Hi ALL: I'm using gpg 1.4.10 to perform sign-verify processing. In general, two gpg commands will be used as following: 0. gpg --detach-sign file 1. gpg --verify file.sig file I notice that in the executing process of command 0, a passphrase will be required to be typed manually; and the return value in shell($?) of command 1 have the meanings : 0-verify successfully, 1-verify failed, 2-file opening failed; Now I want to invoke these 2 commands in C-program in order that the process can be excuted automatically, but I do not know how to implement. -- How can I input the passphrase for command 0 automatically? One way I know is to use gpg-agent, is it all right? And does gpg-agent 2.1.9 match with gpg 1.4.10? -- How can I get the return value of command 1? I have tried using "popen", it does not worked and seemed that the output of gpg does not be redirected to the pipe. Expect any suggestion. Best Regards!
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