openssl/doc/man3/ERR_load_strings.pod

=pod

=head1 NAME

ERR_load_strings, ERR_PACK, ERR_get_next_error_library - load
arbitrary error strings

=head1 SYNOPSIS

 #include <openssl/err.h>

 int ERR_load_strings(int lib, ERR_STRING_DATA *str);

 int ERR_get_next_error_library(void);

 unsigned long ERR_PACK(int lib, int func, int reason);

=head1 DESCRIPTION

ERR_load_strings() registers error strings for library number B<lib>.

B<str> is an array of error string data:

 typedef struct ERR_string_data_st
 {
     unsigned long error;
     char *string;
 } ERR_STRING_DATA;

The error code is generated from the library number and a function and
reason code: B<error> = ERR_PACK(B<lib>, B<func>, B<reason>).
ERR_PACK() is a macro.

The last entry in the array is {0,0}.

ERR_get_next_error_library() can be used to assign library numbers
to user libraries at run time.

=head1 RETURN VALUES

ERR_load_strings() returns 1 for success and 0 for failure. ERR_PACK() returns the error code.
ERR_get_next_error_library() returns zero on failure, otherwise a new
library number.

=head1 SEE ALSO

L<ERR_load_strings(3)>

=head1 COPYRIGHT

Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.

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
L<https://www.openssl.org/source/license.html>.

=cut