As people have noted, BackupPC uses exec() for shell commands, not
system(). The main reason for that is security - it's easy to be sloppy
with system() and create unintended vulnerabilities.
However, it is still easy to be explicit about how the arguments are
grouped and passed to the command. Instead of using quotes, which won't
work, you can use a list instead of a simple string.
For example, to execute this command:
bash -c "touch /var/lock/backuppc/BackupPC; $sshPath -q -x -l root $host
touch /var/lock/backuppc/BackupPC"'
you should be able to do this:
$Conf{DumpPreUserCmd} = ['bin/bash', '-c', 'touch
/var/lock/backuppc/BackupPC; $sshPath -q -x -l root $host touch
/var/lock/backuppc/BackupPC'];
This should run /bin/bash with the two arguments.
Craig
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