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 1.17 1997/02/22 14:05:08 peter 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 usage __P((void)); 96 97 char dfmt[] = "pid tt state time command"; 98 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 99 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 100 char o1[] = "pid"; 101 char o2[] = "tt state time command"; 102 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 103 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 104 105 kvm_t *kd; 106 107 int 108 main(argc, argv) 109 int argc; 110 char *argv[]; 111 { 112 struct kinfo_proc *kp; 113 struct varent *vent; 114 struct winsize ws; 115 struct passwd *pwd; 116 dev_t ttydev; 117 pid_t pid; 118 uid_t uid; 119 int all, ch, flag, i, fmt, lineno, nentries; 120 int prtheader, wflag, what, xflg; 121 char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX]; 122 123 (void) setlocale(LC_ALL, ""); 124 125 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 126 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 127 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 128 ws.ws_col == 0) 129 termwidth = 79; 130 else 131 termwidth = ws.ws_col - 1; 132 133 if (argc > 1) 134 argv[1] = kludge_oldps_options(argv[1]); 135 136 all = fmt = prtheader = wflag = xflg = 0; 137 pid = -1; 138 uid = (uid_t) -1; 139 ttydev = NODEV; 140 memf = nlistf = swapf = NULL; 141 while ((ch = getopt(argc, argv, 142 "aCceghjLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1) 143 switch((char)ch) { 144 case 'a': 145 all = 1; 146 break; 147 case 'C': 148 rawcpu = 1; 149 break; 150 case 'c': 151 cflag = 1; 152 break; 153 case 'e': /* XXX set ufmt */ 154 needenv = 1; 155 break; 156 case 'g': 157 break; /* no-op */ 158 case 'h': 159 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 160 break; 161 case 'j': 162 parsefmt(jfmt); 163 fmt = 1; 164 jfmt[0] = '\0'; 165 break; 166 case 'L': 167 showkey(); 168 exit(0); 169 case 'l': 170 parsefmt(lfmt); 171 fmt = 1; 172 lfmt[0] = '\0'; 173 break; 174 case 'M': 175 memf = optarg; 176 break; 177 case 'm': 178 sortby = SORTMEM; 179 break; 180 case 'N': 181 nlistf = optarg; 182 break; 183 case 'O': 184 parsefmt(o1); 185 parsefmt(optarg); 186 parsefmt(o2); 187 o1[0] = o2[0] = '\0'; 188 fmt = 1; 189 break; 190 case 'o': 191 parsefmt(optarg); 192 fmt = 1; 193 break; 194 case 'p': 195 pid = atol(optarg); 196 xflg = 1; 197 break; 198 case 'r': 199 sortby = SORTCPU; 200 break; 201 case 'S': 202 sumrusage = 1; 203 break; 204 case 'T': 205 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 206 errx(1, "stdin: not a terminal"); 207 /* FALLTHROUGH */ 208 case 't': { 209 struct stat sb; 210 char *ttypath, pathbuf[MAXPATHLEN]; 211 212 if (strcmp(optarg, "co") == 0) 213 ttypath = _PATH_CONSOLE; 214 else if (*optarg != '/') 215 (void)snprintf(ttypath = pathbuf, 216 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 217 else 218 ttypath = optarg; 219 if (stat(ttypath, &sb) == -1) 220 err(1, "%s", ttypath); 221 if (!S_ISCHR(sb.st_mode)) 222 errx(1, "%s: not a terminal", ttypath); 223 ttydev = sb.st_rdev; 224 break; 225 } 226 case 'U': 227 pwd = getpwnam(optarg); 228 if (pwd == NULL) 229 errx(1, "%s: no such user", optarg); 230 uid = pwd->pw_uid; 231 endpwent(); 232 xflg++; /* XXX: intuitive? */ 233 break; 234 case 'u': 235 parsefmt(ufmt); 236 sortby = SORTCPU; 237 fmt = 1; 238 ufmt[0] = '\0'; 239 break; 240 case 'v': 241 parsefmt(vfmt); 242 sortby = SORTMEM; 243 fmt = 1; 244 vfmt[0] = '\0'; 245 break; 246 case 'W': 247 swapf = optarg; 248 break; 249 case 'w': 250 if (wflag) 251 termwidth = UNLIMITED; 252 else if (termwidth < 131) 253 termwidth = 131; 254 wflag++; 255 break; 256 case 'x': 257 xflg = 1; 258 break; 259 case '?': 260 default: 261 usage(); 262 } 263 argc -= optind; 264 argv += optind; 265 266 #define BACKWARD_COMPATIBILITY 267 #ifdef BACKWARD_COMPATIBILITY 268 if (*argv) { 269 nlistf = *argv; 270 if (*++argv) { 271 memf = *argv; 272 if (*++argv) 273 swapf = *argv; 274 } 275 } 276 #endif 277 /* 278 * Discard setgid privileges if not the running kernel so that bad 279 * guys can't print interesting stuff from kernel memory. 280 */ 281 if (nlistf != NULL || memf != NULL || swapf != NULL) 282 setgid(getgid()); 283 284 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 285 if (kd == 0) 286 errx(1, "%s", errbuf); 287 288 if (!fmt) 289 parsefmt(dfmt); 290 291 /* XXX - should be cleaner */ 292 if (!all && ttydev == NODEV && pid == -1 && uid == (uid_t)-1) 293 uid = getuid(); 294 295 /* 296 * scan requested variables, noting what structures are needed, 297 * and adjusting header widths as appropiate. 