ps.c revision 102886
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 const char 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#if 0 41#ifndef lint 42static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 43#endif /* not lint */ 44#endif 45#include <sys/cdefs.h> 46__FBSDID("$FreeBSD: head/bin/ps/ps.c 102886 2002-09-03 05:44:00Z jmallett $"); 47 48#include <sys/param.h> 49#include <sys/user.h> 50#include <sys/stat.h> 51#include <sys/ioctl.h> 52#include <sys/sysctl.h> 53 54#include <ctype.h> 55#include <err.h> 56#include <fcntl.h> 57#include <kvm.h> 58#include <limits.h> 59#include <locale.h> 60#include <paths.h> 61#include <pwd.h> 62#include <stdio.h> 63#include <stdlib.h> 64#include <string.h> 65#include <unistd.h> 66 67#include "lomac.h" 68#include "ps.h" 69 70#define SEP ", \t" /* username separators */ 71 72static KINFO *kinfo; 73struct varent *vhead; 74 75int eval; /* exit value */ 76int cflag; /* -c */ 77int rawcpu; /* -C */ 78int sumrusage; /* -S */ 79int termwidth; /* width of screen (0 == infinity) */ 80int totwidth; /* calculated width of requested variables */ 81 82time_t now; /* current time(3) value */ 83 84static int needuser, needcomm, needenv; 85#if defined(LAZY_PS) 86static int forceuread=0; 87#else 88static int forceuread=1; 89#endif 90 91static enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 92 93static const char *fmt(char **(*)(kvm_t *, const struct kinfo_proc *, int), 94 KINFO *, char *, int); 95static char *kludge_oldps_options(char *); 96static int pscomp(const void *, const void *); 97static void saveuser(KINFO *); 98static void scanvars(void); 99static void dynsizevars(KINFO *); 100static void sizevars(void); 101static void usage(void); 102static uid_t *getuids(const char *, int *); 103 104static char dfmt[] = "pid,tt,state,time,command"; 105static char jfmt[] = "user,pid,ppid,pgid,jobc,state,tt,time,command"; 106static char lfmt[] = "uid,pid,ppid,cpu,pri,nice,vsz,rss,mwchan,state,tt,time,command"; 107static char o1[] = "pid"; 108static char o2[] = "tt,state,time,command"; 109static char ufmt[] = "user,pid,%cpu,%mem,vsz,rss,tt,state,start,time,command"; 110static char vfmt[] = "pid,state,time,sl,re,pagein,vsz,rss,lim,tsiz,%cpu,%mem,command"; 111static char Zfmt[] = "lvl"; 112 113static kvm_t *kd; 114 115#if defined(LAZY_PS) 116#define PS_ARGS "aCcefghjLlM:mN:O:o:p:rSTt:U:uvwxZ" 117#else 118#define PS_ARGS "aCceghjLlM:mN:O:o:p:rSTt:U:uvwxZ" 119#endif 120 121int 122main(int argc, char *argv[]) 123{ 124 struct kinfo_proc *kp; 125 struct varent *vent; 126 struct winsize ws; 127 dev_t ttydev; 128 pid_t pid; 129 uid_t *uids; 130 int all, ch, flag, i, _fmt, lineno, nentries, nocludge, dropgid; 131 int prtheader, wflag, what, xflg, uid, nuids; 132 char *cols; 133 char errbuf[_POSIX2_LINE_MAX]; 134 const char *cp, *nlistf, *memf; 135 136 (void) setlocale(LC_ALL, ""); 137 /* Set the time to what it is right now. */ 138 time(&now); 139 140 if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0') 141 termwidth = atoi(cols); 142 else if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 143 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 144 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 145 ws.ws_col == 0) 146 termwidth = 79; 147 else 148 termwidth = ws.ws_col - 1; 149 150 /* 151 * Don't apply a kludge if the first argument is an option taking an 152 * argument 153 */ 154 if (argc > 1) { 155 nocludge = 0; 156 if (argv[1][0] == '-') { 157 for (cp = PS_ARGS; *cp != '\0'; cp++) { 158 if (*cp != ':') 159 continue; 160 if (*(cp - 1) == argv[1][1]) { 161 nocludge = 1; 162 break; 163 } 164 } 165 } 166 if (nocludge == 0) 167 argv[1] = kludge_oldps_options(argv[1]); 