ps.c revision 1.57
1 /* $NetBSD: ps.c,v 1.57 2005/02/11 18:26:18 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Simon Burge. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1990, 1993, 1994 41 * The Regents of the University of California. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 68 #include <sys/cdefs.h> 69 #ifndef lint 70 __COPYRIGHT("@(#) Copyright (c) 1990, 1993, 1994\n\ 71 The Regents of the University of California. All rights reserved.\n"); 72 #endif /* not lint */ 73 74 #ifndef lint 75 #if 0 76 static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 77 #else 78 __RCSID("$NetBSD: ps.c,v 1.57 2005/02/11 18:26:18 christos Exp $"); 79 #endif 80 #endif /* not lint */ 81 82 #include <sys/param.h> 83 #include <sys/user.h> 84 #include <sys/time.h> 85 #include <sys/resource.h> 86 #include <sys/lwp.h> 87 #include <sys/proc.h> 88 #include <sys/stat.h> 89 #include <sys/ioctl.h> 90 #include <sys/sysctl.h> 91 92 #include <stddef.h> 93 #include <ctype.h> 94 #include <err.h> 95 #include <errno.h> 96 #include <fcntl.h> 97 #include <kvm.h> 98 #include <limits.h> 99 #include <nlist.h> 100 #include <paths.h> 101 #include <pwd.h> 102 #include <stdio.h> 103 #include <stdlib.h> 104 #include <string.h> 105 #include <unistd.h> 106 107 #include "ps.h" 108 109 /* 110 * ARGOPTS must contain all option characters that take arguments 111 * (except for 't'!) - it is used in kludge_oldps_options() 112 */ 113 #define GETOPTSTR "acCeghjk:LlM:mN:O:o:p:rSsTt:U:uvW:wx" 114 #define ARGOPTS "kMNOopUW" 115 116 struct kinfo_proc2 *kinfo; 117 struct varent *vhead, *sorthead; 118 119 int eval; /* exit value */ 120 int rawcpu; /* -C */ 121 int sumrusage; /* -S */ 122 int termwidth; /* width of screen (0 == infinity) */ 123 int totwidth; /* calculated width of requested variables */ 124 125 int needcomm, needenv, commandonly; 126 uid_t myuid; 127 128 static struct kinfo_lwp 129 *pick_representative_lwp(struct kinfo_proc2 *, 130 struct kinfo_lwp *, int); 131 static struct kinfo_proc2 132 *getkinfo_kvm(kvm_t *, int, int, int *); 133 static char *kludge_oldps_options(char *); 134 static int pscomp(const void *, const void *); 135 static void scanvars(void); 136 static void usage(void); 137 int main(int, char *[]); 138 139 char dfmt[] = "pid tt state time command"; 140 char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 141 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 142 char o1[] = "pid"; 143 char o2[] = "tt state time command"; 144 char sfmt[] = "uid pid ppid cpu lid nlwp pri nice vsz rss wchan lstate tt " 145 "time command"; 146 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 147 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 148 149 kvm_t *kd; 150 151 int 152 main(int argc, char *argv[]) 153 { 154 struct varent *vent; 155 struct winsize ws; 156 struct kinfo_lwp *kl, *l; 157 int ch, flag, i, j, fmt, lineno, nentries, nlwps; 158 int prtheader, wflag, what, xflg, mode, showlwps; 159 char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX]; 160 char *ttname; 161 162 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 163 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 164 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 165 ws.ws_col == 0) 166 termwidth = 79; 167 else 168 