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Linux 2.6 - man page for fdetach (linux section 3posix)

FDETACH(P)			    POSIX Programmer's Manual			       FDETACH(P)

NAME
       fdetach - detach a name from a STREAMS-based file descriptor (STREAMS)

SYNOPSIS
       #include <stropts.h>

       int fdetach(const char *path);

DESCRIPTION
       The  fdetach()  function  shall	detach a STREAMS-based file from the file to which it was
       attached by a previous call to fattach().  The path argument points to the pathname of the
       attached  STREAMS  file.  The process shall have appropriate privileges or be the owner of
       the file. A successful call to fdetach() shall cause 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 shall 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  shall  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 suc-
       cessful	call  to  fdetach()  shall  be	equivalent  to performing the last close() on the
       attached file.

RETURN VALUE
       Upon successful completion, fdetach() shall return 0; otherwise, it shall  return  -1  and
       set errno to indicate the error.

ERRORS
       The fdetach() function shall fail if:

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

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

       ELOOP  A loop exists in symbolic links encountered during resolution of the path argument.

       ENAMETOOLONG
	      The  size  of  a pathname exceeds {PATH_MAX} or a pathname component is longer than
	      {NAME_MAX}.

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

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

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

       The fdetach() function may fail if:

       ELOOP  More  than  {SYMLOOP_MAX}  symbolic links were encountered during resolution of the
	      path argument.

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

       The following sections are informative.

EXAMPLES
   Detaching a File
       The  following  example detaches the STREAMS-based file /tmp/named-STREAM from the file to
       which it was attached by a previous, successful call to	fattach().  Subsequent	calls  to
       open this file refer to the underlying file, not to the STREAMS file.

	      #include <stropts.h>
	      ...
		  char *filename = "/tmp/named-STREAM";
		  int ret;

		  ret = fdetach(filename);

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       fattach() , the Base Definitions volume of IEEE Std 1003.1-2001, <stropts.h>

COPYRIGHT
       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information Technology  --  Portable	Operating  System
       Interface  (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
       the Institute of Electrical and Electronics Engineers, Inc and  The  Open  Group.  In  the
       event  of  any  discrepancy  between this version and the original IEEE and The Open Group
       Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				       FDETACH(P)


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