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.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/types.h>
37 #include <sys/param.h>
38 #include <sys/sysctl.h>
40 #include <sys/queue.h>
63 #define STATUS_MATCH 0
64 #define STATUS_NOMATCH 1
65 #define STATUS_BADUSAGE 2
66 #define STATUS_ERROR 3
71 /* Ignore system-processes (if '-S' flag is not specified) and myself. */
72 #define PSKIP(kp) ((kp)->ki_pid == mypid || \
73 (!kthreads && ((kp)->ki_flag & P_KTHREAD) != 0))
87 SLIST_ENTRY(list) li_chain;
92 SLIST_HEAD(listhead, list);
94 static struct kinfo_proc *plist;
95 static char *selected;
96 static const char *delim = "\n";
99 static int signum = SIGTERM;
102 static int interactive;
105 static int matchargs;
106 static int fullmatch;
108 static int cflags = REG_EXTENDED;
113 static struct listhead euidlist = SLIST_HEAD_INITIALIZER(euidlist);
114 static struct listhead ruidlist = SLIST_HEAD_INITIALIZER(ruidlist);
115 static struct listhead rgidlist = SLIST_HEAD_INITIALIZER(rgidlist);
116 static struct listhead pgrplist = SLIST_HEAD_INITIALIZER(pgrplist);
117 static struct listhead ppidlist = SLIST_HEAD_INITIALIZER(ppidlist);
118 static struct listhead tdevlist = SLIST_HEAD_INITIALIZER(tdevlist);
119 static struct listhead sidlist = SLIST_HEAD_INITIALIZER(sidlist);
120 static struct listhead jidlist = SLIST_HEAD_INITIALIZER(jidlist);
121 static struct listhead classlist = SLIST_HEAD_INITIALIZER(classlist);
123 static void usage(void) __attribute__((__noreturn__));
124 static int killact(const struct kinfo_proc *);
125 static int grepact(const struct kinfo_proc *);
126 static void makelist(struct listhead *, enum listtype, char *);
127 static int takepid(const char *, int);
130 main(int argc, char **argv)
132 char buf[_POSIX2_LINE_MAX], *mstr, **pargv, *p, *q, *pidfile;
133 const char *execf, *coref;
134 int ancestors, debug_opt, did_action;
135 int i, ch, bestidx, rv, criteria, pidfromfile, pidfilelock;
137 int (*action)(const struct kinfo_proc *);
138 struct kinfo_proc *kp;
140 struct timeval best_tval;
145 setlocale(LC_ALL, "");
147 if (strcmp(getprogname(), "pgrep") == 0) {
154 if (argc > 1 && p[0] == '-') {
156 i = (int)strtol(p, &q, 10);
162 if (strncasecmp(p, "SIG", 3) == 0)
164 for (i = 1; i < NSIG; i++)
165 if (strcasecmp(sys_signame[i], p) == 0)
183 coref = _PATH_DEVNULL;
185 while ((ch = getopt(argc, argv, "DF:G:ILM:N:P:SU:ac:d:fg:ij:lnoqs:t:u:vx")) != -1)
195 makelist(&rgidlist, LT_GROUP, optarg);
213 makelist(&ppidlist, LT_GENERIC, optarg);
222 makelist(&ruidlist, LT_USER, optarg);
229 makelist(&classlist, LT_CLASS, optarg);
241 makelist(&pgrplist, LT_PGRP, optarg);
248 makelist(&jidlist, LT_JID, optarg);
268 makelist(&sidlist, LT_SID, optarg);
272 makelist(&tdevlist, LT_TTY, optarg);
276 makelist(&euidlist, LT_USER, optarg);
296 if (newest && oldest)
297 errx(STATUS_ERROR, "Options -n and -o are mutually exclusive");
299 pidfromfile = takepid(pidfile, pidfilelock);
303 "Option -L doesn't make sense without -F");
311 * Retrieve the list of running processes from the kernel.
313 kd = kvm_openfiles(execf, coref, NULL, O_RDONLY, buf);
315 errx(STATUS_ERROR, "Cannot open kernel files (%s)", buf);
318 * Use KERN_PROC_PROC instead of KERN_PROC_ALL, since we
319 * just want processes and not individual kernel threads.
321 plist = kvm_getprocs(kd, KERN_PROC_PROC, 0, &nproc);
323 errx(STATUS_ERROR, "Cannot get process list (%s)",
328 * Allocate memory which will be used to keep track of the
331 if ((selected = malloc(nproc)) == NULL) {
332 err(STATUS_ERROR, "Cannot allocate memory for %d processes",
335 memset(selected, 0, nproc);
338 * Refine the selection.
