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/*
* Pipe I/O for Unix
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#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)
{
secure_vector<uint8_t> buffer(BOTAN_DEFAULT_BUFFER_SIZE);
while(pipe.remaining())
{
size_t got = pipe.read(buffer.data(), buffer.size());
size_t position = 0;
while(got)
{
ssize_t ret = ::write(fd, &buffer[position], got);
if(ret < 0)
throw Stream_IO_Error("Pipe output operator (unixfd) has failed");
position += static_cast<size_t>(ret);
got -= static_cast<size_t>(ret);
}
}
return fd;
}
/*
* Read data from a Unix fd into a pipe
*/
int operator>>(int fd, Pipe& pipe)
{
secure_vector<uint8_t> buffer(BOTAN_DEFAULT_BUFFER_SIZE);
while(true)
{
ssize_t ret = ::read(fd, buffer.data(), buffer.size());
if(ret < 0)
throw Stream_IO_Error("Pipe input operator (unixfd) has failed");
else if(ret == 0)
break;
pipe.write(buffer.data(), static_cast<size_t>(ret));
}
return fd;
}
}
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