (status != 0)
405 {
406 ERROR ("exec plugin: pipe failed: %s",
407 sstrerror (errno, errbuf, sizeof (errbuf)));
408 return (-1);
409 }
411 status = pipe (fd_pipe_out);
412 if (status != 0)
413 {
414 ERROR ("exec plugin: pipe failed: %s",
415 sstrerror (errno, errbuf, sizeof (errbuf)));
416 return (-1);
417 }
419 status = pipe (fd_pipe_err);
420 if (status != 0)
421 {
422 ERROR ("exec plugin: pipe failed: %s",
423 sstrerror (errno, errbuf, sizeof (errbuf)));
424 return (-1);
425 }
427 pid = fork ();
428 if (pid < 0)
429 {
430 ERROR ("exec plugin: fork failed: %s",
431 sstrerror (errno, errbuf, sizeof (errbuf)));
432 return (-1);
433 }
434 else if (pid == 0)
435 {
436 int fd_num;
437 int fd;
439 /* Close all file descriptors but the pipe end we need. */
440 fd_num = getdtablesize ();
441 for (fd = 0; fd < fd_num; fd++)
442 {
443 if ((fd == fd_pipe_in[0])
444 || (fd == fd_pipe_out[1])
445 || (fd == fd_pipe_err[1]))
446 continue;
447 close (fd);
448 }
450 /* Connect the `in' pipe to STDIN */
451 if (fd_pipe_in[0] != STDIN_FILENO)
452 {
453 dup2 (fd_pipe_in[0], STDIN_FILENO);
454 close (fd_pipe_in[0]);
455 }
457 /* Now connect the `out' pipe to STDOUT */
458 if (fd_pipe_out[1] != STDOUT_FILENO)
459 {
460 dup2 (fd_pipe_out[1], STDOUT_FILENO);
461 close (fd_pipe_out[1]);
462 }
464 /* Now connect the `out' pipe to STDOUT */
465 if (fd_pipe_err[1] != STDERR_FILENO)
466 {
467 dup2 (fd_pipe_err[1], STDERR_FILENO);
468 close (fd_pipe_err[1]);
469 }
471 exec_child (pl);
472 /* does not return */
473 }
475 close (fd_pipe_in[0]);
476 close (fd_pipe_out[1]);
477 close (fd_pipe_err[1]);
479 if (fd_in != NULL)
480 *fd_in = fd_pipe_in[1];
481 else
482 close (fd_pipe_in[1]);
484 if (fd_out != NULL)
485 *fd_out = fd_pipe_out[0];
486 else
487 close (fd_pipe_out[0]);
489 if (fd_err != NULL)
490 *fd_err = fd_pipe_err[0];
491 else
492 close (fd_pipe_err[0]);
494 return (pid);
495 } /* int fork_child }}} */
497 static int parse_line (char *buffer) /* {{{ */
498 {
499 if (strncasecmp ("PUTVAL", buffer, strlen ("PUTVAL")) == 0)
500 return (handle_putval (stdout, buffer));
501 else if (strncasecmp ("PUTNOTIF", buffer, strlen ("PUTNOTIF")) == 0)
502 return (handle_putnotif (stdout, buffer));
503 else
504 {
505 /* For backwards compatibility */
506 char tmp[1220];
507 /* Let's annoy the user a bit.. */
508 INFO ("exec plugin: Prepending `PUTVAL' to this line: %s", buffer);
509 ssnprintf (tmp, sizeof (tmp), "PUTVAL %s", buffer);
510 return (handle_putval (stdout, tmp));
511 }
512 } /* int parse_line }}} */
514 static void *exec_read_one (void *arg) /* {{{ */
515 {
516 program_list_t *pl = (program_list_t *) arg;
517 int fd, fd_err, highest_fd;
518 fd_set fdset, copy;
519 int status;
520 char buffer[1200]; /* if not completely read */
521 char buffer_err[1024];
522 char *pbuffer = buffer;
523 char *pbuffer_err = buffer_err;
525 status = fork_child (pl, NULL, &fd, &fd_err);
526 if (status < 0)
527 pthread_exit ((void *) 1);
528 pl->pid = status;
530 assert (pl->pid != 0);
532 FD_ZERO( &fdset );
533 FD_SET(fd, &fdset);
534 FD_SET(fd_err, &fdset);
536 /* Determine the highest file descriptor */
537 highest_fd = (fd > fd_err) ? fd : fd_err;
539 /* We use a copy of fdset, as select modifies it */
540 copy = fdset;
542 while (select(highest_fd + 1, ©, NULL, NULL, NULL ) > 0)
543 {
544 int len;
546 if (FD_ISSET(fd, ©))
547 {
548 char *pnl;
550 len = read(fd, pbuffer, sizeof(buffer) - 1 - (pbuffer - buffer));
552 if (len < 0)
553 {
554 if (errno == EAGAIN || errno == EINTR) continue;
555 break;
556 }
557 else if (len == 0) break; /* We've reached EOF */
559 pbuffer[len] = '\0';
561 len += pbuffer - buffer;
562 pbuffer = buffer;
564 while ((pnl = strchr(pbuffer, '\n')))
