From 51e2d88d6e513150a76c007111bbee21bb922c33 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Sat, 19 May 2018 02:39:42 +0800 Subject: parser: Save/restore here-documents in command substitution This patch changes the parsing of here-documents within command substitution, both old style and new style. In particular, the original here-document list is saved upon the beginning of parsing command substitution and restored when exiting. This means that here-documents outside of command substitution can no longer be filled by text within it and vice-versa. Signed-off-by: Herbert Xu --- src/parser.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/src/parser.c b/src/parser.c index 8bd3db4..809c6a8 100644 --- a/src/parser.c +++ b/src/parser.c @@ -1368,6 +1368,7 @@ parsebackq: { union node *n; char *str; size_t savelen; + struct heredoc *saveheredoclist; int uninitialized_var(saveprompt); str = NULL; @@ -1432,6 +1433,9 @@ done: *nlpp = (struct nodelist *)stalloc(sizeof (struct nodelist)); (*nlpp)->next = NULL; + saveheredoclist = heredoclist; + heredoclist = NULL; + if (oldstyle) { saveprompt = doprompt; doprompt = 0; @@ -1444,17 +1448,18 @@ done: else { if (readtoken() != TRP) synexpect(TRP); + setinputstring(nullstr); + parseheredoc(); } + heredoclist = saveheredoclist; + (*nlpp)->n = n; - if (oldstyle) { - /* - * Start reading from old file again, ignoring any pushed back - * tokens left from the backquote parsing - */ - popfile(); + /* Start reading from old file again. */ + popfile(); + /* Ignore any pushed back tokens left from the backquote parsing. */ + if (oldstyle) tokpushback = 0; - } while (stackblocksize() <= savelen) growstackblock(); STARTSTACKSTR(out); -- cgit 1.4.1