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In Part I we discussed about the fork system call and its caveats. In this post, we shall explore how to execute commands. Exec This brings us to the exec family of functions. Namely, it has the following functions: execl execv execle execve execlp execvp For our needs, we will use execvp whose signature looks like this: int execvp(const char *file, char *const argv[]); The vp in the name of the f
One of the projects that I am exploring at RC, is writing a UNIX shell. This is the first part of a series of posts that will eventually follow. Disclaimer: I am not a subject expert on writing shells and I am sharing my findings as I learn more about this myself. What is a shell? A lot has been written about this, so I will not go into too much detail about the definition. However, in one line -
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