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 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #ifndef lint 38 static const char copyright[] = 39 "@(#) Copyright (c) 1990, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #if 0 44 #ifndef lint 45 static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 46 #endif /* not lint */ 47 #endif 48 49 #include <sys/param.h> 50 #include <sys/user.h> 51 #include <sys/stat.h> 52 #include <sys/ioctl.h> 53 #include <sys/sysctl.h> 54 55 #include <ctype.h> 56 #include <err.h> 57 #include <fcntl.h> 58 #include <kvm.h> 59 #include <limits.h> 60 #include <locale.h> 61 #include <paths.h> 62 #include <pwd.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 #include <utmp.h> 68 69 #include "lomac.h" 70 #include "ps.h" 71 72 #define SEP ", \t" /* username separators */ 73 74 static KINFO *kinfo; 75 struct varent *vhead; 76 77 int eval; /* exit value */ 78 int cflag; /* -c */ 79 int rawcpu; /* -C */ 80 int sumrusage; /* -S */ 81 int termwidth; /* width of screen (0 == infinity) */ 82 int totwidth; /* calculated width of requested variables */ 83 84 static int needuser, needcomm, needenv; 85 #if defined(LAZY_PS) 86 static int forceuread=0; 87 #else 88 static int forceuread=1; 89 #endif 90 91 static enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 92 93 static const char *fmt(char **(*)(kvm_t *, const struct kinfo_proc *, int), 94 KINFO *, char *, int); 95 static char *kludge_oldps_options(char *); 96 static int pscomp(const void *, const void *); 97 static void saveuser(KINFO *); 98 static void scanvars(void); 99 static void dynsizevars(KINFO *); 100 static void sizevars(void); 101 static void usage(void); 102 static uid_t *getuids(const char *, int *); 103 104 static char dfmt[] = "pid tt state time command"; 105 static char jfmt[] = "user pid ppid pgid jobc state tt time command"; 106 static char lfmt[] = "uid pid ppid cpu pri nice vsz rss mwchan state tt time command"; 107 static char o1[] = "pid"; 108 static char o2[] = "tt state time command"; 109 static char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 110 static char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 111 static char Zfmt[] = "lvl"; 112 113 static kvm_t *kd; 114 115 int 116 main(int argc, char *argv[]) 117 { 118 struct kinfo_proc *kp; 119 struct varent *vent; 120 struct winsize ws; 121 dev_t ttydev; 122 pid_t pid; 123 uid_t *uids; 124 int all, ch, flag, i, _fmt, lineno, nentries, dropgid; 125 int prtheader, wflag, what, xflg, uid, nuids; 126 char errbuf[_POSIX2_LINE_MAX]; 127 const char *nlistf, *memf; 128 129 (void) 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 if (argc > 1) 140 argv[1] = kludge_oldps_options(argv[1]); 141 142 all = _fmt = prtheader = wflag = xflg = 0; 143 pid = -1; 144 nuids = 0; 145 uids = NULL; 146 ttydev = NODEV; 147 dropgid = 0; 148 memf = nlistf = _PATH_DEVNULL; 149 while ((ch = getopt(argc, argv, 150 #if defined(LAZY_PS) 151 "aCcefghjLlM:mN:O:o:p:rSTt:U:uvwxZ")) != -1) 152 #else 153 "aCceghjLlM:mN:O:o:p:rSTt:U:uvwxZ")) != -1) 154 #endif 155 switch((char)ch) { 156 case 'a': 157 all = 1; 158 break; 159 case 'C': 160 rawcpu = 1; 161 break; 162 case 'c': 163 cflag = 1; 164 break; 165 case 'e': /* XXX set ufmt */ 166 needenv = 1; 167 break; 168 case 'g': 169 break; /* no-op */ 170 case 'h': 171 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 172 break; 173 case 'j': 174 parsefmt(jfmt); 175 _fmt = 1; 176 