=pod =head1 NAME ERR_error_string - obtain human-readable error message =head1 SYNOPSIS #include char *ERR_error_string(unsigned long e, char *buf); const char *ERR_lib_error_string(unsigned long e); const char *ERR_func_error_string(unsigned long e); const char *ERR_reason_error_string(unsigned long e); =head1 DESCRIPTION ERR_error_string() generates a human-readable string representing the error code B, and places it at B. B must be at least 120 bytes long. If B is B, the error string is placed in a static buffer. The string will have the following format: error:[error code]:[library name]:[function name]:[reason string] I is an 8 digit hexadecimal number, I, I and I are ASCII text. ERR_lib_error_string(), ERR_func_error_string() and ERR_reason_error_string() return the library name, function name and reason string respectively. The OpenSSL error strings should be loaded by calling L or, for SSL applications, L first. If there is no text string registered for the given error code, the error string will contain the numeric code. L can be used to print all error codes currently in the queue. =head1 RETURN VALUES ERR_error_string() returns a pointer to a static buffer containing the string if B, B otherwise. ERR_lib_error_string(), ERR_func_error_string() and ERR_reason_error_string() return the strings, and B if none is registered for the error code. =head1 SEE ALSO L, L, L, L L =head1 HISTORY ERR_error_string() is available in all versions of SSLeay and OpenSSL. =cut