hush: make export builtin optional

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

diff --git a/shell/hush.c b/shell/hush.c
index a713a9680a86985a31bce7d127eaa282edf54e70..153867614aceee0c3728a9770ebc4ed30a9f1f82 100644 (file)
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -187,13 +187,6 @@
 //config:        Enable pseudorandom generator and dynamic variable "$RANDOM".
 //config:        Each read of "$RANDOM" will generate a new pseudorandom value.
 //config:
-//config:config HUSH_EXPORT_N
-//config:      bool "Support 'export -n' option"
-//config:      default y
-//config:      depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH
-//config:      help
-//config:        export -n unexports variables. It is a bash extension.
-//config:
 //config:config HUSH_MODE_X
 //config:      bool "Support 'hush -x' option and 'set -x' command"
 //config:      default y
@@ -202,6 +195,20 @@
 //config:        This instructs hush to print commands before execution.
 //config:        Adds ~300 bytes.
 //config:
+//config:config HUSH_EXPORT
+//config:      bool "export builtin"
+//config:      default y
+//config:      depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH
+//config:      help
+//config:        Enable export builtin in hush.
+//config:
+//config:config HUSH_EXPORT_N
+//config:      bool "Support 'export -n' option"
+//config:      default y
+//config:      depends on HUSH_EXPORT
+//config:      help
+//config:        export -n unexports variables. It is a bash extension.
+//config:
 //config:config HUSH_HELP
 //config:      bool "help builtin"
 //config:      default y
@@ -917,7 +924,9 @@ static int builtin_echo(char **argv) FAST_FUNC;
 static int builtin_eval(char **argv) FAST_FUNC;
 static int builtin_exec(char **argv) FAST_FUNC;
 static int builtin_exit(char **argv) FAST_FUNC;
+#if ENABLE_HUSH_EXPORT
 static int builtin_export(char **argv) FAST_FUNC;
+#endif
 #if ENABLE_HUSH_JOB
 static int builtin_fg_bg(char **argv) FAST_FUNC;
 static int builtin_jobs(char **argv) FAST_FUNC;
@@ -1007,7 +1016,9 @@ static const struct built_in_command bltins1[] = {
        BLTIN("eval"     , builtin_eval    , "Construct and run shell command"),
        BLTIN("exec"     , builtin_exec    , "Execute command, don't return to shell"),
        BLTIN("exit"     , builtin_exit    , "Exit"),
+#if ENABLE_HUSH_EXPORT
        BLTIN("export"   , builtin_export  , "Set environment variables"),
+#endif
 #if ENABLE_HUSH_JOB
        BLTIN("fg"       , builtin_fg_bg   , "Bring job into the foreground"),
 #endif
@@ -8935,10 +8946,11 @@ static void print_escaped(const char *s)
        } while (*s);
 }
 
-#if !ENABLE_HUSH_LOCAL
+#if ENABLE_HUSH_EXPORT || ENABLE_HUSH_LOCAL
+# if !ENABLE_HUSH_LOCAL
 #define helper_export_local(argv, exp, lvl) \
        helper_export_local(argv, exp)
-#endif
+# endif
 static void helper_export_local(char **argv, int exp, int lvl)
 {
        do {
@@ -8971,14 +8983,14 @@ static void helper_export_local(char **argv, int exp, int lvl)
                                        continue;
                                }
                        }
-#if ENABLE_HUSH_LOCAL
+# if ENABLE_HUSH_LOCAL
                        if (exp == 0 /* local? */
                         && var && var->func_nest_level == lvl
                        ) {
                                /* "local x=abc; ...; local x" - ignore second local decl */
                                continue;
                        }
-#endif
+# endif
                        /* Exporting non-existing variable.
                         * bash does not put it in environment,
                         * but remembers that it is exported,
@@ -8994,7 +9006,9 @@ static void helper_export_local(char **argv, int exp, int lvl)
                set_local_var(name, /*exp:*/ exp, /*lvl:*/ lvl, /*ro:*/ 0);
        } while (*++argv);
 }
+#endif
 
+#if ENABLE_HUSH_EXPORT
 static int FAST_FUNC builtin_export(char **argv)
 {
        unsigned opt_unexport;
@@ -9040,6 +9054,7 @@ static int FAST_FUNC builtin_export(char **argv)
 
        return EXIT_SUCCESS;
 }
+#endif
 
 #if ENABLE_HUSH_LOCAL
 static int FAST_FUNC builtin_local(char **argv)