Add comments about earlier fix for BSD systems.

2 files changed, 7 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 0c054d24..ac0b8355 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2018-01-25         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* main.c (main): Add explanatory comment about O_APPEND stuff.
+
 2018-01-22         Arnold D. Robbins     <arnold@skeeve.com>
 
 	Fix the inplace tests on *BSD systems.
diff --git a/main.c b/main.c
index 79782a81..2860d246 100644
--- a/main.c
+++ b/main.c
@@ -247,6 +247,9 @@ main(int argc, char **argv)
 		locale_dir = cp;
 
 #if defined(F_GETFL) && defined(O_APPEND)
+	// 1/2018: This is needed on modern BSD systems so that the
+	// inplace tests pass. I think it's a bug in those kernels
+	// but let's just work around it anyway.
 	int flags = fcntl(fileno(stderr), F_GETFL, NULL);
 	if (flags >= 0 && (flags & O_APPEND) == 0) {
 		flags |= O_APPEND;