ps.c revision 1.26
1 /* $NetBSD: ps.c,v 1.26 1999/01/04 16:37:28 kim 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 1.26 1999/01/04 16:37:28 kim 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 <pwd.h> 68 #include <stdio.h> 69 #include <stdlib.h> 70 #include <string.h> 71 #include <unistd.h> 72 73 #include "ps.h" 74 75 #ifdef P_PPWAIT 76 #define NEWVM 77 #endif 78 79 KINFO *kinfo; 80 struct varent *vhead, *vtail; 81 82 int eval; /* exit value */ 83 int rawcpu; /* -C */ 84 int sumrusage; /* -S */ 85 int termwidth; /* width of screen (0 == infinity) */ 86 int totwidth; /* calculated width of requested variables */ 87 88 int needuser, needcomm, needenv, commandonly; 89 90 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 91 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 int main __P((int, char *[])); 98 99 char dfmt[] = "pid tt state time command"; 100 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 101 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 102 char o1[] = "pid"; 103 char o2[] = "tt state time command"; 104 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 105 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 106 107 kvm_t *kd; 108 109 int 110 main(argc, argv) 111 int argc; 112 char *argv[]; 113 { 114 struct kinfo_proc *kp; 115 struct varent *vent; 116 struct winsize ws; 117 gid_t egid = getegid(); 118 int ch, flag, i, fmt, lineno, nentries; 119 int prtheader, wflag, what, xflg; 120 char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX]; 121 char *ttname; 122 123 (void)setegid(getgid()); 124 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 125 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 126 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 127 ws.ws_col == 0) 128 termwidth = 79; 129 else 130 termwidth = ws.ws_col - 1; 131 132 if (argc > 1) 133 argv[1] = kludge_oldps_options(argv[1]); 134 135 fmt = prtheader = wflag = xflg = 0; 136 what = KERN_PROC_UID; 137 flag = getuid(); 138 memf = nlistf = swapf = NULL; 139 while ((ch = getopt(argc, argv, 140 "acCeghjLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1) 141 switch((char)ch) { 142 case 'a': 143 what = KERN_PROC_ALL; 144 flag = 0; 145 break; 146 case 'c': 147 commandonly = 1; 148 break; 149 case 'e': /* XXX set ufmt */ 150 needenv = 1; 151 break; 152 case 'C': 153 rawcpu = 1; 154 break; 155 case 'g': 156 break; /* no-op */ 157 case 'h': 158 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 159 break; 160 case 'j': 161 parsefmt(jfmt); 162 fmt = 1; 163 jfmt[0] = '\0'; 164 break; 165 case 'L': 166 showkey(); 167 exit(0); 168 /* NOTREACHED */ 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 what = KERN_PROC_PID; 196 flag = 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(ttname, "co") == 0) 216 ttypath = _PATH_CONSOLE; 217 else if (*ttname != '/') 218 (void)snprintf(ttypath = pathbuf, 219 sizeof(pathbuf), "%s%s", _PATH_TTY, ttname); 220 else 221 ttypath = ttname; 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 what = KERN_PROC_TTY; 227 flag = sb.st_rdev; 228 break; 229 } 230 case 'U': 231 if (*optarg != '\0') { 232 struct passwd *pw; 233 char *ep; 234 235 what = KERN_PROC_UID; 236 pw = getpwnam(optarg); 237 if (pw == NULL) { 238 errno = 0; 239 flag = strtoul(optarg, &ep, 10); 240 if (errno) 241 err(1, "%s", optarg); 242 if (*ep != '\0') 243 errx(1, "%s: illegal user name", 244 optarg); 245 } else 246 flag = pw->pw_uid; 247 } 248 break; 249 case 'u': 250 parsefmt(ufmt); 251 sortby = SORTCPU; 252 fmt = 1; 253 ufmt[0] = '\0'; 254 break; 255 case 'v': 256 parsefmt(vfmt); 257 sortby = SORTMEM; 258 fmt = 1; 259 vfmt[0] = '\0'; 260 break; 261 case 'W': 262 swapf = optarg; 263 break; 264 case 'w': 265 if (wflag) 266 termwidth = UNLIMITED; 267 else if (termwidth < 131) 268 termwidth = 131; 269 wflag++; 270 break; 271 case 'x': 272 xflg = 1; 273 break; 274 case '?': 275 default: 276 usage(); 277 } 278 argc -= optind; 279 argv += optind; 280 281 #define BACKWARD_COMPATIBILITY 282 #ifdef BACKWARD_COMPATIBILITY 283 if (*argv) { 284 nlistf = *argv; 285 if (*++argv) { 286 memf = *argv; 287 if (*++argv) 288 swapf = *argv; 289 } 290 } 291 #endif 292 /* 293 * Discard setgid privileges. If not the running kernel, we toss 294 * them away totally so that bad guys can't print interesting stuff 295 * from kernel memory, otherwise switch back to kmem for the 296 * duration of the kvm_openfiles() call. 297 */ 298 if (nlistf != NULL || memf != NULL || swapf != NULL) 299 (void)setgid(getgid()); 300 else 301 (void)setegid(egid); 302 303 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 304 if (kd == 0) 305 errx(1, "%s", errbuf); 306 307 if (nlistf == NULL && memf == NULL && swapf == NULL) 308 (void)setgid(getgid()); 309 310 if (!fmt) 311 parsefmt(dfmt); 312 313 /* 314 * scan requested variables, noting what structures are needed, 315 * and adjusting header widths as appropiate. 