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 1.20 1997/06/06 06:40:06 charnier 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 KINFO *kinfo; 72 struct varent *vhead, *vtail; 73 74 int eval; /* exit value */ 75 int cflag; /* -c */ 76 int rawcpu; /* -C */ 77 int sumrusage; /* -S */ 78 int termwidth; /* width of screen (0 == infinity) */ 79 int totwidth; /* calculated width of requested variables */ 80 81 static int needuser, needcomm, needenv; 82 83 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 84 85 static char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int), 86 KINFO *, char *, int)); 87 static char *kludge_oldps_options __P((char *)); 88 static int pscomp __P((const void *, const void *)); 89 static void saveuser __P((KINFO *)); 90 static void scanvars __P((void)); 91 static void dynsizevars __P((KINFO *)); 92 static void sizevars __P((void)); 93 static void usage __P((void)); 94 95 char dfmt[] = "pid tt state time command"; 96 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 97 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 98 char o1[] = "pid"; 99 char o2[] = "tt state time command"; 100 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 101 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 102 103 kvm_t *kd; 104 105 int 106 main(argc, argv) 107 int argc; 108 char *argv[]; 109 { 110 struct kinfo_proc *kp; 111 struct varent *vent; 112 struct winsize ws; 113 struct passwd *pwd; 114 dev_t ttydev; 115 pid_t pid; 116 uid_t uid; 117 int all, ch, flag, i, fmt, lineno, nentries; 118 int prtheader, wflag, what, xflg; 119 char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX]; 120 121 (void) setlocale(LC_ALL, ""); 122 123 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 124 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 125 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 126 ws.ws_col == 0) 127 termwidth = 79; 128 else 129 termwidth = ws.ws_col - 1; 130 131 if (argc > 1) 132 argv[1] = kludge_oldps_options(argv[1]); 133 134 all = fmt = prtheader = wflag = xflg = 0; 135 pid = -1; 136 uid = (uid_t) -1; 137 ttydev = NODEV; 138 memf = nlistf = swapf = NULL; 139 while ((ch = getopt(argc, argv, 140 "aCceghjLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1) 141 switch((char)ch) { 142 case 'a': 143 all = 1; 144 break; 145 case 'C': 146 rawcpu = 1; 147 break; 148 case 'c': 149 cflag = 1; 150 break; 151 case 'e': /* XXX set ufmt */ 152 needenv = 1; 153 break; 154 case 'g': 155 break; /* no-op */ 156 case 'h': 157 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 158 break; 159 case 'j': 160 parsefmt(jfmt); 161 fmt = 1; 162 jfmt[0] = '\0'; 163 break; 164 case 'L': 165 showkey(); 166 exit(0); 167 case 'l': 168 parsefmt(lfmt); 169 fmt = 1; 170 lfmt[0] = '\0'; 171 break; 172 case 'M': 173 memf = optarg; 174 break; 175 case 'm': 176 sortby = SORTMEM; 177 break; 178 case 'N': 179 nlistf = optarg; 180 break; 181 case 'O': 182 parsefmt(o1); 183 parsefmt(optarg); 184 parsefmt(o2); 185 o1[0] = o2[0] = '\0'; 186 fmt = 1; 187 break; 188 case 'o': 189 parsefmt(optarg); 190 fmt = 1; 191 break; 192 case 'p': 193 pid = atol(optarg); 194 xflg = 1; 195 break; 196 case 'r': 197 sortby = SORTCPU; 198 break; 199 case 'S': 200 sumrusage = 1; 201 break; 202 case 'T': 203 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 204 errx(1, "stdin: not a terminal"); 205 /* FALLTHROUGH */ 206 case 't': { 207 struct stat sb; 208 char *ttypath, pathbuf[MAXPATHLEN]; 209 210 if (strcmp(optarg, "co") == 0) 211 ttypath = _PATH_CONSOLE; 212 else if (*optarg != '/') 213 (void)snprintf(ttypath = pathbuf, 214 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 215 else 216 ttypath = optarg; 217 if (stat(ttypath, &sb) == -1) 218 err(1, "%s", ttypath); 219 if (!S_ISCHR(sb.st_mode)) 220 errx(1, "%s: not a terminal", ttypath); 221 ttydev = sb.st_rdev; 222 break; 223 } 224 case 'U': 225 pwd = getpwnam(optarg); 226 if (pwd == NULL) 227 errx(1, "%s: no such user", optarg); 228 uid = pwd->pw_uid; 229 endpwent(); 230 xflg++; /* XXX: intuitive? */ 231 break; 232 case 'u': 233 parsefmt(ufmt); 234 sortby = SORTCPU; 235 fmt = 1; 236 ufmt[0] = '\0'; 237 break; 238 case 'v': 239 parsefmt(vfmt); 240 sortby = SORTMEM; 241 fmt = 1; 242 vfmt[0] = '\0'; 243 break; 244 case 'W': 245 swapf = optarg; 246 break; 247 case 'w': 248 if (wflag) 249 termwidth = UNLIMITED; 250 else if (termwidth < 131) 251 termwidth = 131; 252 wflag++; 253 break; 254 case 'x': 255 xflg = 1; 256 break; 257 case '?': 258 default: 259 usage(); 260 } 261 argc -= optind; 262 argv += optind; 263 264 #define BACKWARD_COMPATIBILITY 265 #ifdef BACKWARD_COMPATIBILITY 266 if (*argv) { 267 nlistf = *argv; 268 if (*++argv) { 269 memf = *argv; 270 if (*++argv) 271 swapf = *argv; 272 } 273 } 274 #endif 275 /* 276 * Discard setgid privileges if not the running kernel so that bad 277 * guys can't print interesting stuff from kernel memory. 278 */ 279 if (nlistf != NULL || memf != NULL || swapf != NULL) 280 setgid(getgid()); 281 282 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 283 if (kd == 0) 284 errx(1, "%s", errbuf); 285 286 if (!fmt) 287 parsefmt(dfmt); 288 289 /* XXX - should be cleaner */ 290 if (!all && ttydev == NODEV && pid == -1 && uid == (uid_t)-1) 291 uid = getuid(); 292 293 /* 294 * scan requested variables, noting what structures are needed, 295 * and adjusting header widths as appropiate. 296 */ 297 scanvars(); 298 /* 299 * get proc list 300 */ 301 if (uid != (uid_t) -1) { 302 what = KERN_PROC_UID; 303 flag = uid; 304 } else if (ttydev != NODEV) { 305 what = KERN_PROC_TTY; 306 flag = ttydev; 307 } else if (pid != -1) { 308 what = KERN_PROC_PID; 309 flag = pid; 310 } else { 311 what = KERN_PROC_ALL; 312 flag = 0; 313 } 314 /* 315 * select procs 316 */ 317 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 318 errx(1, "%s", kvm_geterr(kd)); 319 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 320 err(1, NULL); 321 for (i = nentries; --i >= 0; ++kp) { 322 kinfo[i].ki_p = kp; 323 if (needuser) 324 saveuser(&kinfo[i]); 325 dynsizevars(&kinfo[i]); 326 } 327 328 sizevars(); 329 330 /* 331 * print header 332 */ 333 printheader(); 334 if (nentries == 0) 335 exit(0); 336 /* 337 * sort proc list 338 */ 339 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 340 /* 341 * for each proc, call each variable output function. 342 */ 343 for (i = lineno = 0; i < nentries; i++) { 344 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 345 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 346 continue; 347 for (vent = vhead; vent; vent = vent->next) { 348 (vent->var->oproc)(&kinfo[i], vent); 349 if (vent->next != NULL) 350 (void)putchar(' '); 351 } 352 (void)putchar('\n'); 353 if (prtheader && lineno++ == prtheader - 4) { 354 (void)putchar('\n'); 355 printheader(); 356 lineno = 0; 357 } 358 } 359 exit(eval); 360 } 361 362 static void 363 scanvars() 364 { 365 struct varent *vent; 366 VAR *v; 367 368 for (vent = vhead; vent; vent = vent->next) { 369 v = vent->var; 370 if (v->flag & DSIZ) { 371 v->dwidth = v->width; 372 v->width = 0; 373 } 374 if (v->flag & USER) 375 needuser = 1; 376 if (v->flag & COMM) 377 needcomm = 1; 378 } 379 } 380 381 static void 382 dynsizevars(ki) 383 KINFO *ki; 384 { 385 struct varent *vent; 386 VAR *v; 387 int i; 388 389 for (vent = vhead; vent; vent = vent->next) { 390 v = vent->var; 391 if (!