1 /* $NetBSD: pkill.c,v 1.16 2005/10/10 22:13:20 kleink Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 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/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/types.h> 37 #include <sys/param.h> 38 #include <sys/sysctl.h> 39 #include <sys/proc.h> 40 #include <sys/queue.h> 41 #include <sys/stat.h> 42 #include <sys/time.h> 43 #include <sys/user.h> 44 45 #include <assert.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 63 #define STATUS_MATCH 0 64 #define STATUS_NOMATCH 1 65 #define STATUS_BADUSAGE 2 66 #define STATUS_ERROR 3 67 68 #define MIN_PID 5 69 #define MAX_PID 99999 70 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)) 74 75 enum listtype { 76 LT_GENERIC, 77 LT_USER, 78 LT_GROUP, 79 LT_TTY, 80 LT_PGRP, 81 LT_JID, 82 LT_SID, 83 LT_CLASS 84 }; 85 86 struct list { 87 SLIST_ENTRY(list) li_chain; 88 long li_number; 89 char *li_name; 90 }; 91 92 SLIST_HEAD(listhead, list); 93 94 static struct kinfo_proc *plist; 95 static char *selected; 96 static const char *delim = "\n"; 97 static int nproc; 98 static int pgrep; 99 static int signum = SIGTERM; 100 static int newest; 101 static int oldest; 102 static int interactive; 103 static int inverse; 104 static int longfmt; 105 static int matchargs; 106 static int fullmatch; 107 static int kthreads; 108 static int cflags = REG_EXTENDED; 109 static int quiet; 110 static kvm_t *kd; 111 static pid_t mypid; 112 113 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); 122 123 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); 128 129 int 130 main(int argc, char **argv) 131 { 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; 136 size_t jsz; 137 int (*action)(const struct kinfo_proc *); 138 struct kinfo_proc *kp; 139 struct list *li; 140 struct timeval best_tval; 141 regex_t reg; 142 regmatch_t regmatch; 143 pid_t pid; 144 145 setlocale(LC_ALL, ""); 146 147 if (strcmp(getprogname(), "pgrep") == 0) { 148 action = grepact; 149 pgrep = 1; 150 } else { 151 action = killact; 152 p = argv[1]; 153 154 if (argc > 1 && p[0] == '-') { 155 p++; 156 i = (int)strtol(p, &q, 10); 157 if (*q == '\0') { 158 signum = i; 159 argv++; 160 argc--; 161 } else { 162 if (strncasecmp(p, "SIG", 3) == 0) 163 p += 3; 164 for (i = 1; i < NSIG; i++) 165 if (strcasecmp(sys_signame[i], p) == 0) 166 break; 167 if (i != NSIG) { 168 signum = i; 169 argv++; 170 argc--; 171 } 172 } 173 } 174 } 175 176 ancestors = 0; 177 criteria = 0; 178 debug_opt = 0; 179 pidfile = NULL; 180 pidfilelock = 0; 181 quiet = 0; 182 execf = NULL; 183 coref = _PATH_DEVNULL; 184 185 while ((ch = getopt(argc, argv, "DF:G:ILM:N:P:SU:ac:d:fg:ij:lnoqs:t:u:vx")) != -1) 186 switch (ch) { 187 case 'D': 188 debug_opt++; 189 break; 190 case 'F': 191 pidfile = optarg; 192 criteria = 1; 193 break; 194 case 'G': 195 makelist(&rgidlist, LT_GROUP, optarg); 196 criteria = 1; 197 break; 198 case 'I': 199 if (pgrep) 200 usage(); 201 interactive = 1; 202 break; 203 case 'L': 204 pidfilelock = 1; 205 break; 206 case 'M': 207 coref = optarg; 208 break; 209 case 'N': 210 execf = optarg; 211 break; 212 case 'P': 213 makelist(&ppidlist, LT_GENERIC, optarg); 214 criteria = 1; 215 break; 216 case 'S': 217 if (!pgrep) 218 usage(); 219 kthreads = 1; 220 break; 