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 1.5 2003/09/28 14:39:15 hmp 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 (char **(*)(kvm_t *, const struct kinfo_proc *, int), 89 KINFO *, char *, int); 90 static char *kludge_oldps_options (char *); 91 static int pscomp (const void *, const void *); 92 static void saveuser (KINFO *); 93 static void scanvars (void); 94 static void dynsizevars (KINFO *); 95 static void sizevars (void); 96 static void usage (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(int argc, char **argv) 111 { 112 struct kinfo_proc *kp; 113 struct varent *vent; 114 struct winsize ws; 115 dev_t ttydev; 116 pid_t pid; 117 uid_t *uids; 118 int all, ch, flag, i, fmt, lineno, nentries, nocludge, dropgid; 119 int prtheader, wflag, what, xflg, uid, nuids; 120 char *cp, *nlistf, *memf, errbuf[_POSIX2_LINE_MAX]; 121 122 (void) setlocale(LC_ALL, ""); 123 124 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 125 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 126 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 127 ws.ws_col == 0) 128 termwidth = 79; 129 else 130 termwidth = ws.ws_col - 1; 131 132 /* 133 * Don't apply a kludge if the first argument is an option taking an 134 * argument 135 */ 136 if (argc > 1) { 137 nocludge = 0; 138 if (argv[1][0] == '-') { 139 for (cp = PS_ARGS; *cp != '\0'; cp++) { 140 if (*cp != ':') 141 continue; 142 if (*(cp - 1) == argv[1][1]) { 143 nocludge = 1; 144 break; 145 } 146 } 147 } 148 if (nocludge == 0) 149 argv[1] = kludge_oldps_options(argv[1]); 150 } 151 152 all = fmt = prtheader = wflag = xflg = 0; 153 pid = -1; 154 nuids = 0; 155 uids = NULL; 156 ttydev = NODEV; 157 dropgid = 0; 158 memf = nlistf = _PATH_DEVNULL; 159 while ((ch = getopt(argc, argv, PS_ARGS)) != -1) 160 switch((char)ch) { 161 case 'a': 162 all = 1; 163 break; 164 case 'C': 165 rawcpu = 1; 166 break; 167 case 'c': 168 cflag = 1; 169 break; 170 case 'e': /* XXX set ufmt */ 171 needenv = 1; 172 break; 173 case 'g': 174 break; /* no-op */ 175 case 'h': 176 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 177 break; 178 case 'j': 179 parsefmt(jfmt); 180 fmt = 1; 181 jfmt[0] = '\0'; 182 break; 183 case 'L': 184 showkey(); 185 exit(0); 186 case 'l': 187 parsefmt(lfmt); 188 fmt = 1; 189 lfmt[0] = '\0'; 190 break; 191 case 'M': 192 memf = optarg; 193 dropgid = 1; 194 break; 195 case 'm': 196 sortby = SORTMEM; 197 break; 198 case 'N': 199 nlistf = optarg; 200 dropgid = 1; 201 break; 202 case 'O': 203 parsefmt(o1); 204 parsefmt(optarg); 205 parsefmt(o2); 206 o1[0] = o2[0] = '\0'; 207 fmt = 1; 208 break; 209 case 'o': 210 parsefmt(optarg); 211 fmt = 1; 212 break; 213 #if defined(LAZY_PS) 214 case 'f': 215 if (getuid() == 0 || getgid() == 0) 216 forceuread = 1; 217 break; 218 #endif 219 case 'p': 220 pid = atol(optarg); 221 xflg = 1; 222 break; 223 case 'r': 224 sortby = SORTCPU; 225 break; 226 case 'S': 227 sumrusage = 1; 228 break; 229 case 'T': 230 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 231 errx(1, "stdin: not a terminal"); 232 /* FALLTHROUGH */ 233 case 't': { 234 struct stat sb; 235 char *ttypath, pathbuf[PATH_MAX]; 236 237 if (strcmp(optarg, "co") == 0) 238 ttypath = _PATH_CONSOLE; 239 else if (*optarg != '/') 240 (void)snprintf(ttypath = pathbuf, 241 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 242 else 243 ttypath = optarg; 244 if (stat(ttypath, &sb) == -1) 245 err(1, "%s", ttypath); 246 if (!S_ISCHR(sb.st_mode)) 247 errx(1, "%s: not a terminal", ttypath); 248 ttydev = sb.st_rdev; 249 break; 250 } 251 case 'U': 252 uids = getuids(optarg, &nuids); 253 xflg++; /* XXX: intuitive? */ 254 break; 255 case 'u': 256 parsefmt(ufmt); 257 sortby = SORTCPU; 258 fmt = 1; 259 ufmt[0] = '\0'; 260 break; 261 case 'v': 262 parsefmt(vfmt); 263 sortby = SORTMEM; 264 fmt = 1; 265 vfmt[0] = '\0'; 266 break; 267 case 'w': 268 if (wflag) 269 termwidth = UNLIMITED; 270 else if (termwidth < 131) 271 termwidth = 131; 272 wflag++; 273 break; 274 case 'x': 275 xflg = 1; 276 break; 277 case '?': 278 default: 279 usage(); 280 } 281 argc -= optind; 282 argv += optind; 283 284 #define BACKWARD_COMPATIBILITY 285 #ifdef BACKWARD_COMPATIBILITY 286 if (*argv) { 287 nlistf = *argv; 288 if (*++argv) { 289 memf = *argv; 290 } 291 } 292 #endif 293 /* 294 * Discard setgid privileges if not the running kernel so that bad 295 * guys can't print interesting stuff from kernel memory. 