busybox: fix existing "export -n" in ash

Minor fix to existing patch which did not correctly implement -n support for the export command in ash. The VEXPORT flag of a variable was set in the first call to setvareq() and then remained set in the subsequent call, because the variable already existed in the environment.

Although /lib/functions.sh by default does not export variables (NO_EXPORT=1), this issue was leading to dirty environments.

Without this fix:
(ash) export A=1; export -n B=2; /bin/ash -c "echo \$A, \$B"
1, 2

With this fix:
(ash) export A=1; export -n B=2; /bin/ash -c "echo \$A, \$B"
1,

Signed-off-by: Christophe Lermytte <openwrt@lermytte.be>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39968 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/utils/busybox/patches/250-ash_export-n.patch b/package/utils/busybox/patches/250-ash_export-n.patch
index 048c236..ddbe74e 100644 (file)
--- a/package/utils/busybox/patches/250-ash_export-n.patch
+++ b/package/utils/busybox/patches/250-ash_export-n.patch
@@ -19,7 +19,7 @@
                aptr = argptr;
                name = *aptr;
                if (name) {
-@@ -12624,10 +12633,12 @@ exportcmd(int argc UNUSED_PARAM, char **
+@@ -12624,10 +12633,11 @@ exportcmd(int argc UNUSED_PARAM, char **
                                        vp = *findvar(hashvar(name), name);
                                        if (vp) {
                                                vp->flags |= flag;
@@ -27,7 +27,7 @@
                                                continue;
                                        }
                                }
-                               setvar(name, p, flag);
+-                              setvar(name, p, flag);
 +                              setvar(name, p, flag & mask);
                        } while ((name = *++aptr) != NULL);
                        return 0;