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

NAME
     unlink -- remove directory	entry

LIBRARY
     Standard C	Library	(libc, -lc)

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
     The unlink() function returns the value 0 if successful; otherwise	the
     value -1 is returned and the global variable 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 translat-
			ing 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 removed 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 en-
			try 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.

BSD				 June 4, 1993				   BSD

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

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