296 */ 297 if (dropgid) { 298 setgid(getgid()); 299 setuid(getuid()); 300 } 301 302 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 303 if (kd == 0) 304 errx(1, "%s", errbuf); 305 306 if (!fmt) 307 parsefmt(dfmt); 308 309 /* XXX - should be cleaner */ 310 if (!all && ttydev == NODEV && pid == -1 && !nuids) { 311 if ((uids = malloc(sizeof (*uids))) == NULL) 312 errx(1, "malloc: %s", strerror(errno)); 313 nuids = 1; 314 *uids = getuid(); 315 } 316 317 /* 318 * scan requested variables, noting what structures are needed, 319 * and adjusting header widths as appropriate. 320 */ 321 scanvars(); 322 /* 323 * get proc list 324 */ 325 if (nuids == 1) { 326 what = KERN_PROC_UID; 327 flag = *uids; 328 } else if (ttydev != NODEV) { 329 what = KERN_PROC_TTY; 330 flag = ttydev; 331 } else if (pid != -1) { 332 what = KERN_PROC_PID; 333 flag = pid; 334 } else { 335 what = KERN_PROC_ALL; 336 flag = 0; 337 } 338 /* 339 * select procs 340 */ 341 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 342 errx(1, "%s", kvm_geterr(kd)); 343 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 344 err(1, NULL); 345 for (i = nentries; --i >= 0; ++kp) { 346 kinfo[i].ki_p = kp; 347 if (needuser) 348 saveuser(&kinfo[i]); 349 dynsizevars(&kinfo[i]); 350 } 351 352 sizevars(); 353 354 /* 355 * print header 356 */ 357 printheader(); 358 if (nentries == 0) 359 exit(1); 360 /* 361 * sort proc list 362 */ 363 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 364 /* 365 * for each proc, call each variable output function. 366 */ 367 for (i = lineno = 0; i < nentries; i++) { 368 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 369 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 370 continue; 371 if (nuids > 1) { 372 for (uid = 0; uid < nuids; uid++) 373 if (KI_EPROC(&kinfo[i])->e_ucred.cr_uid == 374 uids[uid]) 375 break; 376 if (uid == nuids) 377 continue; 378 } 379 for (vent = vhead; vent; vent = vent->next) { 380 (vent->var->oproc)(&kinfo[i], vent); 381 if (vent->next != NULL) 382 (void)putchar(' '); 383 } 384 (void)putchar('\n'); 385 if (prtheader && lineno++ == prtheader - 4) { 386 (void)putchar('\n'); 387 printheader(); 388 lineno = 0; 389 } 390 } 391 free(uids); 392 393 exit(eval); 394 } 395 396 uid_t * 397 getuids(const char *arg, int *nuids) 398 { 399 char name[UT_NAMESIZE + 1]; 400 struct passwd *pwd; 401 uid_t *uids, *moreuids; 402 int l, alloc; 403 404 405 alloc = 0; 406 *nuids = 0; 407 uids = NULL; 408 for (; (l = strcspn(arg, SEP)) > 0; arg += l + strspn(arg + l, SEP)) { 409 if (l >= sizeof name) { 410 warnx("%.*s: name too long", l, arg); 411 continue; 412 } 413 strncpy(name, arg, l); 414 name[l] = '\0'; 415 if ((pwd = getpwnam(name)) == NULL) { 416 warnx("%s: no such user", name); 417 continue; 418 } 419 if (*nuids >= alloc) { 420 alloc = (alloc + 1) << 1; 421 moreuids = realloc(uids, alloc * sizeof (*uids)); 422 if (moreuids == NULL) { 423 free(uids); 424 errx(1, "realloc: %s", strerror(errno)); 425 } 426 uids = moreuids; 427 } 428 uids[(*nuids)++] = pwd->pw_uid; 429 } 430 endpwent(); 431 432 if (!*nuids) 433 errx(1, "No users specified"); 434 435 return uids; 436 } 437 438 static void 439 scanvars(void) 440 { 441 struct varent *vent; 442 VAR *v; 443 444 for (vent = vhead; vent; vent = vent->next) { 445 v = vent->var; 446 if (v->flag & DSIZ) { 447 v->dwidth = v->width; 448 v->width = 0; 449 } 450 if (v->flag & USER) 451 needuser = 1; 452 if (v->flag & COMM) 453 needcomm = 1; 454 } 455 } 456 457 static void 458 dynsizevars(KINFO *ki) 459 { 460 struct varent *vent; 461 VAR *v; 462 int i; 463 464 for (vent = vhead; vent; vent = vent->next) { 465 v = vent->var; 466 if (!