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(list);
117 static struct listhead ruidlist = SLIST_HEAD_INITIALIZER(list);
118 static struct listhead rgidlist = SLIST_HEAD_INITIALIZER(list);
119 static struct listhead pgrplist = SLIST_HEAD_INITIALIZER(list);
120 static struct listhead ppidlist = SLIST_HEAD_INITIALIZER(list);
121 static struct listhead tdevlist = SLIST_HEAD_INITIALIZER(list);
122 static struct listhead sidlist = SLIST_HEAD_INITIALIZER(list);
123 static struct listhead jidlist = SLIST_HEAD_INITIALIZER(list);
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;
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;
146 setlocale(LC_ALL, "");
148 if (strcmp(getprogname(), "pgrep") == 0) {
155 if (argc > 1 && p[0] == '-') {
157 i = (int)strtol(p, &q, 10);
163 if (strncasecmp(p, "sig", 3) == 0)
165 for (i = 1; i < NSIG; i++)
166 if (strcasecmp(sys_signame[i], p) == 0)
181 execf = coref = _PATH_DEVNULL;
183 while ((ch = getopt(argc, argv, "DF:G:ILM:N:P:SU:d:fg:ij:lnos:t:u:vx")) != -1)
193 makelist(&rgidlist, LT_GROUP, optarg);
211 makelist(&ppidlist, LT_GENERIC, optarg);
220 makelist(&ruidlist, LT_USER, optarg);
232 makelist(&pgrplist, LT_PGRP, optarg);
239 makelist(&jidlist, LT_JID, optarg);
256 makelist(&sidlist, LT_SID, optarg);
260 makelist(&tdevlist, LT_TTY, optarg);
264 makelist(&euidlist, LT_USER, optarg);
284 if (newest && oldest)
285 errx(STATUS_ERROR, "Options -n and -o are mutually exclusive");
287 pidfromfile = takepid(pidfile, pidfilelock);
291 "Option -L doesn't make sense without -F");
299 * Retrieve the list of running processes from the kernel.
301 kd = kvm_openfiles(execf, coref, NULL, O_RDONLY, buf);
303 errx(STATUS_ERROR, "Cannot open kernel files (%s)", buf);
306 * Use KERN_PROC_PROC instead of KERN_PROC_ALL, since we
307 * just want processes and not individual kernel threads.
309 plist = kvm_getprocs(kd, KERN_PROC_PROC, 0, &nproc);
311 errx(STATUS_ERROR, "Cannot get process list (%s)",
316 * Allocate memory which will be used to keep track of the
319 if ((selected = malloc(nproc)) == NULL) {
320 err(STATUS_ERROR, "Cannot allocate memory for %d processes",
323 memset(selected, 0, nproc);
326 * Refine the selection.
328 for (; *argv != NULL; argv++) {
329 if ((rv = regcomp(®, *argv, cflags)) != 0) {
330 regerror(rv, ®, buf, sizeof(buf));
331 errx(STATUS_BADUSAGE,
332 "Cannot compile regular expression `%s' (%s)",
336 for (i = 0, kp = plist; i < nproc; i++, kp++) {
339 fprintf(stderr, "* Skipped %5d %3d %s\n",
340 kp->ki_pid, kp->ki_uid, kp->ki_comm);
345 (pargv = kvm_getargv(kd, kp, 0)) != NULL) {
347 while (jsz < sizeof(buf) && *pargv != NULL) {
348 jsz += snprintf(buf + jsz,
350 pargv[1] != NULL ? "%s " : "%s",
358 rv = regexec(®, mstr, 1, ®match, 0);
361 if (regmatch.rm_so == 0 &&
367 } else if (rv != REG_NOMATCH) {
368 regerror(rv, ®, buf, sizeof(buf));
370 "Regular expression evaluation error (%s)",
374 const char *rv_res = "NoMatch";
377 fprintf(stderr, "* %s %5d %3d %s\n", rv_res,
378 kp->ki_pid, kp->ki_uid, mstr);
385 for (i = 0, kp = plist; i < nproc; i++, kp++) {
389 if (pidfromfile >= 0 && kp->ki_pid != pidfromfile) {
394 SLIST_FOREACH(li, &ruidlist, li_chain)
395 if (kp->ki_ruid == (uid_t)li->li_number)
397 if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) {
402 SLIST_FOREACH(li, &rgidlist, li_chain)
403 if (kp->ki_rgid == (gid_t)li->li_number)
405 if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) {
410 SLIST_FOREACH(li, &euidlist, li_chain)
411 if (kp->ki_uid == (uid_t)li->li_number)
413 if (SLIST_FIRST(&euidlist) != NULL && li == NULL) {
418 SLIST_FOREACH(li, &ppidlist, li_chain)
419 if (kp->ki_ppid == (pid_t)li->li_number)
421 if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) {
426 SLIST_FOREACH(li, &pgrplist, li_chain)
427 if (kp->ki_pgid == (pid_t)li->li_number)
429 if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) {
434 SLIST_FOREACH(li, &tdevlist, li_chain) {
435 if (li->li_number == -1 &&
436 (kp->ki_flag & P_CONTROLT) == 0)
438 if (kp->ki_tdev == (dev_t)li->li_number)
441 if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) {
446 SLIST_FOREACH(li, &sidlist, li_chain)
447 if (kp->ki_sid == (pid_t)li->li_number)
449 if (SLIST_FIRST(&sidlist) != NULL && li == NULL) {
454 SLIST_FOREACH(li, &jidlist, li_chain) {
455 /* A particular jail ID, including 0 (not in jail) */
456 if (kp->ki_jid == (int)li->li_number)
459 if (kp->ki_jid > 0 && li->li_number == -1)
462 if (SLIST_FIRST(&jidlist) != NULL && li == NULL) {
471 if (newest || oldest) {
472 best_tval.tv_sec = 0;
473 best_tval.tv_usec = 0;
476 for (i = 0, kp = plist; i < nproc; i++, kp++) {
480 /* The first entry of the list which matched. */
482 } else if (timercmp(&kp->ki_start, &best_tval, >)) {
483 /* This entry is newer than previous "best". */
484 if (oldest) /* but we want the oldest */
487 /* This entry is older than previous "best". */
488 if (newest) /* but we want the newest */
491 /* This entry is better than previous "best" entry. */
492 best_tval.tv_sec = kp->ki_start.tv_sec;
493 best_tval.tv_usec = kp->ki_start.tv_usec;
497 memset(selected, 0, nproc);
499 selected[bestidx] = 1;
503 * Take the appropriate action for each matched process, if any.
