diff options
| -rw-r--r-- | winsup/cygwin/posix_ipc.cc | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/winsup/cygwin/posix_ipc.cc b/winsup/cygwin/posix_ipc.cc index 1f13c22..1e5e401 100644 --- a/winsup/cygwin/posix_ipc.cc +++ b/winsup/cygwin/posix_ipc.cc @@ -966,7 +966,8 @@ _mq_receive (mqd_t mqd, char *ptr, size_t maxlen, unsigned int *priop, } if (attr->mq_curmsgs == 0) /* queue is empty */ { - if (mqinfo->mqi_flags & O_NONBLOCK) + /* Don't block if O_NONBLOCK is set or when peeking */ + if ((mqinfo->mqi_flags & O_NONBLOCK) || (flags & _MQ_PEEK_PACKET)) { set_errno (EAGAIN); __leave; |