FDETACH(3C) Standard C Library Functions FDETACH(3C)

NAME

fdetach - detach a name from a STREAMS-based file descriptor

SYNOPSIS

#include <stropts.h>

int fdetach(const char *path);

DESCRIPTION

The fdetach() function detaches a STREAMS-based file from the file to
which it was attached by a previous call to fattach(3C). The path
argument points to the pathname of the attached STREAMS file. The process
must have appropriate privileges or be the owner of the file. A
successful call to fdetach() causes all pathnames that named the attached
STREAMS file to again name the file to which the STREAMS file was
attached. All subsequent operations on path will operate on the
underlying file and not on the STREAMS file.


All open file descriptions established while the STREAMS file was
attached to the file referenced by path, will still refer to the STREAMS
file after the fdetach() has taken effect.


If there are no open file descriptors or other references to the STREAMS
file, then a successful call to fdetach() has the same effect as
performing the last close(2) on the attached file.

RETURN VALUES

Upon successful completion, fdetach() returns 0. Otherwise, it returns -1
and sets errno to indicate the error.

ERRORS

The fdetach() function will fail if:

EACCES
Search permission is denied on a component of the path
prefix.


EPERM
The effective user ID is not the owner of path and the
process does not have appropriate privileges.


ENOTDIR
A component of the path prefix is not a directory.


ENOENT
A component of path does not name an existing file or
path is an empty string.


EINVAL
The path argument names a file that is not currently
attached.


ENAMETOOLONG
The size of a pathname exceeds PATH_MAX, or a pathname
component is longer than NAME_MAX while _POSIX_NO_TRUNC
is in effect.


ELOOP
Too many symbolic links were encountered in resolving
path.


The fdetach() function may fail if:

ENAMETOOLONG
Pathname resolution of a symbolic link produced an
intermediate result whose length exceeds PATH_MAX.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-----------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+

SEE ALSO

close(2), fattach(3C), streamio(4I), attributes(7), standards(7),
fdetach(8)


STREAMS Programming Guide

July 24, 2002 FDETACH(3C)