termwidth = ws.ws_col - 1; 169 170 if (argc > 1) 171 argv[1] = kludge_oldps_options(argv[1]); 172 173 fmt = prtheader = wflag = xflg = showlwps = 0; 174 what = KERN_PROC_UID; 175 flag = myuid = getuid(); 176 memf = nlistf = swapf = NULL; 177 mode = PRINTMODE; 178 while ((ch = getopt(argc, argv, GETOPTSTR)) != -1) 179 switch((char)ch) { 180 case 'a': 181 what = KERN_PROC_ALL; 182 flag = 0; 183 break; 184 case 'c': 185 commandonly = 1; 186 break; 187 case 'e': /* XXX set ufmt */ 188 needenv = 1; 189 break; 190 case 'C': 191 rawcpu = 1; 192 break; 193 case 'g': 194 break; /* no-op */ 195 case 'h': 196 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 197 break; 198 case 'j': 199 parsefmt(jfmt); 200 fmt = 1; 201 jfmt[0] = '\0'; 202 break; 203 case 'k': 204 parsesort(optarg); 205 break; 206 case 'K': 207 break; /* no-op - was dontuseprocfs */ 208 case 'L': 209 showkey(); 210 exit(0); 211 /* NOTREACHED */ 212 case 'l': 213 parsefmt(lfmt); 214 fmt = 1; 215 lfmt[0] = '\0'; 216 break; 217 case 'M': 218 memf = optarg; 219 break; 220 case 'm': 221 parsesort("vsz"); 222 break; 223 case 'N': 224 nlistf = optarg; 225 break; 226 case 'O': 227 parsefmt(o1); 228 parsefmt(optarg); 229 parsefmt(o2); 230 o1[0] = o2[0] = '\0'; 231 fmt = 1; 232 break; 233 case 'o': 234 parsefmt(optarg); 235 fmt = 1; 236 break; 237 case 'p': 238 what = KERN_PROC_PID; 239 flag = atol(optarg); 240 xflg = 1; 241 break; 242 case 'r': 243 parsesort("%cpu"); 244 break; 245 case 'S': 246 sumrusage = 1; 247 break; 248 case 's': 249 /* -L was already taken... */ 250 showlwps = 1; 251 parsefmt(sfmt); 252 fmt = 1; 253 sfmt[0] = '\0'; 254 break; 255 case 'T': 256 if ((ttname = ttyname(STDIN_FILENO)) == NULL) 257 errx(1, "stdin: not a terminal"); 258 goto tty; 259 case 't': 260 ttname = optarg; 261 tty: { 262 struct stat sb; 263 char *ttypath, pathbuf[MAXPATHLEN]; 264 265 flag = 0; 266 if (strcmp(ttname, "?") == 0) 267 flag = KERN_PROC_TTY_NODEV; 268 else if (strcmp(ttname, "-") == 0) 269 flag = KERN_PROC_TTY_REVOKE; 270 else if (strcmp(ttname, "co") == 0) 271 ttypath = _PATH_CONSOLE; 272 else if (strncmp(ttname, "pts/", 4) == 0 || 273 strncmp(ttname, "tty", 3) == 0) 274 (void)snprintf(ttypath = pathbuf, 275 sizeof(pathbuf), "%s%s", _PATH_DEV, ttname); 276 else if (*ttname != '/') 277 (void)snprintf(ttypath = pathbuf, 278 sizeof(pathbuf), "%s%s", _PATH_TTY, ttname); 279 else 280 ttypath = ttname; 281 what = KERN_PROC_TTY; 282 if (flag == 0) { 283 if (stat(ttypath, &sb) == -1) 284 err(1, "%s", ttypath); 285 if (!S_ISCHR(sb.st_mode)) 286 errx(1, "%s: not a terminal", ttypath); 287 flag = sb.st_rdev; 288 } 289 break; 290 } 291 case 'U': 292 if (*optarg != '\0') { 293 struct passwd *pw; 294 char *ep; 295 296 what = KERN_PROC_UID; 297 pw = getpwnam(optarg); 298 if (pw == NULL) { 299 errno = 0; 300 flag = strtoul(optarg, &ep, 10); 301 if (errno) 302 err(1, "%s", optarg); 303 if (*ep != '\0') 304 errx(1, "%s: illegal user name", 305 optarg); 306 } else 307 flag = pw->pw_uid; 308 } 309 break; 310 case 'u': 311 parsefmt(ufmt); 312 parsesort("%cpu"); 313 fmt = 1; 314 ufmt[0] = '\0'; 315 break; 316 case 'v': 317 parsefmt(vfmt); 318 parsesort("vsz"); 319 fmt = 1; 320 vfmt[0] = '\0'; 321 break; 322 case 'W': 323 swapf = optarg; 324 break; 325 case 'w': 326 if (wflag) 327 