Pileus Git - ~andy/rhawk/blob - select.awk

   1 BEGIN {
   2         extension("./select.so", "dlload");
   3
   4         nc0   = "netcat -l -p 12345"
   5         nc1   = "netcat -l -p 54321"
   6         stdin = "/dev/stdin"
   7
   8         while (1) {
   9                 # Open pipes
  10                 printf "" |& nc0
  11                 printf "" |& nc1
  12
  13                 # Wait for input
  14                 if (!(fd = select("from", stdin, nc0, nc1))) {
  15                         print "timeout"
  16                         continue
  17                 }
  18
  19                 # Read a line
  20                 if (fd == stdin)
  21                         if (!(st = getline line < fd))
  22                                 exit 0
  23                 if (fd == nc0 || fd == nc1)
  24                         if (!(st = fd |& getline line)) {
  25                                 print "broken pipe"
  26                                 close(fd)
  27                                 continue
  28                         }
  29
  30                 # Print output
  31                 print "line: [" fd "] -> [" line "]"
  32         }
  33 }