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ERR_error_string(3)          OpenSSL          ERR_error_string(3)

       ERR_error_string, ERR_error_string_n,
       ERR_lib_error_string, ERR_func_error_string, ERR_rea-
       son_error_string - obtain human-readable error message


        char *ERR_error_string(unsigned long e, char *buf);
        char *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);

       ERR_error_string() generates a human-readable string rep-
       resenting the error code e, and places it at buf. buf must
       be at least 120 bytes long. If buf is NULL, the error
       string is placed in a static buffer.  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, func-
       tion name and reason string respectively.

       The OpenSSL error strings should be loaded by calling
       ERR_load_crypto_strings(3) or, for SSL applications,
       SSL_load_error_strings(3) first.  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.

       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.

       err(3), ERR_get_error(3), ERR_load_crypto_strings(3),
       SSL_load_error_strings(3) ERR_print_errors(3)

       ERR_error_string() is available in all versions of SSLeay
       and OpenSSL.  ERR_error_string_n() was added in OpenSSL

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