ps.c revision 3296
11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1990, 1993, 1994 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * Redistribution and use in source and binary forms, with or without 61556Srgrimes * modification, are permitted provided that the following conditions 71556Srgrimes * are met: 81556Srgrimes * 1. Redistributions of source code must retain the above copyright 91556Srgrimes * notice, this list of conditions and the following disclaimer. 101556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111556Srgrimes * notice, this list of conditions and the following disclaimer in the 121556Srgrimes * documentation and/or other materials provided with the distribution. 131556Srgrimes * 3. All advertising materials mentioning features or use of this software 141556Srgrimes * must display the following acknowledgement: 151556Srgrimes * This product includes software developed by the University of 161556Srgrimes * California, Berkeley and its contributors. 171556Srgrimes * 4. Neither the name of the University nor the names of its contributors 181556Srgrimes * may be used to endorse or promote products derived from this software 191556Srgrimes * without specific prior written permission. 201556Srgrimes * 211556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311556Srgrimes * SUCH DAMAGE. 323044Sdg * 333296Sdg * $Id: ps.c,v 1.3 1994/10/02 08:19:13 davidg Exp $ 341556Srgrimes */ 351556Srgrimes 361556Srgrimes#ifndef lint 371556Srgrimesstatic char copyright[] = 381556Srgrimes"@(#) Copyright (c) 1990, 1993, 1994\n\ 391556Srgrimes The Regents of the University of California. All rights reserved.\n"; 401556Srgrimes#endif /* not lint */ 411556Srgrimes 421556Srgrimes#ifndef lint 431556Srgrimesstatic char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; 441556Srgrimes#endif /* not lint */ 451556Srgrimes 461556Srgrimes#include <sys/param.h> 473296Sdg#include <sys/user.h> 481556Srgrimes#include <sys/time.h> 491556Srgrimes#include <sys/resource.h> 501556Srgrimes#include <sys/proc.h> 511556Srgrimes#include <sys/stat.h> 521556Srgrimes#include <sys/ioctl.h> 531556Srgrimes#include <sys/sysctl.h> 541556Srgrimes 551556Srgrimes#include <ctype.h> 561556Srgrimes#include <err.h> 571556Srgrimes#include <errno.h> 581556Srgrimes#include <fcntl.h> 591556Srgrimes#include <kvm.h> 601556Srgrimes#include <nlist.h> 611556Srgrimes#include <paths.h> 621556Srgrimes#include <stdio.h> 631556Srgrimes#include <stdlib.h> 641556Srgrimes#include <string.h> 651556Srgrimes#include <unistd.h> 661556Srgrimes 671556Srgrimes#include "ps.h" 681556Srgrimes 691556Srgrimes#ifdef P_PPWAIT 701556Srgrimes#define NEWVM 711556Srgrimes#endif 721556Srgrimes 731556SrgrimesKINFO *kinfo; 741556Srgrimesstruct varent *vhead, *vtail; 751556Srgrimes 761556Srgrimesint eval; /* exit value */ 771556Srgrimesint rawcpu; /* -C */ 781556Srgrimesint sumrusage; /* -S */ 791556Srgrimesint termwidth; /* width of screen (0 == infinity) */ 801556Srgrimesint totwidth; /* calculated width of requested variables */ 811556Srgrimes 821556Srgrimesstatic int needuser, needcomm, needenv; 831556Srgrimes 841556Srgrimesenum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; 851556Srgrimes 861556Srgrimesstatic char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int), 871556Srgrimes KINFO *, char *, int)); 881556Srgrimesstatic char *kludge_oldps_options __P((char *)); 891556Srgrimesstatic int pscomp __P((const void *, const void *)); 901556Srgrimesstatic void saveuser __P((KINFO *)); 911556Srgrimesstatic void scanvars __P((void)); 921556Srgrimesstatic void usage __P((void)); 931556Srgrimes 941556Srgrimeschar dfmt[] = "pid tt state time command"; 951556Srgrimeschar jfmt[] = "user pid ppid pgid sess jobc state tt time command"; 961556Srgrimeschar lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; 971556Srgrimeschar o1[] = "pid"; 981556Srgrimeschar o2[] = "tt state time command"; 991556Srgrimeschar ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; 1001556Srgrimeschar vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; 1011556Srgrimes 1021556Srgrimeskvm_t *kd; 1031556Srgrimes 1041556Srgrimesint 1051556Srgrimesmain(argc, argv) 1061556Srgrimes int argc; 1071556Srgrimes char *argv[]; 1081556Srgrimes{ 1091556Srgrimes struct kinfo_proc *kp; 1101556Srgrimes struct varent *vent; 1111556Srgrimes struct winsize ws; 1121556Srgrimes dev_t ttydev; 1131556Srgrimes pid_t pid; 1141556Srgrimes uid_t uid; 1151556Srgrimes int all, ch, flag, i, fmt, lineno, nentries; 1161556Srgrimes int prtheader, wflag, what, xflg; 1171556Srgrimes char *nlistf, *memf, *swapf, errbuf[256]; 1181556Srgrimes 1191556Srgrimes if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 1201556Srgrimes ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 1211556Srgrimes ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 1221556Srgrimes ws.ws_col == 0) 1231556Srgrimes termwidth = 79; 1241556Srgrimes else 1251556Srgrimes termwidth = ws.ws_col - 1; 1261556Srgrimes 1271556Srgrimes if (argc > 1) 1281556Srgrimes argv[1] = kludge_oldps_options(argv[1]); 1291556Srgrimes 1301556Srgrimes all = fmt = prtheader = wflag = xflg = 0; 1311556Srgrimes pid = -1; 1321556Srgrimes uid = (uid_t) -1; 1331556Srgrimes ttydev = NODEV; 1341556Srgrimes memf = nlistf = swapf = NULL; 1351556Srgrimes while ((ch = getopt(argc, argv, 1361556Srgrimes "aCeghjLlM:mN:O:o:p:rSTt:uvW:wx")) != EOF) 1371556Srgrimes switch((char)ch) { 1381556Srgrimes case 'a': 1391556Srgrimes all = 1; 1401556Srgrimes break; 1411556Srgrimes case 'e': /* XXX set ufmt */ 1421556Srgrimes needenv = 1; 1431556Srgrimes break; 1441556Srgrimes case 'C': 1451556Srgrimes rawcpu = 1; 1461556Srgrimes break; 1471556Srgrimes case 'g': 1481556Srgrimes break; /* no-op */ 1491556Srgrimes case 'h': 1501556Srgrimes prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 1511556Srgrimes break; 1521556Srgrimes case 'j': 1531556Srgrimes parsefmt(jfmt); 1541556Srgrimes fmt = 1; 1551556Srgrimes jfmt[0] = '\0'; 1561556Srgrimes break; 1571556Srgrimes case 'L': 1581556Srgrimes showkey(); 1591556Srgrimes exit(0); 1601556Srgrimes case 'l': 1611556Srgrimes parsefmt(lfmt); 1621556Srgrimes fmt = 1; 1631556Srgrimes lfmt[0] = '\0'; 1641556Srgrimes break; 1651556Srgrimes case 'M': 1661556Srgrimes memf = optarg; 1671556Srgrimes break; 1681556Srgrimes case 'm': 1691556Srgrimes sortby = SORTMEM; 1701556Srgrimes break; 1711556Srgrimes case 'N': 1721556Srgrimes nlistf = optarg; 1731556Srgrimes break; 1741556Srgrimes case 'O': 1751556Srgrimes parsefmt(o1); 1761556Srgrimes parsefmt(optarg); 1771556Srgrimes parsefmt(o2); 1781556Srgrimes o1[0] = o2[0] = '\0'; 1791556Srgrimes fmt = 1; 1801556Srgrimes break; 1811556Srgrimes case 'o': 1821556Srgrimes parsefmt(optarg); 1831556Srgrimes fmt = 1; 1841556Srgrimes break; 1851556Srgrimes case 'p': 1861556Srgrimes pid = atol(optarg); 1871556Srgrimes xflg = 1; 1881556Srgrimes break; 1891556Srgrimes case 'r': 1901556Srgrimes sortby = SORTCPU; 1911556Srgrimes break; 1921556Srgrimes case 'S': 1931556Srgrimes sumrusage = 1; 1941556Srgrimes break; 1951556Srgrimes case 'T': 1961556Srgrimes if ((optarg = ttyname(STDIN_FILENO)) == NULL) 1971556Srgrimes errx(1, "stdin: not a terminal"); 1981556Srgrimes /* FALLTHROUGH */ 1991556Srgrimes case 't': { 