1f7d250182
no longer contains kernel specific data structures, but rather only scalar values and structures that are already part of the kernel/user interface, specifically rusage and rtprio. It no longer contains proc, session, pcred, ucred, procsig, vmspace, pstats, mtx, sigiolst, klist, callout, pasleep, or mdproc. If any of these changed in size, ps, w, fstat, gcore, systat, and top would all stop working. The new structure has over 200 bytes of unassigned space for future values to be added, yet is nearly 100 bytes smaller per entry than the structure that it replaced.
516 lines
13 KiB
C
516 lines
13 KiB
C
/*-
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* Copyright (c) 1980, 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/*
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* w - print system status (who and what)
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*
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* This program is similar to the systat command on Tenex/Tops 10/20
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*
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*/
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/tty.h>
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#include <machine/cpu.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <kvm.h>
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#include <netdb.h>
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#include <nlist.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <utmp.h>
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#include <vis.h>
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#include <locale.h>
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#include <arpa/nameser.h>
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#include <resolv.h>
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#include "extern.h"
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struct timeval boottime;
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struct utmp utmp;
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struct winsize ws;
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kvm_t *kd;
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time_t now; /* the current time of day */
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time_t uptime; /* time of last reboot & elapsed time since */
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int ttywidth; /* width of tty */
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int argwidth; /* width of tty */
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int header = 1; /* true if -h flag: don't print heading */
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int nflag; /* true if -n flag: don't convert addrs */
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int dflag; /* true if -d flag: output debug info */
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int sortidle; /* sort by idle time */
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char **sel_users; /* login array of particular users selected */
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char domain[MAXHOSTNAMELEN];
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/*
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* One of these per active utmp entry.
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*/
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struct entry {
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struct entry *next;
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struct utmp utmp;
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dev_t tdev; /* dev_t of terminal */
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time_t idle; /* idle time of terminal in seconds */
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struct kinfo_proc *kp; /* `most interesting' proc */
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char *args; /* arg list of interesting process */
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struct kinfo_proc *dkp; /* debug option proc list */
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} *ep, *ehead = NULL, **nextp = &ehead;
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#define debugproc(p) *((struct kinfo_proc **)&(p)->ki_spare[0])
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static void pr_header __P((time_t *, int));
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static struct stat *ttystat __P((char *, int));
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static void usage __P((int));
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static int this_is_uptime __P((const char *s));
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char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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struct kinfo_proc *kp;
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struct kinfo_proc *dkp;
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struct hostent *hp;
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struct stat *stp;
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FILE *ut;
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u_long l;
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int ch, i, nentries, nusers, wcmd, longidle, dropgid;
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char *memf, *nlistf, *p, *x;
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char buf[MAXHOSTNAMELEN], errbuf[256];
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(void)setlocale(LC_ALL, "");
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/* Are we w(1) or uptime(1)? */
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if (this_is_uptime(argv[0]) == 0) {
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wcmd = 0;
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p = "";
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} else {
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wcmd = 1;
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p = "dhiflM:N:nsuw";
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}
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dropgid = 0;
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memf = nlistf = _PATH_DEVNULL;
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while ((ch = getopt(argc, argv, p)) != -1)
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switch (ch) {
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case 'd':
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dflag = 1;
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break;
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case 'h':
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header = 0;
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break;
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case 'i':
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sortidle = 1;
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break;
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case 'M':
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header = 0;
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memf = optarg;
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dropgid = 1;
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break;
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case 'N':
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nlistf = optarg;
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dropgid = 1;
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break;
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case 'n':
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nflag = 1;
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break;
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case 'f': case 'l': case 's': case 'u': case 'w':
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warnx("[-flsuw] no longer supported");
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/* FALLTHROUGH */
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case '?':
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default:
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usage(wcmd);
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}
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argc -= optind;
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argv += optind;
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if (!(_res.options & RES_INIT))
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res_init();
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_res.retrans = 2; /* resolver timeout to 2 seconds per try */
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_res.retry = 1; /* only try once.. */
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/*
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* Discard setgid privileges if not the running kernel so that bad
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* guys can't print interesting stuff from kernel memory.
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*/
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if (dropgid)
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setgid(getgid());
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if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
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errx(1, "%s", errbuf);
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(void)time(&now);
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if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
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err(1, "%s", _PATH_UTMP);
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if (*argv)
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sel_users = argv;
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for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
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if (utmp.ut_name[0] == '\0')
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continue;
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if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE)))
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continue; /* corrupted record */
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++nusers;
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if (wcmd == 0)
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continue;
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if (sel_users) {
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int usermatch;
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char **user;
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usermatch = 0;
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for (user = sel_users; !usermatch && *user; user++)
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if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE))
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usermatch = 1;
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if (!usermatch)
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continue;
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}
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if ((ep = calloc(1, sizeof(struct entry))) == NULL)
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errx(1, "calloc");
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*nextp = ep;
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nextp = &ep->next;
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memmove(&ep->utmp, &utmp, sizeof(struct utmp));
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ep->tdev = stp->st_rdev;
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#ifdef CPU_CONSDEV
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/*
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* If this is the console device, attempt to ascertain
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* the true console device dev_t.
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*/
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if (ep->tdev == 0) {
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int mib[2];
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size_t size;
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mib[0] = CTL_MACHDEP;
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mib[1] = CPU_CONSDEV;
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size = sizeof(dev_t);
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(void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
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}
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#endif
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if ((ep->idle = now - stp->st_atime) < 0)
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ep->idle = 0;
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}
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(void)fclose(ut);
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if (header || wcmd == 0) {
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pr_header(&now, nusers);
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if (wcmd == 0)
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exit(0);
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#define HEADER_USER "USER"
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#define HEADER_TTY "TTY"
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#define HEADER_FROM "FROM"
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#define HEADER_LOGIN_IDLE "LOGIN@ IDLE "
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#define HEADER_WHAT "WHAT\n"
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#define WUSED (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \
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sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */
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(void)printf("%-*.*s %-*.*s %-*.*s %s",
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UT_NAMESIZE, UT_NAMESIZE, HEADER_USER,
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UT_LINESIZE, UT_LINESIZE, HEADER_TTY,
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UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM,
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HEADER_LOGIN_IDLE HEADER_WHAT);
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}
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if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
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err(1, "%s", kvm_geterr(kd));
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for (i = 0; i < nentries; i++, kp++) {
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if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB)
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continue;
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for (ep = ehead; ep != NULL; ep = ep->next) {
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if (ep->tdev == kp->ki_tdev) {
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/*
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* proc is associated with this terminal
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*/
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if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) {
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/*
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* Proc is 'most interesting'
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*/
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if (proc_compare(ep->kp, kp))
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ep->kp = kp;
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}
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/*
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* Proc debug option info; add to debug
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* list using kinfo_proc ki_spare[0]
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* as next pointer; ptr to ptr avoids the
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* ptr = long assumption.
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*/
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dkp = ep->dkp;
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ep->dkp = kp;
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debugproc(kp) = dkp;
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}
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}
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}
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if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
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ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
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ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
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ttywidth = 79;
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else
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ttywidth = ws.ws_col - 1;
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argwidth = ttywidth - WUSED;
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if (argwidth < 4)
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argwidth = 8;
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for (ep = ehead; ep != NULL; ep = ep->next) {
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if (ep->kp == NULL) {
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ep->args = "-";
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continue;
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}
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ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth),
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ep->kp->ki_comm, MAXCOMLEN);
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if (ep->args == NULL)
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err(1, NULL);
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}
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/* sort by idle time */
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if (sortidle && ehead != NULL) {
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struct entry *from, *save;
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from = ehead;
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ehead = NULL;
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while (from != NULL) {
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for (nextp = &ehead;
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(*nextp) && from->idle >= (*nextp)->idle;
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nextp = &(*nextp)->next)
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continue;
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save = from;
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from = from->next;
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save->next = *nextp;
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*nextp = save;
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}
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}
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if (!nflag) {
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if (gethostname(domain, sizeof(domain) - 1) < 0 ||
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(p = strchr(domain, '.')) == NULL)
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domain[0] = '\0';
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else {
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domain[sizeof(domain) - 1] = '\0';
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memmove(domain, p, strlen(p) + 1);
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}
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}
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for (ep = ehead; ep != NULL; ep = ep->next) {
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char host_buf[UT_HOSTSIZE + 1];
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host_buf[UT_HOSTSIZE] = '\0';
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strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE);
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p = *host_buf ? host_buf : "-";
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if ((x = strchr(p, ':')) != NULL)
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*x++ = '\0';
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if (!nflag && isdigit(*p) && (l = inet_addr(p)) != -1 &&
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(hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) {
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if (domain[0] != '\0') {
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p = hp->h_name;
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p += strlen(hp->h_name);
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p -= strlen(domain);
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if (p > hp->h_name && strcmp(p, domain) == 0)
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*p = '\0';
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}
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p = hp->h_name;
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}
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if (nflag && *p && strcmp(p, "-") &&
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inet_addr(p) == INADDR_NONE) {
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hp = gethostbyname(p);
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if (hp != NULL) {
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struct in_addr in;
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memmove(&in, hp->h_addr, sizeof(in));
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p = inet_ntoa(in);
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}
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}
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if (x) {
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(void)snprintf(buf, sizeof(buf), "%s:%s", p, x);
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p = buf;
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}
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if (dflag) {
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for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) {
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char *ptr;
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ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth),
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dkp->ki_comm, MAXCOMLEN);
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if (ptr == NULL)
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ptr = "-";
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(void)printf("\t\t%-9d %s\n",
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dkp->ki_pid, ptr);
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}
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}
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(void)printf("%-*.*s %-*.*s %-*.*s ",
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UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name,
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UT_LINESIZE, UT_LINESIZE,
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strncmp(ep->utmp.ut_line, "tty", 3) &&
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strncmp(ep->utmp.ut_line, "cua", 3) ?
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ep->utmp.ut_line : ep->utmp.ut_line + 3,
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UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-");
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pr_attime(&ep->utmp.ut_time, &now);
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longidle = pr_idle(ep->idle);
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(void)printf("%.*s\n", argwidth - longidle, ep->args);
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}
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exit(0);
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}
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static void
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pr_header(nowp, nusers)
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time_t *nowp;
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int nusers;
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{
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double avenrun[3];
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time_t uptime;
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int days, hrs, i, mins, secs;
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int mib[2];
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size_t size;
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char buf[256];
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/*
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* Print time of day.
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*/
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(void)strftime(buf, sizeof(buf) - 1, "%l:%M%p", localtime(nowp));
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buf[sizeof(buf) - 1] = '\0';
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(void)printf("%s ", buf);
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/*
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* Print how long system has been up.
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* (Found by looking getting "boottime" from the kernel)
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*/
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mib[0] = CTL_KERN;
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mib[1] = KERN_BOOTTIME;
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size = sizeof(boottime);
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if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
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boottime.tv_sec != 0) {
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uptime = now - boottime.tv_sec;
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uptime += 30;
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days = uptime / 86400;
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uptime %= 86400;
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hrs = uptime / 3600;
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uptime %= 3600;
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mins = uptime / 60;
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secs = uptime % 60;
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(void)printf(" up");
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if (days > 0)
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(void)printf(" %d day%s,", days, days > 1 ? "s" : "");
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if (hrs > 0 && mins > 0)
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(void)printf(" %2d:%02d,", hrs, mins);
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else if (hrs > 0)
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(void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : "");
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else if (mins > 0)
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(void)printf(" %d min%s,", mins, mins > 1 ? "s" : "");
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else
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(void)printf(" %d sec%s,", secs, secs > 1 ? "s" : "");
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}
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/* Print number of users logged in to system */
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(void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s");
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/*
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* Print 1, 5, and 15 minute load averages.
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*/
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if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
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(void)printf(", no load average information available\n");
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else {
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(void)printf(", load averages:");
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for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++)
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(void)printf("%s %.2f", i > 0 ? "," : "", avenrun[i]);
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(void)printf("\n");
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}
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}
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static struct stat *
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ttystat(line, sz)
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char *line;
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int sz;
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{
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static struct stat sb;
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char ttybuf[MAXPATHLEN];
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(void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line);
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if (stat(ttybuf, &sb)) {
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warn("%s", ttybuf);
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return (NULL);
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}
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return (&sb);
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}
|
|
|
|
static void
|
|
usage(wcmd)
|
|
int wcmd;
|
|
{
|
|
if (wcmd)
|
|
(void)fprintf(stderr,
|
|
"usage: w [-dhin] [-M core] [-N system] [user ...]\n");
|
|
else
|
|
(void)fprintf(stderr, "usage: uptime\n");
|
|
exit(1);
|
|
}
|
|
|
|
static int
|
|
this_is_uptime(s)
|
|
const char *s;
|
|
{
|
|
const char *u;
|
|
|
|
if ((u = strrchr(s, '/')) != NULL)
|
|
++u;
|
|
else
|
|
u = s;
|
|
if (strcmp(u, "uptime") == 0)
|
|
return (0);
|
|
return (-1);
|
|
}
|