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.
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
32 * $FreeBSD: head/bin/pkill/pkill.c 256050 2013-10-04 16:08:44Z trasz $
36 #include <sys/types.h>
37 #include <sys/param.h>
38 #include <sys/sysctl.h>
39 #include <sys/queue.h>
41 #include <sys/fcntl.h>
62 #define STATUS_MATCH 0
63 #define STATUS_NOMATCH 1
64 #define STATUS_BADUSAGE 2
65 #define STATUS_ERROR 3
68 #define MAX_PID PID_MAX
70 /* Ignore system-processes (if '-S' flag is not specified) and myself. */
71 #define PSKIP(kp) ((kp)->kp_pid == mypid || \
72 (!kthreads && ((kp)->kp_flags & P_KTHREADP) != 0))
86 SLIST_ENTRY(list) li_chain;
91 SLIST_HEAD(listhead, list);
93 static struct kinfo_proc *plist;
94 static char *selected;
95 static const char *delim = "\n";
98 static int signum = SIGTERM;
101 static int interactive;
104 static int matchargs;
105 static int fullmatch;
107 static int cflags = REG_EXTENDED;
112 static struct listhead euidlist = SLIST_HEAD_INITIALIZER(euidlist);
113 static struct listhead ruidlist = SLIST_HEAD_INITIALIZER(ruidlist);
114 static struct listhead rgidlist = SLIST_HEAD_INITIALIZER(rgidlist);
115 static struct listhead pgrplist = SLIST_HEAD_INITIALIZER(pgrplist);
116 static struct listhead ppidlist = SLIST_HEAD_INITIALIZER(ppidlist);
117 static struct listhead tdevlist = SLIST_HEAD_INITIALIZER(tdevlist);
118 static struct listhead sidlist = SLIST_HEAD_INITIALIZER(sidlist);
119 static struct listhead jidlist = SLIST_HEAD_INITIALIZER(jidlist);
120 static struct listhead classlist = SLIST_HEAD_INITIALIZER(classlist);
122 static void usage(void) __attribute__((__noreturn__));
123 static int killact(const struct kinfo_proc *);
124 static int grepact(const struct kinfo_proc *);
125 static void makelist(struct listhead *, enum listtype, char *);
126 static int takepid(const char *, int);
129 main(int argc, char **argv)
131 char buf[_POSIX2_LINE_MAX], *mstr, **pargv, *p, *q, *pidfile;
132 const char *execf, *coref;
133 int ancestors, debug_opt, did_action;
134 int i, ch, bestidx, rv, criteria, pidfromfile, pidfilelock;
136 int (*action)(const struct kinfo_proc *);
137 struct kinfo_proc *kp;
139 struct timeval best_tval;
144 setlocale(LC_ALL, "");
146 if (strcmp(getprogname(), "pgrep") == 0) {
153 if (argc > 1 && p[0] == '-') {
155 i = (int)strtol(p, &q, 10);
161 if (strncasecmp(p, "SIG", 3) == 0)
163 for (i = 1; i < NSIG; i++)
164 if (strcasecmp(sys_signame[i], p) == 0)
182 coref = _PATH_DEVNULL;
184 while ((ch = getopt(argc, argv, "DF:G:ILM:N:P:SU:ac:d:fg:ij:lnoqs:t:u:vx")) != -1)
194 makelist(&rgidlist, LT_GROUP, optarg);
212 makelist(&ppidlist, LT_GENERIC, optarg);
221 makelist(&ruidlist, LT_USER, optarg);
228 makelist(&classlist, LT_CLASS, optarg);
240 makelist(&pgrplist, LT_PGRP, optarg);
247 makelist(&jidlist, LT_JID, optarg);
267 makelist(&sidlist, LT_SID, optarg);
271 makelist(&tdevlist, LT_TTY, optarg);
275 makelist(&euidlist, LT_USER, optarg);
295 if (newest && oldest)
296 errx(STATUS_ERROR, "Options -n and -o are mutually exclusive");
298 pidfromfile = takepid(pidfile, pidfilelock);
302 "Option -L doesn't make sense without -F");
310 * Retrieve the list of running processes from the kernel.
312 kd = kvm_openfiles(execf, coref, NULL, O_RDONLY, buf);
314 errx(STATUS_ERROR, "Cannot open kernel files (%s)", buf);
316 if (pidfromfile >= 0)
317 plist = kvm_getprocs(kd, KERN_PROC_PID, pidfromfile, &nproc);
319 plist = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nproc);
321 errx(STATUS_ERROR, "Cannot get process list (%s)",
326 * Allocate memory which will be used to keep track of the
329 if ((selected = malloc(nproc)) == NULL) {
330 err(STATUS_ERROR, "Cannot allocate memory for %d processes",
333 memset(selected, 0, nproc);
336 * Refine the selection.
