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 1.10 2004/07/29 09:20:39 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:uvwxyY" 81 #else 82 static int forceuread=1; 83 #define PS_ARGS "aCceghjLlM:mN:O:o:p:rSTt:U:uvwxyY" 84 #endif 85 86 enum sort { DEFAULT, SORTMEM, SORTCPU, SORTIAC } sortby = DEFAULT; 87 88 static const char *getfmt (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 struct timeval btime; 100 static size_t btime_size = sizeof(struct timeval); 101 102 static char dfmt[] = "pid tt state time command"; 103 static char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 104 static char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 105 static char o1[] = "pid"; 106 static char o2[] = "tt state time command"; 107 static char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 108 static char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 109 static char yfmt[] = "uid pid ppid cpu pri iac nice wchan state tt time command"; 110 111 kvm_t *kd; 112 113 int 114 main(int argc, char **argv) 115 { 116 struct kinfo_proc *kp; 117 struct varent *vent; 118 struct winsize ws; 119 dev_t ttydev; 120 pid_t pid; 121 uid_t *uids; 122 int all, ch, flag, i, fmt, lineno, nentries, nocludge, dropgid; 123 int prtheader, wflag, what, xflg, uid, nuids; 124 char errbuf[_POSIX2_LINE_MAX]; 125 const char *cp, *nlistf, *memf; 126 127 (void) setlocale(LC_ALL, ""); 128 129 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 130 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 131 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 132 ws.ws_col == 0) 133 termwidth = 79; 134 else 135 termwidth = ws.ws_col - 1; 136 137 /* 138 * Don't apply a kludge if the first argument is an option taking an 139 * argument 140 */ 141 if (argc > 1) { 142 nocludge = 0; 143 if (argv[1][0] == '-') { 144 for (cp = PS_ARGS; *cp != '\0'; cp++) { 145 if (*cp != ':') 146 continue; 147 if (*(cp - 1) == argv[1][1]) { 148 nocludge = 1; 149 break; 150 } 151 } 152 } 153 if (nocludge == 0) 154 argv[1] = kludge_oldps_options(argv[1]); 155 } 156 157 all = fmt = prtheader = wflag = xflg = 0; 158 pid = -1; 159 nuids = 0; 160 uids = NULL; 161 ttydev = NODEV; 162 dropgid = 0; 163 memf = nlistf = _PATH_DEVNULL; 164 while ((ch = getopt(argc, argv, PS_ARGS)) != -1) 165 switch((char)ch) { 166 case 'a': 167 all = 1; 168 break; 169 case 'C': 170 rawcpu = 1; 171 break; 172 case 'c': 173 cflag = 1; 174 break; 175 case 'e': /* XXX set ufmt */ 176 needenv = 1; 177 break; 178 case 'g': 179 break; /* no-op */ 180 case 'h': 181 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 182 break; 183 case 'j': 184 parsefmt(jfmt); 185 fmt = 1; 186 jfmt[0] = '\0'; 187 break; 188 case 'L': 189 showkey(); 190 exit(0); 191 case 'l': 192 parsefmt(lfmt); 193 fmt = 1; 194 lfmt[0] = '\0'; 195 break; 196 case 'M': 197 memf = optarg; 198 dropgid = 1; 199 break; 200 case 'm': 201 sortby = SORTMEM; 202 break; 203 case 'N': 204 nlistf = optarg; 205 dropgid = 1; 206 break; 207 case 'O': 208 parsefmt(o1); 209 parsefmt(optarg); 210 parsefmt(o2); 211 o1[0] = o2[0] = '\0'; 212 fmt = 1; 213 break; 214 case 'o': 215 parsefmt(optarg); 216 fmt = 1; 217 break; 218 #if defined(LAZY_PS) 219 case 'f': 220 if (getuid() == 0 || getgid() == 0) 221 forceuread = 1; 222 break; 223 #endif 224 case 'p': 225 pid = atol(optarg); 226 xflg = 1; 227 break; 228 case 'r': 229 sortby = SORTCPU; 230 break; 231 