core/cfs/cfs-posix.c

   1 /*
   2  * Copyright (c) 2004, Swedish Institute of Computer Science.
   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  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the Institute nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * This file is part of the Contiki operating system.
  30  *
  31  * Author: Adam Dunkels <adam@sics.se>
  32  *
  33  * $Id: cfs-posix.c,v 1.15 2009/08/10 09:50:55 nvt-se Exp $
  34  */
  35
  36 #include <stdio.h>
  37 #include <fcntl.h>
  38 #ifdef _MSC_VER
  39 #include <io.h>
  40 #else
  41 #include <unistd.h>
  42 #endif
  43
  44 #include "cfs/cfs.h"
  45
  46 /*---------------------------------------------------------------------------*/
  47 int
  48 cfs_open(const char *n, int f)
  49 {
  50   int s = 0;
  51   if(f == CFS_READ) {
  52     return open(n, O_RDONLY);
  53   } else if(f & CFS_WRITE) {
  54     s = O_CREAT;
  55     if(f & CFS_READ) {
  56       s |= O_RDWR;
  57     } else {
  58       s |= O_WRONLY;
  59     }
  60     if(f & CFS_APPEND) {
  61       s |= O_APPEND;
  62     } else {
  63       s |= O_TRUNC;
  64     }
  65     return open(n, s, 0600);
  66   }
  67   return -1;
  68 }
  69 /*---------------------------------------------------------------------------*/
  70 void
  71 cfs_close(int f)
  72 {
  73   close(f);
  74 }
  75 /*---------------------------------------------------------------------------*/
  76 int
  77 cfs_read(int f, void *b, unsigned int l)
  78 {
  79   return read(f, b, l);
  80 }
  81 /*---------------------------------------------------------------------------*/
  82 int
  83 cfs_write(int f, const void *b, unsigned int l)
  84 {
  85   return write(f, b, l);
  86 }
  87 /*---------------------------------------------------------------------------*/
  88 cfs_offset_t
  89 cfs_seek(int f, cfs_offset_t o, int w)
  90 {
  91   if(w == CFS_SEEK_SET) {
  92     w = SEEK_SET;
  93   } else if(w == CFS_SEEK_CUR) {
  94     w = SEEK_CUR;
  95   } else if(w == CFS_SEEK_END) {
  96     w = SEEK_END;
  97   } else {
  98     return (cfs_offset_t)-1;
  99   }
 100   return lseek(f, o, w);
 101 }
 102 /*---------------------------------------------------------------------------*/
 103 int
 104 cfs_remove(const char *name)
 105 {
 106   return remove(name);
 107 }
 108 /*---------------------------------------------------------------------------*/