ps.c revision 130973
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 130973 2004-06-23 11:40:56Z gad $"); 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 59#include <ctype.h> 60#include <err.h> 61#include <errno.h> 62#include <fcntl.h> 63#include <grp.h> 64#include <kvm.h> 65#include <limits.h> 66#include <locale.h> 67#include <paths.h> 68#include <pwd.h> 69#include <stdio.h> 70#include <stdlib.h> 71#include <string.h> 72#include <unistd.h> 73 74#include "ps.h" 75 76#define W_SEP " \t" /* "Whitespace" list separators */ 77#define T_SEP "," /* "Terminate-element" list separators */ 78 79#ifdef LAZY_PS 80#define DEF_UREAD 0 81#define OPT_LAZY_f "f" 82#else 83#define DEF_UREAD 1 /* Always do the more-expensive read. */ 84#define OPT_LAZY_f /* I.e., the `-f' option is not added. */ 85#endif 86 87/* 88 * isdigit takes an `int', but expects values in the range of unsigned char. 89 * This wrapper ensures that values from a 'char' end up in the correct range. 90 */ 91#define isdigitch(Anychar) isdigit((u_char)(Anychar)) 92 93int cflag; /* -c */ 94int eval; /* Exit value */ 95time_t now; /* Current time(3) value */ 96int rawcpu; /* -C */ 97int sumrusage; /* -S */ 98int termwidth; /* Width of the screen (0 == infinity). */ 99int totwidth; /* Calculated-width of requested variables. */ 100 101struct varent *vhead; 102 103static int forceuread = DEF_UREAD; /* Do extra work to get u-area. */ 104static kvm_t *kd; 105static KINFO *kinfo; 106static int needcomm; /* -o "command" */ 107static int needenv; /* -e */ 108static int needuser; /* -o "user" */ 109static int optfatal; /* Fatal error parsing some list-option. */ 110 111static enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 112 113struct listinfo; 114typedef int addelem_rtn(struct listinfo *_inf, const char *_elem); 115 116struct listinfo { 117 int count; 118 int maxcount; 119 int elemsize; 120 addelem_rtn *addelem; 121 const char *lname; 122 union { 123 gid_t *gids; 124 pid_t *pids; 125 dev_t *ttys; 126 uid_t *uids; 127 void *ptr; 128 } l; 129}; 130 131static int addelem_gid(struct listinfo *, const char *); 132static int addelem_pid(struct listinfo *, const char *); 133static int addelem_tty(struct listinfo *, const char *); 134static int addelem_uid(struct listinfo *, const char *); 135static void add_list(struct listinfo *, const char *); 136static void dynsizevars(KINFO *); 137static void *expand_list(struct listinfo *); 138static const char * 139 fmt(char **(*)(kvm_t *, const struct kinfo_proc *, int), 140 KINFO *, char *, int); 141static void free_list(struct listinfo *); 142static void init_list(struct listinfo *, addelem_rtn, int, const char *); 143static char *kludge_oldps_options(const char *, char *, const char *); 144static int pscomp(const void *, const void *); 145static void saveuser(KINFO *); 146static void scanvars(void); 147static void sizevars(void); 148static void usage(void); 149 150static char dfmt[] = "pid,tt,state,time,command"; 151static char jfmt[] = "user,pid,ppid,pgid,sid,jobc,state,tt,time,command"; 152static char lfmt[] = "uid,pid,ppid,cpu,pri,nice,vsz,rss,mwchan,state," 153 "tt,time,command"; 154static char o1[] = "pid"; 155static char o2[] = "tt,state,time,command"; 156static char ufmt[] = "user,pid,%cpu,%mem,vsz,rss,tt,state,start,time,command"; 157static char vfmt[] = "pid,state,time,sl,re,pagein,vsz,rss,lim,tsiz," 158 "%cpu,%mem,command"; 159static char Zfmt[] = "label"; 160 161#define PS_ARGS "AaCce" OPT_LAZY_f "G:gHhjLlM:mN:O:o:p:rSTt:U:uvwXxZ" 162 163int 164main(int argc, char *argv[]) 165{ 166 struct listinfo gidlist, pgrplist, pidlist; 167 struct listinfo ruidlist, sesslist, ttylist, uidlist; 168 struct kinfo_proc *kp; 169 KINFO *next_KINFO; 170 struct varent *vent; 171 struct winsize ws; 172 const char *nlistf, *memf; 173 char *cols; 174 int all, ch, dropgid, elem, flag, _fmt, i, lineno; 175 int nentries, nkept, nselectors; 176 int prtheader, showthreads, wflag, what, xkeep, xkeep_implied; 177 char errbuf[_POSIX2_LINE_MAX]; 178 179 (void) setlocale(LC_ALL, ""); 180 time(&now); /* Used by routines in print.c. */ 181 182 if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0') 183 termwidth = atoi(cols); 184 else if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 185 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 186 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 187 ws.ws_col == 0) 188 termwidth = 79; 189 else 190 termwidth = ws.ws_col - 1; 191 192 /* 193 * Hide a number of option-processing kludges in a separate routine, 194 * to support some historical BSD behaviors, such as `ps axu'. 195 */ 196 if (argc > 1) 197 argv[1] = kludge_oldps_options(PS_ARGS, argv[1], argv[2]); 198 199 all = dropgid = _fmt = nselectors = optfatal = 0; 200 prtheader = showthreads = wflag = xkeep_implied = 0; 201 xkeep = -1; /* Neither -x nor -X. */ 202 init_list(&gidlist, addelem_gid, sizeof(gid_t), "group"); 203 init_list(&pgrplist, addelem_pid, sizeof(pid_t), "process group"); 204 init_list(&pidlist, addelem_pid, sizeof(pid_t), "process id"); 205 init_list(&ruidlist, addelem_uid, sizeof(uid_t), "ruser"); 206 init_list(&sesslist, addelem_pid, sizeof(pid_t), "session id"); 207 init_list(&ttylist, addelem_tty, sizeof(dev_t), "tty"); 208 init_list(&uidlist, addelem_uid, sizeof(uid_t), "user"); 209 memf = nlistf = _PATH_DEVNULL; 210 while ((ch = getopt(argc, argv, PS_ARGS)) != -1) 211 switch ((char)ch) { 212 case 'A': 213 /* 214 * Exactly the same as `-ax'. This has been 215 * added for compatability with SUSv3, but for 216 * now it will not be described in the man page. 217 */ 218 nselectors++; 219 all = xkeep = 1; 220 break; 221 case 'a': 222 nselectors++; 223 all = 1; 224 break; 225 case 'C': 226 rawcpu = 1; 227 break; 228 case 'c': 229 cflag = 1; 230 break; 231 case 'e': /* XXX set ufmt */ 232 needenv = 1; 233 break; 234#ifdef LAZY_PS 235 case 'f': 236 if (getuid() == 0 || getgid() == 0) 237 forceuread = 1; 238 break; 239#endif 240 case 'G': 241 add_list(&gidlist, optarg); 242 xkeep_implied = 1; 243 nselectors++; 244 break; 245 case 'g': 246#if 0 247 /*- 248 * XXX - This SUSv3 behavior is still under debate 249 * since it conflicts with the (undocumented) 250 * `-g' option. So we skip it for now. 251 */ 252 add_list(&pgrplist, optarg); 253 xkeep_implied = 1; 254 nselectors++; 255 break; 256#else 257 /* The historical BSD-ish (from SunOS) behavior. */ 258 break; /* no-op */ 259#endif 260 case 'H': 261 showthreads = KERN_PROC_INC_THREAD; 262 break; 263 case 'h': 264 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 265 break; 266 case 'j': 267 parsefmt(jfmt, 0); 268 _fmt = 1; 269 jfmt[0] = '\0'; 270 break; 271 case 'L': 272 showkey(); 273 exit(0); 274 case 'l': 275 parsefmt(lfmt, 0); 276 _fmt = 1; 277 lfmt[0] = '\0'; 278 break; 279 case 'M': 280 memf = optarg; 281 dropgid = 1; 282 break; 283 case 'm': 284 sortby = SORTMEM; 285 break; 286 case 'N': 287 nlistf = optarg; 288 dropgid = 1; 289 break; 290 case 'O': 291 parsefmt(o1, 1); 292 parsefmt(optarg, 1); 293 parsefmt(o2, 1); 294 o1[0] = o2[0] = '\0'; 295 _fmt = 1; 296 break; 297 case 'o': 298 parsefmt(optarg, 1); 299 _fmt = 1; 300 break; 301 case 'p': 302 add_list(&pidlist, optarg); 303 /* 304 * Note: `-p' does not *set* xkeep, but any values 305 * from pidlist are checked before xkeep is. That 306 * way they are always matched, even if the user 307 * specifies `-X'. 308 */ 309 nselectors++; 310 break; 311#if 0 312 case 'R': 313 /*- 314 * XXX - This un-standard option is still under 315 * debate. This is what SUSv3 defines as 316 * the `-U' option, and while it would be 317 * nice to have, it could cause even more 318 * confusion to implement it as `-R'. 319 */ 320 add_list(&ruidlist, optarg); 321 xkeep_implied = 1; 322 nselectors++; 323 break; 324#endif 325 case 'r': 326 sortby = SORTCPU; 327 break; 328 case 'S': 329 sumrusage = 1; 330 break; 331#if 0 332 case 's': 333 /*- 334 * XXX - This non-standard option is still under 335 * debate. This *is* supported on Solaris, 336 * Linux, and IRIX, but conflicts with `-s' 337 * on NetBSD and maybe some older BSD's. 338 */ 339 add_list(&sesslist, optarg); 340 xkeep_implied = 1; 341 nselectors++; 342 break; 343#endif 344 case 'T': 345 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 346 errx(1, "stdin: not a terminal"); 347 /* FALLTHROUGH */ 348 case 't': 349 add_list(&ttylist, optarg); 350 xkeep_implied = 1; 351 nselectors++; 352 break; 353 case 'U': 354 /* This is what SUSv3 defines as the `-u' option. */ 355 add_list(&uidlist, optarg); 356 xkeep_implied = 1; 357 nselectors++; 358 break; 359 case 'u': 360 parsefmt(ufmt, 0); 361 sortby = SORTCPU; 362 _fmt = 1; 363 ufmt[0] = '\0'; 364 break; 365 case 'v': 366 parsefmt(vfmt, 0); 367 sortby = SORTMEM; 368 _fmt = 1; 369 vfmt[0] = '\0'; 370 break; 371 case 'w': 372 if (wflag) 373 termwidth = UNLIMITED; 374 else if (termwidth < 131) 375 termwidth = 131; 376 wflag++; 377 break; 378 case 'X': 379 /* 380 * Note that `-X' and `-x' are not standard "selector" 381 * options. For most selector-options, we check *all* 382 * processes to see if any are matched by the given 383 * value(s). After we have a set of all the matched 384 * processes, then `-X' and `-x' govern whether we 385 * modify that *matched* set for processes which do 386 * not have a controlling terminal. `-X' causes 387 * those processes to be deleted from the matched 388 * set, while `-x' causes them to be kept. 389 */ 390 xkeep = 0; 391 break; 392 case 'x': 393 xkeep = 1; 394 break; 395 case 'Z': 396 parsefmt(Zfmt, 0); 397 Zfmt[0] = '\0'; 398 break; 399 case '?': 400 default: 401 usage(); 402 } 403 argc -= optind; 404 argv += optind; 405 406 /* 407 * If there arguments after processing all the options, attempt 408 * to treat them as a list of process ids. 409 */ 410 while (*argv) { 411 if (!isdigitch(**argv)) 412 break; 413 add_list(&pidlist, *argv); 414 argv++; 415 } 416 if (*argv) { 417 fprintf(stderr, "%s: illegal argument: %s\n", 418 getprogname(), *argv); 419 usage(); 420 } 421 if (optfatal) 422 exit(1); /* Error messages already printed. */ 423 if (xkeep < 0) /* Neither -X nor -x was specified. */ 424 xkeep = xkeep_implied; 425 426 427 /* 428 * Discard setgid privileges if not the running kernel so that bad 429 * guys can't print interesting stuff from kernel memory. 430 */ 431 if (dropgid) 432 setgid(getgid()); 433 434 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 435 if (kd == 0) 436 errx(1, "%s", errbuf); 437 438 if (!_fmt) 439 parsefmt(dfmt, 0); 440 441 if (nselectors == 0) { 442 uidlist.l.ptr = malloc(sizeof(uid_t)); 443 if (uidlist.l.ptr == NULL) 444 errx(1, "malloc failed"); 445 nselectors = 1; 446 uidlist.count = uidlist.maxcount = 1; 447 *uidlist.l.uids = getuid(); 448 } 449 450 /* 451 * scan requested variables, noting what structures are needed, 452 * and adjusting header widths as appropriate. 453 */ 454 scanvars(); 455 456 /* 457 * Get process list. If the user requested just one selector- 458 * option, then kvm_getprocs can be asked to return just those 459 * processes. Otherwise, have it return all processes, and 460 * then this routine will search that full list and select the 461 * processes which match any of the user's selector-options. 462 */ 463 what = showthreads != 0 ? KERN_PROC_ALL : KERN_PROC_PROC; 464 flag = 0; 465 if (nselectors == 1) { 466 if (gidlist.count == 1) { 467 what = KERN_PROC_RGID | showthreads; 468 flag = *gidlist.l.gids; 469 nselectors = 0; 470 } else if (pgrplist.count == 1) { 471 what = KERN_PROC_PGRP | showthreads; 472 flag = *pgrplist.l.pids; 473 nselectors = 0; 474 } else if (pidlist.count == 1) { 475 what = KERN_PROC_PID | showthreads; 476 flag = *pidlist.l.pids; 477 nselectors = 0; 478 } else if (ruidlist.count == 1) { 479 what = KERN_PROC_RUID | showthreads; 480 flag = *ruidlist.l.uids; 481 nselectors = 0; 482 } else if (sesslist.count == 1) { 483 what = KERN_PROC_SESSION | showthreads; 484 flag = *sesslist.l.pids; 485 nselectors = 0; 486 } else if (ttylist.count == 1) { 487 what = KERN_PROC_TTY | showthreads; 488 flag = *ttylist.l.ttys; 489 nselectors = 0; 490 } else if (uidlist.count == 1) { 491 what = KERN_PROC_UID | showthreads; 492 flag = *uidlist.l.uids; 493 nselectors = 0; 494 } else if (all) { 495 /* No need for this routine to select processes. */ 496 nselectors = 0; 497 } 498 } 499 500 /* 501 * select procs 502 */ 503 nentries = -1; 504 kp = kvm_getprocs(kd, what, flag, &nentries); 505 if ((kp == NULL && nentries > 0) || (kp != NULL && nentries < 0)) 506 errx(1, "%s", kvm_geterr(kd)); 507 nkept = 0; 508 if (nentries > 0) { 509 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 510 errx(1, "malloc failed"); 511 for (i = nentries; --i >= 0; ++kp) { 512 /* 513 * If the user specified multiple selection-criteria, 514 * then keep any process matched by the inclusive OR 515 * of all the selection-criteria given. 516 */ 517 if (pidlist.count > 0) { 518 for (elem = 0; elem < pidlist.count; elem++) 519 if (kp->ki_pid == pidlist.l.pids[elem]) 520 goto keepit; 521 } 522 /* 523 * Note that we had to process pidlist before 524 * filtering out processes which do not have 525 * a controlling terminal. 526 */ 527 if (xkeep == 0) { 528 if ((kp->ki_tdev == NODEV || 529 (kp->ki_flag & P_CONTROLT) == 0)) 530 continue; 531 } 532 if (nselectors == 0) 533 goto keepit; 534 if (gidlist.count > 0) { 535 for (elem = 0; elem < gidlist.count; elem++) 536 if (kp->ki_rgid == gidlist.l.gids[elem]) 537 goto keepit; 538 } 539 if (pgrplist.count > 0) { 540 for (elem = 0; elem < pgrplist.count; elem++) 541 if (kp->ki_pgid == 542 pgrplist.l.pids[elem]) 543 goto keepit; 544 } 545 if (ruidlist.count > 0) { 546 for (elem = 0; elem < ruidlist.count; elem++) 547 if (kp->ki_ruid == 548 ruidlist.l.uids[elem]) 549 goto keepit; 550 } 551 if (sesslist.count > 0) { 552 for (elem = 0; elem < sesslist.count; elem++) 553 if (kp->ki_sid == sesslist.l.pids[elem]) 554 goto keepit; 555 } 556 if (ttylist.count > 0) { 557 for (elem = 0; elem < ttylist.count; elem++) 558 if (kp->ki_tdev == ttylist.l.ttys[elem]) 559 goto keepit; 560 } 561 if (uidlist.count > 0) { 562 for (elem = 0; elem < uidlist.count; elem++) 563 if (kp->ki_uid == uidlist.l.uids[elem]) 564 goto keepit; 565 } 566 /* 567 * This process did not match any of the user's 568 * selector-options, so skip the process. 569 */ 570 continue; 571 572 keepit: 573 next_KINFO = &kinfo[nkept]; 574 next_KINFO->ki_p = kp; 575 next_KINFO->ki_pcpu = getpcpu(next_KINFO); 576 if (sortby == SORTMEM) 577 next_KINFO->ki_memsize = kp->ki_tsize + 578 kp->ki_dsize + kp->ki_ssize; 579 if (needuser) 580 saveuser(next_KINFO); 581 dynsizevars(next_KINFO); 582 nkept++; 583 } 584 } 585 586 sizevars(); 587 588 /* 589 * print header 590 */ 591 printheader(); 592 if (nkept == 0) 593 exit(1); 594 595 /* 596 * sort proc list 597 */ 598 qsort(kinfo, nkept, sizeof(KINFO), pscomp); 599 /* 600 * For each process, call each variable output function. 601 */ 602 for (i = lineno = 0; i < nkept; i++) { 603 for (vent = vhead; vent; vent = vent->next) { 604 (vent->var->oproc)(&kinfo[i], vent); 605 if (vent->next != NULL) 606 (void)putchar(' '); 607 } 608 (void)putchar('\n'); 609 if (prtheader && lineno++ == prtheader - 4) { 610 (void)putchar('\n'); 611 printheader(); 612 lineno = 0; 613 } 614 } 615 free_list(&gidlist); 616 free_list(&pidlist); 617 free_list(&pgrplist); 618 free_list(&ruidlist); 619 free_list(&sesslist); 620 free_list(&ttylist); 621 free_list(&uidlist); 622 623 exit(eval); 624} 625 626static int 627addelem_gid(struct listinfo *inf, const char *elem) 628{ 629 struct group *grp; 630 const char *nameorID; 631 char *endp; 632 u_long bigtemp; 633 634 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 635 if (*elem == '\0') 636 warnx("Invalid (zero-length) %s name", inf->lname); 637 else 638 warnx("%s name too long: %s", inf->lname, elem); 639 optfatal = 1; 640 return (0); /* Do not add this value. */ 641 } 642 643 /* 644 * SUSv3 states that `ps -G grouplist' should match "real-group 645 * ID numbers", and does not mention group-names. I do want to 646 * also support group-names, so this tries for a group-id first, 647 * and only tries for a name if that doesn't work. This is the 648 * opposite order of what is done in addelem_uid(), but in 649 * practice the order would only matter for group-names which 650 * are all-numeric. 651 */ 652 grp = NULL; 653 nameorID = "named"; 654 errno = 0; 655 bigtemp = strtoul(elem, &endp, 10); 656 if (errno == 0 && *endp == '\0' && bigtemp <= GID_MAX) { 657 nameorID = "name or ID matches"; 658 grp = getgrgid((gid_t)bigtemp); 659 } 660 if (grp == NULL) 661 grp = getgrnam(elem); 662 if (grp == NULL) { 663 warnx("No %s %s '%s'", inf->lname, nameorID, elem); 664 optfatal = 1; 665 return (0); 666 } 667 if (inf->count >= inf->maxcount) 668 expand_list(inf); 669 inf->l.gids[(inf->count)++] = grp->gr_gid; 670 return (1); 671} 672 673#define BSD_PID_MAX 99999 /* Copy of PID_MAX from sys/proc.h. */ 674static int 675addelem_pid(struct listinfo *inf, const char *elem) 676{ 677 char *endp; 678 long tempid; 679 680 if (*elem == '\0') { 681 warnx("Invalid (zero-length) process id"); 682 optfatal = 1; 683 return (0); /* Do not add this value. */ 684 } 685 686 errno = 0; 687 tempid = strtol(elem, &endp, 10); 688 if (*endp != '\0' || tempid < 0 || elem == endp) { 689 warnx("Invalid %s: %s", inf->lname, elem); 690 errno = ERANGE; 691 } else if (errno != 0 || tempid > BSD_PID_MAX) { 692 warnx("%s too large: %s", inf->lname, elem); 693 errno = ERANGE; 694 } 695 if (errno == ERANGE) { 696 optfatal = 1; 697 return (0); 698 } 699 if (inf->count >= inf->maxcount) 700 expand_list(inf); 701 inf->l.pids[(inf->count)++] = tempid; 702 return (1); 703} 704#undef BSD_PID_MAX 705 706static int 707addelem_tty(struct listinfo *inf, const char *elem) 708{ 709 const char *ttypath; 710 struct stat sb; 711 char pathbuf[PATH_MAX]; 712 713 if (strcmp(elem, "co") == 0) 714 ttypath = strdup(_PATH_CONSOLE); 715 else if (*elem == '/') 716 ttypath = elem; 717 else { 718 strlcpy(pathbuf, _PATH_TTY, sizeof(pathbuf)); 719 strlcat(pathbuf, elem, sizeof(pathbuf)); 720 ttypath = pathbuf; 721 } 722 723 if (stat(ttypath, &sb) == -1) { 724 warn("%s", ttypath); 725 optfatal = 1; 726 return (0); 727 } 728 if (!S_ISCHR(sb.st_mode)) { 729 warn("%s: Not a terminal", ttypath); 730 optfatal = 1; 731 return (0); 732 } 733 if (inf->count >= inf->maxcount) 734 expand_list(inf); 735 inf->l.ttys[(inf->count)++] = sb.st_rdev; 736 return (1); 737} 738 739static int 740addelem_uid(struct listinfo *inf, const char *elem) 741{ 742 struct passwd *pwd; 743 char *endp; 744 u_long bigtemp; 745 746 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 747 if (*elem == '\0') 748 warnx("Invalid (zero-length) %s name", inf->lname); 749 else 750 warnx("%s name too long: %s", inf->lname, elem); 751 optfatal = 1; 752 return (0); /* Do not add this value. */ 753 } 754 755 pwd = getpwnam(elem); 756 if (pwd == NULL) { 757 errno = 0; 758 bigtemp = strtoul(elem, &endp, 10); 759 if (errno != 0 || *endp != '\0' || bigtemp > UID_MAX) 760 warnx("No %s named '%s'", inf->lname, elem); 761 else { 762 /* The string is all digits, so it might be a userID. */ 763 pwd = getpwuid((uid_t)bigtemp); 764 if (pwd == NULL) 765 warnx("No %s name or ID matches '%s'", 766 inf->lname, elem); 767 } 768 } 769 if (pwd == NULL) { 770 /* 771 * These used to be treated as minor warnings (and the 772 * option was simply ignored), but now they are fatal 773 * errors (and the command will be aborted). 774 */ 775 optfatal = 1; 776 return (0); 777 } 778 if (inf->count >= inf->maxcount) 779 expand_list(inf); 780 inf->l.uids[(inf->count)++] = pwd->pw_uid; 781 return (1); 782} 783 784static void 785add_list(struct listinfo *inf, const char *argp) 786{ 787 const char *savep; 788 char *cp, *endp; 789 int toolong; 790 char elemcopy[PATH_MAX]; 791 792 if (*argp == 0) 793 inf->addelem(inf, elemcopy); 794 while (*argp != '\0') { 795 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 796 argp++; 797 savep = argp; 798 toolong = 0; 799 cp = elemcopy; 800 if (strchr(T_SEP, *argp) == NULL) { 801 endp = elemcopy + sizeof(elemcopy) - 1; 802 while (*argp != '\0' && cp <= endp && 803 strchr(W_SEP T_SEP, *argp) == NULL) 804 *cp++ = *argp++; 805 if (cp > endp) 806 toolong = 1; 807 } 808 if (!toolong) { 809 *cp = '\0'; 810 /* 811 * Add this single element to the given list. 812 */ 813 inf->addelem(inf, elemcopy); 814 } else { 815 /* 816 * The string is too long to copy. Find the end 817 * of the string to print out the warning message. 818 */ 819 while (*argp != '\0' && strchr(W_SEP T_SEP, 820 *argp) == NULL) 821 argp++; 822 warnx("Value too long: %.*s", (int)(argp - savep), 823 savep); 824 optfatal = 1; 825 } 826 /* 827 * Skip over any number of trailing whitespace characters, 828 * but only one (at most) trailing element-terminating 829 * character. 830 */ 831 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 832 argp++; 833 if (*argp != '\0' && strchr(T_SEP, *argp) != NULL) { 834 argp++; 835 /* Catch case where string ended with a comma. */ 836 if (*argp == '\0') 837 inf->addelem(inf, argp); 838 } 839 } 840} 841 842static void * 843expand_list(struct listinfo *inf) 844{ 845 void *newlist; 846 int newmax; 847 848 newmax = (inf->maxcount + 1) << 1; 849 newlist = realloc(inf->l.ptr, newmax * inf->elemsize); 850 if (newlist == NULL) { 851 free(inf->l.ptr); 852 errx(1, "realloc to %d %ss failed", newmax, inf->lname); 853 } 854 inf->maxcount = newmax; 855 inf->l.ptr = newlist; 856 857 return (newlist); 858} 859 860static void 861free_list(struct listinfo *inf) 862{ 863 864 inf->count = inf->elemsize = inf->maxcount = 0; 865 if (inf->l.ptr != NULL) 866 free(inf->l.ptr); 867 inf->addelem = NULL; 868 inf->lname = NULL; 869 inf->l.ptr = NULL; 870} 871 872static void 873init_list(struct listinfo *inf, addelem_rtn artn, int elemsize, 874 const char *lname) 875{ 876 877 inf->count = inf->maxcount = 0; 878 inf->elemsize = elemsize; 879 inf->addelem = artn; 880 inf->lname = lname; 881 inf->l.ptr = NULL; 882} 883 884VARENT * 885find_varentry(VAR *v) 886{ 887 struct varent *vent; 888 889 for (vent = vhead; vent; vent = vent->next) { 890 if (strcmp(vent->var->name, v->name) == 0) 891 return vent; 892 } 893 return NULL; 894} 895 896static void 897scanvars(void) 898{ 899 struct varent *vent; 900 VAR *v; 901 902 for (vent = vhead; vent; vent = vent->next) { 903 v = vent->var; 904 if (v->flag & DSIZ) { 905 v->dwidth = v->width; 906 v->width = 0; 907 } 908 if (v->flag & USER) 909 needuser = 1; 910 if (v->flag & COMM) 911 needcomm = 1; 912 } 913} 914 915static void 916dynsizevars(KINFO *ki) 917{ 918 struct varent *vent; 919 VAR *v; 920 int i; 921 922 for (vent = vhead; vent; vent = vent->next) { 923 v = vent->var; 924 if (!(v->flag & DSIZ)) 925 continue; 926 i = (v->sproc)( ki); 927 if (v->width < i) 928 v->width = i; 929 if (v->width > v->dwidth) 930 v->width = v->dwidth; 931 } 932} 933 934static void 935sizevars(void) 936{ 937 struct varent *vent; 938 VAR *v; 939 int i; 940 941 for (vent = vhead; vent; vent = vent->next) { 942 v = vent->var; 943 i = strlen(vent->header); 944 if (v->width < i) 945 v->width = i; 946 totwidth += v->width + 1; /* +1 for space */ 947 } 948 totwidth--; 949} 950 951static const char * 952fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki, 953 char *comm, int maxlen) 954{ 955 const char *s; 956 957 s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen); 958 return (s); 959} 960 961#define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM)) 962 963static void 964saveuser(KINFO *ki) 965{ 966 967 if (ki->ki_p->ki_sflag & PS_INMEM) { 968 /* 969 * The u-area might be swapped out, and we can't get 970 * at it because we have a crashdump and no swap. 971 * If it's here fill in these fields, otherwise, just 972 * leave them 0. 973 */ 974 ki->ki_valid = 1; 975 } else 976 ki->ki_valid = 0; 977 /* 978 * save arguments if needed 979 */ 980 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 981 ki->ki_args = strdup(fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 982 MAXCOMLEN)); 983 } else if (needcomm) { 984 asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm); 985 } else { 986 ki->ki_args = NULL; 987 } 988 if (needenv && UREADOK(ki)) { 989 ki->ki_env = strdup(fmt(kvm_getenvv, ki, (char *)NULL, 0)); 990 } else if (needenv) { 991 ki->ki_env = malloc(3); 992 strcpy(ki->ki_env, "()"); 993 } else { 994 ki->ki_env = NULL; 995 } 996} 997 998/* A macro used to improve the readability of pscomp(). */ 999#define DIFF_RETURN(a, b, field) do { \ 1000 if ((a)->field != (b)->field) \ 1001 return (((a)->field < (b)->field) ? -1 : 1); \ 1002} while (0) 1003 1004static int 1005pscomp(const void *a, const void *b) 1006{ 1007 const KINFO *ka, *kb; 1008 1009 ka = a; 1010 kb = b; 1011 /* SORTCPU and SORTMEM are sorted in descending order. */ 1012 if (sortby == SORTCPU) 1013 DIFF_RETURN(kb, ka, ki_pcpu); 1014 if (sortby == SORTMEM) 1015 DIFF_RETURN(kb, ka, ki_memsize); 1016 /* 1017 * TTY's are sorted in ascending order, except that all NODEV 1018 * processes come before all processes with a device. 