168 } 169 170 all = _fmt = prtheader = wflag = xflg = 0; 171 pid = -1; 172 nuids = 0; 173 uids = NULL; 174 ttydev = NODEV; 175 dropgid = 0; 176 memf = nlistf = _PATH_DEVNULL; 177 while ((ch = getopt(argc, argv, PS_ARGS)) != -1) 178 switch((char)ch) { 179 case 'a': 180 all = 1; 181 break; 182 case 'C': 183 rawcpu = 1; 184 break; 185 case 'c': 186 cflag = 1; 187 break; 188 case 'e': /* XXX set ufmt */ 189 needenv = 1; 190 break; 191 case 'g': 192 break; /* no-op */ 193 case 'h': 194 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 195 break; 196 case 'j': 197 parsefmt(jfmt); 198 _fmt = 1; 199 jfmt[0] = '\0'; 200 break; 201 case 'L': 202 showkey(); 203 exit(0); 204 case 'l': 205 parsefmt(lfmt); 206 _fmt = 1; 207 lfmt[0] = '\0'; 208 break; 209 case 'M': 210 memf = optarg; 211 dropgid = 1; 212 break; 213 case 'm': 214 sortby = SORTMEM; 215 break; 216 case 'N': 217 nlistf = optarg; 218 dropgid = 1; 219 break; 220 case 'O': 221 parsefmt(o1); 222 parsefmt(optarg); 223 parsefmt(o2); 224 o1[0] = o2[0] = '\0'; 225 _fmt = 1; 226 break; 227 case 'o': 228 parsefmt(optarg); 229 _fmt = 1; 230 break; 231#if defined(LAZY_PS) 232 case 'f': 233 if (getuid() == 0 || getgid() == 0) 234 forceuread = 1; 235 break; 236#endif 237 case 'p': 238 pid = atol(optarg); 239 xflg = 1; 240 break; 241 case 'r': 242 sortby = SORTCPU; 243 break; 244 case 'S': 245 sumrusage = 1; 246 break; 247 case 'T': 248 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 249 errx(1, "stdin: not a terminal"); 250 /* FALLTHROUGH */ 251 case 't': { 252 struct stat sb; 253 char *ttypath, pathbuf[PATH_MAX]; 254 255 if (strcmp(optarg, "co") == 0) 256 ttypath = strdup(_PATH_CONSOLE); 257 else if (*optarg != '/') 258 (void)snprintf(ttypath = pathbuf, 259 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 260 else 261 ttypath = optarg; 262 if (stat(ttypath, &sb) == -1) 263 err(1, "%s", ttypath); 264 if (!S_ISCHR(sb.st_mode)) 265 errx(1, "%s: not a terminal", ttypath); 266 ttydev = sb.st_rdev; 267 break; 268 } 269 case 'U': 270 uids = getuids(optarg, &nuids); 271 xflg++; /* XXX: intuitive? */ 272 break; 273 case 'u': 274 parsefmt(ufmt); 275 sortby = SORTCPU; 276 _fmt = 1; 277 ufmt[0] = '\0'; 278 break; 279 case 'v': 280 parsefmt(vfmt); 281 sortby = SORTMEM; 282 _fmt = 1; 283 vfmt[0] = '\0'; 284 break; 285 case 'w': 286 if (wflag) 287 termwidth = UNLIMITED; 288 else if (termwidth < 131) 289 termwidth = 131; 290 wflag++; 291 break; 292 case 'x': 293 xflg = 1; 294 break; 295 case 'Z': 296 parsefmt(Zfmt); 297 Zfmt[0] = '\0'; 298 break; 299 case '?': 300 default: 301 usage(); 302 } 303 argc -= optind; 304 argv += optind; 305 306#define BACKWARD_COMPATIBILITY 307#ifdef BACKWARD_COMPATIBILITY 308 if (*argv) { 309 nlistf = *argv; 310 if (*++argv) { 311 memf = *argv; 312 } 313 } 314#endif 315 /* 316 * Discard setgid privileges if not the running kernel so that bad 317 * guys can't print interesting stuff from kernel memory. 318 */ 319 if (dropgid) { 320 setgid(getgid()); 321 setuid(getuid()); 322 } 323 324 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 325 if (kd == 0) 326 errx(1, "%s", errbuf); 327 328 if (!_fmt) 329 parsefmt(dfmt); 330 331 /* XXX - should be cleaner */ 332 if (!all && ttydev == NODEV && pid == -1 && !nuids) { 333 if ((uids = malloc(sizeof (*uids))) == NULL) 334 errx(1, "malloc failed"); 335 nuids = 1; 336 *uids = getuid(); 337 } 338 339 /* 340 * scan requested variables, noting what structures are needed, 341 * and adjusting header widths as appropriate. 