ps.c revision 1.39
1 /* $NetBSD: ps.c,v 1.39 2000/06/07 04:58:01 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 1.39 2000/06/07 04:58:01 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; /* -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, mode; 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 mode = PRINTMODE; 136 while ((ch = getopt(argc, argv, 137 "acCeghjKLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1) 138 switch((char)ch) { 139 case 'a': 140 what = KERN_PROC_ALL; 141 flag = 0; 142 break; 143 case 'c': 144 commandonly = 1; 145 break; 146 case 'e': /* XXX set ufmt */ 147 needenv = 1; 148 break; 149 case 'C': 150 rawcpu = 1; 151 break; 152 case 'g': 153 break; /* no-op */ 154 case 'h': 155 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 156 break; 157 case 'j': 158 parsefmt(jfmt); 159 fmt = 1; 160 jfmt[0] = '\0'; 161 break; 162 case 'K': 163 dontuseprocfs=1; 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 dontuseprocfs = 1; 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 what = KERN_PROC_PID; 197 flag = 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 flag = 0; 217 if (strcmp(ttname, "?") == 0) 218 flag = KERN_PROC_TTY_NODEV; 219 else if (strcmp(ttname, "-") == 0) 220 flag = KERN_PROC_TTY_REVOKE; 221 else if (strcmp(ttname, "co") == 0) 222 ttypath = _PATH_CONSOLE; 223 else if (*ttname != '/') 224 (void)snprintf(ttypath = pathbuf, 225 sizeof(pathbuf), "%s%s", _PATH_TTY, ttname); 226 else 227 ttypath = ttname; 228 what = KERN_PROC_TTY; 229 if (flag == 0) { 230 if (stat(ttypath, &sb) == -1) 231 err(1, "%s", ttypath); 232 if (!S_ISCHR(sb.st_mode)) 233 errx(1, "%s: not a terminal", ttypath); 234 flag = sb.st_rdev; 235 } 236 break; 237 } 238 case 'U': 239 if (*optarg != '\0') { 240 struct passwd *pw; 241 char *ep; 242 243 what = KERN_PROC_UID; 244 pw = getpwnam(optarg); 245 if (pw == NULL) { 246 errno = 0; 247 flag = strtoul(optarg, &ep, 10); 248 if (errno) 249 err(1, "%s", optarg); 250 if (*ep != '\0') 251 errx(1, "%s: illegal user name", 252 optarg); 253 } else 254 flag = pw->pw_uid; 255 } 256 break; 257 case 'u': 258 parsefmt(ufmt); 259 sortby = SORTCPU; 260 fmt = 1; 261 ufmt[0] = '\0'; 262 break; 263 case 'v': 264 parsefmt(vfmt); 265 sortby = SORTMEM; 266 fmt = 1; 267 vfmt[0] = '\0'; 268 break; 269 case 'W': 270 swapf = optarg; 271 break; 272 case 'w': 273 if (wflag) 274 termwidth = UNLIMITED; 275 else if (termwidth < 131) 276 termwidth = 131; 277 wflag++; 278 break; 279 case 'x': 280 xflg = 1; 281 break; 282 case '?': 283 default: 284 usage(); 285 } 286 argc -= optind; 287 argv += optind; 288 289 #define BACKWARD_COMPATIBILITY 290 #ifdef BACKWARD_COMPATIBILITY 291 if (*argv) { 292 nlistf = *argv; 293 if (*++argv) { 294 memf = *argv; 295 if (*++argv) 296 swapf = *argv; 297 } 298 } 299 #endif 300 301 if (nlistf == NULL && memf == NULL && swapf == NULL) { 302 kd = kvm_openfiles(nlistf, memf, swapf, KVM_NO_FILES, errbuf); 303 donlist_sysctl(); 304 } else 305 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 306 307 if (kd == 0) { 308 if (dontuseprocfs) 309 errx(1, "%s", errbuf); 310 else { 311 warnx("kvm_openfiles: %s", errbuf); 312 fprintf(stderr, "ps: falling back to /proc-based lookup\n"); 313 } 314 } 315 316 if (!fmt) 317 parsefmt(dfmt); 318 319 /* 320 * scan requested variables, noting what structures are needed. 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 if (nentries == 0) { 351 printheader(); 352 exit(0); 353 } 354 /* 355 * sort proc list 356 */ 357 qsort(kinfo, nentries, sizeof(struct kinfo_proc2), pscomp); 358 /* 359 * For each proc, call each variable output function in 360 * "setwidth" mode to determine the widest element of 361 * the column. 362 */ 363 if (mode == PRINTMODE) 364 for (i = 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, WIDTHMODE); 372 } 373 /* 374 * Print header - AFTER determining process field widths. 375 * printheader() also adds up the total width of all 376 * fields the first time it's called. 377 */ 378 printheader(); 379 /* 380 * For each proc, call each variable output function in 381 * print mode. 382 */ 383 for (i = lineno = 0; i < nentries; i++) { 384 struct kinfo_proc2 *ki = &kinfo[i]; 385 386 if (xflg == 0 && (ki->p_tdev == NODEV || 387 (ki->p_flag & P_CONTROLT ) == 0)) 388 continue; 389 for (vent = vhead; vent; vent = vent->next) { 390 (vent->var->oproc)(ki, vent, mode); 391 if (vent->next != NULL) 392 (void)putchar(' '); 393 } 394 (void)putchar('\n'); 395 if (prtheader && lineno++ == prtheader - 4) { 396 (void)putchar('\n'); 397 printheader(); 398 lineno = 0; 399 } 400 } 401 exit(eval); 402 /* NOTREACHED */ 403 } 404 405 static struct kinfo_proc2 * 406 getkinfo_kvm(kd, what, flag, nentriesp) 407 kvm_t *kd; 408 int what, flag, *nentriesp; 409 { 410 return (kvm_getproc2(kd, what, flag, sizeof(struct kinfo_proc2), 411 nentriesp)); 412 } 413 414 static void 415 scanvars() 416 { 417 struct varent *vent; 418 VAR *v; 419 420 for (vent = vhead; vent; vent = vent->next) { 421 v = vent->var; 422 if (v->flag & COMM) 423 needcomm = 1; 424 } 425 } 426 427 static int 428 pscomp(a, b) 429 const void *a, *b; 430 { 431 struct kinfo_proc2 *ka = (struct kinfo_proc2 *)a; 432 struct kinfo_proc2 *kb = (struct kinfo_proc2 *)b; 433 434 int i; 435 #define VSIZE(k) (k->p_vm_dsize + k->p_vm_ssize + k->p_vm_tsize) 436 437 if (sortby == SORTCPU) 438 return (getpcpu(kb) - getpcpu(ka)); 439 if (sortby == SORTMEM) 440 return (VSIZE(kb) - VSIZE(ka)); 441 i = ka->p_tdev - kb->p_tdev; 442 if (i == 0) 443 i = ka->p_pid - kb->p_pid; 444 445 if (i == 0) 446 i = ka->p_pid - kb->p_pid; 447 return (i); 448 } 449 450 /* 451 * ICK (all for getopt), would rather hide the ugliness 452 * here than taint the main code. 453 * 454 * ps foo -> ps -foo 455 * ps 34 -> ps -p34 456 * 457 * The old convention that 't' with no trailing tty arg means the user's 458 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 459 * feature is available with the option 'T', which takes no argument. 460 */ 461 static char * 462 kludge_oldps_options(s) 463 char *s; 464 { 465 size_t len; 466 char *newopts, *ns, *cp; 467 468 len = strlen(s); 469 if ((newopts = ns = malloc(len + 3)) == NULL) 470 err(1, NULL); 471 /* 472 * options begin with '-' 473 */ 474 if (*s != '-') 475 *ns++ = '-'; /* add option flag */ 476 /* 477 * gaze to end of argv[1] 478 */ 479 cp = s + len - 1; 480 /* 481 * if last letter is a 't' flag with no argument (in the context 482 * of the oldps options -- option string NOT starting with a '-' -- 483 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 484 */ 485 if (*cp == 't' && *s != '-') 486 *cp = 'T'; 487 else { 488 /* 489 * otherwise check for trailing number, which *may* be a 490 * pid. 491 */ 492 while (cp >= s && isdigit(*cp)) 493 --cp; 494 } 495 cp++; 496 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 497 ns += cp - s; 498 /* 499 * if there's a trailing number, and not a preceding 'p' (pid) or 500 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 501 */ 502 if (isdigit(*cp) && 503 (cp == s || (cp[-1] != 'U' && cp[-1] != 't' && cp[-1] != 'p' && 504 (cp - 1 == s || cp[-2] != 't')))) 505 *ns++ = 'p'; 506 /* and append the number */ 507 (void)strcpy(ns, cp); /* XXX strcpy is safe */ 508 509 return (newopts); 510 } 511 512 static void 513 usage() 514 { 515 516 (void)fprintf(stderr, 517 "usage:\t%s\n\t %s\n\t%s\n", 518 "ps [-aChjKlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]", 519 "[-M core] [-N system] [-W swap] [-U username]", 520 "ps [-L]"); 521 exit(1); 522 /* NOTREACHED */ 523 } 524
Indexes created Sat Sep 27 14:09:57 GMT 2025