static void test_redirect()
{
check_redirect(STDOUT_FILENO, STDERR_FILENO, "message");
check_redirect(STDERR_FILENO, STDOUT_FILENO, "message");
check_redirect(4, 5, "message");
check_redirect(10, 20, "message");
}
int main(int argc, char *argv[]) {
//Checks that only ./whoosh is entered to invoke shell
if(argc != 1) {
error_msg();
exit(1);
}
int CHAR_LIMIT = 129;
int BUFFER_LIMIT = 1024;
char buffer[BUFFER_LIMIT];
int path_num = 1;
char* s_path[BUFFER_LIMIT];
s_path[0] = "/bin";
while(1) {
printf("whoosh> ");
fflush(stdout);
fgets(buffer, sizeof(buffer), stdin);
get_line(buffer);
int line_size = strlen(buffer);
if(line_size > CHAR_LIMIT) {
error_msg();
continue;
}
//Get num of args in command
int num_args = count_args(buffer);
if(num_args != 0) {
char* myargv[num_args + 1];
int r_count = 0;
int last_r = 0;
char* r_path = NULL;
int i;
char buf[PATH_MAX + 1];
char *cwd;
char *r_output;
//Put each argument in myargv array
get_args(buffer, myargv, num_args);
//Check for redirect
check_redirect(myargv, num_args, &r_count, &last_r);
//Redirect error handling
if(r_count > 1) {
error_msg();
continue;
}
else if (r_count == 1) {
if(last_r != num_args - 2) {
error_msg();
continue;
}
if(myargv[num_args - 1][0] == '/') {
if(chdir(myargv[num_args - 1]) == 0) {
r_path = strdup(myargv[num_args - 1]);
}
else {
error_msg();
continue;
}
}
r_output = malloc(strlen(myargv[num_args - 1]) + strlen(".out"));
sprintf(r_output, "%s", myargv[num_args - 1]);
//Take off > and path from arguments
num_args = num_args - 2;
}
//Set last element in myargv array to NULL
myargv[num_args] = NULL;
//Check if exit was entered
check_exit(myargv);
//Check if any built-in commands were called
if(check_built_in(myargv, num_args, s_path, &path_num) == 0) {
continue;
}
else{
int file_exist = 0;
cwd = getcwd(buf, PATH_MAX + 1);
for(i=0; i<path_num; i++) {
chdir(s_path[i]);
struct stat path_buff;
if(stat(myargv[0], &path_buff) == 0) {
file_exist = 1;
char *exec_path = malloc(strlen(s_path[i]) + strlen("/") + strlen(myargv[0]) + 1);
sprintf(exec_path, "%s/%s", s_path[i], myargv[i]);
myargv[0] = exec_path;
chdir(cwd);
break;
}
}
if(file_exist == 0) {
error_msg();
continue;
}
else {
exec_cmd(myargv, r_output, r_path, r_count);
}
}
}
}
}
