man file_time () - Returns the modification time of a file. Allegro game programming library.
NAME
file_time - Returns the modification time of a file. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
time_t file_time(const char *filename);
DESCRIPTION
Returns the modification time (number of seconds since 00:00:00 GMT 1/1/1970) of a file. If the file does not exist or an error occurs, it will return zero and store the system error code in errno.