* localtime.c (TZLOAD_FROMENV): Add comments to try to clear up
confusion noted in <https://github.com/freebsd/freebsd-src/pull/2395>.
---
localtime.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/localtime.c b/localtime.c
index 608ddaa6..7c06e370 100644
--- a/localtime.c
+++ b/localtime.c
@@ -895,9 +895,19 @@ union local_storage {
};
/* These tzload flags can be ORed together, and fit into 'char'. */
-enum { TZLOAD_FROMENV = 1 }; /* The TZ string came from the environment. */
-enum { TZLOAD_TZSTRING = 2 }; /* Read any newline-surrounded TZ string. */
-enum { TZLOAD_TZDIR_SUB = 4 }; /* TZ should be a file under TZDIR. */
+
+/* TZLOAD_FROMENV means the TZ string is a process-wide setting either
+ taken from the TZ environment variable or inferred from TZ being unset.
+ When 0 <= tz_change_interval, TZLOAD_FROMENV lets us skip reanalysis
+ of a TZif file that did not change during the interval. */
+enum { TZLOAD_FROMENV = 1 };
+
+/* Read any newline-surrounded TZ string. */
+enum { TZLOAD_TZSTRING = 2 };
+
+/* TZ should be a file under TZDIR. */
+enum { TZLOAD_TZDIR_SUB = 4 };
+
/* Load tz data from the file named NAME into *SP. Respect TZLOADFLAGS.
Use **LSPP for temporary storage. Return 0 on
--
2.53.0
