Contiki-NG
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  */
34 
35 #include <stdio.h>
36 #include <fcntl.h>
37 #ifdef _MSC_VER
38 #include <io.h>
39 #else
40 #include <unistd.h>
41 #endif
42 
43 #define CFS_IMPL 1
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 /*---------------------------------------------------------------------------*/
int cfs_open(const char *n, int f)
Open a file.
Definition: cfs-posix.c:48
int cfs_remove(const char *name)
Remove a file.
Definition: cfs-posix.c:104
cfs_offset_t cfs_seek(int f, cfs_offset_t o, int w)
Seek to a specified position in an open file.
Definition: cfs-posix.c:89
#define CFS_APPEND
Specify that cfs_open() should append written data to the file rather than overwriting it...
Definition: cfs.h:120
int cfs_write(int f, const void *b, unsigned int l)
Write data to an open file.
Definition: cfs-posix.c:83
CFS header file.
void cfs_close(int f)
Close an open file.
Definition: cfs-posix.c:71
#define CFS_SEEK_END
Specify that cfs_seek() should compute the offset from the end of the file.
Definition: cfs.h:147
int cfs_read(int f, void *b, unsigned int l)
Read data from an open file.
Definition: cfs-posix.c:77
#define CFS_READ
Specify that cfs_open() should open a file for reading.
Definition: cfs.h:92
#define CFS_SEEK_CUR
Specify that cfs_seek() should compute the offset from the current position of the file pointer...
Definition: cfs.h:138
#define CFS_SEEK_SET
Specify that cfs_seek() should compute the offset from the beginning of the file. ...
Definition: cfs.h:129
#define CFS_WRITE
Specify that cfs_open() should open a file for writing.
Definition: cfs.h:106