ps.c revision 1.38
1 /* $NetBSD: ps.c,v 1.38 2000/05/26 03:04:28 simonb 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 1.38 2000/05/26 03:04:28 simonb 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 struct kinfo_proc2 *kinfo; 76 struct varent *vhead, *vtail; 77 78 int eval; /* exit value */ 79 int rawcpu; /* -C */ 80 int sumrusage; /* -S */ 81 int dontuseprocfs=0; /* -K */ 82 int termwidth; /* width of screen (0 == infinity) */ 83 int totwidth; /* calculated width of requested variables */ 84 85 int needcomm, needenv, commandonly, use_procfs; 86 uid_t myuid; 87 88 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 89 90 static struct kinfo_proc2 91 *getkinfo_kvm __P((kvm_t *, int, int, int *)); 92 static char *kludge_oldps_options __P((char *)); 93 static int pscomp __P((const void *, const void *)); 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 varent *vent; 114 struct winsize ws; 115 int ch, flag, i, fmt, lineno, nentries; 116 int prtheader, wflag, what, xflg; 117 char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX]; 118 char *ttname; 119 120 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 121 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 122 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 123 ws.ws_col == 0) 124 termwidth = 79; 125 else 126 termwidth = ws.ws_col - 1; 127 128 if (argc > 1) 129 argv[1] = kludge_oldps_options(argv[1]); 130 131 fmt = prtheader = wflag = xflg = 0; 132 what = KERN_PROC_UID; 133 flag = myuid = getuid(); 134 memf = nlistf = swapf = NULL; 135 while ((ch = getopt(argc, argv, 136 "acCeghjKLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1) 137 switch((char)ch) { 138 case 'a': 139 what = KERN_PROC_ALL; 140 flag = 0; 141 break; 142 case 'c': 143 commandonly = 1; 144 break; 145 case 'e': /* XXX set ufmt */ 146 needenv = 1; 147 break; 148 case 'C': 149 rawcpu = 1; 150 break; 151 case 'g': 152 break; /* no-op */ 153 case 'h': 154 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 155 break; 156 case 'j': 157 parsefmt(jfmt); 158 fmt = 1; 159 jfmt[0] = '\0'; 160 break; 161 case 'K': 162 dontuseprocfs=1; 163 break; 164 case 'L': 165 showkey(); 166 exit(0); 167 /* NOTREACHED */ 168 case 'l': 169 parsefmt(lfmt); 170 fmt = 1; 171 lfmt[0] = '\0'; 172 break; 173 case 'M': 174 memf = optarg; 175 dontuseprocfs = 1; 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 flag = 0; 216 if (strcmp(ttname, "?") == 0) 217 flag = KERN_PROC_TTY_NODEV; 218 else if (strcmp(ttname, "-") == 0) 219 flag = KERN_PROC_TTY_REVOKE; 220 else if (strcmp(ttname, "co") == 0) 221 ttypath = _PATH_CONSOLE; 222 else if (*ttname != '/') 223 (void)snprintf(ttypath = pathbuf, 224 sizeof(pathbuf), "%s%s", _PATH_TTY, ttname); 225 else 226 ttypath = ttname; 227 what = KERN_PROC_TTY; 228 if (flag == 0) { 229 if (stat(ttypath, &sb) == -1) 230 err(1, "%s", ttypath); 231 if (!S_ISCHR(sb.st_mode)) 232 errx(1, "%s: not a terminal", ttypath); 233 flag = sb.st_rdev; 234 } 235 break; 236 } 237 case 'U': 238 if (*optarg != '\0') { 239 struct passwd *pw; 240 char *ep; 241 242 what = KERN_PROC_UID; 243 pw = getpwnam(optarg); 