215 lines
6.4 KiB
Groff
215 lines
6.4 KiB
Groff
.\" $NetBSD: ERR_error_string.3,v 1.10 2002/08/09 16:15:38 itojun Exp $
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.\" Sat Aug 10 00:56:37 2002
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.\" ======================================================================
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.\"
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.IX Title "ERR_error_string 3"
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.TH ERR_error_string 3 "0.9.6g" "2001-04-12" "OpenSSL"
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.UC
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.SH "NAME"
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ERR_error_string, ERR_error_string_n, ERR_lib_error_string,
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ERR_func_error_string, ERR_reason_error_string \- obtain human-readable
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error message
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.SH "LIBRARY"
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libcrypto, -lcrypto
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/err.h>
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.Ve
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.Vb 2
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\& char *ERR_error_string(unsigned long e, char *buf);
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\& char *ERR_error_string_n(unsigned long e, char *buf, size_t len);
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.Ve
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.Vb 3
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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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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fIERR_error_string()\fR generates a human-readable string representing the
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error code \fIe\fR, and places it at \fIbuf\fR. \fIbuf\fR must be at least 120
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bytes long. If \fIbuf\fR is \fB\s-1NULL\s0\fR, the error string is placed in a
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static buffer.
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\&\fIERR_error_string_n()\fR is a variant of \fIERR_error_string()\fR that writes
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at most \fIlen\fR characters (including the terminating 0)
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and truncates the string if necessary.
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For \fIERR_error_string_n()\fR, \fIbuf\fR may not be \fB\s-1NULL\s0\fR.
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.PP
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The string will have the following format:
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.PP
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.Vb 1
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\& error:[error code]:[library name]:[function name]:[reason string]
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.Ve
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\&\fIerror code\fR is an 8 digit hexadecimal number, \fIlibrary name\fR,
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\&\fIfunction name\fR and \fIreason string\fR are \s-1ASCII\s0 text.
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.PP
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\&\fIERR_lib_error_string()\fR, \fIERR_func_error_string()\fR and
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\&\fIERR_reason_error_string()\fR return the library name, function
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name and reason string respectively.
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.PP
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The OpenSSL error strings should be loaded by calling
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ERR_load_crypto_strings(3) or, for \s-1SSL\s0
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applications, 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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.PP
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ERR_print_errors(3) can be used to print
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all error codes currently in the queue.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fIERR_error_string()\fR returns a pointer to a static buffer containing the
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string if \fIbuf\fR \fB== \s-1NULL\s0\fR, \fIbuf\fR otherwise.
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.PP
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\&\fIERR_lib_error_string()\fR, \fIERR_func_error_string()\fR and
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\&\fIERR_reason_error_string()\fR return the strings, and \fB\s-1NULL\s0\fR if
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none is registered for the error code.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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openssl_err(3), ERR_get_error(3),
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ERR_load_crypto_strings(3),
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SSL_load_error_strings(3)
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ERR_print_errors(3)
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.SH "HISTORY"
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.IX Header "HISTORY"
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\&\fIERR_error_string()\fR is available in all versions of SSLeay and OpenSSL.
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\&\fIERR_error_string_n()\fR was added in OpenSSL 0.9.6.
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