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-rw-r--r--shell/hush.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/shell/hush.c b/shell/hush.c
index cbec2dd..5daca96 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -2646,7 +2646,9 @@ static int setup_redirects(struct command *prog, int squirrel[])
for (redir = prog->redirects; redir; redir = redir->next) {
if (redir->rd_type == REDIRECT_HEREDOC2) {
/* rd_fd<<HERE case */
- if (squirrel && redir->rd_fd < 3) {
+ if (squirrel && redir->rd_fd < 3
+ && squirrel[redir->rd_fd] < 0
+ ) {
squirrel[redir->rd_fd] = dup(redir->rd_fd);
}
/* for REDIRECT_HEREDOC2, rd_filename holds _contents_
@@ -2682,7 +2684,9 @@ static int setup_redirects(struct command *prog, int squirrel[])
}
if (openfd != redir->rd_fd) {
- if (squirrel && redir->rd_fd < 3) {
+ if (squirrel && redir->rd_fd < 3
+ && squirrel[redir->rd_fd] < 0
+ ) {
squirrel[redir->rd_fd] = dup(redir->rd_fd);
}
if (openfd == REDIRFD_CLOSE) {