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Shell programming

Shell programming. 9/12/2008 David You. Using cross compiler. Cross compiler download and installation http://xinu.mscs.mu.edu/HOWTO:Build_XINU Log on to nickelback.cse.buffalo.edu

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Shell programming

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  1. Shell programming 9/12/2008 David You

  2. Using cross compiler • Cross compiler download and installation • http://xinu.mscs.mu.edu/HOWTO:Build_XINU • Log on to nickelback.cse.buffalo.edu • Make a proper directory for xinu project and copy the latest xinu source file from /web/faculty/bina/cse321/fall2008/NEXOS. • Unzip the source file (it would be gzip file or tar file) • gunzip < file.tar.gz | tar xvf – • tar xvf file.tar • Modify MIPS_ROOT variable in compile/makeVars file to • /projects/bina/NEXOS/CSE321/project/mipsel-dev/bin • Compile

  3. Shell programming • Shell programming guide line • http://xinu.mscs.mu.edu/Shell • Make a test program • xsh_test.c has a blank test function. • Implement something you want to do in the xsh_test.c file and just compile. • No need to do anything else. • Add a brand new command • Follow the procedures in the shell programming guide line webpage. • You have to put your source files into some proper directories and modify some files such as Makefile, shell.c and shell.h.

  4. Embedded XINU directories • Embedded XINU web site has documentation page explaining directory structure, data structure and relationship between source files. • http://xinu.mscs.mu.edu/docs/ • Just click and open any linked pages to see more about data structures and source files. • Most important directories are compile, shell and system.

  5. Test programs • Hello world • The simplest way is to modify the xsh_test.c file and compile. • You can add your own source file(xsh_hello.c or something) and add the command to proper position.

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