1 /* $NetBSD: pkill.c,v 1.16 2005/10/10 22:13:20 kleink Exp $ */
4 * Copyright (c) 2002 The NetBSD Foundation, Inc.
5 * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
8 * This code is derived from software contributed to The NetBSD Foundation
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the NetBSD
22 * Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
43 #include <sys/types.h>
44 #include <sys/param.h>
45 #include <sys/sysctl.h>
47 #include <sys/queue.h>
69 #define STATUS_MATCH 0
70 #define STATUS_NOMATCH 1
71 #define STATUS_BADUSAGE 2
72 #define STATUS_ERROR 3
77 /* Ignore system-processes (if '-S' flag is not specified) and myself. */
78 #define PSKIP(kp) ((kp)->ki_pid == mypid || \
79 (!kthreads && ((kp)->ki_flag & P_KTHREAD) != 0))
92 SLIST_ENTRY(list) li_chain;
96 SLIST_HEAD(listhead, list);
98 static struct kinfo_proc *plist;
99 static char *selected;
100 static const char *delim = "\n";
103 static int signum = SIGTERM;
106 static int interactive;
109 static int matchargs;
110 static int fullmatch;
112 static int cflags = REG_EXTENDED;
116 static struct listhead euidlist = SLIST_HEAD_INITIALIZER(euidlist);
117 static struct listhead ruidlist = SLIST_HEAD_INITIALIZER(ruidlist);
118 static struct listhead rgidlist = SLIST_HEAD_INITIALIZER(rgidlist);
119 static struct listhead pgrplist = SLIST_HEAD_INITIALIZER(pgrplist);
120 static struct listhead ppidlist = SLIST_HEAD_INITIALIZER(ppidlist);
121 static struct listhead tdevlist = SLIST_HEAD_INITIALIZER(tdevlist);
122 static struct listhead sidlist = SLIST_HEAD_INITIALIZER(sidlist);
123 static struct listhead jidlist = SLIST_HEAD_INITIALIZER(jidlist);
125 static void usage(void) __attribute__((__noreturn__));
126 static int killact(const struct kinfo_proc *);
127 static int grepact(const struct kinfo_proc *);
128 static void makelist(struct listhead *, enum listtype, char *);
129 static int takepid(const char *, int);
132 main(int argc, char **argv)
134 char buf[_POSIX2_LINE_MAX], *mstr, **pargv, *p, *q, *pidfile;
135 const char *execf, *coref;
136 int ancestors, debug_opt, did_action;
137 int i, ch, bestidx, rv, criteria, pidfromfile, pidfilelock;
139 int (*action)(const struct kinfo_proc *);
140 struct kinfo_proc *kp;
142 struct timeval best_tval;
147 setlocale(LC_ALL, "");
149 if (strcmp(getprogname(), "pgrep") == 0) {
156 if (argc > 1 && p[0] == '-') {
158 i = (int)strtol(p, &q, 10);
164 if (strncasecmp(p, "sig", 3) == 0)
166 for (i = 1; i < NSIG; i++)
167 if (strcasecmp(sys_signame[i], p) == 0)
184 coref = _PATH_DEVNULL;
186 while ((ch = getopt(argc, argv, "DF:G:ILM:N:P:SU:ad:fg:ij:lnos:t:u:vx")) != -1)
196 makelist(&rgidlist, LT_GROUP, optarg);
214 makelist(&ppidlist, LT_GENERIC, optarg);
223 makelist(&ruidlist, LT_USER, optarg);
238 makelist(&pgrplist, LT_PGRP, optarg);
245 makelist(&jidlist, LT_JID, optarg);
260 makelist(&sidlist, LT_SID, optarg);
264 makelist(&tdevlist, LT_TTY, optarg);
268 makelist(&euidlist, LT_USER, optarg);
288 if (newest && oldest)
289 errx(STATUS_ERROR, "Options -n and -o are mutually exclusive");
291 pidfromfile = takepid(pidfile, pidfilelock);
295 "Option -L doesn't make sense without -F");
303 * Retrieve the list of running processes from the kernel.
305 kd = kvm_openfiles(execf, coref, NULL, O_RDONLY, buf);
307 errx(STATUS_ERROR, "Cannot open kernel files (%s)", buf);
310 * Use KERN_PROC_PROC instead of KERN_PROC_ALL, since we
311 * just want processes and not individual kernel threads.
313 plist = kvm_getprocs(kd, KERN_PROC_PROC, 0, &nproc);
315 errx(STATUS_ERROR, "Cannot get process list (%s)",
320 * Allocate memory which will be used to keep track of the
323 if ((selected = malloc(nproc)) == NULL) {
324 err(STATUS_ERROR, "Cannot allocate memory for %d processes",
327 memset(selected, 0, nproc);
330 * Refine the selection.
