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 35 static 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 42 static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 43 #endif 44 static const char rcsid[] = 45 "$Id: ps.c,v 1.24 1998/05/15 06:29:17 charnier Exp $"; 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 <nlist.h> 63 #include <paths.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 #include <locale.h> 69 #include <pwd.h> 70 71 #include "ps.h" 72 73 KINFO *kinfo; 74 struct varent *vhead, *vtail; 75 76 int eval; /* exit value */ 77 int cflag; /* -c */ 78 int rawcpu; /* -C */ 79 int sumrusage; /* -S */ 80 int termwidth; /* width of screen (0 == infinity) */ 81 int totwidth; /* calculated width of requested variables */ 82 83 static int needuser, needcomm, needenv; 84 #if defined(LAZY_PS) 85 static int forceuread=0; 86 #else 87 static int forceuread=1; 88 #endif 89 90 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 91 92 static char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int), 93 KINFO *, char *, int)); 94 static char *kludge_oldps_options __P((char *)); 95 static int pscomp __P((const void *, const void *)); 96 static void saveuser __P((KINFO *)); 97 static void scanvars __P((void)); 98 static void dynsizevars __P((KINFO *)); 99 static void sizevars __P((void)); 100 static void usage __P((void)); 101 102 char dfmt[] = "pid tt state time command"; 103 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 104 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 105 char o1[] = "pid"; 106 char o2[] = "tt state time command"; 107 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 108 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 109 110 kvm_t *kd; 111 112 int 113 main(argc, argv) 114 int argc; 115 char *argv[]; 116 { 117 struct kinfo_proc *kp; 118 struct varent *vent; 119 struct winsize ws; 120 struct passwd *pwd; 121 dev_t ttydev; 122 pid_t pid; 123 uid_t uid; 124 int all, ch, flag, i, fmt, lineno, nentries, dropgid; 125 int prtheader, wflag, what, xflg; 126 char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX]; 127 128 (void) setlocale(LC_ALL, ""); 129 130 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 131 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 132 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 133 ws.ws_col == 0) 134 termwidth = 79; 135 else 136 termwidth = ws.ws_col - 1; 137 138 if (argc > 1) 139 argv[1] = kludge_oldps_options(argv[1]); 140 141 all = fmt = prtheader = wflag = xflg = 0; 142 pid = -1; 143 uid = (uid_t) -1; 144 ttydev = NODEV; 145 dropgid = 0; 146 memf = nlistf = swapf = _PATH_DEVNULL; 147 while ((ch = getopt(argc, argv, 148 #if defined(LAZY_PS) 149 "aCcefghjLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1) 150 #else 151 "aCceghjLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1) 152 #endif 153 switch((char)ch) { 154 case 'a': 155 all = 1; 156 break; 157 case 'C': 158 rawcpu = 1; 159 break; 160 case 'c': 161 cflag = 1; 162 break; 163 case 'e': /* XXX set ufmt */ 164 needenv = 1; 165 break; 166 case 'g': 167 break; /* no-op */ 168 case 'h': 169 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 170 break; 171 case 'j': 172 parsefmt(jfmt); 173 fmt = 1; 174 jfmt[0] = '\0'; 175 break; 176 case 'L': 177 showkey(); 178 exit(0); 179 case 'l': 180 parsefmt(lfmt); 181 fmt = 1; 182 lfmt[0] = '\0'; 183 break; 184 case 'M': 185 memf = optarg; 186 dropgid = 1; 187 break; 188 case 'm': 189 sortby = SORTMEM; 190 break; 191 case 'N': 192 nlistf = optarg; 193 dropgid = 1; 194 break; 195 case 'O': 196 parsefmt(o1); 197 parsefmt(optarg); 198 parsefmt(o2); 199 o1[0] = o2[0] = '\0'; 200 fmt = 1; 201 break; 202 case 'o': 203 parsefmt(optarg); 204 fmt = 1; 205 break; 206 #if defined(LAZY_PS) 207 case 'f': 208 if (getuid() == 