The Ed package contains a spartan line editor.
Approximate build time: 0.1 SBU Required disk space: 3.1 MB
Ed installation depends on: Bash, Binutils, Coreutils, Diffutils, GCC, Glibc, Grep, Make, Sed.
Ed isn't something which many people use. It's installed here because it can be used by the patch program if you encounter an ed-based patch file. This happens rarely because diff-based patches are preferred these days.
Ed normally uses the mktemp function to create temporary files in /tmp, but this function contains a vulnerability (see the section on Temporary Files in http://en.tldp.org/HOWTO/Secure-Programs-HOWTO/avoid-race.html). Apply the following patch to make Ed use mkstemp instead, a secure way to create temporary files:
patch -Np1 -i ../ed-0.2-mkstemp.patch
Now prepare Ed for compilation:
./configure --prefix=/usr --exec-prefix=""
The meaning of the configure option:
--exec-prefix="": This forces the programs to be installed into the /bin directory. Having the programs available there is useful in the event of the /usr partition being unavailable.
Compile the package:
make
To test the results, issue: make check.
Install the package:
make install