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1.43 ! deraadt 1: /* $OpenBSD: pkill.c,v 1.42 2019/12/16 19:21:17 guenther Exp $ */
1.1 millert 2: /* $NetBSD: pkill.c,v 1.5 2002/10/27 11:49:34 kleink Exp $ */
3:
4: /*-
5: * Copyright (c) 2002 The NetBSD Foundation, Inc.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to The NetBSD Foundation
9: * by Andrew Doran.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
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: *
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.
31: */
32:
33: #include <sys/types.h>
34: #include <sys/sysctl.h>
1.43 ! deraadt 35: #include <sys/signal.h>
1.1 millert 36: #include <sys/proc.h>
37: #include <sys/queue.h>
38: #include <sys/stat.h>
1.21 markus 39: #include <sys/socket.h>
1.1 millert 40:
41: #include <stdio.h>
42: #include <stdlib.h>
1.16 millert 43: #include <stdint.h>
1.1 millert 44: #include <limits.h>
45: #include <string.h>
46: #include <unistd.h>
47: #include <signal.h>
48: #include <regex.h>
49: #include <ctype.h>
50: #include <kvm.h>
51: #include <err.h>
52: #include <pwd.h>
53: #include <grp.h>
54: #include <errno.h>
55:
56: #define STATUS_MATCH 0
57: #define STATUS_NOMATCH 1
58: #define STATUS_BADUSAGE 2
59: #define STATUS_ERROR 3
60:
61: enum listtype {
62: LT_GENERIC,
63: LT_USER,
64: LT_GROUP,
65: LT_TTY,
66: LT_PGRP,
1.21 markus 67: LT_SID,
68: LT_RTABLE
1.1 millert 69: };
70:
71: struct list {
72: SLIST_ENTRY(list) li_chain;
73: long li_number;
74: };
75:
76: SLIST_HEAD(listhead, list);
77:
1.19 guenther 78: struct kinfo_proc *plist;
1.1 millert 79: char *selected;
1.39 gsoares 80: const char *delim = "\n";
1.1 millert 81: int nproc;
82: int pgrep;
83: int signum = SIGTERM;
84: int newest;
1.16 millert 85: int oldest;
1.29 espie 86: int quiet;
1.1 millert 87: int inverse;
88: int longfmt;
89: int matchargs;
90: int fullmatch;
1.32 tedu 91: int confirmkill;
1.1 millert 92: kvm_t *kd;
93: pid_t mypid;
94:
95: struct listhead euidlist = SLIST_HEAD_INITIALIZER(list);
96: struct listhead ruidlist = SLIST_HEAD_INITIALIZER(list);
97: struct listhead rgidlist = SLIST_HEAD_INITIALIZER(list);
98: struct listhead pgrplist = SLIST_HEAD_INITIALIZER(list);
99: struct listhead ppidlist = SLIST_HEAD_INITIALIZER(list);
100: struct listhead tdevlist = SLIST_HEAD_INITIALIZER(list);
101: struct listhead sidlist = SLIST_HEAD_INITIALIZER(list);
1.21 markus 102: struct listhead rtablist = SLIST_HEAD_INITIALIZER(list);
1.1 millert 103:
1.39 gsoares 104: static void __dead usage(void);
105: static int killact(struct kinfo_proc *, int);
106: static int grepact(struct kinfo_proc *, int);
107: static void makelist(struct listhead *, enum listtype, char *);
108: static char *getargv(struct kinfo_proc *);
109: static int askyn(struct kinfo_proc *);
1.1 millert 110:
111: extern char *__progname;
112:
1.39 gsoares 113: static char *
1.32 tedu 114: getargv(struct kinfo_proc *kp)
115: {
116: static char buf[_POSIX2_LINE_MAX];
117: char **pargv;
118: size_t j;
119:
120: if ((pargv = kvm_getargv(kd, kp, 0)) == NULL) {
121: strlcpy(buf, kp->p_comm, sizeof(buf));
122: return buf;
123: }
124:
125: j = 0;
126: while (j < sizeof(buf) && *pargv != NULL) {
127: int ret;
128:
129: ret = snprintf(buf + j, sizeof(buf) - j,
130: pargv[1] != NULL ? "%s " : "%s", pargv[0]);
131: if (ret >= sizeof(buf) - j)
132: j += sizeof(buf) - j - 1;
133: else if (ret > 0)
134: j += ret;
135: pargv++;
136: }
137: return buf;
138: }
139:
1.1 millert 140: int
141: main(int argc, char **argv)
142: {
