blockdev?(p1)
Returns true if the named file is a block device.
static VALUE rb_file_blockdev_p(VALUE obj, VALUE fname) { #ifndef S_ISBLK # ifdef S_IFBLK # define S_ISBLK(m) ((m & S_IFMT) == S_IFBLK) # else # define S_ISBLK(m) (0) /* anytime false */ # endif #endif #ifdef S_ISBLK struct stat st; if (rb_stat(fname, &st) < 0) return Qfalse; if (S_ISBLK(st.st_mode)) return Qtrue; #endif return Qfalse; }