kernel/lib/stdio/write.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2007  Tomas 'ZeXx86' Jedrzejek (zexx86@gmail.com)
   4  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@gmail.com)
   5  *
   6  *  This program is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20
  21 #include <system.h>
  22 #include <string.h>
  23 #include <stdio.h>
  24 #include <file.h>
  25 #include <mount.h>
  26 #include <env.h>
  27 #include <vfs.h>
  28 #include <fd.h>
  29
  30 /* TODO: flags */
  31 int write (unsigned fd, void *buf, unsigned len)
  32 {
  33         fd_t *d = fd_get (fd);
  34
  35         if (!d)
  36                 return 0;
  37
  38         char *file = dir[d->index].name;
  39
  40         if (!file) {
  41                 DPRINT ("write () -> !file\n");
  42                 return 0;
  43         }
  44
  45         unsigned file_len = strlen (file);
  46
  47         /* create file when not exist */
  48         if (d->flags & O_CREAT) {
  49                 vfs_touch ((char *) file, file_len);
  50         }
  51
  52         memcpy (d->s, (char *) buf, len);
  53         d->s[len] = '\0';
  54
  55         if (!d->e) {
  56                 if (!vfs_mmap (file, file_len, buf, len))
  57                         return 0;
  58         } else {
  59                 DPRINT ("write () - !d->e not implemented - O_APPEND..\n");
  60                 return 0;
  61         }
  62
  63         d->e += len;
  64
  65         return 1;
  66 }
  67
  68