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 * $FreeBSD: head/bin/pkill/pkill.c 256050 2013-10-04 16:08:44Z trasz $ 33 */ 34 35 #include <sys/user.h> 36 #include <sys/types.h> 37 #include <sys/param.h> 38 #include <sys/sysctl.h> 39 #include <sys/queue.h> 40 #include <sys/stat.h> 41 #include <sys/fcntl.h> 42 #include <sys/time.h> 43 44 #include <assert.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <limits.h> 48 #include <paths.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include <signal.h> 52 #include <regex.h> 53 #include <ctype.h> 54 #include <kvm.h> 55 #include <err.h> 56 #include <pwd.h> 57 #include <grp.h> 58 #include <errno.h> 59 #include <locale.h> 60 61 #define STATUS_MATCH 0 62 #define STATUS_NOMATCH 1 63 #define STATUS_BADUSAGE 2 64 #define STATUS_ERROR 3 65 66 #define MIN_PID 5 67 #define MAX_PID PID_MAX 68 69 /* Ignore system-processes (if '-S' flag is not specified) and myself. */ 70 #define PSKIP(kp) ((kp)->kp_pid == mypid || \ 71 (!kthreads && (kp)->kp_pid <= 0)) 72 73 enum listtype { 74 LT_GENERIC, 75 LT_USER, 76 LT_GROUP, 77 LT_TTY, 78 LT_PGRP, 79 LT_JID, 80 LT_SID, 81 LT_CLASS 82 }; 83 84 struct list { 85 SLIST_ENTRY(list) li_chain; 86 long li_number; 87 char *li_name; 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 static struct listhead classlist = SLIST_HEAD_INITIALIZER(classlist); 120 121 static void usage(void) __attribute__((__noreturn__)); 122 static int killact(const struct kinfo_proc *); 123 static int grepact(const struct kinfo_proc *); 124 static void makelist(struct listhead *, enum listtype, char *); 125 static int takepid(const char *, int); 126 127 int 128 main(int argc, char **argv) 129 { 130 char buf[_POSIX2_LINE_MAX], *mstr, **pargv, *p, *q, *pidfile, *tdev; 131 const char *execf, *coref; 132 int ancestors, debug_opt, did_action; 133 int i, ch, bestidx, rv, criteria, pidfromfile, pidfilelock; 134 size_t jsz; 135 int (*action)(const struct kinfo_proc *); 136 struct kinfo_proc *kp; 137 struct list *li; 138 struct timeval best_tval; 139 regex_t reg; 140 regmatch_t regmatch; 141 pid_t pid; 142 143 setlocale(LC_ALL, ""); 144 145 if (strcmp(getprogname(), "pgrep") == 0) { 146 action = grepact; 147 pgrep = 1; 148 } else { 149 action = killact; 150 p = argv[1]; 151 152 if (argc > 1 && p[0] == '-') { 153 p++; 154 i = (int)strtol(p, &q, 10); 155 if (*q == '\0') { 156 signum = i; 157 argv++; 158 argc--; 159 } else { 160 if (strncasecmp(p, "SIG", 3) == 0) 161 p += 3; 162 for (i = 1; i < NSIG; i++) 163 if (strcasecmp(sys_signame[i], p) == 0) 164 break; 165 if (i != NSIG) { 166 signum = i; 167 argv++; 168 argc--; 169 } 170 } 171 } 172 } 173 174 ancestors = 0; 175 criteria = 0; 176 debug_opt = 0; 177 pidfile = NULL; 178 pidfilelock = 0; 179 quiet = 0; 180 execf = NULL; 181 coref = _PATH_DEVNULL; 182 183 while ((ch = getopt(argc, argv, "DF:G:ILM:N:P:STU:ac:d:fg:ij:lnoqs:t:u:vx")) != -1) { 184 switch (ch) { 185 case 'D': 186 debug_opt++; 187 break; 188 case 'F': 189 pidfile = optarg; 190 criteria = 1; 191 break; 192 case 'G': 193 makelist(&rgidlist, LT_GROUP, optarg); 194 criteria = 1; 195 break; 196 case 'I': 197 if (pgrep) 198 usage(); 199 interactive = 1; 200 break; 201 case 'L': 202 pidfilelock = 1; 203 break; 204 case 'M': 205 coref = optarg; 206 break; 207 case 'N': 208 execf = optarg; 209 break; 210 case 'P': 211 makelist(&ppidlist, LT_GENERIC, optarg); 212 criteria = 1; 213 break; 214 case 'S': 215 if (!pgrep) 216 usage(); 217 kthreads = 1; 218 break; 219 case 'T': 220 tdev = ttyname(0); 221 if (tdev == NULL) 222 err(STATUS_ERROR, "Not a terminal"); 223 if ((tdev = strdup(tdev)) == NULL) 224 err(STATUS_ERROR, "Cannot allocate memory"); 225 makelist(&tdevlist, LT_TTY, tdev); 226 criteria = 1; 227 break; 228 case 'U': 229 makelist(&ruidlist, LT_USER, optarg); 230 criteria = 1; 231 break; 232 case 'a': 233 ancestors++; 234 break; 235 case 'c': 236 makelist(&classlist, LT_CLASS, optarg); 237 criteria = 1; 238 break; 239 case 'd': 240 if (!pgrep) 241 usage(); 242 delim = optarg; 243 break; 244 case 'f': 245 matchargs = 1; 246 break; 247 case 'g': 248 makelist(&pgrplist, LT_PGRP, optarg); 249 criteria = 1; 250 break; 251 case 'i': 252 cflags |= REG_ICASE; 253 break; 254 case 'j': 255 makelist(&jidlist, LT_JID, optarg); 256 criteria = 1; 257 break; 258 case 'l': 259 longfmt = 1; 260 break; 261 case 'n': 262 newest = 1; 263 criteria = 1; 264 break; 265 case 'o': 266 oldest = 1; 267 criteria = 1; 268 break; 269 case 'q': 270 if (!pgrep) 271 usage(); 272 quiet = 1; 273 break; 274 case 's': 275 makelist(&sidlist, LT_SID, optarg); 276 criteria = 1; 277 break; 278 case 't': 279 makelist(&tdevlist, LT_TTY, optarg); 280 criteria = 1; 281 break; 282 case 'u': 283 makelist(&euidlist, LT_USER, optarg); 284 criteria = 1; 285 break; 286 case 'v': 287 inverse = 1; 288 break; 289 case 'x': 290 fullmatch = 1; 291 break; 292 default: 293 usage(); 294 /* NOTREACHED */ 295 } 296 } 297 298 argc -= optind; 299 argv += optind; 300 if (argc != 0) 301 criteria = 1; 302 if (!criteria) 303 usage(); 304 if (newest && oldest) 305 errx(STATUS_ERROR, "Options -n and -o are mutually exclusive"); 306 if (pidfile != NULL) 307 pidfromfile = takepid(pidfile, pidfilelock); 308 else { 309 if (pidfilelock) { 310 errx(STATUS_ERROR, 311 "Option -L doesn't make sense without -F"); 312 } 313 pidfromfile = -1; 314 } 315 316 mypid = getpid(); 317 318 /* 319 * Retrieve the list of running processes from the kernel. 320 */ 321 kd = kvm_openfiles(execf, coref, NULL, O_RDONLY, buf); 322 if (kd == NULL) 323 errx(STATUS_ERROR, "Cannot open kernel files (%s)", buf); 324 325 if (pidfromfile >= 0) 326 plist = kvm_getprocs(kd, KERN_PROC_PID, pidfromfile, &nproc); 327 else 328 plist = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nproc); 329 if (plist == NULL) { 330 errx(STATUS_ERROR, "Cannot get process list (%s)", 331 kvm_geterr(kd)); 332 } 333 334 /* 335 * Allocate memory which will be used to keep track of the 336 * selection. 337 */ 338 if ((selected = malloc(nproc)) == NULL) { 339 err(STATUS_ERROR, "Cannot allocate memory for %d processes", 340 nproc); 341 } 342 memset(selected, 0, nproc); 343 344 /* 345 * Refine the selection. 346 */ 347 for (; *argv != NULL; argv++) { 348 if ((rv = regcomp(®, *argv, cflags)) != 0) { 349 regerror(rv, ®, buf, sizeof(buf)); 350 errx(STATUS_BADUSAGE, 351 "Cannot compile regular expression `%s' (%s)", 352 *argv, buf); 353 } 354 355 for (i = 0, kp = plist; i < nproc; i++, kp++) { 356 if (PSKIP(kp)) { 357 if (debug_opt > 0) 358 fprintf(stderr, "* Skipped %5d %3d %s\n", 359 kp->kp_pid, kp->kp_uid, kp->kp_comm); 360 continue; 361 } 362 363 if (matchargs && 364 (pargv = kvm_getargv(kd, kp, 0)) != NULL) { 365 jsz = 0; 366 while (jsz < sizeof(buf) && *pargv != NULL) { 367 jsz += snprintf(buf + jsz, 368 sizeof(buf) - jsz, 369 pargv[1] != NULL ? "%s " : "%s", 370 pargv[0]); 371 pargv++; 372 } 373 mstr = buf; 374 } else 375 mstr = kp->kp_comm; 376 377 rv = regexec(®, mstr, 1, ®match, 0); 378 if (rv == 0) { 379 if (fullmatch) { 380 if (regmatch.rm_so == 0 && 381 regmatch.rm_eo == 382 (off_t)strlen(mstr)) 383 selected[i] = 1; 384 } else 385 selected[i] = 1; 386 } else if (rv != REG_NOMATCH) { 387 regerror(rv, ®, buf, sizeof(buf)); 388 errx(STATUS_ERROR, 389 "Regular expression evaluation error (%s)", 390 buf); 391 } 392 if (debug_opt > 1) { 393 const char *rv_res = "NoMatch"; 394 if (selected[i]) 395 rv_res = "Matched"; 396 fprintf(stderr, "* %s %5d %3d %s\n", rv_res, 397 kp->kp_pid, kp->kp_uid, mstr); 398 } 399 } 400 401 regfree(®); 402 } 403 404 for (i = 0, kp = plist; i < nproc; i++, kp++) { 405 if (PSKIP(kp)) 406 continue; 407 408 if (pidfromfile >= 0 && kp->kp_pid != pidfromfile) { 409 selected[i] = 0; 410 continue; 411 } 412 413 SLIST_FOREACH(li, &ruidlist, li_chain) 414 if (kp->kp_ruid == (uid_t)li->li_number) 415 break; 416 if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) { 417 selected[i] = 0; 418 continue; 419 } 420 421 SLIST_FOREACH(li, &rgidlist, li_chain) 422 if (kp->kp_rgid == (gid_t)li->li_number) 423 break; 424 if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) { 425 selected[i] = 0; 426 continue; 427 } 428 429 SLIST_FOREACH(li, &euidlist, li_chain) 430 if (kp->kp_uid == (uid_t)li->li_number) 431 break; 432 if (SLIST_FIRST(&euidlist) != NULL && li == NULL) { 433 selected[i] = 0; 434 continue; 435 } 436 437 SLIST_FOREACH(li, &ppidlist, li_chain) 438 if (kp->kp_ppid == (pid_t)li->li_number) 439 break; 440 if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) { 441 selected[i] = 0; 442 continue; 443 } 444 445 SLIST_FOREACH(li, &pgrplist, li_chain) 446 if (kp->kp_pgid == (pid_t)li->li_number) 447 break; 448 if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) { 449 selected[i] = 0; 450 continue; 451 } 452 453 SLIST_FOREACH(li, &tdevlist, li_chain) { 454 if (li->li_number == -1 && 455 (kp->kp_flags & P_CONTROLT) == 0) 456 break; 457 if (kp->kp_tdev == (dev_t)li->li_number) 458 break; 459 } 460 if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) { 461 selected[i] = 0; 462 continue; 463 } 464 465 SLIST_FOREACH(li, &sidlist, li_chain) 466 if (kp->kp_sid == (pid_t)li->li_number) 467 break; 468 if (SLIST_FIRST(&sidlist) != NULL && li == NULL) { 469 selected[i] = 0; 470 continue; 471 } 472 473 SLIST_FOREACH(li, &jidlist, li_chain) { 474 /* A particular jail ID, including 0 (not in jail) */ 475 if (kp->kp_jailid == (int)li->li_number) 476 break; 477 /* Any jail */ 478 if (kp->kp_jailid > 0 && li->li_number == -1) 479 break; 480 } 481 if (SLIST_FIRST(&jidlist) != NULL && li == NULL) { 482 selected[i] = 0; 483 continue; 484 } 485 486 SLIST_FOREACH(li, &classlist, li_chain) { 487 /* 488 * We skip P_SYSTEM processes to match ps(1) output. 489 */ 490 if ((kp->kp_flags & P_SYSTEM) == 0) 491 break; 492 } 493 if (SLIST_FIRST(&classlist) != NULL && li == NULL) { 494 selected[i] = 0; 495 continue; 496 } 497 498 if (argc == 0) 499 selected[i] = 1; 500 } 501 502 if (!ancestors) { 503 pid = mypid; 504 while (pid) { 505 for (i = 0, kp = plist; i < nproc; i++, kp++) { 506 if (PSKIP(kp)) 507 continue; 508 if (kp->kp_pid == pid) { 509 selected[i] = 0; 510 pid = kp->kp_ppid; 511 break; 512 } 513 } 514 if (i == nproc) { 515 if (pid == mypid) 516 pid = getppid(); 517 else 518 break; /* Maybe we're in a jail ? */ 519 } 520 } 521 } 522 523 if (newest || oldest) { 524 best_tval.tv_sec = 0; 525 best_tval.tv_usec = 0; 526 bestidx = -1; 527 528 for (i = 0, kp = plist; i < nproc; i++, kp++) { 529 if (!selected[i]) 530 continue; 531 if (bestidx == -1) { 532 /* The first entry of the list which matched. */ 533 ; 534 } else if (timercmp(&kp->kp_start, &best_tval, >)) { 535 /* This entry is newer than previous "best". */ 536 if (oldest) /* but we want the oldest */ 537 continue; 538 } else { 539 /* This entry is older than previous "best". */ 540 if (newest) /* but we want the newest */ 541 continue; 542 } 543 /* This entry is better than previous "best" entry. */ 544 best_tval.tv_sec = kp->kp_start.tv_sec; 545 best_tval.tv_usec = kp->kp_start.tv_usec; 546 bestidx = i; 547 } 548 549 memset(selected, 0, nproc); 550 if (bestidx != -1) 551 selected[bestidx] = 1; 552 } 553 554 /* 555 * Take the appropriate action for each matched process, if any. 556 */ 557 did_action = 0; 558 for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) { 559 if (PSKIP(kp)) 560 continue; 561 if (selected[i]) { 562 if (longfmt && !pgrep) { 563 did_action = 1; 564 printf("kill -%d %d\n", signum, kp->kp_pid); 565 } 566 if (inverse) 567 continue; 568 } else if (!inverse) 569 continue; 570 rv |= (*action)(kp); 571 } 572 if (!did_action && !pgrep && longfmt) 573 fprintf(stderr, 574 "No matching processes belonging to you were found\n"); 575 576 exit(rv ? STATUS_MATCH : STATUS_NOMATCH); 577 } 578 579 static void 580 usage(void) 581 { 582 const char *ustr; 583 584 if (pgrep) 585 ustr = "[-LSTfilnoqvx] [-d delim]"; 586 else 587 ustr = "[-signal] [-ILTfilnovx]"; 588 589 fprintf(stderr, 590 "usage: %s %s [-F pidfile] [-G gid] [-M core] [-N system]\n" 591 " [-P ppid] [-U uid] [-c class] [-g pgrp] [-j jid]\n" 592 " [-s sid] [-t tty] [-u euid] pattern ...