ps.c revision 1.22
1 /* $NetBSD: ps.c,v 1.22 1998/07/27 17:06:48 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 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) 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 __RCSID("$NetBSD: ps.c,v 1.22 1998/07/27 17:06:48 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 <limits.h> 65 #include <nlist.h> 66 #include <paths.h> 67 #include <stdio.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #include <unistd.h> 71 72 #include "ps.h" 73 74 #ifdef P_PPWAIT 75 #define NEWVM 76 #endif 77 78 KINFO *kinfo; 79 struct varent *vhead, *vtail; 80 81 int eval; /* exit value */ 82 int rawcpu; /* -C */ 83 int sumrusage; /* -S */ 84 int termwidth; /* width of screen (0 == infinity) */ 85 int totwidth; /* calculated width of requested variables */ 86 87 int needuser, needcomm, needenv, commandonly; 88 89 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 90 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 int main __P((int, char *[])); 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 gid_t egid = getegid(); 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 const char *ttname; 124 125 (void)setegid(getgid()); 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:uvW:wx")) != -1) 144 switch((char)ch) { 145 case 'a': 146 all = 1; 147 break; 148 case 'c': 149 commandonly = 1; 150 break; 151 case 'e': /* XXX set ufmt */ 152 needenv = 1; 153 break; 154 case 'C': 155 rawcpu = 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 ((ttname = ttyname(STDIN_FILENO)) == NULL) 207 errx(1, "stdin: not a terminal"); 208 goto tty; 209 case 't': 210 ttname = optarg; 211 tty: { 212 struct stat sb; 213 char *ttypath, pathbuf[MAXPATHLEN]; 214 215 if (strcmp(optarg, "co") == 0) 216 ttypath = _PATH_CONSOLE; 217 else if (*optarg != '/') 218 (void)snprintf(ttypath = pathbuf, 219 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 220 else 221 ttypath = optarg; 222 if (stat(ttypath, &sb) == -1) 223 err(1, "%s", ttypath); 224 if (!S_ISCHR(sb.st_mode)) 225 errx(1, "%s: not a terminal", ttypath); 226 ttydev = sb.st_rdev; 227 break; 228 } 229 case 'u': 230 parsefmt(ufmt); 231 sortby = SORTCPU; 232 fmt = 1; 233 ufmt[0] = '\0'; 234 break; 235 case 'v': 236 parsefmt(vfmt); 237 sortby = SORTMEM; 238 fmt = 1; 239 vfmt[0] = '\0'; 240 break; 241 case 'W': 242 swapf = optarg; 243 break; 244 case 'w': 245 if (wflag) 246 termwidth = UNLIMITED; 247 else if (termwidth < 131) 248 termwidth = 131; 249 wflag++; 250 break; 251 case 'x': 252 xflg = 1; 253 break; 254 case '?': 255 default: 256 usage(); 257 } 258 argc -= optind; 259 argv += optind; 260 261 #define BACKWARD_COMPATIBILITY 262 #ifdef BACKWARD_COMPATIBILITY 263 if (*argv) { 264 nlistf = *argv; 265 if (*++argv) { 266 memf = *argv; 267 if (*++argv) 268 swapf = *argv; 269 } 270 } 271 #endif 272 /* 273 * Discard setgid privileges. If not the running kernel, we toss 274 * them away totally so that bad guys can't print interesting stuff 275 * from kernel memory, otherwise switch back to kmem for the 276 * duration of the kvm_openfiles() call. 277 */ 278 if (nlistf != NULL || memf != NULL || swapf != NULL) 279 (void)setgid(getgid()); 280 else 281 (void)setegid(egid); 282 283 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 284 if (kd == 0) 285 errx(1, "%s", errbuf); 286 287 if (nlistf == NULL && memf == NULL && swapf == NULL) 288 (void)setgid(getgid()); 289 290 if (!fmt) 291 parsefmt(dfmt); 292 293 if (!all && ttydev == NODEV && pid == -1) /* XXX - should be cleaner */ 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, "%s", ""); 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 KINFO *ki = &kinfo[i]; 344 345 if (xflg == 0 && (KI_EPROC(ki)->e_tdev == NODEV || 346 (KI_PROC(ki)->p_flag & P_CONTROLT ) == 0)) 347 continue; 348 for (vent = vhead; vent; vent = vent->next) { 349 (vent->var->oproc)(ki, vent); 350 if (vent->next != NULL) 351 (void)putchar(' '); 352 } 353 (void)putchar('\n'); 354 if (prtheader && lineno++ == prtheader - 4) { 355 (void)putchar('\n'); 356 printheader(); 357 lineno = 0; 358 } 359 } 360 exit(eval); 361 } 362 363 static void 364 scanvars() 365 { 366 struct varent *vent; 367 VAR *v; 368 int i; 369 370 for (vent = vhead; vent; vent = vent->next) { 371 v = vent->var; 372 i = strlen(v->header); 373 if (v->width < i) 374 v->width = i; 375 totwidth += v->width + 1; /* +1 for space */ 376 if (v->flag & USER) 377 needuser = 1; 378 if (v->flag & COMM) 379 needcomm = 1; 380 } 381 totwidth--; 382 } 383 384 static void 385 saveuser(ki) 386 KINFO *ki; 387 { 388 struct pstats pstats; 389 struct usave *usp; 390 391 usp = &ki->ki_u; 392 if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats, 393 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 394 /* 395 * The u-area might be swapped out, and we can't get 396 * at it because we have a crashdump and no swap. 397 * If it's here fill in these fields, otherwise, just 398 * leave them 0. 399 */ 400 usp->u_start = pstats.p_start; 401 usp->u_ru = pstats.p_ru; 402 usp->u_cru = pstats.p_cru; 403 usp->u_valid = 1; 404 } else 405 usp->u_valid = 0; 406 } 407 408 static int 409 pscomp(a, b) 410 const void *a, *b; 411 { 412 int i; 413 #ifdef NEWVM 414 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 415 KI_EPROC(k)->e_vm.vm_tsize) 416 #else 417 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 418 #endif 419 420 if (sortby == SORTCPU) 421 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 422 if (sortby == SORTMEM) 423 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 424 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 425 if (i == 0) 426 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 427 return (i); 428 } 429 430 /* 431 * ICK (all for getopt), would rather hide the ugliness 432 * here than taint the main code. 433 * 434 * ps foo -> ps -foo 435 * ps 34 -> ps -p34 436 * 437 * The old convention that 't' with no trailing tty arg means the users 438 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 439 * feature is available with the option 'T', which takes no argument. 440 */ 441 static char * 442 kludge_oldps_options(s) 443 char *s; 444 { 445 size_t len; 446 char *newopts, *ns, *cp; 447 448 len = strlen(s); 449 if ((newopts = ns = malloc(len + 3)) == NULL) 450 err(1, "%s", ""); 451 /* 452 * options begin with '-' 453 */ 454 if (*s != '-') 455 *ns++ = '-'; /* add option flag */ 456 /* 457 * gaze to end of argv[1] 458 */ 459 cp = s + len - 1; 460 /* 461 * if last letter is a 't' flag with no argument (in the context 462 * of the oldps options -- option string NOT starting with a '-' -- 463 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 464 */ 465 if (*cp == 't' && *s != '-') 466 *cp = 'T'; 467 else { 468 /* 469 * otherwise check for trailing number, which *may* be a 470 * pid. 471 */ 472 while (cp >= s && isdigit(*cp)) 473 --cp; 474 } 475 cp++; 476 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 477 ns += cp - s; 478 /* 479 * if there's a trailing number, and not a preceding 'p' (pid) or 480 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 481 */ 482 if (isdigit(*cp) && (cp == s || (cp[-1] != 't' && cp[-1] != 'p' && 483 (cp - 1 == s || cp[-2] != 't')))) 484 *ns++ = 'p'; 485 /* and append the number */ 486 (void)strcpy(ns, cp); /* XXX strcpy is safe */ 487 488 return (newopts); 489 } 490 491 static void 492 usage() 493 { 494 495 (void)fprintf(stderr, 496 "usage:\t%s\n\t %s\n\t%s\n", 497 "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]", 498 "[-M core] [-N system] [-W swap]", 499 "ps [-L]"); 500 exit(1); 501 } 502
Indexes created Mon Sep 22 13:09:51 GMT 2025