procps/uptime.c
Sami Kerola 05765771c2 uptime: new usage & fix coding style
Coding style fixed and more readable help output.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
2011-12-20 17:17:02 +01:00

46 lines
969 B
C

#include <errno.h>
#include <getopt.h>
#include <stdlib.h>
#include <stdio.h>
#include "proc/whattime.h"
#include "proc/version.h"
static void __attribute__ ((__noreturn__))
usage(FILE * out)
{
fprintf(out,
"\nUsage: %s [options]\n"
"\nOptions:\n", program_invocation_short_name);
fprintf(out,
" -h, --help display this help text\n"
" -V, --version display version information and exit\n");
fprintf(out, "\nFor more information see uptime(1).\n");
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
int c;
static const struct option longopts[] = {
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{NULL, 0, NULL, 0}
};
while ((c = getopt_long(argc, argv, "hV", longopts, NULL)) != -1)
switch (c) {
case 'h':
usage(stdout);
case 'V':
display_version();
return EXIT_SUCCESS;
default:
usage(stderr);
}
print_uptime();
return EXIT_SUCCESS;
}