ps.c revision 180596
1/*- 2 * Copyright (c) 1990, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * ------+---------+---------+-------- + --------+---------+---------+---------* 29 * Copyright (c) 2004 - Garance Alistair Drosehn <gad@FreeBSD.org>. 30 * All rights reserved. 31 * 32 * Significant modifications made to bring `ps' options somewhat closer 33 * to the standard for `ps' as described in SingleUnixSpec-v3. 34 * ------+---------+---------+-------- + --------+---------+---------+---------* 35 */ 36 37#ifndef lint 38static const char copyright[] = 39"@(#) Copyright (c) 1990, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41#endif /* not lint */ 42 43#if 0 44#ifndef lint 45static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 46#endif /* not lint */ 47#endif 48 49#include <sys/cdefs.h> 50__FBSDID("$FreeBSD: head/bin/ps/ps.c 180596 2008-07-18 14:55:22Z kevlo $"); 51 52#include <sys/param.h> 53#include <sys/proc.h> 54#include <sys/user.h> 55#include <sys/stat.h> 56#include <sys/ioctl.h> 57#include <sys/sysctl.h> 58#include <sys/mount.h> 59 60#include <ctype.h> 61#include <err.h> 62#include <errno.h> 63#include <fcntl.h> 64#include <grp.h> 65#include <kvm.h> 66#include <limits.h> 67#include <locale.h> 68#include <paths.h> 69#include <pwd.h> 70#include <stdio.h> 71#include <stdlib.h> 72#include <string.h> 73#include <unistd.h> 74 75#include "ps.h" 76 77#define _PATH_PTS "/dev/pts/" 78 79#define W_SEP " \t" /* "Whitespace" list separators */ 80#define T_SEP "," /* "Terminate-element" list separators */ 81 82#ifdef LAZY_PS 83#define DEF_UREAD 0 84#define OPT_LAZY_f "f" 85#else 86#define DEF_UREAD 1 /* Always do the more-expensive read. */ 87#define OPT_LAZY_f /* I.e., the `-f' option is not added. */ 88#endif 89 90/* 91 * isdigit takes an `int', but expects values in the range of unsigned char. 92 * This wrapper ensures that values from a 'char' end up in the correct range. 93 */ 94#define isdigitch(Anychar) isdigit((u_char)(Anychar)) 95 96int cflag; /* -c */ 97int eval; /* Exit value */ 98time_t now; /* Current time(3) value */ 99int rawcpu; /* -C */ 100int sumrusage; /* -S */ 101int termwidth; /* Width of the screen (0 == infinity). */ 102int totwidth; /* Calculated-width of requested variables. */ 103int showthreads; /* will threads be shown? */ 104 105struct velisthead varlist = STAILQ_HEAD_INITIALIZER(varlist); 106 107static int forceuread = DEF_UREAD; /* Do extra work to get u-area. */ 108static kvm_t *kd; 109static KINFO *kinfo; 110static int needcomm; /* -o "command" */ 111static int needenv; /* -e */ 112static int needuser; /* -o "user" */ 113static int optfatal; /* Fatal error parsing some list-option. */ 114 115static enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 116 117struct listinfo; 118typedef int addelem_rtn(struct listinfo *_inf, const char *_elem); 119 120struct listinfo { 121 int count; 122 int maxcount; 123 int elemsize; 124 addelem_rtn *addelem; 125 const char *lname; 126 union { 127 gid_t *gids; 128 pid_t *pids; 129 dev_t *ttys; 130 uid_t *uids; 131 void *ptr; 132 } l; 133}; 134 135static int check_procfs(void); 136static int addelem_gid(struct listinfo *, const char *); 137static int addelem_pid(struct listinfo *, const char *); 138static int addelem_tty(struct listinfo *, const char *); 139static int addelem_uid(struct listinfo *, const char *); 140static void add_list(struct listinfo *, const char *); 141static void dynsizevars(KINFO *); 142static void *expand_list(struct listinfo *); 143static const char * 144 fmt(char **(*)(kvm_t *, const struct kinfo_proc *, int), 145 KINFO *, char *, int); 146static void free_list(struct listinfo *); 147static void init_list(struct listinfo *, addelem_rtn, int, const char *); 148static char *kludge_oldps_options(const char *, char *, const char *); 149static int pscomp(const void *, const void *); 150static void saveuser(KINFO *); 151static void scanvars(void); 152static void sizevars(void); 153static void usage(void); 154 155static char