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 const 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 #if 0 42 static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/user.h> 50 #include <sys/time.h> 51 #include <sys/resource.h> 52 #include <sys/stat.h> 53 #include <sys/ioctl.h> 54 #include <sys/sysctl.h> 55 56 #include <ctype.h> 57 #include <err.h> 58 #include <errno.h> 59 #include <fcntl.h> 60 #include <kvm.h> 61 #include <limits.h> 62 #include <nlist.h> 63 #include <paths.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 #include <locale.h> 69 #include <pwd.h> 70 71 #include "ps.h" 72 73 KINFO *kinfo; 74 struct varent *vhead, *vtail; 75 76 int eval; /* exit value */ 77 int cflag; /* -c */ 78 int rawcpu; /* -C */ 79 int sumrusage; /* -S */ 80 int termwidth; /* width of screen (0 == infinity) */ 81 int totwidth; /* calculated width of requested variables */ 82 83 static int needuser, needcomm, needenv; 84 #if defined(LAZY_PS) 85 static int forceuread=0; 86 #else 87 static int forceuread=1; 88 #endif 89 90 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 91 92 static char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int), 93 KINFO *, char *, int)); 94 static char *kludge_oldps_options __P((char *)); 95 static int pscomp __P((const void *, const void *)); 96 static void saveuser __P((KINFO *)); 97 static void scanvars __P((void)); 98 static void dynsizevars __P((KINFO *)); 99 static void sizevars __P((void)); 100 static void usage __P((void)); 101 #ifdef __alpha__ 102 static int get_uarea __P((struct proc *, struct pstats *)); 103 #endif 104 105 char dfmt[] = "pid tt state time command"; 106 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 107 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 108 char o1[] = "pid"; 109 char o2[] = "tt state time command"; 110 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 111 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 112 113 kvm_t *kd; 114 115 int 116 main(argc, argv) 117 int argc; 118 char *argv[]; 119 { 120 struct kinfo_proc *kp; 121 struct varent *vent; 122 struct winsize ws; 123 struct passwd *pwd; 124 dev_t ttydev; 125 pid_t pid; 126 uid_t uid; 127 int all, ch, flag, i, fmt, lineno, nentries, dropgid; 128 int prtheader, wflag, what, xflg; 129 char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX]; 130 131 (void) setlocale(LC_ALL, ""); 132 133 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 134 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 135 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 136 ws.ws_col == 0) 137 termwidth = 79; 138 else 139 termwidth = ws.ws_col - 1; 140 141 if (argc > 1) 142 argv[1] = kludge_oldps_options(argv[1]); 143 144 all = fmt = prtheader = wflag = xflg = 0; 145 pid = -1; 146 uid = (uid_t) -1; 147 ttydev = NODEV; 148 dropgid = 0; 149 memf = nlistf = swapf = _PATH_DEVNULL; 150 while ((ch = getopt(argc, argv, 151 #if defined(LAZY_PS) 152 "aCcefghjLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1) 153 #else 154 "aCceghjLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1) 155 #endif 156 switch((char)ch) { 157 case 'a': 158 all = 1; 159 break; 160 case 'C': 161 rawcpu = 1; 162 break; 163 case 'c': 164 cflag = 1; 165 break; 166 case 'e': /* XXX set ufmt */ 167 needenv = 1; 168 break; 169 case 'g': 170 break; /* no-op */ 171 case 'h': 172 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 