case 'S': 232 sumrusage = 1; 233 break; 234 case 'T': 235 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 236 errx(1, "stdin: not a terminal"); 237 /* FALLTHROUGH */ 238 case 't': { 239 struct stat sb; 240 char pathbuf[PATH_MAX]; 241 const char *ttypath; 242 243 if (strcmp(optarg, "co") == 0) 244 ttypath = _PATH_CONSOLE; 245 else if (*optarg != '/') { 246 snprintf(pathbuf, 247 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 248 ttypath = pathbuf; 249 } else 250 ttypath = optarg; 251 if (stat(ttypath, &sb) == -1) 252 err(1, "%s", ttypath); 253 if (!S_ISCHR(sb.st_mode)) 254 errx(1, "%s: not a terminal", ttypath); 255 ttydev = sb.st_rdev; 256 break; 257 } 258 case 'U': 259 uids = getuids(optarg, &nuids); 260 xflg++; /* XXX: intuitive? */ 261 break; 262 case 'u': 263 parsefmt(ufmt); 264 sortby = SORTCPU; 265 fmt = 1; 266 ufmt[0] = '\0'; 267 break; 268 case 'v': 269 parsefmt(vfmt); 270 sortby = SORTMEM; 271 fmt = 1; 272 vfmt[0] = '\0'; 273 break; 274 case 'w': 275 if (wflag) 276 termwidth = UNLIMITED; 277 else if (termwidth < 131) 278 termwidth = 131; 279 wflag++; 280 break; 281 case 'x': 282 xflg = 1; 283 break; 284 case 'y': 285 parsefmt(yfmt); 286 fmt = 1; 287 yfmt[0] = '\0'; 288 /* fall through */ 289 case 'Y': 290 sortby = SORTIAC; 291 break; 292 case '?': 293 default: 294 usage(); 295 } 296 argc -= optind; 297 argv += optind; 298 299 #define BACKWARD_COMPATIBILITY 300 #ifdef BACKWARD_COMPATIBILITY 301 if (*argv) { 302 nlistf = *argv; 303 if (*++argv) { 304 memf = *argv; 305 } 306 } 307 #endif 308 /* 309 * Discard setgid privileges if not the running kernel so that bad 310 * guys can't print interesting stuff from kernel memory. 311 */ 312 if (dropgid) { 313 setgid(getgid()); 314 setuid(getuid()); 315 } 316 317 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 318 if (kd == 0) 319 errx(1, "%s", errbuf); 320 321 if (!fmt) 322 parsefmt(dfmt); 323 324 /* XXX - should be cleaner */ 325 if (!all && ttydev == NODEV && pid == -1 && !nuids) { 326 if ((uids = malloc(sizeof (*uids))) == NULL) 327 errx(1, "malloc: %s", strerror(errno)); 328 nuids = 1; 329 *uids = getuid(); 330 } 331 332 /* 333 * scan requested variables, noting what structures are needed, 334 * and adjusting header widths as appropriate. 335 */ 336 scanvars(); 337 338 /* 339 * Get boot time 340 */ 341 if (sysctlbyname("kern.boottime", &btime, &btime_size, NULL, 0) < 0) { 342 perror("sysctl: kern.boottime"); 343 exit(EXIT_FAILURE); 344 } 345 346 /* 347 * get proc list 348 */ 349 if (nuids == 1) { 350 what = KERN_PROC_UID; 351 flag = *uids; 352 } else if (ttydev != NODEV) { 353 what = KERN_PROC_TTY; 354 flag = ttydev; 355 } else if (pid != -1) { 356 what = KERN_PROC_PID; 357 flag = pid; 358 } else { 359 what = KERN_PROC_ALL; 360 flag = 0; 361 } 362 /* 363 * select procs 364 */ 365 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == NULL) 366 errx(1, "%s", kvm_geterr(kd)); 367 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 368 err(1, NULL); 369 for (i = nentries; --i >= 0; ++kp) { 370 kinfo[i].ki_p = kp; 371 if (needuser) 372 saveuser(&kinfo[i]); 373 dynsizevars(&kinfo[i]); 374 } 375 376 sizevars(); 377 378 /* 379 * print header 380 */ 381 printheader(); 382 if (nentries == 0) 383 exit(1); 384 /* 385 * sort proc list 386 */ 387 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 388 /* 389 * for each proc, call each variable output function. 