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 * $Id: ps.c,v 1.6 1995/03/19 13:29:06 joerg Exp $ 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 static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 44 #endif /* not lint */ 45 46 #include <sys/param.h> 47 #include <sys/user.h> 48 #include <sys/time.h> 49 #include <sys/resource.h> 50 #include <sys/proc.h> 51 #include <sys/stat.h> 52 #include <sys/ioctl.h> 53 #include <sys/sysctl.h> 54 55 #include <ctype.h> 56 #include <err.h> 57 #include <errno.h> 58 #include <fcntl.h> 59 #include <kvm.h> 60 #include <nlist.h> 61 #include <paths.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 67 #include "ps.h" 68 69 #ifdef P_PPWAIT 70 #define NEWVM 71 #endif 72 73 KINFO *kinfo; 74 struct varent *vhead, *vtail; 75 76 int eval; /* exit value */ 77 int rawcpu; /* -C */ 78 int sumrusage; /* -S */ 79 int termwidth; /* width of screen (0 == infinity) */ 80 int totwidth; /* calculated width of requested variables */ 81 82 static int needuser, needcomm, needenv; 83 84 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 85 86 static char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int), 87 KINFO *, char *, int)); 88 static char *kludge_oldps_options __P((char *)); 89 static int pscomp __P((const void *, const void *)); 90 static void saveuser __P((KINFO *)); 91 static void scanvars __P((void)); 92 static void usage __P((void)); 93 94 char dfmt[] = "pid tt state time command"; 95 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 96 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 97 char o1[] = "pid"; 98 char o2[] = "tt state time command"; 99 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 100 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 101 102 kvm_t *kd; 103 104 int 105 main(argc, argv) 106 int argc; 107 char *argv[]; 108 { 109 struct kinfo_proc *kp; 110 struct varent *vent; 111 struct winsize ws; 112 dev_t ttydev; 113 pid_t pid; 114 uid_t uid; 115 int all, ch, flag, i, fmt, lineno, nentries; 116 int prtheader, wflag, what, xflg; 117 char *nlistf, *memf, *swapf, errbuf[256]; 118 119 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 120 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 121 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 122 ws.ws_col == 0) 123 termwidth = 79; 124 else 125 termwidth = ws.ws_col - 1; 126 127 if (argc > 1) 128 argv[1] = kludge_oldps_options(argv[1]); 129 130 all = fmt = prtheader = wflag = xflg = 0; 131 pid = -1; 132 uid = (uid_t) -1; 133 ttydev = NODEV; 134 memf = nlistf = swapf = NULL; 135 while ((ch = getopt(argc, argv, 136 "aCeghjLlM:mN:O:o:p:rSTt:uvW:wx")) != EOF) 137 switch((char)ch) { 138 case 'a': 139 all = 1; 140 break; 141 case 'e': /* XXX set ufmt */ 142 needenv = 1; 143 break; 144 case 'C': 145 rawcpu = 1; 146 break; 147 case 'g': 148 break; /* no-op */ 149 case 'h': 150 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 151 break; 152 case 'j': 153 parsefmt(jfmt); 154 fmt = 1; 155 jfmt[0] = '\0'; 156 break; 157 case 'L': 158 showkey(); 159 exit(0); 160 case 'l': 161 parsefmt(lfmt); 162 fmt = 1; 163 lfmt[0] = '\0'; 164 break; 165 case 'M': 166 memf = optarg; 167 break; 168 case 'm': 169 sortby = SORTMEM; 170 break; 171 case 'N': 172 nlistf = optarg; 173 break; 174 case 'O': 175 parsefmt(o1); 176 parsefmt(optarg); 177 parsefmt(o2); 178 o1[0] = o2[0] = '\0'; 179 fmt = 1; 180 break; 181 case 'o': 182 parsefmt(optarg); 183 fmt = 1; 184 break; 185 case 'p': 186 pid = atol(optarg); 187 xflg = 1; 188 break; 189 case 'r': 190 sortby = SORTCPU; 191 break; 192 case 'S': 193 sumrusage = 1; 194 break; 195 case 'T': 196 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 197 errx(1, "stdin: not a terminal"); 198 /* FALLTHROUGH */ 199 case 't': { 200 struct stat sb; 201 char *ttypath, pathbuf[MAXPATHLEN]; 202 203 if (strcmp(optarg, "co") == 0) 204 ttypath = _PATH_CONSOLE; 205 else if (*optarg != '/') 206 (void)snprintf(ttypath = pathbuf, 207 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 208 else 209 ttypath = optarg; 210 if (stat(ttypath, &sb) == -1) 211 err(1, "%s", ttypath); 212 if (!S_ISCHR(sb.st_mode)) 213 errx(1, "%s: not a terminal", ttypath); 214 ttydev = sb.st_rdev; 215 break; 216 } 217 case 'u': 218 parsefmt(ufmt); 219 sortby = SORTCPU; 220 fmt = 1; 221 ufmt[0] = '\0'; 222 break; 223 case 'v': 224 parsefmt(vfmt); 225 sortby = SORTMEM; 226 fmt = 1; 227 vfmt[0] = '\0'; 228 break; 229 case 'W': 230 swapf = optarg; 231 break; 232 case 'w': 233 if (wflag) 234 termwidth = UNLIMITED; 235 else if (termwidth < 131) 236 termwidth = 131; 237 wflag++; 238 break; 239 case 'x': 240 xflg = 1; 241 break; 242 case '?': 243 default: 244 usage(); 245 } 246 argc -= optind; 247 argv += optind; 248 249 #define BACKWARD_COMPATIBILITY 250 #ifdef BACKWARD_COMPATIBILITY 251 if (*argv) { 252 nlistf = *argv; 253 if (*++argv) { 254 memf = *argv; 255 if (*++argv) 256 swapf = *argv; 257 } 258 } 259 #endif 260 /* 261 * Discard setgid privileges if not the running kernel so that bad 262 * guys can't print interesting stuff from kernel memory. 