diff options
Diffstat (limited to 'ext/io/nonblock')
-rw-r--r-- | ext/io/nonblock/nonblock.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/ext/io/nonblock/nonblock.c b/ext/io/nonblock/nonblock.c index d7e1ac8e01..1d866ceb0f 100644 --- a/ext/io/nonblock/nonblock.c +++ b/ext/io/nonblock/nonblock.c @@ -47,10 +47,16 @@ rb_io_nonblock_p(VALUE io) static void io_nonblock_set(int fd, int f, int nb) { - if (nb) + if (nb) { + if ((f & O_NONBLOCK) != 0) + return; f |= O_NONBLOCK; - else + } + else { + if ((f & O_NONBLOCK) == 0) + return; f &= ~O_NONBLOCK; + } if (fcntl(fd, F_SETFL, f) == -1) rb_sys_fail(0); } |