Reading passphrase from an environment variable.

[John Mathew]

Hi,

Whenever I decrypt or encrypt using GPG it prompts for the passphrase.  I
would like to set the passphrase in a UNIX environment variable and every
time GPG should read from this variable. The idea is to run decryption and
encryption using shell scripts which does not require any prompting.

Eg:
export passphrase="test"

Suggestions are welcome.

Regards,
John