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 34 #ifndef lint 35 static char const copyright[] = 36 "@(#) Copyright (c) 1990, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/user.h> 50 #include <sys/time.h> 51 #include <sys/resource.h> 52 #include <sys/stat.h> 53 #include <sys/ioctl.h> 54 #include <sys/sysctl.h> 55 56 #include <ctype.h> 57 #include <err.h> 58 #include <errno.h> 59 #include <fcntl.h> 60 #include <kvm.h> 61 #include <limits.h> 62 #include <locale.h> 63 #include <nlist.h> 64 #include <paths.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <unistd.h> 69 #include <pwd.h> 70 #include <utmp.h> 71 72 #include "ps.h" 73 74 #define SEP ", \t" /* username separators */ 75 76 KINFO *kinfo; 77 struct varent *vhead, *vtail; 78 79 int eval; /* exit value */ 80 int cflag; /* -c */ 81 int rawcpu; /* -C */ 82 int sumrusage; /* -S */ 83 int termwidth; /* width of screen (0 == infinity) */ 84 int totwidth; /* calculated width of requested variables */ 85 86 static int needuser, needcomm, needenv; 87 #if defined(LAZY_PS) 88 static int forceuread=0; 89 #else 90 static int forceuread=1; 91 #endif 92 93 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 94 95 static char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int), 96 KINFO *, char *, int)); 97 static char *kludge_oldps_options __P((char *)); 98 static int pscomp __P((const void *, const void *)); 99 static void saveuser __P((KINFO *)); 100 static void scanvars __P((void)); 101 static void dynsizevars __P((KINFO *)); 102 static void sizevars __P((void)); 103 static void usage __P((void)); 104 static uid_t *getuids(const char *, int *); 105 106 char dfmt[] = "pid tt state time command"; 107 char jfmt[] = "user pid ppid pgid jobc state tt time command"; 108 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 109 char o1[] = "pid"; 110 char o2[] = "tt state time command"; 111 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 112 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 113 char Zfmt[] = "lvl"; 114 115 kvm_t *kd; 116 117 int 118 main(argc, argv) 119 int argc; 120 char *argv[]; 121 { 122 struct kinfo_proc *kp; 123 struct varent *vent; 124 struct winsize ws; 125 dev_t ttydev; 126 pid_t pid; 127 uid_t *uids; 128 int all, ch, flag, i, fmt, lineno, nentries, dropgid; 129 int prtheader, wflag, what, xflg, uid, nuids; 130 char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX]; 131 132 (void) setlocale(LC_ALL, ""); 133 134 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 135 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 136 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 137 ws.ws_col == 0) 138 termwidth = 79; 139 else 140 termwidth = ws.ws_col - 1; 141 142 if (argc > 1) 143 argv[1] = kludge_oldps_options(argv[1]); 144 145 all = fmt = prtheader = wflag = xflg = 0; 146 pid = -1; 147 nuids = 0; 148 uids = NULL; 149 ttydev = NODEV; 150 dropgid = 0; 151 memf = nlistf = swapf = _PATH_DEVNULL; 152 while ((ch = getopt(argc, argv, 153 #if defined(LAZY_PS) 154 "aCcefghjLlM:mN:O:o:p:rSTt:U:uvW:wxZ")) != -1) 155 #else 156 "aCceghjLlM:mN:O:o:p:rSTt:U:uvW:wxZ")) != -1) 157 #endif 158 switch((char)ch) { 159 case 'a': 160 all = 1; 161 break; 162 case 'C': 163 rawcpu = 1; 164 break; 165 case 'c': 166 cflag = 1; 167 break; 168 case 'e': /* XXX set ufmt */ 169 needenv = 1; 170 break; 171 case 'g': 172 break; /* no-op */ 173 case 'h': 174 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 175 break; 176 case 'j': 177 parsefmt(jfmt); 178 fmt = 1; 179 jfmt[0] = '\0'; 180 break; 181 case 'L': 182 showkey(); 183 exit(0); 184 case 'l': 185 parsefmt(lfmt); 186 fmt = 1; 187 lfmt[0] = '\0'; 188 break; 189 case 'M': 190 memf = optarg; 191 dropgid = 1; 192 break; 193 case 'm': 194 sortby = SORTMEM; 195 break; 196 case 'N': 197 nlistf = optarg; 198 dropgid = 1; 