565 {
566 *pnl = '\0';
567 if (*(pnl-1) == '\r' ) *(pnl-1) = '\0';
569 parse_line (pbuffer);
571 pbuffer = ++pnl;
572 }
573 /* not completely read ? */
574 if (pbuffer - buffer < len)
575 {
576 len -= pbuffer - buffer;
577 memmove(buffer, pbuffer, len);
578 pbuffer = buffer + len;
579 }
580 else
581 pbuffer = buffer;
582 }
583 else if (FD_ISSET(fd_err, ©))
584 {
585 char *pnl;
587 len = read(fd_err, pbuffer_err, sizeof(buffer_err) - 1 - (pbuffer_err - buffer_err));
589 if (len < 0)
590 {
591 if (errno == EAGAIN || errno == EINTR) continue;
592 break;
593 }
594 else if (len == 0)
595 {
596 /* We've reached EOF */
597 NOTICE ("exec plugin: Program `%s' has closed STDERR.",
598 pl->exec);
599 close (fd_err);
600 FD_CLR (fd_err, &fdset);
601 highest_fd = fd;
602 fd_err = -1;
603 continue;
604 }
606 pbuffer_err[len] = '\0';
608 len += pbuffer_err - buffer_err;
609 pbuffer_err = buffer_err;
611 while ((pnl = strchr(pbuffer_err, '\n')))
612 {
613 *pnl = '\0';
614 if (*(pnl-1) == '\r' ) *(pnl-1) = '\0';
616 ERROR ("exec plugin: exec_read_one: error = %s", pbuffer_err);
618 pbuffer_err = ++pnl;
619 }
620 /* not completely read ? */
621 if (pbuffer_err - buffer_err < len)
622 {
623 len -= pbuffer_err - buffer_err;
624 memmove(buffer_err, pbuffer_err, len);
625 pbuffer_err = buffer_err + len;
626 }
627 else
628 pbuffer_err = buffer_err;
629 }
630 /* reset copy */
631 copy = fdset;
632 }
634 DEBUG ("exec plugin: exec_read_one: Waiting for `%s' to exit.", pl->exec);
635 if (waitpid (pl->pid, &status, 0) > 0)
636 pl->status = status;
638 DEBUG ("exec plugin: Child %i exited with status %i.",
639 (int) pl->pid, pl->status);
641 pl->pid = 0;
643 pthread_mutex_lock (&pl_lock);
644 pl->flags &= ~PL_RUNNING;
645 pthread_mutex_unlock (&pl_lock);
647 close (fd);
648 if (fd_err >= 0)
649 close (fd_err);
651 pthread_exit ((void *) 0);
652 return (NULL);
653 } /* void *exec_read_one }}} */
655 static void *exec_notification_one (void *arg) /* {{{ */
656 {
657 program_list_t *pl = ((program_list_and_notification_t *) arg)->pl;
658 notification_t *n = &((program_list_and_notification_t *) arg)->n;
659 notification_meta_t *meta;
660 int fd;
661 FILE *fh;
662 int pid;
663 int status;
664 const char *severity;
666 pid = fork_child (pl, &fd, NULL, NULL);
667 if (pid < 0) {
668 sfree (arg);
669 pthread_exit ((void *) 1);
670 }
672 fh = fdopen (fd, "w");
673 if (fh == NULL)
674 {
675 char errbuf[1024];
676 ERROR ("exec plugin: fdopen (%i) failed: %s", fd,
677 sstrerror (errno, errbuf, sizeof (errbuf)));
678 kill (pl->pid, SIGTERM);
679 pl->pid = 0;
680 close (fd);
681 sfree (arg);
682 pthread_exit ((void *) 1);
683 }
685 severity = "FAILURE";
686 if (n->severity == NOTIF_WARNING)
687 severity = "WARNING";
688 else if (n->severity == NOTIF_OKAY)
689 severity = "OKAY";
691 fprintf (fh,
692 "Severity: %s\n"
693 "Time: %u\n",
694 severity, (unsigned int) n->time);
696 /* Print the optional fields */
697 if (strlen (n->host) > 0)
698 fprintf (fh, "Host: %s\n", n->host);
699 if (strlen (n->plugin) > 0)
700 fprintf (fh, "Plugin: %s\n", n->plugin);
701 if (strlen (n->plugin_instance) > 0)
702 fprintf (fh, "PluginInstance: %s\n", n->plugin_instance);
703 if (strlen (n->type) > 0)
704 fprintf (fh, "Type: %s\n", n->type);
705 if (strlen (n->type_instance) > 0)
706 fprintf (fh, "TypeInstance: %s\n", n->type_instance);
708 for (meta = n->meta; meta != NULL; meta = meta->next)
709 {
710 if (meta->type == NM_TYPE_STRING)
711 fprintf (fh, "%s: %s\n", meta->name, meta->nm_value.nm_string);
712 else if (meta->type == NM_TYPE_SIGNED_INT)
713 fprintf (fh, "%s: %"PRIi64"\n", meta->name, meta->nm_value.nm_signed_int);
714 else if (meta->type == NM_TYPE_UNSIGNED_INT)
