S_ISFIFO         1030 file.c         #    define S_ISFIFO(m) ((m & S_IFMT) == S_IFIFO)
S_ISFIFO          169 include/ruby/defines.h #define S_ISFIFO(mode) (((mode) & (0170000)) == (0010000))
S_ISFIFO          294 include/ruby/win32.h #undef S_ISFIFO
S_ISFIFO          299 include/ruby/win32.h #define S_ISFIFO(m) (((unsigned short)(m) & S_IFMT) == S_IFIFO)