ERR_error_string(3) OpenSSL ERR_error_string(3)
NAME
ERR_error_string, ERR_error_string_n, ERR_lib_error_string,
ERR_func_error_string, ERR_reason_error_string - obtain human-readable
error message
SYNOPSIS
#include <openssl/err.h>
char *ERR_error_string(unsigned long e, char *buf);
void ERR_error_string_n(unsigned long e, char *buf, size_t len);
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);
DESCRIPTION
ERR_error_string() generates a human-readable string representing the
error code e, and places it at buf. buf must be at least 256 bytes
long. If buf is NULL, the error string is placed in a static buffer.
Note that this function is not thread-safe and does no checks on the
size of the buffer; use ERR_error_string_n() instead.
ERR_error_string_n() is a variant of ERR_error_string() that writes at
most len characters (including the terminating 0) and truncates the
string if necessary. For ERR_error_string_n(), buf may not be NULL.
The string will have the following format:
error:[error code]:[library name]:[function name]:[reason string]
error code is an 8 digit hexadecimal number, library name, function
name and reason string 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.
If there is no text string registered for the given error code, the
error string will contain the numeric code.
ERR_print_errors(3) can be used to print all error codes currently in
the queue.
RETURN VALUES
ERR_error_string() returns a pointer to a static buffer containing the
string if buf == NULL, buf otherwise.
ERR_lib_error_string(), ERR_func_error_string() and
ERR_reason_error_string() return the strings, and NULL if none is
registered for the error code.
SEE ALSO
ERR_get_error(3), ERR_print_errors(3)
COPYRIGHT
Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.
1.1.1d 2019-09-10 ERR_error_string(3)
openssl 1.1.1d - Generated Sun Sep 22 05:46:20 CDT 2019