ps.c revision 127537
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 127537 2004-03-29 00:12:03Z 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,tt,time,command"; 150static char o1[] = "pid"; 151static char o2[] = "tt,state,time,command"; 152static char ufmt[] = "user,pid,%cpu,%mem,vsz,rss,tt,state,start,time,command"; 153static char vfmt[] = "pid,state,time,sl,re,pagein,vsz,rss,lim,tsiz,%cpu,%mem,command"; 154static char Zfmt[] = "label"; 155 156#define PS_ARGS "AaCc" OPT_LAZY_f "G:gHhjLlM:mN:O:o:p:rSTt:U:uvwXxZ" 157 158int 159main(int argc, char *argv[]) 160{ 161 struct listinfo gidlist, pgrplist, pidlist; 162 struct listinfo ruidlist, sesslist, ttylist, uidlist; 163 struct kinfo_proc *kp; 164 struct varent *vent; 165 struct winsize ws; 166 int all, ch, dropgid, elem, flag, _fmt, i, lineno; 167 int nentries, nocludge, nkept, nselectors; 168 int prtheader, showthreads, wflag, what, xkeep, xkeep_implied; 169 char *cols; 170 char errbuf[_POSIX2_LINE_MAX]; 171 const char *cp, *nlistf, *memf; 172 173 (void) setlocale(LC_ALL, ""); 174 /* Set the time to what it is right now. */ 175 time(&now); 176 177 if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0') 178 termwidth = atoi(cols); 179 else if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 180 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 181 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 182 ws.ws_col == 0) 183 termwidth = 79; 184 else 185 termwidth = ws.ws_col - 1; 186 187 /* 188 * Don't apply a kludge if the first argument is an option taking an 189 * argument 190 */ 191 if (argc > 1) { 192 nocludge = 0; 193 if (argv[1][0] == '-') { 194 for (cp = PS_ARGS; *cp != '\0'; cp++) { 195 if (*cp != ':') 196 continue; 197 if (*(cp - 1) == argv[1][1]) { 198 nocludge = 1; 199 break; 200 } 201 } 202 } 203 if (nocludge == 0) 204 argv[1] = kludge_oldps_options(argv[1]); 205 } 206 207 xkeep = -1; /* Neither -x nor -X */ 208 all = _fmt = nselectors = prtheader = wflag = xkeep_implied = 0; 209 init_list(&gidlist, addelem_gid, sizeof(gid_t), "group"); 210 init_list(&pgrplist, addelem_pid, sizeof(pid_t), "process group"); 211 init_list(&pidlist, addelem_pid, sizeof(pid_t), "process id"); 212 init_list(&ruidlist, addelem_uid, sizeof(uid_t), "ruser"); 213 init_list(&sesslist, addelem_pid, sizeof(pid_t), "session id"); 214 init_list(&ttylist, addelem_tty, sizeof(dev_t), "tty"); 215 init_list(&uidlist, addelem_uid, sizeof(uid_t), "user"); 216 dropgid = 0; 217 optfatal = 0; 218 memf = nlistf = _PATH_DEVNULL; 219 showthreads = 0; 220 while ((ch = getopt(argc, argv, PS_ARGS)) != -1) 221 switch((char)ch) { 222 case 'A': 223 /* 224 * Exactly the same as `-ax'. This has been 225 * added for compatability with SUSv3, but for 226 * now it will not be described in the man page. 227 */ 228 nselectors++; 229 all = xkeep = 1; 230 break; 231 case 'a': 232 nselectors++; 233 all = 1; 234 break; 235 case 'C': 236 rawcpu = 1; 237 break; 238 case 'c': 239 cflag = 1; 240 break; 241 case 'e': /* XXX set ufmt */ 242 needenv = 1; 243 break; 244#ifdef LAZY_PS 245 case 'f': 246 if (getuid() == 0 || getgid() == 0) 247 forceuread = 1; 248 break; 249#endif 250 case 'G': 251 add_list(&gidlist, optarg); 252 xkeep_implied = 1; 253 nselectors++; 254 break; 255#if 0 256 /* XXX - This SUSv3 option is still under debate. */ 257 /* (it conflicts with the undocumented `-g' option) */ 258 case 'g': 259 add_list(&pgrplist, optarg); 260 xkeep_implied = 1; 261 nselectors++; 262 break; 263#else 264 case 'g': 265 /* Historical BSD-ish (from SunOS) option */ 266 break; /* no-op */ 267#endif 268 case 'H': 269 showthreads = KERN_PROC_INC_THREAD; 270 break; 271 case 'h': 272 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 273 break; 274 case 'j': 275 parsefmt(jfmt, 0); 276 _fmt = 1; 277 jfmt[0] = '\0'; 278 break; 279 case 'L': 280 showkey(); 281 exit(0); 282 case 'l': 283 parsefmt(lfmt, 0); 284 _fmt = 1; 285 lfmt[0] = '\0'; 286 break; 287 case 'M': 288 memf = optarg; 289 dropgid = 1; 290 break; 291 case 'm': 292 sortby = SORTMEM; 293 break; 294 case 'N': 295 nlistf = optarg; 296 dropgid = 1; 297 break; 298 case 'O': 299 parsefmt(o1, 1); 300 parsefmt(optarg, 1); 301 parsefmt(o2, 1); 302 o1[0] = o2[0] = '\0'; 303 _fmt = 1; 304 break; 305 case 'o': 306 parsefmt(optarg, 1); 307 _fmt = 1; 308 break; 309 case 'p': 310 add_list(&pidlist, optarg); 311 /* 312 * Note: `-p' does not *set* xkeep, but any values 313 * from pidlist are checked before xkeep is. That 314 * way they are always matched, even if the user 315 * specifies `-X'. 316 */ 317 nselectors++; 318 break; 319#if 0 320 /* XXX - This un-standard option is still under debate. */ 321 case 'R': 322 /* This is what SUSv3 defines as the `-U' option. */ 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 /* XXX - This non-standard option is still under debate. */ 336 /* (it conflicts with `-s' in NetBSD) */ 337 case 's': 338 /* As seen on Solaris, Linux, IRIX. */ 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 if (optfatal) 407 exit(1); /* Error messages already printed */ 408 409 if (xkeep < 0) /* Neither -X nor -x was specified */ 410 xkeep = xkeep_implied; 411 412#define BACKWARD_COMPATIBILITY 413#ifdef BACKWARD_COMPATIBILITY 414 if (*argv) { 415 nlistf = *argv; 416 if (*++argv) { 417 memf = *argv; 418 } 419 } 420#endif 421 /* 422 * Discard setgid privileges if not the running kernel so that bad 423 * guys can't print interesting stuff from kernel memory. 424 */ 425 if (dropgid) { 426 setgid(getgid()); 427 setuid(getuid()); 428 } 429 430 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 431 if (kd == 0) 432 errx(1, "%s", errbuf); 433 434 if (!_fmt) 435 parsefmt(dfmt, 0); 436 437 if (nselectors == 0) { 438 uidlist.ptr = malloc(sizeof(uid_t)); 439 if (uidlist.ptr == NULL) 440 errx(1, "malloc failed"); 441 nselectors = 1; 442 uidlist.count = uidlist.maxcount = 1; 443 *uidlist.uids = getuid(); 444 } 445 446 /* 447 * scan requested variables, noting what structures are needed, 448 * and adjusting header widths as appropriate. 449 */ 450 scanvars(); 451 452 /* 453 * Get process list. If the user requested just one selector- 454 * option, then kvm_getprocs can be asked to return just those 455 * processes. Otherwise, have it return all processes, and 456 * then this routine will search that full list and select the 457 * processes which match any of the user's selector-options. 458 */ 459 what = showthreads != 0 ? KERN_PROC_ALL : KERN_PROC_PROC; 460 flag = 0; 461 if (nselectors == 1) { 462 /* XXX - Apparently there's no KERN_PROC_GID flag. */ 463 if (pgrplist.count == 1) { 464 what = KERN_PROC_PGRP | showthreads; 465 flag = *pgrplist.pids; 466 nselectors = 0; 467 } else if (pidlist.count == 1) { 468 what = KERN_PROC_PID | showthreads; 469 flag = *pidlist.pids; 470 nselectors = 0; 471 } else if (ruidlist.count == 1) { 472 what = KERN_PROC_RUID | showthreads; 473 flag = *ruidlist.uids; 474 nselectors = 0; 475#if 0 /* XXX - KERN_PROC_SESSION causes error in kvm_getprocs? */ 476 } else if (sesslist.count == 1) { 477 what = KERN_PROC_SESSION | showthreads; 478 flag = *sesslist.pids; 479 nselectors = 0; 480#endif 481 } else if (ttylist.count == 1) { 482 what = KERN_PROC_TTY | showthreads; 483 flag = *ttylist.ttys; 484 nselectors = 0; 485 } else if (uidlist.count == 1) { 486 what = KERN_PROC_UID | showthreads; 487 flag = *uidlist.uids; 488 nselectors = 0; 489 } else if (all) { 490 /* No need for this routine to select processes. */ 491 nselectors = 0; 492 } 493 } 494 495 /* 496 * select procs 497 */ 498 nentries = -1; 499 kp = kvm_getprocs(kd, what, flag, &nentries); 500 if ((kp == 0 && nentries > 0) || (kp != 0 && nentries < 0)) 501 errx(1, "%s", kvm_geterr(kd)); 502 nkept = 0; 503 if (nentries > 0) { 504 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 505 errx(1, "malloc failed"); 506 for (i = nentries; --i >= 0; ++kp) { 507 /* 508 * If the user specified multiple selection-criteria, 509 * then keep any process matched by the inclusive OR 510 * of all the selection-criteria given. 511 */ 512 if (pidlist.count > 0) { 513 for (elem = 0; elem < pidlist.count; elem++) 514 if (kp->ki_pid == pidlist.pids[elem]) 515 goto keepit; 516 } 517 /* 518 * Note that we had to process pidlist before 519 * filtering out processes which do not have 520 * a controlling terminal. 521 */ 522 if (xkeep == 0) { 523 if ((kp->ki_tdev == NODEV || 524 (kp->ki_flag & P_CONTROLT) == 0)) 525 continue; 526 } 527 if (nselectors == 0) 528 goto keepit; 529 if (gidlist.count > 0) { 530 for (elem = 0; elem < gidlist.count; elem++) 531 if (kp->ki_rgid == gidlist.gids[elem]) 532 goto keepit; 533 } 534 if (pgrplist.count > 0) { 535 for (elem = 0; elem < pgrplist.count; elem++) 536 if (kp->ki_pgid == pgrplist.pids[elem]) 537 goto keepit; 538 } 539 if (ruidlist.count > 0) { 540 for (elem = 0; elem < ruidlist.count; elem++) 541 if (kp->ki_ruid == ruidlist.uids[elem]) 542 goto keepit; 543 } 544 if (sesslist.count > 0) { 545 for (elem = 0; elem < sesslist.count; elem++) 546 if (kp->ki_sid == sesslist.pids[elem]) 547 goto keepit; 548 } 549 if (ttylist.count > 0) { 550 for (elem = 0; elem < ttylist.count; elem++) 551 if (kp->ki_tdev == ttylist.ttys[elem]) 552 goto keepit; 553 } 554 if (uidlist.count > 0) { 555 for (elem = 0; elem < uidlist.count; elem++) 556 if (kp->ki_uid == uidlist.uids[elem]) 557 goto keepit; 558 } 559 /* 560 * This process did not match any of the user's 561 * selector-options, so skip the process. 562 */ 563 continue; 564 565 keepit: 566 kinfo[nkept].ki_p = kp; 567 if (needuser) 568 saveuser(&kinfo[nkept]); 569 dynsizevars(&kinfo[nkept]); 570 nkept++; 571 } 572 } 573 574 sizevars(); 575 576 /* 577 * print header 578 */ 579 printheader(); 580 if (nkept == 0) 581 exit(1); 582 583 /* 584 * sort proc list 585 */ 586 qsort(kinfo, nkept, sizeof(KINFO), pscomp); 587 /* 588 * For each process, call each variable output function. 589 */ 590 for (i = lineno = 0; i < nkept; i++) { 591 for (vent = vhead; vent; vent = vent->next) { 592 (vent->var->oproc)(&kinfo[i], vent); 593 if (vent->next != NULL) 594 (void)putchar(' '); 595 } 596 (void)putchar('\n'); 597 if (prtheader && lineno++ == prtheader - 4) { 598 (void)putchar('\n'); 599 printheader(); 600 lineno = 0; 601 } 602 } 603 free_list(&gidlist); 604 free_list(&pidlist); 605 free_list(&pgrplist); 606 free_list(&ruidlist); 607 free_list(&sesslist); 608 free_list(&ttylist); 609 free_list(&uidlist); 610 611 exit(eval); 612} 613 614static int 615addelem_gid(struct listinfo *inf, const char *elem) 616{ 617 struct group *grp; 618 intmax_t ltemp; 619 const char *nameorID; 620 char *endp; 621 622 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 623 if (*elem == '\0') 624 warnx("Invalid (zero-length) %s name", inf->lname); 625 else 626 warnx("%s name too long: %s", inf->lname, elem); 627 optfatal = 1; 628 return (0); /* Do not add this value */ 629 } 630 631 /* 632 * SUSv3 states that `ps -G grouplist' should match "real-group 633 * ID numbers", and does not mention group-names. I do want to 634 * also support group-names, so this tries for a group-id first, 635 * and only tries for a name if that doesn't work. This is the 636 * opposite order of what is done in addelem_uid(), but in 637 * practice the order would only matter for group-names which 638 * are all-numeric. 639 */ 640 grp = NULL; 641 nameorID = "named"; 642 errno = 0; 643 ltemp = strtol(elem, &endp, 10); 644 if (errno == 0 && *endp == '\0' && ltemp >= 0 && ltemp <= GID_MAX) { 645 nameorID = "name or ID matches"; 646 grp = getgrgid((gid_t)ltemp); 647 } 648 if (grp == NULL) 649 grp = getgrnam(elem); 650 if (grp == NULL) { 651 warnx("No %s %s '%s'", inf->lname, nameorID, elem); 652 optfatal = 1; 653 return (0); /* Do not add this value */ 654 } 655 656 if (inf->count >= inf->maxcount) 657 expand_list(inf); 658 inf->gids[(inf->count)++] = grp->gr_gid; 659 return (1); 660} 661 662#define BSD_PID_MAX 99999 /* Copy of PID_MAX from sys/proc.h */ 663static int 664addelem_pid(struct listinfo *inf, const char *elem) 665{ 666 long tempid; 667 char *endp; 668 669 if (*elem == '\0') 670 tempid = 0L; 671 else { 672 errno = 0; 673 tempid = strtol(elem, &endp, 10); 674 if (*endp != '\0' || tempid < 0 || elem == endp) { 675 warnx("Invalid %s: %s", inf->lname, elem); 676 errno = ERANGE; 677 } else if (errno != 0 || tempid > BSD_PID_MAX) { 678 warnx("%s too large: %s", inf->lname, elem); 679 errno = ERANGE; 680 } 681 if (errno == ERANGE) { 682 optfatal = 1; 683 return (0); /* Do not add this value */ 684 } 685 } 686 687 if (inf->count >= inf->maxcount) 688 expand_list(inf); 689 inf->pids[(inf->count)++] = tempid; 690 return (1); 691} 692#undef BSD_PID_MAX 693 694static int 695addelem_tty(struct listinfo *inf, const char *elem) 696{ 697 char pathbuf[PATH_MAX]; 698 struct stat sb; 699 const char *ttypath; 700 701 if (strcmp(elem, "co") == 0) 702 ttypath = strdup(_PATH_CONSOLE); 703 else if (*elem == '/') 704 ttypath = elem; 705 else { 706 strlcpy(pathbuf, _PATH_TTY, sizeof(pathbuf)); 707 strlcat(pathbuf, elem, sizeof(pathbuf)); 708 ttypath = pathbuf; 709 } 710 711 if (stat(ttypath, &sb) == -1) { 712 warn("%s", ttypath); 713 optfatal = 1; 714 return (0); /* Do not add this value */ 715 } 716 if (!S_ISCHR(sb.st_mode)) { 717 warn("%s: Not a terminal", ttypath); 718 optfatal = 1; 719 return (0); /* Do not add this value */ 720 } 721 722 if (inf->count >= inf->maxcount) 723 expand_list(inf); 724 inf->ttys[(inf->count)++] = sb.st_rdev; 725 return (1); 726} 727 728static int 729addelem_uid(struct listinfo *inf, const char *elem) 730{ 731 struct passwd *pwd; 732 intmax_t ltemp; 733 char *endp; 734 735 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 736 if (*elem == '\0') 737 warnx("Invalid (zero-length) %s name", inf->lname); 738 else 739 warnx("%s name too long: %s", inf->lname, elem); 740 optfatal = 1; 741 return (0); /* Do not add this value */ 742 } 743 744 pwd = getpwnam(elem); 745 if (pwd == NULL) { 746 errno = 0; 747 ltemp = strtol(elem, &endp, 10); 748 if (errno != 0 || *endp != '\0' || ltemp < 0 || 749 ltemp > UID_MAX) 750 warnx("No %s named '%s'", inf->lname, elem); 751 else { 752 /* The string is all digits, so it might be a userID. */ 753 pwd = getpwuid((uid_t)ltemp); 754 if (pwd == NULL) 755 warnx("No %s name or ID matches '%s'", 756 inf->lname, elem); 757 } 758 } 759 if (pwd == NULL) { 760 /* 761 * These used to be treated as minor warnings (and the 762 * option was simply ignored), but now they are fatal 763 * errors (and the command will be aborted). 764 */ 765 optfatal = 1; 766 return (0); /* Do not add this value */ 767 } 768 769 if (inf->count >= inf->maxcount) 770 expand_list(inf); 771 inf->uids[(inf->count)++] = pwd->pw_uid; 772 return (1); 773} 774 775static void 776add_list(struct listinfo *inf, const char *argp) 777{ 778 char elemcopy[PATH_MAX]; 779 const char *savep; 780 char *cp, *endp; 781 int toolong; 782 783 while (*argp != '\0') { 784 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 785 argp++; 786 savep = argp; 787 toolong = 0; 788 cp = elemcopy; 789 if (strchr(T_SEP, *argp) == NULL) { 790 endp = elemcopy + sizeof(elemcopy) - 1; 791 while (*argp != '\0' && cp <= endp && 792 strchr(W_SEP T_SEP, *argp) == NULL) 793 *cp++ = *argp++; 794 if (cp > endp) 795 toolong = 1; 796 } 797 if (!toolong) { 798 *cp = '\0'; 799#ifndef ADD_PS_LISTRESET 800 /* This is how the standard expects lists to be handled. */ 801 inf->addelem(inf, elemcopy); 802#else 803 /* 804 * This would add a simple non-standard-but-convienent feature. 805 * 806 * XXX - Adding this check increased the total size of `ps' by 807 * 3940 bytes on i386! That's 12% of the entire program! 808 * The `ps.o' file grew by only about 40 bytes, but the 809 * final (stripped) executable in /bin/ps grew by 12%. 810 */ 811 /* 812 * We now have a single element. Add it to the 813 * list, unless the element is ":". In that case, 814 * reset the list so previous entries are ignored. 815 */ 816 if (strcmp(elemcopy, ":") == 0) 817 inf->count = 0; 818 else 819 inf->addelem(inf, elemcopy); 820#endif 821 } else { 822 /* 823 * The string is too long to copy. Find the end 824 * of the string to print out the warning message. 825 */ 826 while (*argp != '\0' && strchr(W_SEP T_SEP, 827 *argp) == NULL) 828 argp++; 829 warnx("Value too long: %.*s", (int)(argp - savep), 830 savep); 831 optfatal = 1; 832 } 833 /* 834 * Skip over any number of trailing whitespace characters, 835 * but only one (at most) trailing element-terminating 836 * character. 837 */ 838 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 839 argp++; 840 if (*argp != '\0' && strchr(T_SEP, *argp) != NULL) { 841 argp++; 842 /* Catch case where string ended with a comma. */ 843 if (*argp == '\0') 844 inf->addelem(inf, argp); 845 } 846 } 847} 848 849static void * 850expand_list(struct listinfo *inf) 851{ 852 int newmax; 853 void *newlist; 854 855 newmax = (inf->maxcount + 1) << 1; 856 newlist = realloc(inf->ptr, newmax * inf->elemsize); 857 if (newlist == NULL) { 858 free(inf->ptr); 859 errx(1, "realloc to %d %ss failed", newmax, 860 inf->lname); 861 } 862 inf->maxcount = newmax; 863 inf->ptr = newlist; 864 865 return (newlist); 866} 867 868static void 869free_list(struct listinfo *inf) 870{ 871 872 inf->count = inf->elemsize = inf->maxcount = 0; 873 if (inf->ptr != NULL) 874 free(inf->ptr); 875 inf->addelem = NULL; 876 inf->lname = NULL; 877 inf->ptr = NULL; 878} 879 880static void 881init_list(struct listinfo *inf, addelem_rtn artn, int elemsize, 882 const char *lname) 883{ 884 885 inf->count = inf->maxcount = 0; 886 inf->elemsize = elemsize; 887 inf->addelem = artn; 888 inf->lname = lname; 889 inf->ptr = NULL; 890} 891 892VARENT * 893find_varentry(VAR *v) 894{ 895 struct varent *vent; 896 897 for (vent = vhead; vent; vent = vent->next) { 898 if (strcmp(vent->var->name, v->name) == 0) 899 return vent; 900 } 901 return NULL; 902} 903 904static void 905scanvars(void) 906{ 907 struct varent *vent; 908 VAR *v; 909 910 for (vent = vhead; vent; vent = vent->next) { 911 v = vent->var; 912 if (v->flag & DSIZ) { 913 v->dwidth = v->width; 914 v->width = 0; 915 } 916 if (v->flag & USER) 917 needuser = 1; 918 if (v->flag & COMM) 919 needcomm = 1; 920 } 921} 922 923static void 924dynsizevars(KINFO *ki) 925{ 926 struct varent *vent; 927 VAR *v; 928 int i; 929 930 for (vent = vhead; vent; vent = vent->next) { 931 v = vent->var; 932 if (!(v->flag & DSIZ)) 933 continue; 934 i = (v->sproc)( ki); 935 if (v->width < i) 936 v->width = i; 937 if (v->width > v->dwidth) 938 v->width = v->dwidth; 939 } 940} 941 942static void 943sizevars(void) 944{ 945 struct varent *vent; 946 VAR *v; 947 int i; 948 949 for (vent = vhead; vent; vent = vent->next) { 950 v = vent->var; 951 i = strlen(vent->header); 952 if (v->width < i) 953 v->width = i; 954 totwidth += v->width + 1; /* +1 for space */ 955 } 956 totwidth--; 957} 958 959static const char * 960fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki, 961 char *comm, int maxlen) 962{ 963 const char *s; 964 965 s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen); 966 return (s); 967} 968 969#define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM)) 970 971static void 972saveuser(KINFO *ki) 973{ 974 975 if (ki->ki_p->ki_sflag & PS_INMEM) { 976 /* 977 * The u-area might be swapped out, and we can't get 978 * at it because we have a crashdump and no swap. 979 * If it's here fill in these fields, otherwise, just 980 * leave them 0. 