[Octave-bug-tracker] [bug #57087] [instrument-control] tests fail on macOS for tcp/udp read/write

[John Donoghue]

Follow-up Comment #3, bug #57087 (project octave):

A small test oct file taht maybe will tell something?

In linux i can compile it using mkoctfile selectest.cc


#include <iostream>
#include <string>
#include <unistd.h>
#include <errno.h>
#include <octave/oct.h>

DEFUN_DLD (selecttest, args, nargout,
        "-*- texinfo -*-\n\
@deftypefn {Loadable Function} {} testselect (])\n \
Test function\n \
@end deftypefn")
{
  struct timeval tv;

  printf("starting\n");

  printf("select 1 second in usecs ...\n");

  tv.tv_sec = 0;
  tv.tv_usec = 1000 * 1000;

  if (::select(0, NULL, NULL, NULL, &tv) < 0)
    {
      error("udp_read: Error while reading/select: %d - %s\n", errno,
strerror(errno));
    }
  else
    printf("ok\n");


  printf("select 1 second in secs ...\n");

  FD_ZERO (&readfds);

  tv.tv_sec = 1;
  tv.tv_usec = 0;

  if (::select(0, NULL, NULL, NULL, &tv) < 0)
    {
      error("udp_read: Error while reading/select: %d - %s\n", errno,
strerror(errno));
    }
  else
    printf("ok\n");

  return octave_value();
}


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