340 for (; *argv != NULL; argv++) {
341 if ((rv = regcomp(®, *argv, cflags)) != 0) {
342 regerror(rv, ®, buf, sizeof(buf));
343 errx(STATUS_BADUSAGE,
344 "Cannot compile regular expression `%s' (%s)",
348 for (i = 0, kp = plist; i < nproc; i++, kp++) {
351 fprintf(stderr, "* Skipped %5d %3d %s\n",
352 kp->ki_pid, kp->ki_uid, kp->ki_comm);
357 (pargv = kvm_getargv(kd, kp, 0)) != NULL) {
359 while (jsz < sizeof(buf) && *pargv != NULL) {
360 jsz += snprintf(buf + jsz,
362 pargv[1] != NULL ? "%s " : "%s",
370 rv = regexec(®, mstr, 1, ®match, 0);
373 if (regmatch.rm_so == 0 &&
379 } else if (rv != REG_NOMATCH) {
380 regerror(rv, ®, buf, sizeof(buf));
382 "Regular expression evaluation error (%s)",
386 const char *rv_res = "NoMatch";
389 fprintf(stderr, "* %s %5d %3d %s\n", rv_res,
390 kp->ki_pid, kp->ki_uid, mstr);
397 for (i = 0, kp = plist; i < nproc; i++, kp++) {
401 if (pidfromfile >= 0 && kp->ki_pid != pidfromfile) {
406 SLIST_FOREACH(li, &ruidlist, li_chain)
407 if (kp->ki_ruid == (uid_t)li->li_number)
409 if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) {
414 SLIST_FOREACH(li, &rgidlist, li_chain)
415 if (kp->ki_rgid == (gid_t)li->li_number)
417 if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) {
422 SLIST_FOREACH(li, &euidlist, li_chain)
423 if (kp->ki_uid == (uid_t)li->li_number)
425 if (SLIST_FIRST(&euidlist) != NULL && li == NULL) {
430 SLIST_FOREACH(li, &ppidlist, li_chain)
431 if (kp->ki_ppid == (pid_t)li->li_number)
433 if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) {
438 SLIST_FOREACH(li, &pgrplist, li_chain)
439 if (kp->ki_pgid == (pid_t)li->li_number)
441 if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) {
446 SLIST_FOREACH(li, &tdevlist, li_chain) {
447 if (li->li_number == -1 &&
448 (kp->ki_flag & P_CONTROLT) == 0)
450 if (kp->ki_tdev == (dev_t)li->li_number)
453 if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) {
458 SLIST_FOREACH(li, &sidlist, li_chain)
459 if (kp->ki_sid == (pid_t)li->li_number)
461 if (SLIST_FIRST(&sidlist) != NULL && li == NULL) {
466 SLIST_FOREACH(li, &jidlist, li_chain) {
467 /* A particular jail ID, including 0 (not in jail) */
468 if (kp->ki_jid == (int)li->li_number)
471 if (kp->ki_jid > 0 && li->li_number == -1)
474 if (SLIST_FIRST(&jidlist) != NULL && li == NULL) {
479 SLIST_FOREACH(li, &classlist, li_chain) {
481 * We skip P_SYSTEM processes to match ps(1) output.
483 if ((kp->ki_flag & P_SYSTEM) == 0 &&
484 strcmp(kp->ki_loginclass, li->li_name) == 0)
487 if (SLIST_FIRST(&classlist) != NULL && li == NULL) {
499 for (i = 0, kp = plist; i < nproc; i++, kp++) {
502 if (kp->ki_pid == pid) {
512 break; /* Maybe we're in a jail ? */
517 if (newest || oldest) {
518 best_tval.tv_sec = 0;
519 best_tval.tv_usec = 0;
522 for (i = 0, kp = plist; i < nproc; i++, kp++) {
526 /* The first entry of the list which matched. */
528 } else if (timercmp(&kp->ki_start, &best_tval, >)) {
529 /* This entry is newer than previous "best". */
530 if (oldest) /* but we want the oldest */
533 /* This entry is older than previous "best". */
534 if (newest) /* but we want the newest */
537 /* This entry is better than previous "best" entry. */
538 best_tval.tv_sec = kp->ki_start.tv_sec;
539 best_tval.tv_usec = kp->ki_start.tv_usec;
543 memset(selected, 0, nproc);
545 selected[bestidx] = 1;
549 * Take the appropriate action for each matched process, if any.
552 for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) {
556 if (longfmt && !pgrep) {
558 printf("kill -%d %d\n", signum, kp->ki_pid);
566 if (!did_action && !pgrep && longfmt)
568 "No matching processes belonging to you were found\n");
570 exit(rv ? STATUS_MATCH : STATUS_NOMATCH);
579 ustr = "[-LSfilnoqvx] [-d delim]";
581 ustr = "[-signal] [-ILfilnovx]";
584 "usage: %s %s [-F pidfile] [-G gid] [-M core] [-N system]\n"
585 " [-P ppid] [-U uid] [-c class] [-g pgrp] [-j jid]\n"
586 " [-s sid] [-t tty] [-u euid] pattern ...\n",
587 getprogname(), ustr);
589 exit(STATUS_BADUSAGE);
593 show_process(const struct kinfo_proc *kp)
601 if ((longfmt || !pgrep) && matchargs &&
602 (argv = kvm_getargv(kd, kp, 0)) != NULL) {
603 printf("%d ", (int)kp->ki_pid);
604 for (; *argv != NULL; argv++) {
609 } else if (longfmt || !pgrep)
610 printf("%d %s", (int)kp->ki_pid, kp->ki_comm);
612 printf("%d", (int)kp->ki_pid);
616 killact(const struct kinfo_proc *kp)
622 * Be careful, ask before killing.