dfmt[] = "pid,tt,state,time,command"; 156static char jfmt[] = "user,pid,ppid,pgid,sid,jobc,state,tt,time,command"; 157static char lfmt[] = "uid,pid,ppid,cpu,pri,nice,vsz,rss,mwchan,state," 158 "tt,time,command"; 159static char o1[] = "pid"; 160static char o2[] = "tt,state,time,command"; 161static char ufmt[] = "user,pid,%cpu,%mem,vsz,rss,tt,state,start,time,command"; 162static char vfmt[] = "pid,state,time,sl,re,pagein,vsz,rss,lim,tsiz," 163 "%cpu,%mem,command"; 164static char Zfmt[] = "label"; 165 166#define PS_ARGS "AaCce" OPT_LAZY_f "G:gHhjLlM:mN:O:o:p:rSTt:U:uvwXxZ" 167 168int 169main(int argc, char *argv[]) 170{ 171 struct listinfo gidlist, pgrplist, pidlist; 172 struct listinfo ruidlist, sesslist, ttylist, uidlist; 173 struct kinfo_proc *kp; 174 KINFO *next_KINFO; 175 struct varent *vent; 176 struct winsize ws; 177 const char *nlistf, *memf; 178 char *cols; 179 int all, ch, elem, flag, _fmt, i, lineno; 180 int nentries, nkept, nselectors; 181 int prtheader, wflag, what, xkeep, xkeep_implied; 182 char errbuf[_POSIX2_LINE_MAX]; 183 184 (void) setlocale(LC_ALL, ""); 185 time(&now); /* Used by routines in print.c. */ 186 187 if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0') 188 termwidth = atoi(cols); 189 else if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 190 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 191 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 192 ws.ws_col == 0) 193 termwidth = 79; 194 else 195 termwidth = ws.ws_col - 1; 196 197 /* 198 * Hide a number of option-processing kludges in a separate routine, 199 * to support some historical BSD behaviors, such as `ps axu'. 200 */ 201 if (argc > 1) 202 argv[1] = kludge_oldps_options(PS_ARGS, argv[1], argv[2]); 203 204 all = _fmt = nselectors = optfatal = 0; 205 prtheader = showthreads = wflag = xkeep_implied = 0; 206 xkeep = -1; /* Neither -x nor -X. */ 207 init_list(&gidlist, addelem_gid, sizeof(gid_t), "group"); 208 init_list(&pgrplist, addelem_pid, sizeof(pid_t), "process group"); 209 init_list(&pidlist, addelem_pid, sizeof(pid_t), "process id"); 210 init_list(&ruidlist, addelem_uid, sizeof(uid_t), "ruser"); 211 init_list(&sesslist, addelem_pid, sizeof(pid_t), "session id"); 212 init_list(&ttylist, addelem_tty, sizeof(dev_t), "tty"); 213 init_list(&uidlist, addelem_uid, sizeof(uid_t), "user"); 214 memf = nlistf = _PATH_DEVNULL; 215 while ((ch = getopt(argc, argv, PS_ARGS)) != -1) 216 switch (ch) { 217 case 'A': 218 /* 219 * Exactly the same as `-ax'. This has been 220 * added for compatability with SUSv3, but for 221 * now it will not be described in the man page. 222 */ 223 nselectors++; 224 all = xkeep = 1; 225 break; 226 case 'a': 227 nselectors++; 228 all = 1; 229 break; 230 case 'C': 231 rawcpu = 1; 232 break; 233 case 'c': 234 cflag = 1; 235 break; 236 case 'e': /* XXX set ufmt */ 237 needenv = 1; 238 break; 239#ifdef LAZY_PS 240 case 'f': 241 if (getuid() == 0 || getgid() == 0) 242 forceuread = 1; 243 break; 244#endif 245 case 'G': 246 add_list(&gidlist, optarg); 247 xkeep_implied = 1; 248 nselectors++; 249 break; 250 case 'g': 251#if 0 252 /*- 253 * XXX - This SUSv3 behavior is still under debate 254 * since it conflicts with the (undocumented) 255 * `-g' option. So we skip it for now. 256 */ 257 add_list(&pgrplist, optarg); 258 xkeep_implied = 1; 259 nselectors++; 260 break; 261#else 262 /* The historical BSD-ish (from SunOS) behavior. */ 263 break; /* no-op */ 264#endif 265 case 'H': 266 showthreads = KERN_PROC_INC_THREAD; 267 break; 268 case 'h': 269 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 270 break; 271 case 'j': 272 parsefmt(jfmt, 0); 273 _fmt = 1; 274 jfmt[0] = '\0'; 275 break; 276 case 'L': 277 showkey(); 278 exit(0); 279 case 'l': 280 parsefmt(lfmt, 0); 281 _fmt = 1; 282 lfmt[0] = '\0'; 283 break; 284 case 'M': 285 memf = optarg; 286 break; 287 case 'm': 288 sortby = SORTMEM; 289 break; 290 case 'N': 291 nlistf = optarg; 292 break; 293 case 'O': 294 parsefmt(o1, 1); 295 parsefmt(optarg, 1); 296 parsefmt(o2, 1); 297 o1[0] = o2[0] = '\0'; 298 _fmt = 1; 299 break; 300 case 'o': 301 parsefmt(optarg, 1); 302 _fmt = 1; 303 break; 304 case 'p': 305 add_list(&pidlist, optarg); 306 /* 307 * Note: `-p' does not *set* xkeep, but any values 308 * from pidlist are checked before xkeep is. That 309 * way they are always matched, even if the user 310 * specifies `-X'. 