\n", 593 getprogname(), ustr); 594 595 exit(STATUS_BADUSAGE); 596 } 597 598 static void 599 show_process(const struct kinfo_proc *kp) 600 { 601 char **argv; 602 603 if (quiet) { 604 assert(pgrep); 605 return; 606 } 607 if ((longfmt || !pgrep) && matchargs && 608 (argv = kvm_getargv(kd, kp, 0)) != NULL) { 609 printf("%d ", (int)kp->kp_pid); 610 for (; *argv != NULL; argv++) { 611 printf("%s", *argv); 612 if (argv[1] != NULL) 613 putchar(' '); 614 } 615 } else if (longfmt || !pgrep) 616 printf("%d %s", (int)kp->kp_pid, kp->kp_comm); 617 else 618 printf("%d", (int)kp->kp_pid); 619 } 620 621 static int 622 killact(const struct kinfo_proc *kp) 623 { 624 int ch, first; 625 626 if (interactive) { 627 /* 628 * Be careful, ask before killing. 629 */ 630 printf("kill "); 631 show_process(kp); 632 printf("? "); 633 fflush(stdout); 634 first = ch = getchar(); 635 while (ch != '\n' && ch != EOF) 636 ch = getchar(); 637 if (first != 'y' && first != 'Y') 638 return (1); 639 } 640 if (kill(kp->kp_pid, signum) == -1) { 641 /* 642 * Check for ESRCH, which indicates that the process 643 * disappeared between us matching it and us 644 * signalling it; don't issue a warning about it. 645 */ 646 if (errno != ESRCH) 647 warn("signalling pid %d", (int)kp->kp_pid); 648 /* 649 * Return 0 to indicate that the process should not be 650 * considered a match, since we didn't actually get to 651 * signal it. 652 */ 653 return (0); 654 } 655 return (1); 656 } 657 658 static int 659 grepact(const struct kinfo_proc *kp) 660 { 661 662 show_process(kp); 663 if (!quiet) 664 printf("%s", delim); 665 return (1); 666 } 667 668 static void 669 makelist(struct listhead *head, enum listtype type, char *src) 670 { 671 struct list *li; 672 struct passwd *pw; 673 struct group *gr; 674 struct stat st; 675 const char *cp; 676 char *sp, *ep, buf[MAXPATHLEN]; 677 int empty; 678 679 empty = 1; 680 681 while ((sp = strsep(&src, ",")) != NULL) { 682 if (*sp == '\0') 683 usage(); 684 685 if ((li = malloc(sizeof(*li))) == NULL) { 686 err(STATUS_ERROR, "Cannot allocate %zu bytes", 687 sizeof(*li)); 688 } 689 690 SLIST_INSERT_HEAD(head, li, li_chain); 691 empty = 0; 692 693 if (type != LT_CLASS) 694 li->li_number = (uid_t)strtol(sp, &ep, 0); 695 696 if (type != LT_CLASS && *ep == '\0') { 697 switch (type) { 698 case LT_PGRP: 699 if (li->li_number == 0) 700 li->li_number = getpgrp(); 701 break; 702 case LT_SID: 703 if (li->li_number == 0) 704 li->li_number = getsid(mypid); 705 break; 706 case LT_JID: 707 if (li->li_number < 0) 708 errx(STATUS_BADUSAGE, 709 "Negative jail ID `%s'", sp); 710 /* For compatibility with old -j */ 711 if (li->li_number == 0) 712 li->li_number = -1; /* any jail */ 713 break; 714 case LT_TTY: 715 if (li->li_number < 0) 716 errx(STATUS_BADUSAGE, 717 "Negative /dev/pts tty `%s'", sp); 718 snprintf(buf, sizeof(buf), _PATH_DEV "pts/%s", 719 sp); 720 if (stat(buf, &st) != -1) 721 goto foundtty; 722 if (errno == ENOENT) 723 errx(STATUS_BADUSAGE, "No