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 1.11 1996/01/12 08:49:43 peter Exp $ 34 */ 35 36 #ifndef lint 37 static char 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 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/proc.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 <errno.h> 58 #include <fcntl.h> 59 #include <kvm.h> 60 #include <limits.h> 61 #include <nlist.h> 62 #include <paths.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 #include <locale.h> 68 #include <pwd.h> 69 70 #include "ps.h" 71 72 #ifdef P_PPWAIT 73 #define NEWVM 74 #endif 75 76 KINFO *kinfo; 77 struct varent *vhead, *vtail; 78 79 int eval; /* exit value */ 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 "aCeghjLlM:mN:O:o:p:rSTt:U:uvW:wx")) != EOF) 143 switch((char)ch) { 144 case 'a': 145 all = 1; 146 break; 147 case 'e': /* XXX set ufmt */ 148 needenv = 1; 149 break; 150 case 'C': 151 rawcpu = 1; 152 break; 153 case 'g': 154 break; /* no-op */ 155 case 'h': 156 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 157 break; 158 case 'j': 159 parsefmt(jfmt); 160 fmt = 1; 161 jfmt[0] = '\0'; 162 break; 163 case 'L': 164 showkey(); 165 exit(0); 166 case 'l': 167 parsefmt(lfmt); 168 fmt = 1; 169 lfmt[0] = '\0'; 170 break; 171 case 'M': 172 memf = optarg; 173 break; 174 case 'm': 175 sortby = SORTMEM; 176 break; 177 case 'N': 178 nlistf = optarg; 179 break; 180 case 'O': 181 parsefmt(o1); 182 parsefmt(optarg); 183 parsefmt(o2); 184 o1[0] = o2[0] = '\0'; 185 fmt = 1; 186 break; 187 case 'o': 188 parsefmt(optarg); 189 fmt = 1; 190 break; 191 case 'p': 192 pid = atol(optarg); 193 xflg = 1; 194 break; 195 case 'r': 196 sortby = SORTCPU; 197 break; 198 case 'S': 199 sumrusage = 1; 200 break; 201 case 'T': 202 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 203 errx(1, "stdin: not a terminal"); 204 /* FALLTHROUGH */ 205 case 't': { 206 struct stat sb; 207 char *ttypath, pathbuf[MAXPATHLEN]; 208 209 if (strcmp(optarg, "co") == 0) 210 ttypath = _PATH_CONSOLE; 211 else if (*optarg != '/') 212 (void)snprintf(ttypath = pathbuf, 213 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 214 else 215 ttypath = optarg; 216 if (stat(ttypath, &sb) == -1) 217 err(1, "%s", ttypath); 218 if (!S_ISCHR(sb.st_mode)) 219 errx(1, "%s: not a terminal", ttypath); 220 ttydev = sb.st_rdev; 221 break; 222 } 223 case 'U': 224 pwd = getpwnam(optarg); 225 if (pwd == NULL) 226 errx(1, "%s: no such user", optarg); 227 uid = pwd->pw_uid; 228 endpwent(); 229 xflg++; /* XXX: intuitive? */ 230 break; 231 case 'u': 232 parsefmt(ufmt); 233 sortby = SORTCPU; 234 fmt = 1; 235 ufmt[0] = '\0'; 236 break; 237 case 'v': 238 parsefmt(vfmt); 239 sortby = SORTMEM; 240 fmt = 1; 241 vfmt[0] = '\0'; 242 break; 243 case 'W': 244 swapf = optarg; 245 break; 246 case 'w': 247 if (wflag) 248 termwidth = UNLIMITED; 249 else if (termwidth < 131) 250 termwidth = 131; 251 wflag++; 252 break; 253 case 'x': 254 xflg = 1; 255 break; 256 case '?': 257 default: 258 usage(); 259 } 260 argc -= optind; 261 argv += optind; 262 263 #define BACKWARD_COMPATIBILITY 264 #ifdef BACKWARD_COMPATIBILITY 265 if (*argv) { 266 nlistf = *argv; 267 if (*++argv) { 268 memf = *argv; 269 if (*++argv) 270 swapf = *argv; 271 } 272 } 273 #endif 274 /* 275 * Discard setgid privileges if not the running kernel so that bad 276 * guys can't print interesting stuff from kernel memory. 277 */ 278 if (nlistf != NULL || memf != NULL || swapf != NULL) 279 setgid(getgid()); 280 281 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 282 if (kd == 0) 283 errx(1, "%s", errbuf); 284 285 if (!fmt) 286 parsefmt(dfmt); 287 288 /* XXX - should be cleaner */ 289 if (!all && ttydev == NODEV && pid == -1 && uid == (uid_t)-1) 290 uid = getuid(); 291 292 /* 293 * scan requested variables, noting what structures are needed, 294 * and adjusting header widths as appropiate. 295 */ 296 scanvars(); 297 /* 298 * get proc list 299 */ 300 if (uid != (uid_t) -1) { 301 what = KERN_PROC_UID; 302 flag = uid; 303 } else if (ttydev != NODEV) { 304 what = KERN_PROC_TTY; 305 flag = ttydev; 306 } else if (pid != -1) { 307 what = KERN_PROC_PID; 308 flag = pid; 309 } else { 310 what = KERN_PROC_ALL; 311 flag = 0; 312 } 313 /* 314 * select procs 315 */ 316 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 317 errx(1, "%s", kvm_geterr(kd)); 318 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 319 err(1, NULL); 320 for (i = nentries; --i >= 0; ++kp) { 321 kinfo[i].ki_p = kp; 322 if (needuser) 323 saveuser(&kinfo[i]); 324 } 325 /* 326 * print header 327 */ 328 printheader(); 329 if (nentries == 0) 330 exit(0); 331 /* 332 * sort proc list 333 */ 334 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 335 /* 336 * for each proc, call each variable output function. 337 */ 338 for (i = lineno = 0; i < nentries; i++) { 339 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 340 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 341 continue; 342 for (vent = vhead; vent; vent = vent->next) { 343 (vent->var->oproc)(&kinfo[i], vent); 344 if (vent->next != NULL) 345 (void)putchar(' '); 346 } 347 (void)putchar('\n'); 348 if (prtheader && lineno++ == prtheader - 4) { 349 (void)putchar('\n'); 350 printheader(); 351 lineno = 0; 352 } 353 } 354 exit(eval); 355 } 356 357 static void 358 scanvars() 359 { 360 struct varent *vent; 361 VAR *v; 362 int i; 363 364 for (vent = vhead; vent; vent = vent->next) { 365 v = vent->var; 366 i = strlen(v->header); 367 if (v->width < i) 368 v->width = i; 369 totwidth += v->width + 1; /* +1 for space */ 370 if (v->flag & USER) 371 needuser = 1; 372 if (v->flag & COMM) 373 needcomm = 1; 374 } 375 totwidth--; 376 } 377 378 static char * 379 fmt(fn, ki, comm, maxlen) 380 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 381 KINFO *ki; 382 char *comm; 383 int maxlen; 384 { 385 char *s; 386 387 if ((s = 388 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 389 err(1, NULL); 390 return (s); 391 } 392 393 static void 394 saveuser(ki) 395 KINFO *ki; 396 { 397 struct pstats pstats; 398 struct usave *usp; 399 struct user *u_addr = (struct user *)USRSTACK; 400 401 usp = &ki->ki_u; 402 if (kvm_uread(kd, KI_PROC(ki), (unsigned long)&u_addr->u_stats, 403 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 404 /* 405 * The u-area might be swapped out, and we can't get 406 * at it because we have a crashdump and no swap. 407 * If it's here fill in these fields, otherwise, just 408 * leave them 0. 409 */ 410 usp->u_start = pstats.p_start; 411 usp->u_ru = pstats.p_ru; 412 usp->u_cru = pstats.p_cru; 413 usp->u_valid = 1; 414 } else 415 usp->u_valid = 0; 416 /* 417 * save arguments if needed 418 */ 419 if (needcomm) 420 ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm, 421 MAXCOMLEN); 422 else 423 ki->ki_args = NULL; 424 if (needenv) 425 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 426 else 427 ki->ki_env = NULL; 428 } 429 430 static int 431 pscomp(a, b) 432 const void *a, *b; 433 { 434 int i; 435 #ifdef NEWVM 436 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 437 KI_EPROC(k)->e_vm.vm_tsize) 438 #else 439 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 440 #endif 441 442 if (sortby == SORTCPU) 443 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 444 if (sortby == SORTMEM) 445 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 446 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 447 if (i == 0) 448 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 449 return (i); 450 } 451 452 /* 453 * ICK (all for getopt), would rather hide the ugliness 454 * here than taint the main code. 455 * 456 * ps foo -> ps -foo 457 * ps 34 -> ps -p34 458 * 459 * The old convention that 't' with no trailing tty arg means the users 460 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 461 * feature is available with the option 'T', which takes no argument. 462 */ 463 static char * 464 kludge_oldps_options(s) 465 char *s; 466 { 467 size_t len; 468 char *newopts, *ns, *cp; 469 470 len = strlen(s); 471 if ((newopts = ns = malloc(len + 2)) == NULL) 472 err(1, NULL); 473 /* 474 * options begin with '-' 475 */ 476 if (*s != '-') 477 *ns++ = '-'; /* add option flag */ 478 /* 479 * gaze to end of argv[1] 480 */ 481 cp = s + len - 1; 482 /* 483 * if last letter is a 't' flag with no argument (in the context 484 * of the oldps options -- option string NOT starting with a '-' -- 485 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 486 */ 487 if (*cp == 't' && *s != '-') 488 *cp = 'T'; 489 else { 490 /* 491 * otherwise check for trailing number, which *may* be a 492 * pid. 493 */ 494 while (cp >= s && isdigit(*cp)) 495 --cp; 496 } 497 cp++; 498 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 499 ns += cp - s; 500 /* 501 * if there's a trailing number, and not a preceding 'p' (pid) or 502 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 503 */ 504 if (isdigit(*cp) && 505 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 506 (cp - 1 == s || cp[-2] != 't')) 507 *ns++ = 'p'; 508 (void)strcpy(ns, cp); /* and append the number */ 509 510 return (newopts); 511 } 512 513 static void 514 usage() 515 { 516 517 (void)fprintf(stderr, 518 "usage:\t%s\n\t %s\n\t%s\n", 519 "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 520 "[-M core] [-N system] [-W swap]", 521 "ps [-L]"); 522 exit(1); 523 } 524