981 */ 982 ki->ki_valid = 1; 983 } else 984 ki->ki_valid = 0; 985 /* 986 * save arguments if needed 987 */ 988 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 989 ki->ki_args = strdup(fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 990 MAXCOMLEN)); 991 } else if (needcomm) { 992 asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm); 993 } else { 994 ki->ki_args = NULL; 995 } 996 if (needenv && UREADOK(ki)) { 997 ki->ki_env = strdup(fmt(kvm_getenvv, ki, (char *)NULL, 0)); 998 } else if (needenv) { 999 ki->ki_env = malloc(3); 1000 strcpy(ki->ki_env, "()"); 1001 } else { 1002 ki->ki_env = NULL; 1003 } 1004} 1005 1006static int 1007pscomp(const void *a, const void *b) 1008{ 1009 int i; 1010#define VSIZE(k) ((k)->ki_p->ki_dsize + (k)->ki_p->ki_ssize + \ 1011 (k)->ki_p->ki_tsize) 1012 1013 if (sortby == SORTCPU) 1014 return (getpcpu((const KINFO *)b) - getpcpu((const KINFO *)a)); 1015 if (sortby == SORTMEM) 1016 return (VSIZE((const KINFO *)b) - VSIZE((const KINFO *)a)); 1017 i = (int)((const KINFO *)a)->ki_p->ki_tdev - 1018 (int)((const KINFO *)b)->ki_p->ki_tdev; 1019 if (i == 0) 1020 i = ((const KINFO *)a)->ki_p->ki_pid - 1021 ((const KINFO *)b)->ki_p->ki_pid; 1022 return (i); 1023} 1024 1025/* 1026 * ICK (all for getopt), would rather hide the ugliness 1027 * here than taint the main code. 1028 * 1029 * ps foo -> ps -foo 1030 * ps 34 -> ps -p34 1031 * 1032 * The old convention that 't' with no trailing tty arg means the users 1033 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 1034 * feature is available with the option 'T', which takes no argument. 1035 */ 1036static char * 1037kludge_oldps_options(char *s) 1038{ 1039 int have_fmt; 1040 size_t len; 1041 char *newopts, *ns, *cp; 1042 1043 /* 1044 * If we have an 'o' option, then note it, since we don't want to do 1045 * some types of munging. 1046 */ 1047 have_fmt = index(s, 'o') != NULL; 1048 1049 len = strlen(s); 1050 if ((newopts = ns = malloc(len + 2)) == NULL) 1051 errx(1, "malloc failed"); 1052 /* 1053 * options begin with '-' 1054 */ 1055 if (*s != '-') 1056 *ns++ = '-'; /* add option flag */ 1057 /* 1058 * gaze to end of argv[1] 1059 */ 1060 cp = s + len - 1; 1061 /* 1062 * if last letter is a 't' flag with no argument (in the context 1063 * of the oldps options -- option string NOT starting with a '-' -- 1064 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 1065 * 1066 * However, if a flag accepting a string argument is found in the 1067 * option string, the remainder of the string is the argument to 1068 * that flag; do not modify that argument. 1069 */ 1070 if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-') 1071 *cp = 'T'; 1072 else { 1073 /* 1074 * otherwise check for trailing number, which *may* be a 1075 * pid. 1076 */ 1077 while (cp >= s && isdigit(*cp)) 1078 --cp; 1079 } 1080 cp++; 1081 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 1082 ns += cp - s; 1083 /* 1084 * if there's a trailing number, and not a preceding 'p' (pid) or 1085 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 1086 */ 1087 if (isdigit(*cp) && 1088 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 1089 (cp - 1 == s || cp[-2] != 't') && !have_fmt) 1090 *ns++ = 'p'; 1091 (void)strcpy(ns, cp); /* and append the number */ 1092 1093 return (newopts); 1094} 1095 1096static void 1097usage(void) 1098{ 1099#define SINGLE_OPTS "[-aC" OPT_LAZY_f "HhjlmrSTuvwXxZ]" 1100 1101 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 1102 "usage: ps " SINGLE_OPTS " [-G gid[,gid]] [-O|o fmt]", 1103 " [-p pid[,pid]] [-t tty[,tty]] [-U user[,user]]", 1104 " [-M core] [-N system]", 1105 " ps [-L]"); 1106 exit(1); 1107} 1108