342 */ 343 scanvars(); 344 /* 345 * get proc list 346 */ 347 if (nuids == 1) { 348 what = KERN_PROC_UID; 349 flag = *uids; 350 } else if (ttydev != NODEV) { 351 what = KERN_PROC_TTY; 352 flag = ttydev; 353 } else if (pid != -1) { 354 what = KERN_PROC_PID; 355 flag = pid; 356 } else { 357 what = KERN_PROC_ALL; 358 flag = 0; 359 } 360 /* 361 * select procs 362 */ 363 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0 || nentries < 0) 364 errx(1, "%s", kvm_geterr(kd)); 365 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 366 errx(1, "malloc failed"); 367 for (i = nentries; --i >= 0; ++kp) { 368 kinfo[i].ki_p = kp; 369 if (needuser) 370 saveuser(&kinfo[i]); 371 dynsizevars(&kinfo[i]); 372 } 373 374 sizevars(); 375 376 /* 377 * print header 378 */ 379 printheader(); 380 if (nentries == 0) 381 exit(1); 382 /* 383 * sort proc list 384 */ 385 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 386 /* 387 * for each proc, call each variable output function. 388 */ 389 for (i = lineno = 0; i < nentries; i++) { 390 if (xflg == 0 && ((&kinfo[i])->ki_p->ki_tdev == NODEV || 391 ((&kinfo[i])->ki_p->ki_flag & P_CONTROLT ) == 0)) 392 continue; 393 if (nuids > 1) { 394 for (uid = 0; uid < nuids; uid++) 395 if ((&kinfo[i])->ki_p->ki_uid == uids[uid]) 396 break; 397 if (uid == nuids) 398 continue; 399 } 400 for (vent = vhead; vent; vent = vent->next) { 401 (vent->var->oproc)(&kinfo[i], vent); 402 if (vent->next != NULL) 403 (void)putchar(' '); 404 } 405 (void)putchar('\n'); 406 if (prtheader && lineno++ == prtheader - 4) { 407 (void)putchar('\n'); 408 printheader(); 409 lineno = 0; 410 } 411 } 412 free(uids); 413 lomac_stop(); 414 415 exit(eval); 416} 417 418uid_t * 419getuids(const char *arg, int *nuids) 420{ 421 char name[MAXLOGNAME]; 422 struct passwd *pwd; 423 uid_t *uids, *moreuids; 424 int alloc; 425 size_t l; 426 427 428 alloc = 0; 429 *nuids = 0; 430 uids = NULL; 431 for (; (l = strcspn(arg, SEP)) > 0; arg += l + strspn(arg + l, SEP)) { 432 if (l >= sizeof name) { 433 warnx("%.*s: name too long", (int)l, arg); 434 continue; 435 } 436 strncpy(name, arg, l); 437 name[l] = '\0'; 438 if ((pwd = getpwnam(name)) == NULL) { 439 warnx("%s: no such user", name); 440 continue; 441 } 442 if (*nuids >= alloc) { 443 alloc = (alloc + 1) << 1; 444 moreuids = realloc(uids, alloc * sizeof (*uids)); 445 if (moreuids == NULL) { 446 free(uids); 447 errx(1, "realloc failed"); 448 } 449 uids = moreuids; 450 } 451 uids[(*nuids)++] = pwd->pw_uid; 452 } 453 endpwent(); 454 455 if (!*nuids) 456 errx(1, "No users specified"); 457 458 return uids; 459} 460 461static void 462scanvars(void) 463{ 464 struct varent *vent; 465 VAR *v; 466 467 for (vent = vhead; vent; vent = vent->next) { 468 v = vent->var; 469 if (v->flag & DSIZ) { 470 v->dwidth = v->width; 471 v->width = 0; 472 } 473 if (v->flag & USER) 474 needuser = 1; 475 if (v->flag & COMM) 476 needcomm = 1; 477 } 478} 479 480static void 481dynsizevars(KINFO *ki) 482{ 483 struct varent *vent; 484 VAR *v; 485 int i; 486 487 for (vent = vhead; vent; vent = vent->next) { 488 v = vent->var; 489 if (!(v->flag & DSIZ)) 490 continue; 491 i = (v->sproc)( ki); 492 if (v->width < i) 493 v->width = i; 494 if (v->width > v->dwidth) 495 v->width = v->dwidth; 496 } 497} 498 499static void 500sizevars(void) 501{ 502 struct varent *vent; 503 VAR *v; 504 int i; 505 506 for (vent = vhead; vent; vent = vent->next) { 507 v = vent->var; 508 i = strlen(v->header); 509 if (v->width < i) 510 v->width = i; 511 totwidth += v->width + 1; /* +1 for space */ 512 } 513 totwidth--; 514} 515 516static const char * 517fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki, 518 char *comm, int maxlen) 519{ 520 const char *s; 521 522 s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen); 523 return (s); 524} 525 526#define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM)) 527 528static void 529saveuser(KINFO *ki) 530{ 531 532 if (ki->ki_p->ki_sflag & PS_INMEM) { 533 /* 534 * The u-area might be swapped out, and we can't get 535 * at it because we have a crashdump and no swap. 536 * If it's here fill in these fields, otherwise, just 537 * leave them 0. 