ash: add a comment about VEXPORT

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/shell/ash.c b/shell/ash.c
index e23b2034d..b20c32b89 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -1900,6 +1900,10 @@ static const struct {
         const char *var_text;
         void (*var_func)(const char *) FAST_FUNC;
 } varinit_data[] = {
+        /*
+         * Note: VEXPORT would not work correctly here for NOFORK applets:
+         * some environment strings may be constant.
+         */
         { VSTRFIXED|VTEXTFIXED       , defifsvar   , NULL            },
 #if ENABLE_ASH_MAIL
         { VSTRFIXED|VTEXTFIXED|VUNSET, "MAIL"      , changemail      },