set flag only if setting to non-blocking worked

21 years ago · 27ffe564a7
parent aeb609627b
commit 27ffe564a7
1 changed files with 2 additions and 2 deletions
--- a/io/io_nonblock.c
+++ b/io/io_nonblock.c
@ -5,6 +5,6 @@

 void io_nonblock(int64 d) {
  io_entry* e=array_get(&io_fds,sizeof(io_entry),d);
-  fcntl(d,F_SETFL,fcntl(d,F_GETFL,0) | O_NDELAY);
-  if (e) e->nonblock=1;
+  if (fcntl(d,F_SETFL,fcntl(d,F_GETFL,0) | O_NDELAY)==0)
+    if (e) e->nonblock=1;
 }