hush: fix bug 207 and "hush -c" parameter passing.

 Now hush -c 'printf "%s\n" "$@"' (prints "\n")
 and hush -c 'printf "%s\n" "$@"' qwe asd (prints "asd\n")
 both work correctly

3 files changed, 16 insertions, 2 deletions

diff --git a/shell/hush.c b/shell/hush.c
index e6189f841..bfd487cfb 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -1219,8 +1219,13 @@ static int o_glob(o_string *o, int n)
  * Otherwise, just finish current list[] and start new */
 static int o_save_ptr(o_string *o, int n)
 {
-        if (o->o_glob)
-                return o_glob(o, n); /* o_save_ptr_helper is inside */
+        if (o->o_glob) { /* if globbing is requested */
+                /* If o->has_empty_slot, list[n] was already globbed
+                 * (if it was requested back then when it was filled)
+                 * so don't do that again! */
+                if (!o->has_empty_slot)
+                        return o_glob(o, n); /* o_save_ptr_helper is inside */
+        }
         return o_save_ptr_helper(o, n);
 }
 
@@ -4285,6 +4290,11 @@ int hush_main(int argc, char **argv)
                 switch (opt) {
                 case 'c':
                         G.global_argv = argv + optind;
+                        if (!argv[optind]) {
+                                /* -c 'script' (no params): prevent empty $0 */
+                                *--G.global_argv = argv[0];
+                                optind--;
+                        } /* else -c 'script' PAR0 PAR1: $0 is PAR0 */
                         G.global_argc = argc - optind;
                         opt = parse_and_run_string(optarg, 0 /* parse_flag */);
                         goto final_return;
diff --git a/shell/hush_test/hush-parsing/starquoted2.right b/shell/hush_test/hush-parsing/starquoted2.right
index 46f24369e..f4624dad5 100644
--- a/shell/hush_test/hush-parsing/starquoted2.right
+++ b/shell/hush_test/hush-parsing/starquoted2.right
@@ -1,2 +1,3 @@
 Should be printed
 Should be printed
+Empty:
diff --git a/shell/hush_test/hush-parsing/starquoted2.tests b/shell/hush_test/hush-parsing/starquoted2.tests
index 782d71b88..3475edeb2 100755
--- a/shell/hush_test/hush-parsing/starquoted2.tests
+++ b/shell/hush_test/hush-parsing/starquoted2.tests
@@ -12,3 +12,6 @@ for a in "$@"""; do echo Should not be printed; done
 for a in """$@"; do echo Should not be printed; done
 for a in """$@"''"$@"''; do echo Should not be printed; done
 for a in ""; do echo Should be printed; done
+
+# Bug 207: "$@" expands to nothing, and we erroneously glob "%s\\n" twice:
+printf "Empty:%s\\n" "$@"