1019 */ 1020 if (ka->ki_p->ki_tdev != kb->ki_p->ki_tdev) { 1021 if (ka->ki_p->ki_tdev == NODEV) 1022 return (-1); 1023 if (kb->ki_p->ki_tdev == NODEV) 1024 return (1); 1025 DIFF_RETURN(ka, kb, ki_p->ki_tdev); 1026 } 1027 1028 /* PID's and TID's (threads) are sorted in ascending order. */ 1029 DIFF_RETURN(ka, kb, ki_p->ki_pid); 1030 DIFF_RETURN(ka, kb, ki_p->ki_tid); 1031 return (0); 1032} 1033#undef DIFF_RETURN 1034 1035/* 1036 * ICK (all for getopt), would rather hide the ugliness 1037 * here than taint the main code. 1038 * 1039 * ps foo -> ps -foo 1040 * ps 34 -> ps -p34 1041 * 1042 * The old convention that 't' with no trailing tty arg means the users 1043 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 1044 * feature is available with the option 'T', which takes no argument. 1045 */ 1046static char * 1047kludge_oldps_options(const char *optlist, char *origval, const char *nextarg) 1048{ 1049 size_t len; 1050 char *argp, *cp, *newopts, *ns, *optp, *pidp; 1051 1052 /* 1053 * See if the original value includes any option which takes an 1054 * argument (and will thus use up the remainder of the string). 1055 */ 1056 argp = NULL; 1057 if (optlist != NULL) { 1058 for (cp = origval; *cp != '\0'; cp++) { 1059 optp = strchr(optlist, *cp); 1060 if ((optp != NULL) && *(optp + 1) == ':') { 1061 argp = cp; 1062 break; 1063 } 1064 } 1065 } 1066 if (argp != NULL && *origval == '-') 1067 return (origval); 1068 1069 /* 1070 * if last letter is a 't' flag with no argument (in the context 1071 * of the oldps options -- option string NOT starting with a '-' -- 1072 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 1073 * 1074 * However, if a flag accepting a string argument is found earlier 1075 * in the option string (including a possible `t' flag), then the 1076 * remainder of the string must be the argument to that flag; so 1077 * do not modify that argument. Note that a trailing `t' would 1078 * cause argp to be set, if argp was not already set by some 1079 * earlier option. 1080 */ 1081 len = strlen(origval); 1082 cp = origval + len - 1; 1083 pidp = NULL; 1084 if (*cp == 't' && *origval != '-' && cp == argp) { 1085 if (nextarg == NULL || *nextarg == '-' || isdigitch(*nextarg)) 1086 *cp = 'T'; 1087 } else if (argp == NULL) { 1088 /* 1089 * The original value did not include any option which takes 1090 * an argument (and that would include `p' and `t'), so check 1091 * the value for trailing number, or comma-separated list of 1092 * numbers, which we will treat as a pid request. 1093 */ 1094 if (isdigitch(*cp)) { 1095 while (cp >= origval && (*cp == ',' || isdigitch(*cp))) 1096 --cp; 1097 pidp = cp + 1; 1098 } 1099 } 1100 1101 /* 1102 * If nothing needs to be added to the string, then return 1103 * the "original" (although possibly modified) value. 1104 */ 1105 if (*origval == '-' && pidp == NULL) 1106 return (origval); 1107 1108 /* 1109 * Create a copy of the string to add '-' and/or 'p' to the 1110 * original value. 1111 */ 1112 if ((newopts = ns = malloc(len + 3)) == NULL) 1113 errx(1, "malloc failed"); 1114 1115 if (*origval != '-') 1116 *ns++ = '-'; /* add option flag */ 1117 1118 if (pidp == NULL) 1119 strcpy(ns, origval); 1120 else { 1121 /* 1122 * Copy everything before the pid string, add the `p', 1123 * and then copy the pid string. 1124 */ 1125 len = pidp - origval; 1126 memcpy(ns, origval, len); 1127 ns += len; 1128 *ns++ = 'p'; 1129 strcpy(ns, pidp); 1130 } 1131 1132 return (newopts); 1133} 1134 1135static void 1136usage(void) 1137{ 1138#define SINGLE_OPTS "[-aCc" OPT_LAZY_f "HhjlmrSTuvwXxZ]" 1139 1140 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 1141 "usage: ps " SINGLE_OPTS " [-G gid[,gid]] [-O|o fmt]", 1142 " [-p pid[,pid]] [-t tty[,tty]] [-U user[,user]]", 1143 " [-M core] [-N system]", 1144 " ps [-L]"); 1145 exit(1); 1146} 1147