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  1. /*
  2.  * Copyright (c) 2006 Martin Decky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup fs
  30.  * @{
  31.  */
  32.  
  33. /**
  34.  * @file    fs.c
  35.  * @brief   File system driver for HelenOS.
  36.  */
  37.  
  38. #include <ipc/ipc.h>
  39. #include <ipc/services.h>
  40. #include <ipc/ns.h>
  41. #include <sysinfo.h>
  42. #include <stdio.h>
  43. #include <stdlib.h>
  44. #include <as.h>
  45. #include <ddi.h>
  46. #include <align.h>
  47. #include <bool.h>
  48. #include <errno.h>
  49. #include <async.h>
  50. #include "fs.h"
  51.  
  52.  
  53. static void fs_connection(ipc_callid_t iid, ipc_call_t *icall)
  54. {
  55.     ipc_callid_t callid;
  56.     ipc_call_t call;
  57.     int retval;
  58.  
  59.     ipc_answer_fast(iid, 0, 0, 0);
  60.  
  61.     while (1) {
  62.         callid = async_get_call(&call);
  63.         switch (IPC_GET_METHOD(call)) {
  64.         case IPC_M_PHONE_HUNGUP:
  65.             ipc_answer_fast(callid, 0,0,0);
  66.             return;
  67.         case FS_OPEN:
  68.             //Why doesn't printf do anything in this task?
  69.             printf("FS_OPEN called");  
  70.             char * f_name = (char *) IPC_GET_ARG1(call);
  71.             printf("I should open file: %s \n",f_name);
  72.             retval = 73;
  73.             break;
  74.         case FS_READ:
  75.             printf("FS_READ called");
  76.             unsigned int file_handle = IPC_GET_ARG1(call);
  77.             void * buffer = (void *) IPC_GET_ARG2(call);
  78.             unsigned int count = IPC_GET_ARG3(call);
  79.             //I still don't know how to copy memory to another task :(
  80.             //Or can i only map memory?
  81.             retval = 0;
  82.             break;
  83.         default:
  84.             retval = EINVAL;
  85.         }
  86.         ipc_answer_fast(callid, retval, 0, 0);
  87.     }  
  88. }
  89.  
  90.  
  91. static bool fs_init(void)
  92. {
  93.    
  94.     return true;
  95. }
  96.  
  97. int main(int argc, char **argv)
  98. {
  99.     if (fs_init()) {
  100.         ipcarg_t phonead;
  101.        
  102.         async_set_client_connection(fs_connection);
  103.        
  104.         /* Register service at nameserver */
  105.         if (ipc_connect_to_me(PHONE_NS, SERVICE_FS, 0, &phonead) != 0)
  106.             return -1;
  107.        
  108.         async_manager();
  109.        
  110.         /* Never reached */
  111.         return 0;
  112.     }
  113.    
  114.     return -1;
  115. }
  116.  
  117. /**
  118.  * @}
  119.  */
  120.