#include <sys/types.h>

#include <unistd.h>

#include <stdio.h>

#include <stdlib.h>

#include <errno.h>

#include <string.h>

#include <signal.h>

#include <fcntl.h>

void status(int exitStatus, int killedBySig)

{

if (killedBySig == 0)

{

// last command not killed by signal

printf("exit value %d\n", exitStatus);

fflush(stdout);

}

else

{

// last command was killed by a signal

printf("terminated by signal %d\n", exitStatus);

fflush(stdout);

}

}

void cd(char *args[])

{

if (args[1] == NULL)

{

// no second arg provided, cd to home dir

if (chdir(getenv("HOME")) != 0)

{

perror("ERROR");

fflush(stderr);

}

}

else

{

// second arg privided, attempt to cd to given dir

if (chdir(args[1]) != 0)

{

perror("ERROR");

fflush(stderr);

}

}

return;

}