Botan: src/filters/fd_unix/fd_unix.cpp Source File

Botan 1.10.16

fd_unix.cpp
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1 /*
2 * Pipe I/O for Unix
3 * (C) 1999-2007 Jack Lloyd
4 *
5 * Distributed under the terms of the Botan license
6 */
7
8 #include <botan/pipe.h>
9 #include <botan/exceptn.h>
10 #include <unistd.h>
11
12 namespace Botan {
13
14 /*
15 * Write data from a pipe into a Unix fd
16 */
17 int operator<<(int fd, Pipe& pipe)
18 {
19 SecureVector<byte> buffer(DEFAULT_BUFFERSIZE);
20 while(pipe.remaining())
21 {
22 size_t got = pipe.read(&buffer[0], buffer.size());
23 size_t position = 0;
24 while(got)
25 {
26 ssize_t ret = write(fd, &buffer[position], got);
27 if(ret == -1)
28 throw Stream_IO_Error("Pipe output operator (unixfd) has failed");
29 position += ret;
30 got -= ret;
31 }
32 }
33 return fd;
34 }
35
36 /*
37 * Read data from a Unix fd into a pipe
38 */
39 int operator>>(int fd, Pipe& pipe)
40 {
41 SecureVector<byte> buffer(DEFAULT_BUFFERSIZE);
42 while(true)
43 {
44 ssize_t ret = read(fd, &buffer[0], buffer.size());
45 if(ret == 0) break;
46 if(ret == -1)
47 throw Stream_IO_Error("Pipe input operator (unixfd) has failed");
48 pipe.write(&buffer[0], ret);
49 }
50 return fd;
51 }
52
53 }
Botan::Stream_IO_Error
Definition: exceptn.h:165
Botan::Pipe::remaining
size_t remaining(message_id msg=DEFAULT_MESSAGE) const
Definition: pipe_rw.cpp:138
Botan::Pipe::read
size_t read(byte output[], size_t length)
Definition: pipe_rw.cpp:89
Botan::Pipe::write
void write(const byte in[], size_t length)
Definition: pipe_rw.cpp:34
Botan::operator>>
int operator>>(int fd, Pipe &pipe)
Definition: fd_unix.cpp:39
Botan::operator<<
int operator<<(int fd, Pipe &pipe)
Definition: fd_unix.cpp:17
Botan
Definition: algo_base.h:14
Botan::MemoryRegion::size
size_t size() const
Definition: secmem.h:29
Botan::SecureVector< byte >
Botan::Pipe
Definition: pipe.h:25