jfmt[0] = '\0'; 177 break; 178 case 'L': 179 showkey(); 180 exit(0); 181 case 'l': 182 parsefmt(lfmt); 183 _fmt = 1; 184 lfmt[0] = '\0'; 185 break; 186 case 'M': 187 memf = optarg; 188 dropgid = 1; 189 break; 190 case 'm': 191 sortby = SORTMEM; 192 break; 193 case 'N': 194 nlistf = optarg; 195 dropgid = 1; 196 break; 197 case 'O': 198 parsefmt(o1); 199 parsefmt(optarg); 200 parsefmt(o2); 201 o1[0] = o2[0] = '\0'; 202 _fmt = 1; 203 break; 204 case 'o': 205 parsefmt(optarg); 206 _fmt = 1; 207 break; 208 #if defined(LAZY_PS) 209 case 'f': 210 if (getuid() == 0 || getgid() == 0) 211 forceuread = 1; 212 break; 213 #endif 214 case 'p': 215 pid = atol(optarg); 216 xflg = 1; 217 break; 218 case 'r': 219 sortby = SORTCPU; 220 break; 221 case 'S': 222 sumrusage = 1; 223 break; 224 case 'T': 225 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 226 errx(1, "stdin: not a terminal"); 227 /* FALLTHROUGH */ 228 case 't': { 229 struct stat sb; 230 char *ttypath, pathbuf[PATH_MAX]; 231 232 if (strcmp(optarg, "co") == 0) 233 ttypath = strdup(_PATH_CONSOLE); 234 else if (*optarg != '/') 235 (void)snprintf(ttypath = pathbuf, 236 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 237 else 238 ttypath = optarg; 239 if (stat(ttypath, &sb) == -1) 240 err(1, "%s", ttypath); 241 if (!S_ISCHR(sb.st_mode)) 242 errx(1, "%s: not a terminal", ttypath); 243 ttydev = sb.st_rdev; 244 break; 245 } 246 case 'U': 247 uids = getuids(optarg, &nuids); 248 xflg++; /* XXX: intuitive? */ 249 break; 250 case 'u': 251 parsefmt(ufmt); 252 sortby = SORTCPU; 253 _fmt = 1; 254 ufmt[0] = '\0'; 255 break; 256 case 'v': 257 parsefmt(vfmt); 258 sortby = SORTMEM; 259 _fmt = 1; 260 vfmt[0] = '\0'; 261 break; 262 case 'w': 263 if (wflag) 264 termwidth = UNLIMITED; 265 else if (termwidth < 131) 266 termwidth = 131; 267 wflag++; 268 break; 269 case 'x': 270 xflg = 1; 271 break; 272 case 'Z': 273 parsefmt(Zfmt); 274 Zfmt[0] = '\0'; 275 break; 276 case '?': 277 default: 278 usage(); 279 } 280 argc -= optind; 281 argv += optind; 282 283 #define BACKWARD_COMPATIBILITY 284 #ifdef BACKWARD_COMPATIBILITY 285 if (*argv) { 286 nlistf = *argv; 287 if (*++argv) { 288 memf = *argv; 289 } 290 } 291 #endif 292 /* 293 * Discard setgid privileges if not the running kernel so that bad 294 * guys can't print interesting stuff from kernel memory. 295 */ 296 if (dropgid) { 297 setgid(getgid()); 298 setuid(getuid()); 299 } 300 301 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 302 if (kd == 0) 303 errx(1, "%s", errbuf); 304 305 if (!_fmt) 306 parsefmt(dfmt); 307 308 /* XXX - should be cleaner */ 309 if (!all && ttydev == NODEV && pid == -1 && !nuids) { 310 if ((uids = malloc(sizeof (*uids))) == NULL) 311 errx(1, "malloc: %s", strerror(errno)); 312 nuids = 1; 313 *uids = getuid(); 314 } 315 316 /* 317 * scan requested variables, noting what structures are needed, 318 * and adjusting header widths as appropriate. 319 */ 320 scanvars(); 321 /* 322 * get proc list 323 */ 324 if (nuids == 1) { 325 what = KERN_PROC_UID; 326 flag = *uids; 327 } else if (ttydev != NODEV) { 328 what = KERN_PROC_TTY; 329 flag = ttydev; 330 } else if (pid != -1) { 331 what = KERN_PROC_PID; 332 flag = pid; 333 } else { 334 what = KERN_PROC_ALL; 335 flag = 0; 336 } 337 /* 338 * select procs 339 */ 340 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0 || nentries < 0) 341 errx(1, "%s", kvm_geterr(kd)); 342 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 343 err(1, NULL); 344 for (i = nentries; --i >= 0; ++kp) { 345 kinfo[i].ki_p = kp; 346 if (needuser) 347 saveuser(&kinfo[i]); 348 dynsizevars(&kinfo[i]); 349 } 350 351 sizevars(); 352 353 /* 354 * print header 355 */ 356 printheader(); 357 if (nentries == 0) 358 exit(1); 359 /* 360 * sort proc list 361 */ 362 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 363 /* 364 * for each proc, call each variable output function. 