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/* GNU's uptime.
Copyright (C) 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Written by jla; revised by djm */
#include <config.h>
#include <getopt.h>
#include "system.h"
#include "error.h"
#include "readutmp.h"
/* The name this program was run with. */
char *program_name;
/* If nonzero, display usage information and exit. */
static int show_help;
/* If nonzero, print the version on standard output and exit. */
static int show_version;
static struct option const longopts[] =
{
{"help", no_argument, &show_help, 1},
{"version", no_argument, &show_version, 1},
{NULL, 0, NULL, 0}
};
static void
print_uptime (int n, const STRUCT_UTMP *this)
{
register int entries = 0;
time_t boot_time = 0;
time_t time_now;
time_t uptime = 0;
int updays;
int uphours;
int upmins;
struct tm *tmn;
double avg[3];
int loads;
#ifdef HAVE_PROC_UPTIME
FILE *fp;
double upsecs;
fp = fopen ("/proc/uptime", "r");
if (fp != NULL)
{
char buf[BUFSIZ];
int res;
fgets (buf, BUFSIZ, fp);
res = sscanf (buf, "%lf", &upsecs);
if (res == 1)
uptime = (time_t) upsecs;
fclose (fp);
}
#endif /* HAVE_PROC_UPTIME */
/* Loop through all the utmp entries we just read and count up the valid
ones, also in the process possibly gleaning boottime. */
while (n--)
{
if (this->ut_name[0]
#ifdef USER_PROCESS
&& this->ut_type == USER_PROCESS
#endif
)
{
++entries;
}
/* If BOOT_MSG is defined, we can get boottime from utmp. This avoids
possibly needing special privs to read /dev/kmem. */
#ifdef BOOT_MSG
# if HAVE_PROC_UPTIME
if (uptime == 0)
# endif /* HAVE_PROC_UPTIME */
if (!strcmp (this->ut_line, BOOT_MSG))
boot_time = UT_TIME_MEMBER (this);
#endif /* BOOT_MSG */
++this;
}
time_now = time (0);
#if defined HAVE_PROC_UPTIME
if (uptime == 0)
#endif
{
if (boot_time == 0)
error (1, errno, _("couldn't get boot time"));
uptime = time_now - boot_time;
}
updays = uptime / 86400;
uphours = (uptime - (updays * 86400)) / 3600;
upmins = (uptime - (updays * 86400) - (uphours * 3600)) / 60;
tmn = localtime (&time_now);
printf (_(" %2d:%02d%s up "), ((tmn->tm_hour % 12) == 0
? 12 : tmn->tm_hour % 12),
/* FIXME: use strftime, not am, pm. Uli reports that
the german translation is meaningless. */
tmn->tm_min, (tmn->tm_hour < 12 ? _("am") : _("pm")));
if (updays > 0)
printf ("%d %s,", updays, (updays == 1 ? _("day") : _("days")));
printf (" %2d:%02d, %d %s", uphours, upmins, entries,
(entries == 1) ? _("user") : _("users"));
#if defined (HAVE_GETLOADAVG) || defined (C_GETLOADAVG)
loads = getloadavg (avg, 3);
#else
loads = -1;
#endif
if (loads == -1)
putchar ('\n');
else
{
if (loads > 0)
printf (_(", load average: %.2f"), avg[0]);
if (loads > 1)
printf (", %.2f", avg[1]);
if (loads > 2)
printf (", %.2f", avg[2]);
if (loads > 0)
putchar ('\n');
}
}
/* Display the system uptime and the number of users on the system,
according to utmp file FILENAME. */
static void
uptime (const char *filename)
{
int n_users;
STRUCT_UTMP *utmp_buf;
int fail = read_utmp (filename, &n_users, &utmp_buf);
if (fail)
error (1, errno, "%s", filename);
print_uptime (n_users, utmp_buf);
}
static void
usage (int status)
{
if (status != 0)
fprintf (stderr, _("Try `%s --help' for more information.\n"),
program_name);
else
{
printf (_("Usage: %s [OPTION]... [ FILE ]\n"), program_name);
printf (_("\
Output who is currently logged in according to FILE.\n\
If FILE is not specified, use %s. %s as FILE is common.\n\
\n\
--help display this help and exit\n\
--version output version information and exit\n"),
UTMP_FILE, WTMP_FILE);
puts (_("\nReport bugs to <sh-utils-bugs@gnu.org>."));
}
exit (status);
}
int
main (int argc, char **argv)
{
int optc, longind;
program_name = argv[0];
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
while ((optc = getopt_long (argc, argv, "", longopts, &longind)) != -1)
{
switch (optc)
{
case 0:
break;
default:
usage (1);
}
}
if (show_version)
{
printf ("uptime (%s) %s\n", GNU_PACKAGE, VERSION);
exit (0);
}
if (show_help)
usage (0);
switch (argc - optind)
{
case 0: /* uptime */
uptime (UTMP_FILE);
break;
case 1: /* uptime <utmp file> */
uptime (argv[optind]);
break;
default: /* lose */
error (0, 0, _("too many arguments"));
usage (1);
}
exit (0);
}
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