1 /* $NetBSD: pkill.c,v 1.16 2005/10/10 22:13:20 kleink Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 2002 The NetBSD Foundation, Inc. 7 * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Andrew Doran. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/types.h> 36 #include <sys/param.h> 37 #include <sys/sysctl.h> 38 #include <sys/proc.h> 39 #include <sys/queue.h> 40 #include <sys/stat.h> 41 #include <sys/time.h> 42 #include <sys/user.h> 43 44 #include <assert.h> 45 #include <stdbool.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <limits.h> 49 #include <paths.h> 50 #include <string.h> 51 #include <unistd.h> 52 #include <signal.h> 53 #include <regex.h> 54 #include <ctype.h> 55 #include <fcntl.h> 56 #include <kvm.h> 57 #include <err.h> 58 #include <pwd.h> 59 #include <grp.h> 60 #include <errno.h> 61 #include <locale.h> 62 #include <jail.h> 63 64 #define STATUS_MATCH 0 65 #define STATUS_NOMATCH 1 66 #define STATUS_BADUSAGE 2 67 #define STATUS_ERROR 3 68 69 #define MIN_PID 5 70 #define MAX_PID 99999 71 72 /* Ignore system-processes (if '-S' flag is not specified) and myself. */ 73 #define PSKIP(kp) ((kp)->ki_pid == mypid || \ 74 (!kthreads && ((kp)->ki_flag & P_KPROC) != 0)) 75 76 enum listtype { 77 LT_GENERIC, 78 LT_USER, 79 LT_GROUP, 80 LT_TTY, 81 LT_PGRP, 82 LT_JAIL, 83 LT_SID, 84 LT_CLASS 85 }; 86 87 struct list { 88 SLIST_ENTRY(list) li_chain; 89 long li_number; 90 char *li_name; 91 }; 92 93 SLIST_HEAD(listhead, list); 94 95 static struct kinfo_proc *plist; 96 static char *selected; 97 static const char *delim = "\n"; 98 static int nproc; 99 static int pgrep; 100 static int signum = SIGTERM; 101 static int newest; 102 static int oldest; 103 static int interactive; 104 static int inverse; 105 static int longfmt; 106 static int matchargs; 107 static int fullmatch; 108 static int kthreads; 109 static int cflags = REG_EXTENDED; 110 static int quiet; 111 static kvm_t *kd; 112 static pid_t mypid; 113 114 static struct listhead euidlist = SLIST_HEAD_INITIALIZER(euidlist); 115 static struct listhead ruidlist = SLIST_HEAD_INITIALIZER(ruidlist); 116 static struct listhead rgidlist = SLIST_HEAD_INITIALIZER(rgidlist); 117 static struct listhead pgrplist = SLIST_HEAD_INITIALIZER(pgrplist); 118 static struct listhead ppidlist = SLIST_HEAD_INITIALIZER(ppidlist); 119 static struct listhead tdevlist = SLIST_HEAD_INITIALIZER(tdevlist); 120 static struct listhead sidlist = SLIST_HEAD_INITIALIZER(sidlist); 121 static struct listhead jidlist = SLIST_HEAD_INITIALIZER(jidlist); 122 static struct listhead classlist = SLIST_HEAD_INITIALIZER(classlist); 123 124 static void usage(void) __attribute__((__noreturn__)); 125 static int killact(const struct kinfo_proc *); 126 static int grepact(const struct kinfo_proc *); 127 static void makelist(struct listhead *, enum listtype, char *); 128 static int takepid(const char *, int); 129 130 int 131 main(int argc, char **argv) 132 { 133 char *buf, *mstr, **pargv, *p, *q, *pidfile; 134 const char *execf, *coref; 135 size_t bufsz; 136 int ancestors, debug_opt, did_action; 137 int i, ch, bestidx, rv, criteria, pidfromfile, pidfilelock; 138 size_t jsz; 139 int (*action)(const struct kinfo_proc *); 140 struct kinfo_proc *kp; 141 struct list *li; 142 struct timeval best_tval; 143 regex_t reg; 144 regmatch_t regmatch; 145 pid_t pid; 146 