199 break; 200 case 'O': 201 parsefmt(o1); 202 parsefmt(optarg); 203 parsefmt(o2); 204 o1[0] = o2[0] = '\0'; 205 fmt = 1; 206 break; 207 case 'o': 208 parsefmt(optarg); 209 fmt = 1; 210 break; 211 #if defined(LAZY_PS) 212 case 'f': 213 if (getuid() == 0 || getgid() == 0) 214 forceuread = 1; 215 break; 216 #endif 217 case 'p': 218 pid = atol(optarg); 219 xflg = 1; 220 break; 221 case 'r': 222 sortby = SORTCPU; 223 break; 224 case 'S': 225 sumrusage = 1; 226 break; 227 case 'T': 228 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 229 errx(1, "stdin: not a terminal"); 230 /* FALLTHROUGH */ 231 case 't': { 232 struct stat sb; 233 char *ttypath, pathbuf[PATH_MAX]; 234 235 if (strcmp(optarg, "co") == 0) 236 ttypath = _PATH_CONSOLE; 237 else if (*optarg != '/') 238 (void)snprintf(ttypath = pathbuf, 239 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 240 else 241 ttypath = optarg; 242 if (stat(ttypath, &sb) == -1) 243 err(1, "%s", ttypath); 244 if (!S_ISCHR(sb.st_mode)) 245 errx(1, "%s: not a terminal", ttypath); 246 ttydev = sb.st_rdev; 247 break; 248 } 249 case 'U': 250 uids = getuids(optarg, &nuids); 251 xflg++; /* XXX: intuitive? */ 252 break; 253 case 'u': 254 parsefmt(ufmt); 255 sortby = SORTCPU; 256 fmt = 1; 257 ufmt[0] = '\0'; 258 break; 259 case 'v': 260 parsefmt(vfmt); 261 sortby = SORTMEM; 262 fmt = 1; 263 vfmt[0] = '\0'; 264 break; 265 case 'W': 266 swapf = optarg; 267 dropgid = 1; 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 'Z': 280 parsefmt(Zfmt); 281 Zfmt[0] = '\0'; 282 break; 283 case '?': 284 default: 285 usage(); 286 } 287 argc -= optind; 288 argv += optind; 289 290 #define BACKWARD_COMPATIBILITY 291 #ifdef BACKWARD_COMPATIBILITY 292 if (*argv) { 293 nlistf = *argv; 294 if (*++argv) { 295 memf = *argv; 296 if (*++argv) 297 swapf = *argv; 298 } 299 } 300 #endif 301 /* 302 * Discard setgid privileges if not the running kernel so that bad 303 * guys can't print interesting stuff from kernel memory. 304 */ 305 if (dropgid) { 306 setgid(getgid()); 307 setuid(getuid()); 308 } 309 310 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 311 if (kd == 0) 312 errx(1, "%s", errbuf); 313 314 if (!fmt) 315 parsefmt(dfmt); 316 317 /* XXX - should be cleaner */ 318 if (!all && ttydev == NODEV && pid == -1 && !nuids) { 319 if ((uids = malloc(sizeof (*uids))) == NULL) 320 errx(1, "malloc: %s", strerror(errno)); 321 nuids = 1; 322 *uids = getuid(); 323 } 324 325 /* 326 * scan requested variables, noting what structures are needed, 327 * and adjusting header widths as appropriate. 328 */ 329 scanvars(); 330 /* 331 * get proc list 332 */ 333 if (nuids == 1) { 334 what = KERN_PROC_UID; 335 flag = *uids; 336 } else if (ttydev != NODEV) { 337 what = KERN_PROC_TTY; 338 flag = ttydev; 339 } else if (pid != -1) { 340 what = KERN_PROC_PID; 341 flag = pid; 342 } else { 343 what = KERN_PROC_ALL; 344 flag = 0; 345 } 346 /* 347 * select procs 348 */ 349 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0 || nentries < 0) 350 errx(1, "%s", kvm_geterr(kd)); 351 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 352 err(1, NULL); 353 for (i = nentries; --i >= 0; ++kp) { 354 kinfo[i].ki_p = kp; 355 if (needuser) 356 saveuser(&kinfo[i]); 357 dynsizevars(&kinfo[i]); 358 } 359 360 sizevars(); 361 362 /* 363 * print header 364 */ 365 printheader(); 366 if (nentries == 0) 367 exit(1); 368 /* 369 * sort proc list 370 */ 371 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 372 /* 373 * for each proc, call each variable output function. 