ps.c revision 127596
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 127596 2004-03-30 01:45:23Z gad $"); 55 56#include <sys/param.h> 57#include <sys/proc.h> 58#include <sys/user.h> 59#include <sys/stat.h> 60#include <sys/ioctl.h> 61#include <sys/sysctl.h> 62 63#include <ctype.h> 64#include <err.h> 65#include <errno.h> 66#include <fcntl.h> 67#include <grp.h> 68#include <kvm.h> 69#include <limits.h> 70#include <locale.h> 71#include <paths.h> 72#include <pwd.h> 73#include <stdint.h> 74#include <stdio.h> 75#include <stdlib.h> 76#include <string.h> 77#include <unistd.h> 78 79#include "ps.h" 80 81#define W_SEP " \t" /* "Whitespace" list separators */ 82#define T_SEP "," /* "Terminate-element" list separators */ 83 84#ifdef LAZY_PS 85#define DEF_UREAD 0 86#define OPT_LAZY_f "f" 87#else 88#define DEF_UREAD 1 /* Always do the more-expensive read. */ 89#define OPT_LAZY_f /* I.e., the `-f' option is not added. */ 90#endif 91 92int cflag; /* -c */ 93int eval; /* Exit value */ 94time_t now; /* Current time(3) value */ 95int rawcpu; /* -C */ 96int sumrusage; /* -S */ 97int termwidth; /* Width of the screen (0 == infinity). */ 98int totwidth; /* Calculated-width of requested variables. */ 99 100struct varent *vhead; 101 102static int forceuread = DEF_UREAD; /* Do extra work to get u-area. */ 103static kvm_t *kd; 104static KINFO *kinfo; 105static int needcomm; /* -o "command" */ 106static int needenv; /* -e */ 107static int needuser; /* -o "user" */ 108static int optfatal; /* Fatal error parsing some list-option. */ 109 110static enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 111 112struct listinfo; 113typedef int addelem_rtn(struct listinfo *_inf, const char *_elem); 114 115struct listinfo { 116 int count; 117 int maxcount; 118 int elemsize; 119 addelem_rtn *addelem; 120 const char *lname; 121 union { 122 gid_t *gids; 123 pid_t *pids; 124 dev_t *ttys; 125 uid_t *uids; 126 void *ptr; 127 }; 128}; 129 130static int addelem_gid(struct listinfo *, const char *); 131static int addelem_pid(struct listinfo *, const char *); 132static int addelem_tty(struct listinfo *, const char *); 133static int addelem_uid(struct listinfo *, const char *); 134static void add_list(struct listinfo *, const char *); 135static void dynsizevars(KINFO *); 136static void *expand_list(struct listinfo *); 137static const char *fmt(char **(*)(kvm_t *, const struct kinfo_proc *, int), 138 KINFO *, char *, int); 139static void free_list(struct listinfo *); 140static void init_list(struct listinfo *, addelem_rtn, int, const char *); 141static char *kludge_oldps_options(char *); 142static int pscomp(const void *, const void *); 143static void saveuser(KINFO *); 144static void scanvars(void); 145static void sizevars(void); 146static void usage(void); 147 148static char dfmt[] = "pid,tt,state,time,command"; 149static char jfmt[] = "user,pid,ppid,pgid,jobc,state,tt,time,command"; 150static char lfmt[] = "uid,pid,ppid,cpu,pri,nice,vsz,rss,mwchan,state," 151 "tt,time,command"; 152static char o1[] = "pid"; 153static char o2[] = "tt,state,time,command"; 154static char ufmt[] = "user,pid,%cpu,%mem,vsz,rss,tt,state,start,time,command"; 155static char vfmt[] = "pid,state,time,sl,re,pagein,vsz,rss,lim,tsiz," 156 "%cpu,%mem,command"; 157static char Zfmt[] = "label"; 158 159#define PS_ARGS "AaCc" OPT_LAZY_f "G:gHhjLlM:mN:O:o:p:rSTt:U:uvwXxZ" 160 161int 162main(int argc, char *argv[]) 163{ 164 struct listinfo gidlist, pgrplist, pidlist; 165 struct listinfo ruidlist, sesslist, ttylist, uidlist; 166 struct kinfo_proc *kp; 167 struct varent *vent; 168 struct winsize ws; 169 const char *cp, *nlistf, *memf; 170 char *cols; 171 int all, ch, dropgid, elem, flag, _fmt, i, lineno; 172 int nentries, nocludge, nkept, nselectors; 173 int prtheader, showthreads, wflag, what, xkeep, xkeep_implied; 174 char errbuf[_POSIX2_LINE_MAX]; 175 176 (void) setlocale(LC_ALL, ""); 177 time(&now); /* Used by routines in print.c. */ 178 179 if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0') 180 termwidth = atoi(cols); 181 else if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 182 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 183 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 184 ws.ws_col == 0) 185 termwidth = 79; 186 else 187 termwidth = ws.ws_col - 1; 188 189 /* 190 * Don't apply a kludge if the first argument is an option taking an 191 * argument 192 */ 193 if (argc > 1) { 194 nocludge = 0; 195 if (argv[1][0] == '-') { 196 for (cp = PS_ARGS; *cp != '\0'; cp++) { 197 if (*cp != ':') 198 continue; 199 if (*(cp - 1) == argv[1][1]) { 200 nocludge = 1; 201 break; 202 } 203 } 204 } 205 if (nocludge == 0) 206 argv[1] = kludge_oldps_options(argv[1]); 207 } 208 209 all = dropgid = _fmt = nselectors = optfatal = 0; 210 prtheader = showthreads = wflag = xkeep_implied = 0; 211 xkeep = -1; /* Neither -x nor -X. */ 212 init_list(&gidlist, addelem_gid, sizeof(gid_t), "group"); 213 init_list(&pgrplist, addelem_pid, sizeof(pid_t), "process group"); 214 init_list(&pidlist, addelem_pid, sizeof(pid_t), "process id"); 215 init_list(&ruidlist, addelem_uid, sizeof(uid_t), "ruser"); 216 init_list(&sesslist, addelem_pid, sizeof(pid_t), "session id"); 217 init_list(&ttylist, addelem_tty, sizeof(dev_t), "tty"); 218 init_list(&uidlist, addelem_uid, sizeof(uid_t), "user"); 219 memf = nlistf = _PATH_DEVNULL; 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 case 'g': 256#if 0 257 /* 258 * XXX - This SUSv3 behavior is still under debate 259 * since it conflicts with the (undocumented) 260 * `-g' option. So we skip it for now. 261 */ 262 add_list(&pgrplist, optarg); 263 xkeep_implied = 1; 264 nselectors++; 265 break; 266#else 267 /* The historical BSD-ish (from SunOS) behavior. */ 268 break; /* no-op */ 269#endif 270 case 'H': 271 showthreads = KERN_PROC_INC_THREAD; 272 break; 273 case 'h': 274 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 275 break; 276 case 'j': 277 parsefmt(jfmt, 0); 278 _fmt = 1; 279 jfmt[0] = '\0'; 280 break; 281 case 'L': 282 showkey(); 283 exit(0); 284 case 'l': 285 parsefmt(lfmt, 0); 286 _fmt = 1; 287 lfmt[0] = '\0'; 288 break; 289 case 'M': 290 memf = optarg; 291 dropgid = 1; 292 break; 293 case 'm': 294 sortby = SORTMEM; 295 break; 296 case 'N': 297 nlistf = optarg; 298 dropgid = 1; 299 break; 300 case 'O': 301 parsefmt(o1, 1); 302 parsefmt(optarg, 1); 303 parsefmt(o2, 1); 304 o1[0] = o2[0] = '\0'; 305 _fmt = 1; 306 break; 307 case 'o': 308 parsefmt(optarg, 1); 309 _fmt = 1; 310 break; 311 case 'p': 312 add_list(&pidlist, optarg); 313 /* 314 * Note: `-p' does not *set* xkeep, but any values 315 * from pidlist are checked before xkeep is. That 316 * way they are always matched, even if the user 317 * specifies `-X'. 318 */ 319 nselectors++; 320 break; 321#if 0 322 case 'R': 323 /* 324 * XXX - This un-standard option is still under 325 * debate. This is what SUSv3 defines as 326 * the `-U' option, and while it would be 327 * nice to have, it could cause even more 328 * confusion to implement it as `-R'. 