538 */ 539 ki->ki_valid = 1; 540 } else 541 ki->ki_valid = 0; 542 /* 543 * save arguments if needed 544 */ 545 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 546 ki->ki_args = strdup(fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 547 MAXCOMLEN)); 548 } else if (needcomm) { 549 asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm); 550 } else { 551 ki->ki_args = NULL; 552 } 553 if (needenv && UREADOK(ki)) { 554 ki->ki_env = strdup(fmt(kvm_getenvv, ki, (char *)NULL, 0)); 555 } else if (needenv) { 556 ki->ki_env = malloc(3); 557 strcpy(ki->ki_env, "()"); 558 } else { 559 ki->ki_env = NULL; 560 } 561} 562 563static int 564pscomp(const void *a, const void *b) 565{ 566 int i; 567#define VSIZE(k) ((k)->ki_p->ki_dsize + (k)->ki_p->ki_ssize + \ 568 (k)->ki_p->ki_tsize) 569 570 if (sortby == SORTCPU) 571 return (getpcpu((const KINFO *)b) - getpcpu((const KINFO *)a)); 572 if (sortby == SORTMEM) 573 return (VSIZE((const KINFO *)b) - VSIZE((const KINFO *)a)); 574 i = (int)((const KINFO *)a)->ki_p->ki_tdev - (int)((const KINFO *)b)->ki_p->ki_tdev; 575 if (i == 0) 576 i = ((const KINFO *)a)->ki_p->ki_pid - ((const KINFO *)b)->ki_p->ki_pid; 577 return (i); 578} 579 580/* 581 * ICK (all for getopt), would rather hide the ugliness 582 * here than taint the main code. 583 * 584 * ps foo -> ps -foo 585 * ps 34 -> ps -p34 586 * 587 * The old convention that 't' with no trailing tty arg means the users 588 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 589 * feature is available with the option 'T', which takes no argument. 590 */ 591static char * 592kludge_oldps_options(char *s) 593{ 594 int have_fmt; 595 size_t len; 596 char *newopts, *ns, *cp; 597 598 /* 599 * If we have an 'o' option, then note it, since we don't want to do 600 * some types of munging. 601 */ 602 have_fmt = index(s, 'o') != NULL; 603 604 len = strlen(s); 605 if ((newopts = ns = malloc(len + 2)) == NULL) 606 errx(1, "malloc failed"); 607 /* 608 * options begin with '-' 609 */ 610 if (*s != '-') 611 *ns++ = '-'; /* add option flag */ 612 /* 613 * gaze to end of argv[1] 614 */ 615 cp = s + len - 1; 616 /* 617 * if last letter is a 't' flag with no argument (in the context 618 * of the oldps options -- option string NOT starting with a '-' -- 619 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 620 * 621 * However, if a flag accepting a string argument is found in the 622 * option string, the remainder of the string is the argument to 623 * that flag; do not modify that argument. 624 */ 625 if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-') 626 *cp = 'T'; 627 else { 628 /* 629 * otherwise check for trailing number, which *may* be a 630 * pid. 631 */ 632 while (cp >= s && isdigit(*cp)) 633 --cp; 634 } 635 cp++; 636 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 637 ns += cp - s; 638 /* 639 * if there's a trailing number, and not a preceding 'p' (pid) or 640 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 641 */ 642 if (isdigit(*cp) && 643 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 644 (cp - 1 == s || cp[-2] != 't') && !have_fmt) 645 *ns++ = 'p'; 646 (void)strcpy(ns, cp); /* and append the number */ 647 648 return (newopts); 649} 650 651static void 652usage(void) 653{ 654 655 (void)fprintf(stderr, "%s\n%s\n%s\n", 656 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 657 " [-M core] [-N system]", 658 " ps [-L]"); 659 exit(1); 660} 661