C PROGRAMMING

A simple shell (command interpreter)
#define TRUE 1!
/* declare cmd, params, envp, stat, prompt, readcmd */!
!
while (TRUE) { ! !!!/* repeat forever */!
!prompt(); ! !!!!/* display prompt */
!readcmd(cmd, params); /* read input from terminal*/!
!if (fork() != 0) {! !/* fork child process */!
! !/* parent code */!
! !waitpid(-1, &stat, 0); ! !/* wait for child */!
!} else {!
! !/* child code */!
! !execve(cmd, params, envp);!/* execute command */!
!}!
}!

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A simple shell (command interpreter)
#define TRUE 1!
/* declare cmd, params, envp, stat, prompt, readcmd */!
!
while (TRUE) { ! !!!/* repeat forever */!
!prompt(); ! !!!!/* display prompt */
!readcmd(cmd, params); /* read input from terminal*/!
!if (fork() != 0) {! !/* fork child process */!
! !/* parent code */!
! !waitpid(-1, &stat, 0); ! !/* wait for child */!
!} else {!
! !/* child code */!
! !execve(cmd, params, envp);!/* execute command */!
!}!
}!

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