311 */ 312 nselectors++; 313 break; 314#if 0 315 case 'R': 316 /*- 317 * XXX - This un-standard option is still under 318 * debate. This is what SUSv3 defines as 319 * the `-U' option, and while it would be 320 * nice to have, it could cause even more 321 * confusion to implement it as `-R'. 322 */ 323 add_list(&ruidlist, optarg); 324 xkeep_implied = 1; 325 nselectors++; 326 break; 327#endif 328 case 'r': 329 sortby = SORTCPU; 330 break; 331 case 'S': 332 sumrusage = 1; 333 break; 334#if 0 335 case 's': 336 /*- 337 * XXX - This non-standard option is still under 338 * debate. This *is* supported on Solaris, 339 * Linux, and IRIX, but conflicts with `-s' 340 * on NetBSD and maybe some older BSD's. 341 */ 342 add_list(&sesslist, optarg); 343 xkeep_implied = 1; 344 nselectors++; 345 break; 346#endif 347 case 'T': 348 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 349 errx(1, "stdin: not a terminal"); 350 /* FALLTHROUGH */ 351 case 't': 352 add_list(&ttylist, optarg); 353 xkeep_implied = 1; 354 nselectors++; 355 break; 356 case 'U': 357 /* This is what SUSv3 defines as the `-u' option. */ 358 add_list(&uidlist, optarg); 359 xkeep_implied = 1; 360 nselectors++; 361 break; 362 case 'u': 363 parsefmt(ufmt, 0); 364 sortby = SORTCPU; 365 _fmt = 1; 366 ufmt[0] = '\0'; 367 break; 368 case 'v': 369 parsefmt(vfmt, 0); 370 sortby = SORTMEM; 371 _fmt = 1; 372 vfmt[0] = '\0'; 373 break; 374 case 'w': 375 if (wflag) 376 termwidth = UNLIMITED; 377 else if (termwidth < 131) 378 termwidth = 131; 379 wflag++; 380 break; 381 case 'X': 382 /* 383 * Note that `-X' and `-x' are not standard "selector" 384 * options. For most selector-options, we check *all* 385 * processes to see if any are matched by the given 386 * value(s). After we have a set of all the matched 387 * processes, then `-X' and `-x' govern whether we 388 * modify that *matched* set for processes which do 389 * not have a controlling terminal. `-X' causes 390 * those processes to be deleted from the matched 391 * set, while `-x' causes them to be kept. 392 */ 393 xkeep = 0; 394 break; 395 case 'x': 396 xkeep = 1; 397 break; 398 case 'Z': 399 parsefmt(Zfmt, 0); 400 Zfmt[0] = '\0'; 401 break; 402 case '?': 403 default: 404 usage(); 405 } 406 argc -= optind; 407 argv += optind; 408 409 /* 410 * If the user specified ps -e then they want a copy of the process 411 * environment kvm_getenvv(3) attempts to open /proc/<pid>/mem. 412 * Check to make sure that procfs is mounted on /proc, otherwise 413 * print a warning informing the user that output will be incomplete. 414 */ 415 if (needenv == 1 && check_procfs() == 0) 416 warnx("Process environment requires procfs(5)"); 417 /* 418 * If there arguments after processing all the options, attempt 419 * to treat them as a list of process ids. 420 */ 421 while (*argv) { 422 if (!isdigitch(**argv)) 423 break; 424 add_list(&pidlist, *argv); 425 argv++; 426 } 427 if (*argv) { 428 fprintf(stderr, "%s: illegal argument: %s\n", 429 getprogname(), *argv); 430 usage(); 431 } 432 if (optfatal) 433 exit(1); /* Error messages already printed. */ 434 if (xkeep < 0) /* Neither -X nor -x was specified. */ 435 xkeep = xkeep_implied; 436 437 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 438 if (kd == 0) 439 errx(1, "%s", errbuf); 440 441 if (!_fmt) 442 parsefmt(dfmt, 0); 443 444 if (nselectors == 0) { 445 uidlist.l.ptr = malloc(sizeof(uid_t)); 446 if (uidlist.l.ptr == NULL) 447 errx(1, "malloc failed"); 448 nselectors = 1; 449 uidlist.count = uidlist.maxcount = 1; 450 *uidlist.l.uids = getuid(); 451 } 452 453 /* 454 * scan requested variables, noting what structures are needed, 455 * and adjusting header widths as appropriate. 456 */ 457 scanvars(); 458 459 /* 460 * Get process list. If the user requested just one selector- 461 * option, then kvm_getprocs can be asked to return just those 462 * processes. Otherwise, have it return all processes, and 463 * then this routine will search that full list and select the 464 * processes which match any of the user's selector-options. 465 */ 466 what = showthreads != 0 ? KERN_PROC_ALL : KERN_PROC_PROC; 467 flag = 0; 468 if (nselectors == 1) { 469 if (gidlist.count == 1) { 470 what = KERN_PROC_RGID | showthreads; 471 flag = *gidlist.l.gids; 472 nselectors = 0; 473 } else if (pgrplist.count == 1) { 474 what = KERN_PROC_PGRP | showthreads; 475 flag = *pgrplist.l.pids; 476 nselectors = 0; 477 } else if (pidlist.count == 1) { 478 what = KERN_PROC_PID | showthreads; 479 flag = *pidlist.l.pids; 480 nselectors = 0; 481 } else if (ruidlist.count == 1) { 482 what = KERN_PROC_RUID | showthreads; 483 flag = *ruidlist.l.uids; 484 nselectors = 0; 485 } else if (sesslist.count == 1) { 486 what = KERN_PROC_SESSION | showthreads; 487 flag = *sesslist.l.pids; 488 nselectors = 0; 489 } else if (ttylist.count == 1) { 490 what = KERN_PROC_TTY | showthreads; 491 flag = *ttylist.l.ttys; 492 nselectors = 0; 493 } else if (uidlist.count == 1) { 494 what = KERN_PROC_UID | showthreads; 495 flag = *uidlist.l.uids; 496 nselectors = 0; 497 } else if (all) { 498 /* No need for this routine to select processes. */ 499 nselectors = 0; 500 } 501 } 502 503 /* 504 * select procs 505 */ 506 nentries = -1; 507 kp = kvm_getprocs(kd, what, flag, &nentries); 508 if ((kp == NULL && nentries > 0) || (kp != NULL && nentries < 0)) 509 errx(1, "%s", kvm_geterr(kd)); 510 nkept = 0; 511 if (nentries > 0) { 512 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 513 errx(1, "malloc failed"); 514 for (i = nentries; --i >= 0; ++kp) { 515 /* 516 * If the user specified multiple selection-criteria, 517 * then keep any process matched by the inclusive OR 518 * of all the selection-criteria given. 519 */ 520 if (pidlist.count > 0) { 521 for (elem = 0; elem < pidlist.count; elem++) 522 if (kp->ki_pid == pidlist.l.pids[elem]) 523 goto keepit; 524 } 525 /* 526 * Note that we had to process pidlist before 527 * filtering out processes which do not have 528 * a controlling terminal. 529 */ 530 if (xkeep == 0) { 531 if ((kp->ki_tdev == NODEV || 532 (kp->ki_flag & P_CONTROLT) == 0)) 533 continue; 534 } 535 if (nselectors == 0) 536 goto keepit; 537 if (gidlist.count > 0) { 538 for (elem = 0; elem < gidlist.count; elem++) 539 if (kp->ki_rgid == gidlist.l.gids[elem]) 540 goto keepit; 541 } 542 if (pgrplist.count > 0) { 543 for (elem = 0; elem < pgrplist.count; elem++) 544 if (kp->ki_pgid == 545 pgrplist.l.pids[elem]) 546 goto keepit; 547 } 548 if (ruidlist.count > 0) { 549 for (elem = 0; elem < ruidlist.count; elem++) 550 if (kp->ki_ruid == 551 ruidlist.l.uids[elem]) 552 goto keepit; 553 } 554 if (sesslist.count > 0) { 555 for (elem = 0; elem < sesslist.count; elem++) 556 if (kp->ki_sid == sesslist.l.pids[elem]) 557 goto keepit; 558 } 559 if (ttylist.count > 0) { 560 for (elem = 0; elem < ttylist.count; elem++) 561 if (kp->ki_tdev == ttylist.l.ttys[elem]) 562 goto keepit; 563 } 564 if (uidlist.count > 0) { 565 for (elem = 0; elem < uidlist.count; elem++) 566 if (kp->ki_uid == uidlist.l.uids[elem]) 567 goto keepit; 568 } 569 /* 570 * This process did not match any of the user's 571 * selector-options, so skip the process. 572 */ 573 continue; 574 575 keepit: 576 next_KINFO = &kinfo[nkept]; 577 next_KINFO->ki_p = kp; 578 next_KINFO->ki_pcpu = getpcpu(next_KINFO); 579 if (sortby == SORTMEM) 580 next_KINFO->ki_memsize = kp->ki_tsize + 581 kp->ki_dsize + kp->ki_ssize; 582 if (needuser) 583 saveuser(next_KINFO); 584 dynsizevars(next_KINFO); 585 nkept++; 586 } 587 } 588 589 sizevars(); 590 591 /* 592 * print header 593 */ 594 printheader(); 595 if (nkept == 0) 596 exit(1); 597 598 /* 599 * sort proc list 600 */ 601 qsort(kinfo, nkept, sizeof(KINFO), pscomp); 602 /* 603 * For each process, call each variable output function. 604 */ 605 for (i = lineno = 0; i < nkept; i++) { 606 STAILQ_FOREACH(vent, &varlist, next_ve) { 607 (vent->var->oproc)(&kinfo[i], vent); 608 if (STAILQ_NEXT(vent, next_ve) != NULL) 609 (void)putchar(' '); 610 } 611 (void)putchar('\n'); 612 if (prtheader && lineno++ == prtheader - 4) { 613 (void)putchar('\n'); 614 printheader(); 615 lineno = 0; 616 } 617 } 618 free_list(&gidlist); 619 free_list(&pidlist); 620 free_list(&pgrplist); 621 free_list(&ruidlist); 622 free_list(&sesslist); 623 free_list(&ttylist); 624 free_list(&uidlist); 625 626 exit(eval); 627} 628 629static int 630addelem_gid(struct listinfo *inf, const char *elem) 631{ 632 struct group *grp; 633 const char *nameorID; 634 char *endp; 635 u_long bigtemp; 636 637 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 638 if (*elem == '\0') 639 warnx("Invalid (zero-length) %s name", inf->lname); 640 else 641 warnx("%s name too long: %s", inf->lname, elem); 642 optfatal = 1; 643 return (0); /* Do not add this value. */ 644 } 645 646 /* 647 * SUSv3 states that `ps -G grouplist' should match "real-group 648 * ID numbers", and does not mention group-names. I do want to 649 * also support group-names, so this tries for a group-id first, 650 * and only tries for a name if that doesn't work. This is the 651 * opposite order of what is done in addelem_uid(), but in 652 * practice the order would only matter for group-names which 653 * are all-numeric. 654 */ 655 grp = NULL; 656 nameorID = "named"; 657 errno = 0; 658 bigtemp = strtoul(elem, &endp, 10); 659 if (errno == 0 && *endp == '\0' && bigtemp <= GID_MAX) { 660 nameorID = "name or ID matches"; 661 grp = getgrgid((gid_t)bigtemp); 662 } 663 if (grp == NULL) 664 grp = getgrnam(elem); 665 if (grp == NULL) { 666 warnx("No %s %s '%s'", inf->lname, nameorID, elem); 667 optfatal = 1; 668 return (0); 669 } 670 if (inf->count >= inf->maxcount) 671 expand_list(inf); 672 inf->l.gids[(inf->count)++] = grp->gr_gid; 673 return (1); 674} 675 676#define BSD_PID_MAX 99999 /* Copy of PID_MAX from sys/proc.h. */ 677static int 678addelem_pid(struct listinfo *inf, const char *elem) 679{ 680 char *endp; 681 long tempid; 682 683 if (*elem == '\0') { 684 warnx("Invalid (zero-length) process id"); 685 optfatal = 1; 686 return (0); /* Do not add this value. */ 687 } 688 689 errno = 0; 690 tempid = strtol(elem, &endp, 10); 691 if (*endp != '\0' || tempid < 0 || elem == endp) { 692 warnx("Invalid %s: %s", inf->lname, elem); 693 errno = ERANGE; 694 } else if (errno != 0 || tempid > BSD_PID_MAX) { 695 warnx("%s too large: %s", inf->lname, elem); 696 errno = ERANGE; 697 } 698 if (errno == ERANGE) { 699 optfatal = 1; 700 return (0); 701 } 702 if (inf->count >= inf->maxcount) 703 expand_list(inf); 704 inf->l.pids[(inf->count)++] = tempid; 705 return (1); 706} 707#undef BSD_PID_MAX 708 709/*- 710 * The user can specify a device via one of three formats: 711 * 1) fully qualified, e.g.: /dev/ttyp0 /dev/console /dev/pts/0 712 * 2) missing "/dev", e.g.: ttyp0 console pts/0 713 * 3) two-letters, e.g.: p0 co 0 714 * (matching letters that would be seen in the "TT" column) 715 */ 716static int 717addelem_tty(struct listinfo *inf, const char *elem) 718{ 719 const char *ttypath; 720 struct stat sb; 721 char pathbuf[PATH_MAX], pathbuf2[PATH_MAX], pathbuf3[PATH_MAX]; 722 723 ttypath = NULL; 724 pathbuf2[0] = '\0'; 725 pathbuf3[0] = '\0'; 726 switch (*elem) { 727 case '/': 728 ttypath = elem; 729 break; 730 case 'c': 731 if (strcmp(elem, "co") == 0) { 732 ttypath = _PATH_CONSOLE; 733 break; 734 } 735 /* FALLTHROUGH */ 736 default: 737 strlcpy(pathbuf, _PATH_DEV, sizeof(pathbuf)); 738 strlcat(pathbuf, elem, sizeof(pathbuf)); 739 ttypath = pathbuf; 740 if (strncmp(pathbuf, _PATH_TTY, strlen(_PATH_TTY)) == 0) 741 break; 742 if (strncmp(pathbuf, _PATH_PTS, strlen(_PATH_PTS)) == 0) 743 break; 744 if (strcmp(pathbuf, _PATH_CONSOLE) == 0) 745 break; 746 /* Check to see if /dev/tty${elem} exists */ 747 strlcpy(pathbuf2, _PATH_TTY, sizeof(pathbuf2)); 748 strlcat(pathbuf2, elem, sizeof(pathbuf2)); 749 if (stat(pathbuf2, &sb) == 0 && S_ISCHR(sb.st_mode)) { 750 /* No need to repeat stat() && S_ISCHR() checks */ 751 ttypath = NULL; 752 break; 753 } 754 /* Check to see if /dev/pts/${elem} exists */ 755 strlcpy(pathbuf3, _PATH_PTS, sizeof(pathbuf3)); 756 strlcat(pathbuf3, elem, sizeof(pathbuf3)); 757 if (stat(pathbuf3, &sb) == 0 && S_ISCHR(sb.st_mode)) { 758 /* No need to repeat stat() && S_ISCHR() checks */ 759 ttypath = NULL; 760 break; 761 } 762 break; 763 } 764 if (ttypath) { 765 if (stat(ttypath, &sb) == -1) { 766 if (pathbuf3[0] != '\0') 767 warn("%s, %s, and %s", pathbuf3, pathbuf2, 768 ttypath); 769 else 770 warn("%s", ttypath); 771 optfatal = 1; 772 return (0); 773 } 774 if (!S_ISCHR(sb.st_mode)) { 775 if (pathbuf3[0] != '\0') 776 warnx("%s, %s, and %s: Not a terminal", 777 pathbuf3, pathbuf2, ttypath); 778 else 779 warnx("%s: Not a terminal", ttypath); 780 optfatal = 1; 781 return (0); 782 } 783 } 784 if (inf->count >= inf->maxcount) 785 expand_list(inf); 786 inf->l.ttys[(inf->count)++] = sb.st_rdev; 787 return (1); 788} 789 790static int 791addelem_uid(struct listinfo *inf, const char *elem) 792{ 793 struct passwd *pwd; 794 char *endp; 795 u_long bigtemp; 796 797 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 798 if (*elem == '\0') 799 warnx("Invalid (zero-length) %s name", inf->lname); 800 else 801 warnx("%s name too long: %s", inf->lname, elem); 802 optfatal = 1; 803 return (0); /* Do not add this value. */ 804 } 805 806 pwd = getpwnam(elem); 807 if (pwd == NULL) { 808 errno = 0; 809 bigtemp = strtoul(elem, &endp, 10); 810 if (errno != 0 || *endp != '\0' || bigtemp > UID_MAX) 811 warnx("No %s named '%s'", inf->lname, elem); 812 else { 813 /* The string is all digits, so it might be a userID. */ 814 pwd = getpwuid((uid_t)bigtemp); 815 if (pwd == NULL) 816 warnx("No %s name or ID matches '%s'", 817 inf->lname, elem); 818 } 819 } 820 if (pwd == NULL) { 821 /* 822 * These used to be treated as minor warnings (and the 823 * option was simply ignored), but now they are fatal 824 * errors (and the command will be aborted). 825 */ 826 optfatal = 1; 827 return (0); 828 } 829 if (inf->count >= inf->maxcount) 830 expand_list(inf); 831 inf->l.uids[(inf->count)++] = pwd->pw_uid; 832 return (1); 833} 834 835static void 836add_list(struct listinfo *inf, const char *argp) 837{ 838 const char *savep; 839 char *cp, *endp; 840 int toolong; 841 char elemcopy[PATH_MAX]; 842 843 if (*argp == 0) 844 inf->addelem(inf, elemcopy); 845 while (*argp != '\0') { 846 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 847 argp++; 848 savep = argp; 849 toolong = 0; 850 cp = elemcopy; 851 if (strchr(T_SEP, *argp) == NULL) { 852 endp = elemcopy + sizeof(elemcopy) - 1; 853 while (*argp != '\0' && cp <= endp && 854 strchr(W_SEP T_SEP, *argp) == NULL) 855 *cp++ = *argp++; 856 if (cp > endp) 857 toolong = 1; 858 } 859 if (!toolong) { 860 *cp = '\0'; 861 /* 862 * Add this single element to the given list. 863 */ 864 inf->addelem(inf, elemcopy); 865 } else { 866 /* 867 * The string is too long to copy. Find the end 868 * of the string to print out the warning message. 869 */ 870 while (*argp != '\0' && strchr(W_SEP T_SEP, 871 *argp) == NULL) 872 argp++; 873 warnx("Value too long: %.*s", (int)(argp - savep), 874 savep); 875 optfatal = 1; 876 } 877 /* 878 * Skip over any number of trailing whitespace characters, 879 * but only one (at most) trailing element-terminating 880 * character. 881 */ 882 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 883 argp++; 884 if (*argp != '\0' && strchr(T_SEP, *argp) != NULL) { 885 argp++; 886 /* Catch case where string ended with a comma. */ 887 if (*argp == '\0') 888 inf->addelem(inf, argp); 889 } 890 } 891} 892 893static void * 894expand_list(struct listinfo *inf) 895{ 896 void *newlist; 897 int newmax; 898 899 newmax = (inf->maxcount + 1) << 1; 900 newlist = realloc(inf->l.ptr, newmax * inf->elemsize); 901 if (newlist == NULL) { 902 free(inf->l.ptr); 903 errx(1, "realloc to %d %ss failed", newmax, inf->lname); 904 } 905 inf->maxcount = newmax; 906 inf->l.ptr = newlist; 907 908 return (newlist); 909} 910 911static void 912free_list(struct listinfo *inf) 913{ 914 915 inf->count = inf->elemsize = inf->maxcount = 0; 916 if (inf->l.ptr != NULL) 917 free(inf->l.ptr); 918 inf->addelem = NULL; 919 inf->lname = NULL; 920 inf->l.ptr = NULL; 921} 922 923static void 924init_list(struct listinfo *inf, addelem_rtn artn, int elemsize, 925 const char *lname) 926{ 927 928 inf->count = inf->maxcount = 0; 929 inf->elemsize = elemsize; 930 inf->addelem = artn; 931 inf->lname = lname; 932 inf->l.ptr = NULL; 933} 934 935VARENT * 936find_varentry(VAR *v) 937{ 938 struct varent *vent; 939 940 STAILQ_FOREACH(vent, &varlist, next_ve) { 941 if (strcmp(vent->var->name, v->name) == 0) 942 return vent; 943 } 944 return NULL; 945} 946 947static void 948scanvars(void) 949{ 950 struct varent *vent; 951 VAR *v; 952 953 STAILQ_FOREACH(vent, &varlist, next_ve) { 954 v = vent->var; 955 if (v->flag & DSIZ) { 956 v->dwidth = v->width; 957 v->width = 0; 958 } 959 if (v->flag & USER) 960 needuser = 1; 961 if (v->flag & COMM) 962 needcomm = 1; 963 } 964} 965 966static void 967dynsizevars(KINFO *ki) 968{ 969 struct varent *vent; 970 VAR *v; 971 int i; 972 973 STAILQ_FOREACH(vent, &varlist, next_ve) { 974 v = vent->var; 975 if (!(v->flag & DSIZ)) 976 continue; 977 i = (v->sproc)( ki); 978 if (v->width < i) 979 v->width = i; 980 if (v->width > v->dwidth) 981 v->width = v->dwidth; 982 } 983} 984 985static void 986sizevars(void) 987{ 988 struct varent *vent; 989 VAR *v; 990 int i; 991 992 STAILQ_FOREACH(vent, &varlist, next_ve) { 993 v = vent->var; 994 i = strlen(vent->header); 995 if (v->width < i) 996 v->width = i; 997 totwidth += v->width + 1; /* +1 for space */ 998 } 999 totwidth--; 1000} 1001 1002static const char * 1003fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki, 1004 char *comm, int maxlen) 1005{ 1006 const char *s; 1007 1008 s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen); 1009 return (s); 1010} 1011 1012#define UREADOK(ki) (forceuread || (ki->ki_p->ki_flag & P_INMEM)) 1013 1014static void 1015saveuser(KINFO *ki) 1016{ 1017 1018 if (ki->ki_p->ki_flag & P_INMEM) { 1019 /* 1020 * The u-area might be swapped out, and we can't get 1021 * at it because we have a crashdump and no swap. 1022 * If it's here fill in these fields, otherwise, just 1023 * leave them 0. 1024 */ 1025 ki->ki_valid = 1; 1026 } else 1027 ki->ki_valid = 0; 1028 /* 1029 * save arguments if needed 1030 */ 1031 if (needcomm) { 1032 if (ki->ki_p->ki_stat == SZOMB) 1033 ki->ki_args = strdup("<defunct>"); 1034 else if (UREADOK(ki) || (ki->ki_p->ki_args != NULL)) 1035 ki->ki_args = strdup(fmt(kvm_getargv, ki, 1036 ki->ki_p->ki_comm, MAXCOMLEN)); 1037 else 1038 asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm); 1039 if (ki->ki_args == NULL) 1040 errx(1, "malloc failed"); 1041 } else { 1042 ki->ki_args = NULL; 1043 } 1044 if (needenv) { 1045 if (UREADOK(ki)) 1046 ki->ki_env = strdup(fmt(kvm_getenvv, ki, 1047 (char *)NULL, 0)); 1048 else 1049 ki->ki_env = strdup("()"); 1050 if (ki->ki_env == NULL) 1051 errx(1, "malloc failed"); 1052 } else { 1053 ki->ki_env = NULL; 1054 } 1055} 1056 1057/* A macro used to improve the readability of pscomp(). */ 1058#define DIFF_RETURN(a, b, field) do { \ 1059 if ((a)->field != (b)->field) \ 1060 return (((a)->field < (b)->field) ? -1 : 1); \ 1061} while (0) 1062 1063static int 1064pscomp(const void *a, const void *b) 1065{ 1066 const KINFO *ka, *kb; 1067 1068 ka = a; 1069 kb = b; 1070 /* SORTCPU and SORTMEM are sorted in descending order. */ 1071 if (sortby == SORTCPU) 1072 DIFF_RETURN(kb, ka, ki_pcpu); 1073 if (sortby == SORTMEM) 1074 DIFF_RETURN(kb, ka, ki_memsize); 1075 /* 1076 * TTY's are sorted in ascending order, except that all NODEV 1077 * processes come before all processes with a device. 