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/*

shell emulation (currently incomplete)

*/

#include <sys/types.h>

#include <sys/wait.h>

#include <stdio.h>

#include <unistd.h>

#define TRUE 1

#define FALSE !TRUE

#define MAXLEN 100

int

main (void)

{

char s[MAXLEN];

while (TRUE)

{

printf ("%s ", "$");

fgets (s, MAXLEN, stdin);

/* printf ("%s", s); */

pid_t proc; /* process id */

int *status; /* waitpid status */

if ((proc = fork ()) != 0)

{

/* printf ("%s %u\n", "created process", proc); */

waitpid (-1, status, 0);

}

else

{

/* save the command and the arguments */

/* TODO: use getopts for the arguments */

char cmd[MAXLEN];

if (sscanf (s, "%s", cmd) > 0)

{

/* printf ("%s\n", cmd); */

char *const parm[] = { cmd, NULL };

execve (cmd, parm, 0);

}

}

}

return 0;

}