such tty: `" 724 _PATH_DEV "pts/%s'", sp); 725 err(STATUS_ERROR, "Cannot access `" 726 _PATH_DEV "pts/%s'", sp); 727 break; 728 default: 729 break; 730 } 731 continue; 732 } 733 734 switch (type) { 735 case LT_USER: 736 if ((pw = getpwnam(sp)) == NULL) 737 errx(STATUS_BADUSAGE, "Unknown user `%s'", sp); 738 li->li_number = pw->pw_uid; 739 break; 740 case LT_GROUP: 741 if ((gr = getgrnam(sp)) == NULL) 742 errx(STATUS_BADUSAGE, "Unknown group `%s'", sp); 743 li->li_number = gr->gr_gid; 744 break; 745 case LT_TTY: 746 if (strcmp(sp, "-") == 0) { 747 li->li_number = -1; 748 break; 749 } else if (strcmp(sp, "co") == 0) { 750 cp = "console"; 751 } else { 752 cp = sp; 753 } 754 755 if (strncmp(cp, _PATH_DEV, sizeof(_PATH_DEV)-1) == 0 && 756 stat(cp, &st) != -1) { 757 goto foundtty; 758 } 759 760 snprintf(buf, sizeof(buf), _PATH_DEV "%s", cp); 761 if (stat(buf, &st) != -1) 762 goto foundtty; 763 764 snprintf(buf, sizeof(buf), _PATH_DEV "tty%s", cp); 765 if (stat(buf, &st) != -1) 766 goto foundtty; 767 768 if (errno == ENOENT) 769 errx(STATUS_BADUSAGE, "No such tty: `%s'", sp); 770 err(STATUS_ERROR, "Cannot access `%s'", sp); 771 772 foundtty: if ((st.st_mode & S_IFCHR) == 0) 773 errx(STATUS_BADUSAGE, "Not a tty: `%s'", sp); 774 775 li->li_number = st.st_rdev; 776 break; 777 case LT_JID: 778 if (strcmp(sp, "none") == 0) 779 li->li_number = 0; 780 else if (strcmp(sp, "any") == 0) 781 li->li_number = -1; 782 else if (*ep != '\0') 783 errx(STATUS_BADUSAGE, 784 "Invalid jail ID `%s'", sp); 785 break; 786 case LT_CLASS: 787 li->li_number = -1; 788 li->li_name = strdup(sp); 789 if (li->li_name == NULL) 790 err(STATUS_ERROR, "Cannot allocate memory"); 791 break; 792 default: 793 usage(); 794 } 795 } 796 797 if (empty) 798 usage(); 799 } 800 801 static int 802 takepid(const char *pidfile, int pidfilelock) 803 { 804 char *endp, line[BUFSIZ]; 805 FILE *fh; 806 long rval; 807 808 fh = fopen(pidfile, "r"); 809 if (fh == NULL) 810 err(STATUS_ERROR, "Cannot open pidfile `%s'", pidfile); 811 812 if (pidfilelock) { 813 /* 814 * If we can lock pidfile, this means that daemon is not 815 * running, so would be better not to kill some random process. 816 */ 817 if (flock(fileno(fh), LOCK_EX | LOCK_NB) == 0) { 818 (void)fclose(fh); 819 errx(STATUS_ERROR, "File '%s' can be locked", pidfile); 820 } else { 821 if (errno != EWOULDBLOCK) { 822 errx(STATUS_ERROR, 823 "Error while locking file '%s'", pidfile); 824 } 825 } 826 } 827 828 if (fgets(line, sizeof(line), fh) == NULL) { 829 if (feof(fh)) { 830 (void)fclose(fh); 831 errx(STATUS_ERROR, "Pidfile `%s' is empty", pidfile); 832 } 833 (void)fclose(fh); 834 err(STATUS_ERROR, "Cannot read from pid file `%s'", pidfile); 835 } 836 (void)fclose(fh); 837 838 rval = strtol(line, &endp, 10); 839 if (*endp != '\0' && !isspace((unsigned char)*endp)) 840 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile); 841 else if (rval < MIN_PID || rval > MAX_PID) 842 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile); 843 return (rval); 844 } 845