ps.c revision 129915
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 129915 2004-06-01 02:31:44Z gad $"); 51 52#include <sys/param.h> 53#include <sys/proc.h> 54#include <sys/user.h> 55#include <sys/stat.h> 56#include <sys/ioctl.h> 57#include <sys/sysctl.h> 58 59#include <ctype.h> 60#include <err.h> 61#include <errno.h> 62#include <fcntl.h> 63#include <grp.h> 64#include <kvm.h> 65#include <limits.h> 66#include <locale.h> 67#include <paths.h> 68#include <pwd.h> 69#include <stdio.h> 70#include <stdlib.h> 71#include <string.h> 72#include <unistd.h> 73 74#include "ps.h" 75 76#define W_SEP " \t" /* "Whitespace" list separators */ 77#define T_SEP "," /* "Terminate-element" list separators */ 78 79#ifdef LAZY_PS 80#define DEF_UREAD 0 81#define OPT_LAZY_f "f" 82#else 83#define DEF_UREAD 1 /* Always do the more-expensive read. */ 84#define OPT_LAZY_f /* I.e., the `-f' option is not added. */ 85#endif 86 87/* 88 * isdigit is defined to work on an 'int', in the range 0 to 255, plus EOF. 89 * Define a wrapper which can take 'char', either signed or unsigned. 90 */ 91#define isdigitch(Anychar) isdigit(((int) Anychar) & 255) 92 93int cflag; /* -c */ 94int eval; /* Exit value */ 95time_t now; /* Current time(3) value */ 96int rawcpu; /* -C */ 97int sumrusage; /* -S */ 98int termwidth; /* Width of the screen (0 == infinity). */ 99int totwidth; /* Calculated-width of requested variables. */ 100 101struct varent *vhead; 102 103static int forceuread = DEF_UREAD; /* Do extra work to get u-area. */ 104static kvm_t *kd; 105static KINFO *kinfo; 106static int needcomm; /* -o "command" */ 107static int needenv; /* -e */ 108static int needuser; /* -o "user" */ 109static int optfatal; /* Fatal error parsing some list-option. */ 110 111static enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 112 113struct listinfo; 114typedef int addelem_rtn(struct listinfo *_inf, const char *_elem); 115 116struct listinfo { 117 int count; 118 int maxcount; 119 int elemsize; 120 addelem_rtn *addelem; 121 const char *lname; 122 union { 123 gid_t *gids; 124 pid_t *pids; 125 dev_t *ttys; 126 uid_t *uids; 127 void *ptr; 128 } l; 129}; 130 131static int addelem_gid(struct listinfo *, const char *); 132static int addelem_pid(struct listinfo *, const char *); 133static int addelem_tty(struct listinfo *, const char *); 134static int addelem_uid(struct listinfo *, const char *); 135static void add_list(struct listinfo *, const char *); 136static void dynsizevars(KINFO *); 137static void *expand_list(struct listinfo *); 138static const char * 139 fmt(char **(*)(kvm_t *, const struct kinfo_proc *, int), 140 KINFO *, char *, int); 141static void free_list(struct listinfo *); 142static void init_list(struct listinfo *, addelem_rtn, int, const char *); 143static char *kludge_oldps_options(const char *opts, char *, const char *); 144static int pscomp(const void *, const void *); 145static void saveuser(KINFO *); 146static void scanvars(void); 147static void sizevars(void); 148static void usage(void); 149 150static char dfmt[] = "pid,tt,state,time,command"; 151static char jfmt[] = "user,pid,ppid,pgid,sid,jobc,state,tt,time,command"; 152static char lfmt[] = "uid,pid,ppid,cpu,pri,nice,vsz,rss,mwchan,state," 153 "tt,time,command"; 154static char o1[] = "pid"; 155static char o2[] = "tt,state,time,command"; 156static char ufmt[] = "user,pid,%cpu,%mem,vsz,rss,tt,state,start,time,command"; 157static char vfmt[] = "pid,state,time,sl,re,pagein,vsz,rss,lim,tsiz," 158 "%cpu,%mem,command"; 159static char Zfmt[] = "label"; 160 161#define PS_ARGS "AaCce" OPT_LAZY_f "G:gHhjLlM:mN:O:o:p:rSTt:U:uvwXxZ" 162 163int 164main(int argc, char *argv[]) 165{ 166 struct listinfo gidlist, pgrplist, pidlist; 167 struct listinfo ruidlist, sesslist, ttylist, uidlist; 168 struct kinfo_proc *kp; 169 struct varent *vent; 170 struct winsize ws; 171 const char *nlistf, *memf; 172 char *cols; 173 int all, ch, dropgid, elem, flag, _fmt, i, lineno; 174 int nentries, nkept, nselectors; 175 int prtheader, showthreads, wflag, what, xkeep, xkeep_implied; 176 char errbuf[_POSIX2_LINE_MAX]; 177 178 (void) setlocale(LC_ALL, ""); 179 time(&now); /* Used by routines in print.c. */ 180 181 if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0') 182 termwidth = atoi(cols); 183 else if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 184 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 185 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 186 ws.ws_col == 0) 187 termwidth = 79; 188 else 189 termwidth = ws.ws_col - 1; 190 191 /* 192 * Hide a number of option-processing kludges in a separate routine, 193 * to support some historical BSD behaviors, such as `ps axu'. 194 */ 195 if (argc > 1) 196 argv[1] = kludge_oldps_options(PS_ARGS, argv[1], argv[2]); 197 198 all = dropgid = _fmt = nselectors = optfatal = 0; 199 prtheader = showthreads = wflag = xkeep_implied = 0; 200 xkeep = -1; /* Neither -x nor -X. */ 201 init_list(&gidlist, addelem_gid, sizeof(gid_t), "group"); 202 init_list(&pgrplist, addelem_pid, sizeof(pid_t), "process group"); 203 init_list(&pidlist, addelem_pid, sizeof(pid_t), "process id"); 204 init_list(&ruidlist, addelem_uid, sizeof(uid_t), "ruser"); 205 init_list(&sesslist, addelem_pid, sizeof(pid_t), "session id"); 206 init_list(&ttylist, addelem_tty, sizeof(dev_t), "tty"); 207 init_list(&uidlist, addelem_uid, sizeof(uid_t), "user"); 208 memf = nlistf = _PATH_DEVNULL; 209 while ((ch = getopt(argc, argv, PS_ARGS)) != -1) 210 switch((char)ch) { 211 case 'A': 212 /* 213 * Exactly the same as `-ax'. This has been 214 * added for compatability with SUSv3, but for 215 * now it will not be described in the man page. 216 */ 217 nselectors++; 218 all = xkeep = 1; 219 break; 220 case 'a': 221 nselectors++; 222 all = 1; 223 break; 224 case 'C': 225 rawcpu = 1; 226 break; 227 case 'c': 228 cflag = 1; 229 break; 230 case 'e': /* XXX set ufmt */ 231 needenv = 1; 232 break; 233#ifdef LAZY_PS 234 case 'f': 235 if (getuid() == 0 || getgid() == 0) 236 forceuread = 1; 237 break; 238#endif 239 case 'G': 240 add_list(&gidlist, optarg); 241 xkeep_implied = 1; 242 nselectors++; 243 break; 244 case 'g': 245#if 0 246 /*- 247 * XXX - This SUSv3 behavior is still under debate 248 * since it conflicts with the (undocumented) 249 * `-g' option. So we skip it for now. 250 */ 251 add_list(&pgrplist, optarg); 252 xkeep_implied = 1; 253 nselectors++; 254 break; 255#else 256 /* The historical BSD-ish (from SunOS) behavior. */ 257 break; /* no-op */ 258#endif 259 case 'H': 260 showthreads = KERN_PROC_INC_THREAD; 261 break; 262 case 'h': 263 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 264 break; 265 case 'j': 266 parsefmt(jfmt, 0); 267 _fmt = 1; 268 jfmt[0] = '\0'; 269 break; 270 case 'L': 271 showkey(); 272 exit(0); 273 case 'l': 274 parsefmt(lfmt, 0); 275 _fmt = 1; 276 lfmt[0] = '\0'; 277 break; 278 case 'M': 279 memf = optarg; 280 dropgid = 1; 281 break; 282 case 'm': 283 sortby = SORTMEM; 284 break; 285 case 'N': 286 nlistf = optarg; 287 dropgid = 1; 288 break; 289 case 'O': 290 parsefmt(o1, 1); 291 parsefmt(optarg, 1); 292 parsefmt(o2, 1); 293 o1[0] = o2[0] = '\0'; 294 _fmt = 1; 295 break; 296 case 'o': 297 parsefmt(optarg, 1); 298 _fmt = 1; 299 break; 300 case 'p': 301 add_list(&pidlist, optarg); 302 /* 303 * Note: `-p' does not *set* xkeep, but any values 304 * from pidlist are checked before xkeep is. That 305 * way they are always matched, even if the user 306 * specifies `-X'. 307 */ 308 nselectors++; 309 break; 310#if 0 311 case 'R': 312 /*- 313 * XXX - This un-standard option is still under 314 * debate. This is what SUSv3 defines as 315 * the `-U' option, and while it would be 316 * nice to have, it could cause even more 317 * confusion to implement it as `-R'. 318 */ 319 add_list(&ruidlist, optarg); 320 xkeep_implied = 1; 321 nselectors++; 322 break; 323#endif 324 case 'r': 325 sortby = SORTCPU; 326 break; 327 case 'S': 328 sumrusage = 1; 329 break; 330#if 0 331 case 's': 332 /*- 333 * XXX - This non-standard option is still under 334 * debate. This *is* supported on Solaris, 335 * Linux, and IRIX, but conflicts with `-s' 336 * on NetBSD and maybe some older BSD's. 337 */ 338 add_list(&sesslist, optarg); 339 xkeep_implied = 1; 340 nselectors++; 341 break; 342#endif 343 case 'T': 344 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 345 errx(1, "stdin: not a terminal"); 346 /* FALLTHROUGH */ 347 case 't': 348 add_list(&ttylist, optarg); 349 xkeep_implied = 1; 350 nselectors++; 351 break; 352 case 'U': 353 /* This is what SUSv3 defines as the `-u' option. */ 354 add_list(&uidlist, optarg); 355 xkeep_implied = 1; 356 nselectors++; 357 break; 358 case 'u': 359 parsefmt(ufmt, 0); 360 sortby = SORTCPU; 361 _fmt = 1; 362 ufmt[0] = '\0'; 363 break; 364 case 'v': 365 parsefmt(vfmt, 0); 366 sortby = SORTMEM; 367 _fmt = 1; 368 vfmt[0] = '\0'; 369 break; 370 case 'w': 371 if (wflag) 372 termwidth = UNLIMITED; 373 else if (termwidth < 131) 374 termwidth = 131; 375 wflag++; 376 break; 377 case 'X': 378 /* 379 * Note that `-X' and `-x' are not standard "selector" 380 * options. For most selector-options, we check *all* 381 * processes to see if any are matched by the given 382 * value(s). After we have a set of all the matched 383 * processes, then `-X' and `-x' govern whether we 384 * modify that *matched* set for processes which do 385 * not have a controlling terminal. `-X' causes 386 * those processes to be deleted from the matched 387 * set, while `-x' causes them to be kept. 388 */ 389 xkeep = 0; 390 break; 391 case 'x': 392 xkeep = 1; 393 break; 394 case 'Z': 395 parsefmt(Zfmt, 0); 396 Zfmt[0] = '\0'; 397 break; 398 case '?': 399 default: 400 usage(); 401 } 402 argc -= optind; 403 argv += optind; 404 405 /* 406 * If there arguments after processing all the options, attempt 407 * to treat them as a list of process ids. 408 */ 409 while (*argv) { 410 if (!isdigitch(**argv)) 411 break; 412 add_list(&pidlist, *argv); 413 argv++; 414 } 415 if (*argv) { 416 fprintf(stderr, "%s: illegal argument: %s\n", 417 getprogname(), *argv); 418 usage(); 419 } 420 if (optfatal) 421 exit(1); /* Error messages already printed. */ 422 if (xkeep < 0) /* Neither -X nor -x was specified. */ 423 xkeep = xkeep_implied; 424 425 426 /* 427 * Discard setgid privileges if not the running kernel so that bad 428 * guys can't print interesting stuff from kernel memory. 429 */ 430 if (dropgid) { 431 setgid(getgid()); 432 setuid(getuid()); 433 } 434 435 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 436 if (kd == 0) 437 errx(1, "%s", errbuf); 438 439 if (!_fmt) 440 parsefmt(dfmt, 0); 441 442 if (nselectors == 0) { 443 uidlist.l.ptr = malloc(sizeof(uid_t)); 444 if (uidlist.l.ptr == NULL) 445 errx(1, "malloc failed"); 446 nselectors = 1; 447 uidlist.count = uidlist.maxcount = 1; 448 *uidlist.l.uids = getuid(); 449 } 450 451 /* 452 * scan requested variables, noting what structures are needed, 453 * and adjusting header widths as appropriate. 