libmagic_example.c

#include <stdio.h>
#include <magic.h>

int main(void)
{
	char *actual_file = "/file/you/want.yay";
	const char *magic_full;
	magic_t magic_cookie;
	/*MAGIC_MIME tells magic to return a mime of the file, but you can specify different things*/
	magic_cookie = magic_open(MAGIC_MIME);
		if (magic_cookie == NULL) {
	        printf("unable to initialize magic library\n");
	        return 1;
		    }
	    printf("Loading default magic database\n");
	    if (magic_load(magic_cookie, NULL) != 0) {
	        printf("cannot load magic database - %s\n", magic_error(magic_cookie));
	        magic_close(magic_cookie);
	        return 1;
	    }
	magic_full = magic_file(magic_cookie, actual_file);
	printf("%s\n", magic_full);
	magic_close(magic_cookie);
        return 0;
}