adv_cmds/pkill/pkill.c

   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: src/bin/pkill/pkill.c,v 1.12 2011/02/04 16:40:50 jilles Exp $");
  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 #ifndef __APPLE__
  57 #include <kvm.h>
  58 #endif
  59 #include <err.h>
  60 #include <pwd.h>
  61 #include <grp.h>
  62 #include <errno.h>
  63 #include <locale.h>
  64
  65 #ifdef __APPLE__
  66 #include <xpc/xpc.h>
  67 #include <sys/proc_info.h>
  68 #include <os/assumes.h>
  69 #include <sysmon.h>
  70 #endif
  71
  72 #define STATUS_MATCH    0
  73 #define STATUS_NOMATCH  1
  74 #define STATUS_BADUSAGE 2
  75 #define STATUS_ERROR    3
  76
  77 #define MIN_PID 5
  78 #define MAX_PID 99999
  79
  80 #ifdef __APPLE__
  81 /* Ignore system processes and myself. */
  82 #define PSKIP(kp)       ((pid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PID)) == mypid ||                        \
  83                          ((xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_FLAGS)) & PROC_FLAG_SYSTEM) != 0))
  84 #else
  85 /* Ignore system-processes (if '-S' flag is not specified) and myself. */
  86 #define PSKIP(kp)       ((kp)->ki_pid == mypid ||                       \
  87                          (!kthreads && ((kp)->ki_flag & P_KTHREAD) != 0))
  88 #endif
  89
  90 enum listtype {
  91         LT_GENERIC,
  92         LT_USER,
  93         LT_GROUP,
  94         LT_TTY,
  95         LT_PGRP,
  96 #ifndef __APPLE__
  97         LT_JID,
  98 #endif
  99         LT_SID
 100 };
 101
 102 struct list {
 103         SLIST_ENTRY(list) li_chain;
 104         long    li_number;
 105 };
 106
 107 SLIST_HEAD(listhead, list);
 108
 109 #ifdef __APPLE__
 110 static sysmon_table_t plist;
 111 #else
 112 static struct kinfo_proc *plist;
 113 #endif
 114 static char     *selected;
 115 static const char *delim = "\n";
 116 static int      nproc;
 117 static int      pgrep;
 118 static int      signum = SIGTERM;
 119 static int      newest;
 120 static int      oldest;
 121 static int      interactive;
 122 static int      inverse;
 123 static int      longfmt;
 124 static int      matchargs;
 125 static int      fullmatch;
 126 #ifndef __APPLE__
 127 static int      kthreads;
 128 #endif
 129 static int      cflags = REG_EXTENDED;
 130 static int      quiet;
 131 #ifndef __APPLE__
 132 static kvm_t    *kd;
 133 #endif
 134 static pid_t    mypid;
 135
 136 static struct listhead euidlist = SLIST_HEAD_INITIALIZER(euidlist);
 137 static struct listhead ruidlist = SLIST_HEAD_INITIALIZER(ruidlist);
 138 static struct listhead rgidlist = SLIST_HEAD_INITIALIZER(rgidlist);
 139 static struct listhead pgrplist = SLIST_HEAD_INITIALIZER(pgrplist);
 140 static struct listhead ppidlist = SLIST_HEAD_INITIALIZER(ppidlist);
 141 static struct listhead tdevlist = SLIST_HEAD_INITIALIZER(tdevlist);
 142 #ifndef __APPLE__
 143 static struct listhead sidlist = SLIST_HEAD_INITIALIZER(sidlist);
 144 static struct listhead jidlist = SLIST_HEAD_INITIALIZER(jidlist);
 145 #endif
 146
 147 static void     usage(void) __attribute__((__noreturn__));
 148 #ifdef __APPLE__
 149 static int      killact(const sysmon_row_t);
 150 static int      grepact(const sysmon_row_t);
 151 #else
 152 static int      killact(const struct kinfo_proc *);
 153 static int      grepact(const struct kinfo_proc *);
 154 #endif
 155 static void     makelist(struct listhead *, enum listtype, char *);
 156 static int      takepid(const char *, int);
 157
 158 #ifdef __APPLE__
 159 static sysmon_table_t
 160 copy_process_info(void)
 161 {
 162         dispatch_semaphore_t sema;
 163         sysmon_request_t request;
 164         __block sysmon_table_t result = NULL;
 165
 166         sema = dispatch_semaphore_create(0);
 167         request = sysmon_request_create_with_error(SYSMON_REQUEST_TYPE_PROCESS, ^(sysmon_table_t table, const char *error_str) {
 168                 if (table) {
 169                         result = sysmon_retain(table);
 170                 } else {
 171                         fprintf(stderr, "sysmon request failed with error: %s\n", error_str);
 172                 }
 173                 dispatch_semaphore_signal(sema);
 174         });
 175         sysmon_request_add_attribute(request, SYSMON_ATTR_PROC_PID);
 176         sysmon_request_add_attribute(request, SYSMON_ATTR_PROC_FLAGS);
 177         sysmon_request_add_attribute(request, SYSMON_ATTR_PROC_UID);
 178         sysmon_request_add_attribute(request, SYSMON_ATTR_PROC_COMM);
 179         sysmon_request_add_attribute(request, SYSMON_ATTR_PROC_ARGUMENTS);
 180         sysmon_request_add_attribute(request, SYSMON_ATTR_PROC_RUID);
 181         sysmon_request_add_attribute(request, SYSMON_ATTR_PROC_RGID);
 182         sysmon_request_add_attribute(request, SYSMON_ATTR_PROC_PPID);
 183         sysmon_request_add_attribute(request, SYSMON_ATTR_PROC_PGID);
 184         sysmon_request_add_attribute(request, SYSMON_ATTR_PROC_TDEV);
 185         sysmon_request_add_attribute(request, SYSMON_ATTR_PROC_START);
 186         sysmon_request_execute(request);
 187         dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);
 188         dispatch_release(sema);
 189         sysmon_release(request);
 190
 191         return result;
 192 }
 193 #endif /* __APPLE__ */
 194
 195 int
 196 main(int argc, char **argv)
 197 {
 198 #ifdef __APPLE__
 199         char buf[_POSIX2_LINE_MAX], *bufp, *mstr, *p, *q, *pidfile;
 200         xpc_object_t pargv;
 201 #else
 202         char buf[_POSIX2_LINE_MAX], *mstr, **pargv, *p, *q, *pidfile;
 203         const char *execf, *coref;
 204 #endif
 205         int ancestors, debug_opt, did_action;
 206         int i, ch, bestidx, rv, criteria, pidfromfile, pidfilelock;
 207 #ifdef __APPLE__
 208         __block size_t jsz;
 209         int (*action)(const sysmon_row_t);
 210         sysmon_row_t kp;
 211 #else
 212         size_t jsz;
 213         int (*action)(const struct kinfo_proc *);
 214         struct kinfo_proc *kp;
 215 #endif
 216         struct list *li;
 217 #ifdef __APPLE__
 218         int64_t best_tval;
 219 #else
 220         struct timeval best_tval;
 221 #endif
 222         regex_t reg;
 223         regmatch_t regmatch;
 224         pid_t pid;
 225
 226         setlocale(LC_ALL, "");
 227
 228         if (strcmp(getprogname(), "pgrep") == 0) {
 229                 action = grepact;
 230                 pgrep = 1;
 231         } else {
 232                 action = killact;
 233                 p = argv[1];
 234
 235                 if (argc > 1 && p[0] == '-') {
 236                         p++;
 237                         i = (int)strtol(p, &q, 10);
 238                         if (*q == '\0') {
 239                                 signum = i;
 240                                 argv++;
 241                                 argc--;
 242                         } else {
 243                                 if (strncasecmp(p, "SIG", 3) == 0)
 244                                         p += 3;
 245                                 for (i = 1; i < NSIG; i++)
 246                                         if (strcasecmp(sys_signame[i], p) == 0)
 247                                                 break;
 248                                 if (i != NSIG) {
 249                                         signum = i;
 250                                         argv++;
 251                                         argc--;
 252                                 }
 253                         }
 254                 }
 255         }
 256
 257         ancestors = 0;
 258         criteria = 0;
 259         debug_opt = 0;
 260         pidfile = NULL;
 261         pidfilelock = 0;
 262         quiet = 0;
 263 #ifndef __APPLE__
 264         execf = NULL;
 265         coref = _PATH_DEVNULL;
 266 #endif
 267
 268 #ifdef __APPLE__
 269         while ((ch = getopt(argc, argv, "DF:G:ILP:U:ad:fg:ilnoqt:u:vx")) != -1)
 270 #else
 271         while ((ch = getopt(argc, argv, "DF:G:ILM:N:P:SU:ad:fg:ij:lnoqs:t:u:vx")) != -1)
 272 #endif
 273                 switch (ch) {
 274                 case 'D':
 275                         debug_opt++;
 276                         break;
 277                 case 'F':
 278                         pidfile = optarg;
 279                         criteria = 1;
 280                         break;
 281                 case 'G':
 282                         makelist(&rgidlist, LT_GROUP, optarg);
 283                         criteria = 1;
 284                         break;
 285                 case 'I':
 286                         if (pgrep)
 287                                 usage();
 288                         interactive = 1;
 289                         break;
 290                 case 'L':
 291                         pidfilelock = 1;
 292                         break;
 293 #ifndef __APPLE__
 294                 case 'M':
 295                         coref = optarg;
 296                         break;
 297                 case 'N':
 298                         execf = optarg;
 299                         break;
 300 #endif
 301                 case 'P':
 302                         makelist(&ppidlist, LT_GENERIC, optarg);
 303                         criteria = 1;
 304                         break;
 305 #ifndef __APPLE__
 306                 case 'S':
 307                         if (!pgrep)
 308                                 usage();
 309                         kthreads = 1;
 310                         break;
 311 #endif
 312                 case 'U':
 313                         makelist(&ruidlist, LT_USER, optarg);
 314                         criteria = 1;
 315                         break;
 316                 case 'a':
 317                         ancestors++;
 318                         break;
 319                 case 'd':
 320                         if (!pgrep)
 321                                 usage();
 322                         delim = optarg;
 323                         break;
 324                 case 'f':
 325                         matchargs = 1;
 326                         break;
 327                 case 'g':
 328                         makelist(&pgrplist, LT_PGRP, optarg);
 329                         criteria = 1;
 330                         break;
 331                 case 'i':
 332                         cflags |= REG_ICASE;
 333                         break;
 334 #ifndef __APPLE__
 335                 case 'j':
 336                         makelist(&jidlist, LT_JID, optarg);
 337                         criteria = 1;
 338                         break;
 339 #endif
 340                 case 'l':
 341                         longfmt = 1;
 342                         break;
 343                 case 'n':
 344                         newest = 1;
 345                         criteria = 1;
 346                         break;
 347                 case 'o':
 348                         oldest = 1;
 349                         criteria = 1;
 350                         break;
 351                 case 'q':
 352                         if (!pgrep)
 353                                 usage();
 354                         quiet = 1;
 355                         break;
 356 #ifndef __APPLE__
 357                 case 's':
 358                         makelist(&sidlist, LT_SID, optarg);
 359                         criteria = 1;
 360                         break;
 361 #endif /* !__APPLE__ */
 362                 case 't':
 363                         makelist(&tdevlist, LT_TTY, optarg);
 364                         criteria = 1;
 365                         break;
 366                 case 'u':
 367                         makelist(&euidlist, LT_USER, optarg);
 368                         criteria = 1;
 369                         break;
 370                 case 'v':
 371                         inverse = 1;
 372                         break;
 373                 case 'x':
 374                         fullmatch = 1;
 375                         break;
 376                 default:
 377                         usage();
 378                         /* NOTREACHED */
 379                 }
 380
 381         argc -= optind;
 382         argv += optind;
 383         if (argc != 0)
 384                 criteria = 1;
 385         if (!criteria)
 386                 usage();
 387         if (newest && oldest)
 388                 errx(STATUS_ERROR, "Options -n and -o are mutually exclusive");
 389         if (pidfile != NULL)
 390                 pidfromfile = takepid(pidfile, pidfilelock);
 391         else {
 392                 if (pidfilelock) {
 393                         errx(STATUS_ERROR,
 394                             "Option -L doesn't make sense without -F");
 395                 }
 396                 pidfromfile = -1;
 397         }
 398
 399         mypid = getpid();
 400
 401 #ifdef __APPLE__
 402         plist = copy_process_info();
 403         if (plist == NULL) {
 404                 errx(STATUS_ERROR, "Cannot get process list");
 405         }
 406         nproc = sysmon_table_get_count(plist);
 407 #else
 408         /*
 409          * Retrieve the list of running processes from the kernel.
 410          */
 411         kd = kvm_openfiles(execf, coref, NULL, O_RDONLY, buf);
 412         if (kd == NULL)
 413                 errx(STATUS_ERROR, "Cannot open kernel files (%s)", buf);
 414
 415         /*
 416          * Use KERN_PROC_PROC instead of KERN_PROC_ALL, since we
 417          * just want processes and not individual kernel threads.
 418          */
 419         plist = kvm_getprocs(kd, KERN_PROC_PROC, 0, &nproc);
 420         if (plist == NULL) {
 421                 errx(STATUS_ERROR, "Cannot get process list (%s)",
 422                     kvm_geterr(kd));
 423         }
 424 #endif
 425
 426         /*
 427          * Allocate memory which will be used to keep track of the
 428          * selection.
 429          */
 430         if ((selected = malloc(nproc)) == NULL) {
 431                 err(STATUS_ERROR, "Cannot allocate memory for %d processes",
 432                     nproc);
 433         }
 434         memset(selected, 0, nproc);
 435
 436         /*
 437          * Refine the selection.
 438          */
 439         for (; *argv != NULL; argv++) {
 440                 if ((rv = regcomp(&reg, *argv, cflags)) != 0) {
 441                         regerror(rv, &reg, buf, sizeof(buf));
 442                         errx(STATUS_BADUSAGE,
 443                             "Cannot compile regular expression `%s' (%s)",
 444                             *argv, buf);
 445                 }
 446
 447 #ifdef __APPLE__
 448                 for (i = 0; i < nproc; i++) {
 449                         kp = sysmon_table_get_row(plist, i);
 450 #else
 451                 for (i = 0, kp = plist; i < nproc; i++, kp++) {
 452 #endif
 453                         if (PSKIP(kp)) {
 454                                 if (debug_opt > 0)
 455                                     fprintf(stderr, "* Skipped %5d %3d %s\n",
 456 #ifdef __APPLE__
 457                                         (pid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PID)),
 458                                         (uid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_UID)),
 459                                         xpc_string_get_string_ptr(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_COMM)));
 460 #else
 461                                         kp->ki_pid, kp->ki_uid, kp->ki_comm);
 462 #endif
 463                                 continue;
 464                         }
 465
 466 #ifdef __APPLE__
 467                         if (matchargs &&
 468                             (pargv = sysmon_row_get_value(kp, SYSMON_ATTR_PROC_ARGUMENTS)) != NULL) {
 469                                 jsz = 0;
 470                                 os_assert(sizeof(buf) == _POSIX2_LINE_MAX);
 471                                 bufp = buf;
 472                                 xpc_array_apply(pargv, ^(size_t index, xpc_object_t value) {
 473                                         if (jsz >= _POSIX2_LINE_MAX) {
 474                                                 return (bool)false;
 475                                         }
 476                                         jsz += snprintf(bufp + jsz,
 477                                             _POSIX2_LINE_MAX - jsz,
 478                                             index < xpc_array_get_count(pargv) - 1 ? "%s " : "%s",
 479                                             xpc_string_get_string_ptr(value));
 480                                         return (bool)true;
 481                                 });
 482 #else
 483                         if (matchargs &&
 484                             (pargv = kvm_getargv(kd, kp, 0)) != NULL) {
 485                                 jsz = 0;
 486                                 while (jsz < sizeof(buf) && *pargv != NULL) {
 487                                         jsz += snprintf(buf + jsz,
 488                                             sizeof(buf) - jsz,
 489                                             pargv[1] != NULL ? "%s " : "%s",
 490                                             pargv[0]);
 491                                         pargv++;
 492                                 }
 493 #endif
 494                                 mstr = buf;
 495                         } else
 496 #ifdef __APPLE__
 497                         {
 498                                 /*
 499                                  * comm is limited to 15 bytes (MAXCOMLEN - 1).
 500                                  * Try to use argv[0] (trimmed) if available.
 501                                  */
 502                                 mstr = NULL;
 503                                 pargv = sysmon_row_get_value(kp, SYSMON_ATTR_PROC_ARGUMENTS);
 504                                 if (pargv != NULL && xpc_array_get_count(pargv) > 0) {
 505                                         const char *tmp = xpc_array_get_string(pargv, 0);
 506                                         if (tmp != NULL) {
 507                                                 mstr = strrchr(tmp, '/');
 508                                                 if (mstr != NULL) {
 509                                                         mstr++;
 510                                                 } else {
 511                                                         mstr = (char *)tmp;
 512                                                 }
 513                                         }
 514                                 }
 515
 516                                 /* Fall back to "comm" if we failed to get argv[0]. */
 517                                 if (mstr == NULL || *mstr == '\0') {
 518                                         mstr = (char *)xpc_string_get_string_ptr(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_COMM));
 519                                 }
 520
 521                                 /* Couldn't find process name, it probably exited. */
 522                                 if (mstr == NULL) {
 523                                         continue;
 524                                 }
 525                         }
 526 #else
 527                                 mstr = kp->ki_comm;
 528 #endif
 529
 530                         rv = regexec(&reg, mstr, 1, &regmatch, 0);
 531                         if (rv == 0) {
 532                                 if (fullmatch) {
 533                                         if (regmatch.rm_so == 0 &&
 534                                             regmatch.rm_eo ==
 535                                             (off_t)strlen(mstr))
 536                                                 selected[i] = 1;
 537                                 } else
 538                                         selected[i] = 1;
 539                         } else if (rv != REG_NOMATCH) {
 540                                 regerror(rv, &reg, buf, sizeof(buf));
 541                                 errx(STATUS_ERROR,
 542                                     "Regular expression evaluation error (%s)",
 543                                     buf);
 544                         }
 545                         if (debug_opt > 1) {
 546                                 const char *rv_res = "NoMatch";
 547                                 if (selected[i])
 548                                         rv_res = "Matched";
 549                                 fprintf(stderr, "* %s %5d %3d %s\n", rv_res,
 550 #ifdef __APPLE__
 551                                     (pid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PID)),
 552                                     (uid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_UID)),
 553                                     mstr);
 554 #else
 555                                     kp->ki_pid, kp->ki_uid, mstr);
 556 #endif
 557                         }
 558                 }
 559
 560                 regfree(&reg);
 561         }
 562
 563 #ifdef __APPLE__
 564         for (i = 0; i < nproc; i++) {
 565                 kp = sysmon_table_get_row(plist, i);
 566 #else
 567         for (i = 0, kp = plist; i < nproc; i++, kp++) {
 568 #endif
 569                 if (PSKIP(kp))
 570                         continue;
 571
 572 #ifdef __APPLE__
 573                 if (pidfromfile >= 0 && (pid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PID)) != pidfromfile) {
 574 #else
 575                 if (pidfromfile >= 0 && kp->ki_pid != pidfromfile) {
 576 #endif
 577                         selected[i] = 0;
 578                         continue;
 579                 }
 580
 581                 SLIST_FOREACH(li, &ruidlist, li_chain)
 582 #ifdef __APPLE__
 583                         if ((uid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_RUID)) == (uid_t)li->li_number)
 584 #else
 585                         if (kp->ki_ruid == (uid_t)li->li_number)
 586 #endif
 587                                 break;
 588                 if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) {
 589                         selected[i] = 0;
 590                         continue;
 591                 }
 592
 593                 SLIST_FOREACH(li, &rgidlist, li_chain)
 594 #ifdef __APPLE__
 595                         if ((gid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_RGID)) == (gid_t)li->li_number)
 596 #else
 597                         if (kp->ki_rgid == (gid_t)li->li_number)
 598 #endif
 599                                 break;
 600                 if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) {
 601                         selected[i] = 0;
 602                         continue;
 603                 }
 604
 605                 SLIST_FOREACH(li, &euidlist, li_chain)
 606 #ifdef __APPLE__
 607                         if ((uid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_UID)) == (uid_t)li->li_number)
 608 #else
 609                         if (kp->ki_uid == (uid_t)li->li_number)
 610 #endif
 611                                 break;
 612                 if (SLIST_FIRST(&euidlist) != NULL && li == NULL) {
 613                         selected[i] = 0;
 614                         continue;
 615                 }
 616
 617                 SLIST_FOREACH(li, &ppidlist, li_chain)
 618 #ifdef __APPLE__
 619                         if ((pid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PPID)) == (pid_t)li->li_number)
 620 #else
 621                         if (kp->ki_ppid == (pid_t)li->li_number)
 622 #endif
 623                                 break;
 624                 if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) {
 625                         selected[i] = 0;
 626                         continue;
 627                 }
 628
 629                 SLIST_FOREACH(li, &pgrplist, li_chain)
 630 #ifdef __APPLE__
 631                         if ((pid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PGID)) == (pid_t)li->li_number)
 632 #else
 633                         if (kp->ki_pgid == (pid_t)li->li_number)
 634 #endif
 635                                 break;
 636                 if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) {
 637                         selected[i] = 0;
 638                         continue;
 639                 }
 640
 641                 SLIST_FOREACH(li, &tdevlist, li_chain) {
 642                         if (li->li_number == -1 &&
 643 #ifdef __APPLE__
 644                             (xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_FLAGS)) & PROC_FLAG_CONTROLT) == 0)
 645 #else
 646                             (kp->ki_flag & P_CONTROLT) == 0)
 647 #endif
 648                                 break;
 649 #ifdef __APPLE__
 650                         if ((dev_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_TDEV)) == (dev_t)li->li_number)
 651 #else
 652                         if (kp->ki_tdev == (dev_t)li->li_number)
 653 #endif
 654                                 break;
 655                 }
 656                 if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) {
 657                         selected[i] = 0;
 658                         continue;
 659                 }
 660
 661 #ifndef __APPLE__
 662                 SLIST_FOREACH(li, &sidlist, li_chain)
 663                         if (kp->ki_sid == (pid_t)li->li_number)
 664                                 break;
 665                 if (SLIST_FIRST(&sidlist) != NULL && li == NULL) {
 666                         selected[i] = 0;
 667                         continue;
 668                 }
 669
 670                 SLIST_FOREACH(li, &jidlist, li_chain) {
 671                         /* A particular jail ID, including 0 (not in jail) */
 672                         if (kp->ki_jid == (int)li->li_number)
 673                                 break;
 674                         /* Any jail */
 675                         if (kp->ki_jid > 0 && li->li_number == -1)
 676                                 break;