454 */ 455 scanvars(); 456 457 /* 458 * Get process list. If the user requested just one selector- 459 * option, then kvm_getprocs can be asked to return just those 460 * processes. Otherwise, have it return all processes, and 461 * then this routine will search that full list and select the 462 * processes which match any of the user's selector-options. 463 */ 464 what = showthreads != 0 ? KERN_PROC_ALL : KERN_PROC_PROC; 465 flag = 0; 466 if (nselectors == 1) { 467 if (gidlist.count == 1) { 468 what = KERN_PROC_RGID | showthreads; 469 flag = *gidlist.l.gids; 470 nselectors = 0; 471 } else if (pgrplist.count == 1) { 472 what = KERN_PROC_PGRP | showthreads; 473 flag = *pgrplist.l.pids; 474 nselectors = 0; 475 } else if (pidlist.count == 1) { 476 what = KERN_PROC_PID | showthreads; 477 flag = *pidlist.l.pids; 478 nselectors = 0; 479 } else if (ruidlist.count == 1) { 480 what = KERN_PROC_RUID | showthreads; 481 flag = *ruidlist.l.uids; 482 nselectors = 0; 483 } else if (sesslist.count == 1) { 484 what = KERN_PROC_SESSION | showthreads; 485 flag = *sesslist.l.pids; 486 nselectors = 0; 487 } else if (ttylist.count == 1) { 488 what = KERN_PROC_TTY | showthreads; 489 flag = *ttylist.l.ttys; 490 nselectors = 0; 491 } else if (uidlist.count == 1) { 492 what = KERN_PROC_UID | showthreads; 493 flag = *uidlist.l.uids; 494 nselectors = 0; 495 } else if (all) { 496 /* No need for this routine to select processes. */ 497 nselectors = 0; 498 } 499 } 500 501 /* 502 * select procs 503 */ 504 nentries = -1; 505 kp = kvm_getprocs(kd, what, flag, &nentries); 506 if ((kp == NULL && nentries > 0) || (kp != NULL && nentries < 0)) 507 errx(1, "%s", kvm_geterr(kd)); 508 nkept = 0; 509 if (nentries > 0) { 510 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 511 errx(1, "malloc failed"); 512 for (i = nentries; --i >= 0; ++kp) { 513 /* 514 * If the user specified multiple selection-criteria, 515 * then keep any process matched by the inclusive OR 516 * of all the selection-criteria given. 517 */ 518 if (pidlist.count > 0) { 519 for (elem = 0; elem < pidlist.count; elem++) 520 if (kp->ki_pid == pidlist.l.pids[elem]) 521 goto keepit; 522 } 523 /* 524 * Note that we had to process pidlist before 525 * filtering out processes which do not have 526 * a controlling terminal. 527 */ 528 if (xkeep == 0) { 529 if ((kp->ki_tdev == NODEV || 530 (kp->ki_flag & P_CONTROLT) == 0)) 531 continue; 532 } 533 if (nselectors == 0) 534 goto keepit; 535 if (gidlist.count > 0) { 536 for (elem = 0; elem < gidlist.count; elem++) 537 if (kp->ki_rgid == gidlist.l.gids[elem]) 538 goto keepit; 539 } 540 if (pgrplist.count > 0) { 541 for (elem = 0; elem < pgrplist.count; elem++) 542 if (kp->ki_pgid == 543 pgrplist.l.pids[elem]) 544 goto keepit; 545 } 546 if (ruidlist.count > 0) { 547 for (elem = 0; elem < ruidlist.count; elem++) 548 if (kp->ki_ruid == 549 ruidlist.l.uids[elem]) 550 goto keepit; 551 } 552 if (sesslist.count > 0) { 553 for (elem = 0; elem < sesslist.count; elem++) 554 if (kp->ki_sid == sesslist.l.pids[elem]) 555 goto keepit; 556 } 557 if (ttylist.count > 0) { 558 for (elem = 0; elem < ttylist.count; elem++) 559 if (kp->ki_tdev == ttylist.l.ttys[elem]) 560 goto keepit; 561 } 562 if (uidlist.count > 0) { 563 for (elem = 0; elem < uidlist.count; elem++) 564 if (kp->ki_uid == uidlist.l.uids[elem]) 565 goto keepit; 566 } 567 /* 568 * This process did not match any of the user's 569 * selector-options, so skip the process. 570 */ 571 continue; 572 573 keepit: 574 kinfo[nkept].ki_p = kp; 575 if (needuser) 576 saveuser(&kinfo[nkept]); 577 dynsizevars(&kinfo[nkept]); 578 nkept++; 579 } 580 } 581 582 sizevars(); 583 584 /* 585 * print header 586 */ 587 printheader(); 588 if (nkept == 0) 589 exit(1); 590 591 /* 592 * sort proc list 593 */ 594 qsort(kinfo, nkept, sizeof(KINFO), pscomp); 595 /* 596 * For each process, call each variable output function. 597 */ 598 for (i = lineno = 0; i < nkept; i++) { 599 for (vent = vhead; vent; vent = vent->next) { 600 (vent->var->oproc)(&kinfo[i], vent); 601 if (vent->next != NULL) 602 (void)putchar(' '); 603 } 604 (void)putchar('\n'); 605 if (prtheader && lineno++ == prtheader - 4) { 606 (void)putchar('\n'); 607 printheader(); 608 lineno = 0; 609 } 610 } 611 free_list(&gidlist); 612 free_list(&pidlist); 613 free_list(&pgrplist); 614 free_list(&ruidlist); 615 free_list(&sesslist); 616 free_list(&ttylist); 617 free_list(&uidlist); 618 619 exit(eval); 620} 621 622static int 623addelem_gid(struct listinfo *inf, const char *elem) 624{ 625 struct group *grp; 626 const char *nameorID; 627 char *endp; 628 u_long bigtemp; 629 630 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 631 if (*elem == '\0') 632 warnx("Invalid (zero-length) %s name", inf->lname); 633 else 634 warnx("%s name too long: %s", inf->lname, elem); 635 optfatal = 1; 636 return (0); /* Do not add this value. */ 637 } 638 639 /* 640 * SUSv3 states that `ps -G grouplist' should match "real-group 641 * ID numbers", and does not mention group-names. I do want to 642 * also support group-names, so this tries for a group-id first, 643 * and only tries for a name if that doesn't work. This is the 644 * opposite order of what is done in addelem_uid(), but in 645 * practice the order would only matter for group-names which 646 * are all-numeric. 647 */ 648 grp = NULL; 649 nameorID = "named"; 650 errno = 0; 651 bigtemp = strtoul(elem, &endp, 10); 652 if (errno == 0 && *endp == '\0' && bigtemp <= GID_MAX) { 653 nameorID = "name or ID matches"; 654 grp = getgrgid((gid_t)bigtemp); 655 } 656 if (grp == NULL) 657 grp = getgrnam(elem); 658 if (grp == NULL) { 659 warnx("No %s %s '%s'", inf->lname, nameorID, elem); 660 optfatal = 1; 661 return (0); /* Do not add this value. */ 662 } 663 664 if (inf->count >= inf->maxcount) 665 expand_list(inf); 666 inf->l.gids[(inf->count)++] = grp->gr_gid; 667 return (1); 668} 669 670#define BSD_PID_MAX 99999 /* Copy of PID_MAX from sys/proc.h. */ 671static int 672addelem_pid(struct listinfo *inf, const char *elem) 673{ 674 char *endp; 675 long tempid; 676 677 if (*elem == '\0') 678 tempid = 0L; 679 else { 680 errno = 0; 681 tempid = strtol(elem, &endp, 10); 682 if (*endp != '\0' || tempid < 0 || elem == endp) { 683 warnx("Invalid %s: %s", inf->lname, elem); 684 errno = ERANGE; 685 } else if (errno != 0 || tempid > BSD_PID_MAX) { 686 warnx("%s too large: %s", inf->lname, elem); 687 errno = ERANGE; 688 } 689 if (errno == ERANGE) { 690 optfatal = 1; 691 return (0); /* Do not add this value. */ 692 } 693 } 694 695 if (inf->count >= inf->maxcount) 696 expand_list(inf); 697 inf->l.pids[(inf->count)++] = tempid; 698 return (1); 699} 700#undef BSD_PID_MAX 701 702static int 703addelem_tty(struct listinfo *inf, const char *elem) 704{ 705 const char *ttypath; 706 struct stat sb; 707 char pathbuf[PATH_MAX]; 708 709 if (strcmp(elem, "co") == 0) 710 ttypath = strdup(_PATH_CONSOLE); 711 else if (*elem == '/') 712 ttypath = elem; 713 else { 714 strlcpy(pathbuf, _PATH_TTY, sizeof(pathbuf)); 715 strlcat(pathbuf, elem, sizeof(pathbuf)); 716 ttypath = pathbuf; 717 } 718 719 if (stat(ttypath, &sb) == -1) { 720 warn("%s", ttypath); 721 optfatal = 1; 722 return (0); /* Do not add this value. */ 723 } 724 if (!S_ISCHR(sb.st_mode)) { 725 warn("%s: Not a terminal", ttypath); 726 optfatal = 1; 727 return (0); /* Do not add this value. */ 728 } 729 730 if (inf->count >= inf->maxcount) 731 expand_list(inf); 732 inf->l.ttys[(inf->count)++] = sb.st_rdev; 733 return (1); 734} 735 736static int 737addelem_uid(struct listinfo *inf, const char *elem) 738{ 739 struct passwd *pwd; 740 char *endp; 741 u_long bigtemp; 742 743 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 744 if (*elem == '\0') 745 warnx("Invalid (zero-length) %s name", inf->lname); 746 else 747 warnx("%s name too long: %s", inf->lname, elem); 748 optfatal = 1; 749 return (0); /* Do not add this value. */ 750 } 751 752 pwd = getpwnam(elem); 753 if (pwd == NULL) { 754 errno = 0; 755 bigtemp = strtoul(elem, &endp, 10); 756 if (errno != 0 || *endp != '\0' || bigtemp > UID_MAX) 757 warnx("No %s named '%s'", inf->lname, elem); 758 else { 759 /* The string is all digits, so it might be a userID. */ 760 pwd = getpwuid((uid_t)bigtemp); 761 if (pwd == NULL) 762 warnx("No %s name or ID matches '%s'", 763 inf->lname, elem); 764 } 765 } 766 if (pwd == NULL) { 767 /* 768 * These used to be treated as minor warnings (and the 769 * option was simply ignored), but now they are fatal 770 * errors (and the command will be aborted). 771 */ 772 optfatal = 1; 773 return (0); /* Do not add this value. */ 774 } 775 776 if (inf->count >= inf->maxcount) 777 expand_list(inf); 778 inf->l.uids[(inf->count)++] = pwd->pw_uid; 779 return (1); 780} 781 782static void 783add_list(struct listinfo *inf, const char *argp) 784{ 785 const char *savep; 786 char *cp, *endp; 787 int toolong; 788 char elemcopy[PATH_MAX]; 789 790 while (*argp != '\0') { 791 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 792 argp++; 793 savep = argp; 794 toolong = 0; 795 cp = elemcopy; 796 if (strchr(T_SEP, *argp) == NULL) { 797 endp = elemcopy + sizeof(elemcopy) - 1; 798 while (*argp != '\0' && cp <= endp && 799 strchr(W_SEP T_SEP, *argp) == NULL) 800 *cp++ = *argp++; 801 if (cp > endp) 802 toolong = 1; 803 } 804 if (!toolong) { 805 *cp = '\0'; 806#ifndef ADD_PS_LISTRESET 807 /* 808 * This is how the standard expects lists to 809 * be handled. 810 */ 811 inf->addelem(inf, elemcopy); 812#else 813 /*- 814 * This would add a simple non-standard-but-convienent 815 * feature. 816 * 817 * XXX - The first time I tried to add this check, 818 * it increased the total size of `ps' by 3940 819 * bytes on i386! That's 12% of the entire 820 * program! The `ps.o' file grew by only about 821 * 40 bytes, but the final (stripped) executable 822 * in /bin/ps grew by 12%. I have not had time 823 * to investigate, so skip the feature for now. 824 */ 825 /* 826 * We now have a single element. Add it to the 827 * list, unless the element is ":". In that case, 828 * reset the list so previous entries are ignored. 829 */ 830 if (strcmp(elemcopy, ":") == 0) 831 inf->count = 0; 832 else 833 inf->addelem(inf, elemcopy); 834#endif 835 } else { 836 /* 837 * The string is too long to copy. Find the end 838 * of the string to print out the warning message. 839 */ 840 while (*argp != '\0' && strchr(W_SEP T_SEP, 841 *argp) == NULL) 842 argp++; 843 warnx("Value too long: %.*s", (int)(argp - savep), 844 savep); 845 optfatal = 1; 846 } 847 /* 848 * Skip over any number of trailing whitespace characters, 849 * but only one (at most) trailing element-terminating 850 * character. 851 */ 852 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 853 argp++; 854 if (*argp != '\0' && strchr(T_SEP, *argp) != NULL) { 855 argp++; 856 /* Catch case where string ended with a comma. */ 857 if (*argp == '\0') 858 inf->addelem(inf, argp); 859 } 860 } 861} 862 863static void * 864expand_list(struct listinfo *inf) 865{ 866 void *newlist; 867 int newmax; 868 869 newmax = (inf->maxcount + 1) << 1; 870 newlist = realloc(inf->l.ptr, newmax * inf->elemsize); 871 if (newlist == NULL) { 872 free(inf->l.ptr); 873 errx(1, "realloc to %d %ss failed", newmax, 874 inf->lname); 875 } 876 inf->maxcount = newmax; 877 inf->l.ptr = newlist; 878 879 return (newlist); 880} 881 882static void 