221 case 'U': 222 makelist(&ruidlist, LT_USER, optarg); 223 criteria = 1; 224 break; 225 case 'a': 226 ancestors++; 227 break; 228 case 'c': 229 makelist(&classlist, LT_CLASS, optarg); 230 criteria = 1; 231 break; 232 case 'd': 233 if (!pgrep) 234 usage(); 235 delim = optarg; 236 break; 237 case 'f': 238 matchargs = 1; 239 break; 240 case 'g': 241 makelist(&pgrplist, LT_PGRP, optarg); 242 criteria = 1; 243 break; 244 case 'i': 245 cflags |= REG_ICASE; 246 break; 247 case 'j': 248 makelist(&jidlist, LT_JID, optarg); 249 criteria = 1; 250 break; 251 case 'l': 252 longfmt = 1; 253 break; 254 case 'n': 255 newest = 1; 256 criteria = 1; 257 break; 258 case 'o': 259 oldest = 1; 260 criteria = 1; 261 break; 262 case 'q': 263 if (!pgrep) 264 usage(); 265 quiet = 1; 266 break; 267 case 's': 268 makelist(&sidlist, LT_SID, optarg); 269 criteria = 1; 270 break; 271 case 't': 272 makelist(&tdevlist, LT_TTY, optarg); 273 criteria = 1; 274 break; 275 case 'u': 276 makelist(&euidlist, LT_USER, optarg); 277 criteria = 1; 278 break; 279 case 'v': 280 inverse = 1; 281 break; 282 case 'x': 283 fullmatch = 1; 284 break; 285 default: 286 usage(); 287 /* NOTREACHED */ 288 } 289 290 argc -= optind; 291 argv += optind; 292 if (argc != 0) 293 criteria = 1; 294 if (!criteria) 295 usage(); 296 if (newest && oldest) 297 errx(STATUS_ERROR, "Options -n and -o are mutually exclusive"); 298 if (pidfile != NULL) 299 pidfromfile = takepid(pidfile, pidfilelock); 300 else { 301 if (pidfilelock) { 302 errx(STATUS_ERROR, 303 "Option -L doesn't make sense without -F"); 304 } 305 pidfromfile = -1; 306 } 307 308 mypid = getpid(); 309 310 /* 311 * Retrieve the list of running processes from the kernel. 312 */ 313 kd = kvm_openfiles(execf, coref, NULL, O_RDONLY, buf); 314 if (kd == NULL) 315 errx(STATUS_ERROR, "Cannot open kernel files (%s)", buf); 316 317 /* 318 * Use KERN_PROC_PROC instead of KERN_PROC_ALL, since we 319 * just want processes and not individual kernel threads. 320 */ 321 plist = kvm_getprocs(kd, KERN_PROC_PROC, 0, &nproc); 322 if (plist == NULL) { 323 errx(STATUS_ERROR, "Cannot get process list (%s)", 324 kvm_geterr(kd)); 325 } 326 327 /* 328 * Allocate memory which will be used to keep track of the 329 * selection. 330 */ 331 if ((selected = malloc(nproc)) == NULL) { 332 err(STATUS_ERROR, "Cannot allocate memory for %d processes", 333 nproc); 334 } 335 memset(selected, 0, nproc); 336 337 /* 338 * Refine the selection. 339 */ 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)", 345 *argv, buf); 346 } 347 348 for (i = 0, kp = plist; i < nproc; i++, kp++) { 349 if (PSKIP(kp)) { 350 if (debug_opt > 0) 351 fprintf(stderr, "* Skipped %5d %3d %s\n", 352 kp->ki_pid, kp->ki_uid, kp->ki_comm); 353 continue; 354 } 355 356 if (matchargs && 357 (pargv = kvm_getargv(kd, kp, 0)) != NULL) { 358 jsz = 0; 359 while (jsz < sizeof(buf) && *pargv != NULL) { 360 jsz += snprintf(buf + jsz, 361 sizeof(buf) - jsz, 362 pargv[1] != NULL ? "%s " : "%s", 363 pargv[0]); 364 pargv++; 365 } 366 mstr = buf; 367 } else 368 mstr = kp->ki_comm; 369 370 rv = regexec(®, mstr, 1, ®match, 0); 371 if (rv == 0) { 372 if (fullmatch) { 373 if (regmatch.rm_so == 0 && 374 regmatch.rm_eo == 375 (off_t)strlen(mstr)) 376 selected[i] = 1; 377 } else 378 