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 #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[_POSIX2_LINE_MAX], *mstr, **pargv, *p, *q, *pidfile; 134 const char *execf, *coref; 135 int ancestors, debug_opt, did_action; 136 int i, ch, bestidx, rv, criteria, pidfromfile, pidfilelock; 137 size_t jsz; 138 int (*action)(const struct kinfo_proc *); 139 struct kinfo_proc *kp; 140 struct list *li; 141 struct timeval best_tval; 142 regex_t reg; 143 regmatch_t regmatch; 144 pid_t pid; 145 146 setlocale(LC_ALL, ""); 147 148 if (strcmp(getprogname(), "pgrep") == 0) { 149 action = grepact; 150 pgrep = 1; 151 } else { 152 action = killact; 153 p = argv[1]; 154 155 if (argc > 1 && p[0] == '-') { 156 p++; 157 i = (int)strtol(p, &q, 10); 158 if (*q == '\0') { 159 signum = i; 160 argv++; 161 argc--; 162 } else { 163 if (strncasecmp(p, "SIG", 3) == 0) 164 p += 3; 165 for (i = 1; i < NSIG; i++) 166 if (strcasecmp(sys_signame[i], p) == 0) 167 break; 168 if (i != NSIG) { 169 signum = i; 170 argv++; 171 argc--; 172 } 173 } 174 } 175 } 176 177 ancestors = 0; 178 criteria = 0; 179 debug_opt = 0; 180 pidfile = NULL; 181 pidfilelock = 0; 182 quiet = 0; 183 execf = NULL; 184 coref = _PATH_DEVNULL; 185 186 while ((ch = getopt(argc, argv, "DF:G:ILM:N:P:SU:ac:d:fg:ij:lnoqs:t:u:vx")) != -1) 187 switch (ch) { 188 case 'D': 189 debug_opt++; 190 break; 191 case 'F': 192 pidfile = optarg; 193 criteria = 1; 194 break; 195 case 'G': 196 makelist(&rgidlist, LT_GROUP, optarg); 197 criteria = 1; 198 break; 199 case 'I': 200 if (pgrep) 201 usage(); 202 interactive = 1; 203 break; 204 case 'L': 205 pidfilelock = 1; 206 break; 207 case 'M': 208 coref = optarg; 209 break; 210 case 'N': 211 execf = optarg; 212 break; 213 case 'P': 214 makelist(&ppidlist, LT_GENERIC, optarg); 215 criteria = 1; 216 break; 217 case 'S': 218 if (!pgrep) 219 usage(); 220 kthreads = 1; 221 break; 222 case 'U': 223 makelist(&ruidlist, LT_USER, optarg); 224 criteria = 1; 225 break; 226 case 'a': 227 ancestors++; 228 break; 229 case 'c': 230 makelist(&classlist, LT_CLASS, optarg); 231 criteria = 1; 232 break; 233 case 'd': 234 if (!pgrep) 235 usage(); 236 delim = optarg; 237 break; 238 case 'f': 239 matchargs = 1; 240 break; 241 case 'g': 242 makelist(&pgrplist, LT_PGRP, optarg); 243 criteria = 1; 244 break; 245 case 'i': 246 cflags |= REG_ICASE; 247 break; 248 case 'j': 249 makelist(&jidlist, LT_JAIL, optarg); 250 criteria = 1; 251 break; 252 case 'l': 253 longfmt = 1; 254 break; 255 case 'n': 256 newest = 1; 257 criteria = 1; 258 break; 259 case 'o': 260 oldest = 1; 261 criteria = 1; 262 break; 263 case 'q': 264 if (!pgrep) 265 usage(); 266 quiet = 1; 267 break; 268 case 's': 269 makelist(&sidlist, LT_SID, optarg); 270 criteria = 1; 271 break; 272 case 't': 273 makelist(&tdevlist, LT_TTY, optarg); 274 criteria = 1; 275 break; 276 case 'u': 277 makelist(&euidlist, LT_USER, optarg); 278 criteria = 1; 279 break; 280 case 'v': 281 inverse = 1; 282 break; 283 case 'x': 284 fullmatch = 1; 285 break; 286 default: 287 usage(); 288 /* NOTREACHED */ 289 } 290 291 argc -= optind; 292 argv += optind; 293 if (argc != 0) 294 criteria = 1; 295 if (!criteria) 296 usage(); 297 if (newest && oldest) 298 errx(STATUS_ERROR, "Options -n and -o are mutually exclusive"); 299 if (pidfile != NULL) 300 pidfromfile = takepid(pidfile, pidfilelock); 301 else { 302 if (pidfilelock) { 303 errx(STATUS_ERROR, 304 "Option -L doesn't make sense without -F"); 305 } 306 pidfromfile = -1; 307 } 308 309 mypid = getpid(); 310 311 /* 312 * Retrieve the list of running processes from the kernel. 313 */ 314 kd = kvm_openfiles(execf, coref, NULL, O_RDONLY, buf); 315 if (kd == NULL) 316 errx(STATUS_ERROR, "Cannot open kernel files (%s)", buf); 317 318 /* 319 * Use KERN_PROC_PROC instead of KERN_PROC_ALL, since we 320 * just want processes and not individual kernel threads. 321 */ 322 if (pidfromfile >= 0) 323 plist = kvm_getprocs(kd, KERN_PROC_PID, pidfromfile, &nproc); 324 else 325 plist = kvm_getprocs(kd, KERN_PROC_PROC, 0, &nproc); 326 if (plist == NULL) { 327 errx(STATUS_ERROR, "Cannot get process list (%s)", 328 kvm_geterr(kd)); 329 } 330 331 /* 332 * Allocate memory which will be used to keep track of the 333 * selection. 334 */ 335 if ((selected = malloc(nproc)) == NULL) { 336 err(STATUS_ERROR, "Cannot allocate memory for %d processes", 337 nproc); 338 } 339 memset(selected, 0, nproc); 340 341 /* 342 * Refine the selection. 343 */ 344 for (; *argv != NULL; argv++) { 345 if ((rv = regcomp(®, *argv, cflags)) != 0) { 346 regerror(rv, ®, buf, sizeof(buf)); 347 errx(STATUS_BADUSAGE, 348 "Cannot compile regular expression `%s' (%s)", 349 *argv, buf); 350 } 351 352 for (i = 0, kp = plist; i < nproc; i++, kp++) { 353 if (PSKIP(kp)) { 354 if (debug_opt > 0) 355 fprintf(stderr, "* Skipped %5d %3d %s\n", 356 kp->ki_pid, kp->ki_uid, kp->ki_comm); 357 continue; 358 } 359 360 if (matchargs && 361 (pargv = kvm_getargv(kd, kp, 0)) != NULL) { 362 jsz = 0; 363 while (jsz < sizeof(buf) && *pargv != NULL) { 364 jsz += snprintf(buf + jsz, 365 sizeof(buf) - jsz, 366 pargv[1] != NULL ? "%s " : "%s", 367 pargv[0]); 368 pargv++; 369 } 370 mstr = buf; 371 } else 372 mstr = kp->ki_comm; 373 374 rv = regexec(®, mstr, 1, ®match, 0); 375 if (rv == 0) { 376 if (fullmatch) { 377 if (regmatch.rm_so == 0 && 378 regmatch.rm_eo == 379 (off_t)strlen(mstr)) 380 selected[i] = 1; 381 } else 382 selected[i] = 1; 383 } else if (rv != REG_NOMATCH) { 384 regerror(rv, ®, buf, sizeof(buf)); 385 errx(STATUS_ERROR, 386 "Regular expression evaluation error (%s)", 387 buf); 388 } 389 if (debug_opt > 1) { 390 const char *rv_res = "NoMatch"; 391 if (selected[i]) 392 rv_res = "Matched"; 393 fprintf(stderr, "* %s %5d %3d %s\n", rv_res, 394 kp->ki_pid, kp->ki_uid, mstr); 395 } 396 } 397 398 regfree(®); 399 } 400 401 for (i = 0, kp = plist; i < nproc; i++, kp++) { 402 if (PSKIP(kp)) 403 continue; 404 405 if (pidfromfile >= 0 && kp->ki_pid != pidfromfile) { 406 selected[i] = 0; 407 continue; 408 } 409 410 SLIST_FOREACH(li, &ruidlist, li_chain) 411 if (kp->ki_ruid == (uid_t)li->li_number) 412 break; 413 if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) { 414 selected[i] = 0; 415 continue; 416 } 417 418 SLIST_FOREACH(li, &rgidlist, li_chain) 419 if (kp->ki_rgid == (gid_t)li->li_number) 420 break; 421 if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) { 422 selected[i] = 0; 423 continue; 424 } 425 426 SLIST_FOREACH(li, &euidlist, li_chain) 427 if (kp->ki_uid == (uid_t)li->li_number) 428 break; 429 if (SLIST_FIRST(&euidlist) != NULL && li == NULL) { 430 selected[i] = 0; 431 continue; 432 } 433 434 SLIST_FOREACH(li, &ppidlist, li_chain) 435 if (kp->ki_ppid == (pid_t)li->li_number) 436 break; 437 if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) { 438 selected[i] = 0; 439 continue; 440 } 441 442 SLIST_FOREACH(li, &pgrplist, li_chain) 443 if (kp->ki_pgid == (pid_t)li->li_number) 444 break; 445 if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) { 446 selected[i] = 0; 447 continue; 448 } 449 450 SLIST_FOREACH(li, &tdevlist, li_chain) { 451 if (li->li_number == -1 && 452 (kp->ki_flag & P_CONTROLT) == 0) 453 break; 454 if (kp->ki_tdev == (dev_t)li->li_number) 455 break; 456 } 457 if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) { 458 selected[i] = 0; 459 continue; 460 } 461 462 SLIST_FOREACH(li, &sidlist, li_chain) 463 if (kp->ki_sid == (pid_t)li->li_number) 464 break; 465 if (SLIST_FIRST(&sidlist) != NULL && li == NULL) { 466 selected[i] = 0; 467 continue; 468 } 469 470 SLIST_FOREACH(li, &jidlist, li_chain) { 471 /* A particular jail ID, including 0 (not in jail) */ 472 if (kp->ki_jid == (int)li->li_number) 473 break; 474 /* Any jail */ 475 if (kp->ki_jid > 0 && li->li_number == -1) 476 break; 477 } 478 if (SLIST_FIRST(&jidlist) != NULL && li == NULL) { 479 selected[i] = 0; 480 continue; 481 } 482 483 SLIST_FOREACH(li, &classlist, li_chain) { 484 /* 485 * We skip P_SYSTEM processes to match ps(1) output. 486 */ 487 if ((kp->ki_flag & P_SYSTEM) == 0 && 488 strcmp(kp->ki_loginclass, li->li_name) == 0) 489 break; 490 } 491 if (SLIST_FIRST(&classlist) != NULL && li == NULL) { 492 selected[i] = 0; 493 continue; 494 } 495 496 if (argc == 0) 497 selected[i] = 1; 498 } 499 500 if (!ancestors) { 501 pid = mypid; 502 while (pid) { 503 for (i = 0, kp = plist; i < nproc; i++, kp++) { 504 if (PSKIP(kp)) 505 continue; 506 if (kp->ki_pid == pid) { 507 selected[i] = 0; 508 pid = kp->ki_ppid; 509 break; 510 } 511 } 512 if (i == nproc) { 513 if (pid == mypid) 514 pid = getppid(); 515 else 516 break; /* Maybe we're in a jail ? */ 517 } 518 } 519 } 520 521 if (newest || oldest) { 522 best_tval.tv_sec = 0; 523 best_tval.tv_usec = 0; 524 bestidx = -1; 525 526 for (i = 0, kp = plist; i < nproc; i++, kp++) { 527 if (!selected[i]) 528 continue; 529 if (bestidx == -1) { 530 /* The first entry of the list which matched. */ 531 ; 532 } else if (timercmp(&kp->ki_start, &best_tval, >)) { 533 /* This entry is newer than previous "best". */ 534 if (oldest) /* but we want the oldest */ 535 continue; 536 } else { 537 /* This entry is older than previous "best". */ 538 if (newest) /* but we want the newest */ 539 continue; 540 } 541 /* This entry is better than previous "best" entry. */ 542 best_tval.tv_sec = kp->ki_start.tv_sec; 543 best_tval.tv_usec = kp->ki_start.tv_usec; 544 bestidx = i; 545 } 546 547 memset(selected, 0, nproc); 548 if (bestidx != -1) 549 selected[bestidx] = 1; 550 } 551 552 /* 553 * Take the appropriate action for each matched process, if any. 554 */ 555 did_action = 0; 556 for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) { 557 if (PSKIP(kp)) 558 continue; 559 if (selected[i]) { 560 if (longfmt && !pgrep) { 561 did_action = 1; 562 printf("kill -%d %d\n", signum, kp->ki_pid); 563 } 564 if (inverse) 565 continue; 566 } else if (!inverse) 567 