390 */ 391 for (i = lineno = 0; i < nentries; i++) { 392 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 393 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 394 continue; 395 if (nuids > 1) { 396 for (uid = 0; uid < nuids; uid++) 397 if (KI_EPROC(&kinfo[i])->e_ucred.cr_uid == 398 uids[uid]) 399 break; 400 if (uid == nuids) 401 continue; 402 } 403 for (vent = vhead; vent; vent = vent->next) { 404 (vent->var->oproc)(&kinfo[i], vent); 405 if (vent->next != NULL) 406 (void)putchar(' '); 407 } 408 (void)putchar('\n'); 409 if (prtheader && lineno++ == prtheader - 4) { 410 (void)putchar('\n'); 411 printheader(); 412 lineno = 0; 413 } 414 } 415 free(uids); 416 417 exit(eval); 418 } 419 420 uid_t * 421 getuids(const char *arg, int *nuids) 422 { 423 char name[UT_NAMESIZE + 1]; 424 struct passwd *pwd; 425 uid_t *uids, *moreuids; 426 size_t l; 427 int alloc; 428 429 430 alloc = 0; 431 *nuids = 0; 432 uids = NULL; 433 for (; (l = strcspn(arg, SEP)) > 0; arg += l + strspn(arg + l, SEP)) { 434 if (l >= sizeof name) { 435 warnx("%.*s: name too long", (int)l, arg); 436 continue; 437 } 438 strncpy(name, arg, l); 439 name[l] = '\0'; 440 if ((pwd = getpwnam(name)) == NULL) { 441 warnx("%s: no such user", name); 442 continue; 443 } 444 if (*nuids >= alloc) { 445 alloc = (alloc + 1) << 1; 446 moreuids = realloc(uids, alloc * sizeof (*uids)); 447 if (moreuids == NULL) { 448 free(uids); 449 errx(1, "realloc: %s", strerror(errno)); 450 } 451 uids = moreuids; 452 } 453 uids[(*nuids)++] = pwd->pw_uid; 454 } 455 endpwent(); 456 457 if (!*nuids) 458 errx(1, "No users specified"); 459 460 return uids; 461 } 462 463 static void 464 scanvars(void) 465 { 466 struct varent *vent; 467 VAR *v; 468 469 for (vent = vhead; vent; vent = vent->next) { 470 v = vent->var; 471 if (v->flag & DSIZ) { 472 v->dwidth = v->width; 473 v->width = 0; 474 } 475 if (v->flag & USER) 476 needuser = 1; 477 if (v->flag & COMM) 478 needcomm = 1; 479 } 480 } 481 482 static void 483 dynsizevars(KINFO *ki) 484 { 485 struct varent *vent; 486 VAR *v; 487 int i; 488 489 for (vent = vhead; vent; vent = vent->next) { 490 v = vent->var; 491 if (!(v->flag & DSIZ)) 492 continue; 493 i = (v->sproc)( ki); 494 if (v->width < i) 495 v->width = i; 496 if (v->width > v->dwidth) 497 v->width = v->dwidth; 498 } 499 } 500 501 static void 502 sizevars(void) 503 { 504 struct varent *vent; 505 VAR *v; 506 int i; 507 508 for (vent = vhead; vent; vent = vent->next) { 509 v = vent->var; 510 i = strlen(v->header); 511 if (v->width < i) 512 v->width = i; 513 totwidth += v->width + 1; /* +1 for space */ 514 } 515 totwidth--; 516 } 517 518 static const char * 519 getfmt(char **(*fn) (kvm_t *, const struct kinfo_proc *, int), KINFO *ki, char 520 *comm, int maxlen) 521 { 522 const char *s; 523 524 if ((s = 525 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 526 err(1, NULL); 527 return (s); 528 } 529 530 #define UREADOK(ki) (forceuread || (KI_PROC(ki)->p_flag & P_INMEM)) 531 532 static void 533 saveuser(KINFO *ki) 534 { 535 struct usave *usp; 536 537 usp = &ki->ki_u; 538 539 if (KI_PROC(ki)->p_flag & P_INMEM) { 540 /* 541 * The u-area might be swapped out, and we can't get 542 * at it because we have a crashdump and no swap. 543 * If it's here fill in these fields, otherwise, just 544 * leave them 0. 