2001556Srgrimes struct stat sb; 2011556Srgrimes char *ttypath, pathbuf[MAXPATHLEN]; 2021556Srgrimes 2031556Srgrimes if (strcmp(optarg, "co") == 0) 2041556Srgrimes ttypath = _PATH_CONSOLE; 2051556Srgrimes else if (*optarg != '/') 2061556Srgrimes (void)snprintf(ttypath = pathbuf, 2071556Srgrimes sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 2081556Srgrimes else 2091556Srgrimes ttypath = optarg; 2101556Srgrimes if (stat(ttypath, &sb) == -1) 2111556Srgrimes err(1, "%s", ttypath); 2121556Srgrimes if (!S_ISCHR(sb.st_mode)) 2131556Srgrimes errx(1, "%s: not a terminal", ttypath); 2141556Srgrimes ttydev = sb.st_rdev; 2151556Srgrimes break; 2161556Srgrimes } 2171556Srgrimes case 'u': 2181556Srgrimes parsefmt(ufmt); 2191556Srgrimes sortby = SORTCPU; 2201556Srgrimes fmt = 1; 2211556Srgrimes ufmt[0] = '\0'; 2221556Srgrimes break; 2231556Srgrimes case 'v': 2241556Srgrimes parsefmt(vfmt); 2251556Srgrimes sortby = SORTMEM; 2261556Srgrimes fmt = 1; 2271556Srgrimes vfmt[0] = '\0'; 2281556Srgrimes break; 2291556Srgrimes case 'W': 2301556Srgrimes swapf = optarg; 2311556Srgrimes break; 2321556Srgrimes case 'w': 2331556Srgrimes if (wflag) 2341556Srgrimes termwidth = UNLIMITED; 2351556Srgrimes else if (termwidth < 131) 2361556Srgrimes termwidth = 131; 2371556Srgrimes wflag++; 2381556Srgrimes break; 2391556Srgrimes case 'x': 2401556Srgrimes xflg = 1; 2411556Srgrimes break; 2421556Srgrimes case '?': 2431556Srgrimes default: 2441556Srgrimes usage(); 2451556Srgrimes } 2461556Srgrimes argc -= optind; 2471556Srgrimes argv += optind; 2481556Srgrimes 2491556Srgrimes#define BACKWARD_COMPATIBILITY 2501556Srgrimes#ifdef BACKWARD_COMPATIBILITY 2511556Srgrimes if (*argv) { 2521556Srgrimes nlistf = *argv; 2531556Srgrimes if (*++argv) { 2541556Srgrimes memf = *argv; 2551556Srgrimes if (*++argv) 2561556Srgrimes swapf = *argv; 2571556Srgrimes } 2581556Srgrimes } 2591556Srgrimes#endif 2601556Srgrimes /* 2611556Srgrimes * Discard setgid privileges if not the running kernel so that bad 2621556Srgrimes * guys can't print interesting stuff from kernel memory. 2631556Srgrimes */ 2641556Srgrimes if (nlistf != NULL || memf != NULL || swapf != NULL) 2651556Srgrimes setgid(getgid()); 2661556Srgrimes 2671556Srgrimes kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 2681556Srgrimes if (kd == 0) 2691556Srgrimes errx(1, "%s", errbuf); 2701556Srgrimes 2711556Srgrimes if (!fmt) 2721556Srgrimes parsefmt(dfmt); 2731556Srgrimes 2741556Srgrimes if (!all && ttydev == NODEV && pid == -1) /* XXX - should be cleaner */ 2751556Srgrimes uid = getuid(); 2761556Srgrimes 2771556Srgrimes /* 2781556Srgrimes * scan requested variables, noting what structures are needed, 2791556Srgrimes * and adjusting header widths as appropiate. 2801556Srgrimes */ 2811556Srgrimes scanvars(); 2821556Srgrimes /* 2831556Srgrimes * get proc list 2841556Srgrimes */ 2851556Srgrimes if (uid != (uid_t) -1) { 2861556Srgrimes what = KERN_PROC_UID; 2871556Srgrimes flag = uid; 2881556Srgrimes } else if (ttydev != NODEV) { 2891556Srgrimes what = KERN_PROC_TTY; 2901556Srgrimes flag = ttydev; 2911556Srgrimes } else if (pid != -1) { 2921556Srgrimes what = KERN_PROC_PID; 2931556Srgrimes flag = pid; 2941556Srgrimes } else { 2951556Srgrimes what = KERN_PROC_ALL; 2961556Srgrimes flag = 0; 2971556Srgrimes } 2981556Srgrimes /* 2991556Srgrimes * select procs 3001556Srgrimes */ 3011556Srgrimes if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 3021556Srgrimes errx(1, "%s", kvm_geterr(kd)); 3031556Srgrimes if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 3041556Srgrimes err(1, NULL); 3051556Srgrimes for (i = nentries; --i >= 0; ++kp) { 3061556Srgrimes kinfo[i].ki_p = kp; 3071556Srgrimes if (needuser) 3081556Srgrimes saveuser(&kinfo[i]); 3091556Srgrimes } 3101556Srgrimes /* 3111556Srgrimes * print header 3121556Srgrimes */ 3131556Srgrimes printheader(); 3141556Srgrimes if (nentries == 0) 3151556Srgrimes exit(0); 3161556Srgrimes /* 3171556Srgrimes * sort proc list 3181556Srgrimes */ 3191556Srgrimes qsort(kinfo, nentries, sizeof(KINFO), pscomp); 3201556Srgrimes /* 3211556Srgrimes * for each proc, call each variable output function. 3221556Srgrimes */ 3231556Srgrimes for (i = lineno = 0; i < nentries; i++) { 3241556Srgrimes if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 3251556Srgrimes (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 3261556Srgrimes continue; 3271556Srgrimes for (vent = vhead; vent; vent = vent->next) { 3281556Srgrimes (vent->var->oproc)(&kinfo[i], vent); 3291556Srgrimes if (vent->next != NULL) 3301556Srgrimes (void)putchar(' '); 3311556Srgrimes } 3321556Srgrimes (void)putchar('\n'); 3331556Srgrimes if (prtheader && lineno++ == prtheader - 4) { 3341556Srgrimes (void)putchar('\n'); 3351556Srgrimes printheader(); 3361556Srgrimes lineno = 0; 3371556Srgrimes } 3381556Srgrimes } 3391556Srgrimes exit(eval); 3401556Srgrimes} 3411556Srgrimes 3421556Srgrimesstatic void 3431556Srgrimesscanvars() 3441556Srgrimes{ 3451556Srgrimes struct varent *vent; 3461556Srgrimes VAR *v; 3471556Srgrimes int i; 3481556Srgrimes 3491556Srgrimes for (vent = vhead; vent; vent = vent->next) { 3501556Srgrimes v = vent->var; 3511556Srgrimes i = strlen(v->header); 3521556Srgrimes if (v->width < i) 3531556Srgrimes v->width = i; 3541556Srgrimes totwidth += v->width + 1; /* +1 for space */ 3551556Srgrimes if (v->flag & USER) 3561556Srgrimes needuser = 1; 3571556Srgrimes if (v->flag & COMM) 3581556Srgrimes needcomm = 1; 3591556Srgrimes } 3601556Srgrimes totwidth--; 3611556Srgrimes} 3621556Srgrimes 3631556Srgrimesstatic char * 3641556Srgrimesfmt(fn, ki, comm, maxlen) 3651556Srgrimes char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 3661556Srgrimes KINFO *ki; 3671556Srgrimes char *comm; 3681556Srgrimes int maxlen; 3691556Srgrimes{ 3701556Srgrimes char *s; 3711556Srgrimes 3721556Srgrimes if ((s = 3731556Srgrimes fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 3741556Srgrimes err(1, NULL); 3751556Srgrimes return (s); 3761556Srgrimes} 3771556Srgrimes 3781556Srgrimesstatic void 3791556Srgrimessaveuser(ki) 3801556Srgrimes KINFO *ki; 3811556Srgrimes{ 3821556Srgrimes struct pstats pstats; 3831556Srgrimes struct usave *usp; 3841556Srgrimes 3851556Srgrimes usp = &ki->ki_u; 3861556Srgrimes if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats, 3871556Srgrimes (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 3881556Srgrimes /* 3891556Srgrimes * The u-area might be swapped out, and we can't get 3901556Srgrimes * at it because we have a crashdump and no swap. 3911556Srgrimes * If it's here fill in these fields, otherwise, just 3921556Srgrimes * leave them 0. 3931556Srgrimes */ 3941556Srgrimes usp->u_start = pstats.p_start; 3951556Srgrimes usp->u_ru = pstats.p_ru; 3961556Srgrimes usp->u_cru = pstats.p_cru; 3971556Srgrimes usp->u_valid = 1; 3981556Srgrimes } else 3991556Srgrimes usp->u_valid = 0; 4001556Srgrimes /* 4011556Srgrimes * save arguments if needed 4021556Srgrimes */ 4031556Srgrimes if (needcomm) 4041556Srgrimes ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm, 4051556Srgrimes MAXCOMLEN); 4061556Srgrimes else 4071556Srgrimes ki->ki_args = NULL; 4081556Srgrimes if (needenv) 4091556Srgrimes ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 4101556Srgrimes else 4111556Srgrimes ki->ki_env = NULL; 4121556Srgrimes} 4131556Srgrimes 4141556Srgrimesstatic int 4151556Srgrimespscomp(a, b) 4161556Srgrimes const void *a, *b; 4171556Srgrimes{ 4181556Srgrimes int i; 4191556Srgrimes#ifdef NEWVM 4201556Srgrimes#define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 4211556Srgrimes KI_EPROC(k)->e_vm.vm_tsize) 4221556Srgrimes#else 4231556Srgrimes#define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 4241556Srgrimes#endif 4251556Srgrimes 4261556Srgrimes if (sortby == SORTCPU) 4271556Srgrimes return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 4281556Srgrimes if (sortby == SORTMEM) 4291556Srgrimes return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 4301556Srgrimes i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 4311556Srgrimes if (i == 0) 4321556Srgrimes i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 4331556Srgrimes return (i); 4341556Srgrimes} 4351556Srgrimes 4361556Srgrimes/* 4371556Srgrimes * ICK (all for getopt), would rather hide the ugliness 4381556Srgrimes * here than taint the main code. 4391556Srgrimes * 4401556Srgrimes * ps foo -> ps -foo 4411556Srgrimes * ps 34 -> ps -p34 4421556Srgrimes * 4431556Srgrimes * The old convention that 't' with no trailing tty arg means the users 4441556Srgrimes * tty, is only supported if argv[1] doesn't begin with a '-'. This same 4451556Srgrimes * feature is available with the option 'T', which takes no argument. 4461556Srgrimes */ 4471556Srgrimesstatic char * 4481556Srgrimeskludge_oldps_options(s) 4491556Srgrimes char *s; 4501556Srgrimes{ 4511556Srgrimes size_t len; 4521556Srgrimes char *newopts, *ns, *cp; 4531556Srgrimes 4541556Srgrimes len = strlen(s); 4551556Srgrimes if ((newopts = ns = malloc(len + 2)) == NULL) 4561556Srgrimes err(1, NULL); 4571556Srgrimes /* 4581556Srgrimes * options begin with '-' 4591556Srgrimes */ 4601556Srgrimes if (*s != '-') 4611556Srgrimes *ns++ = '-'; /* add option flag */ 4621556Srgrimes /* 4631556Srgrimes * gaze to end of argv[1] 4641556Srgrimes */ 4651556Srgrimes cp = s + len - 1; 4661556Srgrimes /* 4671556Srgrimes * if last letter is a 't' flag with no argument (in the context 4681556Srgrimes * of the oldps options -- option string NOT starting with a '-' -- 4691556Srgrimes * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 4701556Srgrimes */ 4711556Srgrimes if (*cp == 't' && *s != '-') 4721556Srgrimes *cp = 'T'; 4731556Srgrimes else { 4741556Srgrimes /* 4751556Srgrimes * otherwise check for trailing number, which *may* be a 4761556Srgrimes * pid. 4771556Srgrimes */ 4781556Srgrimes while (cp >= s && isdigit(*cp)) 4791556Srgrimes --cp; 4801556Srgrimes } 4811556Srgrimes cp++; 4821556Srgrimes memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 4831556Srgrimes ns += cp - s; 4841556Srgrimes /* 4851556Srgrimes * if there's a trailing number, and not a preceding 'p' (pid) or 4861556Srgrimes * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 4871556Srgrimes */ 4881556Srgrimes if (isdigit(*cp) && (cp == s || cp[-1] != 't' && cp[-1] != 'p' && 4891556Srgrimes (cp - 1 == s || cp[-2] != 't'))) 4901556Srgrimes *ns++ = 'p'; 4911556Srgrimes (void)strcpy(ns, cp); /* and append the number */ 4921556Srgrimes 4931556Srgrimes return (newopts); 4941556Srgrimes} 4951556Srgrimes 4961556Srgrimesstatic void 4971556Srgrimesusage() 4981556Srgrimes{ 4991556Srgrimes 5001556Srgrimes (void)fprintf(stderr, 5011556Srgrimes "usage:\t%s\n\t %s\n\t%s\n", 5021556Srgrimes "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]", 5031556Srgrimes "[-M core] [-N system] [-W swap]", 5041556Srgrimes "ps [-L]"); 5051556Srgrimes exit(1); 5061556Srgrimes} 507