ps.c revision 1.11
1 /*- 2 * Copyright (c) 1990, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1990, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/user.h> 46 #include <sys/time.h> 47 #include <sys/resource.h> 48 #include <sys/proc.h> 49 #include <sys/stat.h> 50 #include <sys/ioctl.h> 51 #include <sys/sysctl.h> 52 53 #include <ctype.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <fcntl.h> 57 #include <kvm.h> 58 #include <nlist.h> 59 #include <paths.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 #include "ps.h" 66 67 #ifdef P_PPWAIT 68 #define NEWVM 69 #endif 70 71 KINFO *kinfo; 72 struct varent *vhead, *vtail; 73 74 int eval; /* exit value */ 75 int rawcpu; /* -C */ 76 int sumrusage; /* -S */ 77 int termwidth; /* width of screen (0 == infinity) */ 78 int totwidth; /* calculated width of requested variables */ 79 80 static int needuser, needcomm, needenv; 81 82 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 83 84 static char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int), 85 KINFO *, char *, int)); 86 static char *kludge_oldps_options __P((char *)); 87 static int pscomp __P((const void *, const void *)); 88 static void saveuser __P((KINFO *)); 89 static void scanvars __P((void)); 90 static void usage __P((void)); 91 92 char dfmt[] = "pid tt state time command"; 93 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 94 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 95 char o1[] = "pid"; 96 char o2[] = "tt state time command"; 97 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 98 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 99 100 kvm_t *kd; 101 102 int 103 main(argc, argv) 104 int argc; 105 char *argv[]; 106 { 107 struct kinfo_proc *kp; 108 struct varent *vent; 109 struct winsize ws; 110 dev_t ttydev; 111 pid_t pid; 112 uid_t uid; 113 int all, ch, flag, i, fmt, lineno, nentries; 114 int prtheader, wflag, what, xflg; 115 char *nlistf, *memf, *swapf, errbuf[256]; 116 117 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 118 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 119 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 120 ws.ws_col == 0) 121 termwidth = 79; 122 else 123 termwidth = ws.ws_col - 1; 124 125 if (argc > 1) 126 argv[1] = kludge_oldps_options(argv[1]); 127 128 all = fmt = prtheader = wflag = xflg = 0; 129 pid = -1; 130 uid = (uid_t) -1; 131 ttydev = NODEV; 132 memf = nlistf = swapf = NULL; 133 while ((ch = getopt(argc, argv, 134 "aCeghjLlM:mN:O:o:p:rSTt:uvW:wx")) != EOF) 135 switch((char)ch) { 136 case 'a': 137 all = 1; 138 break; 139 case 'e': /* XXX set ufmt */ 140 needenv = 1; 141 break; 142 case 'C': 143 rawcpu = 1; 144 break; 145 case 'g': 146 break; /* no-op */ 147 case 'h': 148 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 149 break; 150 case 'j': 151 parsefmt(jfmt); 152 fmt = 1; 153 jfmt[0] = '\0'; 154 break; 155 case 'L': 156 showkey(); 157 exit(0); 158 case 'l': 159 parsefmt(lfmt); 160 fmt = 1; 161 lfmt[0] = '\0'; 162 break; 163 case 'M': 164 memf = optarg; 165 break; 166 case 'm': 167 sortby = SORTMEM; 168 break; 169 case 'N': 170 nlistf = optarg; 171 break; 172 case 'O': 173 parsefmt(o1); 174 parsefmt(optarg); 175 parsefmt(o2); 176 o1[0] = o2[0] = '\0'; 177 fmt = 1; 178 break; 179 case 'o': 180 parsefmt(optarg); 181 fmt = 1; 182 break; 183 case 'p': 184 pid = atol(optarg); 185 xflg = 1; 186 break; 187 case 'r': 188 sortby = SORTCPU; 189 break; 190 case 'S': 191 sumrusage = 1; 192 break; 193 case 'T': 194 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 195 errx(1, "stdin: not a terminal"); 196 /* FALLTHROUGH */ 197 case 't': { 198 struct stat sb; 199 char *ttypath, pathbuf[MAXPATHLEN]; 200 201 if (strcmp(optarg, "co") == 0) 202 ttypath = _PATH_CONSOLE; 203 else if (*optarg != '/') 204 (void)snprintf(ttypath = pathbuf, 205 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 206 else 207 ttypath = optarg; 208 if (stat(ttypath, &sb) == -1) 209 err(1, "%s", ttypath); 210 if (!S_ISCHR(sb.st_mode)) 211 errx(1, "%s: not a terminal", ttypath); 212 ttydev = sb.st_rdev; 213 break; 214 } 215 case 'u': 216 parsefmt(ufmt); 217 sortby = SORTCPU; 218 fmt = 1; 219 ufmt[0] = '\0'; 220 break; 221 case 'v': 222 parsefmt(vfmt); 223 sortby = SORTMEM; 224 fmt = 1; 225 vfmt[0] = '\0'; 226 break; 227 case 'W': 228 swapf = optarg; 229 break; 230 case 'w': 231 if (wflag) 232 termwidth = UNLIMITED; 233 else if (termwidth < 131) 234 termwidth = 131; 235 wflag++; 236 break; 237 case 'x': 238 xflg = 1; 239 break; 240 case '?': 241 default: 242 usage(); 243 } 244 argc -= optind; 245 argv += optind; 246 247 #define BACKWARD_COMPATIBILITY 248 #ifdef BACKWARD_COMPATIBILITY 249 if (*argv) { 250 nlistf = *argv; 251 if (*++argv) { 252 memf = *argv; 253 if (*++argv) 254 swapf = *argv; 255 } 256 } 257 #endif 258 /* 259 * Discard setgid privileges if not the running kernel so that bad 260 * guys can't print interesting stuff from kernel memory. 261 */ 262 if (nlistf != NULL || memf != NULL || swapf != NULL) 263 setgid(getgid()); 264 265 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 266 if (kd == 0) 267 errx(1, "%s", errbuf); 268 269 if (!fmt) 270 parsefmt(dfmt); 271 272 if (!all && ttydev == NODEV && pid == -1) /* XXX - should be cleaner */ 273 uid = getuid(); 274 275 /* 276 * scan requested variables, noting what structures are needed, 277 * and adjusting header widths as appropiate. 278 */ 279 scanvars(); 280 /* 281 * get proc list 282 */ 283 if (uid != (uid_t) -1) { 284 what = KERN_PROC_UID; 285 flag = uid; 286 } else if (ttydev != NODEV) { 287 what = KERN_PROC_TTY; 288 flag = ttydev; 289 } else if (pid != -1) { 290 what = KERN_PROC_PID; 291 flag = pid; 292 } else { 293 what = KERN_PROC_ALL; 294 flag = 0; 295 } 296 /* 297 * select procs 298 */ 299 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 300 errx(1, "%s", kvm_geterr(kd)); 301 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 302 err(1, NULL); 303 for (i = nentries; --i >= 0; ++kp) { 304 kinfo[i].ki_p = kp; 305 if (needuser) 306 saveuser(&kinfo[i]); 307 } 308 /* 309 * print header 310 */ 311 printheader(); 312 if (nentries == 0) 313 exit(0); 314 /* 315 * sort proc list 316 */ 317 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 318 /* 319 * for each proc, call each variable output function. 320 */ 321 for (i = lineno = 0; i < nentries; i++) { 322 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 323 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 324 continue; 325 for (vent = vhead; vent; vent = vent->next) { 326 (vent->var->oproc)(&kinfo[i], vent); 327 if (vent->next != NULL) 328 (void)putchar(' '); 329 } 330 (void)putchar('\n'); 331 if (prtheader && lineno++ == prtheader - 4) { 332 (void)putchar('\n'); 333 printheader(); 334 lineno = 0; 335 } 336 } 337 exit(eval); 338 } 339 340 static void 341 scanvars() 342 { 343 struct varent *vent; 344 VAR *v; 345 int i; 346 347 for (vent = vhead; vent; vent = vent->next) { 348 v = vent->var; 349 i = strlen(v->header); 350 if (v->width < i) 351 v->width = i; 352 totwidth += v->width + 1; /* +1 for space */ 353 if (v->flag & USER) 354 needuser = 1; 355 if (v->flag & COMM) 356 needcomm = 1; 357 } 358 totwidth--; 359 } 360 361 static char * 362 fmt(fn, ki, comm, maxlen) 363 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 364 KINFO *ki; 365 char *comm; 366 int maxlen; 367 { 368 char *s; 369 370 if ((s = 371 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 372 err(1, NULL); 373 return (s); 374 } 375 376 static void 377 saveuser(ki) 378 KINFO *ki; 379 { 380 struct pstats pstats; 381 struct usave *usp; 382 383 usp = &ki->ki_u; 384 if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats, 385 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 386 /* 387 * The u-area might be swapped out, and we can't get 388 * at it because we have a crashdump and no swap. 389 * If it's here fill in these fields, otherwise, just 390 * leave them 0. 391 */ 392 usp->u_start = pstats.p_start; 393 usp->u_ru = pstats.p_ru; 394 usp->u_cru = pstats.p_cru; 395 usp->u_valid = 1; 396 } else 397 usp->u_valid = 0; 398 /* 399 * save arguments if needed 400 */ 401 if (needcomm) 402 ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm, 403 MAXCOMLEN); 404 else 405 ki->ki_args = NULL; 406 if (needenv) 407 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 408 else 409 ki->ki_env = NULL; 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 + 2)) == NULL) 454 err(1, NULL); 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 (void)strcpy(ns, cp); /* and append the number */ 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 } 505
Indexes created Fri Sep 26 08:10:20 GMT 2025