618 lines
15 KiB
C
618 lines
15 KiB
C
/* $NetBSD: w.c,v 1.58 2003/02/26 19:10:28 christos 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 1.58 2003/02/26 19:10:28 christos 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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#ifdef SUPPORT_UTMP
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#include <utmp.h>
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#endif
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#ifdef SUPPORT_UTMPX
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#include <utmpx.h>
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#endif
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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 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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int maxname = 8, maxline = 3, maxhost = 16;
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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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char name[65];
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char line[65];
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char host[257];
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char type[2];
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struct timeval tv;
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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 *tp; /* `most interesting' tty proc */
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struct kinfo_proc2 *pp; /* pid proc */
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pid_t pid; /* pid or ~0 if not known */
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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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#if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX)
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static struct stat *ttystat(char *);
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static void process(struct entry *);
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#endif
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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 in_addr l;
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int ch, i, nentries, nusers, wcmd;
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char *memf, *nlistf, *p, *x;
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time_t then;
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#ifdef SUPPORT_UTMP
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struct utmp *ut;
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#endif
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#ifdef SUPPORT_UTMPX
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struct utmpx *utx;
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#endif
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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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#ifdef SUPPORT_UTMPX
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setutxent();
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#endif
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#ifdef SUPPORT_UTMP
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setutent();
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#endif
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if (*argv)
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sel_user = *argv;
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nusers = 0;
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#ifdef SUPPORT_UTMPX
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while ((utx = getutxent()) != NULL) {
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if (utx->ut_type != USER_PROCESS)
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continue;
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++nusers;
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if (sel_user &&
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strncmp(utx->ut_name, sel_user, sizeof(utx->ut_name) != 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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(void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name));
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(void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line));
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ep->name[sizeof(utx->ut_name)] = '\0';
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ep->line[sizeof(utx->ut_line)] = '\0';
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if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss,
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utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0,
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NI_NUMERICHOST) != 0) {
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(void)memcpy(ep->host, utx->ut_host,
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sizeof(utx->ut_host));
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ep->host[sizeof(utx->ut_host)] = '\0';
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}
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ep->type[0] = 'x';
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ep->tv = utx->ut_tv;
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ep->pid = utx->ut_pid;
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*nextp = ep;
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nextp = &(ep->next);
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if (wcmd != 0)
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process(ep);
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}
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#endif
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#ifdef SUPPORT_UTMP
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while ((ut = getutent()) != NULL) {
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if (ut->ut_name[0] == '\0')
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continue;
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if (sel_user &&
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strncmp(ut->ut_name, sel_user, sizeof(ut->ut_name) != 0))
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continue;
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/* Don't process entries that we have utmpx for */
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for (ep = ehead; ep != NULL; ep = ep->next) {
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if (strncmp(ep->line, ut->ut_line,
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sizeof(ut->ut_line)) == 0)
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break;
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}
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if (ep != NULL)
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continue;
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++nusers;
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if ((ep = calloc(1, sizeof(struct entry))) == NULL)
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err(1, NULL);
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(void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name));
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(void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line));
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(void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host));
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ep->name[sizeof(ut->ut_name)] = '\0';
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ep->line[sizeof(ut->ut_line)] = '\0';
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ep->host[sizeof(ut->ut_host)] = '\0';
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ep->tv.tv_sec = ut->ut_time;
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*nextp = ep;
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nextp = &(ep->next);
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if (wcmd != 0)
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process(ep);
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}
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#endif
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#ifdef SUPPORT_UTMPX
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endutxent();
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#endif
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#ifdef SUPPORT_UTMP
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endutent();
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#endif
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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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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 != 0 && 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
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* terminal
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*/
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if (proc_compare(ep->tp, kp))
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ep->tp = kp;
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break;
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}
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if (ep->pid != 0 && ep->pid == kp->p_pid) {
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ep->pp = kp;
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break;
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}
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}
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}
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argwidth = printf("%-*sTTY %-*s %*s IDLE WHAT\n",
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maxname, "USER", maxhost, "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 defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX)
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else if (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) && strcmp(from->line, (*nextp)->line) > 0;
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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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#endif
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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[MAXHOSTNAMELEN + 1];
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host_buf[MAXHOSTNAMELEN] = '\0';
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strncpy(host_buf, ep->host, MAXHOSTNAMELEN);
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p = *host_buf ? host_buf : "-";
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for (x = p; x < p + MAXHOSTNAMELEN; x++)
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if (*x == '\0' || *x == ':')
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break;
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if (x == p + MAXHOSTNAMELEN || *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->tp != NULL)
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kp = ep->tp;
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else if (ep->pp != NULL)
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kp = ep->pp;
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else {
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warnx("Stale utmp%s entry: %s %s %s",
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ep->type, ep->name, ep->line, ep->host);
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continue;
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}
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(void)printf("%-*s %-2.2s %-*.*s ",
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maxname, kp->p_login,
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(strncmp(ep->line, "tty", 3) &&
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strncmp(ep->line, "dty", 3)) ?
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ep->line : ep->line + 3,
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maxhost, maxhost, *p ? p : "-");
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then = (time_t)ep->tv.tv_sec;
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pr_attime(&then, &now);
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pr_idle(ep->idle);
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pr_args(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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if (kp->p_comm == 0) {
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goto nothing;
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} else {
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fmt_putc('(', &left);
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fmt_puts((char *)kp->p_comm, &left);
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fmt_putc(')', &left);
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return;
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}
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}
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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,",
|
|
mins, mins > 1 ? "s" : "");
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Print number of users logged in to system */
|
|
(void)printf(" %d user%s", nusers, nusers != 1 ? "s" : "");
|
|
|
|
/*
|
|
* Print 1, 5, and 15 minute load averages.
|
|
*/
|
|
if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
|
|
(void)printf(", no load average information available\n");
|
|
else {
|
|
(void)printf(", load averages:");
|
|
for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
|
|
if (i > 0)
|
|
(void)printf(",");
|
|
(void)printf(" %.2f", avenrun[i]);
|
|
}
|
|
(void)printf("\n");
|
|
}
|
|
}
|
|
|
|
#if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX)
|
|
static struct stat *
|
|
ttystat(char *line)
|
|
{
|
|
static struct stat sb;
|
|
char ttybuf[MAXPATHLEN];
|
|
|
|
(void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line);
|
|
if (stat(ttybuf, &sb))
|
|
return (NULL);
|
|
return (&sb);
|
|
}
|
|
|
|
static void
|
|
process(struct entry *ep)
|
|
{
|
|
struct stat *stp;
|
|
time_t touched;
|
|
int max;
|
|
|
|
if ((max = strlen(ep->name)) > maxname)
|
|
maxname = max;
|
|
if ((max = strlen(ep->line)) > maxline)
|
|
maxline = max;
|
|
if ((max = strlen(ep->host)) > maxhost)
|
|
maxhost = max;
|
|
|
|
|
|
#ifdef SUPPORT_UTMP
|
|
/*
|
|
* Hack to recognize and correctly parse
|
|
* ut entry made by ftpd. The "tty" used
|
|
* by ftpd is not a real tty, just identifier in
|
|
* form ftpSUPPORT_ID. Pid parsed from the "tty name"
|
|
* is used later to match corresponding process.
|
|
* NB: This is only used for utmp entries. For utmpx,
|
|
* we already have the pid.
|
|
*/
|
|
if (ep->pid == 0 && strncmp(ep->line, "ftp", 3) == 0) {
|
|
ep->pid = strtol(ep->line + 3, NULL, 10);
|
|
return;
|
|
}
|
|
#endif
|
|
if ((stp = ttystat(ep->line)) == NULL)
|
|
return;
|
|
|
|
ep->tdev = stp->st_rdev;
|
|
/*
|
|
* If this is the console device, attempt to ascertain
|
|
* the true console device dev_t.
|
|
*/
|
|
if (ep->tdev == 0) {
|
|
int mib[2];
|
|
size_t size;
|
|
|
|
mib[0] = CTL_KERN;
|
|
mib[1] = KERN_CONSDEV;
|
|
size = sizeof(dev_t);
|
|
(void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
|
|
}
|
|
|
|
touched = stp->st_atime;
|
|
if (touched < ep->tv.tv_sec) {
|
|
/* tty untouched since before login */
|
|
touched = ep->tv.tv_sec;
|
|
}
|
|
if ((ep->idle = now - touched) < 0)
|
|
ep->idle = 0;
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
usage(int wcmd)
|
|
{
|
|
|
|
if (wcmd)
|
|
(void)fprintf(stderr,
|
|
"usage: w: [-hin] [-M core] [-N system] [user]\n");
|
|
else
|
|
(void)fprintf(stderr, "uptime\n");
|
|
exit(1);
|
|
}
|