263 */ 264 if (nlistf != NULL || memf != NULL || swapf != NULL) 265 setgid(getgid()); 266 267 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 268 if (kd == 0) 269 errx(1, "%s", errbuf); 270 271 if (!fmt) 272 parsefmt(dfmt); 273 274 if (!all && ttydev == NODEV && pid == -1) /* XXX - should be cleaner */ 275 uid = getuid(); 276 277 /* 278 * scan requested variables, noting what structures are needed, 279 * and adjusting header widths as appropiate. 280 */ 281 scanvars(); 282 /* 283 * get proc list 284 */ 285 if (uid != (uid_t) -1) { 286 what = KERN_PROC_UID; 287 flag = uid; 288 } else if (ttydev != NODEV) { 289 what = KERN_PROC_TTY; 290 flag = ttydev; 291 } else if (pid != -1) { 292 what = KERN_PROC_PID; 293 flag = pid; 294 } else { 295 what = KERN_PROC_ALL; 296 flag = 0; 297 } 298 /* 299 * select procs 300 */ 301 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 302 errx(1, "%s", kvm_geterr(kd)); 303 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 304 err(1, NULL); 305 for (i = nentries; --i >= 0; ++kp) { 306 kinfo[i].ki_p = kp; 307 if (needuser) 308 saveuser(&kinfo[i]); 309 } 310 /* 311 * print header 312 */ 313 printheader(); 314 if (nentries == 0) 315 exit(0); 316 /* 317 * sort proc list 318 */ 319 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 320 /* 321 * for each proc, call each variable output function. 322 */ 323 for (i = lineno = 0; i < nentries; i++) { 324 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 325 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 326 continue; 327 for (vent = vhead; vent; vent = vent->next) { 328 (vent->var->oproc)(&kinfo[i], vent); 329 if (vent->next != NULL) 330 (void)putchar(' '); 331 } 332 (void)putchar('\n'); 333 if (prtheader && lineno++ == prtheader - 4) { 334 (void)putchar('\n'); 335 printheader(); 336 lineno = 0; 337 } 338 } 339 exit(eval); 340 } 341 342 static void 343 scanvars() 344 { 345 struct varent *vent; 346 VAR *v; 347 int i; 348 349 for (vent = vhead; vent; vent = vent->next) { 350 v = vent->var; 351 i = strlen(v->header); 352 if (v->width < i) 353 v->width = i; 354 totwidth += v->width + 1; /* +1 for space */ 355 if (v->flag & USER) 356 needuser = 1; 357 if (v->flag & COMM) 358 needcomm = 1; 359 } 360 totwidth--; 361 } 362 363 static char * 364 fmt(fn, ki, comm, maxlen) 365 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 366 KINFO *ki; 367 char *comm; 368 int maxlen; 369 { 370 char *s; 371 372 if ((s = 373 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 374 err(1, NULL); 375 return (s); 376 } 377 378 static void 379 saveuser(ki) 380 KINFO *ki; 381 { 382 struct pstats pstats; 383 struct usave *usp; 384 struct user *u_addr = (struct user *)USRSTACK; 385 386 usp = &ki->ki_u; 387 if (kvm_uread(kd, KI_PROC(ki), (unsigned long)&u_addr->u_stats, 388 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 389 /* 390 * The u-area might be swapped out, and we can't get 391 * at it because we have a crashdump and no swap. 392 * If it's here fill in these fields, otherwise, just 393 * leave them 0. 394 */ 395 usp->u_start = pstats.p_start; 396 usp->u_ru = pstats.p_ru; 397 usp->u_cru = pstats.p_cru; 398 usp->u_valid = 1; 399 } else 400 usp->u_valid = 0; 401 /* 402 * save arguments if needed 403 */ 404 if (needcomm) 405 ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm, 406 MAXCOMLEN); 407 else 408 ki->ki_args = NULL; 409 if (needenv) 410 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 411 else 412 ki->ki_env = NULL; 413 } 414 415 static int 416 pscomp(a, b) 417 const void *a, *b; 418 { 419 int i; 420 #ifdef NEWVM 421 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 422 KI_EPROC(k)->e_vm.vm_tsize) 423 #else 424 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 425 #endif 426 427 if (sortby == SORTCPU) 428 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 429 if (sortby == SORTMEM) 430 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 431 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 432 if (i == 0) 433 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->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 users 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 + 2)) == 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] != 't' && cp[-1] != 'p')) && 491 (cp - 1 == s || cp[-2] != 't')) 492 *ns++ = 'p'; 493 (void)strcpy(ns, cp); /* and append the number */ 494 495 return (newopts); 496 } 497 498 static void 499 usage() 500 { 501 502 (void)fprintf(stderr, 503 "usage:\t%s\n\t %s\n\t%s\n", 504 "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]", 505 "[-M core] [-N system] [-W swap]", 506 "ps [-L]"); 507 exit(1); 508 } 509