ps.c revision 127544
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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * ------+---------+---------+-------- + --------+---------+---------+---------* 33 * Copyright (c) 2004 - Garance Alistair Drosehn <gad@FreeBSD.org>. 34 * All rights reserved. 35 * 36 * Significant modifications made to bring `ps' options somewhat closer 37 * to the standard for `ps' as described in SingleUnixSpec-v3. 38 * ------+---------+---------+-------- + --------+---------+---------+---------* 39 */ 40 41#ifndef lint 42static const char copyright[] = 43"@(#) Copyright (c) 1990, 1993, 1994\n\ 44 The Regents of the University of California. All rights reserved.\n"; 45#endif /* not lint */ 46 47#if 0 48#ifndef lint 49static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 50#endif /* not lint */ 51#endif 52 53#include <sys/cdefs.h> 54__FBSDID("$FreeBSD: head/bin/ps/ps.c 127544 2004-03-29 01:18:13Z gad $"); 55 56#include <sys/param.h> 57#include <sys/user.h> 58#include <sys/stat.h> 59#include <sys/ioctl.h> 60#include <sys/sysctl.h> 61 62#include <ctype.h> 63#include <err.h> 64#include <errno.h> 65#include <fcntl.h> 66#include <grp.h> 67#include <kvm.h> 68#include <limits.h> 69#include <locale.h> 70#include <paths.h> 71#include <pwd.h> 72#include <stdint.h> 73#include <stdio.h> 74#include <stdlib.h> 75#include <string.h> 76#include <unistd.h> 77 78#include "ps.h" 79 80#define W_SEP " \t" /* "Whitespace" list separators */ 81#define T_SEP "," /* "Terminate-element" list separators */ 82 83#ifdef LAZY_PS 84#define DEF_UREAD 0; 85#define OPT_LAZY_f "f" 86#else 87#define DEF_UREAD 1; /* Always do the more-expensive read. */ 88#define OPT_LAZY_f /* I.e., the `-f' option is not added. */ 89#endif 90 91int cflag; /* -c */ 92int eval; /* Exit value */ 93time_t now; /* Current time(3) value */ 94int rawcpu; /* -C */ 95int sumrusage; /* -S */ 96int termwidth; /* Width of the screen (0 == infinity). */ 97int totwidth; /* Calculated-width of requested variables. */ 98 99struct varent *vhead; 100 101static int forceuread = DEF_UREAD; /* Do extra work to get u-area. */ 102static kvm_t *kd; 103static KINFO *kinfo; 104static int needcomm; /* -o "command" */ 105static int needenv; /* -e */ 106static int needuser; /* -o "user" */ 107static int optfatal; /* Fatal error parsing some list-option. */ 108 109static enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 110 111struct listinfo; 112typedef int addelem_rtn(struct listinfo *_inf, const char *_elem); 113 114struct listinfo { 115 int count; 116 int maxcount; 117 int elemsize; 118 addelem_rtn *addelem; 119 const char *lname; 120 union { 121 gid_t *gids; 122 pid_t *pids; 123 dev_t *ttys; 124 uid_t *uids; 125 void *ptr; 126 }; 127}; 128 129static int addelem_gid(struct listinfo *, const char *); 130static int addelem_pid(struct listinfo *, const char *); 131static int addelem_tty(struct listinfo *, const char *); 132static int addelem_uid(struct listinfo *, const char *); 133static void add_list(struct listinfo *, const char *); 134static void dynsizevars(KINFO *); 135static void *expand_list(struct listinfo *); 136static const char *fmt(char **(*)(kvm_t *, const struct kinfo_proc *, int), 137 KINFO *, char *, int); 138static void free_list(struct listinfo *); 139static void init_list(struct listinfo *, addelem_rtn, int, const char *); 140static char *kludge_oldps_options(char *); 141static int pscomp(const void *, const void *); 142static void saveuser(KINFO *); 143static void scanvars(void); 144static void sizevars(void); 145static void usage(void); 146 147static char dfmt[] = "pid,tt,state,time,command"; 148static char jfmt[] = "user,pid,ppid,pgid,jobc,state,tt,time,command"; 149static char lfmt[] = "uid,pid,ppid,cpu,pri,nice,vsz,rss,mwchan,state," 150 "tt,time,command"; 151static char o1[] = "pid"; 152static char o2[] = "tt,state,time,command"; 153static char ufmt[] = "user,pid,%cpu,%mem,vsz,rss,tt,state,start,time,command"; 154static char vfmt[] = "pid,state,time,sl,re,pagein,vsz,rss,lim,tsiz," 155 "%cpu,%mem,command"; 156static char Zfmt[] = "label"; 157 158#define PS_ARGS "AaCc" OPT_LAZY_f "G:gHhjLlM:mN:O:o:p:rSTt:U:uvwXxZ" 159 160int 161main(int argc, char *argv[]) 162{ 163 struct listinfo gidlist, pgrplist, pidlist; 164 struct listinfo ruidlist, sesslist, ttylist, uidlist; 165 struct kinfo_proc *kp; 166 struct varent *vent; 167 struct winsize ws; 168 const char *cp, *nlistf, *memf; 169 char *cols; 170 int all, ch, dropgid, elem, flag, _fmt, i, lineno; 171 int nentries, nocludge, nkept, nselectors; 172 int prtheader, showthreads, wflag, what, xkeep, xkeep_implied; 173 char errbuf[_POSIX2_LINE_MAX]; 174 175 (void) setlocale(LC_ALL, ""); 176 time(&now); /* Used by routines in print.c. */ 177 178 if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0') 179 termwidth = atoi(cols); 180 else if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 181 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 182 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 183 ws.ws_col == 0) 184 termwidth = 79; 185 else 186 termwidth = ws.ws_col - 1; 187 188 /* 189 * Don't apply a kludge if the first argument is an option taking an 190 * argument 191 */ 192 if (argc > 1) { 193 nocludge = 0; 194 if (argv[1][0] == '-') { 195 for (cp = PS_ARGS; *cp != '\0'; cp++) { 196 if (*cp != ':') 197 continue; 198 if (*(cp - 1) == argv[1][1]) { 199 nocludge = 1; 200 break; 201 } 202 } 203 } 204 if (nocludge == 0) 205 argv[1] = kludge_oldps_options(argv[1]); 206 } 207 208 all = dropgid = _fmt = nselectors = optfatal = 0; 209 prtheader = showthreads = wflag = xkeep_implied = 0; 210 xkeep = -1; /* Neither -x nor -X. */ 211 init_list(&gidlist, addelem_gid, sizeof(gid_t), "group"); 212 init_list(&pgrplist, addelem_pid, sizeof(pid_t), "process group"); 213 init_list(&pidlist, addelem_pid, sizeof(pid_t), "process id"); 214 init_list(&ruidlist, addelem_uid, sizeof(uid_t), "ruser"); 215 init_list(&sesslist, addelem_pid, sizeof(pid_t), "session id"); 216 init_list(&ttylist, addelem_tty, sizeof(dev_t), "tty"); 217 init_list(&uidlist, addelem_uid, sizeof(uid_t), "user"); 218 memf = nlistf = _PATH_DEVNULL; 219 while ((ch = getopt(argc, argv, PS_ARGS)) != -1) 220 switch((char)ch) { 221 case 'A': 222 /* 223 * Exactly the same as `-ax'. This has been 224 * added for compatability with SUSv3, but for 225 * now it will not be described in the man page. 226 */ 227 nselectors++; 228 all = xkeep = 1; 229 break; 230 case 'a': 231 nselectors++; 232 all = 1; 233 break; 234 case 'C': 235 rawcpu = 1; 236 break; 237 case 'c': 238 cflag = 1; 239 break; 240 case 'e': /* XXX set ufmt */ 241 needenv = 1; 242 break; 243#ifdef LAZY_PS 244 case 'f': 245 if (getuid() == 0 || getgid() == 0) 246 forceuread = 1; 247 break; 248#endif 249 case 'G': 250 add_list(&gidlist, optarg); 251 xkeep_implied = 1; 252 nselectors++; 253 break; 254 case 'g': 255#if 0 256 /* 257 * XXX - This SUSv3 behavior is still under debate 258 * since it conflicts with the (undocumented) 259 * `-g' option. So we skip it for now. 260 */ 261 add_list(&pgrplist, optarg); 262 xkeep_implied = 1; 263 nselectors++; 264 break; 265#else 266 /* The historical BSD-ish (from SunOS) behavior. */ 267 break; /* no-op */ 268#endif 269 case 'H': 270 showthreads = KERN_PROC_INC_THREAD; 271 break; 272 case 'h': 273 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 274 break; 275 case 'j': 276 parsefmt(jfmt, 0); 277 _fmt = 1; 278 jfmt[0] = '\0'; 279 break; 280 case 'L': 281 showkey(); 282 exit(0); 283 case 'l': 284 parsefmt(lfmt, 0); 285 _fmt = 1; 286 lfmt[0] = '\0'; 287 break; 288 case 'M': 289 memf = optarg; 290 dropgid = 1; 291 break; 292 case 'm': 293 sortby = SORTMEM; 294 break; 295 case 'N': 296 nlistf = optarg; 297 dropgid = 1; 298 break; 299 case 'O': 300 parsefmt(o1, 1); 301 parsefmt(optarg, 1); 302 parsefmt(o2, 1); 303 o1[0] = o2[0] = '\0'; 304 _fmt = 1; 305 break; 306 case 'o': 307 parsefmt(optarg, 1); 308 _fmt = 1; 309 break; 310 case 'p': 311 add_list(&pidlist, optarg); 312 /* 313 * Note: `-p' does not *set* xkeep, but any values 314 * from pidlist are checked before xkeep is. That 315 * way they are always matched, even if the user 316 * specifies `-X'. 317 */ 318 nselectors++; 319 break; 320#if 0 321 case 'R': 322 /* 323 * XXX - This un-standard option is still under 324 * debate. This is what SUSv3 defines as 325 * the `-U' option, and while it would be 326 * nice to have, it could cause even more 327 * confusion to implement it as `-R'. 328 */ 329 add_list(&ruidlist, optarg); 330 xkeep_implied = 1; 331 nselectors++; 332 break; 333#endif 334 case 'r': 335 sortby = SORTCPU; 336 break; 337 case 'S': 338 sumrusage = 1; 339 break; 340#if 0 341 case 's': 342 /* 343 * XXX - This non-standard option is still under 344 * debate. This *is* supported on Solaris, 345 * Linux, and IRIX, but conflicts with `-s' 346 * on NetBSD and maybe some older BSD's. 347 */ 348 add_list(&sesslist, optarg); 349 xkeep_implied = 1; 350 nselectors++; 351 break; 352#endif 353 case 'T': 354 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 355 errx(1, "stdin: not a terminal"); 356 /* FALLTHROUGH */ 357 case 't': 358 add_list(&ttylist, optarg); 359 xkeep_implied = 1; 360 nselectors++; 361 break; 362 case 'U': 363 /* This is what SUSv3 defines as the `-u' option. */ 364 add_list(&uidlist, optarg); 365 xkeep_implied = 1; 366 nselectors++; 367 break; 368 case 'u': 369 parsefmt(ufmt, 0); 370 sortby = SORTCPU; 371 _fmt = 1; 372 ufmt[0] = '\0'; 373 break; 374 case 'v': 375 parsefmt(vfmt, 0); 376 sortby = SORTMEM; 377 _fmt = 1; 378 vfmt[0] = '\0'; 379 break; 380 case 'w': 381 if (wflag) 382 termwidth = UNLIMITED; 383 else if (termwidth < 131) 384 termwidth = 131; 385 wflag++; 386 break; 387 case 'X': 388 /* 389 * Note that `-X' and `-x' are not standard "selector" 390 * options. For most selector-options, we check *all* 391 * processes to see if any are matched by the given 392 * value(s). After we have a set of all the matched 393 * processes, then `-X' and `-x' govern whether we 394 * modify that *matched* set for processes which do 395 * not have a controlling terminal. `-X' causes 396 * those processes to be deleted from the matched 397 * set, while `-x' causes them to be kept. 398 */ 399 xkeep = 0; 400 break; 401 case 'x': 402 xkeep = 1; 403 break; 404 case 'Z': 405 parsefmt(Zfmt, 0); 406 Zfmt[0] = '\0'; 407 break; 408 case '?': 409 default: 410 usage(); 411 } 412 argc -= optind; 413 argv += optind; 414 if (optfatal) 415 exit(1); /* Error messages already printed. */ 416 if (xkeep < 0) /* Neither -X nor -x was specified. */ 417 xkeep = xkeep_implied; 418 419#define BACKWARD_COMPATIBILITY 420#ifdef BACKWARD_COMPATIBILITY 421 if (*argv) { 422 nlistf = *argv; 423 if (*++argv) 424 memf = *argv; 425 } 426#endif 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 setuid(getuid()); 434 } 435 436 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 437 if (kd == 0) 438 errx(1, "%s", errbuf); 439 440 if (!_fmt) 441 parsefmt(dfmt, 0); 442 443 if (nselectors == 0) { 444 uidlist.ptr = malloc(sizeof(uid_t)); 445 if (uidlist.ptr == NULL) 446 errx(1, "malloc failed"); 447 nselectors = 1; 448 uidlist.count = uidlist.maxcount = 1; 449 *uidlist.uids = getuid(); 450 } 451 452 /* 453 * scan requested variables, noting what structures are needed, 454 * and adjusting header widths as appropriate. 455 */ 456 scanvars(); 457 458 /* 459 * Get process list. If the user requested just one selector- 460 * option, then kvm_getprocs can be asked to return just those 461 * processes. Otherwise, have it return all processes, and 462 * then this routine will search that full list and select the 463 * processes which match any of the user's selector-options. 464 */ 465 what = showthreads != 0 ? KERN_PROC_ALL : KERN_PROC_PROC; 466 flag = 0; 467 if (nselectors == 1) { 468 /* XXX - Apparently there's no KERN_PROC_GID flag. */ 469 if (pgrplist.count == 1) { 470 what = KERN_PROC_PGRP | showthreads; 471 flag = *pgrplist.pids; 472 nselectors = 0; 473 } else if (pidlist.count == 1) { 474 what = KERN_PROC_PID | showthreads; 475 flag = *pidlist.pids; 476 nselectors = 0; 477 } else if (ruidlist.count == 1) { 478 what = KERN_PROC_RUID | showthreads; 479 flag = *ruidlist.uids; 480 nselectors = 0; 481#if 0 482 /* 483 * XXX - KERN_PROC_SESSION causes error in kvm_getprocs? 484 * For now, always do sid-matching in this routine. 485 */ 486 } else if (sesslist.count == 1) { 487 what = KERN_PROC_SESSION | showthreads; 488 flag = *sesslist.pids; 489 nselectors = 0; 490#endif 491 } else if (ttylist.count == 1) { 492 what = KERN_PROC_TTY | showthreads; 493 flag = *ttylist.ttys; 494 nselectors = 0; 495 } else if (uidlist.count == 1) { 496 what = KERN_PROC_UID | showthreads; 497 flag = *uidlist.uids; 498 nselectors = 0; 499 } else if (all) { 500 /* No need for this routine to select processes. */ 501 nselectors = 0; 502 } 503 } 504 505 /* 506 * select procs 507 */ 508 nentries = -1; 509 kp = kvm_getprocs(kd, what, flag, &nentries); 510 if ((kp == NULL && nentries > 0) || (kp != NULL && nentries < 0)) 511 errx(1, "%s", kvm_geterr(kd)); 512 nkept = 0; 513 if (nentries > 0) { 514 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 515 errx(1, "malloc failed"); 516 for (i = nentries; --i >= 0; ++kp) { 517 /* 518 * If the user specified multiple selection-criteria, 519 * then keep any process matched by the inclusive OR 520 * of all the selection-criteria given. 521 */ 522 if (pidlist.count > 0) { 523 for (elem = 0; elem < pidlist.count; elem++) 524 if (kp->ki_pid == pidlist.pids[elem]) 525 goto keepit; 526 } 527 /* 528 * Note that we had to process pidlist before 529 * filtering out processes which do not have 530 * a controlling terminal. 531 */ 532 if (xkeep == 0) { 533 if ((kp->ki_tdev == NODEV || 534 (kp->ki_flag & P_CONTROLT) == 0)) 535 continue; 536 } 537 if (nselectors == 0) 538 goto keepit; 539 if (gidlist.count > 0) { 540 for (elem = 0; elem < gidlist.count; elem++) 541 if (kp->ki_rgid == gidlist.gids[elem]) 542 goto keepit; 543 } 544 if (pgrplist.count > 0) { 545 for (elem = 0; elem < pgrplist.count; elem++) 546 if (kp->ki_pgid == pgrplist.pids[elem]) 547 goto keepit; 548 } 549 if (ruidlist.count > 0) { 550 for (elem = 0; elem < ruidlist.count; elem++) 551 if (kp->ki_ruid == ruidlist.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.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.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.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 kinfo[nkept].ki_p = kp; 577 if (needuser) 578 saveuser(&kinfo[nkept]); 579 dynsizevars(&kinfo[nkept]); 580 nkept++; 581 } 582 } 583 584 sizevars(); 585 586 /* 587 * print header 588 */ 589 printheader(); 590 if (nkept == 0) 591 exit(1); 592 593 /* 594 * sort proc list 595 */ 596 qsort(kinfo, nkept, sizeof(KINFO), pscomp); 597 /* 598 * For each process, call each variable output function. 599 */ 600 for (i = lineno = 0; i < nkept; i++) { 601 for (vent = vhead; vent; vent = vent->next) { 602 (vent->var->oproc)(&kinfo[i], vent); 603 if (vent->next != NULL) 604 (void)putchar(' '); 605 } 606 (void)putchar('\n'); 607 if (prtheader && lineno++ == prtheader - 4) { 608 (void)putchar('\n'); 609 printheader(); 610 lineno = 0; 611 } 612 } 613 free_list(&gidlist); 614 free_list(&pidlist); 615 free_list(&pgrplist); 616 free_list(&ruidlist); 617 free_list(&sesslist); 618 free_list(&ttylist); 619 free_list(&uidlist); 620 621 exit(eval); 622} 623 624static int 625addelem_gid(struct listinfo *inf, const char *elem) 626{ 627 struct group *grp; 628 const char *nameorID; 629 char *endp; 630 intmax_t ltemp; 631 632 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 633 if (*elem == '\0') 634 warnx("Invalid (zero-length) %s name", inf->lname); 635 else 636 warnx("%s name too long: %s", inf->lname, elem); 637 optfatal = 1; 638 return (0); /* Do not add this value. */ 639 } 640 641 /* 642 * SUSv3 states that `ps -G grouplist' should match "real-group 643 * ID numbers", and does not mention group-names. I do want to 644 * also support group-names, so this tries for a group-id first, 645 * and only tries for a name if that doesn't work. This is the 646 * opposite order of what is done in addelem_uid(), but in 647 * practice the order would only matter for group-names which 648 * are all-numeric. 649 */ 650 grp = NULL; 651 nameorID = "named"; 652 errno = 0; 653 ltemp = strtol(elem, &endp, 10); 654 if (errno == 0 && *endp == '\0' && ltemp >= 0 && ltemp <= GID_MAX) { 655 nameorID = "name or ID matches"; 656 grp = getgrgid((gid_t)ltemp); 657 } 658 if (grp == NULL) 659 grp = getgrnam(elem); 660 if (grp == NULL) { 661 warnx("No %s %s '%s'", inf->lname, nameorID, elem); 662 optfatal = 1; 663 return (0); /* Do not add this value. */ 664 } 665 666 if (inf->count >= inf->maxcount) 667 expand_list(inf); 668 inf->gids[(inf->count)++] = grp->gr_gid; 669 return (1); 670} 671 672#define BSD_PID_MAX 99999 /* Copy of PID_MAX from sys/proc.h. */ 673static int 674addelem_pid(struct listinfo *inf, const char *elem) 675{ 676 char *endp; 677 long tempid; 678 679 if (*elem == '\0') 680 tempid = 0L; 681 else { 682 errno = 0; 683 tempid = strtol(elem, &endp, 10); 684 if (*endp != '\0' || tempid < 0 || elem == endp) { 685 warnx("Invalid %s: %s", inf->lname, elem); 686 errno = ERANGE; 687 } else if (errno != 0 || tempid > BSD_PID_MAX) { 688 warnx("%s too large: %s", inf->lname, elem); 689 errno = ERANGE; 690 } 691 if (errno == ERANGE) { 692 optfatal = 1; 693 return (0); /* Do not add this value. */ 694 } 695 } 696 697 if (inf->count >= inf->maxcount) 698 expand_list(inf); 699 inf->pids[(inf->count)++] = tempid; 700 return (1); 701} 702#undef BSD_PID_MAX 703 704static int 705addelem_tty(struct listinfo *inf, const char *elem) 706{ 707 const char *ttypath; 708 struct stat sb; 709 char pathbuf[PATH_MAX]; 710 711 if (strcmp(elem, "co") == 0) 712 ttypath = strdup(_PATH_CONSOLE); 713 else if (*elem == '/') 714 ttypath = elem; 715 else { 716 strlcpy(pathbuf, _PATH_TTY, sizeof(pathbuf)); 717 strlcat(pathbuf, elem, sizeof(pathbuf)); 718 ttypath = pathbuf; 719 } 720 721 if (stat(ttypath, &sb) == -1) { 722 warn("%s", ttypath); 723 optfatal = 1; 724 return (0); /* Do not add this value. */ 725 } 726 if (!S_ISCHR(sb.st_mode)) { 727 warn("%s: Not a terminal", ttypath); 728 optfatal = 1; 729 return (0); /* Do not add this value. */ 730 } 731 732 if (inf->count >= inf->maxcount) 733 expand_list(inf); 734 inf->ttys[(inf->count)++] = sb.st_rdev; 735 return (1); 736} 737 738static int 739addelem_uid(struct listinfo *inf, const char *elem) 740{ 741 struct passwd *pwd; 742 char *endp; 743 intmax_t ltemp; 744 745 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 746 if (*elem == '\0') 747 warnx("Invalid (zero-length) %s name", inf->lname); 748 else 749 warnx("%s name too long: %s", inf->lname, elem); 750 optfatal = 1; 751 return (0); /* Do not add this value. */ 752 } 753 754 pwd = getpwnam(elem); 755 if (pwd == NULL) { 756 errno = 0; 757 ltemp = strtol(elem, &endp, 10); 758 if (errno != 0 || *endp != '\0' || ltemp < 0 || 759 ltemp > 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)ltemp); 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); /* Do not add this value. */ 777 } 778 779 if (inf->count >= inf->maxcount) 780 expand_list(inf); 781 inf->uids[(inf->count)++] = pwd->pw_uid; 782 return (1); 783} 784 785static void 786add_list(struct listinfo *inf, const char *argp) 787{ 788 const char *savep; 789 char *cp, *endp; 790 int toolong; 791 char elemcopy[PATH_MAX]; 792 793 while (*argp != '\0') { 794 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 795 argp++; 796 savep = argp; 797 toolong = 0; 798 cp = elemcopy; 799 if (strchr(T_SEP, *argp) == NULL) { 800 endp = elemcopy + sizeof(elemcopy) - 1; 801 while (*argp != '\0' && cp <= endp && 802 strchr(W_SEP T_SEP, *argp) == NULL) 803 *cp++ = *argp++; 804 if (cp > endp) 805 toolong = 1; 806 } 807 if (!toolong) { 808 *cp = '\0'; 809#ifndef ADD_PS_LISTRESET 810 /* 811 * This is how the standard expects lists to 812 * be handled. 813 */ 814 inf->addelem(inf, elemcopy); 815#else 816 /* 817 * This would add a simple non-standard-but-convienent 818 * feature. 819 * 820 * XXX - The first time I tried to add this check, 821 * it increased the total size of `ps' by 3940 822 * bytes on i386! That's 12% of the entire 823 * program! The `ps.o' file grew by only about 824 * 40 bytes, but the final (stripped) executable 825 * in /bin/ps grew by 12%. I have not had time 826 * to investigate, so skip the feature for now. 827 */ 828 /* 829 * We now have a single element. Add it to the 830 * list, unless the element is ":". In that case, 831 * reset the list so previous entries are ignored. 832 */ 833 if (strcmp(elemcopy, ":") == 0) 834 inf->count = 0; 835 else 836 inf->addelem(inf, elemcopy); 837#endif 838 } else { 839 /* 840 * The string is too long to copy. Find the end 841 * of the string to print out the warning message. 