65 lines
1.9 KiB
Text
65 lines
1.9 KiB
Text
=pod
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=head1 NAME
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ERR_error_string - obtain human-readable error message
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=head1 SYNOPSIS
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#include <openssl/err.h>
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char *ERR_error_string(unsigned long e, char *buf);
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const char *ERR_lib_error_string(unsigned long e);
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const char *ERR_func_error_string(unsigned long e);
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const char *ERR_reason_error_string(unsigned long e);
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=head1 DESCRIPTION
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ERR_error_string() generates a human-readable string representing the
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error code B<e>, and places it at B<buf>. B<buf> must be at least 120
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bytes long. If B<buf> is B<NULL>, the error string is placed in a
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static buffer.
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The string will have the following format:
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error:[error code]:[library name]:[function name]:[reason string]
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I<error code> is an 8 digit hexadecimal number, I<library name>,
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I<function name> and I<reason string> are ASCII text.
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ERR_lib_error_string(), ERR_func_error_string() and
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ERR_reason_error_string() return the library name, function
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name and reason string respectively.
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The OpenSSL error strings should be loaded by calling
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L<ERR_load_crypto_strings(3)|ERR_load_crypto_strings(3)> or, for SSL
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applications, L<SSL_load_error_strings(3)|SSL_load_error_strings(3)>
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first.
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If there is no text string registered for the given error code,
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the error string will contain the numeric code.
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L<ERR_print_errors(3)|ERR_print_errors(3)> can be used to print
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all error codes currently in the queue.
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=head1 RETURN VALUES
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ERR_error_string() returns a pointer to a static buffer containing the
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string if B<buf == NULL>, B<buf> otherwise.
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ERR_lib_error_string(), ERR_func_error_string() and
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ERR_reason_error_string() return the strings, and B<NULL> if
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none is registered for the error code.
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=head1 SEE ALSO
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L<err(3)|err(3)>, L<ERR_get_error(3)|ERR_get_error(3)>,
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L<ERR_load_crypto_strings(3)|ERR_load_crypto_strings(3)>,
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L<SSL_load_error_strings(3)|SSL_load_error_strings(3)>
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L<ERR_print_errors(3)|ERR_print_errors(3)>
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=head1 HISTORY
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ERR_error_string() is available in all versions of SSLeay and OpenSSL.
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=cut
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