ash: add a comment about VEXPORT

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

diff --git a/shell/ash.c b/shell/ash.c
index e23b2034d373a7c07e3ddf7bb51918d479eb62fb..b20c32b89a0325f7e10f10e9cd5cfaec3179a882 100644 (file)
--- 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      },