env: support -uVAR=VAL

[oweals/busybox.git] / coreutils / env.c

diff --git a/coreutils/env.c b/coreutils/env.c
index 2f8c8b71d047dc1ed43c159356bc22decac3509a..f50a03e8b683b868f2fdf05d22f428208a3f52e8 100644 (file)
--- a/coreutils/env.c
+++ b/coreutils/env.c
@@ -43,8 +43,6 @@ static const char env_longopts[] ALIGN1 =
 int env_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int env_main(int argc UNUSED_PARAM, char **argv)
 {
-       /* cleanenv was static - why? */
-       char *cleanenv[1];
        char **ep;
        unsigned opt;
        llist_t *unset_env = NULL;
@@ -60,12 +58,16 @@ int env_main(int argc UNUSED_PARAM, char **argv)
                ++argv;
        }
        if (opt & 1) {
-               cleanenv[0] = NULL;
-               environ = cleanenv;
-       } else {
-               while (unset_env) {
-                       unsetenv(llist_pop(&unset_env));
-               }
+               clearenv();
+       }
+       while (unset_env) {
+               char *var = llist_pop(&unset_env);
+               /* This does not handle -uVAR=VAL
+                * (coreutils _sets_ the variable in that case): */
+               /*unsetenv(var);*/
+               /* This does, but uses somewhan undocumented feature that
+                * putenv("name_without_equal_sign") unsets the variable: */
+               putenv(var);
        }
 
        while (*argv && (strchr(*argv, '=') != NULL)) {