diff options
| author | Denys Vlasenko <vda.linux@googlemail.com> | 2020-02-16 19:02:22 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2020-02-16 19:24:33 +0100 |
| commit | e368d851e78a2eb2aee50b8bad29dcc301feec65 (patch) | |
| tree | 7a047d689cc8fe4c0890ad95fb088ecca8df72c3 | |
| parent | 4ace38580927b3b402b6b35ab50893dbfd5f77c3 (diff) | |
| download | busybox-e368d851e78a2eb2aee50b8bad29dcc301feec65.tar.gz | |
ash: eval: Use the correct expansion mode for fd redirection
Upstream comment:
Date: Mon, 19 Nov 2018 18:00:32 +0800
eval: Use the correct expansion mode for fd redirection
It has been reported that
echo test >&$EMPTY_VARIABLE
causes dash to segfault. This is a symptom of the bigger problem
that dash tries to perform pathname expansion as well as field
splitting on the word after >& and <&. This is wrong and this
patch fixes it to use the same expansions as done on a normal
redirection.
Reported-by: Andrej Shadura <andrew.shadura@collabora.co.uk>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | shell/ash.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/shell/ash.c b/shell/ash.c index 97c7f4ef5..a43b65680 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -9445,11 +9445,10 @@ expredir(union node *n) case NFROMFD: case NTOFD: /* >& */ if (redir->ndup.vname) { - expandarg(redir->ndup.vname, &fn, EXP_FULL | EXP_TILDE); + expandarg(redir->ndup.vname, &fn, EXP_TILDE | EXP_REDIR); if (fn.list == NULL) ash_msg_and_raise_error("redir error"); #if BASH_REDIR_OUTPUT -//FIXME: we used expandarg with different args! if (!isdigit_str9(fn.list->text)) { /* >&file, not >&fd */ if (redir->nfile.fd != 1) /* 123>&file - BAD */ |