hush: move shell_ver from globals to main's stack.

function                                             old     new   delta
hush_main                                            995    1011     +16
pseudo_exec_argv                                     253     251      -2
execvp_or_die                                         50      48      -2
maybe_set_to_sigexit                                  50      47      -3
hush_exit                                             78      75      -3
builtin_wait                                         274     271      -3
check_and_run_traps                                  205     200      -5
init_sigmasks                                        214     190     -24
builtin_trap                                         465     441     -24
reset_traps_to_defaults                              238     211     -27
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/9 up/down: 16/-93)            Total: -77 bytes

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

1 files changed, 9 insertions, 8 deletions

diff --git a/shell/hush.c b/shell/hush.c
index a888332bc..6e36078c2 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -707,8 +707,7 @@ struct globals {
 #endif
         const char *ifs;
         const char *cwd;
-        struct variable *top_var; /* = &G.shell_ver (set in main()) */
-        struct variable shell_ver;
+        struct variable *top_var;
         char **expanded_assignments;
 #if ENABLE_HUSH_FUNCTIONS
         struct function *top_func;
@@ -7337,6 +7336,7 @@ int hush_main(int argc, char **argv)
         unsigned builtin_argc;
         char **e;
         struct variable *cur_var;
+        struct variable shell_ver;
 
         INIT_G();
         if (EXIT_SUCCESS) /* if EXIT_SUCCESS == 0, it is already done */
@@ -7345,12 +7345,13 @@ int hush_main(int argc, char **argv)
         G.argv0_for_re_execing = argv[0];
 #endif
         /* Deal with HUSH_VERSION */
-        G.shell_ver.flg_export = 1;
-        G.shell_ver.flg_read_only = 1;
+        memset(&shell_ver, 0, sizeof(shell_ver));
+        shell_ver.flg_export = 1;
+        shell_ver.flg_read_only = 1;
         /* Code which handles ${var<op>...} needs writable values for all variables,
          * therefore we xstrdup: */
-        G.shell_ver.varstr = xstrdup(hush_version_str),
-        G.top_var = &G.shell_ver;
+        shell_ver.varstr = xstrdup(hush_version_str),
+        G.top_var = &shell_ver;
         /* Create shell local variables from the values
          * currently living in the environment */
         debug_printf_env("unsetenv '%s'\n", "HUSH_VERSION");
@@ -7369,8 +7370,8 @@ int hush_main(int argc, char **argv)
                 e++;
         }
         /* (Re)insert HUSH_VERSION into env (AFTER we scanned the env!) */
-        debug_printf_env("putenv '%s'\n", G.shell_ver.varstr);
-        putenv(G.shell_ver.varstr);
+        debug_printf_env("putenv '%s'\n", shell_ver.varstr);
+        putenv(shell_ver.varstr);
 
         /* Export PWD */
         set_pwd_var(/*exp:*/ 1);