1 #include "select.h"

     2 #include "open.h"

     3 #include "trigger.h"

     4 #include "hasnpbg1.h"

     5 

     6 static int fd = -1;

     7 #ifdef HASNAMEDPIPEBUG1

     8 static int fdw = -1;

     9 #endif

    10 

    11 void trigger_set()

    12 {

    13  if (fd != -1)

    14    close(fd);

    15 #ifdef HASNAMEDPIPEBUG1

    16  if (fdw != -1)

    17    close(fdw);

    18 #endif

    19  fd = open_read("lock/trigger");

    20 #ifdef HASNAMEDPIPEBUG1

    21  fdw = open_write("lock/trigger");

    22 #endif

    23 }

    24 

    25 void trigger_selprep(nfds,rfds)

    26 int *nfds;

    27 fd_set *rfds;

    28 {

    29  if (fd != -1)

    30   {

    31    FD_SET(fd,rfds);

    32    if (*nfds < fd + 1) *nfds = fd + 1;

    33   }

    34 }

    35 

    36 int trigger_pulled(rfds)

    37 fd_set *rfds;

    38 {

    39  if (fd != -1) if (FD_ISSET(fd,rfds)) return 1;

    40  return 0;

    41 }