329 */ 330 add_list(&ruidlist, optarg); 331 xkeep_implied = 1; 332 nselectors++; 333 break; 334#endif 335 case 'r': 336 sortby = SORTCPU; 337 break; 338 case 'S': 339 sumrusage = 1; 340 break; 341#if 0 342 case 's': 343 /* 344 * XXX - This non-standard option is still under 345 * debate. This *is* supported on Solaris, 346 * Linux, and IRIX, but conflicts with `-s' 347 * on NetBSD and maybe some older BSD's. 348 */ 349 add_list(&sesslist, optarg); 350 xkeep_implied = 1; 351 nselectors++; 352 break; 353#endif 354 case 'T': 355 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 356 errx(1, "stdin: not a terminal"); 357 /* FALLTHROUGH */ 358 case 't': 359 add_list(&ttylist, optarg); 360 xkeep_implied = 1; 361 nselectors++; 362 break; 363 case 'U': 364 /* This is what SUSv3 defines as the `-u' option. */ 365 add_list(&uidlist, optarg); 366 xkeep_implied = 1; 367 nselectors++; 368 break; 369 case 'u': 370 parsefmt(ufmt, 0); 371 sortby = SORTCPU; 372 _fmt = 1; 373 ufmt[0] = '\0'; 374 break; 375 case 'v': 376 parsefmt(vfmt, 0); 377 sortby = SORTMEM; 378 _fmt = 1; 379 vfmt[0] = '\0'; 380 break; 381 case 'w': 382 if (wflag) 383 termwidth = UNLIMITED; 384 else if (termwidth < 131) 385 termwidth = 131; 386 wflag++; 387 break; 388 case 'X': 389 /* 390 * Note that `-X' and `-x' are not standard "selector" 391 * options. For most selector-options, we check *all* 392 * processes to see if any are matched by the given 393 * value(s). After we have a set of all the matched 394 * processes, then `-X' and `-x' govern whether we 395 * modify that *matched* set for processes which do 396 * not have a controlling terminal. `-X' causes 397 * those processes to be deleted from the matched 398 * set, while `-x' causes them to be kept. 399 */ 400 xkeep = 0; 401 break; 402 case 'x': 403 xkeep = 1; 404 break; 405 case 'Z': 406 parsefmt(Zfmt, 0); 407 Zfmt[0] = '\0'; 408 break; 409 case '?': 410 default: 411 usage(); 412 } 413 argc -= optind; 414 argv += optind; 415 if (optfatal) 416 exit(1); /* Error messages already printed. */ 417 if (xkeep < 0) /* Neither -X nor -x was specified. */ 418 xkeep = xkeep_implied; 419 420#define BACKWARD_COMPATIBILITY 421#ifdef BACKWARD_COMPATIBILITY 422 if (*argv) { 423 nlistf = *argv; 424 if (*++argv) 425 memf = *argv; 426 } 427#endif 428 /* 429 * Discard setgid privileges if not the running kernel so that bad 430 * guys can't print interesting stuff from kernel memory. 431 */ 432 if (dropgid) { 433 setgid(getgid()); 434 setuid(getuid()); 435 } 436 437 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 438 if (kd == 0) 439 errx(1, "%s", errbuf); 440 441 if (!_fmt) 442 parsefmt(dfmt, 0); 443 444 if (nselectors == 0) { 445 uidlist.ptr = malloc(sizeof(uid_t)); 446 if (uidlist.ptr == NULL) 447 errx(1, "malloc failed"); 448 nselectors = 1; 449 uidlist.count = uidlist.maxcount = 1; 450 *uidlist.uids = getuid(); 451 } 452 453 /* 454 * scan requested variables, noting what structures are needed, 455 * and adjusting header widths as appropriate. 456 */ 457 scanvars(); 458 459 /* 460 * Get process list. If the user requested just one selector- 461 * option, then kvm_getprocs can be asked to return just those 462 * processes. Otherwise, have it return all processes, and 463 * then this routine will search that full list and select the 464 * processes which match any of the user's selector-options. 