selected[i] = 1; 379 } else if (rv != REG_NOMATCH) { 380 regerror(rv, ®, buf, sizeof(buf)); 381 errx(STATUS_ERROR, 382 "Regular expression evaluation error (%s)", 383 buf); 384 } 385 if (debug_opt > 1) { 386 const char *rv_res = "NoMatch"; 387 if (selected[i]) 388 rv_res = "Matched"; 389 fprintf(stderr, "* %s %5d %3d %s\n", rv_res, 390 kp->ki_pid, kp->ki_uid, mstr); 391 } 392 } 393 394 regfree(®); 395 } 396 397 for (i = 0, kp = plist; i < nproc; i++, kp++) { 398 if (PSKIP(kp)) 399 continue; 400 401 if (pidfromfile >= 0 && kp->ki_pid != pidfromfile) { 402 selected[i] = 0; 403 continue; 404 } 405 406 SLIST_FOREACH(li, &ruidlist, li_chain) 407 if (kp->ki_ruid == (uid_t)li->li_number) 408 break; 409 if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) { 410 selected[i] = 0; 411 continue; 412 } 413 414 SLIST_FOREACH(li, &rgidlist, li_chain) 415 if (kp->ki_rgid == (gid_t)li->li_number) 416 break; 417 if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) { 418 selected[i] = 0; 419 continue; 420 } 421 422 SLIST_FOREACH(li, &euidlist, li_chain) 423 if (kp->ki_uid == (uid_t)li->li_number) 424 break; 425 if (SLIST_FIRST(&euidlist) != NULL && li == NULL) { 426 selected[i] = 0; 427 continue; 428 } 429 430 SLIST_FOREACH(li, &ppidlist, li_chain) 431 if (kp->ki_ppid == (pid_t)li->li_number) 432 break; 433 if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) { 434 selected[i] = 0; 435 continue; 436 } 437 438 SLIST_FOREACH(li, &pgrplist, li_chain) 439 if (kp->ki_pgid == (pid_t)li->li_number) 440 break; 441 if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) { 442 selected[i] = 0; 443 continue; 444 } 445 446 SLIST_FOREACH(li, &tdevlist, li_chain) { 447 if (li->li_number == -1 && 448 (kp->ki_flag & P_CONTROLT) == 0) 449 break; 450 if (kp->ki_tdev == (dev_t)li->li_number) 451 break; 452 } 453 if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) { 454 selected[i] = 0; 455 continue; 456 } 457 458 SLIST_FOREACH(li, &sidlist, li_chain) 459 if (kp->ki_sid == (pid_t)li->li_number) 460 break; 461 if (SLIST_FIRST(&sidlist) != NULL && li == NULL) { 462 selected[i] = 0; 463 continue; 464 } 465 466 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) 469 break; 470 /* Any jail */ 471 if (kp->ki_jid > 0 && li->li_number == -1) 472 break; 473 } 474 if (SLIST_FIRST(&jidlist) != NULL && li == NULL) { 475 selected[i] = 0; 476 continue; 477 } 478 479 SLIST_FOREACH(li, &classlist, li_chain) { 480 /* 481 * We skip P_SYSTEM processes to match ps(1) output. 482 */ 483 if ((kp->ki_flag & P_SYSTEM) == 0 && 484 strcmp(kp->ki_loginclass, li->li_name) == 0) 485 break; 486 } 487 if (SLIST_FIRST(&classlist) != NULL && li == NULL) { 488 selected[i] = 0; 489 continue; 490 } 491 492 if (argc == 0) 493 selected[i] = 1; 494 } 495 496 if (!ancestors) { 497 pid = mypid; 498 while (pid) { 499 for (i = 0, kp = plist; i < nproc; i++, kp++) { 500 if (PSKIP(kp)) 501 continue; 502 if (kp->ki_pid == pid) { 503 selected[i] = 0; 504 pid = kp->ki_ppid; 505 break; 506 } 507 } 508 if (i == nproc) { 509 if (pid == mypid) 510 pid = getppid(); 511 else 512 break; /* Maybe we're in a jail ? */ 513 } 514 } 515 } 516 517 if (newest || oldest) { 518 best_tval.tv_sec = 0; 519 best_tval.tv_usec = 0; 520 bestidx = -1; 521 522 for (i = 0, kp = plist; i < nproc; i++, kp++) { 523 if (!selected[i]) 524 continue; 525 if (bestidx == -1) { 526 /* The first entry of the list which matched. */ 527 ; 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 */ 531 continue; 532 } else { 533 /* This entry is older than previous "best". */ 534 if (newest) /* but we want the newest */ 535 continue; 536 } 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; 540 bestidx = i; 541 } 542 543 memset(selected, 0, nproc); 544 if (bestidx != -1) 545 selected[bestidx] = 1; 546 } 547 548 /* 549 * Take the appropriate action for each matched process, if any. 550 */ 551 did_action = 0; 552 for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) { 553 if (PSKIP(kp)) 554 continue; 555 if (selected[i]) { 556 if (longfmt && !pgrep) { 557 did_action = 1; 558 printf("kill -%d %d\n", signum, kp->ki_pid); 559 } 560 if (inverse) 561 continue; 562 } else if (!inverse) 563 continue; 564 rv |= (*action)(kp); 565 } 566 if (!did_action && !pgrep && longfmt) 567 fprintf(stderr, 568 "No matching processes belonging to you were found\n"); 569 570 exit(rv ? STATUS_MATCH : STATUS_NOMATCH); 571 } 572 573 static void 574 usage(void) 575 { 576 const char *ustr; 577 578 if (pgrep) 579 ustr = "[-LSfilnoqvx] [-d delim]"; 580 else 581 ustr = "[-signal] [-ILfilnovx]"; 582 583 fprintf(stderr, 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); 588 589 exit(STATUS_BADUSAGE); 590 } 591 592 static void 593 show_process(const struct kinfo_proc *kp) 594 { 595 char **argv; 596 597 if (quiet) { 598 assert(pgrep); 599 return; 600 } 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++) { 605 printf("%s", *argv); 606 if (argv[1] != NULL) 607 putchar(' '); 608 } 609 } else if (longfmt || !pgrep) 610 printf("%d %s", (int)kp->ki_pid, kp->ki_comm); 611 else 612 printf("%d", (int)kp->ki_pid); 613 } 614 615 static int 616 killact(const struct kinfo_proc *kp) 617 { 618 int ch, first; 619 620 if (interactive) { 621 /* 622 * Be careful, ask before killing. 623 */ 624 printf("kill "); 625 show_process(kp); 626 printf("? "); 627 fflush(stdout); 628 first = ch = getchar(); 629 while (ch != '\n' && ch != EOF) 630 ch = getchar(); 631 if (first != 'y' && first != 'Y') 632 return (1); 633 } 634 if (kill(kp->ki_pid, signum) == -1) { 635 /* 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. 639 */ 640 if (errno != ESRCH) 641 warn("signalling pid %d", (int)kp->ki_pid); 642 /* 643 * Return 0 to indicate that the process should not be 644 * considered a match, since we didn't actually get to 645 * signal it. 646 */ 647 return (0); 648 } 649 return (1); 650 } 651 652 static int 653 grepact(const struct kinfo_proc *kp) 654 { 655 656 show_process(kp); 657 if (!quiet) 658 printf("%s", delim); 659 return (1); 660 } 661 662 static void 663 makelist(struct listhead *head, enum listtype type, char *src) 664 { 665 struct list *li; 666 struct passwd *pw; 667 struct group *gr; 668 struct stat st; 669 const char *cp; 670 char *sp, *ep, buf[MAXPATHLEN]; 671 int empty; 672 673 empty = 1; 674 675 while ((sp = strsep(&src, ",")) != NULL) { 676 if (*sp == '\0') 677 usage(); 678 679 if ((li = malloc(sizeof(*li))) == NULL) { 680 err(STATUS_ERROR, "Cannot allocate %zu bytes", 681 sizeof(*li)); 682 } 683 684 