ps.c revision 1.12
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 34 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1990, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/user.h> 46 #include <sys/time.h> 47 #include <sys/resource.h> 48 #include <sys/proc.h> 49 #include <sys/stat.h> 50 #include <sys/ioctl.h> 51 #include <sys/sysctl.h> 52 53 #include <ctype.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <fcntl.h> 57 #include <kvm.h> 58 #include <nlist.h> 59 #include <paths.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 #include "ps.h" 66 67 #ifdef P_PPWAIT 68 #define NEWVM 69 #endif 70 71 KINFO *kinfo; 72 struct varent *vhead, *vtail; 73 74 int eval; /* exit value */ 75 int rawcpu; /* -C */ 76 int sumrusage; /* -S */ 77 int termwidth; /* width of screen (0 == infinity) */ 78 int totwidth; /* calculated width of requested variables */ 79 80 static int needuser, needcomm, needenv, commandonly; 81 82 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 83 84 static char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int), 85 KINFO *, char *, int)); 86 static char *kludge_oldps_options __P((char *)); 87 static int pscomp __P((const void *, const void *)); 88 static void saveuser __P((KINFO *)); 89 static void scanvars __P((void)); 90 static void usage __P((void)); 91 92 char dfmt[] = "pid tt state time command"; 93 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 94 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 95 char o1[] = "pid"; 96 char o2[] = "tt state time command"; 97 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 98 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 99 100 kvm_t *kd; 101 102 int 103 main(argc, argv) 104 int argc; 105 char *argv[]; 106 { 107 struct kinfo_proc *kp; 108 struct varent *vent; 109 struct winsize ws; 110 dev_t ttydev; 111 pid_t pid; 112 uid_t uid; 113 int all, ch, flag, i, fmt, lineno, nentries; 114 int prtheader, wflag, what, xflg; 115 char *nlistf, *memf, *swapf, errbuf[256]; 116 117 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 118 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 119 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 120 ws.ws_col == 0) 121 termwidth = 79; 122 else 123 termwidth = ws.ws_col - 1; 124 125 if (argc > 1) 126 argv[1] = kludge_oldps_options(argv[1]); 127 128 all = fmt = prtheader = wflag = xflg = 0; 129 pid = -1; 130 uid = (uid_t) -1; 131 ttydev = NODEV; 132 memf = nlistf = swapf = NULL; 133 while ((ch = getopt(argc, argv, 134 "acCeghjLlM:mN:O:o:p:rSTt:uvW:wx")) != EOF) 135 switch((char)ch) { 136 case 'a': 137 all = 1; 138 break; 139 case 'c': 140 commandonly = 1; 141 break; 142 case 'e': /* XXX set ufmt */ 143 needenv = 1; 144 break; 145 case 'C': 146 rawcpu = 1; 147 break; 148 case 'g': 149 break; /* no-op */ 150 case 'h': 151 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 152 break; 153 case 'j': 154 parsefmt(jfmt); 155 fmt = 1; 156 jfmt[0] = '\0'; 157 break; 158 case 'L': 159 showkey(); 160 exit(0); 161 case 'l': 162 parsefmt(lfmt); 163 fmt = 1; 164 lfmt[0] = '\0'; 165 break; 166 case 'M': 167 memf = optarg; 168 break; 169 case 'm': 170 sortby = SORTMEM; 171 break; 172 case 'N': 173 nlistf = optarg; 174 break; 175 case 'O': 176 parsefmt(o1); 177 parsefmt(optarg); 178 parsefmt(o2); 179 o1[0] = o2[0] = '\0'; 180 fmt = 1; 181 break; 182 case 'o': 183 parsefmt(optarg); 184 fmt = 1; 185 break; 186 case 'p': 187 pid = atol(optarg); 188 xflg = 1; 189 break; 190 case 'r': 191 sortby = SORTCPU; 192 break; 193 case 'S': 194 sumrusage = 1; 195 break; 196 case 'T': 197 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 198 errx(1, "stdin: not a terminal"); 