338 for (; *argv != NULL; argv++) {
339 if ((rv = regcomp(®, *argv, cflags)) != 0) {
340 regerror(rv, ®, buf, sizeof(buf));
341 errx(STATUS_BADUSAGE,
342 "Cannot compile regular expression `%s' (%s)",
346 for (i = 0, kp = plist; i < nproc; i++, kp++) {
349 fprintf(stderr, "* Skipped %5d %3d %s\n",
350 kp->kp_pid, kp->kp_uid, kp->kp_comm);
355 (pargv = kvm_getargv(kd, kp, 0)) != NULL) {
357 while (jsz < sizeof(buf) && *pargv != NULL) {
358 jsz += snprintf(buf + jsz,
360 pargv[1] != NULL ? "%s " : "%s",
368 rv = regexec(®, mstr, 1, ®match, 0);
371 if (regmatch.rm_so == 0 &&
377 } else if (rv != REG_NOMATCH) {
378 regerror(rv, ®, buf, sizeof(buf));
380 "Regular expression evaluation error (%s)",
384 const char *rv_res = "NoMatch";
387 fprintf(stderr, "* %s %5d %3d %s\n", rv_res,
388 kp->kp_pid, kp->kp_uid, mstr);
395 for (i = 0, kp = plist; i < nproc; i++, kp++) {
399 if (pidfromfile >= 0 && kp->kp_pid != pidfromfile) {
404 SLIST_FOREACH(li, &ruidlist, li_chain)
405 if (kp->kp_ruid == (uid_t)li->li_number)
407 if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) {
412 SLIST_FOREACH(li, &rgidlist, li_chain)
413 if (kp->kp_rgid == (gid_t)li->li_number)
415 if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) {
420 SLIST_FOREACH(li, &euidlist, li_chain)
421 if (kp->kp_uid == (uid_t)li->li_number)
423 if (SLIST_FIRST(&euidlist) != NULL && li == NULL) {
428 SLIST_FOREACH(li, &ppidlist, li_chain)
429 if (kp->kp_ppid == (pid_t)li->li_number)
431 if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) {
436 SLIST_FOREACH(li, &pgrplist, li_chain)
437 if (kp->kp_pgid == (pid_t)li->li_number)
439 if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) {
444 SLIST_FOREACH(li, &tdevlist, li_chain) {
445 if (li->li_number == -1 &&
446 (kp->kp_flags & P_CONTROLT) == 0)
448 if (kp->kp_tdev == (dev_t)li->li_number)
451 if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) {
456 SLIST_FOREACH(li, &sidlist, li_chain)
457 if (kp->kp_sid == (pid_t)li->li_number)
459 if (SLIST_FIRST(&sidlist) != NULL && li == NULL) {
464 SLIST_FOREACH(li, &jidlist, li_chain) {
465 /* A particular jail ID, including 0 (not in jail) */
466 if (kp->kp_jailid == (int)li->li_number)
469 if (kp->kp_jailid > 0 && li->li_number == -1)
472 if (SLIST_FIRST(&jidlist) != NULL && li == NULL) {
477 SLIST_FOREACH(li, &classlist, li_chain) {
479 * We skip P_SYSTEM processes to match ps(1) output.
481 if ((kp->kp_flags & P_SYSTEM) == 0)
484 if (SLIST_FIRST(&classlist) != NULL && li == NULL) {
496 for (i = 0, kp = plist; i < nproc; i++, kp++) {
499 if (kp->kp_pid == pid) {
509 break; /* Maybe we're in a jail ? */
514 if (newest || oldest) {
515 best_tval.tv_sec = 0;
516 best_tval.tv_usec = 0;
519 for (i = 0, kp = plist; i < nproc; i++, kp++) {
523 /* The first entry of the list which matched. */
525 } else if (timercmp(&kp->kp_start, &best_tval, >)) {
526 /* This entry is newer than previous "best". */
527 if (oldest) /* but we want the oldest */
530 /* This entry is older than previous "best". */
531 if (newest) /* but we want the newest */
534 /* This entry is better than previous "best" entry. */
535 best_tval.tv_sec = kp->kp_start.tv_sec;
536 best_tval.tv_usec = kp->kp_start.tv_usec;
540 memset(selected, 0, nproc);
542 selected[bestidx] = 1;
546 * Take the appropriate action for each matched process, if any.
549 for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) {
553 if (longfmt && !pgrep) {
555 printf("kill -%d %d\n", signum, kp->kp_pid);
563 if (!did_action && !pgrep && longfmt)
565 "No matching processes belonging to you were found\n");
567 exit(rv ? STATUS_MATCH : STATUS_NOMATCH);
576 ustr = "[-LSfilnoqvx] [-d delim]";
578 ustr = "[-signal] [-ILfilnovx]";
581 "usage: %s %s [-F pidfile] [-G gid] [-M core] [-N system]\n"
582 " [-P ppid] [-U uid] [-c class] [-g pgrp] [-j jid]\n"
583 " [-s sid] [-t tty] [-u euid] pattern ...\n",
584 getprogname(), ustr);
586 exit(STATUS_BADUSAGE);
590 show_process(const struct kinfo_proc *kp)
598 if ((longfmt || !pgrep) && matchargs &&
599 (argv = kvm_getargv(kd, kp, 0)) != NULL) {
600 printf("%d ", (int)kp->kp_pid);
601 for (; *argv != NULL; argv++) {
606 } else if (longfmt || !pgrep)
607 printf("%d %s", (int)kp->kp_pid, kp->kp_comm);
609 printf("%d", (int)kp->kp_pid);
613 killact(const struct kinfo_proc *kp)
619 * Be careful, ask before killing.