SLIST_INSERT_HEAD(head, li, li_chain); 685 empty = 0; 686 687 if (type != LT_CLASS) 688 li->li_number = (uid_t)strtol(sp, &ep, 0); 689 690 if (type != LT_CLASS && *ep == '\0') { 691 switch (type) { 692 case LT_PGRP: 693 if (li->li_number == 0) 694 li->li_number = getpgrp(); 695 break; 696 case LT_SID: 697 if (li->li_number == 0) 698 li->li_number = getsid(mypid); 699 break; 700 case LT_JID: 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 */ 707 break; 708 case LT_TTY: 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", 713 sp); 714 if (stat(buf, &st) != -1) 715 goto foundtty; 716 if (errno == ENOENT) 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); 721 break; 722 default: 723 break; 724 } 725 continue; 726 } 727 728 switch (type) { 729 case LT_USER: 730 if ((pw = getpwnam(sp)) == NULL) 731 errx(STATUS_BADUSAGE, "Unknown user `%s'", sp); 732 li->li_number = pw->pw_uid; 733 break; 734 case LT_GROUP: 735 if ((gr = getgrnam(sp)) == NULL) 736 errx(STATUS_BADUSAGE, "Unknown group `%s'", sp); 737 li->li_number = gr->gr_gid; 738 break; 739 case LT_TTY: 740 if (strcmp(sp, "-") == 0) { 741 li->li_number = -1; 742 break; 743 } else if (strcmp(sp, "co") == 0) { 744 cp = "console"; 745 } else { 746 cp = sp; 747 } 748 749 snprintf(buf, sizeof(buf), _PATH_DEV "%s", cp); 750 if (stat(buf, &st) != -1) 751 goto foundtty; 752 753 snprintf(buf, sizeof(buf), _PATH_DEV "tty%s", cp); 754 if (stat(buf, &st) != -1) 755 goto foundtty; 756 757 if (errno == ENOENT) 758 errx(STATUS_BADUSAGE, "No such tty: `%s'", sp); 759 err(STATUS_ERROR, "Cannot access `%s'", sp); 760 761 foundtty: if ((st.st_mode & S_IFCHR) == 0) 762 errx(STATUS_BADUSAGE, "Not a tty: `%s'", sp); 763 764 li->li_number = st.st_rdev; 765 break; 766 case LT_JID: 767 if (strcmp(sp, "none") == 0) 768 li->li_number = 0; 769 else if (strcmp(sp, "any") == 0) 770 li->li_number = -1; 771 else if (*ep != '\0') 772 errx(STATUS_BADUSAGE, 773 "Invalid jail ID `%s'", sp); 774 break; 775 case LT_CLASS: 776 li->li_number = -1; 777 li->li_name = strdup(sp); 778 if (li->li_name == NULL) 779 err(STATUS_ERROR, "Cannot allocate memory"); 780 break; 781 default: 782 usage(); 783 } 784 } 785 786 if (empty) 787 usage(); 788 } 789 790 static int 791 takepid(const char *pidfile, int pidfilelock) 792 { 793 char *endp, line[BUFSIZ]; 794 FILE *fh; 795 long rval; 796 797 fh = fopen(pidfile, "r"); 798 if (fh == NULL) 799 err(STATUS_ERROR, "Cannot open pidfile `%s'", pidfile); 800 801 if (pidfilelock) { 802 /* 803 * If we can lock pidfile, this means that daemon is not 804 * running, so would be better not to kill some random process. 805 */ 806 if (flock(fileno(fh), LOCK_EX | LOCK_NB) == 0) { 807 (void)fclose(fh); 808 errx(STATUS_ERROR, "File '%s' can be locked", pidfile); 809 } else { 810 if (errno != EWOULDBLOCK) { 811 errx(STATUS_ERROR, 812 "Error while locking file '%s'", pidfile); 813 } 814 } 815 } 816 817 if (fgets(line, sizeof(line), fh) == NULL) { 818 if (feof(fh)) { 819 (void)fclose(fh); 820 errx(STATUS_ERROR, "Pidfile `%s' is empty", pidfile); 821 } 822 (void)fclose(fh); 823 err(STATUS_ERROR, "Cannot read from pid file `%s'", pidfile); 824 } 825 (void)fclose(fh); 826 827 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); 832 return (rval); 833 } 834