883free_list(struct listinfo *inf) 884{ 885 886 inf->count = inf->elemsize = inf->maxcount = 0; 887 if (inf->l.ptr != NULL) 888 free(inf->l.ptr); 889 inf->addelem = NULL; 890 inf->lname = NULL; 891 inf->l.ptr = NULL; 892} 893 894static void 895init_list(struct listinfo *inf, addelem_rtn artn, int elemsize, 896 const char *lname) 897{ 898 899 inf->count = inf->maxcount = 0; 900 inf->elemsize = elemsize; 901 inf->addelem = artn; 902 inf->lname = lname; 903 inf->l.ptr = NULL; 904} 905 906VARENT * 907find_varentry(VAR *v) 908{ 909 struct varent *vent; 910 911 for (vent = vhead; vent; vent = vent->next) { 912 if (strcmp(vent->var->name, v->name) == 0) 913 return vent; 914 } 915 return NULL; 916} 917 918static void 919scanvars(void) 920{ 921 struct varent *vent; 922 VAR *v; 923 924 for (vent = vhead; vent; vent = vent->next) { 925 v = vent->var; 926 if (v->flag & DSIZ) { 927 v->dwidth = v->width; 928 v->width = 0; 929 } 930 if (v->flag & USER) 931 needuser = 1; 932 if (v->flag & COMM) 933 needcomm = 1; 934 } 935} 936 937static void 938dynsizevars(KINFO *ki) 939{ 940 struct varent *vent; 941 VAR *v; 942 int i; 943 944 for (vent = vhead; vent; vent = vent->next) { 945 v = vent->var; 946 if (!(v->flag & DSIZ)) 947 continue; 948 i = (v->sproc)( ki); 949 if (v->width < i) 950 v->width = i; 951 if (v->width > v->dwidth) 952 v->width = v->dwidth; 953 } 954} 955 956static void 957sizevars(void) 958{ 959 struct varent *vent; 960 VAR *v; 961 int i; 962 963 for (vent = vhead; vent; vent = vent->next) { 964 v = vent->var; 965 i = strlen(vent->header); 966 if (v->width < i) 967 v->width = i; 968 totwidth += v->width + 1; /* +1 for space */ 969 } 970 totwidth--; 971} 972 973static const char * 974fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki, 975 char *comm, int maxlen) 976{ 977 const char *s; 978 979 s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen); 980 return (s); 981} 982 983#define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM)) 984 985static void 986saveuser(KINFO *ki) 987{ 988 989 if (ki->ki_p->ki_sflag & PS_INMEM) { 990 /* 991 * The u-area might be swapped out, and we can't get 992 * at it because we have a crashdump and no swap. 993 * If it's here fill in these fields, otherwise, just 994 * leave them 0. 995 */ 996 ki->ki_valid = 1; 997 } else 998 ki->ki_valid = 0; 999 /* 1000 * save arguments if needed 1001 */ 1002 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 1003 ki->ki_args = strdup(fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 1004 MAXCOMLEN)); 1005 } else if (needcomm) { 1006 asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm); 1007 } else { 1008 ki->ki_args = NULL; 1009 } 1010 if (needenv && UREADOK(ki)) { 1011 ki->ki_env = strdup(fmt(kvm_getenvv, ki, (char *)NULL, 0)); 1012 } else if (needenv) { 1013 ki->ki_env = malloc(3); 1014 strcpy(ki->ki_env, "()"); 1015 } else { 1016 ki->ki_env = NULL; 1017 } 1018} 1019 1020static int 1021pscomp(const void *a, const void *b) 1022{ 1023 const KINFO *ka, *kb; 1024 double cpua, cpub; 1025 segsz_t sizea, sizeb; 1026 1027 ka = a; 1028 kb = b; 1029 /* SORTCPU and SORTMEM are sorted in descending order. */ 1030 if (sortby == SORTCPU) { 1031 cpua = getpcpu(ka); 1032 cpub = getpcpu(kb); 1033 if (cpua < cpub) 1034 return (1); 1035 if (cpua > cpub) 1036 return (-1); 1037 } 1038 if (sortby == SORTMEM) { 1039 sizea = ka->ki_p->ki_tsize + ka->ki_p->ki_dsize + 1040 ka->ki_p->ki_ssize; 1041 sizeb = kb->ki_p->ki_tsize + kb->ki_p->ki_dsize + 1042 kb->ki_p->ki_ssize; 1043 if (sizea < sizeb) 1044 return (1); 1045 if (sizea > sizeb) 1046 return (-1); 1047 } 1048 /* 1049 * TTY's are sorted in ascending order, except that all NODEV 1050 * processes come before all processes with a device. 