msgbuf_write
if (msgbuf_write(&ibuf->w) <= 0)
int msgbuf_write(struct msgbuf *);
if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)