ps.c revision 1.21
1 /* $NetBSD: ps.c,v 1.21 1998/07/06 07:50:18 mrg 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 1.21 1998/07/06 07:50:18 mrg 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]; 123 124 (void)setegid(getgid()); 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 "acCeghjLlM:mN:O:o:p:rSTt:uvW:wx")) != -1) 143 switch((char)ch) { 144 case 'a': 145 all = 1; 146 break; 147 case 'c': 148 commandonly = 1; 149 break; 150 case 'e': /* XXX set ufmt */ 151 needenv = 1; 152 break; 153 case 'C': 154 rawcpu = 1; 155 break; 156 case 'g': 157 break; /* no-op */ 158 case 'h': 159 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 160 break; 161 case 'j': 162 parsefmt(jfmt); 163 fmt = 1; 164 jfmt[0] = '\0'; 165 break; 166 case 'L': 167 showkey(); 168 exit(0); 169 case 'l': 170 parsefmt(lfmt); 171 fmt = 1; 172 lfmt[0] = '\0'; 173 break; 174 case 'M': 175 memf = optarg; 176 break; 177 case 'm': 178 sortby = SORTMEM; 179 break; 180 case 'N': 181 nlistf = optarg; 182 break; 183 case 'O': 184 parsefmt(o1); 185 parsefmt(optarg); 186 parsefmt(o2); 187 o1[0] = o2[0] = '\0'; 188 fmt = 1; 189 break; 190 case 'o': 191 parsefmt(optarg); 192 fmt = 1; 193 break; 194 case 'p': 195 pid = atol(optarg); 196 xflg = 1; 197 break; 198 case 'r': 199 sortby = SORTCPU; 200 break; 201 case 'S': 202 sumrusage = 1; 203 break; 204 case 'T': 205 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 206 errx(1, "stdin: not a terminal"); 207 /* FALLTHROUGH */ 208 case 't': { 209 struct stat sb; 210 char *ttypath, pathbuf[MAXPATHLEN]; 211 212 if (strcmp(optarg, "co") == 0) 213 ttypath = _PATH_CONSOLE; 214 else if (*optarg != '/') 215 (void)snprintf(ttypath = pathbuf, 216 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 217 else 218 ttypath = optarg; 219 if (stat(ttypath, &sb) == -1) 220 err(1, "%s", ttypath); 221 if (!S_ISCHR(sb.st_mode)) 222 errx(1, "%s: not a terminal", ttypath); 223 ttydev = sb.st_rdev; 224 break; 225 } 226 case 'u': 227 parsefmt(ufmt); 228 sortby = SORTCPU; 229 fmt = 1; 230 ufmt[0] = '\0'; 231 break; 232 case 'v': 233 parsefmt(vfmt); 234 sortby = SORTMEM; 235 fmt = 1; 236 vfmt[0] = '\0'; 237 break; 238 case 'W': 239 swapf = optarg; 240 break; 241 case 'w': 242 if (wflag) 243 termwidth = UNLIMITED; 244 else if (termwidth < 131) 245 termwidth = 131; 246 wflag++; 247 break; 248 case 'x': 249 xflg = 1; 250 break; 251 case '?': 252 default: 253 usage(); 254 } 255 argc -= optind; 256 argv += optind; 257 258 #define BACKWARD_COMPATIBILITY 259 #ifdef BACKWARD_COMPATIBILITY 260 if (*argv) { 261 nlistf = *argv; 262 if (*++argv) { 263 memf = *argv; 264 if (*++argv) 265 swapf = *argv; 266 } 267 } 268 #endif 269 /* 270 * Discard setgid privileges. If not the running kernel, we toss 271 * them away totally so that bad guys can't print interesting stuff 272 * from kernel memory, otherwise switch back to kmem for the 273 * duration of the kvm_openfiles() call. 274 */ 275 if (nlistf != NULL || memf != NULL || swapf != NULL) 276 (void)setgid(getgid()); 277 else 278 (void)setegid(egid); 279 280 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 281 if (kd == 0) 282 errx(1, "%s", errbuf); 283 284 if (nlistf == NULL && memf == NULL && swapf == NULL) 285 (void)setgid(getgid()); 286 287 if (!fmt) 288 parsefmt(dfmt); 289 290 if (!all && ttydev == NODEV && pid == -1) /* XXX - should be cleaner */ 291 uid = getuid(); 292 293 /* 294 * scan requested variables, noting what structures are needed, 295 * and adjusting header widths as appropiate. 296 */ 297 scanvars(); 298 /* 299 * get proc list 300 */ 301 if (uid != (uid_t) -1) { 302 what = KERN_PROC_UID; 303 flag = uid; 304 } else if (ttydev != NODEV) { 305 what = KERN_PROC_TTY; 306 flag = ttydev; 307 } else if (pid != -1) { 308 what = KERN_PROC_PID; 309 flag = pid; 310 } else { 311 what = KERN_PROC_ALL; 312 flag = 0; 313 } 314 /* 315 * select procs 316 */ 317 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 318 errx(1, "%s", kvm_geterr(kd)); 319 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 320 err(1, "%s", ""); 321 for (i = nentries; --i >= 0; ++kp) { 322 kinfo[i].ki_p = kp; 323 if (needuser) 324 saveuser(&kinfo[i]); 325 } 326 /* 327 * print header 328 */ 329 printheader(); 330 if (nentries == 0) 331 exit(0); 332 /* 333 * sort proc list 334 */ 335 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 336 /* 337 * for each proc, call each variable output function. 