365 */ 366 for (i = lineno = 0; i < nentries; i++) { 367 if (xflg == 0 && ((&kinfo[i])->ki_p->ki_tdev == NODEV || 368 ((&kinfo[i])->ki_p->ki_flag & P_CONTROLT ) == 0)) 369 continue; 370 if (nuids > 1) { 371 for (uid = 0; uid < nuids; uid++) 372 if ((&kinfo[i])->ki_p->ki_uid == uids[uid]) 373 break; 374 if (uid == nuids) 375 continue; 376 } 377 for (vent = vhead; vent; vent = vent->next) { 378 (vent->var->oproc)(&kinfo[i], vent); 379 if (vent->next != NULL) 380 (void)putchar(' '); 381 } 382 (void)putchar('\n'); 383 if (prtheader && lineno++ == prtheader - 4) { 384 (void)putchar('\n'); 385 printheader(); 386 lineno = 0; 387 } 388 } 389 free(uids); 390 lomac_stop(); 391 392 exit(eval); 393 } 394 395 uid_t * 396 getuids(const char *arg, int *nuids) 397 { 398 char name[UT_NAMESIZE + 1]; 399 struct passwd *pwd; 400 uid_t *uids, *moreuids; 401 int alloc; 402 size_t l; 403 404 405 alloc = 0; 406 *nuids = 0; 407 uids = NULL; 408 for (; (l = strcspn(arg, SEP)) > 0; arg += l + strspn(arg + l, SEP)) { 409 if (l >= sizeof name) { 410 warnx("%.*s: name too long", (int)l, arg); 411 continue; 412 } 413 strncpy(name, arg, l); 414 name[l] = '\0'; 415 if ((pwd = getpwnam(name)) == NULL) { 416 warnx("%s: no such user", name); 417 continue; 418 } 419 if (*nuids >= alloc) { 420 alloc = (alloc + 1) << 1; 421 moreuids = realloc(uids, alloc * sizeof (*uids)); 422 if (moreuids == NULL) { 423 free(uids); 424 errx(1, "realloc: %s", strerror(errno)); 425 } 426 uids = moreuids; 427 } 428 uids[(*nuids)++] = pwd->pw_uid; 429 } 430 endpwent(); 431 432 if (!*nuids) 433 errx(1, "No users specified"); 434 435 return uids; 436 } 437 438 static void 439 scanvars(void) 440 { 441 struct varent *vent; 442 VAR *v; 443 444 for (vent = vhead; vent; vent = vent->next) { 445 v = vent->var; 446 if (v->flag & DSIZ) { 447 v->dwidth = v->width; 448 v->width = 0; 449 } 450 if (v->flag & USER) 451 needuser = 1; 452 if (v->flag & COMM) 453 needcomm = 1; 454 } 455 } 456 457 static void 458 dynsizevars(KINFO *ki) 459 { 460 struct varent *vent; 461 VAR *v; 462 int i; 463 464 for (vent = vhead; vent; vent = vent->next) { 465 v = vent->var; 466 if (!(v->flag & DSIZ)) 467 continue; 468 i = (v->sproc)( ki); 469 if (v->width < i) 470 v->width = i; 471 if (v->width > v->dwidth) 472 v->width = v->dwidth; 473 } 474 } 475 476 static void 477 sizevars(void) 478 { 479 struct varent *vent; 480 VAR *v; 481 int i; 482 483 for (vent = vhead; vent; vent = vent->next) { 484 v = vent->var; 485 i = strlen(v->header); 486 if (v->width < i) 487 v->width = i; 488 totwidth += v->width + 1; /* +1 for space */ 489 } 490 totwidth--; 491 } 492 493 static const char * 494 fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki, 495 char *comm, int maxlen) 496 { 497 const char *s; 498 499 s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen); 500 if (s == NULL) 501 err(1, NULL); 502 return (s); 503 } 504 505 #define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM)) 506 507 static void 508 saveuser(KINFO *ki) 509 { 510 511 if (ki->ki_p->ki_sflag & PS_INMEM) { 512 /* 513 * The u-area might be swapped out, and we can't get 514 * at it because we have a crashdump and no swap. 515 * If it's here fill in these fields, otherwise, just 516 * leave them 0. 