🚀 go-pugleaf

In article <1992Oct31.060115.29466@cs.wisc.edu> tan@feta.cs.wisc.edu (C.K. Tan) writes:
>Could someone tell me how to do BSD4.3 style SIGIO handling in HP/UX? 
>I have got a few TCP connections set up, and would like to catch SIGIO
>when data arrived. In BSD, I would use fcntl() to F_SETOWN and then
>F_SETFL to O_ASYNC. I could not find anything in the man pages that 
>describe asynchronous I/O, although SIGIO is defined in sys/signal.h

Here is the most portable code I am using for all systems (??)

# ifdef sco
  if (ioctl (sock_fd, I_SETSIG, S_INPUT) < 0) {
    some error
    return -1;
  }
# else
#  ifdef F_SETOWN
  if (fcntl (sock_fd, F_SETOWN, getpid()) < 0) {
    some error
    return -1;
  }
#  elif defined (SIOCSPGRP)
  value = -getpid();
  if (ioctl (sock_fd, SIOCSPGRP, (char *) &value) < 0) {
    some error
    return -1;
  }
#  else
  some error
  return -1;
#  endif
#  ifdef FASYNC
  if (fcntl (sock_fd, F_SETFL, (fcntl (sock_fd, F_GETFL, 0) | FASYNC)) < 0) {
    some error
    return -1;
  }
#  elif defined (FIOASYNC)
  value = 1;
  if (ioctl (sock_fd, FIOASYNC, (char *) &value) < 0) {
    some error
    return -1;
  }
#  else
  some error
  return -1;
#  endif
# endif


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