[PARSER] Do not show prompts in expandstr

Once I fixed the previous problem it became apparent that we never dealt
with prompts with new-lines in them correctly.  The problem is that we
showed a secondary prompt for each of them.

This patch disables prompt generation in expandstr.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/parser.c b/src/parser.c
index 3206328..9dd6185 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -1499,10 +1499,18 @@ const char *
 expandstr(const char *ps)
 {
 	union node n;
+	int saveprompt;
 
 	/* XXX Fix (char *) cast. */
 	setinputstring((char *)ps);
+
+	saveprompt = doprompt;
+	doprompt = 0;
+
 	readtoken1(pgetc(), DQSYNTAX, FAKEEOFMARK, 0);
+
+	doprompt = saveprompt;
+
 	popfile();
 
 	n.narg.type = NARG;