628 first = ch = getchar();
629 while (ch != '\n' && ch != EOF)
631 if (first != 'y' && first != 'Y')
634 if (kill(kp->ki_pid, signum) == -1) {
636 * Check for ESRCH, which indicates that the process
637 * disappeared between us matching it and us
638 * signalling it; don't issue a warning about it.
641 warn("signalling pid %d", (int)kp->ki_pid);
643 * Return 0 to indicate that the process should not be
644 * considered a match, since we didn't actually get to
653 grepact(const struct kinfo_proc *kp)
663 makelist(struct listhead *head, enum listtype type, char *src)
670 char *sp, *ep, buf[MAXPATHLEN];
675 while ((sp = strsep(&src, ",")) != NULL) {
679 if ((li = malloc(sizeof(*li))) == NULL) {
680 err(STATUS_ERROR, "Cannot allocate %zu bytes",
684 SLIST_INSERT_HEAD(head, li, li_chain);
687 if (type != LT_CLASS)
688 li->li_number = (uid_t)strtol(sp, &ep, 0);
690 if (type != LT_CLASS && *ep == '\0') {
693 if (li->li_number == 0)
694 li->li_number = getpgrp();
697 if (li->li_number == 0)
698 li->li_number = getsid(mypid);
701 if (li->li_number < 0)
702 errx(STATUS_BADUSAGE,
703 "Negative jail ID `%s'", sp);
704 /* For compatibility with old -j */
705 if (li->li_number == 0)
706 li->li_number = -1; /* any jail */
709 if (li->li_number < 0)
710 errx(STATUS_BADUSAGE,
711 "Negative /dev/pts tty `%s'", sp);
712 snprintf(buf, sizeof(buf), _PATH_DEV "pts/%s",
714 if (stat(buf, &st) != -1)
717 errx(STATUS_BADUSAGE, "No such tty: `"
718 _PATH_DEV "pts/%s'", sp);
719 err(STATUS_ERROR, "Cannot access `"
720 _PATH_DEV "pts/%s'", sp);
730 if ((pw = getpwnam(sp)) == NULL)
731 errx(STATUS_BADUSAGE, "Unknown user `%s'", sp);
732 li->li_number = pw->pw_uid;
735 if ((gr = getgrnam(sp)) == NULL)
736 errx(STATUS_BADUSAGE, "Unknown group `%s'", sp);
737 li->li_number = gr->gr_gid;
740 if (strcmp(sp, "-") == 0) {
743 } else if (strcmp(sp, "co") == 0) {
749 snprintf(buf, sizeof(buf), _PATH_DEV "%s", cp);
750 if (stat(buf, &st) != -1)
753 snprintf(buf, sizeof(buf), _PATH_DEV "tty%s", cp);
754 if (stat(buf, &st) != -1)
758 errx(STATUS_BADUSAGE, "No such tty: `%s'", sp);
759 err(STATUS_ERROR, "Cannot access `%s'", sp);
761 foundtty: if ((st.st_mode & S_IFCHR) == 0)
762 errx(STATUS_BADUSAGE, "Not a tty: `%s'", sp);
764 li->li_number = st.st_rdev;
767 if (strcmp(sp, "none") == 0)
769 else if (strcmp(sp, "any") == 0)
771 else if (*ep != '\0')
772 errx(STATUS_BADUSAGE,
773 "Invalid jail ID `%s'", sp);
777 li->li_name = strdup(sp);
778 if (li->li_name == NULL)
779 err(STATUS_ERROR, "Cannot allocate memory");
791 takepid(const char *pidfile, int pidfilelock)
793 char *endp, line[BUFSIZ];
797 fh = fopen(pidfile, "r");
799 err(STATUS_ERROR, "Cannot open pidfile `%s'", pidfile);
803 * If we can lock pidfile, this means that daemon is not
804 * running, so would be better not to kill some random process.
806 if (flock(fileno(fh), LOCK_EX | LOCK_NB) == 0) {
808 errx(STATUS_ERROR, "File '%s' can be locked", pidfile);
810 if (errno != EWOULDBLOCK) {
812 "Error while locking file '%s'", pidfile);
817 if (fgets(line, sizeof(line), fh) == NULL) {
820 errx(STATUS_ERROR, "Pidfile `%s' is empty", pidfile);
823 err(STATUS_ERROR, "Cannot read from pid file `%s'", pidfile);
827 rval = strtol(line, &endp, 10);
828 if (*endp != '\0' && !isspace((unsigned char)*endp))
829 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile);
830 else if (rval < MIN_PID || rval > MAX_PID)
831 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile);