diff options
Diffstat (limited to 'io.c')
-rw-r--r-- | io.c | 16 |
1 files changed, 10 insertions, 6 deletions
@@ -1196,9 +1196,11 @@ void rb_io_set_nonblock(OpenFile *fptr) #else flags = 0; #endif - flags |= O_NONBLOCK; - if (fcntl(fileno(fptr->f), F_SETFL, flags) == -1) { - rb_sys_fail(fptr->path); + if ((flags & O_NONBLOCK) == 0) { + flags |= O_NONBLOCK; + if (fcntl(fileno(fptr->f), F_SETFL, flags) == -1) { + rb_sys_fail(fptr->path); + } } if (fptr->f2) { #ifdef F_GETFL @@ -1209,9 +1211,11 @@ void rb_io_set_nonblock(OpenFile *fptr) #else flags = 0; #endif - flags |= O_NONBLOCK; - if (fcntl(fileno(fptr->f2), F_SETFL, flags) == -1) { - rb_sys_fail(fptr->path); + if ((flags & O_NONBLOCK) == 0) { + flags |= O_NONBLOCK; + if (fcntl(fileno(fptr->f2), F_SETFL, flags) == -1) { + rb_sys_fail(fptr->path); + } } } } |