0 || getgid() == 0) 209 forceuread = 1; 210 break; 211 #endif 212 case 'p': 213 pid = atol(optarg); 214 xflg = 1; 215 break; 216 case 'r': 217 sortby = SORTCPU; 218 break; 219 case 'S': 220 sumrusage = 1; 221 break; 222 case 'T': 223 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 224 errx(1, "stdin: not a terminal"); 225 /* FALLTHROUGH */ 226 case 't': { 227 struct stat sb; 228 char *ttypath, pathbuf[MAXPATHLEN]; 229 230 if (strcmp(optarg, "co") == 0) 231 ttypath = _PATH_CONSOLE; 232 else if (*optarg != '/') 233 (void)snprintf(ttypath = pathbuf, 234 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 235 else 236 ttypath = optarg; 237 if (stat(ttypath, &sb) == -1) 238 err(1, "%s", ttypath); 239 if (!S_ISCHR(sb.st_mode)) 240 errx(1, "%s: not a terminal", ttypath); 241 ttydev = sb.st_rdev; 242 break; 243 } 244 case 'U': 245 pwd = getpwnam(optarg); 246 if (pwd == NULL) 247 errx(1, "%s: no such user", optarg); 248 uid = pwd->pw_uid; 249 endpwent(); 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 swapf = optarg; 266 dropgid = 1; 267 break; 268 case 'w': 269 if (wflag) 270 termwidth = UNLIMITED; 271 else if (termwidth < 131) 272 termwidth = 131; 273 wflag++; 274 break; 275 case 'x': 276 xflg = 1; 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 if (*++argv) 292 swapf = *argv; 293 } 294 } 295 #endif 296 /* 297 * Discard setgid privileges if not the running kernel so that bad 298 * guys can't print interesting stuff from kernel memory. 299 */ 300 if (dropgid) { 301 setgid(getgid()); 302 setuid(getuid()); 303 } 304 305 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 306 if (kd == 0) 307 errx(1, "%s", errbuf); 308 309 if (!fmt) 310 parsefmt(dfmt); 311 312 /* XXX - should be cleaner */ 313 if (!all && ttydev == NODEV && pid == -1 && uid == (uid_t)-1) 314 uid = getuid(); 315 316 /* 317 * scan requested variables, noting what structures are needed, 318 * and adjusting header widths as appropiate. 319 */ 320 scanvars(); 321 /* 322 * get proc list 323 */ 324 if (uid != (uid_t) -1) { 325 what = KERN_PROC_UID; 326 flag = uid; 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) 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(0); 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 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 368 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 369 continue; 370 for (vent = vhead; vent; vent = vent->next) { 371 (vent->var->oproc)(&kinfo[i], vent); 372 if (vent->next != NULL) 373 (void)putchar(' '); 374 } 375 (void)putchar('\n'); 376 if (prtheader && lineno++ == prtheader - 4) { 377 (void)putchar('\n'); 378 printheader(); 379 lineno = 0; 380 } 381 } 382 exit(eval); 383 } 384 385 static void 386 scanvars() 387 { 388 struct varent *vent; 389 VAR *v; 390 391 for (vent = vhead; vent; vent = vent->next) { 392 v = vent->var; 393 if (v->flag & DSIZ) { 394 v->dwidth = v->width; 395 v->width = 0; 396 } 397 if (v->flag & USER) 398 needuser = 1; 399 if (v->flag & COMM) 400 needcomm = 1; 401 } 402 } 403 404 static void 405 dynsizevars(ki) 406 KINFO *ki; 407 { 408 struct varent *vent; 409 VAR *v; 410 int i; 411 412 for (vent = vhead; vent; vent = vent->next) { 413 v = vent->var; 414 if (!(v->flag & DSIZ)) 415 continue; 416 i = (v->sproc)( ki); 417 if (v->width < i) 418 v->width = i; 419 if (v->width > v->dwidth) 420 v->width = v->dwidth; 421 } 422 } 423 424 static void 425 sizevars() 426 { 427 struct varent *vent; 428 VAR *v; 429 int i; 430 431 for (vent = vhead; vent; vent = vent->next) { 432 v = vent->var; 433 i = strlen(v->header); 434 if (v->width < i) 435 v->width = i; 436 totwidth += v->width + 1; /* +1 for space */ 437 } 438 totwidth--; 439 } 440 441 static char * 442 fmt(fn, ki, comm, maxlen) 443 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 444 KINFO *ki; 445 