1.32 tedu 143: char buf[_POSIX2_LINE_MAX], *mstr, *p, *q;
1.1 millert 144: int i, j, ch, bestidx, rv, criteria;
1.19 guenther 145: int (*action)(struct kinfo_proc *, int);
146: struct kinfo_proc *kp;
1.1 millert 147: struct list *li;
1.2 millert 148: u_int32_t bestsec, bestusec;
1.1 millert 149: regex_t reg;
150: regmatch_t regmatch;
151:
152: if (strcmp(__progname, "pgrep") == 0) {
153: action = grepact;
154: pgrep = 1;
155: } else {
156: action = killact;
1.2 millert 157: p = argv[1];
1.1 millert 158:
1.2 millert 159: if (argc > 1 && p[0] == '-') {
160: p++;
161: i = (int)strtol(p, &q, 10);
1.1 millert 162: if (*q == '\0') {
163: signum = i;
164: argv++;
165: argc--;
166: } else {
1.2 millert 167: if (strncasecmp(p, "sig", 3) == 0)
168: p += 3;
1.1 millert 169: for (i = 1; i < NSIG; i++)
1.2 millert 170: if (strcasecmp(sys_signame[i], p) == 0)
1.1 millert 171: break;
172: if (i != NSIG) {
173: signum = i;
174: argv++;
175: argc--;
176: }
177: }
178: }
179: }
180:
181: criteria = 0;
182:
1.32 tedu 183: while ((ch = getopt(argc, argv, "G:P:T:U:d:fg:Ilnoqs:t:u:vx")) != -1)
1.1 millert 184: switch (ch) {
185: case 'G':
186: makelist(&rgidlist, LT_GROUP, optarg);
187: criteria = 1;
188: break;
189: case 'P':
190: makelist(&ppidlist, LT_GENERIC, optarg);
191: criteria = 1;
192: break;
1.21 markus 193: case 'T':
194: makelist(&rtablist, LT_RTABLE, optarg);
195: criteria = 1;
196: break;
1.1 millert 197: case 'U':
198: makelist(&ruidlist, LT_USER, optarg);
199: criteria = 1;
200: break;
201: case 'd':
202: if (!pgrep)
203: usage();
204: delim = optarg;
205: break;
206: case 'f':
207: matchargs = 1;
208: break;
209: case 'g':
210: makelist(&pgrplist, LT_PGRP, optarg);
211: criteria = 1;
212: break;
1.32 tedu 213: case 'I':
214: confirmkill = 1;
215: break;
1.1 millert 216: case 'l':
217: longfmt = 1;
218: break;
219: case 'n':
220: newest = 1;
221: criteria = 1;
222: break;
1.16 millert 223: case 'o':
224: oldest = 1;
225: criteria = 1;
226: break;
1.29 espie 227: case 'q':
228: quiet = 1;
229: break;
1.1 millert 230: case 's':
231: makelist(&sidlist, LT_SID, optarg);
232: criteria = 1;
233: break;
234: case 't':
235: makelist(&tdevlist, LT_TTY, optarg);
236: criteria = 1;
237: break;
238: case 'u':
239: makelist(&euidlist, LT_USER, optarg);
240: criteria = 1;
241: break;
242: case 'v':
243: inverse = 1;
244: break;
245: case 'x':
246: fullmatch = 1;
247: break;
248: default:
249: usage();
250: /* NOTREACHED */
251: }
252:
253: argc -= optind;
254: argv += optind;
255: if (argc != 0)
256: criteria = 1;
1.16 millert 257: if (!criteria || (newest && oldest))
1.1 millert 258: usage();
259:
260: mypid = getpid();
261:
262: /*
263: * Retrieve the list of running processes from the kernel.
264: */
265: kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, buf);
266: if (kd == NULL)
267: errx(STATUS_ERROR, "kvm_openfiles(): %s", buf);
268:
1.19 guenther 269: plist = kvm_getprocs(kd, KERN_PROC_ALL, 0, sizeof(*plist), &nproc);
1.1 millert 270: if (plist == NULL)
1.19 guenther 271: errx(STATUS_ERROR, "kvm_getprocs() failed");
1.37 deraadt 272:
1.38 deraadt 273: if (matchargs == 0 && confirmkill == 0) {
274: if (action == killact) {
275: if (pledge("stdio proc", NULL) == -1)
1.39 gsoares 276: err(STATUS_ERROR, "pledge");
1.38 deraadt 277: } else if (action == grepact) {
278: if (pledge("stdio", NULL) == -1)
1.39 gsoares 279: err(STATUS_ERROR, "pledge");
1.38 deraadt 280: }
281: }
1.1 millert 282:
283: /*
284: * Allocate memory which will be used to keep track of the
285: * selection.