termwidth = UNLIMITED; 328 else if (termwidth < 131) 329 termwidth = 131; 330 wflag++; 331 break; 332 case 'x': 333 xflg = 1; 334 break; 335 case '?': 336 default: 337 usage(); 338 } 339 argc -= optind; 340 argv += optind; 341 342 #define BACKWARD_COMPATIBILITY 343 #ifdef BACKWARD_COMPATIBILITY 344 if (*argv) { 345 nlistf = *argv; 346 if (*++argv) { 347 memf = *argv; 348 if (*++argv) 349 swapf = *argv; 350 } 351 } 352 #endif 353 354 if (memf == NULL) { 355 kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, errbuf); 356 donlist_sysctl(); 357 } else 358 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 359 360 if (kd == 0) 361 errx(1, "%s", errbuf); 362 363 if (!fmt) 364 parsefmt(dfmt); 365 366 /* Add default sort criteria */ 367 parsesort("tdev,pid"); 368 for (vent = sorthead; vent; vent = vent->next) { 369 if (vent->var->flag & LWP || vent->var->type == UNSPECIFIED) 370 warnx("Cannot sort on %s, sort key ignored\n", 371 vent->var->name); 372 } 373 374 /* 375 * scan requested variables, noting what structures are needed. 376 */ 377 scanvars(); 378 379 /* 380 * select procs 381 */ 382 if (!(kinfo = getkinfo_kvm(kd, what, flag, &nentries))) 383 err(1, "%s", kvm_geterr(kd)); 384 if (nentries == 0) { 385 printheader(); 386 exit(1); 387 } 388 /* 389 * sort proc list 390 */ 391 qsort(kinfo, nentries, sizeof(struct kinfo_proc2), pscomp); 392 /* 393 * For each proc, call each variable output function in 394 * "setwidth" mode to determine the widest element of 395 * the column. 396 */ 397 if (mode == PRINTMODE) 398 for (i = 0; i < nentries; i++) { 399 struct kinfo_proc2 *ki = &kinfo[i]; 400 401 if (xflg == 0 && (ki->p_tdev == NODEV || 402 (ki->p_flag & P_CONTROLT) == 0)) 403 continue; 404 405 kl = kvm_getlwps(kd, ki->p_pid, ki->p_paddr, 406 sizeof(struct kinfo_lwp), &nlwps); 407 if (kl == 0) 408 nlwps = 0; 409 if (showlwps == 0) { 410 l = pick_representative_lwp(ki, kl, nlwps); 411 for (vent = vhead; vent; vent = vent->next) 412 OUTPUT(vent, ki, l, WIDTHMODE); 413 } else { 414 /* The printing is done with the loops 415 * reversed, but here we don't need that, 416 * and this improves the code locality a bit. 417 */ 418 for (vent = vhead; vent; vent = vent->next) 419 for (j = 0; j < nlwps; j++) 420 OUTPUT(vent, ki, &kl[j], 421 WIDTHMODE); 422 } 423 } 424 /* 425 * Print header - AFTER determining process field widths. 426 * printheader() also adds up the total width of all 427 * fields the first time it's called. 428 */ 429 printheader(); 430 /* 431 * For each proc, call each variable output function in 432 * print mode. 433 */ 434 for (i = lineno = 0; i < nentries; i++) { 435 struct kinfo_proc2 *ki = &kinfo[i]; 436 437 if (xflg == 0 && (ki->p_tdev == NODEV || 438 (ki->p_flag & P_CONTROLT ) == 0)) 439 continue; 440 kl = kvm_getlwps(kd, ki->p_pid, (u_long)ki->p_paddr, 441 sizeof(struct kinfo_lwp), &nlwps); 442 if (kl == 0) 443 nlwps = 0; 444 if (showlwps == 0) { 445 l = pick_representative_lwp(ki, kl, nlwps); 446 for (vent = vhead; vent; vent = vent->next) { 447 OUTPUT(vent, ki, l, mode); 448 if (vent->next != NULL) 449 (void)putchar(' '); 450 } 451 (void)putchar('\n'); 452 if (prtheader && lineno++ == prtheader - 4) { 453 (void)putchar('\n'); 454 printheader(); 455 lineno = 0; 456 } 457 } else { 458 for (j = 0; j < nlwps; j++) { 459 for (vent = vhead; vent; vent = vent->next) { 460 OUTPUT(vent, ki, &kl[j], mode); 461 if (vent->next != NULL) 462 (void)putchar(' '); 463 } 464 (void)putchar('\n'); 465 if (prtheader && lineno++ == prtheader - 4) { 466 (void)putchar('\n'); 467 printheader(); 468 lineno = 0; 469 } 470 } 471 } 472 } 473 exit(eval); 474 /* NOTREACHED */ 475 } 476 477 static struct kinfo_lwp * 478 pick_representative_lwp(struct kinfo_proc2 *ki, struct kinfo_lwp *kl, int nlwps) 479 { 480 int i, onproc, running, sleeping, stopped, suspended; 481 static struct kinfo_lwp zero_lwp; 482 483 if (kl == 0) 484 return &zero_lwp; 485 486 /* Trivial case: only one LWP */ 487 if (nlwps == 1) 488 return kl; 489 490 switch (ki->p_realstat) { 491 case SSTOP: 492 case SACTIVE: 493 /* Pick the most live LWP */ 494 onproc = running = sleeping = stopped = suspended = -1; 495 for (i = 0; i < nlwps; i++) { 496 switch (kl[i].l_stat) { 497 case LSONPROC: 498 onproc = i; 499 break; 500 case LSRUN: 501 running = i; 502 break; 503 case LSSLEEP: 504 sleeping = i; 505 break; 506 case LSSTOP: 507 stopped = i; 508 break; 509 case LSSUSPENDED: 510 suspended = i; 511 break; 512 } 513 } 514 if (onproc != -1) 515 return &kl[onproc]; 516 if (running != -1) 517 return &kl[running]; 518 if (sleeping != -1) 519 return &kl[sleeping]; 520 if (stopped != -1) 521 return &kl[stopped]; 522 if (suspended != -1) 523 return &kl[suspended]; 524 break; 525 case SZOMB: 526 /* First will do */ 527 return kl; 528 break; 529 } 530 /* Error condition! */ 531 warnx("Inconsistent LWP state for process %d\n", ki->p_pid); 532 return kl; 533 } 534 535 536 static struct kinfo_proc2 * 537 getkinfo_kvm(kvm_t *kdp, int what, int flag, int *nentriesp) 538 { 539 540 return (kvm_getproc2(kdp, what, flag, sizeof(struct kinfo_proc2), 541 nentriesp)); 542 } 543 544 static void 545 scanvars(void) 546 { 547 struct varent *vent; 548 VAR *v; 549 550 for (vent = vhead; vent; vent = vent->next) { 551 v = vent->var; 552 if (v->flag & COMM) { 553 needcomm = 1; 554 break; 555 } 556 } 557 } 558 559 static int 560 pscomp(const void *a, const void *b) 561 { 562 struct kinfo_proc2 *ka = (struct kinfo_proc2 *)a; 563 struct kinfo_proc2 *kb = (struct kinfo_proc2 *)b; 564 565 int i; 566 int64_t i64; 567 VAR *v; 568 struct varent *ve; 569 sigset_t *sa, *sb; 570 571 #define V_SIZE(k) (k->p_vm_dsize + k->p_vm_ssize + k->p_vm_tsize) 572 #define RDIFF_N(t, n) \ 573 if (((t *)((char *)ka + v->off))[n] > ((t *)((char *)kb + v->off))[n]) \ 574 return 1; \ 575 if (((t *)((char *)ka + v->off))[n] < ((t *)((char *)kb + v->off))[n]) \ 576 return -1; 577 578 #define RDIFF(type) RDIFF_N(type, 0); continue 579 580 for (ve = sorthead; ve != NULL; ve = ve->next) { 581 v = ve->var; 582 if (v->flag & LWP) 583 /* LWP structure not available (yet) */ 584 continue; 585 /* Sort on pvar() fields, + a few others */ 586 switch (v->type) { 587 case CHAR: 588 RDIFF(char); 589 case UCHAR: 590 RDIFF(u_char); 591 case SHORT: 592 RDIFF(short); 593 case USHORT: 594 RDIFF(ushort); 595 case INT: 596 RDIFF(int); 597 case UINT: 598 RDIFF(uint); 599 case LONG: 600 RDIFF(long); 601 case ULONG: 602 RDIFF(ulong); 603 case INT32: 604 RDIFF(int32_t); 605 case UINT32: 606 RDIFF(uint32_t); 607 case SIGLIST: 608 sa = (void *)((char *)a + v->off); 609 sb = (void *)((char *)b + v->off); 610 i = 0; 611 do { 612 if (sa->__bits[i] > sb->__bits[i]) 613 return 1; 614 if (sa->__bits[i] < sb->__bits[i]) 615 return -1; 616 i++; 617 } while (i < sizeof sa->__bits / sizeof sa->__bits[0]); 618 continue; 619 case INT64: 620 RDIFF(int64_t); 621 case KPTR: 622 case KPTR24: 623 case UINT64: 624 RDIFF(uint64_t); 625 case TIMEVAL: 626 /* compare xxx_sec then xxx_usec */ 627 RDIFF_N(uint32_t, 0); 628 RDIFF_N(uint32_t, 1); 629 continue; 630 case CPUTIME: 631 i64 = ka->p_rtime_sec * 1000000 + ka->p_rtime_usec; 632 i64 -= kb->p_rtime_sec * 1000000 + kb->p_rtime_usec; 633 if (sumrusage) { 634 i64 += ka->p_uctime_sec * 1000000 635 + ka->p_uctime_usec; 636 i64 -= kb->p_uctime_sec * 1000000 637 + kb->p_uctime_usec; 638 } 639 if (i64 != 0) 640 return i64 > 0 ? 1 : -1; 641 continue; 642 case PCPU: 643 i = getpcpu(kb) - getpcpu(ka); 644 if (i != 0) 645 return i; 646 continue; 647 case VSIZE: 648 i = V_SIZE(kb) - V_SIZE(ka); 649 if (i != 0) 650 return i; 651 continue; 652 653 default: 654 /* Ignore everything else */ 655 break; 656 } 657 } 658 return 0; 659 660 #undef VSIZE 661 } 662 663 /* 664 * ICK (all for getopt), would rather hide the ugliness 665 * here than taint the main code. 666 * 667 * ps foo -> ps -foo 668 * ps 34 -> ps -p34 669 * 670 * The old convention that 't' with no trailing tty arg means the user's 671 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 672 * feature is available with the option 'T', which takes no argument. 673 */ 674 static char * 675 kludge_oldps_options(char *s) 676 { 677 size_t len; 678 char *newopts, *ns, *cp; 679 680 len = strlen(s); 681 if ((newopts = ns = malloc(len + 3)) == NULL) 682 err(1, NULL); 683 /* 684 * options begin with '-' 685 */ 686 if (*s != '-') 687 *ns++ = '-'; /* add option flag */ 688 /* 689 * gaze to end of argv[1] 690 */ 691 cp = s + len - 1; 692 /* 693 * if the last letter is a 't' flag and there are no other option 694 * characters that take arguments (eg U, p, o) in the option 695 * string and the option string doesn't start with a '-' then 696 * convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 697 */ 698 if (*cp == 't' && *s != '-' && strpbrk(s, ARGOPTS) == NULL) 699 *cp = 'T'; 700 else { 701 /* 702 * otherwise check for trailing number, which *may* be a 703 * pid. 704 */ 705 while (cp >= s && isdigit((unsigned char)*cp)) 706 --cp; 707 } 708 cp++; 709 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 710 ns += cp - s; 711 /* 712 * if there's a trailing number, and not a preceding 'p' (pid) or 713 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 714 */ 715 if (isdigit((unsigned char)*cp) && 716 (cp == s || (cp[-1] != 'U' && cp[-1] != 't' && cp[-1] != 'p' && 717 cp[-1] != '/' && (cp - 1 == s || cp[-2] != 't')))) 718 *ns++ = 'p'; 719 /* and append the number */ 720 (void)strcpy(ns, cp); /* XXX strcpy is safe here */ 721 722 return (newopts); 723 } 724 725 static void 726 usage(void) 727 { 728 729 (void)fprintf(stderr, 730 "usage:\t%s\n\t %s\n\t%s\n", 731 "ps [-acCehjlmrsSTuvwx] [-k key] [-O|o fmt] [-p pid] [-t tty]", 732 "[-M core] [-N system] [-W swap] [-U username]", 733 "ps [-L]"); 734 exit(1); 735 /* NOTREACHED */ 736 } 737
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