332 for (; *argv != NULL; argv++) {
333 if ((rv = regcomp(®, *argv, cflags)) != 0) {
334 regerror(rv, ®, buf, sizeof(buf));
335 errx(STATUS_BADUSAGE,
336 "Cannot compile regular expression `%s' (%s)",
340 for (i = 0, kp = plist; i < nproc; i++, kp++) {
343 fprintf(stderr, "* Skipped %5d %3d %s\n",
344 kp->ki_pid, kp->ki_uid, kp->ki_comm);
349 (pargv = kvm_getargv(kd, kp, 0)) != NULL) {
351 while (jsz < sizeof(buf) && *pargv != NULL) {
352 jsz += snprintf(buf + jsz,
354 pargv[1] != NULL ? "%s " : "%s",
362 rv = regexec(®, mstr, 1, ®match, 0);
365 if (regmatch.rm_so == 0 &&
371 } else if (rv != REG_NOMATCH) {
372 regerror(rv, ®, buf, sizeof(buf));
374 "Regular expression evaluation error (%s)",
378 const char *rv_res = "NoMatch";
381 fprintf(stderr, "* %s %5d %3d %s\n", rv_res,
382 kp->ki_pid, kp->ki_uid, mstr);
389 for (i = 0, kp = plist; i < nproc; i++, kp++) {
393 if (pidfromfile >= 0 && kp->ki_pid != pidfromfile) {
398 SLIST_FOREACH(li, &ruidlist, li_chain)
399 if (kp->ki_ruid == (uid_t)li->li_number)
401 if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) {
406 SLIST_FOREACH(li, &rgidlist, li_chain)
407 if (kp->ki_rgid == (gid_t)li->li_number)
409 if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) {
414 SLIST_FOREACH(li, &euidlist, li_chain)
415 if (kp->ki_uid == (uid_t)li->li_number)
417 if (SLIST_FIRST(&euidlist) != NULL && li == NULL) {
422 SLIST_FOREACH(li, &ppidlist, li_chain)
423 if (kp->ki_ppid == (pid_t)li->li_number)
425 if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) {
430 SLIST_FOREACH(li, &pgrplist, li_chain)
431 if (kp->ki_pgid == (pid_t)li->li_number)
433 if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) {
438 SLIST_FOREACH(li, &tdevlist, li_chain) {
439 if (li->li_number == -1 &&
440 (kp->ki_flag & P_CONTROLT) == 0)
442 if (kp->ki_tdev == (dev_t)li->li_number)
445 if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) {
450 SLIST_FOREACH(li, &sidlist, li_chain)
451 if (kp->ki_sid == (pid_t)li->li_number)
453 if (SLIST_FIRST(&sidlist) != NULL && li == NULL) {
458 SLIST_FOREACH(li, &jidlist, li_chain) {
459 /* A particular jail ID, including 0 (not in jail) */
460 if (kp->ki_jid == (int)li->li_number)
463 if (kp->ki_jid > 0 && li->li_number == -1)
466 if (SLIST_FIRST(&jidlist) != NULL && li == NULL) {
478 for (i = 0, kp = plist; i < nproc; i++, kp++) {
481 if (kp->ki_pid == pid) {
491 break; /* Maybe we're in a jail ? */
496 if (newest || oldest) {
497 best_tval.tv_sec = 0;
498 best_tval.tv_usec = 0;
501 for (i = 0, kp = plist; i < nproc; i++, kp++) {
505 /* The first entry of the list which matched. */
507 } else if (timercmp(&kp->ki_start, &best_tval, >)) {
508 /* This entry is newer than previous "best". */
509 if (oldest) /* but we want the oldest */
512 /* This entry is older than previous "best". */
513 if (newest) /* but we want the newest */
516 /* This entry is better than previous "best" entry. */
517 best_tval.tv_sec = kp->ki_start.tv_sec;
518 best_tval.tv_usec = kp->ki_start.tv_usec;
522 memset(selected, 0, nproc);
524 selected[bestidx] = 1;
528 * Take the appropriate action for each matched process, if any.
