readdir: Fix empty content for directories containing broken symlinks

[paulwkc]

When using resolve-symlinks option, directories containing broken symlinks in the output mount point are displayed with empty content.

For example, empty content :

$ mkdir -p a/b
$ touch a/b/c

# create a broken link:
$ ln -s ../d a/b

$ file a/b/*
a/b/c: empty
a/b/d: broken symbolic link to ../d

$ mkdir out
$ bindfs --resolve-symlinks a out

# empty output:
$ ls out/b
# remove d and try again:
$ rm a/b/d
$ ls out/b
c

$ fusermount -u out

Cause:

• In bindfs_readdir(), if a symlink is not resolved, the function stops processing the readdir immediately.

Solution:

• In the mentioned condition, continue to read stat for broken symlink and continue the readdir processing.

After the change, directory entries are correctly displayed:

$ mkdir -p a/b
$ touch a/b/c

# create a broken link:
$ ln -s ../d a/b

$ file a/b/*
a/b/c: empty
a/b/d: broken symbolic link to ../d

$ bindfs --resolve-symlinks a out

$ file out/b/*
out/b/c: empty
out/b/d: broken symbolic link to ../d

$ ls -aln */b/d
lrwxrwxrwx. 1 41136 10513 4 Oct  3 20:24 a/b/d -> ../d
lrwxrwxrwx. 1 41136 10513 4 Oct  3 20:24 out/b/d -> ../d

$ fusermount -u out

[mpartel]

Thanks!

[mpartel]

Released as 1.18.3