userspace/init.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

#include <stdio.h>
#include <time.h>


int main(int argc, char **argv)
{

    char *argv1[]={"/bin/foolshell",0};
    char *env1[]={"PS1=\033[34m$\033[37m","PWD=/home/miguel","PATH=/bin","TERM=fool-term",0};

    time_t ltime;
    time(&ltime); 
    printf("fool-init: current time: %s", ctime(&ltime));

    // loop forever and spawn shells if the top-shell exits
    while(1)
    {

	int pid=_fork();

	int status;
	if(pid==0)
	{
	    _execve("/bin/foolshell",argv1,env1); // replace process with our foolshell :)
	    puts("FATAL ERROR: Something terrible happened. Unable to Execute SHELL!");
	    while(1);// hang
	}

	// wait until our child process state changes (exits)
	// and respawn SHELL 
	_wait(&status);
	
	printf("fool-init: catched exit of process %d.\n",pid);
	printf("fool-init: respawning a Fools Shell\n");
	
    }

    return 0;
}