465 */ 466 what = showthreads != 0 ? KERN_PROC_ALL : KERN_PROC_PROC; 467 flag = 0; 468 if (nselectors == 1) { 469 /* XXX - Apparently there's no KERN_PROC_GID flag. */ 470 if (pgrplist.count == 1) { 471 what = KERN_PROC_PGRP | showthreads; 472 flag = *pgrplist.pids; 473 nselectors = 0; 474 } else if (pidlist.count == 1) { 475 what = KERN_PROC_PID | showthreads; 476 flag = *pidlist.pids; 477 nselectors = 0; 478 } else if (ruidlist.count == 1) { 479 what = KERN_PROC_RUID | showthreads; 480 flag = *ruidlist.uids; 481 nselectors = 0; 482#if 0 483 /* 484 * XXX - KERN_PROC_SESSION causes error in kvm_getprocs? 485 * For now, always do sid-matching in this routine. 486 */ 487 } else if (sesslist.count == 1) { 488 what = KERN_PROC_SESSION | showthreads; 489 flag = *sesslist.pids; 490 nselectors = 0; 491#endif 492 } else if (ttylist.count == 1) { 493 what = KERN_PROC_TTY | showthreads; 494 flag = *ttylist.ttys; 495 nselectors = 0; 496 } else if (uidlist.count == 1) { 497 what = KERN_PROC_UID | showthreads; 498 flag = *uidlist.uids; 499 nselectors = 0; 500 } else if (all) { 501 /* No need for this routine to select processes. */ 502 nselectors = 0; 503 } 504 } 505 506 /* 507 * select procs 508 */ 509 nentries = -1; 510 kp = kvm_getprocs(kd, what, flag, &nentries); 511 if ((kp == NULL && nentries > 0) || (kp != NULL && nentries < 0)) 512 errx(1, "%s", kvm_geterr(kd)); 513 nkept = 0; 514 if (nentries > 0) { 515 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 516 errx(1, "malloc failed"); 517 for (i = nentries; --i >= 0; ++kp) { 518 /* 519 * If the user specified multiple selection-criteria, 520 * then keep any process matched by the inclusive OR 521 * of all the selection-criteria given. 522 */ 523 if (pidlist.count > 0) { 524 for (elem = 0; elem < pidlist.count; elem++) 525 if (kp->ki_pid == pidlist.pids[elem]) 526 goto keepit; 527 } 528 /* 529 * Note that we had to process pidlist before 530 * filtering out processes which do not have 531 * a controlling terminal. 532 */ 533 if (xkeep == 0) { 534 if ((kp->ki_tdev == NODEV || 535 (kp->ki_flag & P_CONTROLT) == 0)) 536 continue; 537 } 538 if (nselectors == 0) 539 goto keepit; 540 if (gidlist.count > 0) { 541 for (elem = 0; elem < gidlist.count; elem++) 542 if (kp->ki_rgid == gidlist.gids[elem]) 543 goto keepit; 544 } 545 if (pgrplist.count > 0) { 546 for (elem = 0; elem < pgrplist.count; elem++) 547 if (kp->ki_pgid == pgrplist.pids[elem]) 548 goto keepit; 549 } 550 if (ruidlist.count > 0) { 551 for (elem = 0; elem < ruidlist.count; elem++) 552 if (kp->ki_ruid == ruidlist.uids[elem]) 553 goto keepit; 554 } 555 if (sesslist.count > 0) { 556 for (elem = 0; elem < sesslist.count; elem++) 557 if (kp->ki_sid == sesslist.pids[elem]) 558 goto keepit; 559 } 560 if (ttylist.count > 0) { 561 for (elem = 0; elem < ttylist.count; elem++) 562 if (kp->ki_tdev == ttylist.ttys[elem]) 563 goto keepit; 564 } 565 if (uidlist.count > 0) { 566 for (elem = 0; elem < uidlist.count; elem++) 567 if (kp->ki_uid == uidlist.uids[elem]) 568 goto keepit; 569 } 570 /* 571 * This process did not match any of the user's 572 * selector-options, so skip the process. 573 */ 574 continue; 575 576 keepit: 577 kinfo[nkept].ki_p = kp; 578 if (needuser) 579 saveuser(&kinfo[nkept]); 580 dynsizevars(&kinfo[nkept]); 581 nkept++; 582 } 583 } 584 585 sizevars(); 586 587 /* 588 * print header 589 */ 590 printheader(); 591 if (nkept == 0) 592 exit(1); 593 594 /* 595 * sort proc list 596 */ 597 qsort(kinfo, nkept, sizeof(KINFO), pscomp); 598 /* 599 * For each process, call each variable output function. 