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