S_ISFIFO           74 lib/sys_stat.in.h # undef S_ISFIFO
S_ISFIFO          114 lib/sys_stat.in.h #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
S_ISFIFO          116 lib/sys_stat.in.h #  define S_ISFIFO(m) 0