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uptime: add since option

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The --since or -s option will show the time since the host was online.
Reference(s):
http://www.freelists.org/post/procps/Patch-Added-since-option-to-uptime

Signed-off-by: Craig Small <csmall@enc.com.au>
This commit is contained in:
Frank Fesevur 2012-12-26 23:14:09 +11:00 committed by Craig Small
parent 6c67c8d27a
commit a705fdcb15
2 changed files with 35 additions and 2 deletions
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5
uptime.1
View File

@ -1,6 +1,6 @@
.\" -*-Nroff-*-
.\"
.TH UPTIME "1" "June 2011" "procps-ng" "User Commands"
.TH UPTIME "1" "December 2012" "procps-ng" "User Commands"
.SH NAME
uptime \- Tell how long the system has been running.
.SH SYNOPSIS
@ -28,6 +28,9 @@ the time.
\fB\-h\fR, \fB\-\-help\fR
display this help text
.TP
\fB\-s\fR, \fB\-\-since\fR
system up since, in yyyy-mm-dd MM:HH:SS format
.TP
\fB\-V\fR, \fB\-\-version\fR
display version information and exit
.SH FILES

32
uptime.c
View File

@ -21,19 +21,45 @@
#include <getopt.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <sys/time.h>
#include "c.h"
#include "fileutils.h"
#include "nls.h"
#include "proc/sysinfo.h"
#include "proc/whattime.h"
#include "proc/version.h"
static void print_uptime_since()
{
double now, uptime_secs, idle_secs;
time_t up_since_secs;
struct tm *up_since;
struct timeval tim;
/* Get the current time and convert it to a double */
gettimeofday(&tim, NULL);
now = tim.tv_sec + (tim.tv_usec / 1000000.0);
/* Get the uptime and calculate when that was */
uptime(&uptime_secs, &idle_secs);
up_since_secs = (time_t) ((now - uptime_secs) + 0.5);
/* Show this */
up_since = localtime(&up_since_secs);
printf("%04d-%02d-%02d %02d:%02d:%02d\n",
up_since->tm_year + 1900, up_since->tm_mon + 1, up_since->tm_mday,
up_since->tm_hour, up_since->tm_min, up_since->tm_sec);
}
static void __attribute__ ((__noreturn__)) usage(FILE * out)
{
fputs(USAGE_HEADER, out);
fprintf(out, _(" %s [options]\n"), program_invocation_short_name);
fputs(USAGE_OPTIONS, out);
fputs(USAGE_HELP, out);
fputs(_(" -s, --since system up since\n"), out);
fputs(USAGE_VERSION, out);
fprintf(out, USAGE_MAN_TAIL("uptime(1)"));
@ -46,6 +72,7 @@ int main(int argc, char **argv)
static const struct option longopts[] = {
{"help", no_argument, NULL, 'h'},
{"since", no_argument, NULL, 's'},
{"version", no_argument, NULL, 'V'},
{NULL, 0, NULL, 0}
};
@ -56,10 +83,13 @@ int main(int argc, char **argv)
textdomain(PACKAGE);
atexit(close_stdout);
while ((c = getopt_long(argc, argv, "hV", longopts, NULL)) != -1)
while ((c = getopt_long(argc, argv, "hsV", longopts, NULL)) != -1)
switch (c) {
case 'h':
usage(stdout);
case 's':
print_uptime_since();
return EXIT_SUCCESS;
case 'V':
printf(PROCPS_NG_VERSION);
return EXIT_SUCCESS;