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 * $Id: ps.c,v 1.19 1997/04/29 05:26:05 jkh Exp $ 34 */ 35 36 #ifndef lint 37 static char const copyright[] = 38 "@(#) Copyright (c) 1990, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 static char const sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 44 #endif /* not lint */ 45 46 #include <sys/param.h> 47 #include <sys/user.h> 48 #include <sys/time.h> 49 #include <sys/resource.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 <errno.h> 57 #include <fcntl.h> 58 #include <kvm.h> 59 #include <limits.h> 60 #include <nlist.h> 61 #include <paths.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 #include <locale.h> 67 #include <pwd.h> 68 69 #include "ps.h" 70 71 #ifdef P_PPWAIT 72 #define NEWVM 73 #endif 74 75 KINFO *kinfo; 76 struct varent *vhead, *vtail; 77 78 int eval; /* exit value */ 79 int cflag; /* -c */ 80 int rawcpu; /* -C */ 81 int sumrusage; /* -S */ 82 int termwidth; /* width of screen (0 == infinity) */ 83 int totwidth; /* calculated width of requested variables */ 84 85 static int needuser, needcomm, needenv; 86 87 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 88 89 static char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int), 90 KINFO *, char *, int)); 91 static char *kludge_oldps_options __P((char *)); 92 static int pscomp __P((const void *, const void *)); 93 static void saveuser __P((KINFO *)); 94 static void scanvars __P((void)); 95 static void dynsizevars __P((KINFO *)); 96 static void sizevars __P((void)); 97 static void usage __P((void)); 98 99 char dfmt[] = "pid tt state time command"; 100 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 101 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 102 char o1[] = "pid"; 103 char o2[] = "tt state time command"; 104 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 105 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 106 107 kvm_t *kd; 108 109 int 110 main(argc, argv) 111 int argc; 112 char *argv[]; 113 { 114 struct kinfo_proc *kp; 115 struct varent *vent; 116 struct winsize ws; 117 struct passwd *pwd; 118 dev_t ttydev; 119 pid_t pid; 120 uid_t uid; 121 int all, ch, flag, i, fmt, lineno, nentries; 122 int prtheader, wflag, what, xflg; 123 char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX]; 124 125 (void) setlocale(LC_ALL, ""); 126 127 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 128 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 129 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 130 ws.ws_col == 0) 131 termwidth = 79; 132 else 133 termwidth = ws.ws_col - 1; 134 135 if (argc > 1) 136 argv[1] = kludge_oldps_options(argv[1]); 137 138 all = fmt = prtheader = wflag = xflg = 0; 139 pid = -1; 140 uid = (uid_t) -1; 141 ttydev = NODEV; 142 memf = nlistf = swapf = NULL; 143 while ((ch = getopt(argc, argv, 144 "aCceghjLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1) 145 switch((char)ch) { 146 case 'a': 147 all = 1; 148 break; 149 case 'C': 150 rawcpu = 1; 151 break; 152 case 'c': 153 cflag = 1; 154 break; 155 case 'e': /* XXX set ufmt */ 156 needenv = 1; 157 break; 158 case 'g': 159 break; /* no-op */ 160 case 'h': 161 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 162 break; 163 case 'j': 164 parsefmt(jfmt); 165 fmt = 1; 166 jfmt[0] = '\0'; 167 break; 168 case 'L': 169 showkey(); 170 exit(0); 171 case 'l': 172 parsefmt(lfmt); 173 fmt = 1; 174 lfmt[0] = '\0'; 175 break; 176 case 'M': 177 memf = optarg; 178 break; 179 case 'm': 180 sortby = SORTMEM; 181 break; 182 case 'N': 183 nlistf = optarg; 184 break; 185 case 'O': 186 parsefmt(o1); 187 parsefmt(optarg); 188 parsefmt(o2); 189 o1[0] = o2[0] = '\0'; 190 fmt = 1; 191 break; 192 case 'o': 193 parsefmt(optarg); 194 fmt = 1; 195 break; 196 case 'p': 197 pid = atol(optarg); 198 xflg = 1; 199 break; 200 case 'r': 201 sortby = SORTCPU; 202 break; 203 case 'S': 204 sumrusage = 1; 205 break; 206 case 'T': 207 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 208 errx(1, "stdin: not a terminal"); 