715 fprintf (fh, "%s: %"PRIu64"\n", meta->name, meta->nm_value.nm_unsigned_int);
716 else if (meta->type == NM_TYPE_DOUBLE)
717 fprintf (fh, "%s: %e\n", meta->name, meta->nm_value.nm_double);
718 else if (meta->type == NM_TYPE_BOOLEAN)
719 fprintf (fh, "%s: %s\n", meta->name,
720 meta->nm_value.nm_boolean ? "true" : "false");
721 }
723 fprintf (fh, "\n%s\n", n->message);
725 fflush (fh);
726 fclose (fh);
728 waitpid (pid, &status, 0);
730 DEBUG ("exec plugin: Child %i exited with status %i.",
731 pid, status);
733 plugin_notification_meta_free (n->meta);
734 n->meta = NULL;
735 sfree (arg);
736 pthread_exit ((void *) 0);
737 return (NULL);
738 } /* void *exec_notification_one }}} */
740 static int exec_init (void) /* {{{ */
741 {
742 struct sigaction sa;
744 memset (&sa, '\0', sizeof (sa));
745 sa.sa_handler = sigchld_handler;
746 sigaction (SIGCHLD, &sa, NULL);
748 return (0);
749 } /* int exec_init }}} */
751 static int exec_read (void) /* {{{ */
752 {
753 program_list_t *pl;
755 for (pl = pl_head; pl != NULL; pl = pl->next)
756 {
757 pthread_t t;
758 pthread_attr_t attr;
760 /* Only execute `normal' style executables here. */
761 if ((pl->flags & PL_NORMAL) == 0)
762 continue;
764 pthread_mutex_lock (&pl_lock);
765 /* Skip if a child is already running. */
766 if ((pl->flags & PL_RUNNING) != 0)
767 {
768 pthread_mutex_unlock (&pl_lock);
769 continue;
770 }
771 pl->flags |= PL_RUNNING;
772 pthread_mutex_unlock (&pl_lock);
774 pthread_attr_init (&attr);
775 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
776 pthread_create (&t, &attr, exec_read_one, (void *) pl);
777 } /* for (pl) */
779 return (0);
780 } /* int exec_read }}} */
782 static int exec_notification (const notification_t *n,
783 user_data_t __attribute__((unused)) *user_data)
784 {
785 program_list_t *pl;
786 program_list_and_notification_t *pln;
788 for (pl = pl_head; pl != NULL; pl = pl->next)
789 {
790 pthread_t t;
791 pthread_attr_t attr;
793 /* Only execute `notification' style executables here. */
794 if ((pl->flags & PL_NOTIF_ACTION) == 0)
795 continue;
797 /* Skip if a child is already running. */
798 if (pl->pid != 0)
799 continue;
801 pln = (program_list_and_notification_t *) malloc (sizeof
802 (program_list_and_notification_t));
803 if (pln == NULL)
804 {
805 ERROR ("exec plugin: malloc failed.");
806 continue;
807 }
809 pln->pl = pl;
810 memcpy (&pln->n, n, sizeof (notification_t));
812 /* Set the `meta' member to NULL, otherwise `plugin_notification_meta_copy'
813 * will run into an endless loop. */
814 pln->n.meta = NULL;
815 plugin_notification_meta_copy (&pln->n, n);
817 pthread_attr_init (&attr);
818 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
819 pthread_create (&t, &attr, exec_notification_one, (void *) pln);
820 } /* for (pl) */
822 return (0);
823 } /* }}} int exec_notification */
825 static int exec_shutdown (void) /* {{{ */
826 {
827 program_list_t *pl;
828 program_list_t *next;
830 pl = pl_head;
831 while (pl != NULL)
832 {
833 next = pl->next;
835 if (pl->pid > 0)
836 {
837 kill (pl->pid, SIGTERM);
838 INFO ("exec plugin: Sent SIGTERM to %hu", (unsigned short int) pl->pid);
839 }
841 sfree (pl->user);
842 sfree (pl);
844 pl = next;
845 } /* while (pl) */
846 pl_head = NULL;
848 return (0);
849 } /* int exec_shutdown }}} */
851 void module_register (void)
852 {
853 plugin_register_complex_config ("exec", exec_config);
854 plugin_register_init ("exec", exec_init);
855 plugin_register_read ("exec", exec_read);
856 plugin_register_notification ("exec", exec_notification,
857 /* user_data = */ NULL);
858 plugin_register_shutdown ("exec", exec_shutdown);
859 } /* void module_register */
861 /*
862 * vim:shiftwidth=2:softtabstop=2:tabstop=8:fdm=marker
863 */