OpenBSD-4.6/usr.bin/w/w.c
/* $OpenBSD: w.c,v 1.46 2008/09/30 21:29:58 millert Exp $ */
/*-
* Copyright (c) 1980, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94";
#else
static char *rcsid = "$OpenBSD: w.c,v 1.46 2008/09/30 21:29:58 millert Exp $";
#endif
#endif /* not lint */
/*
* w - print system status (who and what)
*
* This program is similar to the systat command on Tenex/Tops 10/20
*
*/
#include <sys/param.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/tty.h>
#include <machine/cpu.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <kvm.h>
#include <netdb.h>
#include <nlist.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <tzfile.h>
#include <unistd.h>
#include <limits.h>
#include <utmp.h>
#include <vis.h>
#include "extern.h"
struct timeval boottime;
struct utmp utmp;
struct winsize ws;
kvm_t *kd;
time_t now; /* the current time of day */
int ttywidth; /* width of tty */
int argwidth; /* width of tty */
int header = 1; /* true if -h flag: don't print heading */
int nflag = 1; /* true if -n flag: don't convert addrs */
int sortidle; /* sort bu idle time */
char *sel_user; /* login of particular user selected */
char domain[MAXHOSTNAMELEN];
#define NAME_WIDTH 8
#define HOST_WIDTH 16
/*
* One of these per active utmp entry.
*/
struct entry {
struct entry *next;
struct utmp utmp;
dev_t tdev; /* dev_t of terminal */
time_t idle; /* idle time of terminal in seconds */
struct kinfo_proc2 *kp; /* `most interesting' proc */
} *ep, *ehead = NULL, **nextp = &ehead;
static void pr_args(struct kinfo_proc2 *);
static void pr_header(time_t *, int);
static struct stat
*ttystat(char *);
static void usage(int);
int
main(int argc, char *argv[])
{
extern char *__progname;
struct kinfo_proc2 *kp;
struct hostent *hp;
struct stat *stp;
FILE *ut;
struct in_addr addr;
int ch, i, nentries, nusers, wcmd;
char *memf, *nlistf, *p, *x;
char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX];
/* Are we w(1) or uptime(1)? */
p = __progname;
if (*p == '-')
p++;
if (p[0] == 'w' && p[1] == '\0') {
wcmd = 1;
p = "hiflM:N:asuw";
} else if (!strcmp(p, "uptime")) {
wcmd = 0;
p = "";
} else
errx(1,
"this program should be invoked only as \"w\" or \"uptime\"");
memf = nlistf = NULL;
while ((ch = getopt(argc, argv, p)) != -1)
switch (ch) {
case 'h':
header = 0;
break;
case 'i':
sortidle = 1;
break;
case 'M':
header = 0;
memf = optarg;
break;
case 'N':
nlistf = optarg;
break;
case 'a':
nflag = 0;
break;
case 'f': case 'l': case 's': case 'u': case 'w':
warnx("[-flsuw] no longer supported");
/* FALLTHROUGH */
case '?':
default:
usage(wcmd);
}
argc -= optind;
argv += optind;
if (nlistf == NULL && memf == NULL) {
if ((kd = kvm_openfiles(nlistf, memf, NULL, KVM_NO_FILES,
errbuf)) == NULL)
errx(1, "%s", errbuf);
} else {
if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
errx(1, "%s", errbuf);
}
(void)time(&now);
if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
err(1, "%s", _PATH_UTMP);
if (*argv)
sel_user = *argv;
for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
if (utmp.ut_name[0] == '\0')
continue;
++nusers;
if (wcmd == 0 || (sel_user &&
strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
continue;
if ((ep = calloc(1, sizeof(*ep))) == NULL)
err(1, NULL);
*nextp = ep;
nextp = &(ep->next);
memcpy(&(ep->utmp), &utmp, sizeof(utmp));
if (!(stp = ttystat(ep->utmp.ut_line)))
continue;
ep->tdev = stp->st_rdev;
#ifdef CPU_CONSDEV
/*
* 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_MACHDEP;
mib[1] = CPU_CONSDEV;
size = sizeof(dev_t);
(void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
}
#endif
if ((ep->idle = now - stp->st_atime) < 0)
ep->idle = 0;
}
(void)fclose(ut);
if (header || wcmd == 0) {
pr_header(&now, nusers);
if (wcmd == 0)
exit (0);
}
#define HEADER "USER TTY FROM LOGIN@ IDLE WHAT"
#define WUSED (sizeof(HEADER) - sizeof("WHAT"))
(void)puts(HEADER);
kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, sizeof(*kp), &nentries);
if (kp == NULL)
errx(1, "%s", kvm_geterr(kd));
for (i = 0; i < nentries; i++, kp++) {
if (kp->p_stat == SIDL || kp->p_stat == SZOMB)
continue;
for (ep = ehead; ep != NULL; ep = ep->next) {
/* ftp is a special case. */
if (strncmp(ep->utmp.ut_line, "ftp", 3) == 0) {
char pidstr[UT_LINESIZE-2];
pid_t fp;
(void)strncpy(pidstr, &ep->utmp.ut_line[3],
sizeof(pidstr) - 1);
pidstr[sizeof(pidstr) - 1] = '\0';
fp = (pid_t)strtol(pidstr, NULL, 10);
if (kp->p_pid == fp) {
ep->kp = kp;
break;
}
} else if (ep->tdev == kp->p_tdev &&
kp->p__pgid == kp->p_tpgid) {
/*
* Proc is in foreground of this terminal
*/
if (proc_compare(ep->kp, kp))
ep->kp = kp;
break;
}
}
}
if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
ttywidth = 79;
else
ttywidth = ws.ws_col - 1;
argwidth = ttywidth - WUSED;
if (argwidth < 4)
argwidth = 8;
/* sort by idle time */
if (sortidle && ehead != NULL) {
struct entry *from = ehead, *save;
ehead = NULL;
while (from != NULL) {
for (nextp = &ehead;
(*nextp) && from->idle >= (*nextp)->idle;
nextp = &(*nextp)->next)
continue;
save = from;
from = from->next;
save->next = *nextp;
*nextp = save;
}
}
if (!nflag) {
if (gethostname(domain, sizeof(domain)) < 0 ||
(p = strchr(domain, '.')) == 0)
domain[0] = '\0';
else {
domain[sizeof(domain) - 1] = '\0';
memmove(domain, p, strlen(p) + 1);
}
}
for (ep = ehead; ep != NULL; ep = ep->next) {
p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-";
for (x = NULL, i = 0; p[i] != '\0' && i < UT_HOSTSIZE; i++)
if (p[i] == ':') {
x = &p[i];
*x++ = '\0';
break;
}
if (!nflag && inet_aton(p, &addr) &&
(hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET))) {
if (domain[0] != '\0') {
p = hp->h_name;
p += strlen(hp->h_name);
p -= strlen(domain);
if (p > hp->h_name &&
strcasecmp(p, domain) == 0)
*p = '\0';
}
p = hp->h_name;
}
if (x) {
(void)snprintf(buf, sizeof(buf), "%s:%.*s", p,
(int)(ep->utmp.ut_host + UT_HOSTSIZE - x), x);
p = buf;
}
(void)printf("%-*.*s %-2.2s %-*.*s ",
NAME_WIDTH, UT_NAMESIZE, ep->utmp.ut_name,
strncmp(ep->utmp.ut_line, "tty", 3) ?
ep->utmp.ut_line : ep->utmp.ut_line + 3,
HOST_WIDTH, HOST_WIDTH, *p ? p : "-");
pr_attime(&ep->utmp.ut_time, &now);
pr_idle(ep->idle);
pr_args(ep->kp);
printf("\n");
}
exit(0);
}
static void
pr_args(struct kinfo_proc2 *kp)
{
char **argv, *str;
int left;
if (kp == NULL)
goto nothing; /* XXX - can this happen? */
left = argwidth;
argv = kvm_getargv2(kd, kp, argwidth+60); /* +60 for ftpd snip */
if (argv == NULL)
goto nothing;
if (*argv == NULL || **argv == '\0') {
/* Process has zeroed argv[0], display executable name. */
fmt_putc('(', &left);
fmt_puts(kp->p_comm, &left);
fmt_putc(')', &left);
}
while (*argv) {
/*
* ftp argv[0] is in the following format:
* ftpd: HOSTNAME: [USER/PASS: ]CMD args (ftpd)
*/
if (strncmp(*argv, "ftpd:", 5) == 0) {
if ((str = strchr(*argv + 5, ':')) != NULL)
str = strchr(str + 1, ':');
if (str != NULL) {
if ((str[0] == ':') && isspace(str[1]))
str += 2;
fmt_puts(str, &left);
} else
fmt_puts(*argv, &left);
} else
fmt_puts(*argv, &left);
argv++;
fmt_putc(' ', &left);
}
return;
nothing:
putchar('-');
}
static void
pr_header(time_t *nowp, int nusers)
{
double avenrun[3];
time_t uptime;
int days, hrs, i, mins;
int mib[2];
size_t size;
char buf[256];
/*
* Print time of day.
*/
(void)strftime(buf, sizeof(buf) - 1, "%l:%M%p", localtime(nowp));
buf[sizeof(buf) - 1] = '\0';
(void)printf("%s ", buf);
/*
* Print how long system has been up.
* (Found by looking getting "boottime" from the kernel)
*/
mib[0] = CTL_KERN;
mib[1] = KERN_BOOTTIME;
size = sizeof(boottime);
if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1) {
uptime = now - boottime.tv_sec;
if (uptime > 59) {
uptime += 30;
days = uptime / SECSPERDAY;
uptime %= SECSPERDAY;
hrs = uptime / SECSPERHOUR;
uptime %= SECSPERHOUR;
mins = uptime / SECSPERMIN;
(void)printf(" up");
if (days > 0)
(void)printf(" %d day%s,", days,
days > 1 ? "s" : "");
if (hrs > 0 && mins > 0)
(void)printf(" %2d:%02d,", hrs, mins);
else {
if (hrs > 0)
(void)printf(" %d hr%s,",
hrs, hrs > 1 ? "s" : "");
if (mins > 0 || (days == 0 && hrs == 0))
(void)printf(" %d min%s,",
mins, mins != 1 ? "s" : "");
}
} else
printf(" %d secs,", uptime);
}
/* 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");
}
}
static struct stat *
ttystat(char *line)
{
static struct stat sb;
char ttybuf[sizeof(_PATH_DEV) + UT_LINESIZE];
/* Note, line may not be NUL-terminated */
(void)strlcpy(ttybuf, _PATH_DEV, sizeof(ttybuf));
(void)strncat(ttybuf, line, sizeof(ttybuf) - 1 - strlen(ttybuf));
if (stat(ttybuf, &sb))
return (NULL);
return (&sb);
}
static void
usage(int wcmd)
{
if (wcmd)
(void)fprintf(stderr,
"usage: w [-ahi] [-M core] [-N system] [user]\n");
else
(void)fprintf(stderr,
"usage: uptime\n");
exit (1);
}