505 for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) {
516 exit(rv ? STATUS_MATCH : STATUS_NOMATCH);
525 ustr = "[-LSfilnovx] [-d delim]";
527 ustr = "[-signal] [-ILfinovx]";
530 "usage: %s %s [-F pidfile] [-G gid] [-M core] [-N system]\n"
531 " [-P ppid] [-U uid] [-g pgrp] [-j jid] [-s sid]\n"
532 " [-t tty] [-u euid] pattern ...\n", getprogname(),
535 exit(STATUS_BADUSAGE);
539 show_process(const struct kinfo_proc *kp)
543 if ((longfmt || !pgrep) && matchargs &&
544 (argv = kvm_getargv(kd, kp, 0)) != NULL) {
545 printf("%d ", (int)kp->ki_pid);
546 for (; *argv != NULL; argv++) {
551 } else if (longfmt || !pgrep)
552 printf("%d %s", (int)kp->ki_pid, kp->ki_comm);
554 printf("%d", (int)kp->ki_pid);
558 killact(const struct kinfo_proc *kp)
564 * Be careful, ask before killing.
570 first = ch = getchar();
571 while (ch != '\n' && ch != EOF)
573 if (first != 'y' && first != 'Y')
576 if (kill(kp->ki_pid, signum) == -1) {
578 * Check for ESRCH, which indicates that the process
579 * disappeared between us matching it and us
580 * signalling it; don't issue a warning about it.
583 warn("signalling pid %d", (int)kp->ki_pid);
585 * Return 0 to indicate that the process should not be
586 * considered a match, since we didn't actually get to
595 grepact(const struct kinfo_proc *kp)
604 makelist(struct listhead *head, enum listtype type, char *src)
610 const char *cp, *prefix;
611 char *sp, *ep, buf[MAXPATHLEN];
617 while ((sp = strsep(&src, ",")) != NULL) {
621 if ((li = malloc(sizeof(*li))) == NULL) {
622 err(STATUS_ERROR, "Cannot allocate %zu bytes",
626 SLIST_INSERT_HEAD(head, li, li_chain);
629 li->li_number = (uid_t)strtol(sp, &ep, 0);
633 if (li->li_number == 0)
634 li->li_number = getpgrp();
637 if (li->li_number == 0)
638 li->li_number = getsid(mypid);
641 if (li->li_number < 0)
642 errx(STATUS_BADUSAGE,
643 "Negative jail ID `%s'", sp);
644 /* For compatibility with old -j */
645 if (li->li_number == 0)
646 li->li_number = -1; /* any jail */
659 if ((pw = getpwnam(sp)) == NULL)
660 errx(STATUS_BADUSAGE, "Unknown user `%s'", sp);
661 li->li_number = pw->pw_uid;
664 if ((gr = getgrnam(sp)) == NULL)
665 errx(STATUS_BADUSAGE, "Unknown group `%s'", sp);
666 li->li_number = gr->gr_gid;
669 if (strcmp(sp, "-") == 0) {
672 } else if (strcmp(sp, "co") == 0) {
676 if (strncmp(sp, "tty", 3) != 0)
680 snprintf(buf, sizeof(buf), "%s%s", prefix, cp);
682 if (stat(buf, &st) == -1) {
683 if (errno == ENOENT) {
684 errx(STATUS_BADUSAGE,
685 "No such tty: `%s'", sp);
687 err(STATUS_ERROR, "Cannot access `%s'", sp);
690 if ((st.st_mode & S_IFCHR) == 0)
691 errx(STATUS_BADUSAGE, "Not a tty: `%s'", sp);
693 li->li_number = st.st_rdev;
696 if (strcmp(sp, "none") == 0)
698 else if (strcmp(sp, "any") == 0)
700 else if (*ep != '\0')
701 errx(STATUS_BADUSAGE,
702 "Invalid jail ID `%s'", sp);
714 takepid(const char *pidfile, int pidfilelock)
716 char *endp, line[BUFSIZ];
720 fh = fopen(pidfile, "r");
722 err(STATUS_ERROR, "Cannot open pidfile `%s'", pidfile);
726 * If we can lock pidfile, this means that daemon is not
727 * running, so would be better not to kill some random process.
729 if (flock(fileno(fh), LOCK_EX | LOCK_NB) == 0) {
731 errx(STATUS_ERROR, "File '%s' can be locked", pidfile);
733 if (errno != EWOULDBLOCK) {
735 "Error while locking file '%s'", pidfile);
740 if (fgets(line, sizeof(line), fh) == NULL) {
743 errx(STATUS_ERROR, "Pidfile `%s' is empty", pidfile);
746 err(STATUS_ERROR, "Cannot read from pid file `%s'", pidfile);
750 rval = strtol(line, &endp, 10);
751 if (*endp != '\0' && !isspace((unsigned char)*endp))
752 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile);
753 else if (rval < MIN_PID || rval > MAX_PID)
754 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile);