ps.c revision 127539
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 127539 2004-03-29 00:25:09Z 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 /* Set the time to what it is right now. */ 177 time(&now); 178 179 if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0') 180 termwidth = atoi(cols); 181 else if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 182 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 183 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 184 ws.ws_col == 0) 185 termwidth = 79; 186 else 187 termwidth = ws.ws_col - 1; 188 189 /* 190 * Don't apply a kludge if the first argument is an option taking an 191 * argument 192 */ 193 if (argc > 1) { 194 nocludge = 0; 195 if (argv[1][0] == '-') { 196 for (cp = PS_ARGS; *cp != '\0'; cp++) { 197 if (*cp != ':') 198 continue; 199 if (*(cp - 1) == argv[1][1]) { 200 nocludge = 1; 201 break; 202 } 203 } 204 } 205 if (nocludge == 0) 206 argv[1] = kludge_oldps_options(argv[1]); 207 } 208 209 xkeep = -1; /* Neither -x nor -X */ 210 all = _fmt = nselectors = prtheader = wflag = xkeep_implied = 0; 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 dropgid = 0; 219 optfatal = 0; 220 memf = nlistf = _PATH_DEVNULL; 221 showthreads = 0; 222 while ((ch = getopt(argc, argv, PS_ARGS)) != -1) 223 switch((char)ch) { 224 case 'A': 225 /* 226 * Exactly the same as `-ax'. This has been 227 * added for compatability with SUSv3, but for 228 * now it will not be described in the man page. 229 */ 230 nselectors++; 231 all = xkeep = 1; 232 break; 233 case 'a': 234 nselectors++; 235 all = 1; 236 break; 237 case 'C': 238 rawcpu = 1; 239 break; 240 case 'c': 241 cflag = 1; 242 break; 243 case 'e': /* XXX set ufmt */ 244 needenv = 1; 245 break; 246#ifdef LAZY_PS 247 case 'f': 248 if (getuid() == 0 || getgid() == 0) 249 forceuread = 1; 250 break; 251#endif 252 case 'G': 253 add_list(&gidlist, optarg); 254 xkeep_implied = 1; 255 nselectors++; 256 break; 257#if 0 258 /* XXX - This SUSv3 option is still under debate. */ 259 /* (it conflicts with the undocumented `-g' option) */ 260 case 'g': 261 add_list(&pgrplist, optarg); 262 xkeep_implied = 1; 263 nselectors++; 264 break; 265#else 266 case 'g': 267 /* Historical BSD-ish (from SunOS) option */ 268 break; /* no-op */ 269#endif 270 case 'H': 271 showthreads = KERN_PROC_INC_THREAD; 272 break; 273 case 'h': 274 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 275 break; 276 case 'j': 277 parsefmt(jfmt, 0); 278 _fmt = 1; 279 jfmt[0] = '\0'; 280 break; 281 case 'L': 282 showkey(); 283 exit(0); 284 case 'l': 285 parsefmt(lfmt, 0); 286 _fmt = 1; 287 lfmt[0] = '\0'; 288 break; 289 case 'M': 290 memf = optarg; 291 dropgid = 1; 292 break; 293 case 'm': 294 sortby = SORTMEM; 295 break; 296 case 'N': 297 nlistf = optarg; 298 dropgid = 1; 299 break; 300 case 'O': 301 parsefmt(o1, 1); 302 parsefmt(optarg, 1); 303 parsefmt(o2, 1); 304 o1[0] = o2[0] = '\0'; 305 _fmt = 1; 306 break; 307 case 'o': 308 parsefmt(optarg, 1); 309 _fmt = 1; 310 break; 311 case 'p': 312 add_list(&pidlist, optarg); 313 /* 314 * Note: `-p' does not *set* xkeep, but any values 315 * from pidlist are checked before xkeep is. That 316 * way they are always matched, even if the user 317 * specifies `-X'. 318 */ 319 nselectors++; 320 break; 321#if 0 322 /* XXX - This un-standard option is still under debate. */ 323 case 'R': 324 /* This is what SUSv3 defines as the `-U' option. */ 325 add_list(&ruidlist, optarg); 326 xkeep_implied = 1; 327 nselectors++; 328 break; 329#endif 330 case 'r': 331 sortby = SORTCPU; 332 break; 333 case 'S': 334 sumrusage = 1; 335 break; 336#if 0 337 /* XXX - This non-standard option is still under debate. */ 338 /* (it conflicts with `-s' in NetBSD) */ 339 case 's': 340 /* As seen on Solaris, Linux, IRIX. */ 341 add_list(&sesslist, optarg); 342 xkeep_implied = 1; 343 nselectors++; 344 break; 345#endif 346 case 'T': 347 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 348 errx(1, "stdin: not a terminal"); 349 /* FALLTHROUGH */ 350 case 't': 351 add_list(&ttylist, optarg); 352 xkeep_implied = 1; 353 nselectors++; 354 break; 355 case 'U': 356 /* This is what SUSv3 defines as the `-u' option. */ 357 add_list(&uidlist, optarg); 358 xkeep_implied = 1; 359 nselectors++; 360 break; 361 case 'u': 362 parsefmt(ufmt, 0); 363 sortby = SORTCPU; 364 _fmt = 1; 365 ufmt[0] = '\0'; 366 break; 367 case 'v': 368 parsefmt(vfmt, 0); 369 sortby = SORTMEM; 370 _fmt = 1; 371 vfmt[0] = '\0'; 372 break; 373 case 'w': 374 if (wflag) 375 termwidth = UNLIMITED; 376 else if (termwidth < 131) 377 termwidth = 131; 378 wflag++; 379 break; 380 case 'X': 381 /* 382 * Note that `-X' and `-x' are not standard "selector" 383 * options. For most selector-options, we check *all* 384 * processes to see if any are matched by the given 385 * value(s). After we have a set of all the matched 386 * processes, then `-X' and `-x' govern whether we 387 * modify that *matched* set for processes which do 388 * not have a controlling terminal. `-X' causes 389 * those processes to be deleted from the matched 390 * set, while `-x' causes them to be kept. 391 */ 392 xkeep = 0; 393 break; 394 case 'x': 395 xkeep = 1; 396 break; 397 case 'Z': 398 parsefmt(Zfmt, 0); 399 Zfmt[0] = '\0'; 400 break; 401 case '?': 402 default: 403 usage(); 404 } 405 argc -= optind; 406 argv += optind; 407 408 if (optfatal) 409 exit(1); /* Error messages already printed */ 410 411 if (xkeep < 0) /* Neither -X nor -x was specified */ 412 xkeep = xkeep_implied; 413 414#define BACKWARD_COMPATIBILITY 415#ifdef BACKWARD_COMPATIBILITY 416 if (*argv) { 417 nlistf = *argv; 418 if (*++argv) { 419 memf = *argv; 420 } 421 } 422#endif 423 /* 424 * Discard setgid privileges if not the running kernel so that bad 425 * guys can't print interesting stuff from kernel memory. 426 */ 427 if (dropgid) { 428 setgid(getgid()); 429 setuid(getuid()); 430 } 431 432 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 433 if (kd == 0) 434 errx(1, "%s", errbuf); 435 436 if (!_fmt) 437 parsefmt(dfmt, 0); 438 439 if (nselectors == 0) { 440 uidlist.ptr = malloc(sizeof(uid_t)); 441 if (uidlist.ptr == NULL) 442 errx(1, "malloc failed"); 443 nselectors = 1; 444 uidlist.count = uidlist.maxcount = 1; 445 *uidlist.uids = getuid(); 446 } 447 448 /* 449 * scan requested variables, noting what structures are needed, 450 * and adjusting header widths as appropriate. 451 */ 452 scanvars(); 453 454 /* 455 * Get process list. If the user requested just one selector- 456 * option, then kvm_getprocs can be asked to return just those 457 * processes. Otherwise, have it return all processes, and 458 * then this routine will search that full list and select the 459 * processes which match any of the user's selector-options. 460 */ 461 what = showthreads != 0 ? KERN_PROC_ALL : KERN_PROC_PROC; 462 flag = 0; 463 if (nselectors == 1) { 464 /* XXX - Apparently there's no KERN_PROC_GID flag. */ 465 if (pgrplist.count == 1) { 466 what = KERN_PROC_PGRP | showthreads; 467 flag = *pgrplist.pids; 468 nselectors = 0; 469 } else if (pidlist.count == 1) { 470 what = KERN_PROC_PID | showthreads; 471 flag = *pidlist.pids; 472 nselectors = 0; 473 } else if (ruidlist.count == 1) { 474 what = KERN_PROC_RUID | showthreads; 475 flag = *ruidlist.uids; 476 nselectors = 0; 477#if 0 /* XXX - KERN_PROC_SESSION causes error in kvm_getprocs? */ 478 } else if (sesslist.count == 1) { 479 what = KERN_PROC_SESSION | showthreads; 480 flag = *sesslist.pids; 481 nselectors = 0; 482#endif 483 } else if (ttylist.count == 1) { 484 what = KERN_PROC_TTY | showthreads; 485 flag = *ttylist.ttys; 486 nselectors = 0; 487 } else if (uidlist.count == 1) { 488 what = KERN_PROC_UID | showthreads; 489 flag = *uidlist.uids; 490 nselectors = 0; 491 } else if (all) { 492 /* No need for this routine to select processes. */ 493 nselectors = 0; 494 } 495 } 496 497 /* 498 * select procs 499 */ 500 nentries = -1; 501 kp = kvm_getprocs(kd, what, flag, &nentries); 502 if ((kp == 0 && nentries > 0) || (kp != 0 && nentries < 0)) 503 errx(1, "%s", kvm_geterr(kd)); 504 nkept = 0; 505 if (nentries > 0) { 506 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 507 errx(1, "malloc failed"); 508 for (i = nentries; --i >= 0; ++kp) { 509 /* 510 * If the user specified multiple selection-criteria, 511 * then keep any process matched by the inclusive OR 512 * of all the selection-criteria given. 513 */ 514 if (pidlist.count > 0) { 515 for (elem = 0; elem < pidlist.count; elem++) 516 if (kp->ki_pid == pidlist.pids[elem]) 517 goto keepit; 518 } 519 /* 520 * Note that we had to process pidlist before 521 * filtering out processes which do not have 522 * a controlling terminal. 523 */ 524 if (xkeep == 0) { 525 if ((kp->ki_tdev == NODEV || 526 (kp->ki_flag & P_CONTROLT) == 0)) 527 continue; 528 } 529 if (nselectors == 0) 530 goto keepit; 531 if (gidlist.count > 0) { 532 for (elem = 0; elem < gidlist.count; elem++) 533 if (kp->ki_rgid == gidlist.gids[elem]) 534 goto keepit; 535 } 536 if (pgrplist.count > 0) { 537 for (elem = 0; elem < pgrplist.count; elem++) 538 if (kp->ki_pgid == pgrplist.pids[elem]) 539 goto keepit; 540 } 541 if (ruidlist.count > 0) { 542 for (elem = 0; elem < ruidlist.count; elem++) 543 if (kp->ki_ruid == ruidlist.uids[elem]) 544 goto keepit; 545 } 546 if (sesslist.count > 0) { 547 for (elem = 0; elem < sesslist.count; elem++) 548 if (kp->ki_sid == sesslist.pids[elem]) 549 goto keepit; 550 } 551 if (ttylist.count > 0) { 552 for (elem = 0; elem < ttylist.count; elem++) 553 if (kp->ki_tdev == ttylist.ttys[elem]) 554 goto keepit; 555 } 556 if (uidlist.count > 0) { 557 for (elem = 0; elem < uidlist.count; elem++) 558 if (kp->ki_uid == uidlist.uids[elem]) 559 goto keepit; 560 } 561 /* 562 * This process did not match any of the user's 563 * selector-options, so skip the process. 564 */ 565 continue; 566 567 keepit: 568 kinfo[nkept].ki_p = kp; 569 if (needuser) 570 saveuser(&kinfo[nkept]); 571 dynsizevars(&kinfo[nkept]); 572 nkept++; 573 } 574 } 575 576 sizevars(); 577 578 /* 579 * print header 580 */ 581 printheader(); 582 if (nkept == 0) 583 exit(1); 584 585 /* 586 * sort proc list 587 */ 588 qsort(kinfo, nkept, sizeof(KINFO), pscomp); 589 /* 590 * For each process, call each variable output function. 591 */ 592 for (i = lineno = 0; i < nkept; i++) { 593 for (vent = vhead; vent; vent = vent->next) { 594 (vent->var->oproc)(&kinfo[i], vent); 595 if (vent->next != NULL) 596 (void)putchar(' '); 597 } 598 (void)putchar('\n'); 599 if (prtheader && lineno++ == prtheader - 4) { 600 (void)putchar('\n'); 601 printheader(); 602 lineno = 0; 603 } 604 } 605 free_list(&gidlist); 606 free_list(&pidlist); 607 free_list(&pgrplist); 608 free_list(&ruidlist); 609 free_list(&sesslist); 610 free_list(&ttylist); 611 free_list(&uidlist); 612 613 exit(eval); 614} 615 616static int 617addelem_gid(struct listinfo *inf, const char *elem) 618{ 619 struct group *grp; 620 const char *nameorID; 621 char *endp; 622 intmax_t ltemp; 623 624 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 625 if (*elem == '\0') 626 warnx("Invalid (zero-length) %s name", inf->lname); 627 else 628 warnx("%s name too long: %s", inf->lname, elem); 629 optfatal = 1; 630 return (0); /* Do not add this value */ 631 } 632 633 /* 634 * SUSv3 states that `ps -G grouplist' should match "real-group 635 * ID numbers", and does not mention group-names. I do want to 636 * also support group-names, so this tries for a group-id first, 637 * and only tries for a name if that doesn't work. This is the 638 * opposite order of what is done in addelem_uid(), but in 639 * practice the order would only matter for group-names which 640 * are all-numeric. 641 */ 642 grp = NULL; 643 nameorID = "named"; 644 errno = 0; 645 ltemp = strtol(elem, &endp, 10); 646 if (errno == 0 && *endp == '\0' && ltemp >= 0 && ltemp <= GID_MAX) { 647 nameorID = "name or ID matches"; 648 grp = getgrgid((gid_t)ltemp); 649 } 650 if (grp == NULL) 651 grp = getgrnam(elem); 652 if (grp == NULL) { 653 warnx("No %s %s '%s'", inf->lname, nameorID, elem); 654 optfatal = 1; 655 return (0); /* Do not add this value */ 656 } 657 658 if (inf->count >= inf->maxcount) 659 expand_list(inf); 660 inf->gids[(inf->count)++] = grp->gr_gid; 661 return (1); 662} 663 664#define BSD_PID_MAX 99999 /* Copy of PID_MAX from sys/proc.h */ 665static int 666addelem_pid(struct listinfo *inf, const char *elem) 667{ 668 char *endp; 669 long tempid; 670 671 if (*elem == '\0') 672 tempid = 0L; 673 else { 674 errno = 0; 675 tempid = strtol(elem, &endp, 10); 676 if (*endp != '\0' || tempid < 0 || elem == endp) { 677 warnx("Invalid %s: %s", inf->lname, elem); 678 errno = ERANGE; 679 } else if (errno != 0 || tempid > BSD_PID_MAX) { 680 warnx("%s too large: %s", inf->lname, elem); 681 errno = ERANGE; 682 } 683 if (errno == ERANGE) { 684 optfatal = 1; 685 return (0); /* Do not add this value */ 686 } 687 } 688 689 if (inf->count >= inf->maxcount) 690 expand_list(inf); 691 inf->pids[(inf->count)++] = tempid; 692 return (1); 693} 694#undef BSD_PID_MAX 695 696static int 697addelem_tty(struct listinfo *inf, const char *elem) 698{ 699 const char *ttypath; 700 struct stat sb; 701 char pathbuf[PATH_MAX]; 702 703 if (strcmp(elem, "co") == 0) 704 ttypath = strdup(_PATH_CONSOLE); 705 else if (*elem == '/') 706 ttypath = elem; 707 else { 708 strlcpy(pathbuf, _PATH_TTY, sizeof(pathbuf)); 709 strlcat(pathbuf, elem, sizeof(pathbuf)); 710 ttypath = pathbuf; 711 } 712 713 if (stat(ttypath, &sb) == -1) { 714 warn("%s", ttypath); 715 optfatal = 1; 716 return (0); /* Do not add this value */ 717 } 718 if (!S_ISCHR(sb.st_mode)) { 719 warn("%s: Not a terminal", ttypath); 720 optfatal = 1; 721 return (0); /* Do not add this value */ 722 } 723 724 if (inf->count >= inf->maxcount) 725 expand_list(inf); 726 inf->ttys[(inf->count)++] = sb.st_rdev; 727 return (1); 728} 729 730static int 731addelem_uid(struct listinfo *inf, const char *elem) 732{ 733 struct passwd *pwd; 734 char *endp; 735 intmax_t ltemp; 736 737 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 738 if (*elem == '\0') 739 warnx("Invalid (zero-length) %s name", inf->lname); 740 else 741 warnx("%s name too long: %s", inf->lname, elem); 742 optfatal = 1; 743 return (0); /* Do not add this value */ 744 } 745 746 pwd = getpwnam(elem); 747 if (pwd == NULL) { 748 errno = 0; 749 ltemp = strtol(elem, &endp, 10); 750 if (errno != 0 || *endp != '\0' || ltemp < 0 || 751 ltemp > UID_MAX) 752 warnx("No %s named '%s'", inf->lname, elem); 753 else { 754 /* The string is all digits, so it might be a userID. */ 755 pwd = getpwuid((uid_t)ltemp); 756 if (pwd == NULL) 757 warnx("No %s name or ID matches '%s'", 758 inf->lname, elem); 759 } 760 } 761 if (pwd == NULL) { 762 /* 763 * These used to be treated as minor warnings (and the 764 * option was simply ignored), but now they are fatal 765 * errors (and the command will be aborted). 766 */ 767 optfatal = 1; 768 return (0); /* Do not add this value */ 769 } 770 771 if (inf->count >= inf->maxcount) 772 expand_list(inf); 773 inf->uids[(inf->count)++] = pwd->pw_uid; 774 return (1); 775} 776 777static void 778add_list(struct listinfo *inf, const char *argp) 779{ 780 const char *savep; 781 char *cp, *endp; 782 int toolong; 783 char elemcopy[PATH_MAX]; 784 785 while (*argp != '\0') { 786 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 787 argp++; 788 savep = argp; 789 toolong = 0; 790 cp = elemcopy; 791 if (strchr(T_SEP, *argp) == NULL) { 792 endp = elemcopy + sizeof(elemcopy) - 1; 793 while (*argp != '\0' && cp <= endp && 794 strchr(W_SEP T_SEP, *argp) == NULL) 795 *cp++ = *argp++; 796 if (cp > endp) 797 toolong = 1; 798 } 799 if (!toolong) { 800 *cp = '\0'; 801#ifndef ADD_PS_LISTRESET 802 /* This is how the standard expects lists to be handled. */ 803 inf->addelem(inf, elemcopy); 804#else 805 /* 806 * This would add a simple non-standard-but-convienent feature. 807 * 808 * XXX - Adding this check increased the total size of `ps' by 809 * 3940 bytes on i386! That's 12% of the entire program! 810 * The `ps.o' file grew by only about 40 bytes, but the 811 * final (stripped) executable in /bin/ps grew by 12%. 812 */ 813 /* 814 * We now have a single element. Add it to the 815 * list, unless the element is ":". In that case, 816 * reset the list so previous entries are ignored. 817 */ 818 if (strcmp(elemcopy, ":") == 0) 819 inf->count = 0; 820 else 821 inf->addelem(inf, elemcopy); 822#endif 823 } else { 824 /* 825 * The string is too long to copy. Find the end 826 * of the string to print out the warning message. 827 */ 828 while (*argp != '\0' && strchr(W_SEP T_SEP, 829 *argp) == NULL) 830 argp++; 831 warnx("Value too long: %.*s", (int)(argp - savep), 832 savep); 833 optfatal = 1; 834 } 835 /* 836 * Skip over any number of trailing whitespace characters, 837 * but only one (at most) trailing element-terminating 838 * character. 839 */ 840 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 841 argp++; 842 if (*argp != '\0' && strchr(T_SEP, *argp) != NULL) { 843 argp++; 844 /* Catch case where string ended with a comma. */ 845 if (*argp == '\0') 846 inf->addelem(inf, argp); 847 } 848 } 849} 850 851static void * 852expand_list(struct listinfo *inf) 853{ 854 void *newlist; 855 int newmax; 856 857 newmax = (inf->maxcount + 1) << 1; 858 newlist = realloc(inf->ptr, newmax * inf->elemsize); 859 if (newlist == NULL) { 860 free(inf->ptr); 861 errx(1, "realloc to %d %ss failed", newmax, 862 inf->lname); 863 } 864 inf->maxcount = newmax; 865 inf->ptr = newlist; 866 867 return (newlist); 868} 869 870static void 871free_list(struct listinfo *inf) 872{ 873 874 inf->count = inf->elemsize = inf->maxcount = 0; 875 if (inf->ptr != NULL) 876 free(inf->ptr); 877 inf->addelem = NULL; 878 inf->lname = NULL; 879 inf->ptr = NULL; 880} 881 882static void 883init_list(struct listinfo *inf, addelem_rtn artn, int elemsize, 884 const char *lname) 885{ 886 887 inf->count = inf->maxcount = 0; 888 inf->elemsize = elemsize; 889 inf->addelem = artn; 890 inf->lname = lname; 891 inf->ptr = NULL; 892} 893 894VARENT * 895find_varentry(VAR *v) 896{ 897 struct varent *vent; 898 899 for (vent = vhead; vent; vent = vent->next) { 900 if (strcmp(vent->var->name, v->name) == 0) 901 return vent; 902 } 903 return NULL; 904} 905 906static void 907scanvars(void) 908{ 909 struct varent *vent; 910 VAR *v; 911 912 for (vent = vhead; vent; vent = vent->next) { 913 v = vent->var; 914 if (v->flag & DSIZ) { 915 v->dwidth = v->width; 916 v->width = 0; 917 } 918 if (v->flag & USER) 919 needuser = 1; 920 if (v->flag & COMM) 921 needcomm = 1; 922 } 923} 924 925static void 926dynsizevars(KINFO *ki) 927{ 928 struct varent *vent; 929 VAR *v; 930 int i; 931 932 for (vent = vhead; vent; vent = vent->next) { 933 v = vent->var; 934 if (!(v->flag & DSIZ)) 935 continue; 936 i = (v->sproc)( ki); 937 if (v->width < i) 938 v->width = i; 939 if (v->width > v->dwidth) 940 v->width = v->dwidth; 941 } 942} 943 944static void 945sizevars(void) 946{ 947 struct varent *vent; 948 VAR *v; 949 int i; 950 951 for (vent = vhead; vent; vent = vent->next) { 952 v = vent->var; 953 i = strlen(vent->header); 954 if (v->width < i) 955 v->width = i; 956 totwidth += v->width + 1; /* +1 for space */ 957 } 958 totwidth--; 959} 960 961static const char * 962fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki, 963 char *comm, int maxlen) 964{ 965 const char *s; 966 967 s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen); 968 return (s); 969} 970 971#define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM)) 972 973static void 974saveuser(KINFO *ki) 975{ 976 977 if (ki->ki_p->ki_sflag & PS_INMEM) { 978 /* 979 * The u-area might be swapped out, and we can't get 980 * at it because we have a crashdump and no swap. 981 * If it's here fill in these fields, otherwise, just 982 * leave them 0. 983 */ 984 ki->ki_valid = 1; 985 } else 986 ki->ki_valid = 0; 987 /* 988 * save arguments if needed 989 */ 990 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 991 ki->ki_args = strdup(fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 992 MAXCOMLEN)); 993 } else if (needcomm) { 994 asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm); 995 } else { 996 ki->ki_args = NULL; 997 } 998 if (needenv && UREADOK(ki)) { 999 ki->ki_env = strdup(fmt(kvm_getenvv, ki, (char *)NULL, 0)); 1000 } else if (needenv) { 1001 ki->ki_env = malloc(3); 1002 strcpy(ki->ki_env, "()"); 1003 } else { 1004 ki->ki_env = NULL; 1005 } 1006} 1007 1008static int 1009pscomp(const void *a, const void *b) 1010{ 1011 int i; 1012#define VSIZE(k) ((k)->ki_p->ki_dsize + (k)->ki_p->ki_ssize + \ 1013 (k)->ki_p->ki_tsize) 1014 1015 if (sortby == SORTCPU) 1016 return (getpcpu((const KINFO *)b) - getpcpu((const KINFO *)a)); 1017 if (sortby == SORTMEM) 1018 return (VSIZE((const KINFO *)b) - VSIZE((const KINFO *)a)); 1019 i = (int)((const KINFO *)a)->ki_p->ki_tdev - 1020 (int)((const KINFO *)b)->ki_p->ki_tdev; 1021 if (i == 0) 1022 i = ((const KINFO *)a)->ki_p->ki_pid - 1023 ((const KINFO *)b)->ki_p->ki_pid; 1024 return (i); 1025} 1026 1027/* 1028 * ICK (all for getopt), would rather hide the ugliness 1029 * here than taint the main code. 1030 * 1031 * ps foo -> ps -foo 1032 * ps 34 -> ps -p34 1033 * 1034 * The old convention that 't' with no trailing tty arg means the users 1035 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 1036 * feature is available with the option 'T', which takes no argument. 1037 */ 1038static char * 1039kludge_oldps_options(char *s) 1040{ 1041 int have_fmt; 1042 size_t len; 1043 char *newopts, *ns, *cp; 1044 1045 /* 1046 * If we have an 'o' option, then note it, since we don't want to do 1047 * some types of munging. 1048 */ 1049 have_fmt = index(s, 'o') != NULL; 1050 1051 len = strlen(s); 1052 if ((newopts = ns = malloc(len + 2)) == NULL) 1053 errx(1, "malloc failed"); 1054 /* 1055 * options begin with '-' 1056 */ 1057 if (*s != '-') 1058 *ns++ = '-'; /* add option flag */ 1059 /* 1060 * gaze to end of argv[1] 1061 */ 1062 cp = s + len - 1; 1063 /* 1064 * if last letter is a 't' flag with no argument (in the context 1065 * of the oldps options -- option string NOT starting with a '-' -- 1066 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 1067 * 1068 * However, if a flag accepting a string argument is found in the 1069 * option string, the remainder of the string is the argument to 1070 * that flag; do not modify that argument. 1071 */ 1072 if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-') 1073 *cp = 'T'; 1074 else { 1075 /* 1076 * otherwise check for trailing number, which *may* be a 1077 * pid. 1078 */ 1079 while (cp >= s && isdigit(*cp)) 1080 --cp; 1081 } 1082 cp++; 1083 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 1084 ns += cp - s; 1085 /* 1086 * if there's a trailing number, and not a preceding 'p' (pid) or 1087 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 1088 */ 1089 if (isdigit(*cp) && 1090 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 1091 (cp - 1 == s || cp[-2] != 't') && !have_fmt) 1092 *ns++ = 'p'; 1093 (void)strcpy(ns, cp); /* and append the number */ 1094 1095 return (newopts); 1096} 1097 1098static void 1099usage(void) 1100{ 1101#define SINGLE_OPTS "[-aC" OPT_LAZY_f "HhjlmrSTuvwXxZ]" 1102 1103 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 1104 "usage: ps " SINGLE_OPTS " [-G gid[,gid]] [-O|o fmt]", 1105 " [-p pid[,pid]] [-t tty[,tty]] [-U user[,user]]", 1106 " [-M core] [-N system]", 1107 " ps [-L]"); 1108 exit(1); 1109} 1110