173 break; 174 case 'j': 175 parsefmt(jfmt); 176 fmt = 1; 177 jfmt[0] = '\0'; 178 break; 179 case 'L': 180 showkey(); 181 exit(0); 182 case 'l': 183 parsefmt(lfmt); 184 fmt = 1; 185 lfmt[0] = '\0'; 186 break; 187 case 'M': 188 memf = optarg; 189 dropgid = 1; 190 break; 191 case 'm': 192 sortby = SORTMEM; 193 break; 194 case 'N': 195 nlistf = optarg; 196 dropgid = 1; 197 break; 198 case 'O': 199 parsefmt(o1); 200 parsefmt(optarg); 201 parsefmt(o2); 202 o1[0] = o2[0] = '\0'; 203 fmt = 1; 204 break; 205 case 'o': 206 parsefmt(optarg); 207 fmt = 1; 208 break; 209 #if defined(LAZY_PS) 210 case 'f': 211 if (getuid() == 0 || getgid() == 0) 212 forceuread = 1; 213 break; 214 #endif 215 case 'p': 216 pid = atol(optarg); 217 xflg = 1; 218 break; 219 case 'r': 220 sortby = SORTCPU; 221 break; 222 case 'S': 223 sumrusage = 1; 224 break; 225 case 'T': 226 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 227 errx(1, "stdin: not a terminal"); 228 /* FALLTHROUGH */ 229 case 't': { 230 struct stat sb; 231 char *ttypath, pathbuf[MAXPATHLEN]; 232 233 if (strcmp(optarg, "co") == 0) 234 ttypath = _PATH_CONSOLE; 235 else if (*optarg != '/') 236 (void)snprintf(ttypath = pathbuf, 237 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 238 else 239 ttypath = optarg; 240 if (stat(ttypath, &sb) == -1) 241 err(1, "%s", ttypath); 242 if (!S_ISCHR(sb.st_mode)) 243 errx(1, "%s: not a terminal", ttypath); 244 ttydev = sb.st_rdev; 245 break; 246 } 247 case 'U': 248 pwd = getpwnam(optarg); 249 if (pwd == NULL) 250 errx(1, "%s: no such user", optarg); 251 uid = pwd->pw_uid; 252 endpwent(); 253 xflg++; /* XXX: intuitive? */ 254 break; 255 case 'u': 256 parsefmt(ufmt); 257 sortby = SORTCPU; 258 fmt = 1; 259 ufmt[0] = '\0'; 260 break; 261 case 'v': 262 parsefmt(vfmt); 263 sortby = SORTMEM; 264 fmt = 1; 265 vfmt[0] = '\0'; 266 break; 267 case 'W': 268 swapf = optarg; 269 dropgid = 1; 270 break; 271 case 'w': 272 if (wflag) 273 termwidth = UNLIMITED; 274 else if (termwidth < 131) 275 termwidth = 131; 276 wflag++; 277 break; 278 case 'x': 279 xflg = 1; 280 break; 281 case '?': 282 default: 283 usage(); 284 } 285 argc -= optind; 286 argv += optind; 287 288 #define BACKWARD_COMPATIBILITY 289 #ifdef BACKWARD_COMPATIBILITY 290 if (*argv) { 291 nlistf = *argv; 292 if (*++argv) { 293 memf = *argv; 294 if (*++argv) 295 swapf = *argv; 296 } 297 } 298 #endif 299 /* 300 * Discard setgid privileges if not the running kernel so that bad 301 * guys can't print interesting stuff from kernel memory. 302 */ 303 if (dropgid) { 304 setgid(getgid()); 305 setuid(getuid()); 306 } 307 308 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 309 if (kd == 0) 310 errx(1, "%s", errbuf); 311 312 if (!fmt) 313 parsefmt(dfmt); 314 315 /* XXX - should be cleaner */ 316 if (!all && ttydev == NODEV && pid == -1 && uid == (uid_t)-1) 317 uid = getuid(); 318 319 /* 320 * scan requested variables, noting what structures are needed, 321 * and adjusting header widths as appropiate. 322 */ 323 scanvars(); 324 /* 325 * get proc list 326 */ 327 if (uid != (uid_t) -1) { 328 what = KERN_PROC_UID; 329 flag = uid; 330 } else if (ttydev != NODEV) { 331 what = KERN_PROC_TTY; 332 flag = ttydev; 333 } else if (pid != -1) { 334 what = KERN_PROC_PID; 335 flag = pid; 336 } else { 337 what = KERN_PROC_ALL; 338 flag = 0; 339 } 340 /* 341 * select procs 342 */ 343 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 344 errx(1, "%s", kvm_geterr(kd)); 345 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 346 err(1, NULL); 347 for (i = nentries; --i >= 0; ++kp) { 348 kinfo[i].ki_p = kp; 349 if (needuser) 350 saveuser(&kinfo[i]); 351 dynsizevars(&kinfo[i]); 352 } 353 354 sizevars(); 355 356 /* 357 * print header 358 */ 359 printheader(); 360 if (nentries == 0) 361 exit(0); 362 /* 363 * sort proc list 364 */ 365 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 366 /* 367 * for each proc, call each variable output function. 368 */ 369 for (i = lineno = 0; i < nentries; i++) { 370 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 371 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 372 continue; 373 for (vent = vhead; vent; vent = vent->next) { 374 (vent->var->oproc)(&kinfo[i], vent); 375 if (vent->next != NULL) 376 (void)putchar(' '); 377 } 378 (void)putchar('\n'); 379 if (prtheader && lineno++ == prtheader - 4) { 380 (void)putchar('\n'); 381 printheader(); 382 lineno = 0; 383 } 384 } 385 exit(eval); 386 } 387 388 static void 389 scanvars() 390 { 391 struct varent *vent; 392 VAR *v; 393 394 for (vent = vhead; vent; vent = vent->next) { 395 v = vent->var; 396 if (v->flag & DSIZ) { 397 v->dwidth = v->width; 398 v->width = 0; 399 } 400 if (v->flag & USER) 401 needuser = 1; 402 if (v->flag & COMM) 403 needcomm = 1; 404 } 405 } 406 407 static void 408 dynsizevars(ki) 409 KINFO *ki; 410 { 411 struct varent *vent; 412 VAR *v; 413 int i; 414 415 for (vent = vhead; vent; vent = vent->next) { 416 v = vent->var; 417 if (!(v->flag & DSIZ)) 418 continue; 419 i = (v->sproc)( ki); 420 if (v->width < i) 421 v->width = i; 422 if (v->width > v->dwidth) 423 v->width = v->dwidth; 424 } 425 } 426 427 static void 428 sizevars() 429 { 430 struct varent *vent; 431 VAR *v; 432 int i; 433 434 for (vent = vhead; vent; vent = vent->next) { 435 v = vent->var; 436 i = strlen(v->header); 437 if (v->width < i) 438 v->width = i; 439 totwidth += v->width + 1; /* +1 for space */ 440 } 441 totwidth--; 442 } 443 444 static char * 445 fmt(fn, ki, comm, maxlen) 446 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 447 KINFO *ki; 448 char *comm; 449 int maxlen; 450 { 451 char *s; 452 453 if ((s = 454 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 455 err(1, NULL); 456 return (s); 457 } 458 459 #ifdef __alpha__ 460 /* 461 * This is a kludge to work around the fact that on the alpha, 462 * the uarea is not mapped into the process address space. 463 */ 464 static int get_uarea(p, pstats) 465 struct proc *p; 466 struct pstats *pstats; 467 { 468 size_t offset; 469 static struct user ubuf; 470 kvm_t *mkd; 471 int len; 472 473 offset = (size_t)p->p_addr; 474 mkd = kvm_open(NULL, NULL, NULL, 0, NULL); 475 if (mkd == NULL) 476 return(0); 477 len = kvm_read(mkd, offset, (char *)&ubuf, sizeof(struct user)); 478 kvm_close(mkd); 479 if (len != sizeof(struct user)) 480 return(0); 481 482 bcopy((char *)&ubuf.u_stats, (char *)pstats, sizeof(struct pstats)); 483 484 return(sizeof(struct pstats)); 485 } 486 #endif 487 488 #define UREADOK(ki) (forceuread || (KI_PROC(ki)->p_flag & P_INMEM)) 489 490 static void 491 saveuser(ki) 492 KINFO *ki; 493 { 494 struct pstats pstats; 495 struct usave *usp; 496 #ifndef __alpha__ 497 struct user *u_addr = (struct user *)USRSTACK; 498 #endif 499 500 usp = &ki->ki_u; 501 502 #ifdef __alpha__ 503 if (UREADOK(ki) && get_uarea(KI_PROC(ki), &pstats) == sizeof(pstats)) { 504 #else 505 if (UREADOK(ki) && kvm_uread(kd, KI_PROC(ki), (unsigned long)&u_addr->u_stats, 506 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 507 #endif 508 /* 509 * The u-area might be swapped out, and we can't get 510 * at it because we have a crashdump and no swap. 511 * If it's here fill in these fields, otherwise, just 512 * leave them 0. 513 */ 514 usp->u_start = pstats.p_start; 515 usp->u_ru = pstats.p_ru; 516 usp->u_cru = pstats.p_cru; 517 usp->u_valid = 1; 518 } else 519 usp->u_valid = 0; 520 /* 521 * save arguments if needed 522 */ 523 if (needcomm && UREADOK(ki)) { 524 ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm, 525 MAXCOMLEN); 526 } else if (needcomm) { 527 ki->ki_args = malloc(strlen(KI_PROC(ki)->p_comm) + 3); 528 sprintf(ki->ki_args, "(%s)", KI_PROC(ki)->p_comm); 529 } else { 530 ki->ki_args = NULL; 531 } 532 if (needenv && UREADOK(ki)) { 533 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 534 } else if (needenv) { 535 ki->ki_env = malloc(3); 536 strcpy(ki->ki_env, "()"); 537 } else { 538 ki->ki_env = NULL; 539 } 540 } 541 542 static int 543 pscomp(a, b) 544 const void *a, *b; 545 { 546 int i; 547 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 548 KI_EPROC(k)->e_vm.vm_tsize) 549 550 if (sortby == SORTCPU) 551 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 552 if (sortby == SORTMEM) 553 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 554 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 555 if (i == 0) 556 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 557 return (i); 558 } 559 560 /* 561 * ICK (all for getopt), would rather hide the ugliness 562 * here than taint the main code. 563 * 564 * ps foo -> ps -foo 565 * ps 34 -> ps -p34 566 * 567 * The old convention that 't' with no trailing tty arg means the users 568 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 569 * feature is available with the option 'T', which takes no argument. 570 */ 571 static char * 572 kludge_oldps_options(s) 573 char *s; 574 { 575 size_t len; 576 char *newopts, *ns, *cp; 577 578 len = strlen(s); 579 if ((newopts = ns = malloc(len + 2)) == NULL) 580 err(1, NULL); 581 /* 582 * options begin with '-' 583 */ 584 if (*s != '-') 585 *ns++ = '-'; /* add option flag */ 586 /* 587 * gaze to end of argv[1] 588 */ 589 cp = s + len - 1; 590 /* 591 * if last letter is a 't' flag with no argument (in the context 592 * of the oldps options -- option string NOT starting with a '-' -- 593 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 594 */ 595 if (*cp == 't' && *s != '-') 596 *cp = 'T'; 597 else { 598 /* 599 * otherwise check for trailing number, which *may* be a 600 * pid. 601 */ 602 while (cp >= s && isdigit(*cp)) 603 --cp; 604 } 605 cp++; 606 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 607 ns += cp - s; 608 /* 609 * if there's a trailing number, and not a preceding 'p' (pid) or 610 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 611 */ 612 if (isdigit(*cp) && 613 (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) && 614 (cp - 1 == s || cp[-2] != 't')) 615 *ns++ = 'p'; 616 (void)strcpy(ns, cp); /* and append the number */ 617 618 return (newopts); 619 } 620 621 static void 622 usage() 623 { 624 625 (void)fprintf(stderr, "%s\n%s\n%s\n", 626 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]", 627 " [-M core] [-N system] [-W swap]", 628 " ps [-L]"); 629 exit(1); 630 } 631