600 */ 601 for (i = lineno = 0; i < nkept; i++) { 602 for (vent = vhead; vent; vent = vent->next) { 603 (vent->var->oproc)(&kinfo[i], vent); 604 if (vent->next != NULL) 605 (void)putchar(' '); 606 } 607 (void)putchar('\n'); 608 if (prtheader && lineno++ == prtheader - 4) { 609 (void)putchar('\n'); 610 printheader(); 611 lineno = 0; 612 } 613 } 614 free_list(&gidlist); 615 free_list(&pidlist); 616 free_list(&pgrplist); 617 free_list(&ruidlist); 618 free_list(&sesslist); 619 free_list(&ttylist); 620 free_list(&uidlist); 621 622 exit(eval); 623} 624 625static int 626addelem_gid(struct listinfo *inf, const char *elem) 627{ 628 struct group *grp; 629 const char *nameorID; 630 char *endp; 631 intmax_t ltemp; 632 633 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 634 if (*elem == '\0') 635 warnx("Invalid (zero-length) %s name", inf->lname); 636 else 637 warnx("%s name too long: %s", inf->lname, elem); 638 optfatal = 1; 639 return (0); /* Do not add this value. */ 640 } 641 642 /* 643 * SUSv3 states that `ps -G grouplist' should match "real-group 644 * ID numbers", and does not mention group-names. I do want to 645 * also support group-names, so this tries for a group-id first, 646 * and only tries for a name if that doesn't work. This is the 647 * opposite order of what is done in addelem_uid(), but in 648 * practice the order would only matter for group-names which 649 * are all-numeric. 650 */ 651 grp = NULL; 652 nameorID = "named"; 653 errno = 0; 654 ltemp = strtol(elem, &endp, 10); 655 if (errno == 0 && *endp == '\0' && ltemp >= 0 && ltemp <= GID_MAX) { 656 nameorID = "name or ID matches"; 657 grp = getgrgid((gid_t)ltemp); 658 } 659 if (grp == NULL) 660 grp = getgrnam(elem); 661 if (grp == NULL) { 662 warnx("No %s %s '%s'", inf->lname, nameorID, elem); 663 optfatal = 1; 664 return (0); /* Do not add this value. */ 665 } 666 667 if (inf->count >= inf->maxcount) 668 expand_list(inf); 669 inf->gids[(inf->count)++] = grp->gr_gid; 670 return (1); 671} 672 673#define BSD_PID_MAX 99999 /* Copy of PID_MAX from sys/proc.h. */ 674static int 675addelem_pid(struct listinfo *inf, const char *elem) 676{ 677 char *endp; 678 long tempid; 679 680 if (*elem == '\0') 681 tempid = 0L; 682 else { 683 errno = 0; 684 tempid = strtol(elem, &endp, 10); 685 if (*endp != '\0' || tempid < 0 || elem == endp) { 686 warnx("Invalid %s: %s", inf->lname, elem); 687 errno = ERANGE; 688 } else if (errno != 0 || tempid > BSD_PID_MAX) { 689 warnx("%s too large: %s", inf->lname, elem); 690 errno = ERANGE; 691 } 692 if (errno == ERANGE) { 693 optfatal = 1; 694 return (0); /* Do not add this value. */ 695 } 696 } 697 698 if (inf->count >= inf->maxcount) 699 expand_list(inf); 700 inf->pids[(inf->count)++] = tempid; 701 return (1); 702} 703#undef BSD_PID_MAX 704 705static int 706addelem_tty(struct listinfo *inf, const char *elem) 707{ 708 const char *ttypath; 709 struct stat sb; 710 char pathbuf[PATH_MAX]; 711 712 if (strcmp(elem, "co") == 0) 713 ttypath = strdup(_PATH_CONSOLE); 714 else if (*elem == '/') 715 ttypath = elem; 716 else { 717 strlcpy(pathbuf, _PATH_TTY, sizeof(pathbuf)); 718 strlcat(pathbuf, elem, sizeof(pathbuf)); 719 ttypath = pathbuf; 720 } 721 722 if (stat(ttypath, &sb) == -1) { 723 warn("%s", ttypath); 724 optfatal = 1; 725 return (0); /* Do not add this value. */ 726 } 727 if (!S_ISCHR(sb.st_mode)) { 728 warn("%s: Not a terminal", ttypath); 729 optfatal = 1; 730 return (0); /* Do not add this value. */ 731 } 732 733 if (inf->count >= inf->maxcount) 734 expand_list(inf); 735 inf->ttys[(inf->count)++] = sb.st_rdev; 736 return (1); 737} 