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 if (pidfromfile >= 0) 322 plist = kvm_getprocs(kd, KERN_PROC_PID, pidfromfile, &nproc); 323 else 324 plist = kvm_getprocs(kd, KERN_PROC_PROC, 0, &nproc); 325 if (plist == NULL) { 326 errx(STATUS_ERROR, "Cannot get process list (%s)", 327 kvm_geterr(kd)); 328 } 329 330 /* 331 * Allocate memory which will be used to keep track of the 332 * selection. 333 */ 334 if ((selected = malloc(nproc)) == NULL) { 335 err(STATUS_ERROR, "Cannot allocate memory for %d processes", 336 nproc); 337 } 338 memset(selected, 0, nproc); 339 340 /* 341 * Refine the selection. 342 */ 343 for (; *argv != NULL; argv++) { 344 if ((rv = regcomp(®, *argv, cflags)) != 0) { 345 regerror(rv, ®, buf, sizeof(buf)); 346 errx(STATUS_BADUSAGE, 347 "Cannot compile regular expression `%s' (%s)", 348 *argv, buf); 349 } 350 351 for (i = 0, kp = plist; i < nproc; i++, kp++) { 352 if (PSKIP(kp)) { 353 if (debug_opt > 0) 354 fprintf(stderr, "* Skipped %5d %3d %s\n", 355 kp->ki_pid, kp->ki_uid, kp->ki_comm); 356 continue; 357 } 358 359 if (matchargs && 360 (pargv = kvm_getargv(kd, kp, 0)) != NULL) { 361 jsz = 0; 362 while (jsz < sizeof(buf) && *pargv != NULL) { 363 jsz += snprintf(buf + jsz, 364 sizeof(buf) - jsz, 365 pargv[1] != NULL ? "%s " : "%s", 366 pargv[0]); 367 pargv++; 368 } 369 mstr = buf; 370 } else 371 mstr = kp->ki_comm; 372 373 rv = regexec(®, mstr, 1, ®match, 0); 374 if (rv == 0) { 375 if (fullmatch) { 376 if (regmatch.rm_so == 0 && 377 regmatch.rm_eo == 378 (off_t)strlen(mstr)) 379 selected[i] = 1; 380 } else 381 selected[i] = 1; 382 } else if (rv != REG_NOMATCH) { 383 regerror(rv, ®, buf, sizeof(buf)); 384 errx(STATUS_ERROR, 385 "Regular expression evaluation error (%s)", 386 buf); 387 } 388 if (debug_opt > 1) { 389 const char *rv_res = "NoMatch"; 390 if (selected[i]) 391 rv_res = "Matched"; 392 fprintf(stderr, "* %s %5d %3d %s\n", rv_res, 393 kp->ki_pid, kp->ki_uid, mstr); 394 } 395 } 396 397 regfree(®); 398 } 399 400 for (i = 0, kp = plist; i < nproc; i++, kp++) { 401 if (PSKIP(kp)) 402 continue; 403 404 if (pidfromfile >= 0 && kp->ki_pid != pidfromfile) { 405 selected[i] = 0; 406 continue; 407 } 408 409 SLIST_FOREACH(li, &ruidlist, li_chain) 410 if (kp->ki_ruid == (uid_t)li->li_number) 411 break; 412 if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) { 413 selected[i] = 0; 414 continue; 415 } 416 417 SLIST_FOREACH(li, &rgidlist, li_chain) 418 if (kp->ki_rgid == (gid_t)li->li_number) 419 break; 420 if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) { 421 selected[i] = 0; 422 continue; 423 } 424 425 SLIST_FOREACH(li, &euidlist, li_chain) 426 if (kp->ki_uid == (uid_t)li->li_number) 427 break; 428 if (SLIST_FIRST(&euidlist) != NULL && li == NULL) { 429 selected[i] = 0; 430 continue; 431 } 432 433 SLIST_FOREACH(li, &ppidlist, li_chain) 434 if (kp->ki_ppid == (pid_t)li->li_number) 435 break; 436 if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) { 437 selected[i] = 0; 438 continue; 439 } 440 441 SLIST_FOREACH(li, &pgrplist, li_chain) 442 if (kp->ki_pgid == (pid_t)li->li_number) 443 break; 444 if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) { 445 selected[i] = 0; 446 continue; 447 } 448 449 SLIST_FOREACH(li, &tdevlist, li_chain) { 450 if (li->li_number == -1 && 451 (kp->ki_flag & P_CONTROLT) == 0) 452 break; 453 if (kp->ki_tdev == (dev_t)li->li_number) 454 break; 455 } 456 if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) { 457 selected[i] = 0; 458 continue; 459 } 460 461 SLIST_FOREACH(li, &sidlist, li_chain) 462 if (kp->ki_sid == (pid_t)li->li_number) 463 break; 464 if (SLIST_FIRST(&sidlist) != NULL && li == NULL) { 465 selected[i] = 0; 466 continue; 467 } 468 469 SLIST_FOREACH(li, &jidlist, li_chain) { 470 /* A particular jail ID, including 0 (not in jail) */ 471 if (kp->ki_jid == (int)li->li_number) 472 break; 473 /* Any jail */ 474 if (kp->ki_jid > 0 && li->li_number == -1) 475 break; 476 } 477 if (SLIST_FIRST(&jidlist) != NULL && li == NULL) { 478 selected[i] = 0; 479 continue; 480 } 481 482 SLIST_FOREACH(li, &classlist, li_chain) { 483 /* 484 * We skip P_SYSTEM processes to match ps(1) output. 485 */ 486 if ((kp->ki_flag & P_SYSTEM) == 0 && 487 strcmp(kp->ki_loginclass, li->li_name) == 0) 488 break; 489 } 490 if (SLIST_FIRST(&classlist) != NULL && li == NULL) { 491 selected[i] = 0; 492 continue; 493 } 494 495 if (argc == 0) 496 selected[i] = 1; 497 } 498 499 if (!ancestors) { 500 pid = mypid; 501 while (pid) { 502 for (i = 0, kp = plist; i < nproc; i++, kp++) { 503 if (PSKIP(kp)) 504 continue; 505 if (kp->ki_pid == pid) { 506 selected[i] = 0; 507 pid = kp->ki_ppid; 508 break; 509 } 510 } 511 if (i == nproc) { 512 if (pid == mypid) 513 pid = getppid(); 514 else 515 break; /* Maybe we're in a jail ? */ 516 } 517 } 518 } 519 520 if (newest || oldest) { 521 best_tval.tv_sec = 0; 522 best_tval.tv_usec = 0; 523 bestidx = -1; 524 525 for (i = 0, kp = plist; i < nproc; i++, kp++) { 526 if (!selected[i]) 527 continue; 528 if (bestidx == -1) { 529 /* The first entry of the list which matched. */ 530 ; 531 } else if (timercmp(&kp->ki_start, &best_tval, >)) { 532 /* This entry is newer than previous "best". */ 533 if (oldest) /* but we want the oldest */ 534 continue; 535 } else { 536 /* This entry is older than previous "best". */ 537 if (newest) /* but we want the newest */ 538 continue; 539 } 540 /* This entry is better than previous "best" entry. */ 541 best_tval.tv_sec = kp->ki_start.tv_sec; 542 best_tval.tv_usec = kp->ki_start.tv_usec; 543 bestidx = i; 544 } 545 546 memset(selected, 0, nproc); 547 if (bestidx != -1) 548 selected[bestidx] = 1; 549 } 550 551 /* 552 * Take the appropriate action for each matched process, if any. 553 */ 554 did_action = 0; 555 for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) { 556 if (PSKIP(kp)) 557 continue; 558 if (selected[i]) { 559 if (longfmt && !pgrep) { 560 did_action = 1; 561 printf("kill -%d %d\n", signum, kp->ki_pid); 562 } 563 if (inverse) 564 continue; 565 } else if (!inverse) 566 continue; 567 rv |= (*action)(kp); 568 } 569 if (!did_action && !pgrep && longfmt) 570 fprintf(stderr, 571 "No matching processes belonging to you were found\n"); 572 573 exit(rv ? STATUS_MATCH : STATUS_NOMATCH); 574 } 575 576 static void 577 usage(void) 578 { 579 const char *ustr; 580 581 if (pgrep) 582 ustr = "[-LSfilnoqvx] [-d delim]"; 583 else 584 ustr = "[-signal] [-ILfilnovx]"; 585 586 fprintf(stderr, 587 "usage: %s %s [-F pidfile] [-G gid] [-M core] [-N system]\n" 588 " [-P ppid] [-U uid] [-c class] [-g pgrp] [-j jid]\n" 589 " [-s sid] [-t tty] [-u euid] pattern ...\n", 590 getprogname(), ustr); 591 592 exit(STATUS_BADUSAGE); 593 } 594 595 static void 596 show_process(const struct kinfo_proc *kp) 597 { 598 char **argv; 599 600 if (quiet) { 601 assert(pgrep); 602 return; 603 } 604 if ((longfmt || !pgrep) && matchargs && 605 (argv = kvm_getargv(kd, kp, 0)) != NULL) { 606 printf("%d ", (int)kp->ki_pid); 607 for (; *argv != NULL; argv++) { 608 printf("%s", *argv); 609 if (argv[1] != NULL) 610 putchar(' '); 611 } 612 } else if (longfmt || !pgrep) 613 printf("%d %s", (int)kp->ki_pid, kp->ki_comm); 614 else 615 printf("%d", (int)kp->ki_pid); 616 } 617 618 static int 619 killact(const struct kinfo_proc *kp) 620 { 621 int ch, first; 622 623 if (interactive) { 624 /* 625 * Be careful, ask before killing. 626 */ 627 printf("kill "); 628 show_process(kp); 629 printf("? "); 630 fflush(stdout); 631 first = ch = getchar(); 632 while (ch != '\n' && ch != EOF) 633 ch = getchar(); 634 if (first != 'y' && first != 'Y') 635 return (1); 636 } 637 if (kill(kp->ki_pid, signum) == -1) { 638 /* 639 * Check for ESRCH, which indicates that the process 640 * disappeared between us matching it and us 641 * signalling it; don't issue a warning about it. 642 */ 643 if (errno != ESRCH) 644 warn("signalling pid %d", (int)kp->ki_pid); 645 /* 646 * Return 0 to indicate that the process should not be 647 * considered a match, since we didn't actually get to 648 * signal it. 649 */ 650 return (0); 651 } 652 return (1); 653 } 654 655 static int 656 grepact(const struct kinfo_proc *kp) 657 { 658 659 show_process(kp); 660 if (!quiet) 661 printf("%s", delim); 662 return (1); 663 } 664 665 static void 666 makelist(struct listhead *head, enum listtype type, char *src) 667 { 668 struct list *li; 669 struct passwd *pw; 670 struct group *gr; 671 struct stat st; 672 const char *cp; 673 char *sp, *ep, buf[MAXPATHLEN]; 674 int empty; 675 676 empty = 1; 677 678 while ((sp = strsep(&src, ",")) != NULL) { 679 if (*sp == '\0') 680 usage(); 681 682 if ((li = malloc(sizeof(*li))) == NULL) { 683 err(STATUS_ERROR, "Cannot allocate %zu bytes", 684 sizeof(*li)); 685 } 686 687 SLIST_INSERT_HEAD(head, li, li_chain); 688 empty = 0; 689 690 if (type != LT_CLASS) 691 li->li_number = (uid_t)strtol(sp, &ep, 0); 692 693 if (type != LT_CLASS && *ep == '\0') { 694 switch (type) { 695 case LT_PGRP: 696 if (li->li_number == 0) 697 li->li_number = getpgrp(); 698 break; 699 case LT_SID: 700 if (li->li_number == 0) 701 li->li_number = getsid(mypid); 702 break; 703 case LT_JID: 704 if (li->li_number < 0) 705 errx(STATUS_BADUSAGE, 706 "Negative jail ID `%s'", sp); 707 /* For compatibility with old -j */ 708 if (li->li_number == 0) 709 li->li_number = -1; /* any jail */ 710 break; 711 case LT_TTY: 712 if (li->li_number < 0) 713 