 677                 }
 678                 if (SLIST_FIRST(&jidlist) != NULL && li == NULL) {
 679                         selected[i] = 0;
 680                         continue;
 681                 }
 682 #endif /* !__APPLE__ */
 683
 684                 if (argc == 0)
 685                         selected[i] = 1;
 686         }
 687
 688         if (!ancestors) {
 689                 pid = mypid;
 690                 while (pid) {
 691 #ifdef __APPLE__
 692                         for (i = 0; i < nproc; i++) {
 693                                 kp = sysmon_table_get_row(plist, i);
 694 #else
 695                         for (i = 0, kp = plist; i < nproc; i++, kp++) {
 696 #endif
 697                                 if (PSKIP(kp))
 698                                         continue;
 699 #ifdef __APPLE__
 700                                 if ((pid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PID)) == pid) {
 701                                         selected[i] = 0;
 702                                         pid = (pid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PPID));
 703                                         break;
 704                                 }
 705 #else
 706                                 if (kp->ki_pid == pid) {
 707                                         selected[i] = 0;
 708                                         pid = kp->ki_ppid;
 709                                         break;
 710                                 }
 711 #endif
 712                         }
 713                         if (i == nproc) {
 714                                 if (pid == mypid)
 715                                         pid = getppid();
 716                                 else
 717                                         break;  /* Maybe we're in a jail ? */
 718                         }
 719                 }
 720         }
 721
 722         if (newest || oldest) {
 723 #ifdef __APPLE__
 724                 best_tval = 0;
 725 #else
 726                 best_tval.tv_sec = 0;
 727                 best_tval.tv_usec = 0;
 728 #endif
 729                 bestidx = -1;
 730
 731 #ifdef __APPLE__
 732                 for (i = 0; i < nproc; i++) {
 733                         kp = sysmon_table_get_row(plist, i);
 734 #else
 735                 for (i = 0, kp = plist; i < nproc; i++, kp++) {
 736 #endif
 737                         if (!selected[i])
 738                                 continue;
 739                         if (bestidx == -1) {
 740                                 /* The first entry of the list which matched. */
 741                                 ;
 742 #ifdef __APPLE__
 743                         } else if (xpc_date_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_START)) > best_tval) {
 744 #else
 745                         } else if (timercmp(&kp->ki_start, &best_tval, >)) {
 746 #endif
 747                                 /* This entry is newer than previous "best". */
 748                                 if (oldest)     /* but we want the oldest */
 749                                         continue;
 750                         } else {
 751                                 /* This entry is older than previous "best". */
 752                                 if (newest)     /* but we want the newest */
 753                                         continue;
 754                         }
 755                         /* This entry is better than previous "best" entry. */
 756 #ifdef __APPLE__
 757                         best_tval = xpc_date_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_START));
 758 #else
 759                         best_tval.tv_sec = kp->ki_start.tv_sec;
 760                         best_tval.tv_usec = kp->ki_start.tv_usec;
 761 #endif
 762                         bestidx = i;
 763                 }
 764
 765                 memset(selected, 0, nproc);
 766                 if (bestidx != -1)
 767                         selected[bestidx] = 1;
 768         }
 769
 770         /*
 771          * Take the appropriate action for each matched process, if any.
 772          */
 773         did_action = 0;
 774 #ifdef __APPLE__
 775         for (i = 0, rv = 0; i < nproc; i++) {
 776                 kp = sysmon_table_get_row(plist, i);
 777 #else
 778         for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) {
 779 #endif
 780                 if (PSKIP(kp))
 781                         continue;
 782                 if (selected[i]) {
 783                         if (longfmt && !pgrep) {
 784                                 did_action = 1;
 785 #ifdef __APPLE__
 786                                 printf("kill -%d %d\n", signum, (int)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PID)));
 787 #else
 788                                 printf("kill -%d %d\n", signum, kp->ki_pid);
 789 #endif
 790                         }
 791                         if (inverse)
 792                                 continue;
 793                 } else if (!inverse)
 794                         continue;
 795                 rv |= (*action)(kp);
 796         }
 797         if (!did_action && !pgrep && longfmt)
 798                 fprintf(stderr,
 799                     "No matching processes belonging to you were found\n");
 800
 801         exit(rv ? STATUS_MATCH : STATUS_NOMATCH);
 802 }
 803
 804 static void
 805 usage(void)
 806 {
 807         const char *ustr;
 808
 809         if (pgrep)
 810 #ifdef __APPLE__
 811                 ustr = "[-Lfilnoqvx] [-d delim]";
 812 #else
 813                 ustr = "[-LSfilnoqvx] [-d delim]";
 814 #endif
 815         else
 816                 ustr = "[-signal] [-ILfilnovx]";
 817
 818         fprintf(stderr,
 819 #ifdef __APPLE__
 820                 "usage: %s %s [-F pidfile] [-G gid]\n"
 821                 "             [-P ppid] [-U uid] [-g pgrp]\n"
 822 #else
 823                 "usage: %s %s [-F pidfile] [-G gid] [-M core] [-N system]\n"
 824                 "             [-P ppid] [-U uid] [-g pgrp] [-j jid] [-s sid]\n"
 825 #endif
 826                 "             [-t tty] [-u euid] pattern ...\n", getprogname(),
 827                 ustr);
 828
 829         exit(STATUS_BADUSAGE);
 830 }
 831
 832 static void
 833 #ifdef __APPLE__
 834 show_process(const sysmon_row_t kp)
 835 #else
 836 show_process(const struct kinfo_proc *kp)
 837 #endif
 838 {
 839 #ifdef __APPLE__
 840         xpc_object_t argv;
 841 #else
 842         char **argv;
 843 #endif
 844
 845         if (quiet) {
 846                 assert(pgrep);
 847                 return;
 848         }
 849 #ifdef __APPLE__
 850         if ((longfmt || !pgrep) && matchargs &&
 851             (argv = sysmon_row_get_value(kp, SYSMON_ATTR_PROC_ARGUMENTS)) != NULL) {
 852                 printf("%d ", (int)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PID)));
 853                 (void)xpc_array_apply(argv, ^(size_t index, xpc_object_t value) {
 854                         printf("%s", xpc_string_get_string_ptr(value));
 855                         if (index < xpc_array_get_count(argv) - 1)
 856                                 putchar(' ');
 857                         return (bool)true;
 858                 });
 859         } else if (longfmt || !pgrep)
 860                 printf("%d %s",
 861                     (int)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PID)),
 862                     xpc_string_get_string_ptr(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_COMM)));
 863         else
 864                 printf("%d", (int)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PID)));
 865 #else
 866         if ((longfmt || !pgrep) && matchargs &&
 867             (argv = kvm_getargv(kd, kp, 0)) != NULL) {
 868                 printf("%d ", (int)kp->ki_pid);
 869                 for (; *argv != NULL; argv++) {
 870                         printf("%s", *argv);
 871                         if (argv[1] != NULL)
 872                                 putchar(' ');
 873                 }
 874         } else if (longfmt || !pgrep)
 875                 printf("%d %s", (int)kp->ki_pid, kp->ki_comm);
 876         else
 877                 printf("%d", (int)kp->ki_pid);
 878 #endif
 879 }
 880
 881 static int
 882 #ifdef __APPLE__
 883 killact(const sysmon_row_t kp)
 884 #else
 885 killact(const struct kinfo_proc *kp)
 886 #endif
 887 {
 888         int ch, first;
 889
 890         if (interactive) {
 891                 /*
 892                  * Be careful, ask before killing.
 893                  */
 894                 printf("kill ");
 895                 show_process(kp);
 896                 printf("? ");
 897                 fflush(stdout);
 898                 first = ch = getchar();
 899                 while (ch != '\n' && ch != EOF)
 900                         ch = getchar();
 901                 if (first != 'y' && first != 'Y')
 902                         return (1);
 903         }
 904 #ifdef __APPLE__
 905         if (kill((pid_t)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PID)), signum) == -1) {
 906 #else
 907         if (kill(kp->ki_pid, signum) == -1) {
 908 #endif
 909                 /*
 910                  * Check for ESRCH, which indicates that the process
 911                  * disappeared between us matching it and us
 912                  * signalling it; don't issue a warning about it.
 913                  */
 914                 if (errno != ESRCH)
 915 #ifdef __APPLE__
 916                         warn("signalling pid %d", (int)xpc_uint64_get_value(sysmon_row_get_value(kp, SYSMON_ATTR_PROC_PID)));
 917 #else
 918                         warn("signalling pid %d", (int)kp->ki_pid);
 919 #endif
 920                 /*
 921                  * Return 0 to indicate that the process should not be
 922                  * considered a match, since we didn't actually get to
 923                  * signal it.
 924                  */
 925                 return (0);
 926         }
 927         return (1);
 928 }
 929
 930 static int
 931 #ifdef __APPLE__
 932 grepact(const sysmon_row_t kp)
 933 #else
 934 grepact(const struct kinfo_proc *kp)
 935 #endif
 936 {
 937
 938         show_process(kp);
 939         if (!quiet)
 940                 printf("%s", delim);
 941         return (1);
 942 }
 943
 944 static void
 945 makelist(struct listhead *head, enum listtype type, char *src)
 946 {
 947         struct list *li;
 948         struct passwd *pw;
 949         struct group *gr;
 950         struct stat st;
 951         const char *cp;
 952         char *sp, *ep, buf[MAXPATHLEN];
 953         int empty;
 954
 955         empty = 1;
 956
 957         while ((sp = strsep(&src, ",")) != NULL) {
 958                 if (*sp == '\0')
 959                         usage();
 960
 961                 if ((li = malloc(sizeof(*li))) == NULL) {
 962                         err(STATUS_ERROR, "Cannot allocate %zu bytes",
 963                             sizeof(*li));
 964                 }
 965
 966                 SLIST_INSERT_HEAD(head, li, li_chain);
 967                 empty = 0;
 968
 969                 li->li_number = (uid_t)strtol(sp, &ep, 0);
 970                 if (*ep == '\0') {
 971                         switch (type) {
 972                         case LT_PGRP:
 973                                 if (li->li_number == 0)
 974                                         li->li_number = getpgrp();
 975                                 break;
 976 #ifndef __APPLE__
 977                         case LT_SID:
 978                                 if (li->li_number == 0)
 979                                         li->li_number = getsid(mypid);
 980                                 break;
 981                         case LT_JID:
 982                                 if (li->li_number < 0)
