ps.c revision 1.14
1 /* $NetBSD: ps.c,v 1.14 1995/05/18 14:37:03 mycroft Exp $ */ 2 3 /*- 4 * Copyright (c) 1990, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 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 #if 0 44 static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 45 #else 46 static char rcsid[] = "$NetBSD: ps.c,v 1.14 1995/05/18 14:37:03 mycroft Exp $"; 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/user.h> 52 #include <sys/time.h> 53 #include <sys/resource.h> 54 #include <sys/proc.h> 55 #include <sys/stat.h> 56 #include <sys/ioctl.h> 57 #include <sys/sysctl.h> 58 59 #include <ctype.h> 60 #include <err.h> 61 #include <errno.h> 62 #include <fcntl.h> 63 #include <kvm.h> 64 #include <nlist.h> 65 #include <paths.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <unistd.h> 70 71 #include "ps.h" 72 73 #ifdef P_PPWAIT 74 #define NEWVM 75 #endif 76 77 KINFO *kinfo; 78 struct varent *vhead, *vtail; 79 80 int eval; /* exit value */ 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, commandonly; 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 dev_t ttydev; 117 pid_t pid; 118 uid_t uid; 119 int all, ch, flag, i, ofmt, lineno, nentries; 120 int prtheader, wflag, what, xflg; 121 char *nlistf, *memf, *swapf, errbuf[256]; 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 = ofmt = 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:uvW:wx")) != EOF) 141 switch((char)ch) { 142 case 'a': 143 all = 1; 144 break; 145 case 'c': 146 commandonly = 1; 147 break; 148 case 'e': /* XXX set ufmt */ 149 needenv = 1; 150 break; 151 case 'C': 152 rawcpu = 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 ofmt = 1; 162 jfmt[0] = '\0'; 163 break; 164 case 'L': 165 showkey(); 166 exit(0); 167 case 'l': 168 parsefmt(lfmt); 169 ofmt = 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 ofmt = 1; 187 break; 188 case 'o': 189 parsefmt(optarg); 190 ofmt = 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 parsefmt(ufmt); 226 sortby = SORTCPU; 227 ofmt = 1; 228 ufmt[0] = '\0'; 229 break; 230 case 'v': 231 parsefmt(vfmt); 232 sortby = SORTMEM; 233 ofmt = 1; 234 vfmt[0] = '\0'; 235 break; 236 case 'W': 237 swapf = optarg; 238 break; 239 case 'w': 240 if (wflag) 241 termwidth = UNLIMITED; 242 else if (termwidth < 131) 243 termwidth = 131; 244 wflag++; 245 break; 246 case 'x': 247 xflg = 1; 248 break; 249 case '?': 250 default: 251 usage(); 252 } 253 argc -= optind; 254 argv += optind; 255 256 #define BACKWARD_COMPATIBILITY 257 #ifdef BACKWARD_COMPATIBILITY 258 if (*argv) { 259 nlistf = *argv; 260 if (*++argv) { 261 memf = *argv; 262 if (*++argv) 263 swapf = *argv; 264 } 265 } 266 #endif 267 /* 268 * Discard setgid privileges if not the running kernel so that bad 269 * guys can't print interesting stuff from kernel memory. 270 */ 271 if (nlistf != NULL || memf != NULL || swapf != NULL) 272 setgid(getgid()); 273 274 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 275 if (kd == 0) 276 errx(1, "%s", errbuf); 277 278 if (!ofmt) 279 parsefmt(dfmt); 280 281 if (!all && ttydev == NODEV && pid == -1) /* XXX - should be cleaner */ 282 uid = getuid(); 283 284 /* 285 * scan requested variables, noting what structures are needed, 286 * and adjusting header widths as appropiate. 