286: */
1.35 tedu 287: if ((selected = calloc(nproc, 1)) == NULL)
1.1 millert 288: errx(STATUS_ERROR, "memory allocation failure");
289:
290: /*
291: * Refine the selection.
292: */
293: for (; *argv != NULL; argv++) {
1.11 robert 294: if ((rv = regcomp(®, *argv, REG_EXTENDED)) != 0) {
1.1 millert 295: regerror(rv, ®, buf, sizeof(buf));
296: errx(STATUS_BADUSAGE, "bad expression: %s", buf);
297: }
298:
299: for (i = 0, kp = plist; i < nproc; i++, kp++) {
1.42 guenther 300: if (kp->p_pid == mypid)
1.1 millert 301: continue;
302:
1.32 tedu 303: if (matchargs)
304: mstr = getargv(kp);
305: else
1.2 millert 306: mstr = kp->p_comm;
1.1 millert 307:
308: rv = regexec(®, mstr, 1, ®match, 0);
309: if (rv == 0) {
310: if (fullmatch) {
311: if (regmatch.rm_so == 0 &&
312: regmatch.rm_eo == strlen(mstr))
313: selected[i] = 1;
314: } else
315: selected[i] = 1;
316: } else if (rv != REG_NOMATCH) {
317: regerror(rv, ®, buf, sizeof(buf));
318: errx(STATUS_ERROR, "regexec(): %s", buf);
319: }
320: }
321:
322: regfree(®);
323: }
324:
325: for (i = 0, kp = plist; i < nproc; i++, kp++) {
1.42 guenther 326: if (kp->p_pid == mypid)
1.1 millert 327: continue;
328:
329: SLIST_FOREACH(li, &ruidlist, li_chain)
1.2 millert 330: if (kp->p_ruid == (uid_t)li->li_number)
1.1 millert 331: break;
332: if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) {
333: selected[i] = 0;
334: continue;
335: }
1.3 deraadt 336:
1.1 millert 337: SLIST_FOREACH(li, &rgidlist, li_chain)
1.2 millert 338: if (kp->p_rgid == (gid_t)li->li_number)
1.1 millert 339: break;
340: if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) {
341: selected[i] = 0;
342: continue;
343: }
344:
345: SLIST_FOREACH(li, &euidlist, li_chain)
1.2 millert 346: if (kp->p_uid == (uid_t)li->li_number)
1.1 millert 347: break;
348: if (SLIST_FIRST(&euidlist) != NULL && li == NULL) {
349: selected[i] = 0;
350: continue;
351: }
352:
353: SLIST_FOREACH(li, &ppidlist, li_chain)
1.2 millert 354: if (kp->p_ppid == (uid_t)li->li_number)
1.1 millert 355: break;
356: if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) {
357: selected[i] = 0;
358: continue;
359: }
360:
361: SLIST_FOREACH(li, &pgrplist, li_chain)
1.2 millert 362: if (kp->p__pgid == (uid_t)li->li_number)
1.1 millert 363: break;
364: if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) {
365: selected[i] = 0;
366: continue;
367: }
368:
369: SLIST_FOREACH(li, &tdevlist, li_chain) {
370: if (li->li_number == -1 &&
1.33 guenther 371: (kp->p_psflags & PS_CONTROLT) == 0)
1.1 millert 372: break;
1.2 millert 373: if (kp->p_tdev == (uid_t)li->li_number)
1.1 millert 374: break;
375: }
376: if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) {
377: selected[i] = 0;
378: continue;
379: }
380:
381: SLIST_FOREACH(li, &sidlist, li_chain)
1.2 millert 382: if (kp->p_sid == (uid_t)li->li_number)
1.1 millert 383: break;
384: if (SLIST_FIRST(&sidlist) != NULL && li == NULL) {
385: selected[i] = 0;
386: continue;
387: }
388:
1.21 markus 389: SLIST_FOREACH(li, &rtablist, li_chain)
390: if (kp->p_rtableid == (u_int32_t)li->li_number)
391: break;
392: if (SLIST_FIRST(&rtablist) != NULL && li == NULL) {
393: selected[i] = 0;
394: continue;
395: }
396:
