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UNLINK(2)		    BSD	System Calls Manual		     UNLINK(2)

NAME
     unlink -- remove directory	entry

SYNOPSIS
     #include <unistd.h>

     int
     unlink(const char *path);

DESCRIPTION
     The unlink() function removes the link named by path from its directory
     and decrements the	link count of the file which was referenced by the
     link.  If that decrement reduces the link count of	the file to zero, and
     no	process	has the	file open, then	all resources associated with the file
     are reclaimed.  If	one or more process have the file open when the	last
     link is removed, the link is removed, but the removal of the file is de-
     layed until all references	to it have been	closed.	 path may not be a di-
     rectory.

RETURN VALUES
     Upon successful completion, a value of 0 is returned.  Otherwise, a value
     of	-1 is returned and errno is set	to indicate the	error.

ERRORS
     The unlink() succeeds unless:

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

     [ENAMETOOLONG]  A component of a pathname exceeded	255 characters,	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.

     [EPERM]	     The directory containing the file is marked sticky, and
		     neither the containing directory nor the file to be re-
		     moved are owned by	the 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), symlink(7)

HISTORY
     An	unlink() function call appeared	in Version 6 AT&T UNIX.

     The unlink() system call traditionally allows the super-user to unlink
     directories which can damage the filesystem integrity.  This implementa-
     tion no longer permits it.

4th Berkeley Distribution	 June 4, 1993	     4th Berkeley Distribution

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | HISTORY

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