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The directory `/etc/apt/verify.d` is used by `apt-verify(8)`.
Normally this directory contains symbolic links to executable files,
to make it easy for sysadmins to enable (ln -s) and disable (rm) each
tool, but it is permitted to put a executable directly in this
directory.
Programs are executed ordered by a sorted name, and if one program
fails, the remaining programs will never be invoked. Non-executable
files such as this README are ignored.
Apt parses GnuPG `gpgv(1)` outputs for signature verification status,
so you want to have a symbolic link `gpgv` in this directory pointing
to `/usr/bin/gpgv` or whatever `gpgv` you wish to use.
Apt ignores the exit code of these processes and only parse any GnuPG
`gpgv` outputs. So if you place a program whose name sort after
`gpgv`, exiting with non-zero is not sufficient to cause apt to fail.
For the above reasons, we suggest placing any non-gpgv programs you
wish to be run under symbolic links prefixed with digits, like this:
```
$ ls -la /etc/apt/verify.d/
total 16
drwxr-xr-x 2 root root 4096 Feb 7 17:57 .
drwxr-xr-x 10 root root 4096 Feb 7 17:24 ..
-rwxr-xr-x 1 jas jas 2065 Feb 7 17:57 10canary
-rw-r--r-- 1 root root 1385 Feb 7 17:57 README
lrwxrwxrwx 1 root root 13 Feb 7 17:24 gpgv -> /usr/bin/gpgv
$
```
Happy Hacking!
|
