ps.c revision 97804
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: head/bin/ps/ps.c 97804 2002-06-04 10:20:10Z tjr $"); 36 37#ifndef lint 38static 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 45static 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 74static KINFO *kinfo; 75struct varent *vhead; 76 77int eval; /* exit value */ 78int cflag; /* -c */ 79int rawcpu; /* -C */ 80int sumrusage; /* -S */ 81int termwidth; /* width of screen (0 == infinity) */ 82int totwidth; /* calculated width of requested variables */ 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 115int 116main(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 *cols; 127 char errbuf[_POSIX2_LINE_MAX]; 128 const char *nlistf, *memf; 129 130 (void) setlocale(LC_ALL, ""); 131 132 if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0') 133 termwidth = atoi(cols); 134 else if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 135 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 136 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 137 ws.ws_col == 0) 138 termwidth = 79; 139 else 140 termwidth = ws.ws_col - 1; 141 142 if (argc > 1) 143 argv[1] = kludge_oldps_options(argv[1]); 144 145 all = _fmt = prtheader = wflag = xflg = 0; 146 pid = -1; 147 nuids = 0; 148 uids = NULL; 149 ttydev = NODEV; 150 dropgid = 0; 151 memf = nlistf = _PATH_DEVNULL; 152 while ((ch = getopt(argc, argv, 153#if defined(LAZY_PS) 154 "aCcefghjLlM:mN:O:o:p:rSTt:U:uvwxZ")) != -1) 155#else 156 "aCceghjLlM:mN:O:o:p:rSTt:U:uvwxZ")) != -1) 157#endif 158 switch((char)ch) { 159 case 'a': 160 all = 1; 161 break; 162 case 'C': 163 rawcpu = 1; 164 break; 165 case 'c': 166 cflag = 1; 167 break; 168 case 'e': /* XXX set ufmt */ 169 needenv = 1; 170 break; 171 case 'g': 172 break; /* no-op */ 173 case 'h': 174 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 175 break; 176 case 'j': 177 parsefmt(jfmt); 178 _fmt = 1; 179 jfmt[0] = '\0'; 180 break; 181 case 'L': 182 showkey(); 183 exit(0); 184 case 'l': 185 parsefmt(lfmt); 186 _fmt = 1; 187 lfmt[0] = '\0'; 188 break; 189 case 'M': 190 memf = optarg; 191 dropgid = 1; 192 break; 193 case 'm': 194 sortby = SORTMEM; 195 break; 196 case 'N': 197 nlistf = optarg; 198 dropgid = 1; 199 break; 200 case 'O': 201 parsefmt(o1); 202 parsefmt(optarg); 203 parsefmt(o2); 204 o1[0] = o2[0] = '\0'; 205 _fmt = 1; 206 break; 207 case 'o': 208 parsefmt(optarg); 209 _fmt = 1; 210 break; 211#if defined(LAZY_PS) 212 case 'f': 213 if (getuid() == 0 || getgid() == 0) 214 forceuread = 1; 215 break; 216#endif 217 case 'p': 218 pid = atol(optarg); 219 xflg = 1; 220 break; 221 case 'r': 222 sortby = SORTCPU; 223 break; 224 case 'S': 225 sumrusage = 1; 226 break; 227 case 'T': 228 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 229 errx(1, "stdin: not a terminal"); 230 /* FALLTHROUGH */ 231 case 't': { 232 struct stat sb; 233 char *ttypath, pathbuf[PATH_MAX]; 234 235 if (strcmp(optarg, "co") == 0) 236 ttypath = strdup(_PATH_CONSOLE); 237 else if (*optarg != '/') 238 (void)snprintf(ttypath = pathbuf, 239 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 240 else 241 ttypath = optarg; 242 if (stat(ttypath, &sb) == -1) 243 err(1, "%s", ttypath); 244 if (!S_ISCHR(sb.st_mode)) 245 errx(1, "%s: not a terminal", ttypath); 246 ttydev = sb.st_rdev; 247 break; 248 } 249 case 'U': 250 uids = getuids(optarg, &nuids); 251 xflg++; /* XXX: intuitive? */ 252 break; 253 case 'u': 254 parsefmt(ufmt); 255 sortby = SORTCPU; 256 _fmt = 1; 257 ufmt[0] = '\0'; 258 break; 259 case 'v': 260 parsefmt(vfmt); 261 sortby = SORTMEM; 262 _fmt = 1; 263 vfmt[0] = '\0'; 264 break; 265 case 'w': 266 if (wflag) 267 termwidth = UNLIMITED; 268 else if (termwidth < 131) 269 termwidth = 131; 270 wflag++; 271 break; 272 case 'x': 273 xflg = 1; 274 break; 275 case 'Z': 276 parsefmt(Zfmt); 277 Zfmt[0] = '\0'; 278 break; 279 case '?': 280 default: 281 usage(); 282 } 283 argc -= optind; 284 argv += optind; 285 286#define BACKWARD_COMPATIBILITY 287#ifdef BACKWARD_COMPATIBILITY 288 if (*argv) { 289 nlistf = *argv; 290 if (*++argv) { 291 memf = *argv; 292 } 293 } 294#endif 295 /* 296 * Discard setgid privileges if not the running kernel so that bad 297 * guys can't print interesting stuff from kernel memory. 298 */ 299 if (dropgid) { 300 setgid(getgid()); 301 setuid(getuid()); 302 } 303 304 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 305 if (kd == 0) 306 errx(1, "%s", errbuf); 307 308 if (!_fmt) 309 parsefmt(dfmt); 310 311 /* XXX - should be cleaner */ 312 if (!all && ttydev == NODEV && pid == -1 && !nuids) { 313 if ((uids = malloc(sizeof (*uids))) == NULL) 314 err(1, "malloc"); 315 nuids = 1; 316 *uids = getuid(); 317 } 318 319 /* 320 * scan requested variables, noting what structures are needed, 321 * and adjusting header widths as appropriate. 322 */ 323 scanvars(); 324 /* 325 * get proc list 326 */ 327 if (nuids == 1) { 328 what = KERN_PROC_UID; 329 flag = *uids; 330 } else if (ttydev != NODEV) { 331 what = KERN_PROC_TTY; 332 flag = ttydev; 333 } else if (pid != -1) { 334 what = KERN_PROC_PID; 335 flag = pid; 336 } else { 337 what = KERN_PROC_ALL; 338 flag = 0; 339 } 340 /* 341 * select procs 342 */ 343 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0 || nentries < 0) 344 errx(1, "%s", kvm_geterr(kd)); 345 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 346 err(1, NULL); 347 for (i = nentries; --i >= 0; ++kp) { 348 kinfo[i].ki_p = kp; 349 if (needuser) 350 saveuser(&kinfo[i]); 351 dynsizevars(&kinfo[i]); 352 } 353 354 sizevars(); 355 356 /* 357 * print header 358 */ 359 printheader(); 360 if (nentries == 0) 361 exit(1); 362 /* 363 * sort proc list 364 */ 365 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 366 /* 367 * for each proc, call each variable output function. 368 */ 369 for (i = lineno = 0; i < nentries; i++) { 370 if (xflg == 0 && ((&kinfo[i])->ki_p->ki_tdev == NODEV || 371 ((&kinfo[i])->ki_p->ki_flag & P_CONTROLT ) == 0)) 372 continue; 373 if (nuids > 1) { 374 for (uid = 0; uid < nuids; uid++) 375 if ((&kinfo[i])->ki_p->ki_uid == uids[uid]) 376 break; 377 if (uid == nuids) 378 continue; 379 } 380 for (vent = vhead; vent; vent = vent->next) { 381 (vent->var->oproc)(&kinfo[i], vent); 382 if (vent->next != NULL) 383 (void)putchar(' '); 384 } 385 (void)putchar('\n'); 386 if (prtheader && lineno++ == prtheader - 4) { 387 (void)putchar('\n'); 388 printheader(); 389 lineno = 0; 390 } 391 } 392 free(uids); 393 lomac_stop(); 394 395 exit(eval); 396} 397 398uid_t * 399getuids(const char *arg, int *nuids) 400{ 401 char name[UT_NAMESIZE + 1]; 402 struct passwd *pwd; 403 uid_t *uids, *moreuids; 404 int alloc; 405 size_t l; 406 407 408 alloc = 0; 409 *nuids = 0; 410 uids = NULL; 411 for (; (l = strcspn(arg, SEP)) > 0; arg += l + strspn(arg + l, SEP)) { 412 if (l >= sizeof name) { 413 warnx("%.*s: name too long", (int)l, arg); 414 continue; 415 } 416 strncpy(name, arg, l); 417 name[l] = '\0'; 418 if ((pwd = getpwnam(name)) == NULL) { 419 warnx("%s: no such user", name); 420 continue; 421 } 422 if (*nuids >= alloc) { 423 alloc = (alloc + 1) << 1; 424 moreuids = realloc(uids, alloc * sizeof (*uids)); 425 if (moreuids == NULL) { 426 free(uids); 427 err(1, "realloc"); 428 } 429 uids = moreuids; 430 } 431 uids[(*nuids)++] = pwd->pw_uid; 432 } 433 endpwent(); 434 435 if (!*nuids) 436 errx(1, "No users specified"); 437 438 return uids; 439} 440 441static void 442scanvars(void) 443{ 444 struct varent *vent; 445 VAR *v; 446 447 for (vent = vhead; vent; vent = vent->next) { 448 v = vent->var; 449 if (v->flag & DSIZ) { 450 v->dwidth = v->width; 451 v->width = 0; 452 } 453 if (v->flag & USER) 454 needuser = 1; 455 if (v->flag & COMM) 456 needcomm = 1; 457 } 458} 459 460static void 461dynsizevars(KINFO *ki) 462{ 463 struct varent *vent; 464 VAR *v; 465 int i; 466 467 for (vent = vhead; vent; vent = vent->next) { 468 v = vent->var; 469 if (!(v->flag & DSIZ)) 470 continue; 471 i = (v->sproc)( ki); 472 if (v->width < i) 473 v->width = i; 474 if (v->width > v->dwidth) 475 v->width = v->dwidth; 476 } 477} 478 479static void 480sizevars(void) 481{ 482 struct varent *vent; 483 VAR *v; 484 int i; 485 486 for (vent = vhead; vent; vent = vent->next) { 487 v = vent->var; 488 i = strlen(v->header); 489 if (v->width < i) 490 v->width = i; 491 totwidth += v->width + 1; /* +1 for space */ 492 } 493 totwidth--; 494} 495 496static const char * 497fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki, 498 char *comm, int maxlen) 499{ 500 const char *s; 501 502 s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen); 503 if (s == NULL) 504 err(1, NULL); 505 return (s); 506} 507 508#define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM)) 509 510static void 511saveuser(KINFO *ki) 512{ 513 514 if (ki->ki_p->ki_sflag & PS_INMEM) { 515 /* 516 * The u-area might be swapped out, and we can't get 517 * at it because we have a crashdump and no swap. 518 * If it's here fill in these fields, otherwise, just 519 * leave them 0. 520 */ 521 ki->ki_valid = 1; 522 } else 523 ki->ki_valid = 0; 524 /* 525 * save arguments if needed 526 */ 527 if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) { 528 ki->ki_args = strdup(fmt(kvm_getargv, ki, ki->ki_p->ki_comm, 529 MAXCOMLEN)); 530 } else if (needcomm) { 531 asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm); 532 } else { 533 ki->ki_args = NULL; 534 } 535 if (needenv && UREADOK(ki)) { 536 ki->ki_env = strdup(fmt(kvm_getenvv, ki, (char *)NULL, 0)); 537 } else if (needenv) { 538 ki->ki_env = malloc(3); 539 strcpy(ki->ki_env, "()"); 540 } else { 541 ki->ki_env = NULL; 542 } 543} 544 545static int 546pscomp(const void *a, const void *b) 547{ 548 int i; 549#define VSIZE(k) ((k)->ki_p->ki_dsize + (k)->ki_p->ki_ssize + \ 550 (k)->ki_p->ki_tsize) 551 552 if (sortby == SORTCPU) 553 return (getpcpu((const KINFO *)b) - getpcpu((const KINFO *)a)); 554 if (sortby == SORTMEM) 555 return (VSIZE((const KINFO *)b) - VSIZE((const KINFO *)a)); 556 i = (int)((const KINFO *)a)->ki_p->ki_tdev - (int)((const KINFO *)b)->ki_p->ki_tdev; 557 if (i == 0) 558 i = ((const KINFO *)a)->ki_p->ki_pid - ((const KINFO *)b)->ki_p->ki_pid; 559 return (i); 560} 561 562/* 563 * ICK (all for getopt), would rather hide the ugliness 564 * here than taint the main code. 565 * 566 * ps foo -> ps -foo 567 * ps 34 -> ps -p34 568 * 569 * The old convention that 't' with no trailing tty arg means the users 570 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 571 * feature is available with the option 'T', which takes no argument. 572 */ 573static char * 574kludge_oldps_options(char *s) 575{ 576 size_t len; 577 char *newopts, *ns, *cp; 578 579 len = strlen(s); 580 if ((newopts = ns = malloc(len + 2)) == NULL) 581 err(1, NULL); 582 /* 583 * options begin with '-' 584 */ 585 if (*s != '-') 586 *ns++ = '-'; /* add option flag */ 587 /* 588 * gaze to end of argv[1] 589 */ 590 cp = s + len - 1; 591 /* 592 * if last letter is a 't' flag with no argument (in the context 593 * of the oldps options -- option string NOT starting with a '-' -- 594 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 595 * 596 * However, if a flag accepting a string argument is found in the 597 * option string, the remainder of the string is the argument to 598 * that flag; do not modify that argument. 599 */ 600 if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-') 601 *cp = 'T'; 602 else { 603 /* 604 * otherwise check for trailing number, which *may* be a 605 * pid. 606 */ 607 while (cp >= s && isdigit(*cp)) 608 --cp; 609 } 610 cp++; 611 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 612 ns += cp - s; 613 /* 614 * if there's a trailing number, and not a preceding 'p' (pid) or 615 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 616 */ 617 if (isdigit(*cp) && 618 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 619 (cp - 1 == s || cp[-2] != 't')) 620 *ns++ = 'p'; 621 (void)strcpy(ns, cp); /* and append the number */ 622 623 return (newopts); 624} 625 626static void 627usage(void) 628{ 629 630 (void)fprintf(stderr, "%s\n%s\n%s\n", 631 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 632 " [-M core] [-N system]", 633 " ps [-L]"); 634 exit(1); 635} 636