need help in implementing simple interactive shell in C

Applications Programming
1

hello all,

i hv attached herewith my program to implement a simple interactive shell in C. no matter hw hard I try, I keep getting some errors. i need help - urgently !!

proj1test7.c: In function `parseCommand':
proj1test7.c:102: warning: assignment makes pointer from integer without a cast
proj1test7.c: In function `main':
proj1test7.c:119: warning: passing arg 1 of `parsePath' from
incompatible pointer type
proj1test7.c:125: warning: passing arg 2 of `lookupPath' from
incompatible pointer type

Also, could you please let me know as to how can I compile and run a
program using Emacs? I had been trying to use putty and gcc to compile
my code, but it doesnt recognize strsep() and I am not very comfortable
using strtok in its place. But when I compile it using gcc on the Linux Whitebox, it works fine.

Also, if it does manage to get compiled, I keep getting Segmentation fault!

Please respond ASAP! Thanking you for your time in advance.

  • Nix
2

The actual shell on unix or other unix based OS simply forks oneach command input.
So that your programm also get command line input fork() the parent than exec() the command.
Simple example you can find on R.Stevens book Andvanced programming on Unix Environment.
Best of the lucks.

3

And please note that homework/classwork is against the Rules - thread closed.