#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include <string.h>

struct command {
    char *prog;
    char **args;
};

int main(int argc, char *argv[])
{
    char *path = "/bin/";

    while (1) {

        char input[512];
        printf("$sshell ");

        scanf("%s", input);

        if (strcmp(input, "exit") == 0) {
            exit(0);
        } else {

            char *cmd = malloc(strlen(path) + strlen(input) + 1);

            if (cmd == NULL) {
                printf("Malloc failed.\n");
                exit(69);
            }

            strcat(cmd, path);
            strcat(cmd, input);
            printf("%s\n", cmd);

            char *args[] = {cmd, NULL};
            pid_t PID = fork();


            if (PID == 0) {
                int status;
                status = execvp(cmd, args);
                if (status != 0) {
                    fprintf(stderr, "Error: command not found.\n");
                    exit(42);
                } else {
                    exit(0);
                }
            } else {
                int status;
                wait(&status);
                fprintf(stderr, "+ completed '%s %s' [%d]\n", path, args[1], WEXITSTATUS(status));
            }
        }
    }
    return EXIT_SUCCESS;
}