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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.

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:

     [EACCES]		Search permission is denied for	a component of the
			path prefix, or	write permission is denied on the di-
			rectory	containing the link to be removed.

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

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

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

     [ELOOP]		Too many symbolic links	were encountered in translat-
			ing the	pathname.

     [ENAMETOOLONG]	A component of a pathname exceeded {NAME_MAX} charac-
			ters, or an entire path	name exceeded {PATH_MAX} char-
			acters.

     [ENOENT]		The named file does not	exist.

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

     [EPERM]		The named file is a directory and the effective	user
			ID of the process is not the super-user, the file sys-
			tem containing the file	does not permit	the use	of
			unlink() on a directory, or 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.

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

SEE ALSO
     close(2), link(2),	rmdir(2), symlink(7)

STANDARDS
     The unlink() function conforms to ISO/IEC 9945-1:1990 ("POSIX.1").

HISTORY
     An	unlink() function call appeared	in Version 2 AT&T UNIX.

BSD				 April 3, 2010				   BSD

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

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