Write c program minishell that goes into an infinite

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Reference no: EM133423612

Question: Write C program minishell (ms$) that goes into an infinite loop waiting for user's commands. Once a command is entered, the program should assemble and execute each command using fork(), exec() and other system calls as required with the following rules and conditions.

Rule 1: The argc of any individual command or program should be >=1 and < =6

ms$ ls -1 ~/chapter2 -S -n //valid

ms$ cat new.txt //valid

Rule 2: The argc of induvial commands or programs that are used along with the special characters listed below should be >=1 and <=6

Ex: ms$ ls -1 ~/chapter2 -S -n | wc -w //the first command has argc=5 and the second command has argc=2 which are used along with the special | character

Special Characters : The program should handle the following special characters (In accordance to Rule 2 and the additional rules listed below)

| Piping (up to 5 piping operations should be supported)

Ex ms$ cat ex1.c|grep std|wc| wc -w

// Every command/program can have argc >=1 and <=6 as per Rule 2

>, <, >> Redirection

Ex: ms$ ls -1 >>dislist.txt

&& Conditional Execution // upto 5 conditional execution operators should be supported and could possibly be a combination of && and ||

Ex : ms$ ex1 && ex2 && ex3 && ex4 && ex5 ?

ms$ c1 && c2 || c3 && c4

|| Conditional Execution // see &&

& Background Processing

ms$ ex1 & //should run ex1 in the background

; Sequential execution of commands (up to 5 commands) the argc of each command should be >=1 and <=6 as per Rule 1

Ex: ms$ cat e1.txt; cat e2.txt ; ls ; date

Should use fork() and exec() along with other pertinent system calls to run commands from minishell

Reference no: EM133423612

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