FDETACH(3P)               POSIX Programmer's Manual              FDETACH(3P)

PROLOG         top

       This manual page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior), or
       the interface may not be implemented on Linux.

NAME         top

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

SYNOPSIS         top

       #include <stropts.h>

       int fdetach(const char *path);

DESCRIPTION         top

       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 successful call to fdetach() shall be equivalent
       to performing the last close() on the attached file.

RETURN VALUE         top

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

ERRORS         top

       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.

              The length of a component of a pathname is longer than

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

              A component of the path prefix names an existing file that is
              neither a directory nor a symbolic link to a directory, or the
              path argument contains at least one non-<slash> character and
              ends with one or more trailing <slash> characters and the last
              pathname component names an existing file that is neither a
              directory nor a symbolic link to a directory.

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

       The fdetach() function may fail if:

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

              The length of a pathname exceeds {PATH_MAX}, or pathname
              resolution of a symbolic link produced an intermediate result
              with a length that exceeds {PATH_MAX}.

       The following sections are informative.

EXAMPLES         top

   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 *pathname = "/tmp/named-STREAM";
               int ret;

               ret = fdetach(pathname);



RATIONALE         top



       The fdetach() function may be removed in a future version.

SEE ALSO         top


       The Base Definitions volume of POSIX.1‐2008, stropts.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) 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 original
       Standard can be obtained online at .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the
       source files to man page format. To report such errors, see .

IEEE/The Open Group                 2013                         FDETACH(3P)

Pages that refer to this page: stropts.h(0p)close(3p)fattach(3p)