545 */ 546 usp->u_start = KI_THREAD(ki)->td_start; 547 usp->u_ru = KI_EPROC(ki)->e_stats.p_ru; 548 usp->u_cru = KI_EPROC(ki)->e_stats.p_cru; 549 usp->u_valid = 1; 550 } else 551 usp->u_valid = 0; 552 /* 553 * save arguments if needed 554 */ 555 if (needcomm && (UREADOK(ki) || (KI_PROC(ki)->p_args != NULL))) { 556 ki->ki_args = getfmt(kvm_getargv, ki, KI_THREAD(ki)->td_comm, 557 MAXCOMLEN); 558 } else if (needcomm) { 559 char *tmp; 560 tmp = malloc(strlen(KI_THREAD(ki)->td_comm) + 3); 561 sprintf(tmp, "(%s)", KI_THREAD(ki)->td_comm); 562 ki->ki_args = tmp; 563 } else { 564 ki->ki_args = NULL; 565 } 566 if (needenv && UREADOK(ki)) { 567 ki->ki_env = getfmt(kvm_getenvv, ki, (char *)NULL, 0); 568 } else if (needenv) { 569 ki->ki_env = "()"; 570 } else { 571 ki->ki_env = NULL; 572 } 573 } 574 575 static int 576 pscomp(const void *a, const void *b) 577 { 578 int i; 579 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 580 KI_EPROC(k)->e_vm.vm_tsize) 581 582 if (sortby == SORTIAC) 583 return (KI_PROC((const KINFO *)a)->p_interactive - KI_PROC((const KINFO *)b)->p_interactive); 584 if (sortby == SORTCPU) 585 return (getpcpu((const KINFO *)b) - getpcpu((const KINFO *)a)); 586 if (sortby == SORTMEM) 587 return (VSIZE((const KINFO *)b) - VSIZE((const KINFO *)a)); 588 i = KI_EPROC((const KINFO *)a)->e_tdev - KI_EPROC((const KINFO *)b)->e_tdev; 589 if (i == 0) 590 i = KI_PROC((const KINFO *)a)->p_pid - KI_PROC((const KINFO *)b)->p_pid; 591 return (i); 592 } 593 594 /* 595 * ICK (all for getopt), would rather hide the ugliness 596 * here than taint the main code. 597 * 598 * ps foo -> ps -foo 599 * ps 34 -> ps -p34 600 * 601 * The old convention that 't' with no trailing tty arg means the users 602 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 603 * feature is available with the option 'T', which takes no argument. 604 */ 605 static char * 606 kludge_oldps_options(char *s) 607 { 608 size_t len; 609 char *newopts, *ns, *cp; 610 611 len = strlen(s); 612 if ((newopts = ns = malloc(len + 2)) == NULL) 613 err(1, NULL); 614 /* 615 * options begin with '-' 616 */ 617 if (*s != '-') 618 *ns++ = '-'; /* add option flag */ 619 /* 620 * gaze to end of argv[1] 621 */ 622 cp = s + len - 1; 623 /* 624 * if last letter is a 't' flag with no argument (in the context 625 * of the oldps options -- option string NOT starting with a '-' -- 626 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 627 * 628 * However, if a flag accepting a string argument is found in the 629 * option string, the remainder of the string is the argument to 630 * that flag; do not modify that argument. 631 */ 632 if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-') 633 *cp = 'T'; 634 else { 635 /* 636 * otherwise check for trailing number, which *may* be a 637 * pid. 638 */ 639 while (cp >= s && isdigit(*cp)) 640 --cp; 641 } 642 cp++; 643 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 644 ns += cp - s; 645 /* 646 * if there's a trailing number, and not a preceding 'p' (pid) or 647 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 648 */ 649 if (isdigit(*cp) && 650 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 651 (cp - 1 == s || cp[-2] != 't')) 652 *ns++ = 'p'; 653 (void)strcpy(ns, cp); /* and append the number */ 654 655 return (newopts); 656 } 657 658 static void 659 usage(void) 660 { 661 662 (void)fprintf(stderr, "%s\n%s\n%s\n", 663 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 664 " [-M core] [-N system]", 665 " ps [-L]"); 666 exit(1); 667 } 668