Bonjour, je rencontre un petit problème dans un de mes programme.

Une partie de ce programme est un remote shell, la sortie de la commande se fait presque correctement, c'est à dire que lors de l'entrée de la 1ere commande la réception se fait. Lors de la seconde commande je ne reçois pas la sortie de la commande, je dois renvoyer la commande pour recevoir la sortie.

Je ne comprends pas trop pourquoi ça fait cela. En local sa fonctionne parfaitement par contre, mais dès que je test sur deux pc distinct là je rencontre le problème ci-dessus.

Voilà le code complet client et server de cette partie.

Client side :

Code : Sélectionner tout - Visualiser dans une fenêtre à part
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void cb_send_cmd(GtkWidget *widget, gpointer user_data)
{
   //SOCKET remote_shell_sock = 0;
 
    //GtkWidget *remote_shell_closed_dialog = NULL;
 
    GtkTextBuffer *text_buffer = NULL;
    gchar *text = NULL;
    GtkTextIter start;
    GtkTextIter end;
    gchar *utf8_text = NULL;
 
    FILE *log_cmd_output = NULL;
    FILE *log_cmd_historic = NULL;
 
    //char *buffer = NULL;
    const char *buffer_cmd = NULL;
    //char *log_buffer = NULL;
    //char *historic_buffer = NULL;
    char *start_command = "> Command : ";
 
    char historic[MAXDATASIZE] = {""};
    char cmd_output[MAXDATASIZE] = {""};
    int caractereLu = 0;
    int i = 0;
    char line[MAXDATASIZE] = {""};
    char line_output[MAXDATASIZE] = {""};
    char *print_line = NULL;
    char *print_line_output = NULL;
 
    size_t data_len = 0;
 
 
    sended_one_cmd = 1;
 
    buffer_cmd = gtk_entry_get_text(GTK_ENTRY(user_data));
 
    log_cmd_historic = fopen("Logs/cmd_historic.log", "a");
    if(log_cmd_historic == NULL)
    {
        error("fopen() log_cmd_historic", "cb_send_cmd()");
        return;
    }
    fputs("> Command : ", log_cmd_historic);
    fputs(buffer_cmd, log_cmd_historic);
    fputs("\n", log_cmd_historic);
 
    fclose(log_cmd_historic);
 
    log_cmd_output = fopen("Logs/remote_shell.log", "a");
    if(log_cmd_output == NULL)
    {
        error("fopen() log_cmd_output", "cb_send_cmd()");
        return;
    }
 
    // Write in log file the command name
    fputs("> Command : ", log_cmd_output);
    fputs(buffer_cmd, log_cmd_output);
    fputs("\n", log_cmd_output);
 
    var_allocation();
 
    /*
    buffer = malloc(BUFSIZ * sizeof(char));
    if(buffer == NULL)
    {
        error("malloc() buffer", "send_cmd()");
        return;
    }
 
    log_buffer = malloc(MAXDATASIZE  * sizeof(char));
    if(log_buffer == NULL)
    {
        error("malloc log_buffer", "cb_send_cmd()");
        return;
    }
 
    historic_buffer = malloc(MAXDATASIZE  * sizeof(char));
    if(historic_buffer == NULL)
    {
        error("malloc historic_buffer", "cb_send_cmd()");
        return;
    }
    */
 
    data_len = strlen(buffer_cmd) + 1;
 
    // Send the command length
    if(send(sock, (char*)&data_len, sizeof(data_len), 0) == SOCKET_ERROR)
    {
        error("send() data_len", "cb_send_cmd()");
        return;
    }
 
    // Send the command
    if(send(sock, buffer_cmd, data_len, 0) == SOCKET_ERROR)
    {
        error("send() buffer_cmd", "cb_send_cmd()");
        return;
    }
 
    if(strncmp(buffer_cmd, "quit", 4) == 0)
    {
 
        gtk_entry_set_text(GTK_ENTRY(user_data), "Use quit command for exit ...");
 
        if(system("rm -rf Logs/cmd_historic.log") == -1)
        {
            error("rm -rf Logs/cmd_historic.log in quit",  "cb_send_cmd()");
            return;
        }
 
        if(system("rm -rf Logs/remote_shell.log") == -1)
        {
            error("rm -rf Logs/remote_shell.log in quit",  "cb_send_cmd()");
            return;
        }
 
