FreeNOS
getcwd.cpp
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1 /*
2  * Copyright (C) 2009 Niek Linnenbank
3  *
4  * This program is free software: you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation, either version 3 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program. If not, see <http://www.gnu.org/licenses/>.
16  */
17 
18 #include <Assert.h>
19 #include <FileSystemClient.h>
20 #include <string.h>
21 #include <errno.h>
22 #include "unistd.h"
23 
24 char *getcwd(char *buf, size_t size)
25 {
26  const FileSystemClient filesystem;
27  const String *currentDirectory = filesystem.getCurrentDirectory();
28 
29  // Copy our current working directory
30  assert(currentDirectory != NULL);
31  memcpy(buf, **currentDirectory, size);
32 
33  // Set errno
34  errno = ESUCCESS;
35 
36  // Done
37  return buf;
38 }
errno
C int errno
The lvalue errno is used by many functions to return error values.
string.h
getcwd
char * getcwd(char *buf, size_t size)
Get the pathname of the current working directory.
Definition: getcwd.cpp:24
String
Abstraction of strings.
Definition: String.h:41
FileSystemClient
FileSystemClient provides a simple interface to a FileSystemServer.
Definition: FileSystemClient.h:42
Assert.h
ESUCCESS
#define ESUCCESS
Reports a success operation.
Definition: errno.h:43
FileSystemClient::getCurrentDirectory
const String * getCurrentDirectory() const
Get current directory String.
Definition: FileSystemClient.cpp:146
NULL
#define NULL
NULL means zero.
Definition: Macros.h:39
unistd.h
FileSystemClient.h
assert
#define assert(exp)
Insert program diagnostics.
Definition: assert.h:60
memcpy
void * memcpy(void *dest, const void *src, size_t count)
Copy memory from one place to another.
Definition: memcpy.cpp:20
errno.h