69fe77ce99
indeterminate in such a case. The correct value for 2nd argument is sizeof(buf). Do not NUL-terminate the result string, strftime() will do it for us.
525 lines
14 KiB
C
525 lines
14 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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
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#ifndef lint
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static const char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94";
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#endif
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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 <arpa/nameser.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 <langinfo.h>
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#include <libutil.h>
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#include <limits.h>
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#include <locale.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 <resolv.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 <timeconv.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 "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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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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int use_ampm; /* use AM/PM time */
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int use_comma; /* use comma as floats separator */
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char **sel_users; /* login array of particular users selected */
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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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/* W_DISPHOSTSIZE should not be greater than UT_HOSTSIZE */
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#define W_DISPHOSTSIZE 16
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static void pr_header(time_t *, int);
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static struct stat *ttystat(char *, int);
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static void usage(int);
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static int this_is_uptime(const char *s);
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char *fmt_argv(char **, char *, int); /* ../../bin/ps/fmt.c */
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int
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main(int argc, 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 stat *stp;
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FILE *ut;
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time_t touched;
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int ch, i, nentries, nusers, wcmd, longidle, dropgid;
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const char *memf, *nlistf, *p;
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char *x_suffix;
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char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX];
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char fn[MAXHOSTNAMELEN];
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char *dot;
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(void)setlocale(LC_ALL, "");
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use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0');
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use_comma = (*nl_langinfo(RADIXCHAR) != ',');
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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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touched = stp->st_atime;
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if (touched < ep->utmp.ut_time) {
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/* tty untouched since before login */
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touched = ep->utmp.ut_time;
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}
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if ((ep->idle = now - touched) < 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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(void)kvm_close(kd);
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exit(0);
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}
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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 + W_DISPHOSTSIZE + \
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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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W_DISPHOSTSIZE, W_DISPHOSTSIZE, 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 = strdup("-");
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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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for (ep = ehead; ep != NULL; ep = ep->next) {
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char host_buf[UT_HOSTSIZE + 1];
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struct sockaddr_storage ss;
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struct sockaddr *sa = (struct sockaddr *)&ss;
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struct sockaddr_in *lsin = (struct sockaddr_in *)&ss;
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struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss;
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time_t t;
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int isaddr;
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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_suffix = strrchr(p, ':')) != NULL) {
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if ((dot = strchr(x_suffix, '.')) != NULL &&
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strchr(dot+1, '.') == NULL)
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*x_suffix++ = '\0';
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else
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x_suffix = NULL;
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}
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if (!nflag) {
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/* Attempt to change an IP address into a name */
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isaddr = 0;
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memset(&ss, '\0', sizeof(ss));
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if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) {
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lsin6->sin6_len = sizeof(*lsin6);
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lsin6->sin6_family = AF_INET6;
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isaddr = 1;
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} else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) {
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lsin->sin_len = sizeof(*lsin);
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lsin->sin_family = AF_INET;
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isaddr = 1;
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}
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if (isaddr && realhostname_sa(fn, sizeof(fn), sa,
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sa->sa_len) == HOSTNAME_FOUND)
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p = fn;
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}
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if (x_suffix) {
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(void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix);
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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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const 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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W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-");
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t = _time_to_time32(ep->utmp.ut_time);
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pr_attime(&t, &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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(void)kvm_close(kd);
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exit(0);
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}
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static void
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pr_header(time_t *nowp, 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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if (strftime(buf, sizeof(buf),
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use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 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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if (uptime > 60)
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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 < (int)(sizeof(avenrun) / sizeof(avenrun[0])); i++) {
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if (use_comma && i > 0)
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(void)printf(",");
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(void)printf(" %.2f", avenrun[i]);
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}
|
|
(void)printf("\n");
|
|
}
|
|
}
|
|
|
|
static struct stat *
|
|
ttystat(char *line, int sz)
|
|
{
|
|
static struct stat sb;
|
|
char ttybuf[MAXPATHLEN];
|
|
|
|
(void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line);
|
|
if (stat(ttybuf, &sb) == 0) {
|
|
return (&sb);
|
|
} else
|
|
return (NULL);
|
|
}
|
|
|
|
static void
|
|
usage(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(const char *s)
|
|
{
|
|
const char *u;
|
|
|
|
if ((u = strrchr(s, '/')) != NULL)
|
|
++u;
|
|
else
|
|
u = s;
|
|
if (strcmp(u, "uptime") == 0)
|
|
return (0);
|
|
return (-1);
|
|
}
|