Developer's Daily | Unix by Example |
main | java | perl | unix | dev directory | web log |
ERR_error_string ? obtain human-readable error message |
#include <openssl/err.h> 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); |
ERR_error_string() generates a human-readable string representing 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. 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. 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. |