287 */ 288 scanvars(); 289 /* 290 * get proc list 291 */ 292 if (uid != (uid_t) -1) { 293 what = KERN_PROC_UID; 294 flag = uid; 295 } else if (ttydev != NODEV) { 296 what = KERN_PROC_TTY; 297 flag = ttydev; 298 } else if (pid != -1) { 299 what = KERN_PROC_PID; 300 flag = pid; 301 } else { 302 what = KERN_PROC_ALL; 303 flag = 0; 304 } 305 /* 306 * select procs 307 */ 308 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 309 errx(1, "%s", kvm_geterr(kd)); 310 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 311 err(1, NULL); 312 for (i = nentries; --i >= 0; ++kp) { 313 kinfo[i].ki_p = kp; 314 if (needuser) 315 saveuser(&kinfo[i]); 316 } 317 /* 318 * print header 319 */ 320 printheader(); 321 if (nentries == 0) 322 exit(0); 323 /* 324 * sort proc list 325 */ 326 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 327 /* 328 * for each proc, call each variable output function. 329 */ 330 for (i = lineno = 0; i < nentries; i++) { 331 KINFO *ki = &kinfo[i]; 332 333 if (xflg == 0 && (KI_EPROC(ki)->e_tdev == NODEV || 334 (KI_PROC(ki)->p_flag & P_CONTROLT ) == 0)) 335 continue; 336 for (vent = vhead; vent; vent = vent->next) { 337 /* 338 * get arguments if needed 339 */ 340 if (needcomm) { 341 if (commandonly) 342 ki->ki_args = 343 strdup(KI_PROC(ki)->p_comm); 344 else 345 ki->ki_args = 346 fmt(kvm_getargv, ki, 347 KI_PROC(ki)->p_comm, MAXCOMLEN); 348 } else 349 ki->ki_args = NULL; 350 if (needenv) 351 ki->ki_env = 352 fmt(kvm_getenvv, ki, (char *)NULL, 0); 353 else 354 ki->ki_env = NULL; 355 356 (vent->var->oproc)(ki, vent); 357 if (vent->next != NULL) 358 (void)putchar(' '); 359 } 360 (void)putchar('\n'); 361 if (prtheader && lineno++ == prtheader - 4) { 362 (void)putchar('\n'); 363 printheader(); 364 lineno = 0; 365 } 366 } 367 exit(eval); 368 } 369 370 static void 371 scanvars() 372 { 373 struct varent *vent; 374 VAR *v; 375 int i; 376 377 for (vent = vhead; vent; vent = vent->next) { 378 v = vent->var; 379 i = strlen(v->header); 380 if (v->width < i) 381 v->width = i; 382 totwidth += v->width + 1; /* +1 for space */ 383 if (v->flag & USER) 384 needuser = 1; 385 if (v->flag & COMM) 386 needcomm = 1; 387 } 388 totwidth--; 389 } 390 391 static char * 392 fmt(fn, ki, comm, maxlen) 393 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 394 KINFO *ki; 395 char *comm; 396 int maxlen; 397 { 398 char *s; 399 400 if ((s = 401 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 402 err(1, NULL); 403 return (s); 404 } 405 406 static void 407 saveuser(ki) 408 KINFO *ki; 409 { 410 struct pstats pstats; 411 struct usave *usp; 412 413 usp = &ki->ki_u; 414 if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats, 415 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 416 /* 417 * The u-area might be swapped out, and we can't get 418 * at it because we have a crashdump and no swap. 419 * If it's here fill in these fields, otherwise, just 420 * leave them 0. 421 */ 422 usp->u_start = pstats.p_start; 423 usp->u_ru = pstats.p_ru; 424 usp->u_cru = pstats.p_cru; 425 usp->u_valid = 1; 426 } else 427 usp->u_valid = 0; 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) && (cp == s || cp[-1] != 't' && cp[-1] != 'p' && 505 (cp - 1 == s || cp[-2] != 't'))) 506 *ns++ = 'p'; 507 (void)strcpy(ns, cp); /* and append the number */ 508 509 return (newopts); 510 } 511 512 static void 513 usage() 514 { 515 516 (void)fprintf(stderr, 517 "usage:\t%s\n\t %s\n\t%s\n", 518 "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]", 519 "[-M core] [-N system] [-W swap]", 520 "ps [-L]"); 521 exit(1); 522 } 523
Indexes created Wed Sep 24 14:09:57 GMT 2025