738 739static int 740addelem_uid(struct listinfo *inf, const char *elem) 741{ 742 struct passwd *pwd; 743 char *endp; 744 intmax_t ltemp; 745 746 if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) { 747 if (*elem == '\0') 748 warnx("Invalid (zero-length) %s name", inf->lname); 749 else 750 warnx("%s name too long: %s", inf->lname, elem); 751 optfatal = 1; 752 return (0); /* Do not add this value. */ 753 } 754 755 pwd = getpwnam(elem); 756 if (pwd == NULL) { 757 errno = 0; 758 ltemp = strtol(elem, &endp, 10); 759 if (errno != 0 || *endp != '\0' || ltemp < 0 || 760 ltemp > UID_MAX) 761 warnx("No %s named '%s'", inf->lname, elem); 762 else { 763 /* The string is all digits, so it might be a userID. */ 764 pwd = getpwuid((uid_t)ltemp); 765 if (pwd == NULL) 766 warnx("No %s name or ID matches '%s'", 767 inf->lname, elem); 768 } 769 } 770 if (pwd == NULL) { 771 /* 772 * These used to be treated as minor warnings (and the 773 * option was simply ignored), but now they are fatal 774 * errors (and the command will be aborted). 775 */ 776 optfatal = 1; 777 return (0); /* Do not add this value. */ 778 } 779 780 if (inf->count >= inf->maxcount) 781 expand_list(inf); 782 inf->uids[(inf->count)++] = pwd->pw_uid; 783 return (1); 784} 785 786static void 787add_list(struct listinfo *inf, const char *argp) 788{ 789 const char *savep; 790 char *cp, *endp; 791 int toolong; 792 char elemcopy[PATH_MAX]; 793 794 while (*argp != '\0') { 795 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 796 argp++; 797 savep = argp; 798 toolong = 0; 799 cp = elemcopy; 800 if (strchr(T_SEP, *argp) == NULL) { 801 endp = elemcopy + sizeof(elemcopy) - 1; 802 while (*argp != '\0' && cp <= endp && 803 strchr(W_SEP T_SEP, *argp) == NULL) 804 *cp++ = *argp++; 805 if (cp > endp) 806 toolong = 1; 807 } 808 if (!toolong) { 809 *cp = '\0'; 810#ifndef ADD_PS_LISTRESET 811 /* 812 * This is how the standard expects lists to 813 * be handled. 814 */ 815 inf->addelem(inf, elemcopy); 816#else 817 /* 818 * This would add a simple non-standard-but-convienent 819 * feature. 820 * 821 * XXX - The first time I tried to add this check, 822 * it increased the total size of `ps' by 3940 823 * bytes on i386! That's 12% of the entire 824 * program! The `ps.o' file grew by only about 825 * 40 bytes, but the final (stripped) executable 826 * in /bin/ps grew by 12%. I have not had time 827 * to investigate, so skip the feature for now. 828 */ 829 /* 830 * We now have a single element. Add it to the 831 * list, unless the element is ":". In that case, 832 * reset the list so previous entries are ignored. 833 */ 834 if (strcmp(elemcopy, ":") == 0) 835 inf->count = 0; 836 else 837 inf->addelem(inf, elemcopy); 838#endif 839 } else { 840 /* 841 * The string is too long to copy. Find the end 842 * of the string to print out the warning message. 843 */ 844 while (*argp != '\0' && strchr(W_SEP T_SEP, 845 *argp) == NULL) 846 argp++; 847 warnx("Value too long: %.*s", (int)(argp - savep), 848 savep); 849 optfatal = 1; 850 } 851 /* 852 * Skip over any number of trailing whitespace characters, 853 * but only one (at most) trailing element-terminating 854 * character. 855 */ 856 while (*argp != '\0' && strchr(W_SEP, *argp) != NULL) 857 argp++; 858 if (*argp != '\0' && strchr(T_SEP, *argp) != NULL) { 859 argp++; 860 /* Catch case where string ended with a comma. */ 861 if (*argp == '\0') 862 inf->addelem(inf, argp); 863 } 864 } 865} 866 867static void * 868expand_list(struct listinfo *inf) 869{ 870 void *newlist; 871 int newmax; 872 873 newmax = (inf->maxcount + 1) << 1; 874 newlist = realloc(inf->ptr, newmax * inf->elemsize); 875 if (newlist == NULL) { 876 free(inf->ptr); 877 errx(1, "realloc to %d %ss failed", newmax, 878 inf->lname); 879 } 880 inf->maxcount = newmax; 881 inf->ptr = newlist; 882 883 return (newlist); 884} 885 886static void 887free_list(struct listinfo *inf) 888{ 889 890 inf->count = inf->elemsize = inf->maxcount = 0; 891 if (inf->ptr != NULL) 892 free(inf->ptr); 893 inf->addelem = NULL; 894 inf->lname = NULL; 895 inf->ptr = NULL; 896} 897 898static void 899init_list(struct listinfo *inf, addelem_rtn artn, int elemsize, 900 const char *lname) 901{ 902 903 inf->count = inf->maxcount = 0; 904 inf->elemsize = elemsize; 905 inf->addelem = artn; 906 inf->lname = lname; 907 inf->ptr = NULL; 908} 909 910VARENT * 911find_varentry(VAR *v) 912{ 913 struct varent *vent; 914 915 for (vent = vhead; vent; vent = vent->next) { 916 if (strcmp(vent->var->name, v->name) == 0) 917 return vent; 918 } 919 return NULL; 920} 921 922static void 923scanvars(void) 924{ 925 struct varent *vent; 926 VAR *v; 927 928 for (vent = vhead; vent; vent = vent->next) { 929 v = vent->var; 930 if (v->flag & DSIZ) { 931 v->dwidth = v->width; 932 v->width = 0; 933 } 934 if (v->flag & USER) 935 needuser = 1; 936 if (v->flag & COMM) 937 needcomm = 1; 938 } 939} 940 941static void 942dynsizevars(KINFO *ki) 943{ 944 struct varent *vent; 945 VAR *v; 946 int i; 947 948 for (vent = vhead; vent; vent = vent->next) { 949 v = vent->var; 950 if (!(v->flag & DSIZ)) 951 continue; 952 i = (v->sproc)( ki); 953 if (v->width < i) 954 v->width = i; 955 if (v->width > v->dwidth) 956 v->width = v->dwidth; 957 } 958} 959 960static void 961sizevars(void) 962{ 963 struct varent *vent; 964 VAR *v; 965 int i; 966 967 for (vent = vhead; vent; vent = vent->next) { 968 v = vent->var; 969 i = strlen(vent->header); 970 if (v->width < i) 971 v->width = i; 972 totwidth += v->width + 1; /* +1 for space */ 973 } 974 totwidth--; 975} 976 977static const char * 978fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki, 979 char *comm, int maxlen) 980{ 981 const char *s; 982 983 s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen); 984 return (s); 985} 986 987#define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM)) 988 989static void 990saveuser(KINFO *ki) 991{ 992 993 if (ki->ki_p->ki_sflag & PS_INMEM) { 994 /* 995 * The u-area might be swapped out, and we can't get 996 * at it because we have a crashdump and no swap. 997 * If it's here fill in these fields, otherwise, just 998 * leave them 0. 999 */ 1000 ki->ki_valid = 1; 1001 } else 1002 ki->ki_valid = 0; 1003 /* 1004 * save arguments if needed 1005 */ 1006 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 1007 ki->ki_args = strdup(fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 1008 MAXCOMLEN)); 1009 } else if (needcomm) { 1010 asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm); 1011 } else { 1012 ki->ki_args = NULL; 1013 } 1014 if (needenv && UREADOK(ki)) { 1015 ki->ki_env = strdup(fmt(kvm_getenvv, ki, (char *)NULL, 0)); 1016 } else if (needenv) { 1017 ki->ki_env = malloc(3); 1018 strcpy(ki->ki_env, "()"); 1019 } else { 1020 ki->ki_env = NULL; 1021 } 1022} 1023 1024static int 1025pscomp(const void *a, const void *b) 1026{ 1027 const KINFO *ka, *kb; 1028 double cpua, cpub; 1029 segsz_t sizea, sizeb; 1030 1031 ka = a; 1032 kb = b; 1033 /* SORTCPU and SORTMEM are sorted in descending order. */ 1034 if (sortby == SORTCPU) { 1035 cpua = getpcpu(ka); 1036 cpub = getpcpu(kb); 1037 if (cpua < cpub) 1038 return (1); 1039 if (cpua > cpub) 1040 return (-1); 1041 } 1042 if (sortby == SORTMEM) { 1043 sizea = ka->ki_p->ki_tsize + ka->ki_p->ki_dsize + 1044 ka->ki_p->ki_ssize; 1045 sizeb = kb->ki_p->ki_tsize + kb->ki_p->ki_dsize + 1046 kb->ki_p->ki_ssize; 1047 if (sizea < sizeb) 1048 return (1); 1049 if (sizea > sizeb) 1050 return (-1); 1051 } 1052 /* 1053 * TTY's are sorted in ascending order, except that all NODEV 1054 * processes come before all processes with a device. 1055 */ 1056 if (ka->ki_p->ki_tdev == NODEV && kb->ki_p->ki_tdev != NODEV) 1057 return (-1); 1058 if (ka->ki_p->ki_tdev != NODEV && kb->ki_p->ki_tdev == NODEV) 1059 return (1); 1060 if (ka->ki_p->ki_tdev < kb->ki_p->ki_tdev) 1061 return (-1); 1062 if (ka->ki_p->ki_tdev > kb->ki_p->ki_tdev) 1063 return (1); 1064 /* PID's are sorted in ascending order. */ 1065 if (ka->ki_p->ki_pid < kb->ki_p->ki_pid) 1066 return (-1); 1067 if (ka->ki_p->ki_pid > kb->ki_p->ki_pid) 1068 return (1); 1069 return (0); 1070} 1071 1072/* 1073 * ICK (all for getopt), would rather hide the ugliness 1074 * here than taint the main code. 1075 * 1076 * ps foo -> ps -foo 1077 * ps 34 -> ps -p34 1078 * 1079 * The old convention that 't' with no trailing tty arg means the users 1080 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 1081 * feature is available with the option 'T', which takes no argument. 1082 */ 1083static char * 1084kludge_oldps_options(char *s) 1085{ 1086 int have_fmt; 1087 size_t len; 1088 char *newopts, *ns, *cp; 1089 1090 /* 1091 * If we have an 'o' option, then note it, since we don't want to do 1092 * some types of munging. 1093 */ 1094 have_fmt = index(s, 'o') != NULL; 1095 1096 len = strlen(s); 1097 if ((newopts = ns = malloc(len + 2)) == NULL) 1098 errx(1, "malloc failed"); 1099 /* 1100 * options begin with '-' 1101 */ 1102 if (*s != '-') 1103 *ns++ = '-'; /* add option flag */ 1104 /* 1105 * gaze to end of argv[1] 1106 */ 1107 cp = s + len - 1; 1108 /* 1109 * if last letter is a 't' flag with no argument (in the context 1110 * of the oldps options -- option string NOT starting with a '-' -- 1111 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 1112 * 1113 * However, if a flag accepting a string argument is found in the 1114 * option string, the remainder of the string is the argument to 1115 * that flag; do not modify that argument. 1116 */ 1117 if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-') 1118 *cp = 'T'; 1119 else { 1120 /* 1121 * otherwise check for trailing number, which *may* be a 1122 * pid. 1123 */ 1124 while (cp >= s && isdigit(*cp)) 1125 --cp; 1126 } 1127 cp++; 1128 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 1129 ns += cp - s; 1130 /* 1131 * if there's a trailing number, and not a preceding 'p' (pid) or 1132 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 1133 */ 1134 if (isdigit(*cp) && 1135 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 1136 (cp - 1 == s || cp[-2] != 't') && !have_fmt) 1137 *ns++ = 'p'; 1138 (void)strcpy(ns, cp); /* and append the number */ 1139 1140 return (newopts); 1141} 1142 1143static void 1144usage(void) 1145{ 1146#define SINGLE_OPTS "[-aC" OPT_LAZY_f "HhjlmrSTuvwXxZ]" 1147 1148 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 1149 "usage: ps " SINGLE_OPTS " [-G gid[,gid]] [-O|o fmt]", 1150 " [-p pid[,pid]] [-t tty[,tty]] [-U user[,user]]", 1151 " [-M core] [-N system]", 1152 " ps [-L]"); 1153 exit(1); 1154} 1155