GNU Octave  9.1.0
A high-level interpreted language, primarily intended for numerical computations, mostly compatible with Matlab
wait-for-input.c
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25 
26 // select may be provided by gnulib. We don't include gnulib headers
27 // directly in Octave's C++ source files to avoid problems that may be
28 // caused by the way that gnulib overrides standard library functions.
29 
30 // We don't need select directly, we just need to use it to wait for
31 // input on an open file descriptor.
32 
33 #if defined (HAVE_CONFIG_H)
34 # include "config.h"
35 #endif
36 
37 #include <sys/select.h>
38 
39 #include "wait-for-input.h"
40 
41 int
43 {
44  int retval = -1;
45 
46 #if defined (HAVE_SELECT)
47  if (fid >= 0)
48  {
49  fd_set set;
50 
51  FD_ZERO (&set);
52  FD_SET (fid, &set);
53 
54  retval = select (FD_SETSIZE, &set, 0, 0, 0);
55  }
56 #else
57  octave_unused_parameter (fid);
58 
59  retval = 1;
60 #endif
61 
62  return retval;
63 }
int octave_wait_for_input(int fid)