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LINK(2)			  FreeBSD System Calls Manual		       LINK(2)

NAME
     link -- make a hard file link

SYNOPSIS
     #include <unistd.h>

     int
     link(const	char *name1, const char	*name2);

DESCRIPTION
     The link()	function call atomically creates the specified directory entry
     (hard link) name2 with the	attributes of the underlying object pointed at
     by	name1.	If the link is successful: the link count of the underlying
     object is incremented; name1 and name2 share equal	access and rights to
     the underlying object.

     If	name1 is removed, the file name2 is not	deleted	and the	link count of
     the underlying object is decremented.

     Name1 must	exist for the hard link	to succeed and both name1 and name2
     must be in	the same file system.  name1 may not be	a directory.

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
     Link() will fail and no link will be created if:

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

     [ENAMETOOLONG]
		   A component of either pathname exceeded 255 characters, or
		   entire length of either path	name exceeded 1023 characters.

     [ENOENT]	   A component of either path prefix does not exist.

     [EOPNOTSUPP]  The file system containing the file named by	name1 does not
		   support links.

     [EMLINK]	   The link count of the file named by name1 would exceed
		   {LINK_MAX}.

     [EACCES]	   A component of either path prefix denies search permission.

     [EACCES]	   The requested link requires writing in a directory with a
		   mode	that denies write permission.

     [ELOOP]	   Too many symbolic links were	encountered in translating one
		   of the pathnames.

     [ENOENT]	   The file named by name1 does	not exist.

     [EEXIST]	   The link named by name2 does	exist.

     [EPERM]	   The file named by name1 is a	directory.

     [EXDEV]	   The link named by name2 and the file	named by name1 are on
		   different file systems.

     [ENOSPC]	   The directory in which the entry for	the new	link is	being
		   placed cannot be extended because there is no space left on

		   the file system containing the directory.

     [EDQUOT]	   The directory in which the entry for	the new	link is	being
		   placed cannot be extended because the user's	quota of disk
		   blocks on the file system containing	the directory has been
		   exhausted.

     [EIO]	   An I/O error	occurred while reading from or writing to the
		   file	system to make the directory entry.

     [EROFS]	   The requested link requires writing in a directory on a
		   read-only file system.

     [EFAULT]	   One of the pathnames	specified is outside the process's
		   allocated address space.

SEE ALSO
     readlink(2), symlink(2), unlink(2)

STANDARDS
     The link()	function call is expected to conform to	ISO/IEC	9945-1:1990
     (``POSIX.1'').

HISTORY
     A link() function call appeared in	Version	7 AT&T UNIX.

     The link()	system call traditionally allows the super-user	to link	direc-
     tories which corrupts the filesystem coherency.  This implementation no
     longer permits it.

4th Berkeley Distribution      January 12, 1994	     4th Berkeley Distribution

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

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