multilogdevice.cc

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#include "multilogdevice.h"
#include <string>
 
#include <sys/types.h>
#include <sys/select.h>
#include <sys/time.h>
#include <unistd.h>
#include <errno.h>
 
using namespace ::std;
using namespace ::Binc;
 
//------------------------------------------------------------------------
MultilogDevice::MultilogDevice(int f) : IODevice(f)
{
}
 
//------------------------------------------------------------------------
MultilogDevice::~MultilogDevice(void)
{
}
 
//------------------------------------------------------------------------
string MultilogDevice::service(void) const
{
  return "log";
}
 
//------------------------------------------------------------------------
bool MultilogDevice::waitForWrite(void) const
{
  fd_set writeMask;
  FD_ZERO(&writeMask);
  FD_SET(fileno(stderr), &writeMask);
 
  struct timeval tv;
  tv.tv_sec = getTimeout();
  tv.tv_usec = 0;
 
  int result = select(fileno(stderr) + 1, 0, &writeMask,
                      0, tv.tv_sec ? &tv : 0);
 
  return result > 0;
}
 
//------------------------------------------------------------------------
bool MultilogDevice::waitForRead(void) const
{
  return false;
}
 
//------------------------------------------------------------------------
IODevice::WriteResult MultilogDevice::write(void)
{
  for (;;) {
    ssize_t wrote = ::write(fileno(stderr), outputBuffer.str().c_str(),
                            outputBuffer.getSize());
 
    if (wrote == -1) {
      if (errno == EINTR) 
        continue;
      else
        return WriteError;
    }
 
    if ((unsigned int) wrote == outputBuffer.getSize()) {
      outputBuffer.clear();
      return WriteDone;
    }
 
    outputBuffer.popString(wrote);
    return WriteWait;
  }
}
 
//------------------------------------------------------------------------
bool MultilogDevice::fillInputBuffer(void)
{
  return false;
}