199 /* FALLTHROUGH */ 200 case 't': { 201 struct stat sb; 202 char *ttypath, pathbuf[MAXPATHLEN]; 203 204 if (strcmp(optarg, "co") == 0) 205 ttypath = _PATH_CONSOLE; 206 else if (*optarg != '/') 207 (void)snprintf(ttypath = pathbuf, 208 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 209 else 210 ttypath = optarg; 211 if (stat(ttypath, &sb) == -1) 212 err(1, "%s", ttypath); 213 if (!S_ISCHR(sb.st_mode)) 214 errx(1, "%s: not a terminal", ttypath); 215 ttydev = sb.st_rdev; 216 break; 217 } 218 case 'u': 219 parsefmt(ufmt); 220 sortby = SORTCPU; 221 fmt = 1; 222 ufmt[0] = '\0'; 223 break; 224 case 'v': 225 parsefmt(vfmt); 226 sortby = SORTMEM; 227 fmt = 1; 228 vfmt[0] = '\0'; 229 break; 230 case 'W': 231 swapf = optarg; 232 break; 233 case 'w': 234 if (wflag) 235 termwidth = UNLIMITED; 236 else if (termwidth < 131) 237 termwidth = 131; 238 wflag++; 239 break; 240 case 'x': 241 xflg = 1; 242 break; 243 case '?': 244 default: 245 usage(); 246 } 247 argc -= optind; 248 argv += optind; 249 250 #define BACKWARD_COMPATIBILITY 251 #ifdef BACKWARD_COMPATIBILITY 252 if (*argv) { 253 nlistf = *argv; 254 if (*++argv) { 255 memf = *argv; 256 if (*++argv) 257 swapf = *argv; 258 } 259 } 260 #endif 261 /* 262 * Discard setgid privileges if not the running kernel so that bad 263 * guys can't print interesting stuff from kernel memory. 264 */ 265 if (nlistf != NULL || memf != NULL || swapf != NULL) 266 setgid(getgid()); 267 268 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 269 if (kd == 0) 270 errx(1, "%s", errbuf); 271 272 if (!fmt) 273 parsefmt(dfmt); 274 275 if (!all && ttydev == NODEV && pid == -1) /* XXX - should be cleaner */ 276 uid = getuid(); 277 278 /* 279 * scan requested variables, noting what structures are needed, 280 * and adjusting header widths as appropiate. 281 */ 282 scanvars(); 283 /* 284 * get proc list 285 */ 286 if (uid != (uid_t) -1) { 287 what = KERN_PROC_UID; 288 flag = uid; 289 } else if (ttydev != NODEV) { 290 what = KERN_PROC_TTY; 291 flag = ttydev; 292 } else if (pid != -1) { 293 what = KERN_PROC_PID; 294 flag = pid; 295 } else { 296 what = KERN_PROC_ALL; 297 flag = 0; 298 } 299 /* 300 * select procs 301 */ 302 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 303 errx(1, "%s", kvm_geterr(kd)); 304 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 305 err(1, NULL); 306 for (i = nentries; --i >= 0; ++kp) { 307 kinfo[i].ki_p = kp; 308 if (needuser) 309 saveuser(&kinfo[i]); 310 } 311 /* 312 * print header 313 */ 314 printheader(); 315 if (nentries == 0) 316 exit(0); 317 /* 318 * sort proc list 319 */ 320 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 321 /* 322 * for each proc, call each variable output function. 323 */ 324 for (i = lineno = 0; i < nentries; i++) { 325 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 326 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 327 continue; 328 for (vent = vhead; vent; vent = vent->next) { 329 (vent->var->oproc)(&kinfo[i], vent); 330 if (vent->next != NULL) 331 (void)putchar(' '); 332 } 333 (void)putchar('\n'); 334 if (prtheader && lineno++ == prtheader - 4) { 335 (void)putchar('\n'); 336 printheader(); 337 lineno = 0; 338 } 339 } 340 exit(eval); 341 } 342 343 static void 344 scanvars() 345 { 346 struct varent *vent; 347 VAR *v; 348 int i; 349 350 for (vent = vhead; vent; vent = vent->next) { 351 v = vent->var; 352 i = strlen(v->header); 353 if (v->width < i) 354 v->width = i; 355 totwidth += v->width + 1; /* +1 for space */ 356 if (v->flag & USER) 357 needuser = 1; 358 if (v->flag & COMM) 359 needcomm = 1; 360 } 361 totwidth--; 362 } 363 364 static char * 365 fmt(fn, ki, comm, maxlen) 366 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 367 KINFO *ki; 368 char *comm; 369 int maxlen; 370 { 371 char *s; 372 373 if ((s = 374 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 375 err(1, NULL); 376 return (s); 377 } 378 379 static void 380 saveuser(ki) 381 KINFO *ki; 382 { 383 struct pstats pstats; 384 struct usave *usp; 385 386 usp = &ki->ki_u; 387 if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats, 388 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 389 /* 390 * The u-area might be swapped out, and we can't get 391 * at it because we have a crashdump and no swap. 392 * If it's here fill in these fields, otherwise, just 393 * leave them 0. 394 */ 395 usp->u_start = pstats.p_start; 396 usp->u_ru = pstats.p_ru; 397 usp->u_cru = pstats.p_cru; 398 usp->u_valid = 1; 399 } else 400 usp->u_valid = 0; 401 /* 402 * save arguments if needed 403 */ 404 if (needcomm) { 405 if (commandonly) 406 ki->ki_args = strdup(KI_PROC(ki)->p_comm); 407 else 408 ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm, 409 MAXCOMLEN); 410 } else 411 ki->ki_args = NULL; 412 if (needenv) 413 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 414 else 415 ki->ki_env = NULL; 416 } 417 418 static int 419 pscomp(a, b) 420 const void *a, *b; 421 { 422 int i; 423 #ifdef NEWVM 424 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 425 KI_EPROC(k)->e_vm.vm_tsize) 426 #else 427 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 428 #endif 429 430 if (sortby == SORTCPU) 431 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 432 if (sortby == SORTMEM) 433 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 434 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 435 if (i == 0) 436 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 437 return (i); 438 } 439 440 /* 441 * ICK (all for getopt), would rather hide the ugliness 442 * here than taint the main code. 443 * 444 * ps foo -> ps -foo 445 * ps 34 -> ps -p34 446 * 447 * The old convention that 't' with no trailing tty arg means the users 448 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 449 * feature is available with the option 'T', which takes no argument. 450 */ 451 static char * 452 kludge_oldps_options(s) 453 char *s; 454 { 455 size_t len; 456 char *newopts, *ns, *cp; 457 458 len = strlen(s); 459 if ((newopts = ns = malloc(len + 2)) == NULL) 460 err(1, NULL); 461 /* 462 * options begin with '-' 463 */ 464 if (*s != '-') 465 *ns++ = '-'; /* add option flag */ 466 /* 467 * gaze to end of argv[1] 468 */ 469 cp = s + len - 1; 470 /* 471 * if last letter is a 't' flag with no argument (in the context 472 * of the oldps options -- option string NOT starting with a '-' -- 473 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 474 */ 475 if (*cp == 't' && *s != '-') 476 *cp = 'T'; 477 else { 478 /* 479 * otherwise check for trailing number, which *may* be a 480 * pid. 481 */ 482 while (cp >= s && isdigit(*cp)) 483 --cp; 484 } 485 cp++; 486 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 487 ns += cp - s; 488 /* 489 * if there's a trailing number, and not a preceding 'p' (pid) or 490 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 491 */ 492 if (isdigit(*cp) && (cp == s || cp[-1] != 't' && cp[-1] != 'p' && 493 (cp - 1 == s || cp[-2] != 't'))) 494 *ns++ = 'p'; 495 (void)strcpy(ns, cp); /* and append the number */ 496 497 return (newopts); 498 } 499 500 static void 501 usage() 502 { 503 504 (void)fprintf(stderr, 505 "usage:\t%s\n\t %s\n\t%s\n", 506 "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]", 507 "[-M core] [-N system] [-W swap]", 508 "ps [-L]"); 509 exit(1); 510 } 511
Indexes created Thu Sep 25 02:09:54 GMT 2025