apps/im/src/ui.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include "proto.h"
  21 #include "user.h"
  22
  23 #include <fcntl.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <stdlib.h>
  27 #include <unistd.h>
  28
  29 static char *uibuffer;
  30 static unsigned len;
  31
  32 int getstring (char *str)
  33 {
  34         char c = getchar ();
  35
  36         if (c != -1) {
  37                 if (c == '\n') {
  38                         unsigned l = len;
  39                         len = 0;
  40
  41                         return l;
  42                 }
  43                 if (c == '\b') {
  44                         if (len > 0)
  45                                 len --;
  46
  47                         return 0;
  48                 }
  49
  50                 str[len] = c;
  51                 len ++;
  52         }
  53
  54         return 0;
  55 }
  56
  57 int ui_getcommand ()
  58 {
  59         int len = getstring (uibuffer);
  60
  61         if (len > 0) {
  62                 uibuffer[len] = '\0';
  63
  64                 return user_msgparse (uibuffer, len);
  65         }
  66
  67         return 0;
  68 }
  69
  70 /** INIT USER INTERFACE function */
  71 int init_ui ()
  72 {
  73         uibuffer = (char *) malloc (sizeof (char) * 512);
  74
  75         if (!uibuffer)
  76                 return 0;
  77
  78         /* set socket "sock" to non-blocking */
  79         int oldFlag = fcntl (1, F_GETFL, 0);
  80         if (fcntl (1, F_SETFL, oldFlag | O_NONBLOCK) == -1) {
  81                 printf ("Cant set socket to nonblocking mode\n");
  82                 return 0;
  83         }
  84
  85         len = 0;
  86
  87         return 1;
  88 }