ps.c revision 1.23
1 /* $NetBSD: ps.c,v 1.23 1998/07/28 05:31:26 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 1.23 1998/07/28 05:31:26 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 /* NOTREACHED */ 171 case 'l': 172 parsefmt(lfmt); 173 fmt = 1; 174 lfmt[0] = '\0'; 175 break; 176 case 'M': 177 memf = optarg; 178 break; 179 case 'm': 180 sortby = SORTMEM; 181 break; 182 case 'N': 183 nlistf = optarg; 184 break; 185 case 'O': 186 parsefmt(o1); 187 parsefmt(optarg); 188 parsefmt(o2); 189 o1[0] = o2[0] = '\0'; 190 fmt = 1; 191 break; 192 case 'o': 193 parsefmt(optarg); 194 fmt = 1; 195 break; 196 case 'p': 197 pid = atol(optarg); 198 xflg = 1; 199 break; 200 case 'r': 201 sortby = SORTCPU; 202 break; 203 case 'S': 204 sumrusage = 1; 205 break; 206 case 'T': 207 if ((ttname = ttyname(STDIN_FILENO)) == NULL) 208 errx(1, "stdin: not a terminal"); 209 goto tty; 210 case 't': 211 ttname = optarg; 212 tty: { 213 struct stat sb; 214 char *ttypath, pathbuf[MAXPATHLEN]; 215 216 if (strcmp(optarg, "co") == 0) 217 ttypath = _PATH_CONSOLE; 218 else if (*optarg != '/') 219 (void)snprintf(ttypath = pathbuf, 220 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 221 else 222 ttypath = optarg; 223 if (stat(ttypath, &sb) == -1) 224 err(1, "%s", ttypath); 225 if (!S_ISCHR(sb.st_mode)) 226 errx(1, "%s: not a terminal", ttypath); 227 ttydev = sb.st_rdev; 228 break; 229 } 230 case 'u': 231 parsefmt(ufmt); 232 sortby = SORTCPU; 233 fmt = 1; 234 ufmt[0] = '\0'; 235 break; 236 case 'v': 237 parsefmt(vfmt); 238 sortby = SORTMEM; 239 fmt = 1; 240 vfmt[0] = '\0'; 241 break; 242 case 'W': 243 swapf = optarg; 244 break; 245 case 'w': 246 if (wflag) 247 termwidth = UNLIMITED; 248 else if (termwidth < 131) 249 termwidth = 131; 250 wflag++; 251 break; 252 case 'x': 253 xflg = 1; 254 break; 255 case '?': 256 default: 257 usage(); 258 } 259 argc -= optind; 260 argv += optind; 261 262 #define BACKWARD_COMPATIBILITY 263 #ifdef BACKWARD_COMPATIBILITY 264 if (*argv) { 265 nlistf = *argv; 266 if (*++argv) { 267 memf = *argv; 268 if (*++argv) 269 swapf = *argv; 270 } 271 } 272 #endif 273 /* 274 * Discard setgid privileges. If not the running kernel, we toss 275 * them away totally so that bad guys can't print interesting stuff 276 * from kernel memory, otherwise switch back to kmem for the 277 * duration of the kvm_openfiles() call. 278 */ 279 if (nlistf != NULL || memf != NULL || swapf != NULL) 280 (void)setgid(getgid()); 281 else 282 (void)setegid(egid); 283 284 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 285 if (kd == 0) 286 errx(1, "%s", errbuf); 287 288 if (nlistf == NULL && memf == NULL && swapf == NULL) 289 (void)setgid(getgid()); 290 291 if (!fmt) 292 parsefmt(dfmt); 293 294 if (!all && ttydev == NODEV && pid == -1) /* XXX - should be cleaner */ 295 uid = getuid(); 296 297 /* 298 * scan requested variables, noting what structures are needed, 299 * and adjusting header widths as appropiate. 300 */ 301 scanvars(); 302 /* 303 * get proc list 304 */ 305 if (uid != (uid_t) -1) { 306 what = KERN_PROC_UID; 307 flag = uid; 308 } else if (ttydev != NODEV) { 309 what = KERN_PROC_TTY; 310 flag = ttydev; 311 } else if (pid != -1) { 312 what = KERN_PROC_PID; 313 flag = pid; 314 } else { 315 what = KERN_PROC_ALL; 316 flag = 0; 317 } 318 /* 319 * select procs 320 */ 321 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 322 errx(1, "%s", kvm_geterr(kd)); 323 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 324 err(1, "%s", ""); 325 for (i = nentries; --i >= 0; ++kp) { 326 kinfo[i].ki_p = kp; 327 if (needuser) 328 saveuser(&kinfo[i]); 329 } 330 /* 331 * print header 332 */ 333 printheader(); 334 if (nentries == 0) { 335 exit(0); 336 /* NOTREACHED */ 337 } 338 /* 339 * sort proc list 340 */ 341 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 342 /* 343 * for each proc, call each variable output function. 344 */ 345 for (i = lineno = 0; i < nentries; i++) { 346 KINFO *ki = &kinfo[i]; 347 348 if (xflg == 0 && (KI_EPROC(ki)->e_tdev == NODEV || 349 (KI_PROC(ki)->p_flag & P_CONTROLT ) == 0)) 350 continue; 351 for (vent = vhead; vent; vent = vent->next) { 352 (vent->var->oproc)(ki, vent); 353 if (vent->next != NULL) 354 (void)putchar(' '); 355 } 356 (void)putchar('\n'); 357 if (prtheader && lineno++ == prtheader - 4) { 358 (void)putchar('\n'); 359 printheader(); 360 lineno = 0; 361 } 362 } 363 exit(eval); 364 /* NOTREACHED */ 365 } 366 367 static void 368 scanvars() 369 { 370 struct varent *vent; 371 VAR *v; 372 int i; 373 374 for (vent = vhead; vent; vent = vent->next) { 375 v = vent->var; 376 i = strlen(v->header); 377 if (v->width < i) 378 v->width = i; 379 totwidth += v->width + 1; /* +1 for space */ 380 if (v->flag & USER) 381 needuser = 1; 382 if (v->flag & COMM) 383 needcomm = 1; 384 } 385 totwidth--; 386 } 387 388 static void 389 saveuser(ki) 390 KINFO *ki; 391 { 392 struct pstats pstats; 393 struct usave *usp; 394 395 usp = &ki->ki_u; 396 if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats, 397 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 398 /* 399 * The u-area might be swapped out, and we can't get 400 * at it because we have a crashdump and no swap. 401 * If it's here fill in these fields, otherwise, just 402 * leave them 0. 403 */ 404 usp->u_start = pstats.p_start; 405 usp->u_ru = pstats.p_ru; 406 usp->u_cru = pstats.p_cru; 407 usp->u_valid = 1; 408 } else 409 usp->u_valid = 0; 410 } 411 412 static int 413 pscomp(a, b) 414 const void *a, *b; 415 { 416 int i; 417 #ifdef NEWVM 418 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 419 KI_EPROC(k)->e_vm.vm_tsize) 420 #else 421 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 422 #endif 423 424 if (sortby == SORTCPU) 425 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 426 if (sortby == SORTMEM) 427 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 428 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 429 if (i == 0) 430 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 431 return (i); 432 } 433 434 /* 435 * ICK (all for getopt), would rather hide the ugliness 436 * here than taint the main code. 437 * 438 * ps foo -> ps -foo 439 * ps 34 -> ps -p34 440 * 441 * The old convention that 't' with no trailing tty arg means the users 442 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 443 * feature is available with the option 'T', which takes no argument. 444 */ 445 static char * 446 kludge_oldps_options(s) 447 char *s; 448 { 449 size_t len; 450 char *newopts, *ns, *cp; 451 452 len = strlen(s); 453 if ((newopts = ns = malloc(len + 3)) == NULL) 454 err(1, "%s", ""); 455 /* 456 * options begin with '-' 457 */ 458 if (*s != '-') 459 *ns++ = '-'; /* add option flag */ 460 /* 461 * gaze to end of argv[1] 462 */ 463 cp = s + len - 1; 464 /* 465 * if last letter is a 't' flag with no argument (in the context 466 * of the oldps options -- option string NOT starting with a '-' -- 467 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 468 */ 469 if (*cp == 't' && *s != '-') 470 *cp = 'T'; 471 else { 472 /* 473 * otherwise check for trailing number, which *may* be a 474 * pid. 475 */ 476 while (cp >= s && isdigit(*cp)) 477 --cp; 478 } 479 cp++; 480 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 481 ns += cp - s; 482 /* 483 * if there's a trailing number, and not a preceding 'p' (pid) or 484 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 485 */ 486 if (isdigit(*cp) && (cp == s || (cp[-1] != 't' && cp[-1] != 'p' && 487 (cp - 1 == s || cp[-2] != 't')))) 488 *ns++ = 'p'; 489 /* and append the number */ 490 (void)strcpy(ns, cp); /* XXX strcpy is safe */ 491 492 return (newopts); 493 } 494 495 static void 496 usage() 497 { 498 499 (void)fprintf(stderr, 500 "usage:\t%s\n\t %s\n\t%s\n", 501 "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]", 502 "[-M core] [-N system] [-W swap]", 503 "ps [-L]"); 504 exit(1); 505 /* NOTREACHED */ 506 } 507
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