531 for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) {
535 if (longfmt && !pgrep) {
537 printf("kill -%d %d\n", signum, kp->ki_pid);
545 if (!did_action && !pgrep && longfmt)
547 "No matching processes belonging to you were found\n");
549 exit(rv ? STATUS_MATCH : STATUS_NOMATCH);
558 ustr = "[-LSfilnovx] [-d delim]";
560 ustr = "[-signal] [-ILfilnovx]";
563 "usage: %s %s [-F pidfile] [-G gid] [-M core] [-N system]\n"
564 " [-P ppid] [-U uid] [-g pgrp] [-j jid] [-s sid]\n"
565 " [-t tty] [-u euid] pattern ...\n", getprogname(),
568 exit(STATUS_BADUSAGE);
572 show_process(const struct kinfo_proc *kp)
576 if ((longfmt || !pgrep) && matchargs &&
577 (argv = kvm_getargv(kd, kp, 0)) != NULL) {
578 printf("%d ", (int)kp->ki_pid);
579 for (; *argv != NULL; argv++) {
584 } else if (longfmt || !pgrep)
585 printf("%d %s", (int)kp->ki_pid, kp->ki_comm);
587 printf("%d", (int)kp->ki_pid);
591 killact(const struct kinfo_proc *kp)
597 * Be careful, ask before killing.
603 first = ch = getchar();
604 while (ch != '\n' && ch != EOF)
606 if (first != 'y' && first != 'Y')
609 if (kill(kp->ki_pid, signum) == -1) {
611 * Check for ESRCH, which indicates that the process
612 * disappeared between us matching it and us
613 * signalling it; don't issue a warning about it.
616 warn("signalling pid %d", (int)kp->ki_pid);
618 * Return 0 to indicate that the process should not be
619 * considered a match, since we didn't actually get to
628 grepact(const struct kinfo_proc *kp)
637 makelist(struct listhead *head, enum listtype type, char *src)
644 char *sp, *ep, buf[MAXPATHLEN];
649 while ((sp = strsep(&src, ",")) != NULL) {
653 if ((li = malloc(sizeof(*li))) == NULL) {
654 err(STATUS_ERROR, "Cannot allocate %zu bytes",
658 SLIST_INSERT_HEAD(head, li, li_chain);
661 li->li_number = (uid_t)strtol(sp, &ep, 0);
665 if (li->li_number == 0)
666 li->li_number = getpgrp();
669 if (li->li_number == 0)
670 li->li_number = getsid(mypid);
673 if (li->li_number < 0)
674 errx(STATUS_BADUSAGE,
675 "Negative jail ID `%s'", sp);
676 /* For compatibility with old -j */
677 if (li->li_number == 0)
678 li->li_number = -1; /* any jail */
691 if ((pw = getpwnam(sp)) == NULL)
692 errx(STATUS_BADUSAGE, "Unknown user `%s'", sp);
693 li->li_number = pw->pw_uid;
696 if ((gr = getgrnam(sp)) == NULL)
697 errx(STATUS_BADUSAGE, "Unknown group `%s'", sp);
698 li->li_number = gr->gr_gid;
701 if (strcmp(sp, "-") == 0) {
704 } else if (strcmp(sp, "co") == 0) {
710 snprintf(buf, sizeof(buf), _PATH_DEV "%s", cp);
711 if (stat(buf, &st) != -1)
714 snprintf(buf, sizeof(buf), _PATH_DEV "tty%s", cp);
715 if (stat(buf, &st) != -1)
719 errx(STATUS_BADUSAGE, "No such tty: `%s'", sp);
720 err(STATUS_ERROR, "Cannot access `%s'", sp);
722 foundtty: if ((st.st_mode & S_IFCHR) == 0)
723 errx(STATUS_BADUSAGE, "Not a tty: `%s'", sp);
725 li->li_number = st.st_rdev;
728 if (strcmp(sp, "none") == 0)
730 else if (strcmp(sp, "any") == 0)
732 else if (*ep != '\0')
733 errx(STATUS_BADUSAGE,
734 "Invalid jail ID `%s'", sp);
746 takepid(const char *pidfile, int pidfilelock)
748 char *endp, line[BUFSIZ];
752 fh = fopen(pidfile, "r");
754 err(STATUS_ERROR, "Cannot open pidfile `%s'", pidfile);
758 * If we can lock pidfile, this means that daemon is not
759 * running, so would be better not to kill some random process.
761 if (flock(fileno(fh), LOCK_EX | LOCK_NB) == 0) {
763 errx(STATUS_ERROR, "File '%s' can be locked", pidfile);
765 if (errno != EWOULDBLOCK) {
767 "Error while locking file '%s'", pidfile);
772 if (fgets(line, sizeof(line), fh) == NULL) {
775 errx(STATUS_ERROR, "Pidfile `%s' is empty", pidfile);
778 err(STATUS_ERROR, "Cannot read from pid file `%s'", pidfile);
782 rval = strtol(line, &endp, 10);
783 if (*endp != '\0' && !isspace((unsigned char)*endp))
784 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile);
785 else if (rval < MIN_PID || rval > MAX_PID)
786 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile);