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 }; 84 85 struct list { 86 SLIST_ENTRY(list) li_chain; 87 long li_number; 88 }; 89 90 SLIST_HEAD(listhead, list); 91 92 static struct kinfo_proc *plist; 93 static char *selected; 94 static const char *delim = "\n"; 95 static int nproc; 96 static int pgrep; 97 static int signum = SIGTERM; 98 static int newest; 99 static int oldest; 100 static int interactive; 101 static int inverse; 102 static int longfmt; 103 static int matchargs; 104 static int fullmatch; 105 static int kthreads; 106 static int cflags = REG_EXTENDED; 107 static int quiet; 108 static kvm_t *kd; 109 static pid_t mypid; 110 111 static struct listhead euidlist = SLIST_HEAD_INITIALIZER(euidlist); 112 static struct listhead ruidlist = SLIST_HEAD_INITIALIZER(ruidlist); 113 static struct listhead rgidlist = SLIST_HEAD_INITIALIZER(rgidlist); 114 static struct listhead pgrplist = SLIST_HEAD_INITIALIZER(pgrplist); 115 static struct listhead ppidlist = SLIST_HEAD_INITIALIZER(ppidlist); 116 static struct listhead tdevlist = SLIST_HEAD_INITIALIZER(tdevlist); 117 static struct listhead sidlist = SLIST_HEAD_INITIALIZER(sidlist); 118 static struct listhead jidlist = SLIST_HEAD_INITIALIZER(jidlist); 119 120 static void usage(void) __attribute__((__noreturn__)); 121 static int killact(const struct kinfo_proc *); 122 static int grepact(const struct kinfo_proc *); 123 static void makelist(struct listhead *, enum listtype, char *); 124 static int takepid(const char *, int); 125 126 int 127 main(int argc, char **argv) 128 { 129 char buf[_POSIX2_LINE_MAX], *mstr, **pargv, *p, *q, *pidfile; 130 const char *execf, *coref; 131 int ancestors, debug_opt; 132 int i, ch, bestidx, rv, criteria, pidfromfile, pidfilelock; 133 size_t jsz; 134 int (*action)(const struct kinfo_proc *); 135 struct kinfo_proc *kp; 136 struct list *li; 137 struct timeval best_tval; 138 regex_t reg; 139 regmatch_t regmatch; 140 pid_t pid; 141 142 setlocale(LC_ALL, ""); 143 144 if (strcmp(getprogname(), "pgrep") == 0) { 145 action = grepact; 146 pgrep = 1; 147 } else { 148 action = killact; 149 p = argv[1]; 150 151 if (argc > 1 && p[0] == '-') { 152 p++; 153 i = (int)strtol(p, &q, 10); 154 if (*q == '\0') { 155 signum = i; 156 argv++; 157 argc--; 158 } else { 159 if (strncasecmp(p, "sig", 3) == 0) 160 p += 3; 161 for (i = 1; i < NSIG; i++) 162 if (strcasecmp(sys_signame[i], p) == 0) 163 break; 164 if (i != NSIG) { 165 signum = i; 166 argv++; 167 argc--; 168 } 169 } 170 } 171 } 172 173 ancestors = 0; 174 criteria = 0; 175 debug_opt = 0; 176 pidfile = NULL; 177 pidfilelock = 0; 178 quiet = 0; 179 execf = NULL; 180 coref = _PATH_DEVNULL; 181 182 while ((ch = getopt(argc, argv, "DF:G:ILM:N:P:SU:ad:fg:ij:lnoqs:t:u:vx")) != -1) 183 switch (ch) { 184 case 'D': 185 debug_opt++; 186 break; 187 case 'F': 188 pidfile = optarg; 189 criteria = 1; 190 break; 191 case 'G': 192 makelist(&rgidlist, LT_GROUP, optarg); 193 criteria = 1; 194 break; 195 case 'I': 196 if (pgrep) 197 usage(); 198 interactive = 1; 199 break; 200 case 'L': 201 pidfilelock = 1; 202 break; 203 case 'M': 204 coref = optarg; 205 break; 206 case 'N': 207 execf = optarg; 208 break; 209 case 'P': 210 makelist(&ppidlist, LT_GENERIC, optarg); 211 criteria = 1; 212 break; 213 case 'S': 214 if (!pgrep) 215 usage(); 216 kthreads = 1; 217 break; 218 case 'U': 219 makelist(&ruidlist, LT_USER, optarg); 220 criteria = 1; 221 break; 222 case 'a': 223 ancestors++; 224 break; 225 case 'd': 226 if (!pgrep) 227 usage(); 228 delim = optarg; 229 break; 230 case 'f': 231 matchargs = 1; 232 break; 233 case 'g': 234 makelist(&pgrplist, LT_PGRP, optarg); 235 criteria = 1; 236 break; 237 case 'i': 238 cflags |= REG_ICASE; 239 break; 240 case 'j': 241 makelist(&jidlist, LT_JID, optarg); 242 criteria = 1; 243 break; 244 case 'l': 245 if (!pgrep) 246 usage(); 247 longfmt = 1; 248 break; 249 case 'n': 250 newest = 1; 251 criteria = 1; 252 break; 253 case 'o': 254 oldest = 1; 255 criteria = 1; 256 break; 257 case 'q': 258 if (!pgrep) 259 usage(); 260 quiet = 1; 261 break; 262 case 's': 263 makelist(&sidlist, LT_SID, optarg); 264 criteria = 1; 265 break; 266 case 't': 267 makelist(&tdevlist, LT_TTY, optarg); 268 criteria = 1; 269 break; 270 case 'u': 271 makelist(&euidlist, LT_USER, optarg); 272 criteria = 1; 273 break; 274 case 'v': 275 inverse = 1; 276 break; 277 case 'x': 278 fullmatch = 1; 279 break; 280 default: 281 usage(); 282 /* NOTREACHED */ 283 } 284 285 argc -= optind; 286 argv += optind; 287 if (argc != 0) 288 criteria = 1; 289 if (!criteria) 290 usage(); 291 if (newest && oldest) 292 errx(STATUS_ERROR, "Options -n and -o are mutually exclusive"); 293 if (pidfile != NULL) 294 pidfromfile = takepid(pidfile, pidfilelock); 295 else { 296 if (pidfilelock) { 297 errx(STATUS_ERROR, 298 "Option -L doesn't make sense without -F"); 299 } 300 pidfromfile = -1; 301 } 302 303 mypid = getpid(); 304 305 /* 306 * Retrieve the list of running processes from the kernel. 307 */ 308 kd = kvm_openfiles(execf, coref, NULL, O_RDONLY, buf); 309 if (kd == NULL) 310 errx(STATUS_ERROR, "Cannot open kernel files (%s)", buf); 311 312 /* 313 * Use KERN_PROC_PROC instead of KERN_PROC_ALL, since we 314 * just want processes and not individual kernel threads. 315 */ 316 plist = kvm_getprocs(kd, KERN_PROC_PROC, 0, &nproc); 317 if (plist == NULL) { 318 errx(STATUS_ERROR, "Cannot get process list (%s)", 319 kvm_geterr(kd)); 320 } 321 322 /* 323 * Allocate memory which will be used to keep track of the 324 * selection. 325 */ 326 if ((selected = malloc(nproc)) == NULL) { 327 err(STATUS_ERROR, "Cannot allocate memory for %d processes", 328 nproc); 329 } 330 memset(selected, 0, nproc); 331 332 /* 333 * Refine the selection. 334 */ 335 for (; *argv != NULL; argv++) { 336 if ((rv = regcomp(®, *argv, cflags)) != 0) { 337 regerror(rv, ®, buf, sizeof(buf)); 338 errx(STATUS_BADUSAGE, 339 "Cannot compile regular expression `%s' (%s)", 340 *argv, buf); 341 } 342 343 for (i = 0, kp = plist; i < nproc; i++, kp++) { 344 if (PSKIP(kp)) { 345 if (debug_opt > 0) 346 fprintf(stderr, "* Skipped %5d %3d %s\n", 347 kp->ki_pid, kp->ki_uid, kp->ki_comm); 348 continue; 349 } 350 351 if (matchargs && 352 (pargv = kvm_getargv(kd, kp, 0)) != NULL) { 353 jsz = 0; 354 while (jsz < sizeof(buf) && *pargv != NULL) { 355 jsz += snprintf(buf + jsz, 356 sizeof(buf) - jsz, 357 pargv[1] != NULL ? "%s " : "%s", 358 pargv[0]); 359 pargv++; 360 } 361 mstr = buf; 362 } else 363 mstr = kp->ki_comm; 364 365 rv = regexec(®, mstr, 1, ®match, 0); 366 if (rv == 0) { 367 if (fullmatch) { 368 if (regmatch.rm_so == 0 && 369 regmatch.rm_eo == 370 (off_t)strlen(mstr)) 371 selected[i] = 1; 372 } else 373 selected[i] = 1; 374 } else if (rv != REG_NOMATCH) { 375 regerror(rv, ®, buf, sizeof(buf)); 376 errx(STATUS_ERROR, 377 "Regular expression evaluation error (%s)", 378 buf); 379 } 380 if (debug_opt > 1) { 381 const char *rv_res = "NoMatch"; 382 if (selected[i]) 383 rv_res = "Matched"; 384 fprintf(stderr, "* %s %5d %3d %s\n", rv_res, 385 kp->ki_pid, kp->ki_uid, mstr); 386 } 387 } 388 389 regfree(®); 390 } 391 392 for (i = 0, kp = plist; i < nproc; i++, kp++) { 393 if (PSKIP(kp)) 394 continue; 395 396 if (pidfromfile >= 0 && kp->ki_pid != pidfromfile) { 397 selected[i] = 0; 398 continue; 399 } 400 401 SLIST_FOREACH(li, &ruidlist, li_chain) 402 if (kp->ki_ruid == (uid_t)li->li_number) 403 break; 404 if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) { 405 selected[i] = 0; 406 continue; 407 } 408 409 SLIST_FOREACH(li, &rgidlist, li_chain) 410 if (kp->ki_rgid == (gid_t)li->li_number) 411 break; 412 if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) { 413 selected[i] = 0; 414 continue; 415 } 416 417 SLIST_FOREACH(li, &euidlist, li_chain) 418 if (kp->ki_uid == (uid_t)li->li_number) 419 break; 420 if (SLIST_FIRST(&euidlist) != NULL && li == NULL) { 421 selected[i] = 0; 422 continue; 423 } 424 425 SLIST_FOREACH(li, &ppidlist, li_chain) 426 if (kp->ki_ppid == (pid_t)li->li_number) 427 break; 428 if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) { 429 selected[i] = 0; 430 continue; 431 } 432 433 SLIST_FOREACH(li, &pgrplist, li_chain) 434 if (kp->ki_pgid == (pid_t)li->li_number) 435 break; 436 if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) { 437 selected[i] = 0; 438 continue; 439 } 440 441 SLIST_FOREACH(li, &tdevlist, li_chain) { 442 if (li->li_number == -1 && 443 (kp->ki_flag & P_CONTROLT) == 0) 444 break; 445 if (kp->ki_tdev == (dev_t)li->li_number) 446 break; 447 } 448 if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) { 449 selected[i] = 0; 450 continue; 451 } 452 453 SLIST_FOREACH(li, &sidlist, li_chain) 454 if (kp->ki_sid == (pid_t)li->li_number) 455 break; 456 if (SLIST_FIRST(&sidlist) != NULL && li == NULL) { 457 selected[i] = 0; 458 continue; 459 } 460 461 SLIST_FOREACH(li, &jidlist, li_chain) { 462 /* A particular jail ID, including 0 (not in jail) */ 463 if (kp->ki_jid == (int)li->li_number) 464 break; 465 /* Any jail */ 466 if (kp->ki_jid > 0 && li->li_number == -1) 467 break; 468 } 469 if (SLIST_FIRST(&jidlist) != NULL && li == NULL) { 470 selected[i] = 0; 471 continue; 472 } 473 474 if (argc == 0) 475 selected[i] = 1; 476 } 477 478 if (!ancestors) { 479 pid = mypid; 480 while (pid) { 481 for (i = 0, kp = plist; i < nproc; i++, kp++) { 482 if (PSKIP(kp)) 483 continue; 484 if (kp->ki_pid == pid) { 485 selected[i] = 0; 486 pid = kp->ki_ppid; 487 break; 488 } 489 } 490 if (i == nproc) { 491 if (pid == mypid) 492 pid = getppid(); 493 else 494 break; /* Maybe we're in a jail ? */ 495 } 496 } 497 } 498 499 if (newest || oldest) { 500 best_tval.tv_sec = 0; 501 best_tval.tv_usec = 0; 502 bestidx = -1; 503 504 for (i = 0, kp = plist; i < nproc; i++, kp++) { 505 if (!selected[i]) 506 continue; 507 if (bestidx == -1) { 508 /* The first entry of the list which matched. */ 509 ; 510 } else if (timercmp(&kp->ki_start, &best_tval, >)) { 511 /* This entry is newer than previous "best". */ 512 if (oldest) /* but we want the oldest */ 513 continue; 514 } else { 515 /* This entry is older than previous "best". */ 516 if (newest) /* but we want the newest */ 517 continue; 518 } 519 /* This entry is better than previous "best" entry. */ 520 best_tval.tv_sec = kp->ki_start.tv_sec; 521 best_tval.tv_usec = kp->ki_start.tv_usec; 522 bestidx = i; 523 } 524 525 memset(selected, 0, nproc); 526 if (bestidx != -1) 527 selected[bestidx] = 1; 528 } 529 530 /* 531 * Take the appropriate action for each matched process, if any. 532 */ 533 for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) { 534 if (PSKIP(kp)) 535 continue; 536 if (selected[i]) { 537 if (inverse) 538 continue; 539 } else if (!inverse) 540 continue; 541 rv |= (*action)(kp); 542 } 543 544 exit(rv ? STATUS_MATCH : STATUS_NOMATCH); 545 } 546 547 static void 548 usage(void) 549 { 550 const char *ustr; 551 552 if (pgrep) 553 ustr = "[-LSfilnoqvx] [-d delim]"; 554 else 555 ustr = "[-signal] [-ILfinovx]"; 556 557 fprintf(stderr, 558 "usage: %s %s [-F pidfile] [-G gid] [-M core] [-N system]\n" 559 " [-P ppid] [-U uid] [-g pgrp] [-j jid] [-s sid]\n" 560 " [-t tty] [-u euid] pattern ...\n", getprogname(), 561 ustr); 562 563 exit(STATUS_BADUSAGE); 564 } 565 566 static void 567 show_process(const struct kinfo_proc *kp) 568 { 569 char **argv; 570 571 if (quiet) { 572 assert(pgrep); 573 return; 574 } 575 if ((longfmt || !pgrep) && matchargs && 576 (argv = kvm_getargv(kd, kp, 0)) != NULL) { 577 printf("%d ", (int)kp->ki_pid); 578 for (; *argv != NULL; argv++) { 579 printf("%s", *argv); 580 if (argv[1] != NULL) 581 putchar(' '); 582 } 583 } else if (longfmt || !pgrep) 584 printf("%d %s", (int)kp->ki_pid, kp->ki_comm); 585 else 586 printf("%d", (int)kp->ki_pid); 587 } 588 589 static int 590 killact(const struct kinfo_proc *kp) 591 { 592 int ch, first; 593 594 if (interactive) { 595 /* 596 * Be careful, ask before killing. 597 */ 598 printf("kill "); 599 show_process(kp); 600 printf("? "); 601 fflush(stdout); 602 first = ch = getchar(); 603 while (ch != '\n' && ch != EOF) 604 ch = getchar(); 605 if (first != 'y' && first != 'Y') 606 return (1); 607 } 608 if (kill(kp->ki_pid, signum) == -1) { 609 /* 610 * Check for ESRCH, which indicates that the process 611 * disappeared between us matching it and us 612 * signalling it; don't issue a warning about it. 613 */ 614 if (errno != ESRCH) 615 warn("signalling pid %d", (int)kp->ki_pid); 616 /* 617 * Return 0 to indicate that the process should not be 618 * considered a match, since we didn't actually get to 619 * signal it. 620 */ 621 return (0); 622 } 623 return (1); 624 } 625 626 static int 627 grepact(const struct kinfo_proc *kp) 628 { 629 630 show_process(kp); 631 if (!quiet) 632 printf("%s", delim); 633 return (1); 634 } 635 636 static void 637 makelist(struct listhead *head, enum listtype type, char *src) 638 { 639 struct list *li; 640 struct passwd *pw; 641 struct group *gr; 642 struct stat st; 643 const char *cp; 644 char *sp, *ep, buf[MAXPATHLEN]; 645 int empty; 646 647 empty = 1; 648 649 while ((sp = strsep(&src, ",")) != NULL) { 650 if (*sp == '\0') 651 usage(); 652 653 if ((li = malloc(sizeof(*li))) == NULL) { 654 err(STATUS_ERROR, "Cannot allocate %zu bytes", 655 sizeof(*li)); 656 } 657 658 SLIST_INSERT_HEAD(head, li, li_chain); 659 empty = 0; 660 661 li->li_number = (uid_t)strtol(sp, &ep, 0); 662 if (*ep == '\0') { 663 switch (type) { 664 case LT_PGRP: 665 if (li->li_number == 0) 666 li->li_number = getpgrp(); 667 break; 668 case LT_SID: 669 if (li->li_number == 0) 670 li->li_number = getsid(mypid); 671 break; 672 case LT_JID: 673 if (li->li_number < 0) 674 errx(STATUS_BADUSAGE, 675 "Negative jail ID `%s'", sp); 676 /* For compatibility with old -j */ 677 if (li->li_number == 0) 678 li->li_number = -1; /* any jail */ 679 break; 680 case LT_TTY: 681 if (li->li_number < 0) 682 errx(STATUS_BADUSAGE, 683 "Negative /dev/pts tty `%s'", sp); 684 snprintf(buf, sizeof(buf), _PATH_DEV "pts/%s", 685 sp); 686 if (stat(buf, &st) != -1) 687 goto foundtty; 688 if (errno == ENOENT) 689 errx(STATUS_BADUSAGE, "No such tty: `" 690 _PATH_DEV "pts/%s'", sp); 691 err(STATUS_ERROR, "Cannot access `" 692 _PATH_DEV "pts/%s'", sp); 693 break; 694 default: 695 break; 696 } 697 continue; 698 } 699 700 switch (type) { 701 case LT_USER: 702 if ((pw = getpwnam(sp)) == NULL) 703 errx(STATUS_BADUSAGE, "Unknown user `%s'", sp); 704 li->li_number = pw->pw_uid; 705 break; 706 case LT_GROUP: 707 if ((gr = getgrnam(sp)) == NULL) 708 errx(STATUS_BADUSAGE, "Unknown group `%s'", sp); 709 li->li_number = gr->gr_gid; 710 break; 711 case LT_TTY: 712 if (strcmp(sp, "-") == 0) { 713 li->li_number = -1; 714 break; 715 } else if (strcmp(sp, "co") == 0) { 716 cp = "console"; 717 } else { 718 cp = sp; 719 } 720 721 snprintf(buf, sizeof(buf), _PATH_DEV "%s", cp); 722 if (stat(buf, &st) != -1) 723 goto foundtty; 724 725 snprintf(buf, sizeof(buf), _PATH_DEV "tty%s", cp); 726 if (stat(buf, &st) != -1) 727 goto foundtty; 728 729 if (errno == ENOENT) 730 errx(STATUS_BADUSAGE, "No such tty: `%s'", sp); 731 err(STATUS_ERROR, "Cannot access `%s'", sp); 732 733 foundtty: if ((st.st_mode & S_IFCHR) == 0) 734 errx(STATUS_BADUSAGE, "Not a tty: `%s'", sp); 735 736 li->li_number = st.st_rdev; 737 break; 738 case LT_JID: 739 if (strcmp(sp, "none") == 0) 740 li->li_number = 0; 741 else if (strcmp(sp, "any") == 0) 742 li->li_number = -1; 743 else if (*ep != '\0') 744 errx(STATUS_BADUSAGE, 745 "Invalid jail ID `%s'", sp); 746 break; 747 default: 748 usage(); 749 } 750 } 751 752 if (empty) 753 usage(); 754 } 755 756 static int 757 takepid(const char *pidfile, int pidfilelock) 758 { 759 char *endp, line[BUFSIZ]; 760 FILE *fh; 761 long rval; 762 763 fh = fopen(pidfile, "r"); 764 if (fh == NULL) 765 err(STATUS_ERROR, "Cannot open pidfile `%s'", pidfile); 766 767 if (pidfilelock) { 768 /* 769 * If we can lock pidfile, this means that daemon is not 770 * running, so would be better not to kill some random process. 771 */ 772 if (flock(fileno(fh), LOCK_EX | LOCK_NB) == 0) { 773 (void)fclose(fh); 774 errx(STATUS_ERROR, "File '%s' can be locked", pidfile); 775 } else { 776 if (errno != EWOULDBLOCK) { 777 errx(STATUS_ERROR, 778 "Error while locking file '%s'", pidfile); 779 } 780 } 781 } 782 783 if (fgets(line, sizeof(line), fh) == NULL) { 784 if (feof(fh)) { 785 (void)fclose(fh); 786 errx(STATUS_ERROR, "Pidfile `%s' is empty", pidfile); 787 } 788 (void)fclose(fh); 789 err(STATUS_ERROR, "Cannot read from pid file `%s'", pidfile); 790 } 791 (void)fclose(fh); 792 793 rval = strtol(line, &endp, 10); 794 if (*endp != '\0' && !isspace((unsigned char)*endp)) 795 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile); 796 else if (rval < MIN_PID || rval > MAX_PID) 797 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile); 798 return (rval); 799 } 800