The Ed package contains a spartan line editor.
Approximate build time: 0.1 SBU Required disk space: 3.1 MB |
Official download location for Ed (0.2):
ftp://ftp.gnu.org/gnu/ed/
And for the Ed Mkstemp Patch:
http://www.linuxfromscratch.org/patches/lfs/cvs/ed-0.2-mkstemp.patch
For its installation Ed depends on: Bash, Binutils, Coreutils, Diffutils, GCC, Glibc, Grep, Make, Sed.
Note: 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). The following patch makes Ed use mkstemp instead, which is the recommended way to create temporary files.
Apply the patch:
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 |
This package has a test suite available which can perform a number of checks to ensure it built correctly. Should you choose to run it, the following command will do so:
make check |
Install the package:
make install |
Installed programs: ed and red (link to ed)
ed is a line-oriented text editor. It can be used to create, display, modify and otherwise manipulate text files.
red is a restricted ed -- it can only edit files in the current directory and cannot execute shell commands.