(v->flag & DSIZ)) 392 continue; 393 i = (v->sproc)( ki); 394 if (v->width < i) 395 v->width = i; 396 if (v->width > v->dwidth) 397 v->width = v->dwidth; 398 } 399 } 400 401 static void 402 sizevars() 403 { 404 struct varent *vent; 405 VAR *v; 406 int i; 407 408 for (vent = vhead; vent; vent = vent->next) { 409 v = vent->var; 410 i = strlen(v->header); 411 if (v->width < i) 412 v->width = i; 413 totwidth += v->width + 1; /* +1 for space */ 414 } 415 totwidth--; 416 } 417 418 static char * 419 fmt(fn, ki, comm, maxlen) 420 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 421 KINFO *ki; 422 char *comm; 423 int maxlen; 424 { 425 char *s; 426 427 if ((s = 428 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 429 err(1, NULL); 430 return (s); 431 } 432 433 static void 434 saveuser(ki) 435 KINFO *ki; 436 { 437 struct pstats pstats; 438 struct usave *usp; 439 struct user *u_addr = (struct user *)USRSTACK; 440 441 usp = &ki->ki_u; 442 if (kvm_uread(kd, KI_PROC(ki), (unsigned long)&u_addr->u_stats, 443 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 444 /* 445 * The u-area might be swapped out, and we can't get 446 * at it because we have a crashdump and no swap. 447 * If it's here fill in these fields, otherwise, just 448 * leave them 0. 449 */ 450 usp->u_start = pstats.p_start; 451 usp->u_ru = pstats.p_ru; 452 usp->u_cru = pstats.p_cru; 453 usp->u_valid = 1; 454 } else 455 usp->u_valid = 0; 456 /* 457 * save arguments if needed 458 */ 459 if (needcomm) 460 ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm, 461 MAXCOMLEN); 462 else 463 ki->ki_args = NULL; 464 if (needenv) 465 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 466 else 467 ki->ki_env = NULL; 468 } 469 470 static int 471 pscomp(a, b) 472 const void *a, *b; 473 { 474 int i; 475 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 476 KI_EPROC(k)->e_vm.vm_tsize) 477 478 if (sortby == SORTCPU) 479 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 480 if (sortby == SORTMEM) 481 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 482 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 483 if (i == 0) 484 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 485 return (i); 486 } 487 488 /* 489 * ICK (all for getopt), would rather hide the ugliness 490 * here than taint the main code. 491 * 492 * ps foo -> ps -foo 493 * ps 34 -> ps -p34 494 * 495 * The old convention that 't' with no trailing tty arg means the users 496 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 497 * feature is available with the option 'T', which takes no argument. 498 */ 499 static char * 500 kludge_oldps_options(s) 501 char *s; 502 { 503 size_t len; 504 char *newopts, *ns, *cp; 505 506 len = strlen(s); 507 if ((newopts = ns = malloc(len + 2)) == NULL) 508 err(1, NULL); 509 /* 510 * options begin with '-' 511 */ 512 if (*s != '-') 513 *ns++ = '-'; /* add option flag */ 514 /* 515 * gaze to end of argv[1] 516 */ 517 cp = s + len - 1; 518 /* 519 * if last letter is a 't' flag with no argument (in the context 520 * of the oldps options -- option string NOT starting with a '-' -- 521 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 522 */ 523 if (*cp == 't' && *s != '-') 524 *cp = 'T'; 525 else { 526 /* 527 * otherwise check for trailing number, which *may* be a 528 * pid. 529 */ 530 while (cp >= s && isdigit(*cp)) 531 --cp; 532 } 533 cp++; 534 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 535 ns += cp - s; 536 /* 537 * if there's a trailing number, and not a preceding 'p' (pid) or 538 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 539 */ 540 if (isdigit(*cp) && 541 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 542 (cp - 1 == s || cp[-2] != 't')) 543 *ns++ = 'p'; 544 (void)strcpy(ns, cp); /* and append the number */ 545 546 return (newopts); 547 } 548 549 static void 550 usage() 551 { 552 553 (void)fprintf(stderr, "%s\n%s\n%s\n", 554 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 555 " [-M core] [-N system] [-W swap]", 556 " ps [-L]"); 557 exit(1); 558 } 559