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"; 113 114 kvm_t *kd; 115 116 int 117 main(argc, argv) 118 int argc; 119 char *argv[]; 120 { 121 struct kinfo_proc *kp; 122 struct varent *vent; 123 struct winsize ws; 124 dev_t ttydev; 125 pid_t pid; 126 uid_t *uids; 127 int all, ch, flag, i, fmt, lineno, nentries, dropgid; 128 int prtheader, wflag, what, xflg, uid, nuids; 129 char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX]; 130 131 (void) setlocale(LC_ALL, ""); 132 133 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 134 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 135 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 136 ws.ws_col == 0) 137 termwidth = 79; 138 else 139 termwidth = ws.ws_col - 1; 140 141 if (argc > 1) 142 argv[1] = kludge_oldps_options(argv[1]); 143 144 all = fmt = prtheader = wflag = xflg = 0; 145 pid = -1; 146 nuids = 0; 147 uids = NULL; 148 ttydev = NODEV; 149 dropgid = 0; 150 memf = nlistf = swapf = _PATH_DEVNULL; 151 while ((ch = getopt(argc, argv, 152 #if defined(LAZY_PS) 153 "aCcefghjLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1) 154 #else 155 "aCceghjLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1) 156 #endif 157 switch((char)ch) { 158 case 'a': 159 all = 1; 160 break; 161 case 'C': 162 rawcpu = 1; 163 break; 164 case 'c': 165 cflag = 1; 166 break; 167 case 'e': /* XXX set ufmt */ 168 needenv = 1; 169 break; 170 case 'g': 171 break; /* no-op */ 172 case 'h': 173 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 174 break; 175 case 'j': 176 parsefmt(jfmt); 177 fmt = 1; 178 jfmt[0] = '\0'; 179 break; 180 case 'L': 181 showkey(); 182 exit(0); 183 case 'l': 184 parsefmt(lfmt); 185 fmt = 1; 186 lfmt[0] = '\0'; 187 break; 188 case 'M': 189 memf = optarg; 190 dropgid = 1; 191 break; 192 case 'm': 193 sortby = SORTMEM; 194 break; 195 case 'N': 196 nlistf = optarg; 197 dropgid = 1; 198 break; 199 case 'O': 200 parsefmt(o1); 201 parsefmt(optarg); 202 parsefmt(o2); 203 o1[0] = o2[0] = '\0'; 204 fmt = 1; 205 break; 206 case 'o': 207 parsefmt(optarg); 208 fmt = 1; 209 break; 210 #if defined(LAZY_PS) 211 case 'f': 212 if (getuid() == 0 || getgid() == 0) 213 forceuread = 1; 214 break; 215 #endif 216 case 'p': 217 pid = atol(optarg); 218 xflg = 1; 219 break; 220 case 'r': 221 sortby = SORTCPU; 222 break; 223 case 'S': 224 sumrusage = 1; 225 break; 226 case 'T': 227 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 228 errx(1, "stdin: not a terminal"); 229 /* FALLTHROUGH */ 230 case 't': { 231 struct stat sb; 232 char *ttypath, pathbuf[PATH_MAX]; 233 234 if (strcmp(optarg, "co") == 0) 235 ttypath = _PATH_CONSOLE; 236 else if (*optarg != '/') 237 (void)snprintf(ttypath = pathbuf, 238 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 239 else 240 ttypath = optarg; 241 if (stat(ttypath, &sb) == -1) 242 err(1, "%s", ttypath); 243 if (!S_ISCHR(sb.st_mode)) 244 errx(1, "%s: not a terminal", ttypath); 245 ttydev = sb.st_rdev; 246 break; 247 } 248 case 'U': 249 uids = getuids(optarg, &nuids); 250 xflg++; /* XXX: intuitive? */ 251 break; 252 case 'u': 253 parsefmt(ufmt); 254 sortby = SORTCPU; 255 fmt = 1; 256 ufmt[0] = '\0'; 257 break; 258 case 'v': 259 parsefmt(vfmt); 260 sortby = SORTMEM; 261 fmt = 1; 262 vfmt[0] = '\0'; 263 break; 264 case 'W': 265 swapf = optarg; 266 dropgid = 1; 267 break; 268 case 'w': 269 if (wflag) 270 termwidth = UNLIMITED; 271 else if (termwidth < 131) 272 termwidth = 131; 273 wflag++; 274 break; 275 case 'x': 276 xflg = 1; 277 break; 278 case '?': 279 default: 280 usage(); 281 } 282 argc -= optind; 283 argv += optind; 284 285 #define BACKWARD_COMPATIBILITY 286 #ifdef BACKWARD_COMPATIBILITY 287 if (*argv) { 288 nlistf = *argv; 289 if (*++argv) { 290 memf = *argv; 291 if (*++argv) 292 swapf = *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, swapf, 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); 394 395 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->ki_p->ki_sflag & PS_INMEM)) 512 513 static void 514 saveuser(ki) 515 KINFO *ki; 516 { 517 518 if (ki->ki_p->ki_sflag & PS_INMEM) { 519 /* 520 * The u-area might be swapped out, and we can't get 521 * at it because we have a crashdump and no swap. 522 * If it's here fill in these fields, otherwise, just 523 * leave them 0. 