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UNLINK(2)		  FreeBSD 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() system call removes the link named by	path from its direc-
     tory 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
     delayed until all references to it	have been closed.  The path argument
     may not be	a directory.

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 named file has its immutable or append-only	flag
			set, see the chflags(2)	manual page for	more informa-
			tion.

     [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
			entry or deallocating the inode.

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

     [EFAULT]		The path argument points outside the process's allo-
			cated address space.

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

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

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

FreeBSD	9.3		       February	23, 2005		   FreeBSD 9.3

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

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