2.11BSD#431 - /usr/man/cat2/unlink.0

UNLINK(2)	    UNIX Programmer's Manual		UNLINK(2)


NAME
     unlink - remove directory entry

SYNOPSIS
     unlink(path)
     char *path;

DESCRIPTION
     Unlink removes the entry for the file path from its direc-
     tory.  If this entry was the last link to the file, and no
     process has the file open, then all resources associated
     with the file are reclaimed.  If, however, the file was open
     in any process, the actual resource reclamation is delayed
     until it is closed, even though the directory entry has
     disappeared.

RETURN VALUE
     Upon successful completion, a value of 0 is returned.  Oth-
     erwise, a value of -1 is returned and errno is set to indi-
     cate the error.

ERRORS
     The unlink succeeds unless:

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

     [EINVAL]	    The pathname contains a character with the
		    high-order bit set.

     [ENAMETOOLONG] A component of a pathname exceeded 255 char-
		    acters, or an entire path name exceeded 1023
		    characters.

     [ENOENT]	    The named file does not exist.

     [EACCES]	    Search permission is denied for a component
		    of the path prefix.

     [EACCES]	    Write permission is denied on the directory
		    containing the link to be removed.

     [ELOOP]	    Too many symbolic links were encountered in
		    translating the pathname.

     [EPERM]	    The named file is a directory and the effec-
		    tive user ID of the process is not the
		    super-user.

     [EPERM]	    The directory containing the file is marked
		    sticky, and neither the containing directory
		    nor the file to be removed are owned by the


Printed 11/26/99	  May 22, 1985				1


UNLINK(2)	    UNIX Programmer's Manual		UNLINK(2)


		    effective user ID.

     [EBUSY]	    The entry to be unlinked is the mount point
		    for a mounted file system.

     [EIO]	    An I/O error occurred while deleting the
		    directory entry or deallocating the inode.

     [EROFS]	    The named file resides on a read-only file
		    system.

     [EFAULT]	    Path points outside the process's allocated
		    address space.

SEE ALSO
     close(2), link(2), rmdir(2)


Printed 11/26/99	  May 22, 1985				2