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 1.22 2007/02/01 10:33:25 corecode Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/user.h> 41 #include <sys/time.h> 42 #include <sys/queue.h> 43 #include <sys/resource.h> 44 #include <sys/stat.h> 45 #include <sys/ioctl.h> 46 #include <sys/sysctl.h> 47 48 #include <ctype.h> 49 #include <err.h> 50 #include <errno.h> 51 #include <fcntl.h> 52 #include <kvm.h> 53 #include <limits.h> 54 #include <locale.h> 55 #include <nlist.h> 56 #include <paths.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 #include <pwd.h> 62 #include <utmp.h> 63 64 #include "ps.h" 65 66 #define SEP ", \t" /* username separators */ 67 68 KINFO *kinfo; 69 struct varent *vhead, *vtail; 70 71 int eval; /* exit value */ 72 int cflag; /* -c */ 73 int rawcpu; /* -C */ 74 int sumrusage; /* -S */ 75 int termwidth; /* width of screen (0 == infinity) */ 76 int totwidth; /* calculated width of requested variables */ 77 int numcpus; /* hw.ncpu */ 78 79 static int needuser, needcomm, needenv; 80 #if defined(LAZY_PS) 81 static int forceuread=0; 82 #define PS_ARGS "aCcefghjLlM:mN:O:o:p:rSTt:U:uvwx" 83 #else 84 static int forceuread=1; 85 #define PS_ARGS "aCceghjLlM:mN:O:o:p:rSTt:U:uvwx" 86 #endif 87 88 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 89 90 static const char *getfmt (char **(*)(kvm_t *, const struct kinfo_proc *, int), 91 KINFO *, char *, int); 92 static char *kludge_oldps_options (char *); 93 static int pscomp (const void *, const void *); 94 static void saveuser (KINFO *); 95 static void scanvars (void); 96 static void dynsizevars (KINFO *); 97 static void sizevars (void); 98 static void usage (void); 99 static uid_t *getuids(const char *, int *); 100 101 struct timeval btime; 102 103 static char dfmt[] = "pid tt state time command"; 104 static char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 105 static char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 106 static char o1[] = "pid"; 107 static char o2[] = "tt state time command"; 108 static char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 109 static char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem 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 size_t btime_size = sizeof(struct timeval); 127 size_t numcpus_size = sizeof(numcpus); 128 129 setlocale(LC_ALL, ""); 130 131 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 132 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 133 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 134 ws.ws_col == 0) 135 termwidth = 79; 136 else 137 termwidth = ws.ws_col - 1; 138 139 /* 140 * Don't apply a kludge if the first argument is an option taking an 141 * argument 142 */ 143 if (argc > 1) { 144 nocludge = 0; 145 if (argv[1][0] == '-') { 146 for (cp = PS_ARGS; *cp != '\0'; cp++) { 147 if (*cp != ':') 148 continue; 149 if (*(cp - 1) == argv[1][1]) { 150 nocludge = 1; 151 break; 152 } 153 } 154 } 155 if (nocludge == 0) 156 argv[1] = kludge_oldps_options(argv[1]); 157 } 158 159 all = fmt = prtheader = wflag = xflg = 0; 160 pid = -1; 161 nuids = 0; 162 uids = NULL; 163 ttydev = NODEV; 164 dropgid = 0; 165 memf = nlistf = _PATH_DEVNULL; 166 while ((ch = getopt(argc, argv, PS_ARGS)) != -1) 167 switch((char)ch) { 168 case 'a': 169 all = 1; 170 break; 171 case 'C': 172 rawcpu = 1; 173 break; 