errx(STATUS_BADUSAGE, 714 "Negative /dev/pts tty `%s'", sp); 715 snprintf(buf, sizeof(buf), _PATH_DEV "pts/%s", 716 sp); 717 if (stat(buf, &st) != -1) 718 goto foundtty; 719 if (errno == ENOENT) 720 errx(STATUS_BADUSAGE, "No such tty: `" 721 _PATH_DEV "pts/%s'", sp); 722 err(STATUS_ERROR, "Cannot access `" 723 _PATH_DEV "pts/%s'", sp); 724 break; 725 default: 726 break; 727 } 728 continue; 729 } 730 731 switch (type) { 732 case LT_USER: 733 if ((pw = getpwnam(sp)) == NULL) 734 errx(STATUS_BADUSAGE, "Unknown user `%s'", sp); 735 li->li_number = pw->pw_uid; 736 break; 737 case LT_GROUP: 738 if ((gr = getgrnam(sp)) == NULL) 739 errx(STATUS_BADUSAGE, "Unknown group `%s'", sp); 740 li->li_number = gr->gr_gid; 741 break; 742 case LT_TTY: 743 if (strcmp(sp, "-") == 0) { 744 li->li_number = -1; 745 break; 746 } else if (strcmp(sp, "co") == 0) { 747 cp = "console"; 748 } else { 749 cp = sp; 750 } 751 752 snprintf(buf, sizeof(buf), _PATH_DEV "%s", cp); 753 if (stat(buf, &st) != -1) 754 goto foundtty; 755 756 snprintf(buf, sizeof(buf), _PATH_DEV "tty%s", cp); 757 if (stat(buf, &st) != -1) 758 goto foundtty; 759 760 if (errno == ENOENT) 761 errx(STATUS_BADUSAGE, "No such tty: `%s'", sp); 762 err(STATUS_ERROR, "Cannot access `%s'", sp); 763 764 foundtty: if ((st.st_mode & S_IFCHR) == 0) 765 errx(STATUS_BADUSAGE, "Not a tty: `%s'", sp); 766 767 li->li_number = st.st_rdev; 768 break; 769 case LT_JID: 770 if (strcmp(sp, "none") == 0) 771 li->li_number = 0; 772 else if (strcmp(sp, "any") == 0) 773 li->li_number = -1; 774 else if (*ep != '\0') 775 errx(STATUS_BADUSAGE, 776 "Invalid jail ID `%s'", sp); 777 break; 778 case LT_CLASS: 779 li->li_number = -1; 780 li->li_name = strdup(sp); 781 if (li->li_name == NULL) 782 err(STATUS_ERROR, "Cannot allocate memory"); 783 break; 784 default: 785 usage(); 786 } 787 } 788 789 if (empty) 790 usage(); 791 } 792 793 static int 794 takepid(const char *pidfile, int pidfilelock) 795 { 796 char *endp, line[BUFSIZ]; 797 FILE *fh; 798 long rval; 799 800 fh = fopen(pidfile, "r"); 801 if (fh == NULL) 802 err(STATUS_ERROR, "Cannot open pidfile `%s'", pidfile); 803 804 if (pidfilelock) { 805 /* 806 * If we can lock pidfile, this means that daemon is not 807 * running, so would be better not to kill some random process. 808 */ 809 if (flock(fileno(fh), LOCK_EX | LOCK_NB) == 0) { 810 (void)fclose(fh); 811 errx(STATUS_ERROR, "File '%s' can be locked", pidfile); 812 } else { 813 if (errno != EWOULDBLOCK) { 814 errx(STATUS_ERROR, 815 "Error while locking file '%s'", pidfile); 816 } 817 } 818 } 819 820 if (fgets(line, sizeof(line), fh) == NULL) { 821 if (feof(fh)) { 822 (void)fclose(fh); 823 errx(STATUS_ERROR, "Pidfile `%s' is empty", pidfile); 824 } 825 (void)fclose(fh); 826 err(STATUS_ERROR, "Cannot read from pid file `%s'", pidfile); 827 } 828 (void)fclose(fh); 829 830 rval = strtol(line, &endp, 10); 831 if (*endp != '\0' && !isspace((unsigned char)*endp)) 832 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile); 833 else if (rval < MIN_PID || rval > MAX_PID) 834 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile); 835 return (rval); 836 } 837