209 /* FALLTHROUGH */ 210 case 't': { 211 struct stat sb; 212 char *ttypath, pathbuf[MAXPATHLEN]; 213 214 if (strcmp(optarg, "co") == 0) 215 ttypath = _PATH_CONSOLE; 216 else if (*optarg != '/') 217 (void)snprintf(ttypath = pathbuf, 218 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 219 else 220 ttypath = optarg; 221 if (stat(ttypath, &sb) == -1) 222 err(1, "%s", ttypath); 223 if (!S_ISCHR(sb.st_mode)) 224 errx(1, "%s: not a terminal", ttypath); 225 ttydev = sb.st_rdev; 226 break; 227 } 228 case 'U': 229 pwd = getpwnam(optarg); 230 if (pwd == NULL) 231 errx(1, "%s: no such user", optarg); 232 uid = pwd->pw_uid; 233 endpwent(); 234 xflg++; /* XXX: intuitive? */ 235 break; 236 case 'u': 237 parsefmt(ufmt); 238 sortby = SORTCPU; 239 fmt = 1; 240 ufmt[0] = '\0'; 241 break; 242 case 'v': 243 parsefmt(vfmt); 244 sortby = SORTMEM; 245 fmt = 1; 246 vfmt[0] = '\0'; 247 break; 248 case 'W': 249 swapf = optarg; 250 break; 251 case 'w': 252 if (wflag) 253 termwidth = UNLIMITED; 254 else if (termwidth < 131) 255 termwidth = 131; 256 wflag++; 257 break; 258 case 'x': 259 xflg = 1; 260 break; 261 case '?': 262 default: 263 usage(); 264 } 265 argc -= optind; 266 argv += optind; 267 268 #define BACKWARD_COMPATIBILITY 269 #ifdef BACKWARD_COMPATIBILITY 270 if (*argv) { 271 nlistf = *argv; 272 if (*++argv) { 273 memf = *argv; 274 if (*++argv) 275 swapf = *argv; 276 } 277 } 278 #endif 279 /* 280 * Discard setgid privileges if not the running kernel so that bad 281 * guys can't print interesting stuff from kernel memory. 282 */ 283 if (nlistf != NULL || memf != NULL || swapf != NULL) 284 setgid(getgid()); 285 286 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 287 if (kd == 0) 288 errx(1, "%s", errbuf); 289 290 if (!fmt) 291 parsefmt(dfmt); 292 293 /* XXX - should be cleaner */ 294 if (!all && ttydev == NODEV && pid == -1 && uid == (uid_t)-1) 295 uid = getuid(); 296 297 /* 298 * scan requested variables, noting what structures are needed, 299 * and adjusting header widths as appropiate. 300 */ 301 scanvars(); 302 /* 303 * get proc list 304 */ 305 if (uid != (uid_t) -1) { 306 what = KERN_PROC_UID; 307 flag = uid; 308 } else if (ttydev != NODEV) { 309 what = KERN_PROC_TTY; 310 flag = ttydev; 311 } else if (pid != -1) { 312 what = KERN_PROC_PID; 313 flag = pid; 314 } else { 315 what = KERN_PROC_ALL; 316 flag = 0; 317 } 318 /* 319 * select procs 320 */ 321 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 322 errx(1, "%s", kvm_geterr(kd)); 323 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 324 err(1, NULL); 325 for (i = nentries; --i >= 0; ++kp) { 326 kinfo[i].ki_p = kp; 327 if (needuser) 328 saveuser(&kinfo[i]); 329 dynsizevars(&kinfo[i]); 330 } 331 332 sizevars(); 333 334 /* 335 * print header 336 */ 337 printheader(); 338 if (nentries == 0) 339 exit(0); 340 /* 341 * sort proc list 342 */ 343 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 344 /* 345 * for each proc, call each variable output function. 346 */ 347 for (i = lineno = 0; i < nentries; i++) { 348 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 349 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 350 continue; 351 for (vent = vhead; vent; vent = vent->next) { 352 (vent->var->oproc)(&kinfo[i], vent); 353 if (vent->next != NULL) 354 (void)putchar(' '); 355 } 356 (void)putchar('\n'); 357 if (prtheader && lineno++ == prtheader - 4) { 358 (void)putchar('\n'); 359 printheader(); 360 lineno = 0; 361 } 362 } 363 exit(eval); 364 } 365 366 static void 367 scanvars() 368 { 369 struct varent *vent; 370 VAR *v; 371 372 for (vent = vhead; vent; vent = vent->next) { 373 v = vent->var; 374 if (v->flag & DSIZ) { 375 v->dwidth = v->width; 376 v->width = 0; 377 } 378 if (v->flag & USER) 379 needuser = 1; 380 if (v->flag & COMM) 381 needcomm = 1; 382 } 383 } 384 385 static void 386 dynsizevars(ki) 387 KINFO *ki; 388 { 389 struct varent *vent; 390 VAR *v; 391 int i; 392 393 for (vent = vhead; vent; vent = vent->next) { 394 v = vent->var; 395 if (!