1051 */ 1052 if (ka->ki_p->ki_tdev == NODEV && kb->ki_p->ki_tdev != NODEV) 1053 return (-1); 1054 if (ka->ki_p->ki_tdev != NODEV && kb->ki_p->ki_tdev == NODEV) 1055 return (1); 1056 if (ka->ki_p->ki_tdev < kb->ki_p->ki_tdev) 1057 return (-1); 1058 if (ka->ki_p->ki_tdev > kb->ki_p->ki_tdev) 1059 return (1); 1060 /* PID's are sorted in ascending order. */ 1061 if (ka->ki_p->ki_pid < kb->ki_p->ki_pid) 1062 return (-1); 1063 if (ka->ki_p->ki_pid > kb->ki_p->ki_pid) 1064 return (1); 1065 return (0); 1066} 1067 1068/* 1069 * ICK (all for getopt), would rather hide the ugliness 1070 * here than taint the main code. 1071 * 1072 * ps foo -> ps -foo 1073 * ps 34 -> ps -p34 1074 * 1075 * The old convention that 't' with no trailing tty arg means the users 1076 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 1077 * feature is available with the option 'T', which takes no argument. 1078 */ 1079static char * 1080kludge_oldps_options(const char *optlist, char *origval, const char *nextarg) 1081{ 1082 size_t len; 1083 char *argp, *cp, *newopts, *ns, *optp, *pidp; 1084 1085 /* 1086 * See if the original value includes any option which takes an 1087 * argument (and will thus use up the remainder of the string). 1088 */ 1089 argp = NULL; 1090 if (optlist != NULL) { 1091 for (cp = origval; *cp != '\0'; cp++) { 1092 optp = strchr(optlist, *cp); 1093 if ((optp != NULL) && *(optp + 1) == ':') { 1094 argp = cp; 1095 break; 1096 } 1097 } 1098 } 1099 if (argp != NULL && *origval == '-') 1100 return (origval); 1101 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 earlier 1108 * in the option string (including a possible `t' flag), then the 1109 * remainder of the string must be the argument to that flag; so 1110 * do not modify that argument. Note that a trailing `t' would 1111 * cause argp to be set, if argp was not already set by some 1112 * earlier option. 1113 */ 1114 len = strlen(origval); 1115 cp = origval + len - 1; 1116 pidp = NULL; 1117 if (*cp == 't' && *origval != '-' && cp == argp) { 1118 if (nextarg == NULL || *nextarg == '-' || isdigitch(*nextarg)) 1119 *cp = 'T'; 1120 } else if (argp == NULL) { 1121 /* 1122 * The original value did not include any option which takes 1123 * an argument (and that would include `p' and `t'), so check 1124 * the value for trailing number, or comma-separated list of 1125 * numbers, which we will treat as a pid request. 1126 */ 1127 if (isdigitch(*cp)) { 1128 while (cp >= origval && (*cp == ',' || isdigitch(*cp))) 1129 --cp; 1130 pidp = cp + 1; 1131 } 1132 } 1133 1134 /* 1135 * If nothing needs to be added to the string, then return 1136 * the "original" (although possibly modified) value. 1137 */ 1138 if (*origval == '-' && pidp == NULL) 1139 return (origval); 1140 1141 /* 1142 * Create a copy of the string to add '-' and/or 'p' to the 1143 * original value. 1144 */ 1145 if ((newopts = ns = malloc(len + 3)) == NULL) 1146 errx(1, "malloc failed"); 1147 1148 if (*origval != '-') 1149 *ns++ = '-'; /* add option flag */ 1150 1151 if (pidp == NULL) 1152 strcpy(ns, origval); 1153 else { 1154 /* 1155 * Copy everything before the pid string, add the `p', 1156 * and then copy the pid string. 1157 */ 1158 len = pidp - origval; 1159 memcpy(ns, origval, len); 1160 ns += len; 1161 *ns++ = 'p'; 1162 strcpy(ns, pidp); 1163 } 1164 1165 return (newopts); 1166} 1167 1168static void 1169usage(void) 1170{ 1171#define SINGLE_OPTS "[-aC" OPT_LAZY_f "HhjlmrSTuvwXxZ]" 1172 1173 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 1174 "usage: ps " SINGLE_OPTS " [-G gid[,gid]] [-O|o fmt]", 1175 " [-p pid[,pid]] [-t tty[,tty]] [-U user[,user]]", 1176 " [-M core] [-N system]", 1177 " ps [-L]"); 1178 exit(1); 1179} 1180