hush: add a comment where we differ from bash wrt heredoc EOF mark handling

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

3 files changed, 8 insertions, 15 deletions

diff --git a/shell/hush.c b/shell/hush.c
index 4b8641d19..1921932d1 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -3861,6 +3861,13 @@ static int done_word(o_string *word, struct parse_context *ctx)
                  * shell may perform it, but shall do so only when
                  * the expansion would result in one word."
                  */
+//bash does not do parameter/command substitution or arithmetic expansion
+//for _heredoc_ redirection word: these constructs look for exact eof marker
+// as written:
+// <<EOF$t
+// <<EOF$((1))
+// <<EOF`true`  [this case also makes heredoc "quoted", a-la <<"EOF"]
+//This contradicts the above docs.
                 ctx->pending_redirect->rd_filename = xstrdup(word->data);
                 /* Cater for >\file case:
                  * >\a creates file a; >\\a, >"\a", >"\\a" create file \a
@@ -4228,6 +4235,7 @@ static int fetch_heredocs(int heredoc_cnt, struct parse_context *ctx, struct in_
 
                                         redir->rd_type = REDIRECT_HEREDOC2;
                                         /* redir->rd_dup is (ab)used to indicate <<- */
+bb_error_msg("redir->rd_filename:'%s'",  redir->rd_filename);
                                         p = fetch_till_str(&ctx->as_string, input,
                                                         redir->rd_filename, redir->rd_dup);
                                         if (!p) {
diff --git a/shell/hush_test/hush-heredoc/heredoc_backquote1.right b/shell/hush_test/hush-heredoc/heredoc_backquote1.right
deleted file mode 100644
index 0be2a3296..000000000
--- a/shell/hush_test/hush-heredoc/heredoc_backquote1.right
+++ /dev/null
@@ -1,5 +0,0 @@
-heredoc1
-Ok1:0
-heredoc2
-EO`false`F
-Ok2:0
diff --git a/shell/hush_test/hush-heredoc/heredoc_backquote1.tests b/shell/hush_test/hush-heredoc/heredoc_backquote1.tests
deleted file mode 100755
index ec3d8fe1d..000000000
--- a/shell/hush_test/hush-heredoc/heredoc_backquote1.tests
+++ /dev/null
@@ -1,10 +0,0 @@
-cat <<EO`true`F
-heredoc1
-EO`true`F
-echo Ok1:$?
-
-cat <<EO`true`F
-heredoc2
-EO`false`F
-EO`true`F
-echo Ok2:$?