NAME
link - make a hard link to a file

SYNOPSIS
link(name1, name2)
char *name1, *name2;

DESCRIPTION
A hard link to name1 is created; the link has the name name2.
Name1 must exist.

With hard links, both name1 and name2 must be in the same file
system. Unless the caller is the super-user, name1 must not be a
directory. Both the old and the new link share equal access and
rights to the underlying object.

NOTES
Macintosh file systems do not support hard links, so MachTen
creates symbolic links instead. Hard links can still be created on
NFS mounted file systems, provided the mounted file system supports
hard links.

RETURN VALUE
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 one or more of the
following are true:

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

[EINVAL] Either pathname contains a character with the high-
order bit set.

[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.

[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 and the
effective user ID is not super-user.

[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
symlink(2), unlink(2)