interactive shell script for execution of sudo commands

Question

I installed gcc 5.2 with gmp, mpfr and mpc, plus the isl and cloog optimizations, works perfectly. All prefixes are in /usr/local so that I have to sudo my make install 's. I had to redo the same install on the computer of a friend, and now, I have to do it on another computer of mine... It's enough, so that I wrote a script. (And broke my "script whatever you have to do twice" rule.) My problem is that at some places of the script I have sudo make install commands, and that I don't want to run my script as admin.

How could I modify my script so that the following happens : before each sudo make install command one is asked to elevate permissions, and if one accepts, one is asked the root password, and then, sudo make install is executed, and after, the next commands are executed with "normal" permissions, until the next sudo make install , etc... ?

(I tagged make but the question is of course independant of it.)

Answer 1

sudo doesn't ask you for the root password, but your own; and it only does this when you haven't sudoed recently enough.

So just put sudo : at the top of the script: then it will ask for the password right away, and after it has been supplied, all the other sudo commands will execute without asking anything.