continue; 568 rv |= (*action)(kp); 569 } 570 if (!did_action && !pgrep && longfmt) 571 fprintf(stderr, 572 "No matching processes belonging to you were found\n"); 573 574 exit(rv ? STATUS_MATCH : STATUS_NOMATCH); 575 } 576 577 static void 578 usage(void) 579 { 580 const char *ustr; 581 582 if (pgrep) 583 ustr = "[-LSfilnoqvx] [-d delim]"; 584 else 585 ustr = "[-signal] [-ILfilnovx]"; 586 587 fprintf(stderr, 588 "usage: %s %s [-F pidfile] [-G gid] [-M core] [-N system]\n" 589 " [-P ppid] [-U uid] [-c class] [-g pgrp] [-j jail]\n" 590 " [-s sid] [-t tty] [-u euid] pattern ...\n", 591 getprogname(), ustr); 592 593 exit(STATUS_BADUSAGE); 594 } 595 596 static void 597 show_process(const struct kinfo_proc *kp) 598 { 599 char **argv; 600 601 if (quiet) { 602 assert(pgrep); 603 return; 604 } 605 if ((longfmt || !pgrep) && matchargs && 606 (argv = kvm_getargv(kd, kp, 0)) != NULL) { 607 printf("%d ", (int)kp->ki_pid); 608 for (; *argv != NULL; argv++) { 609 printf("%s", *argv); 610 if (argv[1] != NULL) 611 putchar(' '); 612 } 613 } else if (longfmt || !pgrep) 614 printf("%d %s", (int)kp->ki_pid, kp->ki_comm); 615 else 616 printf("%d", (int)kp->ki_pid); 617 } 618 619 static int 620 killact(const struct kinfo_proc *kp) 621 { 622 int ch, first; 623 624 if (interactive) { 625 /* 626 * Be careful, ask before killing. 627 */ 628 printf("kill "); 629 show_process(kp); 630 printf("? "); 631 fflush(stdout); 632 first = ch = getchar(); 633 while (ch != '\n' && ch != EOF) 634 ch = getchar(); 635 if (first != 'y' && first != 'Y') 636 return (1); 637 } 638 if (kill(kp->ki_pid, signum) == -1) { 639 /* 640 * Check for ESRCH, which indicates that the process 641 * disappeared between us matching it and us 642 * signalling it; don't issue a warning about it. 643 */ 644 if (errno != ESRCH) 645 warn("signalling pid %d", (int)kp->ki_pid); 646 /* 647 * Return 0 to indicate that the process should not be 648 * considered a match, since we didn't actually get to 649 * signal it. 650 */ 651 return (0); 652 } 653 return (1); 654 } 655 656 static int 657 grepact(const struct kinfo_proc *kp) 658 { 659 660 show_process(kp); 661 if (!quiet) 662 printf("%s", delim); 663 return (1); 664 } 665 666 static void 667 makelist(struct listhead *head, enum listtype type, char *src) 668 { 669 struct list *li; 670 struct passwd *pw; 671 struct group *gr; 672 struct stat st; 673 const char *cp; 674 char *sp, *ep, buf[MAXPATHLEN]; 675 int empty; 676 677 empty = 1; 678 679 while ((sp = strsep(&src, ",")) != NULL) { 680 if (*sp == '\0') 681 usage(); 682 683 if ((li = malloc(sizeof(*li))) == NULL) { 684 err(STATUS_ERROR, "Cannot allocate %zu bytes", 685 sizeof(*li)); 686 } 687 688 SLIST_INSERT_HEAD(head, li, li_chain); 689 empty = 0; 690 691 if (type != LT_CLASS) 692 li->li_number = (uid_t)strtol(sp, &ep, 0); 693 694 if (type != LT_CLASS && *ep == '\0') { 695 switch (type) { 696 case LT_PGRP: 697 if (li->li_number == 0) 698 li->li_number = getpgrp(); 699 break; 700 case LT_SID: 701 if (li->li_number == 0) 702 li->li_number = getsid(mypid); 703 break; 704 case LT_JAIL: 705 if (li->li_number < 0) 706 errx(STATUS_BADUSAGE, 707 "Negative jail ID `%s'", sp); 708 /* For compatibility with old -j */ 709 if (li->li_number == 0) 710 li->li_number = -1; /* any jail */ 711 break; 