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✏️ Editing: ERR_PACK.3ssl

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.\" ========================================================================
.\"
.IX Title "ERR_load_strings 3"
.TH ERR_load_strings 3 "2019-12-20" "1.0.2u" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
ERR_load_strings, ERR_PACK, ERR_get_next_error_library \- load
arbitrary error strings
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/err.h>
\&
\& void 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);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBERR_load_strings()\fR registers error strings for library number \fBlib\fR.
.PP
\&\fBstr\fR is an array of error string data:
.PP
.Vb 5
\& typedef struct ERR_string_data_st
\& {
\&        unsigned long error;
\&        char *string;
\& } ERR_STRING_DATA;
.Ve
.PP
The error code is generated from the library number and a function and
reason code: \fBerror\fR = \s-1ERR_PACK\s0(\fBlib\fR, \fBfunc\fR, \fBreason\fR).
\&\s-1\fBERR_PACK\s0()\fR is a macro.
.PP
The last entry in the array is {0,0}.
.PP
\&\fBERR_get_next_error_library()\fR can be used to assign library numbers
to user libraries at runtime.
.SH "RETURN VALUE"
.IX Header "RETURN VALUE"
\&\fBERR_load_strings()\fR returns no value. \s-1\fBERR_PACK\s0()\fR return the error code.
\&\fBERR_get_next_error_library()\fR returns a new library number.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBerr\fR\|(3), \fBERR_load_strings\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fBERR_load_error_strings()\fR and \s-1\fBERR_PACK\s0()\fR are available in all versions
of SSLeay and OpenSSL. \fBERR_get_next_error_library()\fR was added in
SSLeay 0.9.0.

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