hush: add a comment where we differ from bash wrt heredoc EOF mark handling
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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@ -3861,6 +3861,13 @@ static int done_word(o_string *word, struct parse_context *ctx)
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* shell may perform it, but shall do so only when
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* the expansion would result in one word."
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*/
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//bash does not do parameter/command substitution or arithmetic expansion
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//for _heredoc_ redirection word: these constructs look for exact eof marker
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// as written:
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// <<EOF$t
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// <<EOF$((1))
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// <<EOF`true` [this case also makes heredoc "quoted", a-la <<"EOF"]
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//This contradicts the above docs.
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ctx->pending_redirect->rd_filename = xstrdup(word->data);
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/* Cater for >\file case:
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* >\a creates file a; >\\a, >"\a", >"\\a" create file \a
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@ -4228,6 +4235,7 @@ static int fetch_heredocs(int heredoc_cnt, struct parse_context *ctx, struct in_
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redir->rd_type = REDIRECT_HEREDOC2;
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/* redir->rd_dup is (ab)used to indicate <<- */
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bb_error_msg("redir->rd_filename:'%s'", redir->rd_filename);
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p = fetch_till_str(&ctx->as_string, input,
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redir->rd_filename, redir->rd_dup);
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if (!p) {
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@ -1,5 +0,0 @@
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heredoc1
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Ok1:0
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heredoc2
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EO`false`F
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Ok2:0
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@ -1,10 +0,0 @@
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cat <<EO`true`F
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heredoc1
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EO`true`F
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echo Ok1:$?
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cat <<EO`true`F
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heredoc2
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EO`false`F
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EO`true`F
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echo Ok2:$?
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