rsh_cli.c

#include "rshlib.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>


int start_client(char *server_ip, int port) {
    int sock;
    struct sockaddr_in server;

    // Create socket
    sock = socket(AF_INET, SOCK_STREAM, 0);
    if (sock == -1) {
        perror("[ERROR] Could not create socket");
        return ERR_RDSH_CLIENT;
    }

    server.sin_addr.s_addr = inet_addr(server_ip);
    server.sin_family = AF_INET;
    server.sin_port = htons(port);

    // Connect to server
    if (connect(sock, (struct sockaddr *)&server, sizeof(server)) < 0) {
        perror("[ERROR] Connection failed");
        return ERR_RDSH_CLIENT;
    }

    printf("[DEBUG] Connected to server at %s:%d\n", server_ip, port);
    return sock;
}

/**
 * Main loop for remote command execution.
 */
int exec_remote_cmd_loop(char *address, int port) {
    int sock = start_client(address, port);
    if (sock < 0) return sock;

    char cmd[RDSH_COMM_BUFF_SZ];
    while (1) {
        printf("dsh4> ");
        if (fgets(cmd, sizeof(cmd), stdin) == NULL) {
            printf("\n");
            break;
        }
        cmd[strcspn(cmd, "\n")] = '\0';

        if (strcmp(cmd, "exit") == 0) {
            break;
        }

        // Send command to server
        if (send(sock, cmd, strlen(cmd) + 1, 0) < 0) {
            perror("[ERROR] Send failed");
            break;
        }

        // Receive output
        char response[RDSH_COMM_BUFF_SZ];
        int recv_size;
        while ((recv_size = recv(sock, response, sizeof(response), 0)) > 0) {
            response[recv_size] = '\0';
            printf("%s", response);
            if (response[recv_size - 1] == RDSH_EOF_CHAR) break;
        }
    }

    close(sock);
    return OK;
}