get_extension (3) - Linux Manuals
get_extension: Returns a pointer to the extension of a filename. Allegro game programming library.
NAME
get_extension - Returns a pointer to the extension of a filename. Allegro game programming library.SYNOPSIS
#include <allegro.h>
char *get_extension(const char *filename);
DESCRIPTION
Finds out the extension of the filename (with or without path information). Example:
get_executable_name(name, sizeof(name)); allegro_message("The binary has the extension `%s'\n", get_extension(name));