56 lines
945 B
C
56 lines
945 B
C
|
/*
|
||
|
|
* Outputs the value of time(2) with the 16 least significant bits zeroed out.
|
||
|
|
* For use in context keyed payload encoding.
|
||
|
|
*
|
||
|
|
* Author: Dimitris Glynos <dimitris at census-labs.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#define __USE_XOPEN
|
||
|
|
#include <time.h>
|
||
|
|
|
||
|
|
char *app = NULL;
|
||
|
|
|
||
|
|
void croak_usage(void)
|
||
|
|
{
|
||
|
|
fprintf(stderr, "usage: %s [date & time]\n"
|
||
|
|
"\tSupported date & time format: 'YYYY-MM-DD HH:MM:SS'\n"
|
||
|
|
"\te.g. %s '2003-11-04 14:23:10'\n",
|
||
|
|
app, app);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
time_t parse_time(const char *input)
|
||
|
|
{
|
||
|
|
struct tm t;
|
||
|
|
char *p;
|
||
|
|
|
||
|
|
p = strptime(input, "%Y-%m-%d %H:%M:%S", &t);
|
||
|
|
|
||
|
|
if ((!p) || (*p != '\0')) {
|
||
|
|
fprintf(stderr, "error while processing time spec!\n");
|
||
|
|
croak_usage();
|
||
|
|
}
|
||
|
|
|
||
|
|
return mktime(&t);
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(int argc, char *argv[])
|
||
|
|
{
|
||
|
|
time_t t;
|
||
|
|
|
||
|
|
app = argv[0];
|
||
|
|
|
||
|
|
if (argc > 2)
|
||
|
|
croak_usage();
|
||
|
|
|
||
|
|
if (argc == 2)
|
||
|
|
t = parse_time(argv[1]);
|
||
|
|
else
|
||
|
|
t = time(NULL);
|
||
|
|
|
||
|
|
printf("%#.8lx\n", t & 0xffff0000);
|
||
|
|
return 0;
|
||
|
|
}
|