Function handle_cmd

general/package/legacy/lshell/src/lshell.c:222–294

* @brief Parses and runs a string containing a cmd and optional parameters * * @param cmd_str * @return pid_t pid of process running command */

 * @return pid_t pid of process running command
 */
pid_t handle_cmd(char *cmd_str)
{
    pid_t res = 0;
    char *redirect = NULL;
    if (get_redirect_file(cmd_str, &redirect) != 0)
    {
        print_err();
        return 1;
    }

    char *cmd = NULL;
    cmd = strtok(cmd_str, " ");
    if (cmd == NULL)
    {
        return res;
    }

    char **args = (char **)malloc(sizeof(char *) * 2);
    args[0] = strdup(cmd);
    size_t args_n = 1;

    char *token = NULL;
    token = strtok(NULL, " ");
    while (token != NULL)
    {
        args[args_n] = (char *)malloc(sizeof(char) * strlen(token) + 1);
        strcpy(args[args_n++], token);

        args = (char **)realloc(args, (args_n + 1) * sizeof(char *));
        token = strtok(NULL, " ");
    }

    // null terminate the arg array
    args = realloc(args, (args_n + 1) * sizeof(char *));
    args[args_n++] = NULL;

    if (strcmp(cmd, "cd") == 0) // Check if commands are built-in commands
    {

        if (args_n != 3) // If there is less 2 args (program name[0] and directory[1]) cannot run
        {
            print_err();
            res = 0;
        }
        else
        {
            if (chdir(args[1]) == -1)
            {
                print_err();
            }
            res = 0;
        }
    }
    else if (strcmp(cmd, "path") == 0)
    {
        clear_paths();

        for (size_t i = 1; i < args_n - 1; i++) // -1 because arg array is null terminated