run.c

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#include "cscshell.h"


// COMPLETE
int cd_cscshell(const char *target_dir){
    if (target_dir == NULL) {
        char user_buff[MAX_USER_BUF];
        if (getlogin_r(user_buff, MAX_USER_BUF) != 0) {
           perror("run_command");
           return -1;
        }
        struct passwd *pw_data = getpwnam((char *)user_buff);
        if (pw_data == NULL) {
           perror("run_command");
           return -1;
        }
        target_dir = pw_data->pw_dir;
    }

    if(chdir(target_dir) < 0){
        perror("cd_cscshell");
        return -1;
    }
    return 0;
}


int *execute_line(Command *head){
    #ifdef DEBUG
    printf("\n***********************\n");
    printf("BEGIN: Executing line...\n");
    #endif

    #ifdef DEBUG
    printf("All children created\n");
    #endif

    // Wait for all the children to finish

    #ifdef DEBUG
    printf("All children finished\n");
    #endif

    #ifdef DEBUG
    printf("END: Executing line...\n");
    printf("***********************\n\n");
    #endif

    return NULL;
}


/*
** Forks a new process and execs the command
** making sure all file descriptors are set up correctly.
**
** Parent process returns -1 on error.
** Any child processes should not return.
*/
int run_command(Command *command){
    #ifdef DEBUG
    printf("Running command: %s\n", command->exec_path);
    printf("Argvs: ");
    if (command->args == NULL){
        printf("NULL\n");
    }
    else if (command->args[0] == NULL){
        printf("Empty\n");
    }
    else {
        for (int i=0; command->args[i] != NULL; i++){
            printf("%d: [%s] ", i+1, command->args[i]);
        }
    }
    printf("\n");
    printf("Redir out: %s\n Redir in: %s\n",
           command->redir_out_path, command->redir_in_path);
    printf("Stdin fd: %d | Stdout fd: %d\n",
           command->stdin_fd, command->stdout_fd);
    #endif


    #ifdef DEBUG
    printf("Parent process created child PID [%d] for %s\n", pid, command->exec_path);
    #endif
    return -1;
}


int run_script(char *file_path, Variable **root){
    return -1;
}

void free_command(Command *command){

}