ps.c revision 90110
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 35static 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 42static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 43#endif 44static const char rcsid[] = 45 "$FreeBSD: head/bin/ps/ps.c 90110 2002-02-02 06:48:10Z imp $"; 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 77KINFO *kinfo; 78struct varent *vhead, *vtail; 79 80int eval; /* exit value */ 81int cflag; /* -c */ 82int rawcpu; /* -C */ 83int sumrusage; /* -S */ 84int termwidth; /* width of screen (0 == infinity) */ 85int totwidth; /* calculated width of requested variables */ 86 87static int needuser, needcomm, needenv; 88#if defined(LAZY_PS) 89static int forceuread=0; 90#else 91static int forceuread=1; 92#endif 93 94enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 95 96static char *fmt(char **(*)(kvm_t *, const struct kinfo_proc *, int), 97 KINFO *, char *, int); 98static char *kludge_oldps_options(char *); 99static int pscomp(const void *, const void *); 100static void saveuser(KINFO *); 101static void scanvars(void); 102static void dynsizevars(KINFO *); 103static void sizevars(void); 104static void usage(void); 105static uid_t *getuids(const char *, int *); 106 107char dfmt[] = "pid tt state time command"; 108char jfmt[] = "user pid ppid pgid jobc state tt time command"; 109char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 110char o1[] = "pid"; 111char o2[] = "tt state time command"; 112char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 113char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 114char Zfmt[] = "lvl"; 115 116kvm_t *kd; 117 118int 119main(int argc, 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, 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 = _PATH_DEVNULL; 151 while ((ch = getopt(argc, argv, 152#if defined(LAZY_PS) 153 "aCcefghjLlM:mN:O:o:p:rSTt:U:uvwxZ")) != -1) 154#else 155 "aCceghjLlM:mN:O:o:p:rSTt:U:uvwxZ")) != -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 if (wflag) 266 termwidth = UNLIMITED; 267 else if (termwidth < 131) 268 termwidth = 131; 269 wflag++; 270 break; 271 case 'x': 272 xflg = 1; 273 break; 274 case 'Z': 275 parsefmt(Zfmt); 276 Zfmt[0] = '\0'; 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 } 292 } 293#endif 294 /* 295 * Discard setgid privileges if not the running kernel so that bad 296 * guys can't print interesting stuff from kernel memory. 297 */ 298 if (dropgid) { 299 setgid(getgid()); 300 setuid(getuid()); 301 } 302 303 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 304 if (kd == 0) 305 errx(1, "%s", errbuf); 306 307 if (!fmt) 308 parsefmt(dfmt); 309 310 /* XXX - should be cleaner */ 311 if (!all && ttydev == NODEV && pid == -1 && !nuids) { 312 if ((uids = malloc(sizeof (*uids))) == NULL) 313 errx(1, "malloc: %s", strerror(errno)); 314 nuids = 1; 315 *uids = getuid(); 316 } 317 318 /* 319 * scan requested variables, noting what structures are needed, 320 * and adjusting header widths as appropriate. 