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 1.12 1996/01/20 10:43:54 mpp 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 cflag; /* -c */ 81 int rawcpu; /* -C */ 82 int sumrusage; /* -S */ 83 int termwidth; /* width of screen (0 == infinity) */ 84 int totwidth; /* calculated width of requested variables */ 85 86 static int needuser, needcomm, needenv; 87 88 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 89 90 static char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int), 91 KINFO *, char *, int)); 92 static char *kludge_oldps_options __P((char *)); 93 static int pscomp __P((const void *, const void *)); 94 static void saveuser __P((KINFO *)); 95 static void scanvars __P((void)); 96 static void usage __P((void)); 97 98 char dfmt[] = "pid tt state time command"; 99 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 100 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 101 char o1[] = "pid"; 102 char o2[] = "tt state time command"; 103 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 104 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 105 106 kvm_t *kd; 107 108 int 109 main(argc, argv) 110 int argc; 111 char *argv[]; 112 { 113 struct kinfo_proc *kp; 114 struct varent *vent; 115 struct winsize ws; 116 struct passwd *pwd; 117 dev_t ttydev; 118 pid_t pid; 119 uid_t uid; 120 int all, ch, flag, i, fmt, lineno, nentries; 121 int prtheader, wflag, what, xflg; 122 char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX]; 123 124 (void) setlocale(LC_ALL, ""); 125 126 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 127 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 128 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 129 ws.ws_col == 0) 130 termwidth = 79; 131 else 132 termwidth = ws.ws_col - 1; 133 134 if (argc > 1) 135 argv[1] = kludge_oldps_options(argv[1]); 136 137 all = fmt = prtheader = wflag = xflg = 0; 138 pid = -1; 139 uid = (uid_t) -1; 140 ttydev = NODEV; 141 memf = nlistf = swapf = NULL; 142 while ((ch = getopt(argc, argv, 143 "aCceghjLlM:mN:O:o:p:rSTt:U:uvW:wx")) != EOF) 144 switch((char)ch) { 145 case 'a': 146 all = 1; 147 break; 148 case 'C': 149 rawcpu = 1; 150 break; 151 case 'c': 152 cflag = 1; 153 break; 154 case 'e': /* XXX set ufmt */ 155 needenv = 1; 156 break; 157 case 'g': 158 break; /* no-op */ 159 case 'h': 160 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 161 break; 162 case 'j': 163 parsefmt(jfmt); 164 fmt = 1; 165 jfmt[0] = '\0'; 166 break; 167 case 'L': 168 showkey(); 169 exit(0); 170 case 'l': 171 parsefmt(lfmt); 172 fmt = 1; 173 lfmt[0] = '\0'; 174 break; 175 case 'M': 176 memf = optarg; 177 break; 178 case 'm': 179 sortby = SORTMEM; 180 break; 181 case 'N': 182 nlistf = optarg; 183 break; 184 case 'O': 185 parsefmt(o1); 186 parsefmt(optarg); 187 parsefmt(o2); 188 o1[0] = o2[0] = '\0'; 189 fmt = 1; 190 break; 191 case 'o': 192 parsefmt(optarg); 193 fmt = 1; 194 break; 195 case 'p': 196 pid = atol(optarg); 197 xflg = 1; 198 break; 199 case 'r': 200 sortby = SORTCPU; 201 break; 202 case 'S': 203 sumrusage = 1; 204 break; 205 case 'T': 206 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 207 errx(1, "stdin: not a terminal"); 208 /* FALLTHROUGH */ 209 case 't': { 210 struct stat sb; 211 char *ttypath, pathbuf[MAXPATHLEN]; 212 213 if (strcmp(optarg, "co") == 0) 214 ttypath = _PATH_CONSOLE; 215 else if (*optarg != '/') 216 (void)snprintf(ttypath = pathbuf, 217 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 218 else 219 ttypath = optarg; 220 if (stat(ttypath, &sb) == -1) 221 