I need to expand some shell code so it would be able to do more than it is doing now. Currently it can do stuff like quit when q is pressed, display a prompt but not much more. I have to make the shell have capabilities like
cd (changing directories)
redirection of input and output, for example date > storeddate.txt
pipelines, for example ps -ax | grep programname
background processes, for example gcc -c verylargeprogram.c
this has to be done under a POSIX 1 compliant system.
Do you guys use any tool to design shell scripts?. My requirement is to simplify the logic/design of shell scripts before you actually write it.
In other words i need to put the design i have in mind to words before i start writing it.
Thanks in advance. (3 Replies)
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I want to know what a kernel is? what are its functions and uses.
what is a unix kernel?
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