321 */ 322 scanvars(); 323 /* 324 * get proc list 325 */ 326 if (nuids == 1) { 327 what = KERN_PROC_UID; 328 flag = *uids; 329 } else if (ttydev != NODEV) { 330 what = KERN_PROC_TTY; 331 flag = ttydev; 332 } else if (pid != -1) { 333 what = KERN_PROC_PID; 334 flag = pid; 335 } else { 336 what = KERN_PROC_ALL; 337 flag = 0; 338 } 339 /* 340 * select procs 341 */ 342 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0 || nentries < 0) 343 errx(1, "%s", kvm_geterr(kd)); 344 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 345 err(1, NULL); 346 for (i = nentries; --i >= 0; ++kp) { 347 kinfo[i].ki_p = kp; 348 if (needuser) 349 saveuser(&kinfo[i]); 350 dynsizevars(&kinfo[i]); 351 } 352 353 sizevars(); 354 355 /* 356 * print header 357 */ 358 printheader(); 359 if (nentries == 0) 360 exit(1); 361 /* 362 * sort proc list 363 */ 364 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 365 /* 366 * for each proc, call each variable output function. 367 */ 368 for (i = lineno = 0; i < nentries; i++) { 369 if (xflg == 0 && ((&kinfo[i])->ki_p->ki_tdev == NODEV || 370 ((&kinfo[i])->ki_p->ki_flag & P_CONTROLT ) == 0)) 371 continue; 372 if (nuids > 1) { 373 for (uid = 0; uid < nuids; uid++) 374 if ((&kinfo[i])->ki_p->ki_uid == uids[uid]) 375 break; 376 if (uid == nuids) 377 continue; 378 } 379 for (vent = vhead; vent; vent = vent->next) { 380 (vent->var->oproc)(&kinfo[i], vent); 381 if (vent->next != NULL) 382 (void)putchar(' '); 383 } 384 (void)putchar('\n'); 385 if (prtheader && lineno++ == prtheader - 4) { 386 (void)putchar('\n'); 387 printheader(); 388 lineno = 0; 389 } 390 } 391 free(uids); 392 lomac_stop(); 393 394 exit(eval); 395} 396 397uid_t * 398getuids(const char *arg, int *nuids) 399{ 400 char name[UT_NAMESIZE + 1]; 401 struct passwd *pwd; 402 uid_t *uids, *moreuids; 403 int l, alloc; 404 405 406 alloc = 0; 407 *nuids = 0; 408 uids = NULL; 409 for (; (l = strcspn(arg, SEP)) > 0; arg += l + strspn(arg + l, SEP)) { 410 if (l >= sizeof name) { 411 warnx("%.*s: name too long", l, arg); 412 continue; 413 } 414 strncpy(name, arg, l); 415 name[l] = '\0'; 416 if ((pwd = getpwnam(name)) == NULL) { 417 warnx("%s: no such user", name); 418 continue; 419 } 420 if (*nuids >= alloc) { 421 alloc = (alloc + 1) << 1; 422 moreuids = realloc(uids, alloc * sizeof (*uids)); 423 if (moreuids == NULL) { 424 free(uids); 425 errx(1, "realloc: %s", strerror(errno)); 426 } 427 uids = moreuids; 428 } 429 uids[(*nuids)++] = pwd->pw_uid; 430 } 431 endpwent(); 432 433 if (!*nuids) 434 errx(1, "No users specified"); 435 436 return uids; 437} 438 439static void 440scanvars(void) 441{ 442 struct varent *vent; 443 VAR *v; 444 445 for (vent = vhead; vent; vent = vent->next) { 446 v = vent->var; 447 if (v->flag & DSIZ) { 448 v->dwidth = v->width; 449 v->width = 0; 450 } 451 if (v->flag & USER) 452 needuser = 1; 453 if (v->flag & COMM) 454 needcomm = 1; 455 } 456} 457 458static void 459dynsizevars(KINFO *ki) 460{ 461 struct varent *vent; 462 VAR *v; 463 int i; 464 465 for (vent = vhead; vent; vent = vent->next) { 466 v = vent->var; 467 if (!(v->flag & DSIZ)) 468 continue; 469 i = (v->sproc)( ki); 470 if (v->width < i) 471 v->width = i; 472 if (v->width > v->dwidth) 473 v->width = v->dwidth; 474 } 475} 476 477static void 478sizevars(void) 479{ 480 struct varent *vent; 481 VAR *v; 482 int i; 483 484 for (vent = vhead; vent; vent = vent->next) { 485 v = vent->var; 486 i = strlen(v->header); 487 if (v->width < i) 488 v->width = i; 489 totwidth += v->width + 1; /* +1 for space */ 490 } 491 totwidth--; 492} 493 494static char * 495fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki, 496 char *comm, int maxlen) 497{ 498 char *s; 499 500 if ((s = 501 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 502 err(1, NULL); 503 return (s); 504} 505 506#define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM)) 507 508static void 509saveuser(KINFO *ki) 510{ 511 512 if (ki->ki_p->ki_sflag & PS_INMEM) { 513 /* 514 * The u-area might be swapped out, and we can't get 515 * at it because we have a crashdump and no swap. 516 * If it's here fill in these fields, otherwise, just 517 * leave them 0. 