298 */ 299 scanvars(); 300 /* 301 * get proc list 302 */ 303 if (uid != (uid_t) -1) { 304 what = KERN_PROC_UID; 305 flag = uid; 306 } else if (ttydev != NODEV) { 307 what = KERN_PROC_TTY; 308 flag = ttydev; 309 } else if (pid != -1) { 310 what = KERN_PROC_PID; 311 flag = pid; 312 } else { 313 what = KERN_PROC_ALL; 314 flag = 0; 315 } 316 /* 317 * select procs 318 */ 319 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 320 errx(1, "%s", kvm_geterr(kd)); 321 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 322 err(1, NULL); 323 for (i = nentries; --i >= 0; ++kp) { 324 kinfo[i].ki_p = kp; 325 if (needuser) 326 saveuser(&kinfo[i]); 327 } 328 /* 329 * print header 330 */ 331 printheader(); 332 if (nentries == 0) 333 exit(0); 334 /* 335 * sort proc list 336 */ 337 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 338 /* 339 * for each proc, call each variable output function. 340 */ 341 for (i = lineno = 0; i < nentries; i++) { 342 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 343 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 344 continue; 345 for (vent = vhead; vent; vent = vent->next) { 346 (vent->var->oproc)(&kinfo[i], vent); 347 if (vent->next != NULL) 348 (void)putchar(' '); 349 } 350 (void)putchar('\n'); 351 if (prtheader && lineno++ == prtheader - 4) { 352 (void)putchar('\n'); 353 printheader(); 354 lineno = 0; 355 } 356 } 357 exit(eval); 358 } 359 360 static void 361 scanvars() 362 { 363 struct varent *vent; 364 VAR *v; 365 int i; 366 367 for (vent = vhead; vent; vent = vent->next) { 368 v = vent->var; 369 i = strlen(v->header); 370 if (v->width < i) 371 v->width = i; 372 totwidth += v->width + 1; /* +1 for space */ 373 if (v->flag & USER) 374 needuser = 1; 375 if (v->flag & COMM) 376 needcomm = 1; 377 } 378 totwidth--; 379 } 380 381 static char * 382 fmt(fn, ki, comm, maxlen) 383 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 384 KINFO *ki; 385 char *comm; 386 int maxlen; 387 { 388 char *s; 389 390 if ((s = 391 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 392 err(1, NULL); 393 return (s); 394 } 395 396 static void 397 saveuser(ki) 398 KINFO *ki; 399 { 400 struct pstats pstats; 401 struct usave *usp; 402 struct user *u_addr = (struct user *)USRSTACK; 403 404 usp = &ki->ki_u; 405 if (kvm_uread(kd, KI_PROC(ki), (unsigned long)&u_addr->u_stats, 406 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 407 /* 408 * The u-area might be swapped out, and we can't get 409 * at it because we have a crashdump and no swap. 410 * If it's here fill in these fields, otherwise, just 411 * leave them 0. 412 */ 413 usp->u_start = pstats.p_start; 414 usp->u_ru = pstats.p_ru; 415 usp->u_cru = pstats.p_cru; 416 usp->u_valid = 1; 417 } else 418 usp->u_valid = 0; 419 /* 420 * save arguments if needed 421 */ 422 if (needcomm) 423 ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm, 424 MAXCOMLEN); 425 else 426 ki->ki_args = NULL; 427 if (needenv) 428 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 429 else 430 ki->ki_env = NULL; 431 } 432 433 static int 434 pscomp(a, b) 435 const void *a, *b; 436 { 437 int i; 438 #ifdef NEWVM 439 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 440 KI_EPROC(k)->e_vm.vm_tsize) 441 #else 442 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 443 #endif 444 445 if (sortby == SORTCPU) 446 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 447 if (sortby == SORTMEM) 448 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 449 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 450 if (i == 0) 451 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 452 return (i); 453 } 454 455 /* 456 * ICK (all for getopt), would rather hide the ugliness 457 * here than taint the main code. 458 * 459 * ps foo -> ps -foo 460 * ps 34 -> ps -p34 461 * 462 * The old convention that 't' with no trailing tty arg means the users 463 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 464 * feature is available with the option 'T', which takes no argument. 465 */ 466 static char * 467 kludge_oldps_options(s) 468 char *s; 469 { 470 size_t len; 471 char *newopts, *ns, *cp; 472 473 len = strlen(s); 474 if ((newopts = ns = malloc(len + 2)) == NULL) 475 err(1, NULL); 476 /* 477 * options begin with '-' 478 */ 479 if (*s != '-') 480 *ns++ = '-'; /* add option flag */ 481 /* 482 * gaze to end of argv[1] 483 */ 484 cp = s + len - 1; 485 /* 486 * if last letter is a 't' flag with no argument (in the context 487 * of the oldps options -- option string NOT starting with a '-' -- 488 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 489 */ 490 if (*cp == 't' && *s != '-') 491 *cp = 'T'; 492 else { 493 /* 494 * otherwise check for trailing number, which *may* be a 495 * pid. 496 */ 497 while (cp >= s && isdigit(*cp)) 498 --cp; 499 } 500 cp++; 501 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 502 ns += cp - s; 503 /* 504 * if there's a trailing number, and not a preceding 'p' (pid) or 505 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 506 */ 507 if (isdigit(*cp) && 508 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 509 (cp - 1 == s || cp[-2] != 't')) 510 *ns++ = 'p'; 511 (void)strcpy(ns, cp); /* and append the number */ 512 513 return (newopts); 514 } 515 516 static void 517 usage() 518 { 519 520 (void)fprintf(stderr, 521 "usage:\t%s\n\t %s\n\t%s\n", 522 "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 523 "[-M core] [-N system] [-W swap]", 524 "ps [-L]"); 525 exit(1); 526 } 527