 983                                         errx(STATUS_BADUSAGE,
 984                                              "Negative jail ID `%s'", sp);
 985                                 /* For compatibility with old -j */
 986                                 if (li->li_number == 0)
 987                                         li->li_number = -1;     /* any jail */
 988                                 break;
 989 #endif /* !__APPLE__ */
 990                         case LT_TTY:
 991                                 if (li->li_number < 0)
 992                                         errx(STATUS_BADUSAGE,
 993                                              "Negative /dev/pts tty `%s'", sp);
 994                                 snprintf(buf, sizeof(buf), _PATH_DEV "pts/%s",
 995                                     sp);
 996                                 if (stat(buf, &st) != -1)
 997                                         goto foundtty;
 998                                 if (errno == ENOENT)
 999                                         errx(STATUS_BADUSAGE, "No such tty: `"
1000                                             _PATH_DEV "pts/%s'", sp);
1001                                 err(STATUS_ERROR, "Cannot access `"
1002                                     _PATH_DEV "pts/%s'", sp);
1003                                 break;
1004                         default:
1005                                 break;
1006                         }
1007                         continue;
1008                 }
1009
1010                 switch (type) {
1011                 case LT_USER:
1012                         if ((pw = getpwnam(sp)) == NULL)
1013                                 errx(STATUS_BADUSAGE, "Unknown user `%s'", sp);
1014                         li->li_number = pw->pw_uid;
1015                         break;
1016                 case LT_GROUP:
1017                         if ((gr = getgrnam(sp)) == NULL)
1018                                 errx(STATUS_BADUSAGE, "Unknown group `%s'", sp);
1019                         li->li_number = gr->gr_gid;
1020                         break;
1021                 case LT_TTY:
1022                         if (strcmp(sp, "-") == 0) {
1023                                 li->li_number = -1;
1024                                 break;
1025                         } else if (strcmp(sp, "co") == 0) {
1026                                 cp = "console";
1027                         } else {
1028                                 cp = sp;
1029                         }
1030
1031                         snprintf(buf, sizeof(buf), _PATH_DEV "%s", cp);
1032                         if (stat(buf, &st) != -1)
1033                                 goto foundtty;
1034
1035                         snprintf(buf, sizeof(buf), _PATH_DEV "tty%s", cp);
1036                         if (stat(buf, &st) != -1)
1037                                 goto foundtty;
1038
1039                         if (errno == ENOENT)
1040                                 errx(STATUS_BADUSAGE, "No such tty: `%s'", sp);
1041                         err(STATUS_ERROR, "Cannot access `%s'", sp);
1042
1043 foundtty:               if ((st.st_mode & S_IFCHR) == 0)
1044                                 errx(STATUS_BADUSAGE, "Not a tty: `%s'", sp);
1045
1046                         li->li_number = st.st_rdev;
1047                         break;
1048 #ifndef __APPLE__
1049                 case LT_JID:
1050                         if (strcmp(sp, "none") == 0)
1051                                 li->li_number = 0;
1052                         else if (strcmp(sp, "any") == 0)
1053                                 li->li_number = -1;
1054                         else if (*ep != '\0')
1055                                 errx(STATUS_BADUSAGE,
1056                                      "Invalid jail ID `%s'", sp);
1057                         break;
1058 #endif /* !__APPLE__ */
1059                 default:
1060                         usage();
1061                 }
1062         }
1063
1064         if (empty)
1065                 usage();
1066 }
1067
1068 static int
1069 takepid(const char *pidfile, int pidfilelock)
1070 {
1071         char *endp, line[BUFSIZ];
1072         FILE *fh;
1073         long rval;
1074
1075         fh = fopen(pidfile, "r");
1076         if (fh == NULL)
1077                 err(STATUS_ERROR, "Cannot open pidfile `%s'", pidfile);
1078
1079         if (pidfilelock) {
1080                 /*
1081                  * If we can lock pidfile, this means that daemon is not
1082                  * running, so would be better not to kill some random process.
1083                  */
1084                 if (flock(fileno(fh), LOCK_EX | LOCK_NB) == 0) {
1085                         (void)fclose(fh);
1086                         errx(STATUS_ERROR, "File '%s' can be locked", pidfile);
1087                 } else {
1088                         if (errno != EWOULDBLOCK) {
1089                                 errx(STATUS_ERROR,
1090                                     "Error while locking file '%s'", pidfile);
1091                         }
1092                 }
1093         }
1094
1095         if (fgets(line, sizeof(line), fh) == NULL) {
1096                 if (feof(fh)) {
1097                         (void)fclose(fh);
1098                         errx(STATUS_ERROR, "Pidfile `%s' is empty", pidfile);
1099                 }
1100                 (void)fclose(fh);
1101                 err(STATUS_ERROR, "Cannot read from pid file `%s'", pidfile);
1102         }
1103         (void)fclose(fh);
1104
1105         rval = strtol(line, &endp, 10);
1106         if (*endp != '\0' && !isspace((unsigned char)*endp))
1107                 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile);
1108         else if (rval < MIN_PID || rval > MAX_PID)
1109                 errx(STATUS_ERROR, "Invalid pid in file `%s'", pidfile);
1110         return (rval);
1111 }