147 setlocale(LC_ALL, ""); 148 149 if (strcmp(getprogname(), "pgrep") == 0) { 150 action = grepact; 151 pgrep = 1; 152 } else { 153 action = killact; 154 p = argv[1]; 155 156 if (argc > 1 && p[0] == '-') { 157 p++; 158 i = (int)strtol(p, &q, 10); 159 if (*q == '\0') { 160 signum = i; 161 argv++; 162 argc--; 163 } else { 164 if (strncasecmp(p, "SIG", 3) == 0) 165 p += 3; 166 for (i = 1; i < NSIG; i++) 167 if (strcasecmp(sys_signame[i], p) == 0) 168 break; 169 if (i != NSIG) { 170 signum = i; 171 argv++; 172 argc--; 173 } 174 } 175 } 176 } 177 178 buf = NULL; 179 ancestors = 0; 180 criteria = 0; 181 debug_opt = 0; 182 pidfile = NULL; 183 pidfilelock = 0; 184 quiet = 0; 185 execf = NULL; 186 coref = _PATH_DEVNULL; 187 188 while ((ch = getopt(argc, argv, "DF:G:ILM:N:P:SU:ac:d:fg:ij:lnoqs:t:u:vx")) != -1) 189 switch (ch) { 190 case 'D': 191 debug_opt++; 192 break; 193 case 'F': 194 pidfile = optarg; 195 criteria = 1; 196 break; 197 case 'G': 198 makelist(&rgidlist, LT_GROUP, optarg); 199 criteria = 1; 200 break; 201 case 'I': 202 if (pgrep) 203 usage(); 204 interactive = 1; 205 break; 206 case 'L': 207 pidfilelock = 1; 208 break; 209 case 'M': 210 coref = optarg; 211 break; 212 case 'N': 213 execf = optarg; 214 break; 215 case 'P': 216 makelist(&ppidlist, LT_GENERIC, optarg); 217 criteria = 1; 218 break; 219 case 'S': 220 if (!pgrep) 221 usage(); 222 kthreads = 1; 223 break; 224 case 'U': 225 makelist(&ruidlist, LT_USER, optarg); 226 criteria = 1; 227 break; 228 case 'a': 229 ancestors++; 230 break; 231 case 'c': 232 makelist(&classlist, LT_CLASS, optarg); 233 criteria = 1; 234 break; 235 case 'd': 236 if (!pgrep) 237 usage(); 238 delim = optarg; 239 break; 240 case 'f': 241 matchargs = 1; 242 break; 243 case 'g': 244 makelist(&pgrplist, LT_PGRP, optarg); 245 criteria = 1; 246 break; 247 case 'i': 248 cflags |= REG_ICASE; 249 break; 250 case 'j': 251 makelist(&jidlist, LT_JAIL, optarg); 252 criteria = 1; 253 break; 254 case 'l': 255 longfmt = 1; 256 break; 257 case 'n': 258 newest = 1; 259 criteria = 1; 260 break; 261 case 'o': 262 oldest = 1; 263 criteria = 1; 264 break; 265 case 'q': 266 if (!pgrep) 267 usage(); 268 quiet = 1; 269 break; 270 case 's': 271 makelist(&sidlist, LT_SID, optarg); 272 criteria = 1; 273 break; 274 case 't': 275 makelist(&tdevlist, LT_TTY, optarg); 276 criteria = 1; 277 break; 278 case 'u': 279 makelist(&euidlist, LT_USER, optarg); 280 criteria = 1; 281 break; 282 case 'v': 283 inverse = 1; 284 break; 285 case 'x': 286 fullmatch = 1; 287 break; 288 default: 289 usage(); 290 /* NOTREACHED */ 291 } 292 293 argc -= optind; 294 argv += optind; 295 if (argc != 0) 296 criteria = 1; 297 if (!criteria) 298 usage(); 299 if (newest && oldest) 300 errx(STATUS_ERROR, "Options -n and -o are mutually exclusive"); 301 if (pidfile != NULL) 302 pidfromfile = takepid(pidfile, pidfilelock); 303 else { 304 if (pidfilelock) { 305 errx(STATUS_ERROR, 306 "Option -L doesn't make sense without -F"); 307 } 308 pidfromfile = -1; 309 } 310 311 mypid = getpid(); 312 313 /* 314 * If we're not matching args, we only need a buffer large enough to 315 * hold some relatively short error strings. Otherwise, we have to 316 * assume we'll need up to ARG_MAX bytes for arguments. 