(v->flag & DSIZ)) 467 continue; 468 i = (v->sproc)( ki); 469 if (v->width < i) 470 v->width = i; 471 if (v->width > v->dwidth) 472 v->width = v->dwidth; 473 } 474 } 475 476 static void 477 sizevars(void) 478 { 479 struct varent *vent; 480 VAR *v; 481 int i; 482 483 for (vent = vhead; vent; vent = vent->next) { 484 v = vent->var; 485 i = strlen(v->header); 486 if (v->width < i) 487 v->width = i; 488 totwidth += v->width + 1; /* +1 for space */ 489 } 490 totwidth--; 491 } 492 493 static char * 494 fmt(char **(*fn) (kvm_t *, const struct kinfo_proc *, int), KINFO *ki, char 495 *comm, int maxlen) 496 { 497 char *s; 498 499 if ((s = 500 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 501 err(1, NULL); 502 return (s); 503 } 504 505 #define UREADOK(ki) (forceuread || (KI_PROC(ki)->p_flag & P_INMEM)) 506 507 static void 508 saveuser(KINFO *ki) 509 { 510 struct usave *usp; 511 512 usp = &ki->ki_u; 513 514 if (KI_PROC(ki)->p_flag & P_INMEM) { 515 /* 516 * The u-area might be swapped out, and we can't get 517 * at it because we have a crashdump and no swap. 518 * If it's here fill in these fields, otherwise, just 519 * leave them 0. 520 */ 521 usp->u_start = KI_EPROC(ki)->e_stats.p_start; 522 usp->u_ru = KI_EPROC(ki)->e_stats.p_ru; 523 usp->u_cru = KI_EPROC(ki)->e_stats.p_cru; 524 usp->u_valid = 1; 525 } else 526 usp->u_valid = 0; 527 /* 528 * save arguments if needed 529 */ 530 if (needcomm && (UREADOK(ki) || (KI_PROC(ki)->p_args != NULL))) { 531 ki->ki_args = fmt(kvm_getargv, ki, KI_THREAD(ki)->td_comm, 532 MAXCOMLEN); 533 } else if (needcomm) { 534 ki->ki_args = malloc(strlen(KI_THREAD(ki)->td_comm) + 3); 535 sprintf(ki->ki_args, "(%s)", KI_THREAD(ki)->td_comm); 536 } else { 537 ki->ki_args = NULL; 538 } 539 if (needenv && UREADOK(ki)) { 540 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 541 } else if (needenv) { 542 ki->ki_env = malloc(3); 543 strcpy(ki->ki_env, "()"); 544 } else { 545 ki->ki_env = NULL; 546 } 547 } 548 549 static int 550 pscomp(const void *a, const void *b) 551 { 552 int i; 553 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 554 KI_EPROC(k)->e_vm.vm_tsize) 555 556 if (sortby == SORTCPU) 557 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 558 if (sortby == SORTMEM) 559 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 560 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 561 if (i == 0) 562 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 563 return (i); 564 } 565 566 /* 567 * ICK (all for getopt), would rather hide the ugliness 568 * here than taint the main code. 569 * 570 * ps foo -> ps -foo 571 * ps 34 -> ps -p34 572 * 573 * The old convention that 't' with no trailing tty arg means the users 574 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 575 * feature is available with the option 'T', which takes no argument. 576 */ 577 static char * 578 kludge_oldps_options(char *s) 579 { 580 size_t len; 581 char *newopts, *ns, *cp; 582 583 len = strlen(s); 584 if ((newopts = ns = malloc(len + 2)) == NULL) 585 err(1, NULL); 586 /* 587 * options begin with '-' 588 */ 589 if (*s != '-') 590 *ns++ = '-'; /* add option flag */ 591 /* 592 * gaze to end of argv[1] 593 */ 594 cp = s + len - 1; 595 /* 596 * if last letter is a 't' flag with no argument (in the context 597 * of the oldps options -- option string NOT starting with a '-' -- 598 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 599 * 600 * However, if a flag accepting a string argument is found in the 601 * option string, the remainder of the string is the argument to 602 * that flag; do not modify that argument. 603 */ 604 if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-') 605 *cp = 'T'; 606 else { 607 /* 608 * otherwise check for trailing number, which *may* be a 609 * pid. 610 */ 611 while (cp >= s && isdigit(*cp)) 612 --cp; 613 } 614 cp++; 615 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 616 ns += cp - s; 617 /* 618 * if there's a trailing number, and not a preceding 'p' (pid) or 619 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 620 */ 621 if (isdigit(*cp) && 622 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 623 (cp - 1 == s || cp[-2] != 't')) 624 *ns++ = 'p'; 625 (void)strcpy(ns, cp); /* and append the number */ 626 627 return (newopts); 628 } 629 630 static void 631 usage(void) 632 { 633 634 (void)fprintf(stderr, "%s\n%s\n%s\n", 635 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 636 " [-M core] [-N system]", 637 " ps [-L]"); 638 exit(1); 639 } 640