174 case 'c': 175 cflag = 1; 176 break; 177 case 'e': /* XXX set ufmt */ 178 needenv = 1; 179 break; 180 case 'g': 181 break; /* no-op */ 182 case 'h': 183 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 184 break; 185 case 'j': 186 parsefmt(jfmt); 187 fmt = 1; 188 jfmt[0] = '\0'; 189 break; 190 case 'L': 191 showkey(); 192 exit(0); 193 case 'l': 194 parsefmt(lfmt); 195 fmt = 1; 196 lfmt[0] = '\0'; 197 break; 198 case 'M': 199 memf = optarg; 200 dropgid = 1; 201 break; 202 case 'm': 203 sortby = SORTMEM; 204 break; 205 case 'N': 206 nlistf = optarg; 207 dropgid = 1; 208 break; 209 case 'O': 210 parsefmt(o1); 211 parsefmt(optarg); 212 parsefmt(o2); 213 o1[0] = o2[0] = '\0'; 214 fmt = 1; 215 break; 216 case 'o': 217 parsefmt(optarg); 218 fmt = 1; 219 break; 220 #if defined(LAZY_PS) 221 case 'f': 222 if (getuid() == 0 || getgid() == 0) 223 forceuread = 1; 224 break; 225 #endif 226 case 'p': 227 pid = atol(optarg); 228 xflg = 1; 229 break; 230 case 'r': 231 sortby = SORTCPU; 232 break; 233 case 'S': 234 sumrusage = 1; 235 break; 236 case 'T': 237 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 238 errx(1, "stdin: not a terminal"); 239 /* FALLTHROUGH */ 240 case 't': { 241 struct stat sb; 242 char pathbuf[PATH_MAX]; 243 const char *ttypath; 244 245 if (strcmp(optarg, "co") == 0) 246 ttypath = _PATH_CONSOLE; 247 else if (*optarg != '/') { 248 snprintf(pathbuf, 249 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 250 ttypath = pathbuf; 251 } else 252 ttypath = optarg; 253 if (stat(ttypath, &sb) == -1) 254 err(1, "%s", ttypath); 255 if (!S_ISCHR(sb.st_mode)) 256 errx(1, "%s: not a terminal", ttypath); 257 ttydev = sb.st_rdev; 258 break; 259 } 260 case 'U': 261 uids = getuids(optarg, &nuids); 262 xflg++; /* XXX: intuitive? */ 263 break; 264 case 'u': 265 parsefmt(ufmt); 266 sortby = SORTCPU; 267 fmt = 1; 268 ufmt[0] = '\0'; 269 break; 270 case 'v': 271 parsefmt(vfmt); 272 sortby = SORTMEM; 273 fmt = 1; 274 vfmt[0] = '\0'; 275 break; 276 case 'w': 277 if (wflag) 278 termwidth = UNLIMITED; 279 else if (termwidth < 131) 280 termwidth = 131; 281 wflag++; 282 break; 283 case 'x': 284 xflg = 1; 285 break; 286 case '?': 287 default: 288 usage(); 289 } 290 argc -= optind; 291 argv += optind; 292 293 #define BACKWARD_COMPATIBILITY 294 #ifdef BACKWARD_COMPATIBILITY 295 if (*argv) { 296 nlistf = *argv; 297 if (*++argv) { 298 memf = *argv; 299 } 300 } 301 #endif 302 /* 303 * Discard setgid privileges if not the running kernel so that bad 304 * guys can't print interesting stuff from kernel memory. 305 */ 306 if (dropgid) { 307 setgid(getgid()); 308 setuid(getuid()); 309 } 310 311 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 312 if (kd == 0) 313 errx(1, "%s", errbuf); 314 315 if (!fmt) 316 parsefmt(dfmt); 317 318 /* XXX - should be cleaner */ 319 if (!all && ttydev == NODEV && pid == -1 && !nuids) { 320 if ((uids = malloc(sizeof (*uids))) == NULL) 321 errx(1, "malloc: %s", strerror(errno)); 322 nuids = 1; 323 *uids = getuid(); 324 } 325 326 /* 327 * scan requested variables, noting what structures are needed, 328 * and adjusting header widths as appropriate. 