Tcl_SetErrno(3) Tcl (7.5) Tcl_SetErrno(3)
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NAME
Tcl_SetErrno, Tcl_GetErrno - manipulate errno to store and
retrieve error codes
SYNOPSIS
#include <tcl.h>
void
Tcl_SetErrno(errorCode)
int
Tcl_GetErrno()
ARGUMENTS
int errorCode (in) A POSIX error code such
as ENOENT.
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DESCRIPTION
Tcl_SetErrno and Tcl_GetErrno provide portable access to the
errno variable, which is used to record a POSIX error code
after system calls and other operations such as Tcl_Gets.
These procedures are necessary because global variable
accesses cannot be made across module boundaries on some
platforms.
Tcl_SetErrno sets the errno variable to the value of the
errorCode argument C procedures that wish to return error
information to their callers via errno should call
Tcl_SetErrno rather than setting errno directly.
Tcl_GetErrno returns the current value of errno. Procedures
wishing to access errno should call this procedure instead
of accessing errno directly.
KEYWORDS
errno, error code, global variables
Page 1 (printed 2/19/99)