842 */ 843 while (*argp != '\0' && strchr(W_SEP T_SEP, 844 *argp) == NULL) 845 argp++; 846 warnx("Value too long: %.*s", (int)(argp - savep), 847 savep); 848 optfatal = 1; 849 } 850 /* 851 * Skip over any number of trailing whitespace characters, 852 * but only one (at most) trailing element-terminating 853 * character. 854 */ 855 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 856 argp++; 857 if (*argp != '\0' && strchr(T_SEP, *argp) != NULL) { 858 argp++; 859 /* Catch case where string ended with a comma. */ 860 if (*argp == '\0') 861 inf->addelem(inf, argp); 862 } 863 } 864} 865 866static void * 867expand_list(struct listinfo *inf) 868{ 869 void *newlist; 870 int newmax; 871 872 newmax = (inf->maxcount + 1) << 1; 873 newlist = realloc(inf->ptr, newmax * inf->elemsize); 874 if (newlist == NULL) { 875 free(inf->ptr); 876 errx(1, "realloc to %d %ss failed", newmax, 877 inf->lname); 878 } 879 inf->maxcount = newmax; 880 inf->ptr = newlist; 881 882 return (newlist); 883} 884 885static void 886free_list(struct listinfo *inf) 887{ 888 889 inf->count = inf->elemsize = inf->maxcount = 0; 890 if (inf->ptr != NULL) 891 free(inf->ptr); 892 inf->addelem = NULL; 893 inf->lname = NULL; 894 inf->ptr = NULL; 895} 896 897static void 898init_list(struct listinfo *inf, addelem_rtn artn, int elemsize, 899 const char *lname) 900{ 901 902 inf->count = inf->maxcount = 0; 903 inf->elemsize = elemsize; 904 inf->addelem = artn; 905 inf->lname = lname; 906 inf->ptr = NULL; 907} 908 909VARENT * 910find_varentry(VAR *v) 911{ 912 struct varent *vent; 913 914 for (vent = vhead; vent; vent = vent->next) { 915 if (strcmp(vent->var->name, v->name) == 0) 916 return vent; 917 } 918 return NULL; 919} 920 921static void 922scanvars(void) 923{ 924 struct varent *vent; 925 VAR *v; 926 927 for (vent = vhead; vent; vent = vent->next) { 928 v = vent->var; 929 if (v->flag & DSIZ) { 930 v->dwidth = v->width; 931 v->width = 0; 932 } 933 if (v->flag & USER) 934 needuser = 1; 935 if (v->flag & COMM) 936 needcomm = 1; 937 } 938} 939 940static void 941dynsizevars(KINFO *ki) 942{ 943 struct varent *vent; 944 VAR *v; 945 int i; 946 947 for (vent = vhead; vent; vent = vent->next) { 948 v = vent->var; 949 if (!(v->flag & DSIZ)) 950 continue; 951 i = (v->sproc)( ki); 952 if (v->width < i) 953 v->width = i; 954 if (v->width > v->dwidth) 955 v->width = v->dwidth; 956 } 957} 958 959static void 960sizevars(void) 961{ 962 struct varent *vent; 963 VAR *v; 964 int i; 965 966 for (vent = vhead; vent; vent = vent->next) { 967 v = vent->var; 968 i = strlen(vent->header); 969 if (v->width < i) 970 v->width = i; 971 totwidth += v->width + 1; /* +1 for space */ 972 } 973 totwidth--; 974} 975 976static const char * 977fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki, 978 char *comm, int maxlen) 979{ 980 const char *s; 981 982 s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen); 983 return (s); 984} 985 986#define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM)) 987 988static void 989saveuser(KINFO *ki) 990{ 991 992 if (ki->ki_p->ki_sflag & PS_INMEM) { 993 /* 994 * The u-area might be swapped out, and we can't get 995 * at it because we have a crashdump and no swap. 996 * If it's here fill in these fields, otherwise, just 997 * leave them 0. 998 */ 999 ki->ki_valid = 1; 1000 } else 1001 ki->ki_valid = 0; 1002 /* 1003 * save arguments if needed 1004 */ 1005 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 1006 ki->ki_args = strdup(fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 1007 MAXCOMLEN)); 1008 } else if (needcomm) { 1009 asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm); 1010 } else { 1011 ki->ki_args = NULL; 1012 } 1013 if (needenv && UREADOK(ki)) { 1014 ki->ki_env = strdup(fmt(kvm_getenvv, ki, (char *)NULL, 0)); 1015 } else if (needenv) { 1016 ki->ki_env = malloc(3); 1017 strcpy(ki->ki_env, "()"); 1018 } else { 1019 ki->ki_env = NULL; 1020 } 1021} 1022 1023static int 1024pscomp(const void *a, const void *b) 1025{ 1026 int i; 1027#define VSIZE(k) ((k)->ki_p->ki_dsize + (k)->ki_p->ki_ssize + \ 1028 (k)->ki_p->ki_tsize) 1029 1030 if (sortby == SORTCPU) 1031 return (getpcpu((const KINFO *)b) - getpcpu((const KINFO *)a)); 1032 if (sortby == SORTMEM) 1033 return (VSIZE((const KINFO *)b) - VSIZE((const KINFO *)a)); 1034 i = (int)((const KINFO *)a)->ki_p->ki_tdev - 1035 (int)((const KINFO *)b)->ki_p->ki_tdev; 1036 if (i == 0) 1037 i = ((const KINFO *)a)->ki_p->ki_pid - 1038 ((const KINFO *)b)->ki_p->ki_pid; 1039 return (i); 1040} 1041 1042/* 1043 * ICK (all for getopt), would rather hide the ugliness 1044 * here than taint the main code. 1045 * 1046 * ps foo -> ps -foo 1047 * ps 34 -> ps -p34 1048 * 1049 * The old convention that 't' with no trailing tty arg means the users 1050 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 1051 * feature is available with the option 'T', which takes no argument. 1052 */ 1053static char * 1054kludge_oldps_options(char *s) 1055{ 1056 int have_fmt; 1057 size_t len; 1058 char *newopts, *ns, *cp; 1059 1060 /* 1061 * If we have an 'o' option, then note it, since we don't want to do 1062 * some types of munging. 1063 */ 1064 have_fmt = index(s, 'o') != NULL; 1065 1066 len = strlen(s); 1067 if ((newopts = ns = malloc(len + 2)) == NULL) 1068 errx(1, "malloc failed"); 1069 /* 1070 * options begin with '-' 1071 */ 1072 if (*s != '-') 1073 *ns++ = '-'; /* add option flag */ 1074 /* 1075 * gaze to end of argv[1] 1076 */ 1077 cp = s + len - 1; 1078 /* 1079 * if last letter is a 't' flag with no argument (in the context 1080 * of the oldps options -- option string NOT starting with a '-' -- 1081 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 1082 * 1083 * However, if a flag accepting a string argument is found in the 1084 * option string, the remainder of the string is the argument to 1085 * that flag; do not modify that argument. 1086 */ 1087 if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-') 1088 *cp = 'T'; 1089 else { 1090 /* 1091 * otherwise check for trailing number, which *may* be a 1092 * pid. 1093 */ 1094 while (cp >= s && isdigit(*cp)) 1095 --cp; 1096 } 1097 cp++; 1098 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 1099 ns += cp - s; 1100 /* 1101 * if there's a trailing number, and not a preceding 'p' (pid) or 1102 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 1103 */ 1104 if (isdigit(*cp) && 1105 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 1106 (cp - 1 == s || cp[-2] != 't') && !have_fmt) 1107 *ns++ = 'p'; 1108 (void)strcpy(ns, cp); /* and append the number */ 1109 1110 return (newopts); 1111} 1112 1113static void 1114usage(void) 1115{ 1116#define SINGLE_OPTS "[-aC" OPT_LAZY_f "HhjlmrSTuvwXxZ]" 1117 1118 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 1119 "usage: ps " SINGLE_OPTS " [-G gid[,gid]] [-O|o fmt]", 1120 " [-p pid[,pid]] [-t tty[,tty]] [-U user[,user]]", 1121 " [-M core] [-N system]", 1122 " ps [-L]"); 1123 exit(1); 1124} 1125