329 */ 330 scanvars(); 331 332 /* 333 * Get boot time 334 */ 335 if (sysctlbyname("kern.boottime", &btime, &btime_size, NULL, 0) < 0) { 336 perror("sysctl: kern.boottime"); 337 exit(EXIT_FAILURE); 338 } 339 340 /* 341 * Get number of cpus 342 */ 343 if (sysctlbyname("hw.ncpu", &numcpus, &numcpus_size, NULL, 0) < 0) 344 numcpus = 1; 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_proc = 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_PROC(&kinfo[i], tdev) == NODEV || 393 (KI_PROC(&kinfo[i], flags) & P_CONTROLT ) == 0)) 394 continue; 395 if (nuids > 1) { 396 for (uid = 0; uid < nuids; uid++) 397 if (KI_PROC(&kinfo[i], uid) == 398 uids[uid]) 399 break; 400 if (uid == nuids) 401 continue; 402 } 403 STAILQ_FOREACH(vent, &var_head, link) { 404 (vent->var->oproc)(&kinfo[i], vent); 405 if (STAILQ_NEXT(vent, link) != NULL) 406 putchar(' '); 407 } 408 putchar('\n'); 409 if (prtheader && lineno++ == prtheader - 4) { 410 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 const VAR *v; 468 469 STAILQ_FOREACH(vent, &var_head, link) { 470 v = vent->var; 471 if (v->flag & DSIZ) { 472 vent->dwidth = vent->width; 473 vent->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 const VAR *v; 487 int i; 488 489 STAILQ_FOREACH(vent, &var_head, link) { 490 v = vent->var; 491 if (!(v->flag & DSIZ)) 492 continue; 493 i = (v->sproc)( ki); 494 if (vent->width < i) 495 vent->width = i; 496 if (vent->width > vent->dwidth) 497 vent->width = vent->dwidth; 498 } 499 } 500 501 static void 502 sizevars(void) 503 { 504 struct varent *vent; 505 const VAR *v; 506 int i; 507 508 STAILQ_FOREACH(vent, &var_head, link) { 509 v = vent->var; 510 i = strlen(vent->header); 511 if (vent->width < i) 512 vent->width = i; 513 totwidth += vent->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_proc, termwidth), comm, maxlen)) == NULL) 526 err(1, NULL); 527 return (s); 528 } 529 530 static void 531 saveuser(KINFO *ki) 532 { 533 /* 534 * save arguments if needed 535 */ 536 if (needcomm) { 537 ki->ki_args = getfmt(kvm_getargv, ki, KI_PROC(ki, comm), 538 MAXCOMLEN); 539 } else { 540 ki->ki_args = NULL; 541 } 542 if (needenv) { 543 ki->ki_env = getfmt(kvm_getenvv, ki, (char *)NULL, 0); 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_PROC(k, vm_dsize) + KI_PROC(k, vm_ssize) + \ 554 KI_PROC(k, vm_tsize)) 555 556 #if 0 557 if (sortby == SORTIAC) 558 return (KI_PROC((const KINFO *)a)->p_usdata.bsd4.interactive - KI_PROC((const KINFO *)b)->p_usdata.bsd4.interactive); 559 #endif 560 if (sortby == SORTCPU) 561 return (getpcpu((const KINFO *)b) - getpcpu((const KINFO *)a)); 562 if (sortby == SORTMEM) 563 return (VSIZE((const KINFO *)b) - VSIZE((const KINFO *)a)); 564 i = KI_PROC((const KINFO *)a, tdev) - KI_PROC((const KINFO *)b, tdev); 565 if (i == 0) 566 i = KI_PROC((const KINFO *)a, pid) - KI_PROC((const KINFO *)b, pid); 567 return (i); 568 } 569 570 /* 571 * ICK (all for getopt), would rather hide the ugliness 572 * here than taint the main code. 573 * 574 * ps foo -> ps -foo 575 * ps 34 -> ps -p34 576 * 577 * The old convention that 't' with no trailing tty arg means the users 578 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 579 * feature is available with the option 'T', which takes no argument. 580 */ 581 static char * 582 kludge_oldps_options(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 strcpy(ns, cp); /* and append the number */ 630 631 return (newopts); 632 } 633 634 static void 635 usage(void) 636 { 637 638 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