I can make the command line method work with gpg homedir chmod 777, but how unsafe is that?

What means unsafe?

chmod 777 says 

rwxrwxrwx (symbolic)
User: read, write and execute
Group: read, write and execute
Others: read, write and execute

Is that unsafe? Are you the only user of this webserver?

Maybe you want to set up https://httpd.apache.org/docs/2.2/suexec.html

In reply to Re^3: CGI and GPG, how are you people doing it? by Anonymous Monk
in thread CGI and GPG, how are you people doing it? by aboboras

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