374 */ 375 for (i = lineno = 0; i < nentries; i++) { 376 if (xflg == 0 && ((&kinfo[i])->ki_p->ki_tdev == NODEV || 377 ((&kinfo[i])->ki_p->ki_flag & P_CONTROLT ) == 0)) 378 continue; 379 if (nuids > 1) { 380 for (uid = 0; uid < nuids; uid++) 381 if ((&kinfo[i])->ki_p->ki_uid == uids[uid]) 382 break; 383 if (uid == nuids) 384 continue; 385 } 386 for (vent = vhead; vent; vent = vent->next) { 387 (vent->var->oproc)(&kinfo[i], vent); 388 if (vent->next != NULL) 389 (void)putchar(' '); 390 } 391 (void)putchar('\n'); 392 if (prtheader && lineno++ == prtheader - 4) { 393 (void)putchar('\n'); 394 printheader(); 395 lineno = 0; 396 } 397 } 398 free(uids); 399 lomac_stop(); 400 401 exit(eval); 402 } 403 404 uid_t * 405 getuids(const char *arg, int *nuids) 406 { 407 char name[UT_NAMESIZE + 1]; 408 struct passwd *pwd; 409 uid_t *uids, *moreuids; 410 int l, alloc; 411 412 413 alloc = 0; 414 *nuids = 0; 415 uids = NULL; 416 for (; (l = strcspn(arg, SEP)) > 0; arg += l + strspn(arg + l, SEP)) { 417 if (l >= sizeof name) { 418 warnx("%.*s: name too long", l, arg); 419 continue; 420 } 421 strncpy(name, arg, l); 422 name[l] = '\0'; 423 if ((pwd = getpwnam(name)) == NULL) { 424 warnx("%s: no such user", name); 425 continue; 426 } 427 if (*nuids >= alloc) { 428 alloc = (alloc + 1) << 1; 429 moreuids = realloc(uids, alloc * sizeof (*uids)); 430 if (moreuids == NULL) { 431 free(uids); 432 errx(1, "realloc: %s", strerror(errno)); 433 } 434 uids = moreuids; 435 } 436 uids[(*nuids)++] = pwd->pw_uid; 437 } 438 endpwent(); 439 440 if (!*nuids) 441 errx(1, "No users specified"); 442 443 return uids; 444 } 445 446 static void 447 scanvars() 448 { 449 struct varent *vent; 450 VAR *v; 451 452 for (vent = vhead; vent; vent = vent->next) { 453 v = vent->var; 454 if (v->flag & DSIZ) { 455 v->dwidth = v->width; 456 v->width = 0; 457 } 458 if (v->flag & USER) 459 needuser = 1; 460 if (v->flag & COMM) 461 needcomm = 1; 462 } 463 } 464 465 static void 466 dynsizevars(ki) 467 KINFO *ki; 468 { 469 struct varent *vent; 470 VAR *v; 471 int i; 472 473 for (vent = vhead; vent; vent = vent->next) { 474 v = vent->var; 475 if (!(v->flag & DSIZ)) 476 continue; 477 i = (v->sproc)( ki); 478 if (v->width < i) 479 v->width = i; 480 if (v->width > v->dwidth) 481 v->width = v->dwidth; 482 } 483 } 484 485 static void 486 sizevars() 487 { 488 struct varent *vent; 489 VAR *v; 490 int i; 491 492 for (vent = vhead; vent; vent = vent->next) { 493 v = vent->var; 494 i = strlen(v->header); 495 if (v->width < i) 496 v->width = i; 497 totwidth += v->width + 1; /* +1 for space */ 498 } 499 totwidth--; 500 } 501 502 static char * 503 fmt(fn, ki, comm, maxlen) 504 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 505 KINFO *ki; 506 char *comm; 507 int maxlen; 508 { 509 char *s; 510 511 if ((s = 512 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 513 err(1, NULL); 514 return (s); 515 } 516 517 #define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM)) 518 519 static void 520 saveuser(ki) 521 KINFO *ki; 522 { 523 524 if (ki->ki_p->ki_sflag & PS_INMEM) { 525 /* 526 * The u-area might be swapped out, and we can't get 527 * at it because we have a crashdump and no swap. 528 * If it's here fill in these fields, otherwise, just 529 * leave them 0. 530 */ 531 ki->ki_valid = 1; 532 } else 533 ki->ki_valid = 0; 534 /* 535 * save arguments if needed 536 */ 537 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 538 ki->ki_args = fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 539 MAXCOMLEN); 540 } else if (needcomm) { 541 ki->ki_args = malloc(strlen(ki->ki_p->ki_comm) + 3); 542 sprintf(ki->ki_args, "(%s)", ki->ki_p->ki_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) ((k)->ki_p->ki_dsize + (k)->ki_p->ki_ssize + \ 562 (k)->ki_p->ki_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 = ((KINFO *)a)->ki_p->ki_tdev - ((KINFO *)b)->ki_p->ki_tdev; 569 if (i == 0) 570 i = ((KINFO *)a)->ki_p->ki_pid - ((KINFO *)b)->ki_p->ki_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, "MNOoUW") == 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] [-W swap]", 646 " ps [-L]"); 647 exit(1); 648 } 649