1.1 millert 397: if (argc == 0)
398: selected[i] = 1;
399: }
400:
1.16 millert 401: if (newest || oldest) {
1.1 millert 402: bestidx = -1;
403:
1.16 millert 404: if (newest)
405: bestsec = bestusec = 0;
406: else
407: bestsec = bestusec = UINT32_MAX;
408:
1.1 millert 409: for (i = 0, kp = plist; i < nproc; i++, kp++) {
410: if (!selected[i])
411: continue;
412:
1.16 millert 413: if ((newest && (kp->p_ustart_sec > bestsec ||
1.2 millert 414: (kp->p_ustart_sec == bestsec
1.16 millert 415: && kp->p_ustart_usec > bestusec)))
416: || (oldest && (kp->p_ustart_sec < bestsec ||
417: (kp->p_ustart_sec == bestsec
418: && kp->p_ustart_usec < bestusec)))) {
419:
1.3 deraadt 420: bestsec = kp->p_ustart_sec;
421: bestusec = kp->p_ustart_usec;
1.1 millert 422: bestidx = i;
423: }
424: }
425:
426: memset(selected, 0, nproc);
427: if (bestidx != -1)
428: selected[bestidx] = 1;
429: }
430:
431: /*
432: * Take the appropriate action for each matched process, if any.
433: */
1.8 millert 434: rv = STATUS_NOMATCH;
435: for (i = 0, j = 0, kp = plist; i < nproc; i++, kp++) {
1.42 guenther 436: if (kp->p_pid == mypid)
1.1 millert 437: continue;
1.28 halex 438: if (selected[i] == inverse)
1.1 millert 439: continue;
440:
1.31 halex 441: switch ((*action)(kp, j++)) {
442: case STATUS_MATCH:
443: if (rv != STATUS_ERROR)
444: rv = STATUS_MATCH;
445: break;
446: case STATUS_NOMATCH:
447: j--;
448: break;
449: case STATUS_ERROR:
1.4 millert 450: rv = STATUS_ERROR;
1.31 halex 451: break;
452: }
1.1 millert 453: }
1.29 espie 454: if (pgrep && j && !quiet)
1.8 millert 455: putchar('\n');
1.1 millert 456:
1.39 gsoares 457: return(rv);
1.1 millert 458: }
459:
1.39 gsoares 460: static void __dead
1.1 millert 461: usage(void)
462: {
463: const char *ustr;
464:
465: if (pgrep)
1.30 ajacouto 466: ustr = "[-flnoqvx] [-d delim]";
1.1 millert 467: else
1.32 tedu 468: ustr = "[-signal] [-fIlnoqvx]";
1.1 millert 469:
1.22 jmc 470: fprintf(stderr, "usage: %s %s [-G gid] [-g pgrp] [-P ppid] [-s sid]"
471: "\n\t[-T rtable] [-t tty] [-U uid] [-u euid] [pattern ...]\n",
1.21 markus 472: __progname, ustr);
1.1 millert 473:
1.23 jmc 474: exit(STATUS_BADUSAGE);
1.1 millert 475: }
476:
1.39 gsoares 477: static int
1.32 tedu 478: askyn(struct kinfo_proc *kp)
479: {
480: int first, ch;
481:
482: printf("kill %d %.60s? ", (int)kp->p_pid, getargv(kp));
483: fflush(stdout);
484:
485: first = ch = getchar();
486: while (ch != '\n' && ch != EOF)
487: ch = getchar();
488: return (first == 'y' || first == 'Y');
489: }
490:
1.39 gsoares 491: static int
1.19 guenther 492: killact(struct kinfo_proc *kp, int dummy)
1.1 millert 493: {
1.32 tedu 494: int doit;
495:
496: if (confirmkill) {
497: doit = askyn(kp);
498: } else {
499: if (longfmt && !quiet)
500: printf("%d %s\n", (int)kp->p_pid, kp->p_comm);
501: doit = 1;
502: }
1.1 millert 503:
1.32 tedu 504: if (doit && kill(kp->p_pid, signum) == -1) {
1.31 halex 505: if (errno == ESRCH)
506: return (STATUS_NOMATCH);
1.4 millert 507: warn("signalling pid %d", (int)kp->p_pid);
1.31 halex 508: return (STATUS_ERROR);
1.4 millert 509: }
1.31 halex 510: return (STATUS_MATCH);
1.1 millert 511: }
512:
1.39 gsoares 513: static int
