Tcl Library Procedures
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.
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
Last change: 7.5
[ tcl8.0a1 | tk8.0a1 | X-ref ]
Copyright © 1989-1994 The Regents of the University of California.
Copyright © 1994-1996 Sun Microsystems, Inc.