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node.jssudo

node.js execute multiple commands with sudo

In my node.js script, I need to run these two commands with sudo:

execSync('sudo rsync -a ' + dir1 + " " + dir2);
execSync('sudo rm -Rf ' + dir1);

but this cause that it will ask for sudo password two times; other than this, if I digit a wrong password, the script goes on without requesting it again; how can I cache the password to avoid to be prompted for it two times and wait until the correct password is supplied before going on?

Solution

  • Following this piece of advice, I would also advise to just execute both commands under the same sudo command.

    execSync('sudo -- sh -c \'rsync -a ' + dir1 + ' ' + dir2 + ' && rm -Rf ' + dir1 + '\'');

    Detecting whether an error occurred can be done from execSync itself. It seems that an exception is thrown when stderr is not empty. I would have first suggested to check the command's exit code, but that library does not seem to expose it.