518 */ 519 ki->ki_valid = 1; 520 } else 521 ki->ki_valid = 0; 522 /* 523 * save arguments if needed 524 */ 525 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 526 ki->ki_args = fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 527 MAXCOMLEN); 528 } else if (needcomm) { 529 ki->ki_args = malloc(strlen(ki->ki_p->ki_comm) + 3); 530 sprintf(ki->ki_args, "(%s)", ki->ki_p->ki_comm); 531 } else { 532 ki->ki_args = NULL; 533 } 534 if (needenv && UREADOK(ki)) { 535 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 536 } else if (needenv) { 537 ki->ki_env = malloc(3); 538 strcpy(ki->ki_env, "()"); 539 } else { 540 ki->ki_env = NULL; 541 } 542} 543 544static int 545pscomp(const void *a, const void *b) 546{ 547 int i; 548#define VSIZE(k) ((k)->ki_p->ki_dsize + (k)->ki_p->ki_ssize + \ 549 (k)->ki_p->ki_tsize) 550 551 if (sortby == SORTCPU) 552 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 553 if (sortby == SORTMEM) 554 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 555 i = ((KINFO *)a)->ki_p->ki_tdev - ((KINFO *)b)->ki_p->ki_tdev; 556 if (i == 0) 557 i = ((KINFO *)a)->ki_p->ki_pid - ((KINFO *)b)->ki_p->ki_pid; 558 return (i); 559} 560 561/* 562 * ICK (all for getopt), would rather hide the ugliness 563 * here than taint the main code. 564 * 565 * ps foo -> ps -foo 566 * ps 34 -> ps -p34 567 * 568 * The old convention that 't' with no trailing tty arg means the users 569 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 570 * feature is available with the option 'T', which takes no argument. 571 */ 572static char * 573kludge_oldps_options(char *s) 574{ 575 size_t len; 576 char *newopts, *ns, *cp; 577 578 len = strlen(s); 579 if ((newopts = ns = malloc(len + 2)) == NULL) 580 err(1, NULL); 581 /* 582 * options begin with '-' 583 */ 584 if (*s != '-') 585 *ns++ = '-'; /* add option flag */ 586 /* 587 * gaze to end of argv[1] 588 */ 589 cp = s + len - 1; 590 /* 591 * if last letter is a 't' flag with no argument (in the context 592 * of the oldps options -- option string NOT starting with a '-' -- 593 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 594 * 595 * However, if a flag accepting a string argument is found in the 596 * option string, the remainder of the string is the argument to 597 * that flag; do not modify that argument. 598 */ 599 if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-') 600 *cp = 'T'; 601 else { 602 /* 603 * otherwise check for trailing number, which *may* be a 604 * pid. 605 */ 606 while (cp >= s && isdigit(*cp)) 607 --cp; 608 } 609 cp++; 610 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 611 ns += cp - s; 612 /* 613 * if there's a trailing number, and not a preceding 'p' (pid) or 614 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 615 */ 616 if (isdigit(*cp) && 617 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 618 (cp - 1 == s || cp[-2] != 't')) 619 *ns++ = 'p'; 620 (void)strcpy(ns, cp); /* and append the number */ 621 622 return (newopts); 623} 624 625static void 626usage(void) 627{ 628 629 (void)fprintf(stderr, "%s\n%s\n%s\n", 630 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 631 " [-M core] [-N system]", 632 " ps [-L]"); 633 exit(1); 634} 635