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/*
* Pipe I/O for Unix
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/pipe.h>
#include <botan/exceptn.h>
#include <unistd.h>
namespace Botan {
/*
* Write data from a pipe into a Unix fd
*/
int operator<<(int fd, Pipe& pipe)
{
SecureVector<byte> buffer(DEFAULT_BUFFERSIZE);
while(pipe.remaining())
{
u32bit got = pipe.read(buffer, buffer.size());
u32bit position = 0;
while(got)
{
ssize_t ret = write(fd, buffer + position, got);
if(ret == -1)
throw Stream_IO_Error("Pipe output operator (unixfd) has failed");
position += ret;
got -= ret;
}
}
return fd;
}
/*
* Read data from a Unix fd into a pipe
*/
int operator>>(int fd, Pipe& pipe)
{
SecureVector<byte> buffer(DEFAULT_BUFFERSIZE);
while(true)
{
ssize_t ret = read(fd, buffer, buffer.size());
if(ret == 0) break;
if(ret == -1)
throw Stream_IO_Error("Pipe input operator (unixfd) has failed");
pipe.write(buffer, ret);
}
return fd;
}
}
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