317 */ 318 bufsz = _POSIX2_LINE_MAX; 319 if (matchargs) { 320 long arg_max; 321 322 arg_max = sysconf(_SC_ARG_MAX); 323 if (arg_max == -1) 324 arg_max = ARG_MAX; 325 326 /* 327 * The absolute worst case scenario is ARG_MAX single-byte 328 * arguments which we'll then separate with spaces and NUL 329 * terminate. 330 */ 331 bufsz = (arg_max * 2) + 1; 332 } 333 334 buf = malloc(bufsz); 335 if (buf == NULL) 336 err(STATUS_ERROR, "malloc"); 337 338 /* 339 * Retrieve the list of running processes from the kernel. 340 */ 341 kd = kvm_openfiles(execf, coref, NULL, O_RDONLY, buf); 342 if (kd == NULL) 343 errx(STATUS_ERROR, "Cannot open kernel files (%s)", buf); 344 345 /* 346 * Use KERN_PROC_PROC instead of KERN_PROC_ALL, since we 347 * just want processes and not individual kernel threads. 348 */ 349 if (pidfromfile >= 0) 350 plist = kvm_getprocs(kd, KERN_PROC_PID, pidfromfile, &nproc); 351 else 352 plist = kvm_getprocs(kd, KERN_PROC_PROC, 0, &nproc); 353 if (plist == NULL) { 354 errx(STATUS_ERROR, "Cannot get process list (%s)", 355 kvm_geterr(kd)); 356 } 357 358 /* 359 * Allocate memory which will be used to keep track of the 360 * selection. 361 */ 362 if ((selected = malloc(nproc)) == NULL) { 363 err(STATUS_ERROR, "Cannot allocate memory for %d processes", 364 nproc); 365 } 366 memset(selected, 0, nproc); 367 368 /* 369 * Refine the selection. 370 */ 371 for (; *argv != NULL; argv++) { 372 if ((rv = regcomp(®, *argv, cflags)) != 0) { 373 regerror(rv, ®, buf, bufsz); 374 errx(STATUS_BADUSAGE, 375 "Cannot compile regular expression `%s' (%s)", 376 *argv, buf); 377 } 378 379 for (i = 0, kp = plist; i < nproc; i++, kp++) { 380 if (PSKIP(kp)) { 381 if (debug_opt > 0) 382 fprintf(stderr, "* Skipped %5d %3d %s\n", 383 kp->ki_pid, kp->ki_uid, kp->ki_comm); 384 continue; 385 } 386 387 if (matchargs && 388 (pargv = kvm_getargv(kd, kp, 0)) != NULL) { 389 jsz = 0; 390 while (jsz < bufsz && *pargv != NULL) { 391 jsz += snprintf(buf + jsz, 392 bufsz - jsz, 393 pargv[1] != NULL ? "%s " : "%s", 394 pargv[0]); 395 pargv++; 396 } 397 mstr = buf; 398 } else 399 mstr = kp->ki_comm; 400 401 rv = regexec(®, mstr, 1, ®match, 0); 402 if (rv == 0) { 403 if (fullmatch) { 404 if (regmatch.rm_so == 0 && 405 regmatch.rm_eo == 406 (off_t)strlen(mstr)) 407 selected[i] = 1; 408 } else 409 selected[i] = 1; 410 } else if (rv != REG_NOMATCH) { 411 regerror(rv, ®, buf, bufsz); 412 errx(STATUS_ERROR, 413 "Regular expression evaluation error (%s)", 414 buf); 415 } 416 if (debug_opt > 1) { 417 const char *rv_res = "NoMatch"; 418 if (selected[i]) 419 rv_res = "Matched"; 420 fprintf(stderr, "* %s %5d %3d %s\n", rv_res, 421 kp->ki_pid, kp->ki_uid, mstr); 422 } 423 } 424 425 regfree(®); 426 } 427 428 for (i = 0, kp = plist; i < nproc; i++, kp++) { 429 if (PSKIP(kp)) 430 continue; 431 432 if (pidfromfile >= 0 && kp->ki_pid != pidfromfile) { 433 selected[i] = 0; 434 continue; 435 } 436 437 SLIST_FOREACH(li, &ruidlist, li_chain) 438 if (kp->ki_ruid == (uid_t)li->li_number) 439 break; 440 if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) { 441 selected[i] = 0; 442 continue; 443 } 444 445 SLIST_FOREACH(li, &rgidlist, li_chain) 446 if (kp->ki_rgid == (gid_t)li->li_number) 447 break; 448 if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) { 449 selected[i] = 0; 450 continue; 451 } 452 453 SLIST_FOREACH(li, &euidlist, li_chain) 454 if (kp->ki_uid == (uid_t)li->li_number) 455 break; 456 if (SLIST_FIRST(&euidlist) != NULL && li == NULL) { 457 selected[i] = 0; 458 continue; 459 } 460 461 SLIST_FOREACH(li, &ppidlist, li_chain) 462 if (kp->ki_ppid == (pid_t)li->li_number) 463 break; 464 if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) { 465 selected[i] = 0; 466 continue; 467 } 468 469 SLIST_FOREACH(li, &pgrplist, li_chain) 470 if (kp->ki_pgid == (pid_t)li->li_number) 471 break; 472 if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) { 473 selected[i] = 0; 474 continue; 475 } 476 477 SLIST_FOREACH(li, &tdevlist, li_chain) { 478 if (li->li_number == -1 && 479 (kp->ki_flag & P_CONTROLT) == 0) 480 break; 481 if (kp->ki_tdev == (dev_t)li->li_number) 482 break; 483 } 484 if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) { 485 selected[i] = 0; 486 continue; 487 } 488 489 SLIST_FOREACH(li, &sidlist, li_chain) 490 if (kp->ki_sid == (pid_t)li->li_number) 491 break; 492 if (SLIST_FIRST(&sidlist) != NULL && li == NULL) { 493 selected[i] = 0; 494 continue; 495 } 496 497 SLIST_FOREACH(li, &jidlist, li_chain) { 498 /* A particular jail ID, including 0 (not in jail) */ 499 if (kp->ki_jid == (int)li->li_number) 500 break; 501 /* Any jail */ 502 if (kp->ki_jid > 0 && li->li_number == -1) 503 break; 504 } 505 if (SLIST_FIRST(&jidlist) != NULL && li == NULL) { 506 selected[i] = 0; 507 continue; 508 } 509 510 SLIST_FOREACH(li, &classlist, li_chain) { 511 /* 512 * We skip P_SYSTEM processes to match ps(1) output. 513 */ 514 if ((kp->ki_flag & P_SYSTEM) == 0 && 515 strcmp(kp->ki_loginclass, li->li_name) == 0) 516 break; 517 } 518 if (SLIST_FIRST(&classlist) != NULL && li == NULL) { 519 selected[i] = 0; 520 continue; 521 } 522 523 if (argc == 0) 524 selected[i] = 1; 525 } 526 527 if (!ancestors) { 528 pid = mypid; 529 while (pid) { 530 for (i = 0, kp = plist; i < nproc; i++, kp++) { 531 if (PSKIP(kp)) 532 continue; 533 if (kp->ki_pid == pid) { 534 selected[i] = 0; 535 pid = kp->ki_ppid; 536 break; 537 } 538 } 539 if (i == nproc) { 540 if (pid == mypid) 541 pid = getppid(); 542 else 543 break; /* Maybe we're in a jail ? */ 544 } 545 } 546 } 547 548 if (newest || oldest) { 549 best_tval.tv_sec = 0; 550 best_tval.tv_usec = 0; 551 bestidx = -1; 552 553 for (i = 0, kp = plist; i < nproc; i++, kp++) { 554 if (!selected[i]) 555 continue; 556 if (bestidx == -1) { 557 /* The first entry of the list which matched. */ 558 ; 559 } else if (timercmp(&kp->ki_start, &best_tval, >)) { 560 /* This entry is newer than previous "best". */ 561 if (oldest) /* but we want the oldest */ 562 continue; 563 } else { 564 /* This entry is older than previous "best". */ 565 if (newest) /* but we want the newest */ 566 continue; 567 } 568 /* This entry is better than previous "best" entry. */ 569 best_tval.tv_sec = kp->ki_start.tv_sec; 570 best_tval.tv_usec = kp->ki_start.tv_usec; 571 bestidx = i; 572 } 573 574 memset(selected, 0, nproc); 575 if (bestidx != -1) 576 selected[bestidx] = 1; 577 } 578 579 /* 580 * Take the appropriate action for each matched process, if any. 581 */ 582 did_action = 0; 583 for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) { 584 if (PSKIP(kp)) 585 continue; 586 if (selected[i]) { 587 if (longfmt && !pgrep) { 588 did_action = 1; 589 printf("kill -%d %d\n", signum, kp->ki_pid); 590 } 591 if (inverse) 592 continue; 593 } else if (!inverse) 594 continue; 595 rv |= (*action)(kp); 596 } 597 if (rv && pgrep && !quiet) 598 putchar('\n'); 599 if (!did_action && !pgrep && longfmt) 600 fprintf(stderr, 601 "No matching processes belonging to you were found\n"); 602 603 free(buf); 604 exit(rv ? STATUS_MATCH : STATUS_NOMATCH); 605 } 606 607 static void 608 usage(void) 609 { 610 const char *ustr; 611 612 if (pgrep) 613 ustr = "[-LSfilnoqvx] [-d delim]"; 614 else 615 ustr = "[-signal] [-ILfilnovx]"; 616 617 fprintf(stderr, 618 "usage: %s %s [-F pidfile] [-G gid] [-M core] [-N system]\n" 619 " [-P ppid] [-U uid] [-c class] [-g pgrp] [-j jail]\n" 620 " [-s sid] [-t tty] [-u euid] pattern ...\n", 621 getprogname(), ustr); 622 623 exit(STATUS_BADUSAGE); 624 } 625 626 static void 627 show_process(const struct kinfo_proc *kp) 628 { 629 char **argv; 630 631 if (quiet) { 632 assert(pgrep); 633 return; 634 } 635 if ((longfmt || !pgrep) && matchargs && 636 (argv = kvm_getargv(kd, kp, 0)) != NULL) { 637 printf("%d ", (int)kp->ki_pid); 638 for (; *argv != NULL; argv++) { 639 printf("%s", *argv); 640 if (argv[1] != NULL) 641 putchar(' '); 642 } 643 } else if (longfmt || !pgrep) 644 printf("%d %s", (int)kp->ki_pid, kp->ki_comm); 645 else 646 printf("%d", (int)kp->ki_pid); 647 } 648 649 static int 650 killact(const struct kinfo_proc *kp) 651 { 652 int ch, first; 653 654 if (interactive) { 655 /* 656 * Be careful, ask before killing. 657 */ 658 printf("kill "); 659 show_process(kp); 660 printf("? "); 661 fflush(stdout); 662 first = ch = getchar(); 663 while (ch != '\n' && ch != EOF) 664 ch = getchar(); 665 if (first != 'y' && first != 'Y') 666 return (1); 667 } 668 if (kill(kp->ki_pid, signum) == -1) { 669 /* 670 * Check for ESRCH, which indicates that the process 671 * disappeared between us matching it and us 672 * signalling it; don't issue a warning about it. 673 */ 674 if (errno != ESRCH) 675 warn("signalling pid %d", (int)kp->ki_pid); 676 /* 677 * Return 0 to indicate that the process should not be 678 * considered a match, since we didn't actually get to 679 * signal it. 680 */ 681 return (0); 682 } 683 return (1); 684 } 685 686 static int 687 grepact(const struct kinfo_proc *kp) 688 { 689 static bool first = true; 690 691 if (!quiet && !first) 692 printf("%s", delim); 693 show_process(kp); 694 first = false; 695 return (1); 696 } 697 698 static void 699 makelist(struct listhead *head, enum listtype type, char *src) 700 { 701 struct list *li; 702 struct passwd *pw; 703 struct group *gr; 704 struct stat st; 705 const char *cp; 706 char *sp, *ep, buf[MAXPATHLEN]; 707 int empty; 708 709 empty = 1; 710 711 while ((sp = strsep(&src, ",")) != NULL) { 712 if (*sp == '\0') 713 usage(); 714 715 if ((li = malloc(sizeof(*li))) == NULL) { 716 err(STATUS_ERROR, "Cannot allocate %zu bytes", 717 sizeof(*li)); 718 } 719 720 SLIST_INSERT_HEAD(head, li, li_chain); 721 empty = 0; 722 723 if (type != LT_CLASS) 724 li->li_number = (uid_t)strtol(sp, &ep, 0); 725 726 if (type != LT_CLASS && *ep == '\0') { 727 switch (type) { 728 case LT_PGRP: 729 if (li->li_number == 0) 730 li->li_number = getpgrp(); 731 break; 732 case LT_SID: 733 if (li->li_number == 0) 734 li->li_number = getsid(mypid); 735 break; 736 case LT_JAIL: 737 if (li->li_number < 0) 738 errx(STATUS_BADUSAGE, 739 "Negative jail ID `%s'", sp); 740 /* For compatibility with old -j */ 741 if (li->li_number == 0) 742 li->li_number = -1; /* any jail */ 743 break; 744 case LT_TTY: 745 if (li->li_number < 0) 746 errx(STATUS_BADUSAGE, 747 "Negative /dev/pts tty `%s'", sp); 748 snprintf(buf, sizeof(buf), _PATH_DEV "pts/%s", 749 sp); 750 if (stat(buf, &st) != -1) 751 goto foundtty; 752 if (errno == ENOENT) 753 errx(STATUS_BADUSAGE, "No such tty: `" 754 _PATH_DEV "pts/%s'", sp); 755 err(STATUS_ERROR, "Cannot access `" 756 _PATH_DEV "pts/%s'", sp); 757 break; 758 default: 759 break; 760 } 761 continue; 762 } 763 764 switch (type) { 765 case LT_USER: 766 if ((pw = getpwnam(sp)) == NULL) 767 errx(STATUS_BADUSAGE, "Unknown user `%s'", sp); 768 li->li_number = pw->pw_uid; 769 break; 770 case LT_GROUP: 771 if ((gr = getgrnam(sp)) == NULL) 772 errx(STATUS_BADUSAGE, "Unknown group `%s'", sp); 773 li->li_number = gr->gr_gid; 774 break; 775 case LT_TTY: 776 if (strcmp(sp, "-") == 0) { 777 li->li_number = -1; 778 break; 779 } else if (strcmp(sp, "co") == 0) { 780 cp = "console"; 781 } else { 782 cp = sp; 783 } 784 785 snprintf(buf, sizeof(buf), _PATH_DEV "%s", cp); 786 if (stat(buf, &st) != -1) 787 goto foundtty; 788 789 snprintf(buf, sizeof(buf), _PATH_DEV "tty%s", cp); 790 if (stat(buf, &st) != -1) 791 goto foundtty; 792 793 if (errno == ENOENT) 794 errx(STATUS_BADUSAGE, "No such tty: `%s'", sp); 795 err(STATUS_ERROR, "Cannot access `%s'", sp); 796 797 foundtty: if ((st.st_mode & S_IFCHR) == 0) 798 errx(STATUS_BADUSAGE, "Not a tty: `%s'", sp); 799 800 li->li_number = st.st_rdev; 801 break; 802 case LT_JAIL: { 803 int jid; 804 805 if (strcmp(sp, "none") == 0) 806 li->li_number = 0; 807 else if (strcmp(sp, "any") == 0) 808 li->li_number = -1; 809 else if ((jid = jail_getid(sp)) != -1) 810 li->li_number = jid; 811 else if (*ep != '\0') 812 errx(STATUS_BADUSAGE, 813 "Invalid jail ID or name `%s'", sp); 814 break; 815 } 816 case LT_CLASS: 817 li->li_number = -1; 818 li->li_name = strdup(sp); 819 if (li->li_name == NULL) 820 err(STATUS_ERROR, "Cannot allocate memory"); 821 break; 822 default: 823 usage(); 824 } 825 } 826 827 if (empty) 828 usage(); 829 } 830 831 static int 832 takepid(const char *pidfile, int pidfilelock) 833 { 834 char *endp, line[BUFSIZ]; 835 FILE *fh; 836 long rval; 837 838 fh = fopen(pidfile, "r"); 839 if (fh == NULL) 840 err(STATUS_ERROR, "Cannot open pidfile `%s'", pidfile); 841 842 if (pidfilelock) { 843 /* 844 * If we can lock pidfile, this means that daemon is not 845 * running, so would be better not to kill some random process. 846 */ 847 if (flock(fileno(fh), LOCK_EX | LOCK_NB) == 0) { 848 (void)fclose(fh); 849 errx(STATUS_ERROR, "File '%s' can be locked", pidfile); 850 } else { 851 if (errno != EWOULDBLOCK) { 852 errx(STATUS_ERROR, 853 "Error while locking file '%s'", pidfile); 854 } 855 } 856 } 857 858 if (fgets(line, sizeof(line), fh) == NULL) { 859 if (feof(fh)) { 860 (void)fclose(fh); 861 errx(STATUS_ERROR, "Pidfile `%s' is empty", pidfile); 862 } 863 (void)fclose(fh); 864 err(STATUS_ERROR, "Cannot read from pid file `%s'", pidfile); 865 } 866 (void)fclose(fh); 867 868 rval = strtol(line, &endp, 10); 869 if (*endp != '\0' && !isspace((unsigned char)*endp)) 870 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile); 871 else if (rval < MIN_PID || rval > MAX_PID) 872 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile); 873 return (rval); 874 } 875