        //shutdown(remote_shell_sock, SHUT_WR);
 
        remote_shell_closed_dialog = gtk_message_dialog_new (GTK_WINDOW(main_win), GTK_DIALOG_MODAL, GTK_MESSAGE_INFO, GTK_BUTTONS_CLOSE, "Remote Shell have been closed !");
        switch(gtk_dialog_run(GTK_DIALOG(remote_shell_closed_dialog)))
        {
            default :
                gtk_widget_destroy(remote_shell_closed_dialog);
                break;
        }
 
        return;
    }
 
    /** PROBLEM DE RECEPTION DE LA COMMANDE **/
 
    // Receive the command output
    if(recv(sock, buffer, BUFSIZ, 0) == SOCKET_ERROR)
    {
        error("recv() buffer", "cb_send_cmd()");
        return;
    }
 
    printf("\n\nCommand output received : %s", buffer);
    printf("\n\n");
 
    // Write in log file the command output
    fputs(buffer, log_cmd_output);
    fputs("\n", log_cmd_output);
 
    fclose(log_cmd_output);
 
    // Fill buffer from print in command's historic
    utf8_text = g_locale_to_utf8(start_command, strlen(start_command), NULL, NULL, NULL);
    historic_buffer = strncpy(historic_buffer, utf8_text, strlen(utf8_text) + 1);
    historic_buffer = strncat(historic_buffer, buffer_cmd, strlen(buffer_cmd) + 1);
    historic_buffer = strncat(historic_buffer, "\n", 2);
 
    // Print output command in historic
    log_cmd_historic = fopen("Logs/cmd_historic.log", "r");
    if(log_cmd_historic == NULL)
    {
        error("fopen() cmd_historic opened with r", "cb_send_cmd()");
        return;
    }
 
    utf8_text = g_locale_to_utf8(historic, strlen(historic), NULL, NULL, NULL);
 
    while((caractereLu = fgetc(log_cmd_historic)) != EOF)
    {
        historic[i] = (char)caractereLu;
        i++;
    }
 
    print_line = malloc(MAXDATASIZE * sizeof(char));
    if(print_line == NULL)
    {
        error("malloc() print_line", "cb_send_cmd()");
        return;
    }
    fseek(log_cmd_historic, 0, SEEK_SET);
 
    if(log_cmd_historic != NULL)
    {
        strncpy(print_line, line, strlen(print_line) + 1);
        while (fgets(line, MAXDATASIZE, log_cmd_historic) != NULL)
        {
            strncat(print_line, line, strlen(line));
        }
        fclose(log_cmd_historic);
    }
 
    utf8_text = g_locale_to_utf8(print_line, strlen(print_line), NULL, NULL, NULL);
 
    // Obtaining the buffer associated with the widget
    text_buffer = gtk_text_view_get_buffer((GtkTextView*)(historic_text_view));
 
    // Set the default buffer text.
    gtk_text_buffer_set_text(text_buffer, utf8_text, -1);
 
    // Obtain iters for the start and end of points of the buffer
    gtk_text_buffer_get_start_iter(text_buffer, &start);
    gtk_text_buffer_get_end_iter(text_buffer, &end);
 
    // Get the entire buffer text
    text = gtk_text_buffer_get_text(text_buffer, &start, &end, FALSE);
 
    // Print the text
    g_print("%s", text);
 
    g_free(text);
 
    // Prepare for print command out put
    log_cmd_output = fopen("Logs/remote_shell.log", "r");
    if(log_cmd_output == NULL)
    {
        error("fopen() log_cmd_output opened with r", "cb_send_cmd()");
        return;
    }
 
    utf8_text = g_locale_to_utf8(cmd_output, strlen(cmd_output), NULL, NULL, NULL);
 
    while((caractereLu = fgetc(log_cmd_output)) != EOF)
    {
        cmd_output[i] = (char)caractereLu;
        i++;
    }
 
    print_line_output = malloc(MAXDATASIZE * sizeof(char));
    if(print_line_output == NULL)
    {
        error("malloc() print_line_output", "cb_send_cmd()");
        return;
    }
    fseek(log_cmd_output, 0, SEEK_SET);
 
    if(log_cmd_output != NULL)
    {
        strncpy(print_line_output, line_output, strlen(print_line_output) + 1);
        while (fgets(line_output, MAXDATASIZE, log_cmd_output) != NULL)
        {
            strncat(print_line_output, line_output, strlen(line_output));
        }
        fclose(log_cmd_output);
    }
 
    // Print outpout command in log
    // Copy the command output
    utf8_text = g_locale_to_utf8(print_line_output, strlen(print_line_output), NULL, NULL, NULL);
 