712 case LT_TTY: 713 if (li->li_number < 0) 714 errx(STATUS_BADUSAGE, 715 "Negative /dev/pts tty `%s'", sp); 716 snprintf(buf, sizeof(buf), _PATH_DEV "pts/%s", 717 sp); 718 if (stat(buf, &st) != -1) 719 goto foundtty; 720 if (errno == ENOENT) 721 errx(STATUS_BADUSAGE, "No such tty: `" 722 _PATH_DEV "pts/%s'", sp); 723 err(STATUS_ERROR, "Cannot access `" 724 _PATH_DEV "pts/%s'", sp); 725 break; 726 default: 727 break; 728 } 729 continue; 730 } 731 732 switch (type) { 733 case LT_USER: 734 if ((pw = getpwnam(sp)) == NULL) 735 errx(STATUS_BADUSAGE, "Unknown user `%s'", sp); 736 li->li_number = pw->pw_uid; 737 break; 738 case LT_GROUP: 739 if ((gr = getgrnam(sp)) == NULL) 740 errx(STATUS_BADUSAGE, "Unknown group `%s'", sp); 741 li->li_number = gr->gr_gid; 742 break; 743 case LT_TTY: 744 if (strcmp(sp, "-") == 0) { 745 li->li_number = -1; 746 break; 747 } else if (strcmp(sp, "co") == 0) { 748 cp = "console"; 749 } else { 750 cp = sp; 751 } 752 753 snprintf(buf, sizeof(buf), _PATH_DEV "%s", cp); 754 if (stat(buf, &st) != -1) 755 goto foundtty; 756 757 snprintf(buf, sizeof(buf), _PATH_DEV "tty%s", cp); 758 if (stat(buf, &st) != -1) 759 goto foundtty; 760 761 if (errno == ENOENT) 762 errx(STATUS_BADUSAGE, "No such tty: `%s'", sp); 763 err(STATUS_ERROR, "Cannot access `%s'", sp); 764 765 foundtty: if ((st.st_mode & S_IFCHR) == 0) 766 errx(STATUS_BADUSAGE, "Not a tty: `%s'", sp); 767 768 li->li_number = st.st_rdev; 769 break; 770 case LT_JAIL: { 771 int jid; 772 773 if (strcmp(sp, "none") == 0) 774 li->li_number = 0; 775 else if (strcmp(sp, "any") == 0) 776 li->li_number = -1; 777 else if ((jid = jail_getid(sp)) != -1) 778 li->li_number = jid; 779 else if (*ep != '\0') 780 errx(STATUS_BADUSAGE, 781 "Invalid jail ID or name `%s'", sp); 782 break; 783 } 784 case LT_CLASS: 785 li->li_number = -1; 786 li->li_name = strdup(sp); 787 if (li->li_name == NULL) 788 err(STATUS_ERROR, "Cannot allocate memory"); 789 break; 790 default: 791 usage(); 792 } 793 } 794 795 if (empty) 796 usage(); 797 } 798 799 static int 800 takepid(const char *pidfile, int pidfilelock) 801 { 802 char *endp, line[BUFSIZ]; 803 FILE *fh; 804 long rval; 805 806 fh = fopen(pidfile, "r"); 807 if (fh == NULL) 808 err(STATUS_ERROR, "Cannot open pidfile `%s'", pidfile); 809 810 if (pidfilelock) { 811 /* 812 * If we can lock pidfile, this means that daemon is not 813 * running, so would be better not to kill some random process. 814 */ 815 if (flock(fileno(fh), LOCK_EX | LOCK_NB) == 0) { 816 (void)fclose(fh); 817 errx(STATUS_ERROR, "File '%s' can be locked", pidfile); 818 } else { 819 if (errno != EWOULDBLOCK) { 820 errx(STATUS_ERROR, 821 "Error while locking file '%s'", pidfile); 822 } 823 } 824 } 825 826 if (fgets(line, sizeof(line), fh) == NULL) { 827 if (feof(fh)) { 828 (void)fclose(fh); 829 errx(STATUS_ERROR, "Pidfile `%s' is empty", pidfile); 830 } 831 (void)fclose(fh); 832 err(STATUS_ERROR, "Cannot read from pid file `%s'", pidfile); 833 } 834 (void)fclose(fh); 835 836 rval = strtol(line, &endp, 10); 837 if (*endp != '\0' && !isspace((unsigned char)*endp)) 838 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile); 839 else if (rval < MIN_PID || rval > MAX_PID) 840 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile); 841 return (rval); 842 } 843