char *comm; 446 int maxlen; 447 { 448 char *s; 449 450 if ((s = 451 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 452 err(1, NULL); 453 return (s); 454 } 455 456 #define UREADOK(ki) (forceuread || (KI_PROC(ki)->p_flag & P_INMEM)) 457 458 static void 459 saveuser(ki) 460 KINFO *ki; 461 { 462 struct pstats pstats; 463 struct usave *usp; 464 struct user *u_addr = (struct user *)USRSTACK; 465 466 usp = &ki->ki_u; 467 if (UREADOK(ki) && kvm_uread(kd, KI_PROC(ki), (unsigned long)&u_addr->u_stats, 468 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 469 /* 470 * The u-area might be swapped out, and we can't get 471 * at it because we have a crashdump and no swap. 472 * If it's here fill in these fields, otherwise, just 473 * leave them 0. 474 */ 475 usp->u_start = pstats.p_start; 476 usp->u_ru = pstats.p_ru; 477 usp->u_cru = pstats.p_cru; 478 usp->u_valid = 1; 479 } else 480 usp->u_valid = 0; 481 /* 482 * save arguments if needed 483 */ 484 if (needcomm && UREADOK(ki)) { 485 ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm, 486 MAXCOMLEN); 487 } else if (needcomm) { 488 ki->ki_args = malloc(strlen(KI_PROC(ki)->p_comm) + 3); 489 sprintf(ki->ki_args, "(%s)", KI_PROC(ki)->p_comm); 490 } else { 491 ki->ki_args = NULL; 492 } 493 if (needenv && UREADOK(ki)) { 494 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 495 } else if (needenv) { 496 ki->ki_env = malloc(3); 497 strcpy(ki->ki_env, "()"); 498 } else { 499 ki->ki_env = NULL; 500 } 501 } 502 503 static int 504 pscomp(a, b) 505 const void *a, *b; 506 { 507 int i; 508 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 509 KI_EPROC(k)->e_vm.vm_tsize) 510 511 if (sortby == SORTCPU) 512 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 513 if (sortby == SORTMEM) 514 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 515 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 516 if (i == 0) 517 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 518 return (i); 519 } 520 521 /* 522 * ICK (all for getopt), would rather hide the ugliness 523 * here than taint the main code. 524 * 525 * ps foo -> ps -foo 526 * ps 34 -> ps -p34 527 * 528 * The old convention that 't' with no trailing tty arg means the users 529 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 530 * feature is available with the option 'T', which takes no argument. 531 */ 532 static char * 533 kludge_oldps_options(s) 534 char *s; 535 { 536 size_t len; 537 char *newopts, *ns, *cp; 538 539 len = strlen(s); 540 if ((newopts = ns = malloc(len + 2)) == NULL) 541 err(1, NULL); 542 /* 543 * options begin with '-' 544 */ 545 if (*s != '-') 546 *ns++ = '-'; /* add option flag */ 547 /* 548 * gaze to end of argv[1] 549 */ 550 cp = s + len - 1; 551 /* 552 * if last letter is a 't' flag with no argument (in the context 553 * of the oldps options -- option string NOT starting with a '-' -- 554 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 555 */ 556 if (*cp == 't' && *s != '-') 557 *cp = 'T'; 558 else { 559 /* 560 * otherwise check for trailing number, which *may* be a 561 * pid. 562 */ 563 while (cp >= s && isdigit(*cp)) 564 --cp; 565 } 566 cp++; 567 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 568 ns += cp - s; 569 /* 570 * if there's a trailing number, and not a preceding 'p' (pid) or 571 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 572 */ 573 if (isdigit(*cp) && 574 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 575 (cp - 1 == s || cp[-2] != 't')) 576 *ns++ = 'p'; 577 (void)strcpy(ns, cp); /* and append the number */ 578 579 return (newopts); 580 } 581 582 static void 583 usage() 584 { 585 586 (void)fprintf(stderr, "%s\n%s\n%s\n", 587 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 588 " [-M core] [-N system] [-W swap]", 589 " ps [-L]"); 590 exit(1); 591 } 592