man ustrerror () - Returns a string describing errno. Allegro game programming library.
NAME
ustrerror - Returns a string describing errno. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
const char *ustrerror(int err);
DESCRIPTION
This function returns a string that describes the error code `err', which normally comes from the variable `errno'. Example:
PACKFILE *input_file = pack_fopen("badname", "r");
if (input_file == NULL)
allegro_message("%s\nSorry!\n", ustrerror(errno));
RETURN VALUE
Returns a pointer to a static string that should not be modified or freed. If you make subsequent calls to ustrerror(), the string will be overwritten.