(v->flag & DSIZ)) 396 continue; 397 i = (v->sproc)( ki); 398 if (v->width < i) 399 v->width = i; 400 if (v->width > v->dwidth) 401 v->width = v->dwidth; 402 } 403 } 404 405 static void 406 sizevars() 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 i = strlen(v->header); 415 if (v->width < i) 416 v->width = i; 417 totwidth += v->width + 1; /* +1 for space */ 418 } 419 totwidth--; 420 } 421 422 static char * 423 fmt(fn, ki, comm, maxlen) 424 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 425 KINFO *ki; 426 char *comm; 427 int maxlen; 428 { 429 char *s; 430 431 if ((s = 432 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 433 err(1, NULL); 434 return (s); 435 } 436 437 static void 438 saveuser(ki) 439 KINFO *ki; 440 { 441 struct pstats pstats; 442 struct usave *usp; 443 struct user *u_addr = (struct user *)USRSTACK; 444 445 usp = &ki->ki_u; 446 if (kvm_uread(kd, KI_PROC(ki), (unsigned long)&u_addr->u_stats, 447 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 448 /* 449 * The u-area might be swapped out, and we can't get 450 * at it because we have a crashdump and no swap. 451 * If it's here fill in these fields, otherwise, just 452 * leave them 0. 453 */ 454 usp->u_start = pstats.p_start; 455 usp->u_ru = pstats.p_ru; 456 usp->u_cru = pstats.p_cru; 457 usp->u_valid = 1; 458 } else 459 usp->u_valid = 0; 460 /* 461 * save arguments if needed 462 */ 463 if (needcomm) 464 ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm, 465 MAXCOMLEN); 466 else 467 ki->ki_args = NULL; 468 if (needenv) 469 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 470 else 471 ki->ki_env = NULL; 472 } 473 474 static int 475 pscomp(a, b) 476 const void *a, *b; 477 { 478 int i; 479 #ifdef NEWVM 480 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 481 KI_EPROC(k)->e_vm.vm_tsize) 482 #else 483 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 484 #endif 485 486 if (sortby == SORTCPU) 487 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 488 if (sortby == SORTMEM) 489 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 490 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 491 if (i == 0) 492 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 493 return (i); 494 } 495 496 /* 497 * ICK (all for getopt), would rather hide the ugliness 498 * here than taint the main code. 499 * 500 * ps foo -> ps -foo 501 * ps 34 -> ps -p34 502 * 503 * The old convention that 't' with no trailing tty arg means the users 504 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 505 * feature is available with the option 'T', which takes no argument. 506 */ 507 static char * 508 kludge_oldps_options(s) 509 char *s; 510 { 511 size_t len; 512 char *newopts, *ns, *cp; 513 514 len = strlen(s); 515 if ((newopts = ns = malloc(len + 2)) == NULL) 516 err(1, NULL); 517 /* 518 * options begin with '-' 519 */ 520 if (*s != '-') 521 *ns++ = '-'; /* add option flag */ 522 /* 523 * gaze to end of argv[1] 524 */ 525 cp = s + len - 1; 526 /* 527 * if last letter is a 't' flag with no argument (in the context 528 * of the oldps options -- option string NOT starting with a '-' -- 529 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 530 */ 531 if (*cp == 't' && *s != '-') 532 *cp = 'T'; 533 else { 534 /* 535 * otherwise check for trailing number, which *may* be a 536 * pid. 537 */ 538 while (cp >= s && isdigit(*cp)) 539 --cp; 540 } 541 cp++; 542 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 543 ns += cp - s; 544 /* 545 * if there's a trailing number, and not a preceding 'p' (pid) or 546 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 547 */ 548 if (isdigit(*cp) && 549 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 550 (cp - 1 == s || cp[-2] != 't')) 551 *ns++ = 'p'; 552 (void)strcpy(ns, cp); /* and append the number */ 553 554 return (newopts); 555 } 556 557 static void 558 usage() 559 { 560 561 (void)fprintf(stderr, "%s\n%s\n%s\n", 562 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 563 " [-M core] [-N system] [-W swap]", 564 " ps [-L]"); 565 exit(1); 566 } 567