MINOR: fd: Use closefrom() as my_closefrom() if supported.
Add a new option, USE_CLOSEFROM. If set, it is assumed the system provides
a closefrom() function, so use it.
It is only implicitely used on FreeBSD for now, it should work on
OpenBSD/NetBSD/DragonflyBSD/Solaris too, but as I have no such system to
test it, I'd rather leave it disabled by default. Users can add USE_CLOSEFROM
explicitely on their make command line to activate it.
diff --git a/src/fd.c b/src/fd.c
index 314e10f..581c5aa 100644
--- a/src/fd.c
+++ b/src/fd.c
@@ -468,7 +468,13 @@
fdlist_process_cached_events(&fd_cache);
}
-#if defined(ENABLE_POLL)
+#if defined(USE_CLOSEFROM)
+void my_closefrom(int start)
+{
+ closefrom(start);
+}
+
+#elif defined(ENABLE_POLL)
/* This is a portable implementation of closefrom(). It closes all open file
* descriptors starting at <start> and above. It relies on the fact that poll()
* will return POLLNVAL for each invalid (hence close) file descriptor passed