ps.c revision 129600
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 129600 2004-05-22 23:13:58Z 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 87int cflag; /* -c */ 88int eval; /* Exit value */ 89time_t now; /* Current time(3) value */ 90int rawcpu; /* -C */ 91int sumrusage; /* -S */ 92int termwidth; /* Width of the screen (0 == infinity). */ 93int totwidth; /* Calculated-width of requested variables. */ 94 95struct varent *vhead; 96 97static int forceuread = DEF_UREAD; /* Do extra work to get u-area. */ 98static kvm_t *kd; 99static KINFO *kinfo; 100static int needcomm; /* -o "command" */ 101static int needenv; /* -e */ 102static int needuser; /* -o "user" */ 103static int optfatal; /* Fatal error parsing some list-option. */ 104 105static enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 106 107struct listinfo; 108typedef int addelem_rtn(struct listinfo *_inf, const char *_elem); 109 110struct listinfo { 111 int count; 112 int maxcount; 113 int elemsize; 114 addelem_rtn *addelem; 115 const char *lname; 116 union { 117 gid_t *gids; 118 pid_t *pids; 119 dev_t *ttys; 120 uid_t *uids; 121 void *ptr; 122 } l; 123}; 124 125static int addelem_gid(struct listinfo *, const char *); 126static int addelem_pid(struct listinfo *, const char *); 127static int addelem_tty(struct listinfo *, const char *); 128static int addelem_uid(struct listinfo *, const char *); 129static void add_list(struct listinfo *, const char *); 130static void dynsizevars(KINFO *); 131static void *expand_list(struct listinfo *); 132static const char * 133 fmt(char **(*)(kvm_t *, const struct kinfo_proc *, int), 134 KINFO *, char *, int); 135static void free_list(struct listinfo *); 136static void init_list(struct listinfo *, addelem_rtn, int, const char *); 137static char *kludge_oldps_options(char *); 138static int pscomp(const void *, const void *); 139static void saveuser(KINFO *); 140static void scanvars(void); 141static void sizevars(void); 142static void usage(void); 143 144static char dfmt[] = "pid,tt,state,time,command"; 145static char jfmt[] = "user,pid,ppid,pgid,jobc,state,tt,time,command"; 146static char lfmt[] = "uid,pid,ppid,cpu,pri,nice,vsz,rss,mwchan,state," 147 "tt,time,command"; 148static char o1[] = "pid"; 149static char o2[] = "tt,state,time,command"; 150static char ufmt[] = "user,pid,%cpu,%mem,vsz,rss,tt,state,start,time,command"; 151static char vfmt[] = "pid,state,time,sl,re,pagein,vsz,rss,lim,tsiz," 152 "%cpu,%mem,command"; 153static char Zfmt[] = "label"; 154 155#define PS_ARGS "AaCce" OPT_LAZY_f "G:gHhjLlM:mN:O:o:p:rSTt:U:uvwXxZ" 156 157int 158main(int argc, char *argv[]) 159{ 160 struct listinfo gidlist, pgrplist, pidlist; 161 struct listinfo ruidlist, sesslist, ttylist, uidlist; 162 struct kinfo_proc *kp; 163 struct varent *vent; 164 struct winsize ws; 165 const char *cp, *nlistf, *memf; 166 char *cols; 167 int all, ch, dropgid, elem, flag, _fmt, i, lineno; 168 int nentries, nocludge, nkept, nselectors; 169 int prtheader, showthreads, wflag, what, xkeep, xkeep_implied; 170 char errbuf[_POSIX2_LINE_MAX]; 171 172 (void) setlocale(LC_ALL, ""); 173 time(&now); /* Used by routines in print.c. */ 174 175 if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0') 176 termwidth = atoi(cols); 177 else if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 178 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 179 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 180 ws.ws_col == 0) 181 termwidth = 79; 182 else 183 termwidth = ws.ws_col - 1; 184 185 /* 186 * Don't apply a kludge if the first argument is an option taking an 187 * argument 188 */ 189 if (argc > 1) { 190 nocludge = 0; 191 if (argv[1][0] == '-') { 192 for (cp = PS_ARGS; *cp != '\0'; cp++) { 193 if (*cp != ':') 194 continue; 195 if (*(cp - 1) == argv[1][1]) { 196 nocludge = 1; 197 break; 198 } 199 } 200 } 201 if (nocludge == 0) 202 argv[1] = kludge_oldps_options(argv[1]); 203 } 204 205 all = dropgid = _fmt = nselectors = optfatal = 0; 206 prtheader = showthreads = wflag = xkeep_implied = 0; 207 xkeep = -1; /* Neither -x nor -X. */ 208 init_list(&gidlist, addelem_gid, sizeof(gid_t), "group"); 209 init_list(&pgrplist, addelem_pid, sizeof(pid_t), "process group"); 210 init_list(&pidlist, addelem_pid, sizeof(pid_t), "process id"); 211 init_list(&ruidlist, addelem_uid, sizeof(uid_t), "ruser"); 212 init_list(&sesslist, addelem_pid, sizeof(pid_t), "session id"); 213 init_list(&ttylist, addelem_tty, sizeof(dev_t), "tty"); 214 init_list(&uidlist, addelem_uid, sizeof(uid_t), "user"); 215 memf = nlistf = _PATH_DEVNULL; 216 while ((ch = getopt(argc, argv, PS_ARGS)) != -1) 217 switch((char)ch) { 218 case 'A': 219 /* 220 * Exactly the same as `-ax'. This has been 221 * added for compatability with SUSv3, but for 222 * now it will not be described in the man page. 223 */ 224 nselectors++; 225 all = xkeep = 1; 226 break; 227 case 'a': 228 nselectors++; 229 all = 1; 230 break; 231 case 'C': 232 rawcpu = 1; 233 break; 234 case 'c': 235 cflag = 1; 236 break; 237 case 'e': /* XXX set ufmt */ 238 needenv = 1; 239 break; 240#ifdef LAZY_PS 241 case 'f': 242 if (getuid() == 0 || getgid() == 0) 243 forceuread = 1; 244 break; 245#endif 246 case 'G': 247 add_list(&gidlist, optarg); 248 xkeep_implied = 1; 249 nselectors++; 250 break; 251 case 'g': 252#if 0 253 /*- 254 * XXX - This SUSv3 behavior is still under debate 255 * since it conflicts with the (undocumented) 256 * `-g' option. So we skip it for now. 257 */ 258 add_list(&pgrplist, optarg); 259 xkeep_implied = 1; 260 nselectors++; 261 break; 262#else 263 /* The historical BSD-ish (from SunOS) behavior. */ 264 break; /* no-op */ 265#endif 266 case 'H': 267 showthreads = KERN_PROC_INC_THREAD; 268 break; 269 case 'h': 270 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 271 break; 272 case 'j': 273 parsefmt(jfmt, 0); 274 _fmt = 1; 275 jfmt[0] = '\0'; 276 break; 277 case 'L': 278 showkey(); 279 exit(0); 280 case 'l': 281 parsefmt(lfmt, 0); 282 _fmt = 1; 283 lfmt[0] = '\0'; 284 break; 285 case 'M': 286 memf = optarg; 287 dropgid = 1; 288 break; 289 case 'm': 290 sortby = SORTMEM; 291 break; 292 case 'N': 293 nlistf = optarg; 294 dropgid = 1; 295 break; 296 case 'O': 297 parsefmt(o1, 1); 298 parsefmt(optarg, 1); 299 parsefmt(o2, 1); 300 o1[0] = o2[0] = '\0'; 301 _fmt = 1; 302 break; 303 case 'o': 304 parsefmt(optarg, 1); 305 _fmt = 1; 306 break; 307 case 'p': 308 add_list(&pidlist, optarg); 309 /* 310 * Note: `-p' does not *set* xkeep, but any values 311 * from pidlist are checked before xkeep is. That 312 * way they are always matched, even if the user 313 * specifies `-X'. 314 */ 315 nselectors++; 316 break; 317#if 0 318 case 'R': 319 /*- 320 * XXX - This un-standard option is still under 321 * debate. This is what SUSv3 defines as 322 * the `-U' option, and while it would be 323 * nice to have, it could cause even more 324 * confusion to implement it as `-R'. 325 */ 326 add_list(&ruidlist, optarg); 327 xkeep_implied = 1; 328 nselectors++; 329 break; 330#endif 331 case 'r': 332 sortby = SORTCPU; 333 break; 334 case 'S': 335 sumrusage = 1; 336 break; 337#if 0 338 case 's': 339 /*- 340 * XXX - This non-standard option is still under 341 * debate. This *is* supported on Solaris, 342 * Linux, and IRIX, but conflicts with `-s' 343 * on NetBSD and maybe some older BSD's. 344 */ 345 add_list(&sesslist, optarg); 346 xkeep_implied = 1; 347 nselectors++; 348 break; 349#endif 350 case 'T': 351 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 352 errx(1, "stdin: not a terminal"); 353 /* FALLTHROUGH */ 354 case 't': 355 add_list(&ttylist, optarg); 356 xkeep_implied = 1; 357 nselectors++; 358 break; 359 case 'U': 360 /* This is what SUSv3 defines as the `-u' option. */ 361 add_list(&uidlist, optarg); 362 xkeep_implied = 1; 363 nselectors++; 364 break; 365 case 'u': 366 parsefmt(ufmt, 0); 367 sortby = SORTCPU; 368 _fmt = 1; 369 ufmt[0] = '\0'; 370 break; 371 case 'v': 372 parsefmt(vfmt, 0); 373 sortby = SORTMEM; 374 _fmt = 1; 375 vfmt[0] = '\0'; 376 break; 377 case 'w': 378 if (wflag) 379 termwidth = UNLIMITED; 380 else if (termwidth < 131) 381 termwidth = 131; 382 wflag++; 383 break; 384 case 'X': 385 /* 386 * Note that `-X' and `-x' are not standard "selector" 387 * options. For most selector-options, we check *all* 388 * processes to see if any are matched by the given 389 * value(s). After we have a set of all the matched 390 * processes, then `-X' and `-x' govern whether we 391 * modify that *matched* set for processes which do 392 * not have a controlling terminal. `-X' causes 393 * those processes to be deleted from the matched 394 * set, while `-x' causes them to be kept. 395 */ 396 xkeep = 0; 397 break; 398 case 'x': 399 xkeep = 1; 400 break; 401 case 'Z': 402 parsefmt(Zfmt, 0); 403 Zfmt[0] = '\0'; 404 break; 405 case '?': 406 default: 407 usage(); 408 } 409 argc -= optind; 410 argv += optind; 411 if (optfatal) 412 exit(1); /* Error messages already printed. */ 413 if (xkeep < 0) /* Neither -X nor -x was specified. */ 414 xkeep = xkeep_implied; 415 416#define BACKWARD_COMPATIBILITY 417#ifdef BACKWARD_COMPATIBILITY 418 if (*argv) { 419 nlistf = *argv; 420 if (*++argv) 421 memf = *argv; 422 } 423#endif 424 /* 425 * Discard setgid privileges if not the running kernel so that bad 426 * guys can't print interesting stuff from kernel memory. 427 */ 428 if (dropgid) { 429 setgid(getgid()); 430 setuid(getuid()); 431 } 432 433 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 434 if (kd == 0) 435 errx(1, "%s", errbuf); 436 437 if (!_fmt) 438 parsefmt(dfmt, 0); 439 440 if (nselectors == 0) { 441 uidlist.l.ptr = malloc(sizeof(uid_t)); 442 if (uidlist.l.ptr == NULL) 443 errx(1, "malloc failed"); 444 nselectors = 1; 445 uidlist.count = uidlist.maxcount = 1; 446 *uidlist.l.uids = getuid(); 447 } 448 449 /* 450 * scan requested variables, noting what structures are needed, 451 * and adjusting header widths as appropriate. 452 */ 453 scanvars(); 454 455 /* 456 * Get process list. If the user requested just one selector- 457 * option, then kvm_getprocs can be asked to return just those 458 * processes. Otherwise, have it return all processes, and 459 * then this routine will search that full list and select the 460 * processes which match any of the user's selector-options. 461 */ 462 what = showthreads != 0 ? KERN_PROC_ALL : KERN_PROC_PROC; 463 flag = 0; 464 if (nselectors == 1) { 465 if (gidlist.count == 1) { 466 what = KERN_PROC_RGID | showthreads; 467 flag = *gidlist.l.gids; 468 nselectors = 0; 469 } else if (pgrplist.count == 1) { 470 what = KERN_PROC_PGRP | showthreads; 471 flag = *pgrplist.l.pids; 472 nselectors = 0; 473 } else if (pidlist.count == 1) { 474 what = KERN_PROC_PID | showthreads; 475 flag = *pidlist.l.pids; 476 nselectors = 0; 477 } else if (ruidlist.count == 1) { 478 what = KERN_PROC_RUID | showthreads; 479 flag = *ruidlist.l.uids; 480 nselectors = 0; 481 } else if (sesslist.count == 1) { 482 what = KERN_PROC_SESSION | showthreads; 483 flag = *sesslist.l.pids; 484 nselectors = 0; 485 } else if (ttylist.count == 1) { 486 what = KERN_PROC_TTY | showthreads; 487 flag = *ttylist.l.ttys; 488 nselectors = 0; 489 } else if (uidlist.count == 1) { 490 what = KERN_PROC_UID | showthreads; 491 flag = *uidlist.l.uids; 492 nselectors = 0; 493 } else if (all) { 494 /* No need for this routine to select processes. */ 495 nselectors = 0; 496 } 497 } 498 499 /* 500 * select procs 501 */ 502 nentries = -1; 503 kp = kvm_getprocs(kd, what, flag, &nentries); 504 if ((kp == NULL && nentries > 0) || (kp != NULL && nentries < 0)) 505 errx(1, "%s", kvm_geterr(kd)); 506 nkept = 0; 507 if (nentries > 0) { 508 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 509 errx(1, "malloc failed"); 510 for (i = nentries; --i >= 0; ++kp) { 511 /* 512 * If the user specified multiple selection-criteria, 513 * then keep any process matched by the inclusive OR 514 * of all the selection-criteria given. 515 */ 516 if (pidlist.count > 0) { 517 for (elem = 0; elem < pidlist.count; elem++) 518 if (kp->ki_pid == pidlist.l.pids[elem]) 519 goto keepit; 520 } 521 /* 522 * Note that we had to process pidlist before 523 * filtering out processes which do not have 524 * a controlling terminal. 525 */ 526 if (xkeep == 0) { 527 if ((kp->ki_tdev == NODEV || 528 (kp->ki_flag & P_CONTROLT) == 0)) 529 continue; 530 } 531 if (nselectors == 0) 532 goto keepit; 533 if (gidlist.count > 0) { 534 for (elem = 0; elem < gidlist.count; elem++) 535 if (kp->ki_rgid == gidlist.l.gids[elem]) 536 goto keepit; 537 } 538 if (pgrplist.count > 0) { 539 for (elem = 0; elem < pgrplist.count; elem++) 540 if (kp->ki_pgid == 541 pgrplist.l.pids[elem]) 542 goto keepit; 543 } 544 if (ruidlist.count > 0) { 545 for (elem = 0; elem < ruidlist.count; elem++) 546 if (kp->ki_ruid == 547 ruidlist.l.uids[elem]) 548 goto keepit; 549 } 550 if (sesslist.count > 0) { 551 for (elem = 0; elem < sesslist.count; elem++) 552 if (kp->ki_sid == sesslist.l.pids[elem]) 553 goto keepit; 554 } 555 if (ttylist.count > 0) { 556 for (elem = 0; elem < ttylist.count; elem++) 557 if (kp->ki_tdev == ttylist.l.ttys[elem]) 558 goto keepit; 559 } 560 if (uidlist.count > 0) { 561 for (elem = 0; elem < uidlist.count; elem++) 562 if (kp->ki_uid == uidlist.l.uids[elem]) 563 goto keepit; 564 } 565 /* 566 * This process did not match any of the user's 567 * selector-options, so skip the process. 568 */ 569 continue; 570 571 keepit: 572 kinfo[nkept].ki_p = kp; 573 if (needuser) 574 saveuser(&kinfo[nkept]); 575 dynsizevars(&kinfo[nkept]); 576 nkept++; 577 } 578 } 579 580 sizevars(); 581 582 /* 583 * print header 584 */ 585 printheader(); 586 if (nkept == 0) 587 exit(1); 588 589 /* 590 * sort proc list 591 */ 592 qsort(kinfo, nkept, sizeof(KINFO), pscomp); 593 /* 594 * For each process, call each variable output function. 595 */ 596 for (i = lineno = 0; i < nkept; i++) { 597 for (vent = vhead; vent; vent = vent->next) { 598 (vent->var->oproc)(&kinfo[i], vent); 599 if (vent->next != NULL) 600 (void)putchar(' '); 601 } 602 (void)putchar('\n'); 603 if (prtheader && lineno++ == prtheader - 4) { 604 (void)putchar('\n'); 605 printheader(); 606 lineno = 0; 607 } 608 } 609 free_list(&gidlist); 610 free_list(&pidlist); 611 free_list(&pgrplist); 612 free_list(&ruidlist); 613 free_list(&sesslist); 614 free_list(&ttylist); 615 free_list(&uidlist); 616 617 exit(eval); 618} 619 620static int 621addelem_gid(struct listinfo *inf, const char *elem) 622{ 623 struct group *grp; 624 const char *nameorID; 625 char *endp; 626 u_long bigtemp; 627 628 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 629 if (*elem == '\0') 630 warnx("Invalid (zero-length) %s name", inf->lname); 631 else 632 warnx("%s name too long: %s", inf->lname, elem); 633 optfatal = 1; 634 return (0); /* Do not add this value. */ 635 } 636 637 /* 638 * SUSv3 states that `ps -G grouplist' should match "real-group 639 * ID numbers", and does not mention group-names. I do want to 640 * also support group-names, so this tries for a group-id first, 641 * and only tries for a name if that doesn't work. This is the 642 * opposite order of what is done in addelem_uid(), but in 643 * practice the order would only matter for group-names which 644 * are all-numeric. 645 */ 646 grp = NULL; 647 nameorID = "named"; 648 errno = 0; 649 bigtemp = strtoul(elem, &endp, 10); 650 if (errno == 0 && *endp == '\0' && bigtemp <= GID_MAX) { 651 nameorID = "name or ID matches"; 652 grp = getgrgid((gid_t)bigtemp); 653 } 654 if (grp == NULL) 655 grp = getgrnam(elem); 656 if (grp == NULL) { 657 warnx("No %s %s '%s'", inf->lname, nameorID, elem); 658 optfatal = 1; 659 return (0); /* Do not add this value. */ 660 } 661 662 if (inf->count >= inf->maxcount) 663 expand_list(inf); 664 inf->l.gids[(inf->count)++] = grp->gr_gid; 665 return (1); 666} 667 668#define BSD_PID_MAX 99999 /* Copy of PID_MAX from sys/proc.h. */ 669static int 670addelem_pid(struct listinfo *inf, const char *elem) 671{ 672 char *endp; 673 long tempid; 674 675 if (*elem == '\0') 676 tempid = 0L; 677 else { 678 errno = 0; 679 tempid = strtol(elem, &endp, 10); 680 if (*endp != '\0' || tempid < 0 || elem == endp) { 681 warnx("Invalid %s: %s", inf->lname, elem); 682 errno = ERANGE; 683 } else if (errno != 0 || tempid > BSD_PID_MAX) { 684 warnx("%s too large: %s", inf->lname, elem); 685 errno = ERANGE; 686 } 687 if (errno == ERANGE) { 688 optfatal = 1; 689 return (0); /* Do not add this value. */ 690 } 691 } 692 693 if (inf->count >= inf->maxcount) 694 expand_list(inf); 695 inf->l.pids[(inf->count)++] = tempid; 696 return (1); 697} 698#undef BSD_PID_MAX 699 700static int 701addelem_tty(struct listinfo *inf, const char *elem) 702{ 703 const char *ttypath; 704 struct stat sb; 705 char pathbuf[PATH_MAX]; 706 707 if (strcmp(elem, "co") == 0) 708 ttypath = strdup(_PATH_CONSOLE); 709 else if (*elem == '/') 710 ttypath = elem; 711 else { 712 strlcpy(pathbuf, _PATH_TTY, sizeof(pathbuf)); 713 strlcat(pathbuf, elem, sizeof(pathbuf)); 714 ttypath = pathbuf; 715 } 716 717 if (stat(ttypath, &sb) == -1) { 718 warn("%s", ttypath); 719 optfatal = 1; 720 return (0); /* Do not add this value. */ 721 } 722 if (!S_ISCHR(sb.st_mode)) { 723 warn("%s: Not a terminal", ttypath); 724 optfatal = 1; 725 return (0); /* Do not add this value. */ 726 } 727 728 if (inf->count >= inf->maxcount) 729 expand_list(inf); 730 inf->l.ttys[(inf->count)++] = sb.st_rdev; 731 return (1); 732} 733 734static int 735addelem_uid(struct listinfo *inf, const char *elem) 736{ 737 struct passwd *pwd; 738 char *endp; 739 u_long bigtemp; 740 741 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 742 if (*elem == '\0') 743 warnx("Invalid (zero-length) %s name", inf->lname); 744 else 745 warnx("%s name too long: %s", inf->lname, elem); 746 optfatal = 1; 747 return (0); /* Do not add this value. */ 748 } 749 750 pwd = getpwnam(elem); 751 if (pwd == NULL) { 752 errno = 0; 753 bigtemp = strtoul(elem, &endp, 10); 754 if (errno != 0 || *endp != '\0' || bigtemp > UID_MAX) 755 warnx("No %s named '%s'", inf->lname, elem); 756 else { 757 /* The string is all digits, so it might be a userID. */ 758 pwd = getpwuid((uid_t)bigtemp); 759 if (pwd == NULL) 760 warnx("No %s name or ID matches '%s'", 761 inf->lname, elem); 762 } 763 } 764 if (pwd == NULL) { 765 /* 766 * These used to be treated as minor warnings (and the 767 * option was simply ignored), but now they are fatal 768 * errors (and the command will be aborted). 769 */ 770 optfatal = 1; 771 return (0); /* Do not add this value. */ 772 } 773 774 if (inf->count >= inf->maxcount) 775 expand_list(inf); 776 inf->l.uids[(inf->count)++] = pwd->pw_uid; 777 return (1); 778} 779 780static void 781add_list(struct listinfo *inf, const char *argp) 782{ 783 const char *savep; 784 char *cp, *endp; 785 int toolong; 786 char elemcopy[PATH_MAX]; 787 788 while (*argp != '\0') { 789 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 790 argp++; 791 savep = argp; 792 toolong = 0; 793 cp = elemcopy; 794 if (strchr(T_SEP, *argp) == NULL) { 795 endp = elemcopy + sizeof(elemcopy) - 1; 796 while (*argp != '\0' && cp <= endp && 797 strchr(W_SEP T_SEP, *argp) == NULL) 798 *cp++ = *argp++; 799 if (cp > endp) 800 toolong = 1; 801 } 802 if (!toolong) { 803 *cp = '\0'; 804#ifndef ADD_PS_LISTRESET 805 /* 806 * This is how the standard expects lists to 807 * be handled. 808 */ 809 inf->addelem(inf, elemcopy); 810#else 811 /*- 812 * This would add a simple non-standard-but-convienent 813 * feature. 814 * 815 * XXX - The first time I tried to add this check, 816 * it increased the total size of `ps' by 3940 817 * bytes on i386! That's 12% of the entire 818 * program! The `ps.o' file grew by only about 819 * 40 bytes, but the final (stripped) executable 820 * in /bin/ps grew by 12%. I have not had time 821 * to investigate, so skip the feature for now. 822 */ 823 /* 824 * We now have a single element. Add it to the 825 * list, unless the element is ":". In that case, 826 * reset the list so previous entries are ignored. 827 */ 828 if (strcmp(elemcopy, ":") == 0) 829 inf->count = 0; 830 else 831 inf->addelem(inf, elemcopy); 832#endif 833 } else { 834 /* 835 * The string is too long to copy. Find the end 836 * of the string to print out the warning message. 837 */ 838 while (*argp != '\0' && strchr(W_SEP T_SEP, 839 *argp) == NULL) 840 argp++; 841 warnx("Value too long: %.*s", (int)(argp - savep), 842 savep); 843 optfatal = 1; 844 } 845 /* 846 * Skip over any number of trailing whitespace characters, 847 * but only one (at most) trailing element-terminating 848 * character. 