xv6-65oo2/sh.c

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#include "user.h"
#include "types.h"
#include "fs.h"
#include "fcntl.h"
char *args[100];
int
main(void)
{
char buf[128];
int pid;
while(1){
puts("$ ");
gets(buf, sizeof(buf));
if(buf[0] == '\0')
continue;
pid = fork();
if(pid == 0){
args[0] = buf;
args[1] = 0;
exec(buf, args);
printf(1, "%s: not found\n", buf);
exit();
}
if(pid > 0)
wait();
}
}