316 */ 317 scanvars(); 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 /* 337 * sort proc list 338 */ 339 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 340 /* 341 * for each proc, call each variable output function. 342 */ 343 for (i = lineno = 0; i < nentries; i++) { 344 KINFO *ki = &kinfo[i]; 345 346 if (xflg == 0 && (KI_EPROC(ki)->e_tdev == NODEV || 347 (KI_PROC(ki)->p_flag & P_CONTROLT ) == 0)) 348 continue; 349 for (vent = vhead; vent; vent = vent->next) { 350 (vent->var->oproc)(ki, vent); 351 if (vent->next != NULL) 352 (void)putchar(' '); 353 } 354 (void)putchar('\n'); 355 if (prtheader && lineno++ == prtheader - 4) { 356 (void)putchar('\n'); 357 printheader(); 358 lineno = 0; 359 } 360 } 361 exit(eval); 362 /* NOTREACHED */ 363 } 364 365 static void 366 scanvars() 367 { 368 struct varent *vent; 369 VAR *v; 370 int i; 371 372 for (vent = vhead; vent; vent = vent->next) { 373 v = vent->var; 374 i = strlen(v->header); 375 if (v->width < i) 376 v->width = i; 377 totwidth += v->width + 1; /* +1 for space */ 378 if (v->flag & USER) 379 needuser = 1; 380 if (v->flag & COMM) 381 needcomm = 1; 382 } 383 totwidth--; 384 } 385 386 static void 387 saveuser(ki) 388 KINFO *ki; 389 { 390 struct pstats pstats; 391 struct usave *usp; 392 393 usp = &ki->ki_u; 394 if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats, 395 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 396 /* 397 * The u-area might be swapped out, and we can't get 398 * at it because we have a crashdump and no swap. 399 * If it's here fill in these fields, otherwise, just 400 * leave them 0. 401 */ 402 usp->u_start = pstats.p_start; 403 usp->u_ru = pstats.p_ru; 404 usp->u_cru = pstats.p_cru; 405 usp->u_valid = 1; 406 } else 407 usp->u_valid = 0; 408 } 409 410 static int 411 pscomp(a, b) 412 const void *a, *b; 413 { 414 int i; 415 #ifdef NEWVM 416 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 417 KI_EPROC(k)->e_vm.vm_tsize) 418 #else 419 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 420 #endif 421 422 if (sortby == SORTCPU) 423 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 424 if (sortby == SORTMEM) 425 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 426 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 427 if (i == 0) 428 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 429 return (i); 430 } 431 432 /* 433 * ICK (all for getopt), would rather hide the ugliness 434 * here than taint the main code. 435 * 436 * ps foo -> ps -foo 437 * ps 34 -> ps -p34 438 * 439 * The old convention that 't' with no trailing tty arg means the user's 440 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 441 * feature is available with the option 'T', which takes no argument. 442 */ 443 static char * 444 kludge_oldps_options(s) 445 char *s; 446 { 447 size_t len; 448 char *newopts, *ns, *cp; 449 450 len = strlen(s); 451 if ((newopts = ns = malloc(len + 3)) == NULL) 452 err(1, "%s", ""); 453 /* 454 * options begin with '-' 455 */ 456 if (*s != '-') 457 *ns++ = '-'; /* add option flag */ 458 /* 459 * gaze to end of argv[1] 460 */ 461 cp = s + len - 1; 462 /* 463 * if last letter is a 't' flag with no argument (in the context 464 * of the oldps options -- option string NOT starting with a '-' -- 465 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 466 */ 467 if (*cp == 't' && *s != '-') 468 *cp = 'T'; 469 else { 470 /* 471 * otherwise check for trailing number, which *may* be a 472 * pid. 473 */ 474 while (cp >= s && isdigit(*cp)) 475 --cp; 476 } 477 cp++; 478 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 479 ns += cp - s; 480 /* 481 * if there's a trailing number, and not a preceding 'p' (pid) or 482 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 483 */ 484 if (isdigit(*cp) && 485 (cp == s || (cp[-1] != 'U' && cp[-1] != 't' && cp[-1] != 'p' && 486 (cp - 1 == s || cp[-2] != 't')))) 487 *ns++ = 'p'; 488 /* and append the number */ 489 (void)strcpy(ns, cp); /* XXX strcpy is safe */ 490 491 return (newopts); 492 } 493 494 static void 495 usage() 496 { 497 498 (void)fprintf(stderr, 499 "usage:\t%s\n\t %s\n\t%s\n", 500 "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]", 501 "[-M core] [-N system] [-W swap]", 502 "ps [-L]"); 503 exit(1); 504 /* NOTREACHED */ 505 } 506
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