apps/sh/main.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2007  Tomas 'ZeXx86' Jedrzejek (zexx86@gmail.com)
   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 <stdio.h>
  21 #include <string.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24
  25 #define SHELL_VERSION           "0.0.1"
  26
  27 char *cmdline;
  28 unsigned cmdline_len;
  29
  30 unsigned key_pressed (int keycode)
  31 {
  32         int scancode = getkey ();
  33
  34         if (scancode == keycode)
  35                 return 1;
  36
  37         if (scancode == keycode+128)
  38                 return 2;
  39         else
  40                 return 0;
  41 }
  42
  43 int init ()
  44 {
  45         cmdline = (char *) malloc (sizeof (char) * 64);
  46
  47         if (!cmdline) {
  48                 puts ("oj !\n");
  49                 return 0;
  50         }
  51
  52         cmdline_len = 0;
  53
  54         return 1;
  55 }
  56
  57 int check_cmd (char *cmd, unsigned l)
  58 {
  59         if (!cmdline_len)
  60                 return 1;
  61
  62 ///     puts ("\ncommand: ");
  63 ///     puts (cmd);
  64
  65 //      printf ("\ncommand");
  66
  67         /* exit app */
  68         if (!strcmp (cmd, "exit")) {
  69
  70                 puts ("\nexit");
  71                 return 0;
  72
  73         }
  74
  75         return 1;
  76 }
  77
  78 int loop ()
  79 {
  80         int ret = 1;
  81         unsigned char c;
  82
  83         c = getch ();
  84
  85         if (c && cmdline_len < 64) {
  86                 cmdline[cmdline_len] = (char) c;
  87
  88                 if (c == '\n') {
  89                         cmdline[cmdline_len] = '\0';
  90                         ret = check_cmd (cmdline, cmdline_len);
  91                         cmdline_len = 0;
  92                 } else if (c == '\b')
  93                         cmdline_len --;
  94                 else
  95                         cmdline_len ++;
  96
  97                 putch (c);
  98         }
  99
 100         schedule ();
 101
 102         return ret;
 103 }
 104
 105 int main (char *arg, int argl)
 106 {
 107         puts ("Shell v" SHELL_VERSION);
 108
 109         int ret = init ();
 110
 111         while (ret)
 112                 ret = loop ();
 113
 114         exit (1);
 115
 116         return 1;
 117 }
 118