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 time_t now; /* current time(3) value */ 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 static enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 94 95 static const char *fmt(char **(*)(kvm_t *, const struct kinfo_proc *, int), 96 KINFO *, char *, int); 97 static char *kludge_oldps_options(char *); 98 static int pscomp(const void *, const void *); 99 static void saveuser(KINFO *); 100 static void scanvars(void); 101 static void dynsizevars(KINFO *); 102 static void sizevars(void); 103 static void usage(void); 104 static uid_t *getuids(const char *, int *); 105 106 static char dfmt[] = "pid,tt,state,time,command"; 107 static char jfmt[] = "user,pid,ppid,pgid,jobc,state,tt,time,command"; 108 static char lfmt[] = "uid,pid,ppid,cpu,pri,nice,vsz,rss,mwchan,state,tt,time,command"; 109 static char o1[] = "pid"; 110 static char o2[] = "tt,state,time,command"; 111 static char ufmt[] = "user,pid,%cpu,%mem,vsz,rss,tt,state,start,time,command"; 112 static char vfmt[] = "pid,state,time,sl,re,pagein,vsz,rss,lim,tsiz,%cpu,%mem,command"; 113 static char Zfmt[] = "lvl"; 114 115 static kvm_t *kd; 116 117 int 118 main(int argc, char *argv[]) 119 { 120 struct kinfo_proc *kp; 121 struct varent *vent; 122 struct winsize ws; 123 dev_t ttydev; 124 pid_t pid; 125 uid_t *uids; 126 int all, ch, flag, i, _fmt, lineno, nentries, dropgid; 127 int prtheader, wflag, what, xflg, uid, nuids; 128 char *cols; 129 char errbuf[_POSIX2_LINE_MAX]; 130 const char *nlistf, *memf; 131 132 (void) setlocale(LC_ALL, ""); 133 /* Set the time to what it is right now. */ 134 time(&now); 135 136 if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0') 137 termwidth = atoi(cols); 138 else if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 139 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 140 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 141 ws.ws_col == 0) 142 termwidth = 79; 143 else 144 termwidth = ws.ws_col - 1; 145 146 if (argc > 1) 147 argv[1] = kludge_oldps_options(argv[1]); 148 149 all = _fmt = prtheader = wflag = xflg = 0; 150 pid = -1; 151 nuids = 0; 152 uids = NULL; 153 ttydev = NODEV; 154 dropgid = 0; 155 memf = nlistf = _PATH_DEVNULL; 156 while ((ch = getopt(argc, argv, 157 #if defined(LAZY_PS) 158 "aCcefghjLlM:mN:O:o:p:rSTt:U:uvwxZ")) != -1) 159 #else 160 "aCceghjLlM:mN:O:o:p:rSTt:U:uvwxZ")) != -1) 161 #endif 162 switch((char)ch) { 163 case 'a': 164 all = 1; 165 break; 166 case 'C': 167 rawcpu = 1; 168 break; 169 case 'c': 170 cflag = 1; 171 break; 172 case 'e': /* XXX set ufmt */ 173 needenv = 1; 174 break; 175 case 'g': 176 break; /* no-op */ 177 case 'h': 178 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 179 break; 180 case 'j': 181 parsefmt(jfmt); 182 _fmt = 1; 183 jfmt[0] = '\0'; 184 break; 185 case 'L': 186 showkey(); 187 exit(0); 188 case 'l': 189 parsefmt(lfmt); 190 _fmt = 1; 191 lfmt[0] = '\0'; 192 break; 193 case 'M': 194 memf = optarg; 195 dropgid = 1; 196 break; 197 case 'm': 198 sortby = SORTMEM; 199 break; 200 case 'N': 201 nlistf = optarg; 202 dropgid = 1; 203 break; 204 case 'O': 205 parsefmt(o1); 206 parsefmt(optarg); 207 parsefmt(o2); 208 o1[0] = o2[0] = '\0'; 209 _fmt = 1; 210 break; 211 case 'o': 212 parsefmt(optarg); 213 _fmt = 1; 214 break; 215 #if defined(LAZY_PS) 216 case 'f': 217 if (getuid() == 0 || getgid() == 0) 218 forceuread = 1; 219 break; 220 #endif 221 case 'p': 222 pid = atol(optarg); 223 xflg = 1; 224 break; 225 case 'r': 226 sortby = SORTCPU; 227 break; 228 case 'S': 229 sumrusage = 1; 230 break; 231 case 'T': 232 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 233 errx(1, "stdin: not a terminal"); 234 /* FALLTHROUGH */ 235 case 't': { 236 struct stat sb; 237 char *ttypath, pathbuf[PATH_MAX]; 238 239 if (strcmp(optarg, "co") == 0) 240 ttypath = strdup(_PATH_CONSOLE); 241 else if (*optarg != '/') 242 (void)snprintf(ttypath = pathbuf, 243 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 244 else 245 ttypath = optarg; 246 if (stat(ttypath, &sb) == -1) 247 err(1, "%s", ttypath); 248 if (!S_ISCHR(sb.st_mode)) 249 errx(1, "%s: not a terminal", ttypath); 250 ttydev = sb.st_rdev; 251 break; 252 } 253 case 'U': 254 uids = getuids(optarg, &nuids); 255 xflg++; /* XXX: intuitive? */ 256 break; 257 case 'u': 258 parsefmt(ufmt); 259 sortby = SORTCPU; 260 _fmt = 1; 261 ufmt[0] = '\0'; 262 break; 263 case 'v': 264 parsefmt(vfmt); 265 sortby = SORTMEM; 266 _fmt = 1; 267 vfmt[0] = '\0'; 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 } 297 } 298 #endif 299 /* 300 * Discard setgid privileges if not the running kernel so that bad 301 * guys can't print interesting stuff from kernel memory. 302 */ 303 if (dropgid) { 304 setgid(getgid()); 305 setuid(getuid()); 306 } 307 308 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 309 if (kd == 0) 310 errx(1, "%s", errbuf); 311 312 if (!_fmt) 313 parsefmt(dfmt); 314 315 /* XXX - should be cleaner */ 316 if (!all && ttydev == NODEV && pid == -1 && !nuids) { 317 if ((uids = malloc(sizeof (*uids))) == NULL) 318 errx(1, "malloc failed"); 319 nuids = 1; 320 *uids = getuid(); 321 } 322 323 /* 324 * scan requested variables, noting what structures are needed, 325 * and adjusting header widths as appropriate. 326 */ 327 scanvars(); 328 /* 329 * get proc list 330 */ 331 if (nuids == 1) { 332 what = KERN_PROC_UID; 333 flag = *uids; 334 } else if (ttydev != NODEV) { 335 what = KERN_PROC_TTY; 336 flag = ttydev; 337 } else if (pid != -1) { 338 what = KERN_PROC_PID; 339 flag = pid; 340 } else { 341 what = KERN_PROC_ALL; 342 flag = 0; 343 } 344 /* 345 * select procs 346 */ 347 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0 || nentries < 0) 348 errx(1, "%s", kvm_geterr(kd)); 349 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 350 errx(1, "malloc failed"); 351 for (i = nentries; --i >= 0; ++kp) { 352 kinfo[i].ki_p = kp; 353 if (needuser) 354 saveuser(&kinfo[i]); 355 dynsizevars(&kinfo[i]); 356 } 357 358 sizevars(); 359 360 /* 361 * print header 362 */ 363 printheader(); 364 if (nentries == 0) 365 exit(1); 366 /* 367 * sort proc list 368 */ 369 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 370 /* 371 * for each proc, call each variable output function. 372 */ 373 for (i = lineno = 0; i < nentries; i++) { 374 if (xflg == 0 && ((&kinfo[i])->ki_p->ki_tdev == NODEV || 375 ((&kinfo[i])->ki_p->ki_flag & P_CONTROLT ) == 0)) 376 continue; 377 if (nuids > 1) { 378 for (uid = 0; uid < nuids; uid++) 379 if ((&kinfo[i])->ki_p->ki_uid == uids[uid]) 380 break; 381 if (uid == nuids) 382 continue; 383 } 384 for (vent = vhead; vent; vent = vent->next) { 385 (vent->var->oproc)(&kinfo[i], vent); 386 if (vent->next != NULL) 387 (void)putchar(' '); 388 } 389 (void)putchar('\n'); 390 if (prtheader && lineno++ == prtheader - 4) { 391 (void)putchar('\n'); 392 printheader(); 393 lineno = 0; 394 } 395 } 396 free(uids); 397 lomac_stop(); 398 399 exit(eval); 400 } 401 402 uid_t * 403 getuids(const char *arg, int *nuids) 404 { 405 char name[UT_NAMESIZE + 1]; 406 struct passwd *pwd; 407 uid_t *uids, *moreuids; 408 int alloc; 409 size_t l; 410 411 412 alloc = 0; 413 *nuids = 0; 414 uids = NULL; 415 for (; (l = strcspn(arg, SEP)) > 0; arg += l + strspn(arg + l, SEP)) { 416 if (l >= sizeof name) { 417 warnx("%.*s: name too long", (int)l, arg); 418 continue; 419 } 420 strncpy(name, arg, l); 421 name[l] = '\0'; 422 if ((pwd = getpwnam(name)) == NULL) { 423 warnx("%s: no such user", name); 424 continue; 425 } 426 if (*nuids >= alloc) { 427 alloc = (alloc + 1) << 1; 428 moreuids = realloc(uids, alloc * sizeof (*uids)); 429 if (moreuids == NULL) { 430 free(uids); 431 errx(1, "realloc failed"); 432 } 433 uids = moreuids; 434 } 435 uids[(*nuids)++] = pwd->pw_uid; 436 } 437 endpwent(); 438 439 if (!*nuids) 440 errx(1, "No users specified"); 441 442 return uids; 443 } 444 445 static void 446 scanvars(void) 447 { 448 struct varent *vent; 449 VAR *v; 450 451 for (vent = vhead; vent; vent = vent->next) { 452 v = vent->var; 453 if (v->flag & DSIZ) { 454 v->dwidth = v->width; 455 v->width = 0; 456 } 457 if (v->flag & USER) 458 needuser = 1; 459 if (v->flag & COMM) 460 needcomm = 1; 461 } 462 } 463 464 static void 465 dynsizevars(KINFO *ki) 466 { 467 struct varent *vent; 468 VAR *v; 469 int i; 470 471 for (vent = vhead; vent; vent = vent->next) { 472 v = vent->var; 473 if (!(v->flag & DSIZ)) 474 continue; 475 i = (v->sproc)( ki); 476 if (v->width < i) 477 v->width = i; 478 if (v->width > v->dwidth) 479 v->width = v->dwidth; 480 } 481 } 482 483 static void 484 sizevars(void) 485 { 486 struct varent *vent; 487 VAR *v; 488 int i; 489 490 for (vent = vhead; vent; vent = vent->next) { 491 v = vent->var; 492 i = strlen(v->header); 493 if (v->width < i) 494 v->width = i; 495 totwidth += v->width + 1; /* +1 for space */ 496 } 497 totwidth--; 498 } 499 500 static const char * 501 fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki, 502 char *comm, int maxlen) 503 { 504 const char *s; 505 506 s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen); 507 return (s); 508 } 509 510 #define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM)) 511 512 static void 513 saveuser(KINFO *ki) 514 { 515 516 if (ki->ki_p->ki_sflag & PS_INMEM) { 517 /* 518 * The u-area might be swapped out, and we can't get 519 * at it because we have a crashdump and no swap. 520 * If it's here fill in these fields, otherwise, just 521 * leave them 0. 522 */ 523 ki->ki_valid = 1; 524 } else 525 ki->ki_valid = 0; 526 /* 527 * save arguments if needed 528 */ 529 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 530 ki->ki_args = strdup(fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 531 MAXCOMLEN)); 532 } else if (needcomm) { 533 asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm); 534 } else { 535 ki->ki_args = NULL; 536 } 537 if (needenv && UREADOK(ki)) { 538 ki->ki_env = strdup(fmt(kvm_getenvv, ki, (char *)NULL, 0)); 539 } else if (needenv) { 540 ki->ki_env = malloc(3); 541 strcpy(ki->ki_env, "()"); 542 } else { 543 ki->ki_env = NULL; 544 } 545 } 546 547 static int 548 pscomp(const void *a, const void *b) 549 { 550 int i; 551 #define VSIZE(k) ((k)->ki_p->ki_dsize + (k)->ki_p->ki_ssize + \ 552 (k)->ki_p->ki_tsize) 553 554 if (sortby == SORTCPU) 555 return (getpcpu((const KINFO *)b) - getpcpu((const KINFO *)a)); 556 if (sortby == SORTMEM) 557 return (VSIZE((const KINFO *)b) - VSIZE((const KINFO *)a)); 558 i = (int)((const KINFO *)a)->ki_p->ki_tdev - (int)((const KINFO *)b)->ki_p->ki_tdev; 559 if (i == 0) 560 i = ((const KINFO *)a)->ki_p->ki_pid - ((const KINFO *)b)->ki_p->ki_pid; 561 return (i); 562 } 563 564 /* 565 * ICK (all for getopt), would rather hide the ugliness 566 * here than taint the main code. 567 * 568 * ps foo -> ps -foo 569 * ps 34 -> ps -p34 570 * 571 * The old convention that 't' with no trailing tty arg means the users 572 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 573 * feature is available with the option 'T', which takes no argument. 574 */ 575 static char * 576 kludge_oldps_options(char *s) 577 { 578 size_t len; 579 char *newopts, *ns, *cp; 580 581 len = strlen(s); 582 if ((newopts = ns = malloc(len + 2)) == NULL) 583 errx(1, "malloc failed"); 584 /* 585 * options begin with '-' 586 */ 587 if (*s != '-') 588 *ns++ = '-'; /* add option flag */ 589 /* 590 * gaze to end of argv[1] 591 */ 592 cp = s + len - 1; 593 /* 594 * if last letter is a 't' flag with no argument (in the context 595 * of the oldps options -- option string NOT starting with a '-' -- 596 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 597 * 598 * However, if a flag accepting a string argument is found in the 599 * option string, the remainder of the string is the argument to 600 * that flag; do not modify that argument. 601 */ 602 if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-') 603 *cp = 'T'; 604 else { 605 /* 606 * otherwise check for trailing number, which *may* be a 607 * pid. 608 */ 609 while (cp >= s && isdigit(*cp)) 610 --cp; 611 } 612 cp++; 613 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 614 ns += cp - s; 615 /* 616 * if there's a trailing number, and not a preceding 'p' (pid) or 617 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 618 */ 619 if (isdigit(*cp) && 620 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 621 (cp - 1 == s || cp[-2] != 't')) 622 *ns++ = 'p'; 623 (void)strcpy(ns, cp); /* and append the number */ 624 625 return (newopts); 626 } 627 628 static void 629 usage(void) 630 { 631 632 (void)fprintf(stderr, "%s\n%s\n%s\n", 633 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 634 " [-M core] [-N system]", 635 " ps [-L]"); 636 exit(1); 637 } 638