LINK(2)
NAME
link − make a hard link to a file
USAGE
link(name1, name2) char *name1, *name2;
DESCRIPTION
Link creates a hard link to name1; the new link takes the name name2. Name1 must exist before the call to link is made.
Both name1 and name2 must be in the same file system. On DOMAIN Systems, name1 cannot be a directory. Both the old and the new link have the same rights to the underlying object.
RETURN VALUE
A successful call returns zero. A failed call returns -1 and sets errno as indicated below.
ERRORS
Link will fail and no link will be created if one or more of the following is true:
[EPERM] Either pathname contains a byte with the high-order bit set.
[ENOENT] Either pathname is too long.
[ENOTDIR] A component of either path prefix is not a directory.
[ENOENT] A component of either path prefix does not exist.
[EACCES] A component of either path prefix denies search permission.
[ENOENT] The file named by name1 does not exist.
[EEXIST] The link named by name2 already exists.
[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.
[EACCES] The requested link requires writing in a directory mode that denies write permission.
[EROFS] The requested link requires writing in a directory on a read-only file system.
[EFAULT] One of the pathnames specified lies outside the process’s allocated address space.
[ELOOP] The call encountered too many symbolic links in translating the pathname.