err(1, "%s", ttypath); 222 if (!S_ISCHR(sb.st_mode)) 223 errx(1, "%s: not a terminal", ttypath); 224 ttydev = sb.st_rdev; 225 break; 226 } 227 case 'U': 228 pwd = getpwnam(optarg); 229 if (pwd == NULL) 230 errx(1, "%s: no such user", optarg); 231 uid = pwd->pw_uid; 232 endpwent(); 233 xflg++; /* XXX: intuitive? */ 234 break; 235 case 'u': 236 parsefmt(ufmt); 237 sortby = SORTCPU; 238 fmt = 1; 239 ufmt[0] = '\0'; 240 break; 241 case 'v': 242 parsefmt(vfmt); 243 sortby = SORTMEM; 244 fmt = 1; 245 vfmt[0] = '\0'; 246 break; 247 case 'W': 248 swapf = optarg; 249 break; 250 case 'w': 251 if (wflag) 252 termwidth = UNLIMITED; 253 else if (termwidth < 131) 254 termwidth = 131; 255 wflag++; 256 break; 257 case 'x': 258 xflg = 1; 259 break; 260 case '?': 261 default: 262 usage(); 263 } 264 argc -= optind; 265 argv += optind; 266 267 #define BACKWARD_COMPATIBILITY 268 #ifdef BACKWARD_COMPATIBILITY 269 if (*argv) { 270 nlistf = *argv; 271 if (*++argv) { 272 memf = *argv; 273 if (*++argv) 274 swapf = *argv; 275 } 276 } 277 #endif 278 /* 279 * Discard setgid privileges if not the running kernel so that bad 280 * guys can't print interesting stuff from kernel memory. 281 */ 282 if (nlistf != NULL || memf != NULL || swapf != NULL) 283 setgid(getgid()); 284 285 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 286 if (kd == 0) 287 errx(1, "%s", errbuf); 288 289 if (!fmt) 290 parsefmt(dfmt); 291 292 /* XXX - should be cleaner */ 293 if (!all && ttydev == NODEV && pid == -1 && uid == (uid_t)-1) 294 uid = getuid(); 295 296 /* 297 * scan requested variables, noting what structures are needed, 298 * and adjusting header widths as appropiate. 299 */ 300 scanvars(); 301 /* 302 * get proc list 303 */ 304 if (uid != (uid_t) -1) { 305 what = KERN_PROC_UID; 306 flag = uid; 307 } else if (ttydev != NODEV) { 308 what = KERN_PROC_TTY; 309 flag = ttydev; 310 } else if (pid != -1) { 311 what = KERN_PROC_PID; 312 flag = pid; 313 } else { 314 what = KERN_PROC_ALL; 315 flag = 0; 316 } 317 /* 318 * select procs 319 */ 320 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 321 errx(1, "%s", kvm_geterr(kd)); 322 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 323 err(1, NULL); 324 for (i = nentries; --i >= 0; ++kp) { 325 kinfo[i].ki_p = kp; 326 if (needuser) 327 saveuser(&kinfo[i]); 328 } 329 /* 330 * print header 331 */ 332 printheader(); 333 if (nentries == 0) 334 exit(0); 335 /* 336 * sort proc list 337 */ 338 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 339 /* 340 * for each proc, call each variable output function. 341 */ 342 for (i = lineno = 0; i < nentries; i++) { 343 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 344 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 345 continue; 346 for (vent = vhead; vent; vent = vent->next) { 347 (vent->var->oproc)(&kinfo[i], vent); 348 if (vent->next != NULL) 349 (void)putchar(' '); 350 } 351 (void)putchar('\n'); 352 if (prtheader && lineno++ == prtheader - 4) { 353 (void)putchar('\n'); 354 printheader(); 355 lineno = 0; 356 } 357 } 358 exit(eval); 359 } 360 361 static void 362 scanvars() 363 { 364 struct varent *vent; 365 VAR *v; 366 int i; 367 368 for (vent = vhead; vent; vent = vent->next) { 369 v = vent->var; 370 i = strlen(v->header); 371 if (v->width < i) 372 v->width = i; 373 totwidth += v->width + 1; /* +1 for space */ 374 if (v->flag & USER) 375 needuser = 1; 376 if (v->flag & COMM) 377 needcomm = 1; 378 } 379 totwidth--; 380 } 381 382 static char * 383 fmt(fn, ki, comm, maxlen) 384 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 385 KINFO *ki; 386 char *comm; 387 int maxlen; 388 { 389 char *s; 390 391 if ((s = 392 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 393 err(1, NULL); 394 return (s); 395 } 396 397 static void 398 saveuser(ki) 399 KINFO *ki; 400 { 401 struct pstats pstats; 402 struct usave *usp; 403 struct user *u_addr = (struct user *)USRSTACK; 404 405 usp = &ki->ki_u; 406 if (kvm_uread(kd, KI_PROC(ki), (unsigned long)&u_addr->u_stats, 407 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 408 /* 409 * The u-area might be swapped out, and we can't get 410 * at it because we have a crashdump and no swap. 411 * If it's here fill in these fields, otherwise, just 412 * leave them 0. 413 */ 414 usp->u_start = pstats.p_start; 415 usp->u_ru = pstats.p_ru; 416 usp->u_cru = pstats.p_cru; 417 usp->u_valid = 1; 418 } else 419 usp->u_valid = 0; 420 /* 421 * save arguments if needed 422 */ 423 if (needcomm) 424 ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm, 425 MAXCOMLEN); 426 else 427 ki->ki_args = NULL; 428 if (needenv) 429 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 430 else 431 ki->ki_env = NULL; 432 } 433 434 static int 435 pscomp(a, b) 436 const void *a, *b; 437 { 438 int i; 439 #ifdef NEWVM 440 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 441 KI_EPROC(k)->e_vm.vm_tsize) 442 #else 443 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 444 #endif 445 446 if (sortby == SORTCPU) 447 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 448 if (sortby == SORTMEM) 449 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 450 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 451 if (i == 0) 452 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 453 return (i); 454 } 455 456 /* 457 * ICK (all for getopt), would rather hide the ugliness 458 * here than taint the main code. 459 * 460 * ps foo -> ps -foo 461 * ps 34 -> ps -p34 462 * 463 * The old convention that 't' with no trailing tty arg means the users 464 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 465 * feature is available with the option 'T', which takes no argument. 466 */ 467 static char * 468 kludge_oldps_options(s) 469 char *s; 470 { 471 size_t len; 472 char *newopts, *ns, *cp; 473 474 len = strlen(s); 475 if ((newopts = ns = malloc(len + 2)) == NULL) 476 err(1, NULL); 477 /* 478 * options begin with '-' 479 */ 480 if (*s != '-') 481 *ns++ = '-'; /* add option flag */ 482 /* 483 * gaze to end of argv[1] 484 */ 485 cp = s + len - 1; 486 /* 487 * if last letter is a 't' flag with no argument (in the context 488 * of the oldps options -- option string NOT starting with a '-' -- 489 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 490 */ 491 if (*cp == 't' && *s != '-') 492 *cp = 'T'; 493 else { 494 /* 495 * otherwise check for trailing number, which *may* be a 496 * pid. 497 */ 498 while (cp >= s && isdigit(*cp)) 499 --cp; 500 } 501 cp++; 502 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 503 ns += cp - s; 504 /* 505 * if there's a trailing number, and not a preceding 'p' (pid) or 506 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 507 */ 508 if (isdigit(*cp) && 509 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 510 (cp - 1 == s || cp[-2] != 't')) 511 *ns++ = 'p'; 512 (void)strcpy(ns, cp); /* and append the number */ 513 514 return (newopts); 515 } 516 517 static void 518 usage() 519 { 520 521 (void)fprintf(stderr, 522 "usage:\t%s\n\t %s\n\t%s\n", 523 "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 524 "[-M core] [-N system] [-W swap]", 525 "ps [-L]"); 526 exit(1); 527 } 528