ps.c revision 1.16
1 /* $NetBSD: ps.c,v 1.16 1996/09/27 02:59:53 thorpej 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 1.16 1996/09/27 02:59:53 thorpej 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 <nlist.h> 65 #include <paths.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <unistd.h> 70 71 #include "ps.h" 72 73 #ifdef P_PPWAIT 74 #define NEWVM 75 #endif 76 77 KINFO *kinfo; 78 struct varent *vhead, *vtail; 79 80 int eval; /* exit value */ 81 int rawcpu; /* -C */ 82 int sumrusage; /* -S */ 83 int termwidth; /* width of screen (0 == infinity) */ 84 int totwidth; /* calculated width of requested variables */ 85 86 int needuser, needcomm, needenv, commandonly; 87 88 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 89 90 static char *kludge_oldps_options __P((char *)); 91 static int pscomp __P((const void *, const void *)); 92 static void saveuser __P((KINFO *)); 93 static void scanvars __P((void)); 94 static void usage __P((void)); 95 96 char dfmt[] = "pid tt state time command"; 97 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 98 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 99 char o1[] = "pid"; 100 char o2[] = "tt state time command"; 101 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 102 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 103 104 kvm_t *kd; 105 106 int 107 main(argc, argv) 108 int argc; 109 char *argv[]; 110 { 111 struct kinfo_proc *kp; 112 struct varent *vent; 113 struct winsize ws; 114 dev_t ttydev; 115 pid_t pid; 116 uid_t uid; 117 int all, ch, flag, i, fmt, lineno, nentries; 118 int prtheader, wflag, what, xflg; 119 char *nlistf, *memf, *swapf, errbuf[256]; 120 121 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 122 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 123 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 124 ws.ws_col == 0) 125 termwidth = 79; 126 else 127 termwidth = ws.ws_col - 1; 128 129 if (argc > 1) 130 argv[1] = kludge_oldps_options(argv[1]); 131 132 all = fmt = prtheader = wflag = xflg = 0; 133 pid = -1; 134 uid = (uid_t) -1; 135 ttydev = NODEV; 136 memf = nlistf = swapf = NULL; 137 while ((ch = getopt(argc, argv, 138 "acCeghjLlM:mN:O:o:p:rSTt:uvW:wx")) != EOF) 139 switch((char)ch) { 140 case 'a': 141 all = 1; 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 'L': 163 showkey(); 164 exit(0); 165 case 'l': 166 parsefmt(lfmt); 167 fmt = 1; 168 lfmt[0] = '\0'; 169 break; 170 case 'M': 171 memf = optarg; 172 break; 173 case 'm': 174 sortby = SORTMEM; 175 break; 176 case 'N': 177 nlistf = optarg; 178 break; 179 case 'O': 180 parsefmt(o1); 181 parsefmt(optarg); 182 parsefmt(o2); 183 o1[0] = o2[0] = '\0'; 184 fmt = 1; 185 break; 186 case 'o': 187 parsefmt(optarg); 188 fmt = 1; 189 break; 190 case 'p': 191 pid = atol(optarg); 192 xflg = 1; 193 break; 194 case 'r': 195 sortby = SORTCPU; 196 break; 197 case 'S': 198 sumrusage = 1; 199 break; 200 case 'T': 201 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 202 errx(1, "stdin: not a terminal"); 203 /* FALLTHROUGH */ 204 case 't': { 205 struct stat sb; 206 char *ttypath, pathbuf[MAXPATHLEN]; 207 208 if (strcmp(optarg, "co") == 0) 209 ttypath = _PATH_CONSOLE; 210 else if (*optarg != '/') 211 (void)snprintf(ttypath = pathbuf, 212 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 213 else 214 ttypath = optarg; 215 if (stat(ttypath, &sb) == -1) 216 err(1, "%s", ttypath); 217 if (!S_ISCHR(sb.st_mode)) 218 errx(1, "%s: not a terminal", ttypath); 219 ttydev = sb.st_rdev; 220 break; 221 } 222 case 'u': 223 parsefmt(ufmt); 224 sortby = SORTCPU; 225 fmt = 1; 226 ufmt[0] = '\0'; 227 break; 228 case 'v': 229 parsefmt(vfmt); 230 sortby = SORTMEM; 231 fmt = 1; 232 vfmt[0] = '\0'; 233 break; 234 case 'W': 235 swapf = optarg; 236 break; 237 case 'w': 238 if (wflag) 239 termwidth = UNLIMITED; 240 else if (termwidth < 131) 241 termwidth = 131; 242 wflag++; 243 break; 244 case 'x': 245 xflg = 1; 246 break; 247 case '?': 248 default: 249 usage(); 250 } 251 argc -= optind; 252 argv += optind; 253 254 #define BACKWARD_COMPATIBILITY 255 #ifdef BACKWARD_COMPATIBILITY 256 if (*argv) { 257 nlistf = *argv; 258 if (*++argv) { 259 memf = *argv; 260 if (*++argv) 261 swapf = *argv; 262 } 263 } 264 #endif 265 /* 266 * Discard setgid privileges if not the running kernel so that bad 267 * guys can't print interesting stuff from kernel memory. 268 */ 269 if (nlistf != NULL || memf != NULL || swapf != NULL) 270 setgid(getgid()); 271 272 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 273 if (kd == 0) 274 errx(1, "%s", errbuf); 275 276 if (!fmt) 277 parsefmt(dfmt); 278 279 if (!all && ttydev == NODEV && pid == -1) /* XXX - should be cleaner */ 280 uid = getuid(); 281 282 /* 283 * scan requested variables, noting what structures are needed, 284 * and adjusting header widths as appropiate. 285 */ 286 scanvars(); 287 /* 288 * get proc list 289 */ 290 if (uid != (uid_t) -1) { 291 what = KERN_PROC_UID; 292 flag = uid; 293 } else if (ttydev != NODEV) { 294 what = KERN_PROC_TTY; 295 flag = ttydev; 296 } else if (pid != -1) { 297 what = KERN_PROC_PID; 298 flag = pid; 299 } else { 300 what = KERN_PROC_ALL; 301 flag = 0; 302 } 303 /* 304 * select procs 305 */ 306 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 307 errx(1, "%s", kvm_geterr(kd)); 308 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 309 err(1, NULL); 310 for (i = nentries; --i >= 0; ++kp) { 311 kinfo[i].ki_p = kp; 312 if (needuser) 313 saveuser(&kinfo[i]); 314 } 315 /* 316 * print header 317 */ 318 printheader(); 319 if (nentries == 0) 320 exit(0); 321 /* 322 * sort proc list 323 */ 324 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 325 /* 326 * for each proc, call each variable output function. 327 */ 328 for (i = lineno = 0; i < nentries; i++) { 329 KINFO *ki = &kinfo[i]; 330 331 if (xflg == 0 && (KI_EPROC(ki)->e_tdev == NODEV || 332 (KI_PROC(ki)->p_flag & P_CONTROLT ) == 0)) 333 continue; 334 for (vent = vhead; vent; vent = vent->next) { 335 (vent->var->oproc)(ki, vent); 336 if (vent->next != NULL) 337 (void)putchar(' '); 338 } 339 (void)putchar('\n'); 340 if (prtheader && lineno++ == prtheader - 4) { 341 (void)putchar('\n'); 342 printheader(); 343 lineno = 0; 344 } 345 } 346 exit(eval); 347 } 348 349 static void 350 scanvars() 351 { 352 struct varent *vent; 353 VAR *v; 354 int i; 355 356 for (vent = vhead; vent; vent = vent->next) { 357 v = vent->var; 358 i = strlen(v->header); 359 if (v->width < i) 360 v->width = i; 361 totwidth += v->width + 1; /* +1 for space */ 362 if (v->flag & USER) 363 needuser = 1; 364 if (v->flag & COMM) 365 needcomm = 1; 366 } 367 totwidth--; 368 } 369 370 static void 371 saveuser(ki) 372 KINFO *ki; 373 { 374 struct pstats pstats; 375 struct usave *usp; 376 377 usp = &ki->ki_u; 378 if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats, 379 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 380 /* 381 * The u-area might be swapped out, and we can't get 382 * at it because we have a crashdump and no swap. 383 * If it's here fill in these fields, otherwise, just 384 * leave them 0. 385 */ 386 usp->u_start = pstats.p_start; 387 usp->u_ru = pstats.p_ru; 388 usp->u_cru = pstats.p_cru; 389 usp->u_valid = 1; 390 } else 391 usp->u_valid = 0; 392 } 393 394 static int 395 pscomp(a, b) 396 const void *a, *b; 397 { 398 int i; 399 #ifdef NEWVM 400 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 401 KI_EPROC(k)->e_vm.vm_tsize) 402 #else 403 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 404 #endif 405 406 if (sortby == SORTCPU) 407 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 408 if (sortby == SORTMEM) 409 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 410 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 411 if (i == 0) 412 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 413 return (i); 414 } 415 416 /* 417 * ICK (all for getopt), would rather hide the ugliness 418 * here than taint the main code. 419 * 420 * ps foo -> ps -foo 421 * ps 34 -> ps -p34 422 * 423 * The old convention that 't' with no trailing tty arg means the users 424 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 425 * feature is available with the option 'T', which takes no argument. 426 */ 427 static char * 428 kludge_oldps_options(s) 429 char *s; 430 { 431 size_t len; 432 char *newopts, *ns, *cp; 433 434 len = strlen(s); 435 if ((newopts = ns = malloc(len + 3)) == NULL) 436 err(1, NULL); 437 /* 438 * options begin with '-' 439 */ 440 if (*s != '-') 441 *ns++ = '-'; /* add option flag */ 442 /* 443 * gaze to end of argv[1] 444 */ 445 cp = s + len - 1; 446 /* 447 * if last letter is a 't' flag with no argument (in the context 448 * of the oldps options -- option string NOT starting with a '-' -- 449 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 450 */ 451 if (*cp == 't' && *s != '-') 452 *cp = 'T'; 453 else { 454 /* 455 * otherwise check for trailing number, which *may* be a 456 * pid. 457 */ 458 while (cp >= s && isdigit(*cp)) 459 --cp; 460 } 461 cp++; 462 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 463 ns += cp - s; 464 /* 465 * if there's a trailing number, and not a preceding 'p' (pid) or 466 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 467 */ 468 if (isdigit(*cp) && (cp == s || cp[-1] != 't' && cp[-1] != 'p' && 469 (cp - 1 == s || cp[-2] != 't'))) 470 *ns++ = 'p'; 471 (void)strcpy(ns, cp); /* and append the number */ 472 473 return (newopts); 474 } 475 476 static void 477 usage() 478 { 479 480 (void)fprintf(stderr, 481 "usage:\t%s\n\t %s\n\t%s\n", 482 "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]", 483 "[-M core] [-N system] [-W swap]", 484 "ps [-L]"); 485 exit(1); 486 } 487
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