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-'\"
-'\" Copyright (c) 1996 Sun Microsystems, Inc.
-'\"
-'\" See the file "license.terms" for information on usage and redistribution
-'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-'\" 
-.TH Tcl_SetErrno 3 8.3 Tcl "Tcl Library Procedures"
-.so man.macros
-.BS
-.SH NAME
-Tcl_SetErrno, Tcl_GetErrno, Tcl_ErrnoId, Tcl_ErrnoMsg \- manipulate errno to store and retrieve error codes
-.SH SYNOPSIS
-.nf
-\fB#include <tcl.h>\fR
-.sp
-void
-\fBTcl_SetErrno\fR(\fIerrorCode\fR)
-.sp
-int
-\fBTcl_GetErrno\fR()
-.sp
-const char *
-\fBTcl_ErrnoId\fR()
-.sp
-const char *
-\fBTcl_ErrnoMsg\fR(\fIerrorCode\fR)
-.sp
-.SH ARGUMENTS
-.AS int errorCode
-.AP int errorCode in
-A POSIX error code such as \fBENOENT\fR.
-.BE
-
-.SH DESCRIPTION
-.PP
-\fBTcl_SetErrno\fR and \fBTcl_GetErrno\fR provide portable access
-to the \fBerrno\fR variable, which is used to record a POSIX error
-code after system calls and other operations such as \fBTcl_Gets\fR.
-These procedures are necessary because global variable accesses cannot
-be made across module boundaries on some platforms.
-.PP
-\fBTcl_SetErrno\fR sets the \fBerrno\fR variable to the value of the
-\fIerrorCode\fR argument
-C procedures that wish to return error information to their callers
-via \fBerrno\fR should call \fBTcl_SetErrno\fR rather than setting
-\fBerrno\fR directly.
-.PP
-\fBTcl_GetErrno\fR returns the current value of \fBerrno\fR.
-Procedures wishing to access \fBerrno\fR should call this procedure
-instead of accessing \fBerrno\fR directly.
-.PP
-\fBTcl_ErrnoId\fR and \fBTcl_ErrnoMsg\fR return string
-representations of \fBerrno\fR values.  \fBTcl_ErrnoId\fR
-returns a machine-readable textual identifier such as
-.QW EACCES
-that corresponds to the current value of \fBerrno\fR.
-\fBTcl_ErrnoMsg\fR returns a human-readable string such as
-.QW "permission denied"
-that corresponds to the value of its
-\fIerrorCode\fR argument.  The \fIerrorCode\fR argument is
-typically the value returned by \fBTcl_GetErrno\fR.
-The strings returned by these functions are
-statically allocated and the caller must not free or modify them.
-
-.SH KEYWORDS
-errno, error code, global variables