244 if (pw == NULL) { 245 errno = 0; 246 flag = strtoul(optarg, &ep, 10); 247 if (errno) 248 err(1, "%s", optarg); 249 if (*ep != '\0') 250 errx(1, "%s: illegal user name", 251 optarg); 252 } else 253 flag = pw->pw_uid; 254 } 255 break; 256 case 'u': 257 parsefmt(ufmt); 258 sortby = SORTCPU; 259 fmt = 1; 260 ufmt[0] = '\0'; 261 break; 262 case 'v': 263 parsefmt(vfmt); 264 sortby = SORTMEM; 265 fmt = 1; 266 vfmt[0] = '\0'; 267 break; 268 case 'W': 269 swapf = optarg; 270 break; 271 case 'w': 272 if (wflag) 273 termwidth = UNLIMITED; 274 else if (termwidth < 131) 275 termwidth = 131; 276 wflag++; 277 break; 278 case 'x': 279 xflg = 1; 280 break; 281 case '?': 282 default: 283 usage(); 284 } 285 argc -= optind; 286 argv += optind; 287 288 #define BACKWARD_COMPATIBILITY 289 #ifdef BACKWARD_COMPATIBILITY 290 if (*argv) { 291 nlistf = *argv; 292 if (*++argv) { 293 memf = *argv; 294 if (*++argv) 295 swapf = *argv; 296 } 297 } 298 #endif 299 300 if (nlistf == NULL && memf == NULL && swapf == NULL) { 301 kd = kvm_openfiles(nlistf, memf, swapf, KVM_NO_FILES, errbuf); 302 donlist_sysctl(); 303 } else 304 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 305 306 if (kd == 0) { 307 if (dontuseprocfs) 308 errx(1, "%s", errbuf); 309 else { 310 warnx("kvm_openfiles: %s", errbuf); 311 fprintf(stderr, "ps: falling back to /proc-based lookup\n"); 312 } 313 } 314 315 if (!fmt) 316 parsefmt(dfmt); 317 318 /* 319 * scan requested variables, noting what structures are needed, 320 * and adjusting header widths as appropiate. 321 */ 322 scanvars(); 323 324 /* 325 * select procs 326 */ 327 if (!kd || !(kinfo = getkinfo_kvm(kd, what, flag, &nentries))) 328 { 329 /* If/when the /proc-based code is ripped out 330 * again, make sure all references to the -K 331 * option are also pulled (getopt(), usage(), 332 * man page). See the man page comments about 333 * this for more details. */ 334 if (kd) 335 warnx("%s.", kvm_geterr(kd)); 336 if (dontuseprocfs) 337 exit(1); 338 339 /* procfs_getprocs supports all but the 340 * KERN_PROC_RUID flag. */ 341 kinfo = getkinfo_procfs(what, flag, &nentries); 342 if (kinfo == 0) 343 errx(1, "fallback /proc-based lookup also failed. %s", 344 "Giving up..."); 345 fprintf(stderr, "%s%s", 346 "Warning: /proc does not provide ", 347 "valid data for all fields.\n"); 348 use_procfs = 1; 349 } 350 351 /* 352 * print header 353 */ 354 printheader(); 355 if (nentries == 0) 356 exit(0); 357 /* 358 * sort proc list 359 */ 360 qsort(kinfo, nentries, sizeof(struct kinfo_proc2), pscomp); 361 /* 362 * for each proc, call each variable output function. 363 */ 364 for (i = lineno = 0; i < nentries; i++) { 365 struct kinfo_proc2 *ki = &kinfo[i]; 366 367 if (xflg == 0 && (ki->p_tdev == NODEV || 368 (ki->p_flag & P_CONTROLT ) == 0)) 369 continue; 370 for (vent = vhead; vent; vent = vent->next) { 371 (vent->var->oproc)(ki, vent); 372 if (vent->next != NULL) 373 (void)putchar(' '); 374 } 375 (void)putchar('\n'); 376 if (prtheader && lineno++ == prtheader - 4) { 377 (void)putchar('\n'); 378 printheader(); 379 lineno = 0; 380 } 381 } 382 exit(eval); 383 /* NOTREACHED */ 384 } 385 386 static struct kinfo_proc2 * 387 getkinfo_kvm(kd, what, flag, nentriesp) 388 kvm_t *kd; 389 int what, flag, *nentriesp; 390 { 391 return (kvm_getproc2(kd, what, flag, sizeof(struct kinfo_proc2), 392 nentriesp)); 393 } 394 395 static void 396 scanvars() 397 { 398 struct varent *vent; 399 VAR *v; 400 int i; 401 402 for (vent = vhead; vent; vent = vent->next) { 403 v = vent->var; 404 i = strlen(v->header); 405 if (v->width < i) 406 v->width = i; 407 totwidth += v->width + 1; /* +1 for space */ 408 if (v->flag & COMM) 409 needcomm = 1; 410 } 411 totwidth--; 412 } 413 414 static int 415 pscomp(a, b) 416 const void *a, *b; 417 { 418 struct kinfo_proc2 *ka = (struct kinfo_proc2 *)a; 419 struct kinfo_proc2 *kb = (struct kinfo_proc2 *)b; 420 421 int i; 422 #define VSIZE(k) (k->p_vm_dsize + k->p_vm_ssize + k->p_vm_tsize) 423 424 if (sortby == SORTCPU) 425 return (getpcpu(kb) - getpcpu(ka)); 426 if (sortby == SORTMEM) 427 return (VSIZE(kb) - VSIZE(ka)); 428 i = ka->p_tdev - kb->p_tdev; 429 if (i == 0) 430 i = ka->p_pid - kb->p_pid; 431 432 if (i == 0) 433 i = ka->p_pid - kb->p_pid; 434 return (i); 435 } 436 437 /* 438 * ICK (all for getopt), would rather hide the ugliness 439 * here than taint the main code. 440 * 441 * ps foo -> ps -foo 442 * ps 34 -> ps -p34 443 * 444 * The old convention that 't' with no trailing tty arg means the user's 445 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 446 * feature is available with the option 'T', which takes no argument. 447 */ 448 static char * 449 kludge_oldps_options(s) 450 char *s; 451 { 452 size_t len; 453 char *newopts, *ns, *cp; 454 455 len = strlen(s); 456 if ((newopts = ns = malloc(len + 3)) == NULL) 457 err(1, NULL); 458 /* 459 * options begin with '-' 460 */ 461 if (*s != '-') 462 *ns++ = '-'; /* add option flag */ 463 /* 464 * gaze to end of argv[1] 465 */ 466 cp = s + len - 1; 467 /* 468 * if last letter is a 't' flag with no argument (in the context 469 * of the oldps options -- option string NOT starting with a '-' -- 470 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 471 */ 472 if (*cp == 't' && *s != '-') 473 *cp = 'T'; 474 else { 475 /* 476 * otherwise check for trailing number, which *may* be a 477 * pid. 478 */ 479 while (cp >= s && isdigit(*cp)) 480 --cp; 481 } 482 cp++; 483 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 484 ns += cp - s; 485 /* 486 * if there's a trailing number, and not a preceding 'p' (pid) or 487 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 488 */ 489 if (isdigit(*cp) && 490 (cp == s || (cp[-1] != 'U' && cp[-1] != 't' && cp[-1] != 'p' && 491 (cp - 1 == s || cp[-2] != 't')))) 492 *ns++ = 'p'; 493 /* and append the number */ 494 (void)strcpy(ns, cp); /* XXX strcpy is safe */ 495 496 return (newopts); 497 } 498 499 static void 500 usage() 501 { 502 503 (void)fprintf(stderr, 504 "usage:\t%s\n\t %s\n\t%s\n", 505 "ps [-aChjKlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]", 506 "[-M core] [-N system] [-W swap] [-U username]", 507 "ps [-L]"); 508 exit(1); 509 /* NOTREACHED */ 510 } 511
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