[systemd-devel] Impossible to enable instantiated symlink (foo at bar)

[Andrei Borzenkov]

If foo at bar.service symlink is present, it is impossible to enable it:

bor at opensuse:~> ll /run/systemd/system
итого 8
lrwxrwxrwx 1 root root   32 авг 18 21:06 foo at bar.service -> /run/systemd/system/foo at .service
-rwxr-xr-x 1 root root 1032 авг 18 21:06 foo at .service
bor at opensuse:~> sudo systemctl enable foo at bar.service
Failed to issue method call: No such file or directory
bor at opensuse:~> 

The problem is, unit_file_search() is called with allow_symlink=false
when used in enable codepath, which means that every attempt to open
will end up wither in ELOOP or ENOENT. At the end it exits with the
last error (ENOENT in this case, but this obviously depends on in which
directory symlink is created).

Is it really intentional? I'm actually all for disallowing such
symlinks :) but in this case at least meaningful error message is
required.