NAME

ERR_raise, ERR_raise_data, ERR_put_error, ERR_add_error_data, ERR_add_error_vdata, ERR_add_error_txt, ERR_add_error_mem_bio - record an error

SYNOPSIS

 #include <openssl/err.h>
 
 void ERR_raise(int lib, int reason);
 void ERR_raise_data(int lib, int reason, const char *fmt, ...);
 
 void ERR_add_error_data(int num, ...);
 void ERR_add_error_vdata(int num, va_list arg);
 void ERR_add_error_txt(const char *sep, const char *txt);
 void ERR_add_error_mem_bio(const char *sep, BIO *bio);

Deprecated since OpenSSL 3.0:

 void ERR_put_error(int lib, int func, int reason, const char *file, int line);

DESCRIPTION

ERR_raise() adds a new error to the thread's error queue. The error occurred in the library lib for the reason given by the reason code. Furthermore, the name of the file, the line, and name of the function where the error occurred is saved with the error record.

ERR_raise_data() does the same thing as ERR_raise(), but also lets the caller specify additional information as a format string fmt and an arbitrary number of values, which are processed with ERR_load_strings(3) can be used to register error strings so that the application can a generate human-readable error messages for the error code.

Reporting errors

Each sub-library has a specific macro XXXerr() that is used to report errors. Its first argument is a function code XXX_F_..., the second argument is a reason code XXX_R_.... Function codes are derived from the function names; reason codes consist of textual error descriptions. For example, the function ssl3_read_bytes() reports a "handshake failure" as follows:

 SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);

Function and reason codes should consist of uppercase characters, numbers and underscores only. The error file generation script translates function codes into function names by looking in the header files for an appropriate function name, if none is found it just uses the capitalized form such as "SSL3_READ_BYTES" in the above example.

The trailing section of a reason code (after the "_R_") is translated into lowercase and underscores changed to spaces.

Although a library will normally report errors using its own specific XXXerr macro, another library's macro can be used. This is normally only done when a library wants to include ASN1 code which must use the ASN1err() macro.

RETURN VALUES

ERR_raise(), ERR_put_error(), ERR_add_error_data(), ERR_add_error_vdata() ERR_add_error_txt(), and ERR_add_error_mem_bio() return no values.

NOTES

ERR_raise() and ERR_put_error() are implemented as macros.

COPYRIGHT

Licensed under the Apache License 2.0 (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.

OpenSSL.vip

Cryptography and SSL/TLS Toolkit