1078 */ 1079 if (ka->ki_p->ki_tdev != kb->ki_p->ki_tdev) { 1080 if (ka->ki_p->ki_tdev == NODEV) 1081 return (-1); 1082 if (kb->ki_p->ki_tdev == NODEV) 1083 return (1); 1084 DIFF_RETURN(ka, kb, ki_p->ki_tdev); 1085 } 1086 1087 /* PID's and TID's (threads) are sorted in ascending order. */ 1088 DIFF_RETURN(ka, kb, ki_p->ki_pid); 1089 DIFF_RETURN(ka, kb, ki_p->ki_tid); 1090 return (0); 1091} 1092#undef DIFF_RETURN 1093 1094/* 1095 * ICK (all for getopt), would rather hide the ugliness 1096 * here than taint the main code. 1097 * 1098 * ps foo -> ps -foo 1099 * ps 34 -> ps -p34 1100 * 1101 * The old convention that 't' with no trailing tty arg means the users 1102 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 1103 * feature is available with the option 'T', which takes no argument. 1104 */ 1105static char * 1106kludge_oldps_options(const char *optlist, char *origval, const char *nextarg) 1107{ 1108 size_t len; 1109 char *argp, *cp, *newopts, *ns, *optp, *pidp; 1110 1111 /* 1112 * See if the original value includes any option which takes an 1113 * argument (and will thus use up the remainder of the string). 1114 */ 1115 argp = NULL; 1116 if (optlist != NULL) { 1117 for (cp = origval; *cp != '\0'; cp++) { 1118 optp = strchr(optlist, *cp); 1119 if ((optp != NULL) && *(optp + 1) == ':') { 1120 argp = cp; 1121 break; 1122 } 1123 } 1124 } 1125 if (argp != NULL && *origval == '-') 1126 return (origval); 1127 1128 /* 1129 * if last letter is a 't' flag with no argument (in the context 1130 * of the oldps options -- option string NOT starting with a '-' -- 1131 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 1132 * 1133 * However, if a flag accepting a string argument is found earlier 1134 * in the option string (including a possible `t' flag), then the 1135 * remainder of the string must be the argument to that flag; so 1136 * do not modify that argument. Note that a trailing `t' would 1137 * cause argp to be set, if argp was not already set by some 1138 * earlier option. 1139 */ 1140 len = strlen(origval); 1141 cp = origval + len - 1; 1142 pidp = NULL; 1143 if (*cp == 't' && *origval != '-' && cp == argp) { 1144 if (nextarg == NULL || *nextarg == '-' || isdigitch(*nextarg)) 1145 *cp = 'T'; 1146 } else if (argp == NULL) { 1147 /* 1148 * The original value did not include any option which takes 1149 * an argument (and that would include `p' and `t'), so check 1150 * the value for trailing number, or comma-separated list of 1151 * numbers, which we will treat as a pid request. 1152 */ 1153 if (isdigitch(*cp)) { 1154 while (cp >= origval && (*cp == ',' || isdigitch(*cp))) 1155 --cp; 1156 pidp = cp + 1; 1157 } 1158 } 1159 1160 /* 1161 * If nothing needs to be added to the string, then return 1162 * the "original" (although possibly modified) value. 1163 */ 1164 if (*origval == '-' && pidp == NULL) 1165 return (origval); 1166 1167 /* 1168 * Create a copy of the string to add '-' and/or 'p' to the 1169 * original value. 1170 */ 1171 if ((newopts = ns = malloc(len + 3)) == NULL) 1172 errx(1, "malloc failed"); 1173 1174 if (*origval != '-') 1175 *ns++ = '-'; /* add option flag */ 1176 1177 if (pidp == NULL) 1178 strcpy(ns, origval); 1179 else { 1180 /* 1181 * Copy everything before the pid string, add the `p', 1182 * and then copy the pid string. 1183 */ 1184 len = pidp - origval; 1185 memcpy(ns, origval, len); 1186 ns += len; 1187 *ns++ = 'p'; 1188 strcpy(ns, pidp); 1189 } 1190 1191 return (newopts); 1192} 1193 1194static int 1195check_procfs(void) 1196{ 1197 struct statfs mnt; 1198 1199 if (statfs("/proc", &mnt) < 0) 1200 return (0); 1201 if (strcmp(mnt.f_fstypename, "procfs") != 0) 1202 return (0); 1203 return (1); 1204} 1205 1206static void 1207usage(void) 1208{ 1209#define SINGLE_OPTS "[-aCce" OPT_LAZY_f "HhjlmrSTuvwXxZ]" 1210 1211 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 1212 "usage: ps " SINGLE_OPTS " [-O fmt | -o fmt] [-G gid[,gid...]]", 1213 " [-M core] [-N system]", 1214 " [-p pid[,pid...]] [-t tty[,tty...]] [-U user[,user...]]", 1215 " ps [-L]"); 1216 exit(1); 1217} 1218