#include <tcl.h>
void Tcl_SetErrno(errorCode)
int Tcl_GetErrno()
char * Tcl_ErrnoId()
char * Tcl_ErrnoMsg()
()
- int errorCode (in)
-
A POSIX error code such as ENOENT.
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.
Tcl_ErrnoId() and Tcl_ErrnoMsg() return
a string
representation of the current errno value.
Tcl_ErrnoId()
returns a machine-readable textual identifier such as
"EACCES". Tcl_ErrnoMsg() returns a human-readable string
such as
"permission denied". The strings returned by these functions are
statically allocated and the caller must not free or modify them.
Windows 10. Windows Server 2016. Windows Server 2019. Windows 11. Windows Server 2022. Windows Server 2025.
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