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info:development [2009/12/03 20:34] – restore failed mirroring moritzinfo:development [2011/08/23 14:42] (current) – [Restoring installed packages] moritz
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 set autoindent set autoindent
 </code> </code>
 +
 +===== Eclipse =====
 +For many applications, Eclipse is the best editor and IDE. See [[.:eclipse]] for more details.
  
 ===== C/C++ Development ===== ===== C/C++ Development =====
 To get help on C functions like ''printf'', install ''manpages-dev''. Having it installed, one can issue ''man printf'' on the console to get the function's description. To get help on C functions like ''printf'', install ''manpages-dev''. Having it installed, one can issue ''man printf'' on the console to get the function's description.
 +
 +[[c_global_local|Variables in C]]
  
 ==== Make ==== ==== Make ====
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 Example to disable a function call in a compiled application. Assume the binary is called ''prog'' and inside there is a call to a function that needs to be disabled. The tools required are ''objdump'', a hex editor and ''diff'' for correctness checking. Example to disable a function call in a compiled application. Assume the binary is called ''prog'' and inside there is a call to a function that needs to be disabled. The tools required are ''objdump'', a hex editor and ''diff'' for correctness checking.
   - Disassemble the whole program: <code>$ objdump -D prog > prog.s</code>   - Disassemble the whole program: <code>$ objdump -D prog > prog.s</code>
-  - Find the function call assuming it is in ''<main>'': <code>less prog.s</code> and search for ''main'': <code>/main</code> Something like this should appear: <code>080489a4 <main>:+  - Find the function call assuming it is in ''<main>'': <code>less prog.s</code> and search for ''main'': <code>/main</code> Something like this should appear: <code asm>080489a4 <main>:
  80489a4:       8d 4c 24 04             lea    0x4(%esp),%ecx  80489a4:       8d 4c 24 04             lea    0x4(%esp),%ecx
  80489a8:       83 e4 f0                and    $0xfffffff0,%esp  80489a8:       83 e4 f0                and    $0xfffffff0,%esp
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   - Now the code that needs to be replaced is identified, it is the byte sequence ''e8 40 0b 00 00''. Open a hex editor, and search for this sequence. It is not possible to map the addresses created by ''objdump'' to addresses in the binary file, that's why we just have to stick to do a plain search. Make sure that it is the right function call by checking that the surrounding bytes match the ones in the ''objdump'' output.   - Now the code that needs to be replaced is identified, it is the byte sequence ''e8 40 0b 00 00''. Open a hex editor, and search for this sequence. It is not possible to map the addresses created by ''objdump'' to addresses in the binary file, that's why we just have to stick to do a plain search. Make sure that it is the right function call by checking that the surrounding bytes match the ones in the ''objdump'' output.
   - Now replace ''e8 40 0b 00 00'' by ''90 90 90 90 90'', the Intel command for NOP.   - Now replace ''e8 40 0b 00 00'' by ''90 90 90 90 90'', the Intel command for NOP.
-  - To test if the patch was successful, use <code>$ objdump -D prog > prog.s2 +  - To test if the patch was successful, use <code bash>$ objdump -D prog > prog.s2 
-diff prog.s prog.s2</code> The output should be something like this: <code>+diff prog.s prog.s2</code> The output should be something like this: <code diff>
 <  8048a30:     e8 40 0b 00 00          call   8049575 <some_function> <  8048a30:     e8 40 0b 00 00          call   8049575 <some_function>
 --- ---
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 # generater a lost of installed packages # generater a lost of installed packages
 PKG_LST=$(aptitude search "~i !~M "|awk '{print $2","}'|tr -d "\n") PKG_LST=$(aptitude search "~i !~M "|awk '{print $2","}'|tr -d "\n")
 +DATE=-$(date +"%s")
  
 cat - <<EOF cat - <<EOF
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 Package: YOURNAME-environment Package: YOURNAME-environment
-Version: 1.0+Version: 1.0$DATE
 Maintainer: your name <user@host.tld> Maintainer: your name <user@host.tld>
 # Pre-Depends: <comma-separated list of packages> # Pre-Depends: <comma-separated list of packages>
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     This package depends on all packages I expect my system to have installed.     This package depends on all packages I expect my system to have installed.
 </code> </code>
 +
 +
 +===== Lotus Notes on Debian =====
 +At some point in time, Debian decided to rename libcupsys to libcups, breaking Note's dependencies. To make it run with the new library, create a dummy library libcupsys2 that depends on libcups2 and creates a symlink from libcups.so.2 to libcupsys.so.2.
  
info/development.1259872448.txt.gz · Last modified: by moritz
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