Ensure that PollVec enum matches poll values

kadler · lavv17 · commit 40c20c587ed6 · 2022-07-23T11:39:46.000+03:00
IN and OUT are used by PollVec mask functions to determine which fd_sets to use in AddFD, FDReady, and FDSetNotReady, however these enums are not used outside of PollVec code and the rest of the code uses POLLIN and POLLOUT definitions instead. This works on many POSIX platforms since the enum values match the POLLIN and POLLOUT values, but not on AIX where POLLOUT is 2 instead of 4. This prevents code from determining when a file descriptor is writeable, leading to a hang when using FTPS protocol (at least). Fixes #672
diff --git a/src/PollVec.h b/src/PollVec.h
@@ -59,8 +59,8 @@ class PollVec
    void	 Block();
 
    enum {
-      IN=1,
-      OUT=4,
+      IN=POLLIN,
+      OUT=POLLOUT,
    };
 
    void SetTimeout(const timeval &t) { tv_timeout=t; }
