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hush: update information comment about heredoc discrepancy

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-04-01 20:11:23 +02:00
parent 899ae5337a
commit e84212f834
1 changed files with 12 additions and 7 deletions
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19
shell/hush.c
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@ -3851,12 +3851,17 @@ static int done_word(o_string *word, struct parse_context *ctx)
if (ctx->pending_redirect) {
/* We do not glob in e.g. >*.tmp case. bash seems to glob here
* only if run as "bash", not "sh" */
/* http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html
/* http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html
* "2.7 Redirection
* ...the word that follows the redirection operator
* shall be subjected to tilde expansion, parameter expansion,
* command substitution, arithmetic expansion, and quote
* removal. Pathname expansion shall not be performed
* If the redirection operator is "<<" or "<<-", the word
* that follows the redirection operator shall be
* subjected to quote removal; it is unspecified whether
* any of the other expansions occur. For the other
* redirection operators, the word that follows the
* redirection operator shall be subjected to tilde
* expansion, parameter expansion, command substitution,
* arithmetic expansion, and quote removal.
* Pathname expansion shall not be performed
* on the word by a non-interactive shell; an interactive
* shell may perform it, but shall do so only when
* the expansion would result in one word."
@ -3866,8 +3871,8 @@ static int done_word(o_string *word, struct parse_context *ctx)
// as written:
// <<EOF$t
// <<EOF$((1))
// <<EOF`true` [this case also makes heredoc "quoted", a-la <<"EOF"]
//This contradicts the above docs.
// <<EOF`true` [this case also makes heredoc "quoted", a-la <<"EOF". Probably bash-4.3.43 bug]
ctx->pending_redirect->rd_filename = xstrdup(word->data);
/* Cater for >\file case:
* >\a creates file a; >\\a, >"\a", >"\\a" create file \a