This allows for creating dangling symlinks with force applied:
# Before:
$ ln -sf non-existant target
ln: stat non-existent: No such file or directory
$ ls -l target
ls: lstat target: No such file or directory
# After:
$ ln -sf non-existant target
$ ls -l target
lrwxrwxrwx 1 eu users 12 May 08 07:50 target -> non-existent
This also allows creating relative non-dangling symlinks with force applied:
touch existant; mkdir dir
# Before
$ ln -sf ../existant dir
ln: stat ../existant: No such file or directory
$ ls -l dir
# After
$ ln -sf ../existant dir
$ ls -l dir
lrwxrwxrwx 1 eu users 11 May 08 07:53 existant -> ../existant
The check for whether each src and to pairs are on the same device with the
same inode are only needed for hardlinks so that a forcefull link does
not remove the underlying file:
touch f; mkdir dir
# Before:
$ ln -f f f dir
ln: f and f are the same file
$ ls -i f dir/f
3670611 dir/f
3670611 f
# After:
$ ln -f f f dir
ln: f and f are the same file
$ ls -i f dir/f
4332236 dir/f
4332236 f
---
ln.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/ln.c b/ln.c
index b63e75c64b95..2bfdbbdeacc6 100644
--- a/ln.c
+++ b/ln.c
@@ -61,21 +61,20 @@ main(int argc, char *argv[])
for (; *argv; argc--, argv++) {
if (!hasto)
to = basename(*argv);
- if (fflag) {
+ if (!sflag) {
if (stat(*argv, &st) < 0) {
weprintf("stat %s:", *argv);
continue;
} else if (fstatat(dirfd, to, &tost,
AT_SYMLINK_NOFOLLOW) < 0) {
if (errno != ENOENT)
eprintf("stat %s:", to);
- } else {
- if (st.st_dev == tost.st_dev && st.st_ino ==
tost.st_ino) {
- weprintf("%s and %s are the same
file\n", *argv, *argv);
- continue;
- }
- unlinkat(dirfd, to, 0);
+ } else if (st.st_dev == tost.st_dev && st.st_ino ==
tost.st_ino) {
+ weprintf("%s and %s are the same file\n",
*argv, *argv);
+ continue;
}
}
+ if (fflag)
+ unlinkat(dirfd, to, 0);
if ((!sflag ? linkat(AT_FDCWD, *argv, dirfd, to, flags)
: symlinkat(*argv, dirfd, to)) < 0) {
weprintf("%s %s <- %s:", fname, *argv, to);
--
2.4.0