    // Obtaining the buffer associated with the widget
    text_buffer = gtk_text_view_get_buffer((GtkTextView*)(text_view));
 
    // Set the default buffer text.
    gtk_text_buffer_set_text(text_buffer, utf8_text, -1);
 
    // Obtain iters for the start and end of points of the buffer
    gtk_text_buffer_get_start_iter(text_buffer, &start);
    gtk_text_buffer_get_end_iter(text_buffer, &end);
 
    // Get the entire buffer text
    text = gtk_text_buffer_get_text(text_buffer, &start, &end, FALSE);
 
    // Print the text
    g_print("%s", text);
 
    g_free(text);
 
    free(buffer);
    free (log_buffer);
    free (historic_buffer);
 
    // Parametres inutilises
    (void)widget;
}
Server side :

Code : Sélectionner tout - Visualiser dans une fenêtre à part
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void start_remote_shell(char *argv[])
{
    pid_t the_son = 0;
    char *shell = NULL;
 
    FILE *pipe[2] = {NULL};
 
    char buffer[BUFSIZ]= {""};
    char buffer_cmd[MAXDATASIZE] = {""};
    size_t data_len = 0;
    int ret = 0;
 
    the_son = fork();
    if(the_son < 0)
    {
        error("fork() the_son", "start_remote_shell()");
        exit(1);
    }
 
    if(the_son == 0)
    {
        shell = getenv("SHELL");
 
        if(shell == NULL)
        {
            error("getenv() shell", "start_remote_shell()");
            exit(1);
        }
 
        if(execv(shell, &argv[0]) == -1)
        {
            error("execv() shell", "start_remote_shell()");
            exit(1);
        }
    }
 
    else /*father*/
    {
        for(;;)
        {
            if(recv(csock, (char*)&data_len, sizeof(data_len), 0) == -1)
            {
                error("recv() data_len", "start_remote_shell()");
                exit(1);
            }
 
            /* Receive the command */
            ret = recv (csock, buffer, data_len, 0);
            if (ret < 0)
            {
                error("recv() buffer", "start_remote_shell()");
                exit(1);
            }
 
            buffer[data_len - 1] = '\0';
 
            if(strncmp(buffer, "quit", 4) == 0)
                exit(1);
 
            pipe[0] = popen(buffer, "w");
            if(pipe[0] == NULL)
            {
                error("popen() pipe[0]", "start_remote_shell()");
                exit(1);
            }
 
            /* Send command results */
            pipe[1] =  popen(buffer, "r");
            if(pipe[1] == NULL)
            {
                error("popen() pipe[1]", "start_remote_shell()");
                exit(1);
            }
 
            ret = fread(buffer_cmd, MAXDATASIZE, sizeof(char), pipe[1]);
            if(ret < 0)
            {
 
                error("fread() buffer_cmd", "start_remote_shell()");
                exit(1);
            }
 
            printf("\n\nret = %d\n\n", ret);
 
            if(send(csock, buffer_cmd, BUFSIZ, 0) == SOCKET_ERROR)
            {
                error("send() buffer_cmd", "start_remote_shell()");
                exit(1);
            }
 
            memset(buffer_cmd, 0, MAXDATASIZE);
            memset(buffer, 0, BUFSIZ);
 
            if(pclose(pipe[0]) == -1)
            {
                error("pclose() pipe[0]", "start_remote_shell()");
                exit(1);
            }
 
            if(pclose(pipe[1]) == -1)
            {
                error("pclose() pipe[1]", "start_remote_shell()");
                exit(1);
            }
        }
    }
 
    return;
 
    //pthread_exit(NULL);
}
Voici une capture d'écran de ce que j'obtiens sur la GUI :

Nom : Capture d’écran du 2024-09-24 08-17-45.png Affichages : 154 Taille : 692,7 Ko


On voit bien que la 1ere commande (ls) pas de soucis, puis la seconde (ls -a) doit être envoyée deux fois pour recevoir la sortie.

Merci d'avance pour votre aide, bien à vous.

PS : Coté server la commande s'execute toujours correctement, le problème semble être uniquement dans le transfert du server vers le client de la sortie de la 2nd commande.

PS² : Coté server la fonction start_remote_shell() n'est pas déclaré comme un thread alors qu'il y a du code pour un thread dedans. J'aurais du mettre un prototype comme ça pour un thread : void *start_remote_shell(param, param). Est ce cela qui cause le problème ? Je n'en suis pas totalement persuadé.