|LN(1)||General Commands Manual||LN(1)|
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lnutility creates a new directory entry (linked file) which has the same modes as the original file. It is useful for maintaining multiple copies of a file in many places at once without using up storage for the copies; instead, a link “points” to the original copy. There are two types of links: hard links and symbolic links. How a link points to a file is one of the differences between a hard and symbolic link. The options are as follows:
-Loption overrides any previous
-hfor compatibility with other operating systems.
-Poption overrides any previous
lnmakes “hard” links. A hard link to a file is indistinguishable from the original directory entry; any changes to a file are effectively independent of the name used to reference the file. Hard links may not normally refer to directories and may not span file systems. A symbolic link contains the name of the file to which it is linked. The referenced file is used when an open(2) operation is performed on the link. A stat(2) on a symbolic link will return the linked-to file; an lstat(2) must be done to obtain information about the link. The readlink(2) call may be used to read the contents of a symbolic link. Symbolic links may span file systems, refer to directories, and refer to non-existent files. Given one or two arguments,
lncreates a link to an existing file source. If target is given, the link has that name; target may also be a directory in which to place the link. Otherwise, it is placed in the current directory. If only the directory is specified, the link will be made to the last component of source. Given more than two arguments,
lnmakes links in directory to all the named source files. The links made will have the same name as the files being linked to.
lnutility exits 0 on success, and >0 if an error occurs. /home/www and point it to /var/www:
# ln -s /var/www /home/www
# ln /usr/local/bin/fooprog-1.0 /usr/local/bin/fooprog
$ ls -i /bin/[ 11553 /bin/[ $ ls -i /bin/test 11553 /bin/test
if [ ]construct. In the next example, the second call to
lnremoves the original foo and creates a replacement pointing to baz:
$ mkdir bar baz $ ln -s bar foo $ ln -shf baz foo
-hoption, this would instead leave foo pointing to bar and inside foo create a new symlink baz pointing to itself. This results from directory-walking. linkat(2), lstat(2), readlink(2), stat(2), symlink(2), symlink(7)
lnutility is compliant with the IEEE Std 1003.1-2008 (“POSIX.1”) specification. The flags [
lnutility appeared in Version 1 AT&T UNIX. chflags(1)).
|August 10, 2016||OpenBSD-current|