849 */ 850 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 851 argp++; 852 if (*argp != '\0' && strchr(T_SEP, *argp) != NULL) { 853 argp++; 854 /* Catch case where string ended with a comma. */ 855 if (*argp == '\0') 856 inf->addelem(inf, argp); 857 } 858 } 859} 860 861static void * 862expand_list(struct listinfo *inf) 863{ 864 void *newlist; 865 int newmax; 866 867 newmax = (inf->maxcount + 1) << 1; 868 newlist = realloc(inf->l.ptr, newmax * inf->elemsize); 869 if (newlist == NULL) { 870 free(inf->l.ptr); 871 errx(1, "realloc to %d %ss failed", newmax, 872 inf->lname); 873 } 874 inf->maxcount = newmax; 875 inf->l.ptr = newlist; 876 877 return (newlist); 878} 879 880static void 881free_list(struct listinfo *inf) 882{ 883 884 inf->count = inf->elemsize = inf->maxcount = 0; 885 if (inf->l.ptr != NULL) 886 free(inf->l.ptr); 887 inf->addelem = NULL; 888 inf->lname = NULL; 889 inf->l.ptr = NULL; 890} 891 892static void 893init_list(struct listinfo *inf, addelem_rtn artn, int elemsize, 894 const char *lname) 895{ 896 897 inf->count = inf->maxcount = 0; 898 inf->elemsize = elemsize; 899 inf->addelem = artn; 900 inf->lname = lname; 901 inf->l.ptr = NULL; 902} 903 904VARENT * 905find_varentry(VAR *v) 906{ 907 struct varent *vent; 908 909 for (vent = vhead; vent; vent = vent->next) { 910 if (strcmp(vent->var->name, v->name) == 0) 911 return vent; 912 } 913 return NULL; 914} 915 916static void 917scanvars(void) 918{ 919 struct varent *vent; 920 VAR *v; 921 922 for (vent = vhead; vent; vent = vent->next) { 923 v = vent->var; 924 if (v->flag & DSIZ) { 925 v->dwidth = v->width; 926 v->width = 0; 927 } 928 if (v->flag & USER) 929 needuser = 1; 930 if (v->flag & COMM) 931 needcomm = 1; 932 } 933} 934 935static void 936dynsizevars(KINFO *ki) 937{ 938 struct varent *vent; 939 VAR *v; 940 int i; 941 942 for (vent = vhead; vent; vent = vent->next) { 943 v = vent->var; 944 if (!(v->flag & DSIZ)) 945 continue; 946 i = (v->sproc)( ki); 947 if (v->width < i) 948 v->width = i; 949 if (v->width > v->dwidth) 950 v->width = v->dwidth; 951 } 952} 953 954static void 955sizevars(void) 956{ 957 struct varent *vent; 958 VAR *v; 959 int i; 960 961 for (vent = vhead; vent; vent = vent->next) { 962 v = vent->var; 963 i = strlen(vent->header); 964 if (v->width < i) 965 v->width = i; 966 totwidth += v->width + 1; /* +1 for space */ 967 } 968 totwidth--; 969} 970 971static const char * 972fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki, 973 char *comm, int maxlen) 974{ 975 const char *s; 976 977 s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen); 978 return (s); 979} 980 981#define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM)) 982 983static void 984saveuser(KINFO *ki) 985{ 986 987 if (ki->ki_p->ki_sflag & PS_INMEM) { 988 /* 989 * The u-area might be swapped out, and we can't get 990 * at it because we have a crashdump and no swap. 991 * If it's here fill in these fields, otherwise, just 992 * leave them 0. 993 */ 994 ki->ki_valid = 1; 995 } else 996 ki->ki_valid = 0; 997 /* 998 * save arguments if needed 999 */ 1000 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 1001 ki->ki_args = strdup(fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 1002 MAXCOMLEN)); 1003 } else if (needcomm) { 1004 asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm); 1005 } else { 1006 ki->ki_args = NULL; 1007 } 1008 if (needenv && UREADOK(ki)) { 1009 ki->ki_env = strdup(fmt(kvm_getenvv, ki, (char *)NULL, 0)); 1010 } else if (needenv) { 1011 ki->ki_env = malloc(3); 1012 strcpy(ki->ki_env, "()"); 1013 } else { 1014 ki->ki_env = NULL; 1015 } 1016} 1017 1018static int 1019pscomp(const void *a, const void *b) 1020{ 1021 const KINFO *ka, *kb; 1022 double cpua, cpub; 1023 segsz_t sizea, sizeb; 1024 1025 ka = a; 1026 kb = b; 1027 /* SORTCPU and SORTMEM are sorted in descending order. */ 1028 if (sortby == SORTCPU) { 1029 cpua = getpcpu(ka); 1030 cpub = getpcpu(kb); 1031 if (cpua < cpub) 1032 return (1); 1033 if (cpua > cpub) 1034 return (-1); 1035 } 1036 if (sortby == SORTMEM) { 1037 sizea = ka->ki_p->ki_tsize + ka->ki_p->ki_dsize + 1038 ka->ki_p->ki_ssize; 1039 sizeb = kb->ki_p->ki_tsize + kb->ki_p->ki_dsize + 1040 kb->ki_p->ki_ssize; 1041 if (sizea < sizeb) 1042 return (1); 1043 if (sizea > sizeb) 1044 return (-1); 1045 } 1046 /* 1047 * TTY's are sorted in ascending order, except that all NODEV 1048 * processes come before all processes with a device. 1049 */ 1050 if (ka->ki_p->ki_tdev == NODEV && kb->ki_p->ki_tdev != NODEV) 1051 return (-1); 1052 if (ka->ki_p->ki_tdev != NODEV && kb->ki_p->ki_tdev == NODEV) 1053 return (1); 1054 if (ka->ki_p->ki_tdev < kb->ki_p->ki_tdev) 1055 return (-1); 1056 if (ka->ki_p->ki_tdev > kb->ki_p->ki_tdev) 1057 return (1); 1058 /* PID's are sorted in ascending order. */ 1059 if (ka->ki_p->ki_pid < kb->ki_p->ki_pid) 1060 return (-1); 1061 if (ka->ki_p->ki_pid > kb->ki_p->ki_pid) 1062 return (1); 1063 return (0); 1064} 1065 1066/* 1067 * ICK (all for getopt), would rather hide the ugliness 1068 * here than taint the main code. 1069 * 1070 * ps foo -> ps -foo 1071 * ps 34 -> ps -p34 1072 * 1073 * The old convention that 't' with no trailing tty arg means the users 1074 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 1075 * feature is available with the option 'T', which takes no argument. 1076 */ 1077static char * 1078kludge_oldps_options(char *s) 1079{ 1080 int have_fmt; 1081 size_t len; 1082 char *newopts, *ns, *cp; 1083 1084 /* 1085 * If we have an 'o' option, then note it, since we don't want to do 1086 * some types of munging. 1087 */ 1088 have_fmt = index(s, 'o') != NULL; 1089 1090 len = strlen(s); 1091 if ((newopts = ns = malloc(len + 2)) == NULL) 1092 errx(1, "malloc failed"); 1093 /* 1094 * options begin with '-' 1095 */ 1096 if (*s != '-') 1097 *ns++ = '-'; /* add option flag */ 1098 /* 1099 * gaze to end of argv[1] 1100 */ 1101 cp = s + len - 1; 1102 /* 1103 * if last letter is a 't' flag with no argument (in the context 1104 * of the oldps options -- option string NOT starting with a '-' -- 1105 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 1106 * 1107 * However, if a flag accepting a string argument is found in the 1108 * option string, the remainder of the string is the argument to 1109 * that flag; do not modify that argument. 1110 */ 1111 if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-') 1112 *cp = 'T'; 1113 else { 1114 /* 1115 * otherwise check for trailing number, which *may* be a 1116 * pid. 1117 */ 1118 while (cp >= s && isdigit(*cp)) 1119 --cp; 1120 } 1121 cp++; 1122 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 1123 ns += cp - s; 1124 /* 1125 * if there's a trailing number, and not a preceding 'p' (pid) or 1126 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 1127 */ 1128 if (isdigit(*cp) && 1129 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 1130 (cp - 1 == s || cp[-2] != 't') && !have_fmt) 1131 *ns++ = 'p'; 1132 (void)strcpy(ns, cp); /* and append the number */ 1133 1134 return (newopts); 1135} 1136 1137static void 1138usage(void) 1139{ 1140#define SINGLE_OPTS "[-aC" OPT_LAZY_f "HhjlmrSTuvwXxZ]" 1141 1142 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 1143 "usage: ps " SINGLE_OPTS " [-G gid[,gid]] [-O|o fmt]", 1144 " [-p pid[,pid]] [-t tty[,tty]] [-U user[,user]]", 1145 " [-M core] [-N system]", 1146 " ps [-L]"); 1147 exit(1); 1148} 1149