I have a long and long-running bash script where a handful of commands need to be run as root while the majority of commands need to be run as the regular user before sudo, because it would mess up file ownership and such.
I came up with some methods, but each of them have some problems
Method 1: Using sudo inside the file
#!/bin/bash sudo echo "I must be run by root" touch needsToBeOwnedByUser1 echo "needs to be run by user" sleep 1000 sudo echo "I, again, must be run by root"
This would look good, from the way the code is written.
sudo is written before the few statements that actually need to be run by root, but if the time between each
sudo call is too long
sudo again asks for a password. Also, if the first execution of
sudo fails, e.g. due to an invalid password, the rest of the script is still executed.
Method 2: using sudo to call the file and then change back to the original user when needed
#!/bin/bash echo "I must be run by root" su username -c 'touch needsToBeOwnedByUser1' su username -c 'echo "needs to be run by user"' su username -c 'sleep 1000' echo "I, again, must be run by root"
This also sucks, because I need to add
su username -c in front of almost every line. Also finding the original username after
sudo is possible, but cumbersome.
Is there a better way?
Edit: I only posted small, nonsensical scripts here to show what I am talking about. In the actual script I have some lines that need sudo (starting and stopping services), some lines where it does not matter if there is sudo and quite a lot of lines that really need to be run without sudo.