625 first = ch = getchar();
626 while (ch != '\n' && ch != EOF)
628 if (first != 'y' && first != 'Y')
631 if (kill(kp->kp_pid, signum) == -1) {
633 * Check for ESRCH, which indicates that the process
634 * disappeared between us matching it and us
635 * signalling it; don't issue a warning about it.
638 warn("signalling pid %d", (int)kp->kp_pid);
640 * Return 0 to indicate that the process should not be
641 * considered a match, since we didn't actually get to
650 grepact(const struct kinfo_proc *kp)
660 makelist(struct listhead *head, enum listtype type, char *src)
667 char *sp, *ep, buf[MAXPATHLEN];
672 while ((sp = strsep(&src, ",")) != NULL) {
676 if ((li = malloc(sizeof(*li))) == NULL) {
677 err(STATUS_ERROR, "Cannot allocate %zu bytes",
681 SLIST_INSERT_HEAD(head, li, li_chain);
684 if (type != LT_CLASS)
685 li->li_number = (uid_t)strtol(sp, &ep, 0);
687 if (type != LT_CLASS && *ep == '\0') {
690 if (li->li_number == 0)
691 li->li_number = getpgrp();
694 if (li->li_number == 0)
695 li->li_number = getsid(mypid);
698 if (li->li_number < 0)
699 errx(STATUS_BADUSAGE,
700 "Negative jail ID `%s'", sp);
701 /* For compatibility with old -j */
702 if (li->li_number == 0)
703 li->li_number = -1; /* any jail */
706 if (li->li_number < 0)
707 errx(STATUS_BADUSAGE,
708 "Negative /dev/pts tty `%s'", sp);
709 snprintf(buf, sizeof(buf), _PATH_DEV "pts/%s",
711 if (stat(buf, &st) != -1)
714 errx(STATUS_BADUSAGE, "No such tty: `"
715 _PATH_DEV "pts/%s'", sp);
716 err(STATUS_ERROR, "Cannot access `"
717 _PATH_DEV "pts/%s'", sp);
727 if ((pw = getpwnam(sp)) == NULL)
728 errx(STATUS_BADUSAGE, "Unknown user `%s'", sp);
729 li->li_number = pw->pw_uid;
732 if ((gr = getgrnam(sp)) == NULL)
733 errx(STATUS_BADUSAGE, "Unknown group `%s'", sp);
734 li->li_number = gr->gr_gid;
737 if (strcmp(sp, "-") == 0) {
740 } else if (strcmp(sp, "co") == 0) {
746 snprintf(buf, sizeof(buf), _PATH_DEV "%s", cp);
747 if (stat(buf, &st) != -1)
750 snprintf(buf, sizeof(buf), _PATH_DEV "tty%s", cp);
751 if (stat(buf, &st) != -1)
755 errx(STATUS_BADUSAGE, "No such tty: `%s'", sp);
756 err(STATUS_ERROR, "Cannot access `%s'", sp);
758 foundtty: if ((st.st_mode & S_IFCHR) == 0)
759 errx(STATUS_BADUSAGE, "Not a tty: `%s'", sp);
761 li->li_number = st.st_rdev;
764 if (strcmp(sp, "none") == 0)
766 else if (strcmp(sp, "any") == 0)
768 else if (*ep != '\0')
769 errx(STATUS_BADUSAGE,
770 "Invalid jail ID `%s'", sp);
774 li->li_name = strdup(sp);
775 if (li->li_name == NULL)
776 err(STATUS_ERROR, "Cannot allocate memory");
788 takepid(const char *pidfile, int pidfilelock)
790 char *endp, line[BUFSIZ];
794 fh = fopen(pidfile, "r");
796 err(STATUS_ERROR, "Cannot open pidfile `%s'", pidfile);
800 * If we can lock pidfile, this means that daemon is not
801 * running, so would be better not to kill some random process.
803 if (flock(fileno(fh), LOCK_EX | LOCK_NB) == 0) {
805 errx(STATUS_ERROR, "File '%s' can be locked", pidfile);
807 if (errno != EWOULDBLOCK) {
809 "Error while locking file '%s'", pidfile);
814 if (fgets(line, sizeof(line), fh) == NULL) {
817 errx(STATUS_ERROR, "Pidfile `%s' is empty", pidfile);
820 err(STATUS_ERROR, "Cannot read from pid file `%s'", pidfile);
824 rval = strtol(line, &endp, 10);
825 if (*endp != '\0' && !isspace((unsigned char)*endp))
826 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile);
827 else if (rval < MIN_PID || rval > MAX_PID)
828 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile);