```{index} single: s_isfifo; Fcntl function ``` ```{index} single: Fcntl::s_isfifo; Perl function ``` # s_isfifo True if a stat-mode value names a named pipe (FIFO). ## Synopsis ```perl my $mode = (stat $path)[2]; print "fifo\n" if S_ISFIFO($mode); ``` Returns `1` when `$mode & S_IFMT == S_IFIFO`, `0` otherwise. With no argument, returns `0`.