https://wiki.nwl.cc/ 2026-05-16T08:58:48+00:00 https://wiki.nwl.cc/ https://wiki.nwl.cc/_media/wiki/dokuwiki.svg text/html 2016-12-15T08:05:48+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.nwl.cc/code/c?rev=1481789148&do=diff C Programming Here are some misc tips about programming in C. Interactive Subprocesses Correctly dealing with interactive subprocesses in Unix works best by using pseudo terminals. See here for details. text/html 2020-03-29T12:32:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.nwl.cc/code/debugging?rev=1585485148&do=diff Debugging Code The following page gives some examples of how to debug C code. GDB The Gnu DeBugger is a very powerful tool, but not easy to use. Beginners may first try insight, a very nice GDB-Gui. KGDB over Serial Console Debugging Kernel Modules text/html 2021-03-08T17:57:15+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.nwl.cc/code/nice_scripts?rev=1615226235&do=diff Nice Scripts Welcome to Shell Scripting! Parsing Configs The file.csv file content is : user0001;password0001;user0002;password0002 user0011;password0011;user0012;password0012 ... And the shell program is just : { while IFS=';' read u1 p1 u2 p2; do imapsync --user1 $u1 --password1 $p1 --user2 $u2 --password2 $p2 ... done ; } < file.csv text/html 2020-03-29T12:13:23+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.nwl.cc/code/profiling?rev=1585484003&do=diff Profiling A collection of code profiling techniques follows. Dynamic Memory Allocation Typical problems with dynamic memory management are: * leaks and * corruption. While the latter is rather tricky to analyse, for memleaks there is valgrind text/html 2007-07-08T23:24:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.nwl.cc/code/quilt?rev=1183937068&do=diff quilt(1) quilt is an excellent patch management utility. Especially upgrading a stack of many patches is often a pain in the ass. Using quilt all that matters are the right commands at the right time. :) Refreshing External Patches Not every project is using text/html 2006-07-16T19:44:44+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.nwl.cc/code/regular_expressions?rev=1153079084&do=diff SED Substrings Using Substrings, you can reuse parts of the expression to match for the replacement. This is a simple example: $ date Mon Jul 25 23:59:40 CEST 2005 $ date | sed -n 's/.*\ \(.*\)/\1/p' 2005 Important parts are: -n do not output anything not requested text/html 2006-07-24T21:05:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.nwl.cc/code/wrapper_scripts?rev=1153775100&do=diff When writing wrapper scripts, beware that when naming the wrapper the same as the binary itself, you must use the full path to the binary when using it inside the script, or else the wrapper will execute itself recursively!