517 */ 518 ki->ki_valid = 1; 519 } else 520 ki->ki_valid = 0; 521 /* 522 * save arguments if needed 523 */ 524 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 525 ki->ki_args = strdup(fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 526 MAXCOMLEN)); 527 } else if (needcomm) { 528 asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm); 529 } else { 530 ki->ki_args = NULL; 531 } 532 if (needenv && UREADOK(ki)) { 533 ki->ki_env = strdup(fmt(kvm_getenvv, ki, (char *)NULL, 0)); 534 } else if (needenv) { 535 ki->ki_env = malloc(3); 536 strcpy(ki->ki_env, "()"); 537 } else { 538 ki->ki_env = NULL; 539 } 540 } 541 542 static int 543 pscomp(const void *a, const void *b) 544 { 545 int i; 546 #define VSIZE(k) ((k)->ki_p->ki_dsize + (k)->ki_p->ki_ssize + \ 547 (k)->ki_p->ki_tsize) 548 549 if (sortby == SORTCPU) 550 return (getpcpu((const KINFO *)b) - getpcpu((const KINFO *)a)); 551 if (sortby == SORTMEM) 552 return (VSIZE((const KINFO *)b) - VSIZE((const KINFO *)a)); 553 i = (int)((const KINFO *)a)->ki_p->ki_tdev - (int)((const KINFO *)b)->ki_p->ki_tdev; 554 if (i == 0) 555 i = ((const KINFO *)a)->ki_p->ki_pid - ((const KINFO *)b)->ki_p->ki_pid; 556 return (i); 557 } 558 559 /* 560 * ICK (all for getopt), would rather hide the ugliness 561 * here than taint the main code. 562 * 563 * ps foo -> ps -foo 564 * ps 34 -> ps -p34 565 * 566 * The old convention that 't' with no trailing tty arg means the users 567 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 568 * feature is available with the option 'T', which takes no argument. 569 */ 570 static char * 571 kludge_oldps_options(char *s) 572 { 573 size_t len; 574 char *newopts, *ns, *cp; 575 576 len = strlen(s); 577 if ((newopts = ns = malloc(len + 2)) == NULL) 578 err(1, NULL); 579 /* 580 * options begin with '-' 581 */ 582 if (*s != '-') 583 *ns++ = '-'; /* add option flag */ 584 /* 585 * gaze to end of argv[1] 586 */ 587 cp = s + len - 1; 588 /* 589 * if last letter is a 't' flag with no argument (in the context 590 * of the oldps options -- option string NOT starting with a '-' -- 591 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 592 * 593 * However, if a flag accepting a string argument is found in the 594 * option string, the remainder of the string is the argument to 595 * that flag; do not modify that argument. 596 */ 597 if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-') 598 *cp = 'T'; 599 else { 600 /* 601 * otherwise check for trailing number, which *may* be a 602 * pid. 603 */ 604 while (cp >= s && isdigit(*cp)) 605 --cp; 606 } 607 cp++; 608 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 609 ns += cp - s; 610 /* 611 * if there's a trailing number, and not a preceding 'p' (pid) or 612 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 613 */ 614 if (isdigit(*cp) && 615 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 616 (cp - 1 == s || cp[-2] != 't')) 617 *ns++ = 'p'; 618 (void)strcpy(ns, cp); /* and append the number */ 619 620 return (newopts); 621 } 622 623 static void 624 usage(void) 625 { 626 627 (void)fprintf(stderr, "%s\n%s\n%s\n", 628 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 629 " [-M core] [-N system]", 630 " ps [-L]"); 631 exit(1); 632 } 633