524 */ 525 ki->ki_valid = 1; 526 } else 527 ki->ki_valid = 0; 528 /* 529 * save arguments if needed 530 */ 531 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 532 ki->ki_args = fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 533 MAXCOMLEN); 534 } else if (needcomm) { 535 ki->ki_args = malloc(strlen(ki->ki_p->ki_comm) + 3); 536 sprintf(ki->ki_args, "(%s)", ki->ki_p->ki_comm); 537 } else { 538 ki->ki_args = NULL; 539 } 540 if (needenv && UREADOK(ki)) { 541 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 542 } else if (needenv) { 543 ki->ki_env = malloc(3); 544 strcpy(ki->ki_env, "()"); 545 } else { 546 ki->ki_env = NULL; 547 } 548 } 549 550 static int 551 pscomp(a, b) 552 const void *a, *b; 553 { 554 int i; 555 #define VSIZE(k) ((k)->ki_p->ki_dsize + (k)->ki_p->ki_ssize + \ 556 (k)->ki_p->ki_tsize) 557 558 if (sortby == SORTCPU) 559 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 560 if (sortby == SORTMEM) 561 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 562 i = ((KINFO *)a)->ki_p->ki_tdev - ((KINFO *)b)->ki_p->ki_tdev; 563 if (i == 0) 564 i = ((KINFO *)a)->ki_p->ki_pid - ((KINFO *)b)->ki_p->ki_pid; 565 return (i); 566 } 567 568 /* 569 * ICK (all for getopt), would rather hide the ugliness 570 * here than taint the main code. 571 * 572 * ps foo -> ps -foo 573 * ps 34 -> ps -p34 574 * 575 * The old convention that 't' with no trailing tty arg means the users 576 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 577 * feature is available with the option 'T', which takes no argument. 578 */ 579 static char * 580 kludge_oldps_options(s) 581 char *s; 582 { 583 size_t len; 584 char *newopts, *ns, *cp; 585 586 len = strlen(s); 587 if ((newopts = ns = malloc(len + 2)) == NULL) 588 err(1, NULL); 589 /* 590 * options begin with '-' 591 */ 592 if (*s != '-') 593 *ns++ = '-'; /* add option flag */ 594 /* 595 * gaze to end of argv[1] 596 */ 597 cp = s + len - 1; 598 /* 599 * if last letter is a 't' flag with no argument (in the context 600 * of the oldps options -- option string NOT starting with a '-' -- 601 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 602 * 603 * However, if a flag accepting a string argument is found in the 604 * option string, the remainder of the string is the argument to 605 * that flag; do not modify that argument. 606 */ 607 if (strcspn(s, "MNOoUW") == len && *cp == 't' && *s != '-') 608 *cp = 'T'; 609 else { 610 /* 611 * otherwise check for trailing number, which *may* be a 612 * pid. 613 */ 614 while (cp >= s && isdigit(*cp)) 615 --cp; 616 } 617 cp++; 618 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 619 ns += cp - s; 620 /* 621 * if there's a trailing number, and not a preceding 'p' (pid) or 622 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 623 */ 624 if (isdigit(*cp) && 625 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 626 (cp - 1 == s || cp[-2] != 't')) 627 *ns++ = 'p'; 628 (void)strcpy(ns, cp); /* and append the number */ 629 630 return (newopts); 631 } 632 633 static void 634 usage() 635 { 636 637 (void)fprintf(stderr, "%s\n%s\n%s\n", 638 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 639 " [-M core] [-N system] [-W swap]", 640 " ps [-L]"); 641 exit(1); 642 } 643