338 */ 339 for (i = lineno = 0; i < nentries; i++) { 340 KINFO *ki = &kinfo[i]; 341 342 if (xflg == 0 && (KI_EPROC(ki)->e_tdev == NODEV || 343 (KI_PROC(ki)->p_flag & P_CONTROLT ) == 0)) 344 continue; 345 for (vent = vhead; vent; vent = vent->next) { 346 (vent->var->oproc)(ki, vent); 347 if (vent->next != NULL) 348 (void)putchar(' '); 349 } 350 (void)putchar('\n'); 351 if (prtheader && lineno++ == prtheader - 4) { 352 (void)putchar('\n'); 353 printheader(); 354 lineno = 0; 355 } 356 } 357 exit(eval); 358 } 359 360 static void 361 scanvars() 362 { 363 struct varent *vent; 364 VAR *v; 365 int i; 366 367 for (vent = vhead; vent; vent = vent->next) { 368 v = vent->var; 369 i = strlen(v->header); 370 if (v->width < i) 371 v->width = i; 372 totwidth += v->width + 1; /* +1 for space */ 373 if (v->flag & USER) 374 needuser = 1; 375 if (v->flag & COMM) 376 needcomm = 1; 377 } 378 totwidth--; 379 } 380 381 static void 382 saveuser(ki) 383 KINFO *ki; 384 { 385 struct pstats pstats; 386 struct usave *usp; 387 388 usp = &ki->ki_u; 389 if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats, 390 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 391 /* 392 * The u-area might be swapped out, and we can't get 393 * at it because we have a crashdump and no swap. 394 * If it's here fill in these fields, otherwise, just 395 * leave them 0. 396 */ 397 usp->u_start = pstats.p_start; 398 usp->u_ru = pstats.p_ru; 399 usp->u_cru = pstats.p_cru; 400 usp->u_valid = 1; 401 } else 402 usp->u_valid = 0; 403 } 404 405 static int 406 pscomp(a, b) 407 const void *a, *b; 408 { 409 int i; 410 #ifdef NEWVM 411 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 412 KI_EPROC(k)->e_vm.vm_tsize) 413 #else 414 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 415 #endif 416 417 if (sortby == SORTCPU) 418 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 419 if (sortby == SORTMEM) 420 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 421 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 422 if (i == 0) 423 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 424 return (i); 425 } 426 427 /* 428 * ICK (all for getopt), would rather hide the ugliness 429 * here than taint the main code. 430 * 431 * ps foo -> ps -foo 432 * ps 34 -> ps -p34 433 * 434 * The old convention that 't' with no trailing tty arg means the users 435 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 436 * feature is available with the option 'T', which takes no argument. 437 */ 438 static char * 439 kludge_oldps_options(s) 440 char *s; 441 { 442 size_t len; 443 char *newopts, *ns, *cp; 444 445 len = strlen(s); 446 if ((newopts = ns = malloc(len + 3)) == NULL) 447 err(1, "%s", ""); 448 /* 449 * options begin with '-' 450 */ 451 if (*s != '-') 452 *ns++ = '-'; /* add option flag */ 453 /* 454 * gaze to end of argv[1] 455 */ 456 cp = s + len - 1; 457 /* 458 * if last letter is a 't' flag with no argument (in the context 459 * of the oldps options -- option string NOT starting with a '-' -- 460 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 461 */ 462 if (*cp == 't' && *s != '-') 463 *cp = 'T'; 464 else { 465 /* 466 * otherwise check for trailing number, which *may* be a 467 * pid. 468 */ 469 while (cp >= s && isdigit(*cp)) 470 --cp; 471 } 472 cp++; 473 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 474 ns += cp - s; 475 /* 476 * if there's a trailing number, and not a preceding 'p' (pid) or 477 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 478 */ 479 if (isdigit(*cp) && (cp == s || (cp[-1] != 't' && cp[-1] != 'p' && 480 (cp - 1 == s || cp[-2] != 't')))) 481 *ns++ = 'p'; 482 /* and append the number */ 483 (void)strcpy(ns, cp); /* XXX strcpy is safe */ 484 485 return (newopts); 486 } 487 488 static void 489 usage() 490 { 491 492 (void)fprintf(stderr, 493 "usage:\t%s\n\t %s\n\t%s\n", 494 "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]", 495 "[-M core] [-N system] [-W swap]", 496 "ps [-L]"); 497 exit(1); 498 } 499
Indexes created Tue Sep 23 14:10:03 GMT 2025