2 Test whether a file descriptor is a pipe.
10 stdbool [test $HAVE_ISAPIPE = 0]
11 sys_stat [test $HAVE_ISAPIPE = 0]
12 unistd [test $HAVE_ISAPIPE = 0]
13 msvc-nothrow [test $HAVE_ISAPIPE = 0]
14 fstat [test $HAVE_ISAPIPE = 0]
18 if test $HAVE_ISAPIPE = 0; then
32 Paul Eggert, Jim Meyering