diff options
Diffstat (limited to 'io.c')
-rw-r--r-- | io.c | 8 |
1 files changed, 5 insertions, 3 deletions
@@ -1247,9 +1247,11 @@ void rb_io_set_nonblock(OpenFile *fptr) #else flags = 0; #endif - flags |= O_NONBLOCK; - if (fcntl(fptr->fd, F_SETFL, flags) == -1) { - rb_sys_fail(fptr->path); + if ((flags & O_NONBLOCK) == 0) { + flags |= O_NONBLOCK; + if (fcntl(fptr->fd, F_SETFL, flags) == -1) { + rb_sys_fail(fptr->path); + } } } |