In this assignment, you will write a complete C program that will act as a simple command-line interpreter (i.e., a shell) for the Linux kernel. In writing your shell, you are expected to use the fork-exec-wait model discussed in class. In particular, you are to implement the following: Loop continuously until the user enters quit, which exits your shell. Inside the loop, you will print your minor5 prompt and read in the users command, which may consist of a Linux command with 0 or more options and arguments supported by the command. You are expected to read in and process only 1 command at a time with no pipelining or redirection. In a child process, you are to execute the command as given, including all options and arguments given. If the command is not valid, rather than display an exec failed message as shown in class examples, you will simply print out the command itself with command not found as shown in the SAMPLE OUTPUT and then exit the child process. The parent process should wait for the child process to finish. If you have any questions about this, please contact your instructor, TAs, or IAs assigned to this course to ensure you understand these directions.

SAMPLE OUTPUT (user input shown in bold): $ ./a.out minor5> ls a.out grades.txt rec01.txt testdir phone.txt route.txt who.txt du.txt rec01.c file1 rec01sol.c minor5.c minor5> ls -a -l -t total 144 -rwx------ 1 cat0299 cat0299 7835 Oct 14 17:39 a.out drwx------ 4 cat0299 cat0299 4096 Oct 14 17:39 . -rw------- 1 cat0299 cat0299 2665 Oct 14 17:39 minor5.c -rw------- 1 cat0299 cat0299 33 Oct 5 03:30 du.txt -rw------- 1 cat0299 cat0299 33 Oct 5 01:28 file1 -rw------- 1 cat0299 cat0299 333 Oct 5 01:02 route.txt