ps.c revision 1.17
1 /* $NetBSD: ps.c,v 1.17 1997/02/28 13:34:50 pk 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 #ifndef lint 37 static char copyright[] = 38 "@(#) 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 static char rcsid[] = "$NetBSD: ps.c,v 1.17 1997/02/28 13:34:50 pk 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 97 char dfmt[] = "pid tt state time command"; 98 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 99 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 100 char o1[] = "pid"; 101 char o2[] = "tt state time command"; 102 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 103 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 104 105 kvm_t *kd; 106 107 int 108 main(argc, argv) 109 int argc; 110 char *argv[]; 111 { 112 struct kinfo_proc *kp; 113 struct varent *vent; 114 struct winsize ws; 115 dev_t ttydev; 116 pid_t pid; 117 uid_t uid; 118 int all, ch, flag, i, fmt, lineno, nentries; 119 int prtheader, wflag, what, xflg; 120 char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX]; 121 122 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 123 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 124 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 125 ws.ws_col == 0) 126 termwidth = 79; 127 else 128 termwidth = ws.ws_col - 1; 129 130 if (argc > 1) 131 argv[1] = kludge_oldps_options(argv[1]); 132 133 all = fmt = prtheader = wflag = xflg = 0; 134 pid = -1; 135 uid = (uid_t) -1; 136 ttydev = NODEV; 137 memf = nlistf = swapf = NULL; 138 while ((ch = getopt(argc, argv, 139 "acCeghjLlM:mN:O:o:p:rSTt:uvW:wx")) != EOF) 140 switch((char)ch) { 141 case 'a': 142 all = 1; 143 break; 144 case 'c': 145 commandonly = 1; 146 break; 147 case 'e': /* XXX set ufmt */ 148 needenv = 1; 149 break; 150 case 'C': 151 rawcpu = 1; 152 break; 153 case 'g': 154 break; /* no-op */ 155 case 'h': 156 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 157 break; 158 case 'j': 159 parsefmt(jfmt); 160 fmt = 1; 161 jfmt[0] = '\0'; 162 break; 163 case 'L': 164 showkey(); 165 exit(0); 166 case 'l': 167 parsefmt(lfmt); 168 fmt = 1; 169 lfmt[0] = '\0'; 170 break; 171 case 'M': 172 memf = optarg; 173 break; 174 case 'm': 175 sortby = SORTMEM; 176 break; 177 case 'N': 178 nlistf = optarg; 179 break; 180 case 'O': 181 parsefmt(o1); 182 parsefmt(optarg); 183 parsefmt(o2); 184 o1[0] = o2[0] = '\0'; 185 fmt = 1; 186 break; 187 case 'o': 188 parsefmt(optarg); 189 fmt = 1; 190 break; 191 case 'p': 192 pid = atol(optarg); 193 xflg = 1; 194 break; 195 case 'r': 196 sortby = SORTCPU; 197 break; 198 case 'S': 199 sumrusage = 1; 200 break; 201 case 'T': 202 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 203 errx(1, "stdin: not a terminal"); 204 /* FALLTHROUGH */ 205 case 't': { 206 struct stat sb; 207 char *ttypath, pathbuf[MAXPATHLEN]; 208 209 if (strcmp(optarg, "co") == 0) 210 ttypath = _PATH_CONSOLE; 211 else if (*optarg != '/') 212 (void)snprintf(ttypath = pathbuf, 213 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 214 else 215 ttypath = optarg; 216 if (stat(ttypath, &sb) == -1) 217 err(1, "%s", ttypath); 218 if (!S_ISCHR(sb.st_mode)) 219 errx(1, "%s: not a terminal", ttypath); 220 ttydev = sb.st_rdev; 221 break; 222 } 223 case 'u': 224 parsefmt(ufmt); 225 sortby = SORTCPU; 226 fmt = 1; 227 ufmt[0] = '\0'; 228 break; 229 case 'v': 230 parsefmt(vfmt); 231 sortby = SORTMEM; 232 fmt = 1; 233 vfmt[0] = '\0'; 234 break; 235 case 'W': 236 swapf = optarg; 237 break; 238 case 'w': 239 if (wflag) 240 termwidth = UNLIMITED; 241 else if (termwidth < 131) 242 termwidth = 131; 243 wflag++; 244 break; 245 case 'x': 246 xflg = 1; 247 break; 248 case '?': 249 default: 250 usage(); 251 } 252 argc -= optind; 253 argv += optind; 254 255 #define BACKWARD_COMPATIBILITY 256 #ifdef BACKWARD_COMPATIBILITY 257 if (*argv) { 258 nlistf = *argv; 259 if (*++argv) { 260 memf = *argv; 261 if (*++argv) 262 swapf = *argv; 263 } 264 } 265 #endif 266 /* 267 * Discard setgid privileges if not the running kernel so that bad 268 * guys can't print interesting stuff from kernel memory. 269 */ 270 if (nlistf != NULL || memf != NULL || swapf != NULL) 271 setgid(getgid()); 272 273 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 274 if (kd == 0) 275 errx(1, "%s", errbuf); 276 277 if (!fmt) 278 parsefmt(dfmt); 279 280 if (!all && ttydev == NODEV && pid == -1) /* XXX - should be cleaner */ 281 uid = getuid(); 282 283 /* 284 * scan requested variables, noting what structures are needed, 285 * and adjusting header widths as appropiate. 286 */ 287 scanvars(); 288 /* 289 * get proc list 290 */ 291 if (uid != (uid_t) -1) { 292 what = KERN_PROC_UID; 293 flag = uid; 294 } else if (ttydev != NODEV) { 295 what = KERN_PROC_TTY; 296 flag = ttydev; 297 } else if (pid != -1) { 298 what = KERN_PROC_PID; 299 flag = pid; 300 } else { 301 what = KERN_PROC_ALL; 302 flag = 0; 303 } 304 /* 305 * select procs 306 */ 307 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 308 errx(1, "%s", kvm_geterr(kd)); 309 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 310 err(1, NULL); 311 for (i = nentries; --i >= 0; ++kp) { 312 kinfo[i].ki_p = kp; 313 if (needuser) 314 saveuser(&kinfo[i]); 315 } 316 /* 317 * print header 318 */ 319 printheader(); 320 if (nentries == 0) 321 exit(0); 322 /* 323 * sort proc list 324 */ 325 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 326 /* 327 * for each proc, call each variable output function. 328 */ 329 for (i = lineno = 0; i < nentries; i++) { 330 KINFO *ki = &kinfo[i]; 331 332 if (xflg == 0 && (KI_EPROC(ki)->e_tdev == NODEV || 333 (KI_PROC(ki)->p_flag & P_CONTROLT ) == 0)) 334 continue; 335 for (vent = vhead; vent; vent = vent->next) { 336 (vent->var->oproc)(ki, vent); 337 if (vent->next != NULL) 338 (void)putchar(' '); 339 } 340 (void)putchar('\n'); 341 if (prtheader && lineno++ == prtheader - 4) { 342 (void)putchar('\n'); 343 printheader(); 344 lineno = 0; 345 } 346 } 347 exit(eval); 348 } 349 350 static void 351 scanvars() 352 { 353 struct varent *vent; 354 VAR *v; 355 int i; 356 357 for (vent = vhead; vent; vent = vent->next) { 358 v = vent->var; 359 i = strlen(v->header); 360 if (v->width < i) 361 v->width = i; 362 totwidth += v->width + 1; /* +1 for space */ 363 if (v->flag & USER) 364 needuser = 1; 365 if (v->flag & COMM) 366 needcomm = 1; 367 } 368 totwidth--; 369 } 370 371 static void 372 saveuser(ki) 373 KINFO *ki; 374 { 375 struct pstats pstats; 376 struct usave *usp; 377 378 usp = &ki->ki_u; 379 if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats, 380 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 381 /* 382 * The u-area might be swapped out, and we can't get 383 * at it because we have a crashdump and no swap. 384 * If it's here fill in these fields, otherwise, just 385 * leave them 0. 386 */ 387 usp->u_start = pstats.p_start; 388 usp->u_ru = pstats.p_ru; 389 usp->u_cru = pstats.p_cru; 390 usp->u_valid = 1; 391 } else 392 usp->u_valid = 0; 393 } 394 395 static int 396 pscomp(a, b) 397 const void *a, *b; 398 { 399 int i; 400 #ifdef NEWVM 401 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 402 KI_EPROC(k)->e_vm.vm_tsize) 403 #else 404 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 405 #endif 406 407 if (sortby == SORTCPU) 408 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 409 if (sortby == SORTMEM) 410 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 411 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 412 if (i == 0) 413 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 414 return (i); 415 } 416 417 /* 418 * ICK (all for getopt), would rather hide the ugliness 419 * here than taint the main code. 420 * 421 * ps foo -> ps -foo 422 * ps 34 -> ps -p34 423 * 424 * The old convention that 't' with no trailing tty arg means the users 425 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 426 * feature is available with the option 'T', which takes no argument. 427 */ 428 static char * 429 kludge_oldps_options(s) 430 char *s; 431 { 432 size_t len; 433 char *newopts, *ns, *cp; 434 435 len = strlen(s); 436 if ((newopts = ns = malloc(len + 3)) == NULL) 437 err(1, NULL); 438 /* 439 * options begin with '-' 440 */ 441 if (*s != '-') 442 *ns++ = '-'; /* add option flag */ 443 /* 444 * gaze to end of argv[1] 445 */ 446 cp = s + len - 1; 447 /* 448 * if last letter is a 't' flag with no argument (in the context 449 * of the oldps options -- option string NOT starting with a '-' -- 450 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 451 */ 452 if (*cp == 't' && *s != '-') 453 *cp = 'T'; 454 else { 455 /* 456 * otherwise check for trailing number, which *may* be a 457 * pid. 458 */ 459 while (cp >= s && isdigit(*cp)) 460 --cp; 461 } 462 cp++; 463 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 464 ns += cp - s; 465 /* 466 * if there's a trailing number, and not a preceding 'p' (pid) or 467 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 468 */ 469 if (isdigit(*cp) && (cp == s || cp[-1] != 't' && cp[-1] != 'p' && 470 (cp - 1 == s || cp[-2] != 't'))) 471 *ns++ = 'p'; 472 (void)strcpy(ns, cp); /* and append the number */ 473 474 return (newopts); 475 } 476 477 static void 478 usage() 479 { 480 481 (void)fprintf(stderr, 482 "usage:\t%s\n\t %s\n\t%s\n", 483 "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]", 484 "[-M core] [-N system] [-W swap]", 485 "ps [-L]"); 486 exit(1); 487 } 488
Indexes created Tue Sep 23 07:09:52 GMT 2025