504 lines
12 KiB
C
504 lines
12 KiB
C
/* $NetBSD: w.c,v 1.47 2001/11/05 03:35:49 enami Exp $ */
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/*-
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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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#ifndef lint
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__COPYRIGHT("@(#) 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 8.6 (Berkeley) 6/30/94";
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#else
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__RCSID("$NetBSD: w.c,v 1.47 2001/11/05 03:35:49 enami Exp $");
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#endif
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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/types.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 <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 <limits.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 <time.h>
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#include <tzfile.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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#define max(a,b) (((a)>(b))?(a):(b))
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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 left to print process args */
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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 sortidle; /* sort bu idle time */
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char *sel_user; /* login of particular user selected */
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char domain[MAXHOSTNAMELEN + 1];
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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_proc2 *kp; /* `most interesting' proc */
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#ifdef SUPPORT_FTPD_UTMP
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pid_t ftpd_pid; /* pid as extracted from ftpd's entry */
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#endif
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} *ep, *ehead = NULL, **nextp = &ehead;
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static void pr_args(struct kinfo_proc2 *);
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static void pr_header(time_t *, int);
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static struct stat *ttystat(char *, size_t);
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static void usage(int);
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int main(int, char **);
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int
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main(int argc, char **argv)
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{
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struct kinfo_proc2 *kp;
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struct hostent *hp;
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struct stat *stp;
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FILE *ut;
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struct in_addr l;
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time_t touched;
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int ch, i, nentries, nusers, wcmd, lognamelen;
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char *memf, *nlistf, *p, *x;
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const char *progname;
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char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX];
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/* Are we w(1) or uptime(1)? */
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progname = getprogname();
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if (*progname == '-')
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progname++;
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if (*progname == 'u') {
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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 = "hiflM:N:nsuw";
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}
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memf = nlistf = NULL;
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while ((ch = getopt(argc, argv, p)) != -1)
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switch (ch) {
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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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break;
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case 'N':
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nlistf = optarg;
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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 ((kd = kvm_openfiles(nlistf, memf, NULL,
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memf == NULL ? KVM_NO_FILES : 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 && wcmd)
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err(1, "%s", _PATH_UTMP);
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if (*argv)
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sel_user = *argv;
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for (nusers = 0; ut && 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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++nusers;
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if (wcmd == 0 || (sel_user &&
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strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
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continue;
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if ((ep = calloc(1, sizeof(struct entry))) == NULL)
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err(1, NULL);
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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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if (!(stp = ttystat(ep->utmp.ut_line, UT_LINESIZE))) {
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#ifdef SUPPORT_FTPD_UTMP
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/*
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* Hack to recognize and correctly parse
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* utmp entry made by ftpd. The "tty" used
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* by ftpd is not a real tty, just identifier in
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* form ftpPROCESS_ID. Pid parsed from the "tty name"
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* is used later to match corresponding process.
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*/
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if (strncmp(ep->utmp.ut_line, "ftp", 3) == 0)
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ep->ftpd_pid =
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strtol(ep->utmp.ut_line + 3, NULL, 10);
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#endif /* SUPPORT_FTPD_UTMP */
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continue;
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}
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ep->tdev = stp->st_rdev;
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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_KERN;
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mib[1] = KERN_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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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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if (ut)
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(void)fclose(ut);
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else
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nusers = 1;
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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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}
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if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0,
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sizeof(struct kinfo_proc2), &nentries)) == NULL)
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errx(1, "%s", kvm_geterr(kd));
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/* Include trailing space because TTY header starts one column early. */
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lognamelen = sizeof("USER ") - 1 /* NUL */;
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for (i = 0; i < nentries; i++, kp++) {
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if (kp->p_stat == SIDL || kp->p_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->p_tdev &&
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kp->p__pgid == kp->p_tpgid) {
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/*
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* Proc is in foreground of this terminal
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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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lognamelen = max(lognamelen,
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strlen(kp->p_login));
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}
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break;
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}
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#ifdef SUPPORT_FTPD_UTMP
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/*
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* Hack to match process to ftp utmp entry.
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*/
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else if (ep->tdev == 0 && kp->p_tdev == NODEV &&
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ep->ftpd_pid == kp->p_pid) {
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ep->kp = kp;
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lognamelen = max(lognamelen,
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strlen(kp->p_login));
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}
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#endif /* SUPPORT_FTPD_UTMP */
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}
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}
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argwidth = printf("%-*sTTY %-*s %*s IDLE WHAT\n",
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lognamelen, "USER", UT_HOSTSIZE, "FROM",
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7 /* "dddhhXm" */, "LOGIN@");
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argwidth -= sizeof("WHAT\n") - 1 /* NUL */;
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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 - argwidth;
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if (argwidth < 4)
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argwidth = 8;
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/* sort by idle time */
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if (sortidle && ehead != NULL) {
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struct entry *from = ehead, *save;
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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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int rv;
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rv = gethostname(domain, sizeof(domain));
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domain[sizeof(domain) - 1] = '\0';
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if (rv < 0 || (p = strchr(domain, '.')) == 0)
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domain[0] = '\0';
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else
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memmove(domain, p, strlen(p) + 1);
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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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for (x = p; x < p + UT_HOSTSIZE; x++)
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if (*x == '\0' || *x == ':')
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break;
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if (x == p + UT_HOSTSIZE || *x != ':')
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x = NULL;
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else
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*x++ = '\0';
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if (!nflag && inet_aton(p, &l) &&
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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 &&
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strcasecmp(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 (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 (ep->kp == NULL) {
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warnx("Stale utmp entry: %.*s %.*s %.*s",
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UT_NAMESIZE, ep->utmp.ut_name,
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UT_LINESIZE, ep->utmp.ut_line,
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UT_HOSTSIZE, ep->utmp.ut_host);
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continue;
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}
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(void)printf("%-*s %-2.2s %-*.*s ",
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lognamelen, ep->kp->p_login,
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(strncmp(ep->utmp.ut_line, "tty", 3) &&
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strncmp(ep->utmp.ut_line, "dty", 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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pr_idle(ep->idle);
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pr_args(ep->kp);
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(void)printf("\n");
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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_args(struct kinfo_proc2 *kp)
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{
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char **argv;
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int left;
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if (kp == 0)
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goto nothing;
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left = argwidth;
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argv = kvm_getargv2(kd, kp, argwidth);
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if (argv == 0)
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goto nothing;
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while (*argv) {
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fmt_puts(*argv, &left);
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argv++;
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fmt_putc(' ', &left);
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}
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return;
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nothing:
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putchar('-');
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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;
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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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* SCCS forces the string manipulation below, as it replaces
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* %, M, and % in a character string with the file name.
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*/
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(void)strftime(buf, sizeof(buf), "%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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if (uptime > SECSPERMIN) {
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days = uptime / SECSPERDAY;
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uptime %= SECSPERDAY;
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hrs = uptime / SECSPERHOUR;
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uptime %= SECSPERHOUR;
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mins = uptime / SECSPERMIN;
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(void)printf(" up");
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if (days > 0)
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(void)printf(" %d day%s,", days,
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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 {
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if (hrs > 0)
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(void)printf(" %d hr%s,",
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hrs, hrs > 1 ? "s" : "");
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if (mins > 0)
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(void)printf(" %d min%s,",
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mins, mins > 1 ? "s" : "");
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}
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}
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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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if (i > 0)
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(void)printf(",");
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(void)printf(" %.2f", avenrun[i]);
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}
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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(char *line, size_t 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, (int) sz,
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line);
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if (stat(ttybuf, &sb))
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return (NULL);
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return (&sb);
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}
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static void
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usage(int wcmd)
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{
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if (wcmd)
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(void)fprintf(stderr,
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"usage: w: [-hin] [-M core] [-N system] [user]\n");
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else
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(void)fprintf(stderr, "uptime\n");
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exit(1);
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}
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