1.19 guenther 514: grepact(struct kinfo_proc *kp, int printdelim)
1.1 millert 515: {
516: char **argv;
517:
1.29 espie 518: if (quiet)
1.31 halex 519: return (STATUS_MATCH);
520: if (longfmt && matchargs)
521: if ((argv = kvm_getargv(kd, kp, 0)) == NULL)
522: return (errno == ESRCH ? STATUS_NOMATCH : STATUS_ERROR);
1.8 millert 523: if (printdelim)
524: fputs(delim, stdout);
1.1 millert 525: if (longfmt && matchargs) {
1.2 millert 526: printf("%d ", (int)kp->p_pid);
1.1 millert 527: for (; *argv != NULL; argv++) {
528: printf("%s", *argv);
529: if (argv[1] != NULL)
530: putchar(' ');
531: }
532: } else if (longfmt)
1.2 millert 533: printf("%d %s", (int)kp->p_pid, kp->p_comm);
1.1 millert 534: else
1.2 millert 535: printf("%d", (int)kp->p_pid);
1.1 millert 536:
1.31 halex 537: return (STATUS_MATCH);
1.1 millert 538: }
539:
1.39 gsoares 540: static void
1.1 millert 541: makelist(struct listhead *head, enum listtype type, char *src)
542: {
543: struct list *li;
544: struct stat st;
1.36 deraadt 545: char *sp, *p, buf[PATH_MAX];
1.40 millert 546: uid_t uid;
547: gid_t gid;
1.1 millert 548: int empty;
549:
550: empty = 1;
551:
552: while ((sp = strsep(&src, ",")) != NULL) {
553: if (*sp == '\0')
554: usage();
555:
556: if ((li = malloc(sizeof(*li))) == NULL)
557: errx(STATUS_ERROR, "memory allocation failure");
558: SLIST_INSERT_HEAD(head, li, li_chain);
559: empty = 0;
560:
1.21 markus 561: li->li_number = strtol(sp, &p, 0);
1.1 millert 562: if (*p == '\0') {
563: switch (type) {
564: case LT_PGRP:
565: if (li->li_number == 0)
566: li->li_number = getpgrp();
567: break;
568: case LT_SID:
569: if (li->li_number == 0)
570: li->li_number = getsid(mypid);
1.21 markus 571: break;
572: case LT_RTABLE:
573: if (li->li_number < 0 ||
574: li->li_number > RT_TABLEID_MAX)
575: errx(STATUS_BADUSAGE,
576: "rtable out of range");
1.1 millert 577: break;
578: case LT_TTY:
579: usage();
580: default:
581: break;
582: }
583: continue;
584: }
585:
586: switch (type) {
587: case LT_USER:
1.40 millert 588: if (uid_from_user(sp, &uid) == -1)
1.9 otto 589: errx(STATUS_BADUSAGE, "unknown user `%s'", sp);
1.40 millert 590: li->li_number = uid;
1.1 millert 591: break;
592: case LT_GROUP:
1.40 millert 593: if (gid_from_group(sp, &gid) == -1)
1.9 otto 594: errx(STATUS_BADUSAGE, "unknown group `%s'", sp);
1.40 millert 595: li->li_number = gid;
1.1 millert 596: break;
597: case LT_TTY:
598: if (strcmp(sp, "-") == 0) {
599: li->li_number = -1;
600: break;
601: } else if (strcmp(sp, "co") == 0)
602: p = "console";
603: else if (strncmp(sp, "tty", 3) == 0)
604: p = sp;
605: else
606: p = NULL;
607:
608: if (p == NULL)
609: snprintf(buf, sizeof(buf), "/dev/tty%s", sp);
610: else
611: snprintf(buf, sizeof(buf), "/dev/%s", p);
612:
1.41 deraadt 613: if (stat(buf, &st) == -1) {
1.1 millert 614: if (errno == ENOENT)
615: errx(STATUS_BADUSAGE,
616: "no such tty: `%s'", sp);
617: err(STATUS_ERROR, "stat(%s)", sp);
618: }
619:
1.15 otto 620: if (!S_ISCHR(st.st_mode))
1.1 millert 621: errx(STATUS_BADUSAGE, "not a tty: `%s'", sp);
622:
623: li->li_number = st.st_rdev;
624: break;
625: default:
626: usage();
1.3 deraadt 627: }
1.1 millert 628: }
629:
630: if (empty)
631: usage();
632: }