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) 1990, 1993, 1994 The Regents of the University of California. All rights reserved. 34 * @(#)ps.c 8.4 (Berkeley) 4/2/94 35 * $FreeBSD: src/bin/ps/ps.c,v 1.30.2.6 2002/07/04 08:30:37 sobomax Exp $ 36 * $DragonFly: src/bin/ps/ps.c,v 1.3 2003/07/01 00:19:29 dillon Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/user.h> 41 #include <sys/time.h> 42 #include <sys/resource.h> 43 #include <sys/stat.h> 44 #include <sys/ioctl.h> 45 #include <sys/sysctl.h> 46 47 #include <ctype.h> 48 #include <err.h> 49 #include <errno.h> 50 #include <fcntl.h> 51 #include <kvm.h> 52 #include <limits.h> 53 #include <locale.h> 54 #include <nlist.h> 55 #include <paths.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 #include <pwd.h> 61 #include <utmp.h> 62 63 #include "ps.h" 64 65 #define SEP ", \t" /* username separators */ 66 67 KINFO *kinfo; 68 struct varent *vhead, *vtail; 69 70 int eval; /* exit value */ 71 int cflag; /* -c */ 72 int rawcpu; /* -C */ 73 int sumrusage; /* -S */ 74 int termwidth; /* width of screen (0 == infinity) */ 75 int totwidth; /* calculated width of requested variables */ 76 77 static int needuser, needcomm, needenv; 78 #if defined(LAZY_PS) 79 static int forceuread=0; 80 #define PS_ARGS "aCcefghjLlM:mN:O:o:p:rSTt:U:uvwx" 81 #else 82 static int forceuread=1; 83 #define PS_ARGS "aCceghjLlM:mN:O:o:p:rSTt:U:uvwx" 84 #endif 85 86 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 87 88 static char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int), 89 KINFO *, char *, int)); 90 static char *kludge_oldps_options __P((char *)); 91 static int pscomp __P((const void *, const void *)); 92 static void saveuser __P((KINFO *)); 93 static void scanvars __P((void)); 94 static void dynsizevars __P((KINFO *)); 95 static void sizevars __P((void)); 96 static void usage __P((void)); 97 static uid_t *getuids(const char *, int *); 98 99 char dfmt[] = "pid tt state time command"; 100 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 101 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 102 char o1[] = "pid"; 103 char o2[] = "tt state time command"; 104 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 105 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 106 107 kvm_t *kd; 108 109 int 110 main(argc, argv) 111 int argc; 112 char *argv[]; 113 { 114 struct kinfo_proc *kp; 115 struct varent *vent; 116 struct winsize ws; 117 dev_t ttydev; 118 pid_t pid; 119 uid_t *uids; 120 int all, ch, flag, i, fmt, lineno, nentries, nocludge, dropgid; 121 int prtheader, wflag, what, xflg, uid, nuids; 122 char *cp, *nlistf, *memf, errbuf[_POSIX2_LINE_MAX]; 123 124 (void) setlocale(LC_ALL, ""); 125 126 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 127 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 128 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 129 ws.ws_col == 0) 130 termwidth = 79; 131 else 132 termwidth = ws.ws_col - 1; 133 134 /* 135 * Don't apply a kludge if the first argument is an option taking an 136 * argument 137 */ 138 if (argc > 1) { 139 nocludge = 0; 140 if (argv[1][0] == '-') { 141 for (cp = PS_ARGS; *cp != '\0'; cp++) { 142 if (*cp != ':') 143 continue; 144 if (*(cp - 1) == argv[1][1]) { 145 nocludge = 1; 146 break; 147 } 148 } 149 } 150 if (nocludge == 0) 151 argv[1] = kludge_oldps_options(argv[1]); 152 } 153 154 all = fmt = prtheader = wflag = xflg = 0; 155 pid = -1; 156 nuids = 0; 157 uids = NULL; 158 ttydev = NODEV; 159 dropgid = 0; 160 memf = nlistf = _PATH_DEVNULL; 161 while ((ch = getopt(argc, argv, PS_ARGS)) != -1) 162 switch((char)ch) { 163 case 'a': 164 all = 1; 165 break; 166 case 'C': 167 rawcpu = 1; 168 break; 169 case 'c': 170 cflag = 1; 171 break; 172 case 'e': /* XXX set ufmt */ 173 needenv = 1; 174 break; 175 case 'g': 176 break; /* no-op */ 177 case 'h': 178 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 179 break; 180 case 'j': 181 parsefmt(jfmt); 182 fmt = 1; 183 jfmt[0] = '\0'; 184 break; 185 case 'L': 186 showkey(); 187 exit(0); 188 case 'l': 189 parsefmt(lfmt); 190 fmt = 1; 191 lfmt[0] = '\0'; 192 break; 193 case 'M': 194 memf = optarg; 195 dropgid = 1; 196 break; 197 case 'm': 198 sortby = SORTMEM; 199 break; 200 case 'N': 201 nlistf = optarg; 202 dropgid = 1; 203 break; 204 case 'O': 205 parsefmt(o1); 206 parsefmt(optarg); 207 parsefmt(o2); 208 o1[0] = o2[0] = '\0'; 209 fmt = 1; 210 break; 211 case 'o': 212 parsefmt(optarg); 213 fmt = 1; 214 break; 215 #if defined(LAZY_PS) 216 case 'f': 217 if (getuid() == 0 || getgid() == 0) 218 forceuread = 1; 219 break; 220 #endif 221 case 'p': 222 pid = atol(optarg); 223 xflg = 1; 224 break; 225 case 'r': 226 sortby = SORTCPU; 227 break; 228 case 'S': 229 sumrusage = 1; 230 break; 231 case 'T': 232 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 233 errx(1, "stdin: not a terminal"); 234 /* FALLTHROUGH */ 235 case 't': { 236 struct stat sb; 237 char *ttypath, pathbuf[PATH_MAX]; 238 239 if (strcmp(optarg, "co") == 0) 240 ttypath = _PATH_CONSOLE; 241 else if (*optarg != '/') 242 (void)snprintf(ttypath = pathbuf, 243 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 244 else 245 ttypath = optarg; 246 if (stat(ttypath, &sb) == -1) 247 err(1, "%s", ttypath); 248 if (!S_ISCHR(sb.st_mode)) 249 errx(1, "%s: not a terminal", ttypath); 250 ttydev = sb.st_rdev; 251 break; 252 } 253 case 'U': 254 uids = getuids(optarg, &nuids); 255 xflg++; /* XXX: intuitive? */ 256 break; 257 case 'u': 258 parsefmt(ufmt); 259 sortby = SORTCPU; 260 fmt = 1; 261 ufmt[0] = '\0'; 262 break; 263 case 'v': 264 parsefmt(vfmt); 265 sortby = SORTMEM; 266 fmt = 1; 267 vfmt[0] = '\0'; 268 break; 269 case 'w': 270 if (wflag) 271 termwidth = UNLIMITED; 272 else if (termwidth < 131) 273 termwidth = 131; 274 wflag++; 275 break; 276 case 'x': 277 xflg = 1; 278 break; 279 case '?': 280 default: 281 usage(); 282 } 283 argc -= optind; 284 argv += optind; 285 286 #define BACKWARD_COMPATIBILITY 287 #ifdef BACKWARD_COMPATIBILITY 288 if (*argv) { 289 nlistf = *argv; 290 if (*++argv) { 291 memf = *argv; 292 } 293 } 294 #endif 295 /* 296 * Discard setgid privileges if not the running kernel so that bad 297 * guys can't print interesting stuff from kernel memory. 298 */ 299 if (dropgid) { 300 setgid(getgid()); 301 setuid(getuid()); 302 } 303 304 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 305 if (kd == 0) 306 errx(1, "%s", errbuf); 307 308 if (!fmt) 309 parsefmt(dfmt); 310 311 /* XXX - should be cleaner */ 312 if (!all && ttydev == NODEV && pid == -1 && !nuids) { 313 if ((uids = malloc(sizeof (*uids))) == NULL) 314 errx(1, "malloc: %s", strerror(errno)); 315 nuids = 1; 316 *uids = getuid(); 317 } 318 319 /* 320 * scan requested variables, noting what structures are needed, 321 * and adjusting header widths as appropriate. 322 */ 323 scanvars(); 324 /* 325 * get proc list 326 */ 327 if (nuids == 1) { 328 what = KERN_PROC_UID; 329 flag = *uids; 330 } else if (ttydev != NODEV) { 331 what = KERN_PROC_TTY; 332 flag = ttydev; 333 } else if (pid != -1) { 334 what = KERN_PROC_PID; 335 flag = pid; 336 } else { 337 what = KERN_PROC_ALL; 338 flag = 0; 339 } 340 /* 341 * select procs 342 */ 343 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 344 errx(1, "%s", kvm_geterr(kd)); 345 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 346 err(1, NULL); 347 for (i = nentries; --i >= 0; ++kp) { 348 kinfo[i].ki_p = kp; 349 if (needuser) 350 saveuser(&kinfo[i]); 351 dynsizevars(&kinfo[i]); 352 } 353 354 sizevars(); 355 356 /* 357 * print header 358 */ 359 printheader(); 360 if (nentries == 0) 361 exit(1); 362 /* 363 * sort proc list 364 */ 365 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 366 /* 367 * for each proc, call each variable output function. 368 */ 369 for (i = lineno = 0; i < nentries; i++) { 370 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 371 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 372 continue; 373 if (nuids > 1) { 374 for (uid = 0; uid < nuids; uid++) 375 if (KI_EPROC(&kinfo[i])->e_ucred.cr_uid == 376 uids[uid]) 377 break; 378 if (uid == nuids) 379 continue; 380 } 381 for (vent = vhead; vent; vent = vent->next) { 382 (vent->var->oproc)(&kinfo[i], vent); 383 if (vent->next != NULL) 384 (void)putchar(' '); 385 } 386 (void)putchar('\n'); 387 if (prtheader && lineno++ == prtheader - 4) { 388 (void)putchar('\n'); 389 printheader(); 390 lineno = 0; 391 } 392 } 393 free(uids); 394 395 exit(eval); 396 } 397 398 uid_t * 399 getuids(const char *arg, int *nuids) 400 { 401 char name[UT_NAMESIZE + 1]; 402 struct passwd *pwd; 403 uid_t *uids, *moreuids; 404 int l, alloc; 405 406 407 alloc = 0; 408 *nuids = 0; 409 uids = NULL; 410 for (; (l = strcspn(arg, SEP)) > 0; arg += l + strspn(arg + l, SEP)) { 411 if (l >= sizeof name) { 412 warnx("%.*s: name too long", l, arg); 413 continue; 414 } 415 strncpy(name, arg, l); 416 name[l] = '\0'; 417 if ((pwd = getpwnam(name)) == NULL) { 418 warnx("%s: no such user", name); 419 continue; 420 } 421 if (*nuids >= alloc) { 422 alloc = (alloc + 1) << 1; 423 moreuids = realloc(uids, alloc * sizeof (*uids)); 424 if (moreuids == NULL) { 425 free(uids); 426 errx(1, "realloc: %s", strerror(errno)); 427 } 428 uids = moreuids; 429 } 430 uids[(*nuids)++] = pwd->pw_uid; 431 } 432 endpwent(); 433 434 if (!*nuids) 435 errx(1, "No users specified"); 436 437 return uids; 438 } 439 440 static void 441 scanvars() 442 { 443 struct varent *vent; 444 VAR *v; 445 446 for (vent = vhead; vent; vent = vent->next) { 447 v = vent->var; 448 if (v->flag & DSIZ) { 449 v->dwidth = v->width; 450 v->width = 0; 451 } 452 if (v->flag & USER) 453 needuser = 1; 454 if (v->flag & COMM) 455 needcomm = 1; 456 } 457 } 458 459 static void 460 dynsizevars(ki) 461 KINFO *ki; 462 { 463 struct varent *vent; 464 VAR *v; 465 int i; 466 467 for (vent = vhead; vent; vent = vent->next) { 468 v = vent->var; 469 if (!(v->flag & DSIZ)) 470 continue; 471 i = (v->sproc)( ki); 472 if (v->width < i) 473 v->width = i; 474 if (v->width > v->dwidth) 475 v->width = v->dwidth; 476 } 477 } 478 479 static void 480 sizevars() 481 { 482 struct varent *vent; 483 VAR *v; 484 int i; 485 486 for (vent = vhead; vent; vent = vent->next) { 487 v = vent->var; 488 i = strlen(v->header); 489 if (v->width < i) 490 v->width = i; 491 totwidth += v->width + 1; /* +1 for space */ 492 } 493 totwidth--; 494 } 495 496 static char * 497 fmt(fn, ki, comm, maxlen) 498 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 499 KINFO *ki; 500 char *comm; 501 int maxlen; 502 { 503 char *s; 504 505 if ((s = 506 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 507 err(1, NULL); 508 return (s); 509 } 510 511 #define UREADOK(ki) (forceuread || (KI_PROC(ki)->p_flag & P_INMEM)) 512 513 static void 514 saveuser(ki) 515 KINFO *ki; 516 { 517 struct usave *usp; 518 519 usp = &ki->ki_u; 520 521 if (KI_PROC(ki)->p_flag & P_INMEM) { 522 /* 523 * The u-area might be swapped out, and we can't get 524 * at it because we have a crashdump and no swap. 525 * If it's here fill in these fields, otherwise, just 526 * leave them 0. 527 */ 528 usp->u_start = KI_EPROC(ki)->e_stats.p_start; 529 usp->u_ru = KI_EPROC(ki)->e_stats.p_ru; 530 usp->u_cru = KI_EPROC(ki)->e_stats.p_cru; 531 usp->u_valid = 1; 532 } else 533 usp->u_valid = 0; 534 /* 535 * save arguments if needed 536 */ 537 if (needcomm && (UREADOK(ki) || (KI_PROC(ki)->p_args != NULL))) { 538 ki->ki_args = fmt(kvm_getargv, ki, KI_THREAD(ki)->td_comm, 539 MAXCOMLEN); 540 } else if (needcomm) { 541 ki->ki_args = malloc(strlen(KI_THREAD(ki)->td_comm) + 3); 542 sprintf(ki->ki_args, "(%s)", KI_THREAD(ki)->td_comm); 543 } else { 544 ki->ki_args = NULL; 545 } 546 if (needenv && UREADOK(ki)) { 547 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 548 } else if (needenv) { 549 ki->ki_env = malloc(3); 550 strcpy(ki->ki_env, "()"); 551 } else { 552 ki->ki_env = NULL; 553 } 554 } 555 556 static int 557 pscomp(a, b) 558 const void *a, *b; 559 { 560 int i; 561 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 562 KI_EPROC(k)->e_vm.vm_tsize) 563 564 if (sortby == SORTCPU) 565 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 566 if (sortby == SORTMEM) 567 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 568 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 569 if (i == 0) 570 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 571 return (i); 572 } 573 574 /* 575 * ICK (all for getopt), would rather hide the ugliness 576 * here than taint the main code. 577 * 578 * ps foo -> ps -foo 579 * ps 34 -> ps -p34 580 * 581 * The old convention that 't' with no trailing tty arg means the users 582 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 583 * feature is available with the option 'T', which takes no argument. 584 */ 585 static char * 586 kludge_oldps_options(s) 587 char *s; 588 { 589 size_t len; 590 char *newopts, *ns, *cp; 591 592 len = strlen(s); 593 if ((newopts = ns = malloc(len + 2)) == NULL) 594 err(1, NULL); 595 /* 596 * options begin with '-' 597 */ 598 if (*s != '-') 599 *ns++ = '-'; /* add option flag */ 600 /* 601 * gaze to end of argv[1] 602 */ 603 cp = s + len - 1; 604 /* 605 * if last letter is a 't' flag with no argument (in the context 606 * of the oldps options -- option string NOT starting with a '-' -- 607 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 608 * 609 * However, if a flag accepting a string argument is found in the 610 * option string, the remainder of the string is the argument to 611 * that flag; do not modify that argument. 612 */ 613 if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-') 614 *cp = 'T'; 615 else { 616 /* 617 * otherwise check for trailing number, which *may* be a 618 * pid. 619 */ 620 while (cp >= s && isdigit(*cp)) 621 --cp; 622 } 623 cp++; 624 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 625 ns += cp - s; 626 /* 627 * if there's a trailing number, and not a preceding 'p' (pid) or 628 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 629 */ 630 if (isdigit(*cp) && 631 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 632 (cp - 1 == s || cp[-2] != 't')) 633 *ns++ = 'p'; 634 (void)strcpy(ns, cp); /* and append the number */ 635 636 return (newopts); 637 } 638 639 static void 640 usage() 641 { 642 643 (void)fprintf(stderr, "%s\n%s\n%s\n", 644 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 645 " [-M core] [-N system]", 646 " ps [-L]"); 647 exit(1); 648 } 649