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-rw-r--r--shell/ash.c29
-rw-r--r--shell/ash_test/ash-heredoc/heredoc_side_effects.right1
-rwxr-xr-xshell/ash_test/ash-heredoc/heredoc_side_effects.tests5
3 files changed, 22 insertions, 13 deletions
diff --git a/shell/ash.c b/shell/ash.c
index 5fb67c0fa..01346108a 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -5444,22 +5444,29 @@ stoppedjobs(void)
* the pipe without forking.
*/
/* openhere needs this forward reference */
-static void expandhere(union node *arg, int fd);
+static void expandhere(union node *arg);
static int
openhere(union node *redir)
{
+ char *p;
int pip[2];
size_t len = 0;
if (pipe(pip) < 0)
ash_msg_and_raise_perror("can't create pipe");
- if (redir->type == NHERE) {
- len = strlen(redir->nhere.doc->narg.text);
- if (len <= PIPE_BUF) {
- full_write(pip[1], redir->nhere.doc->narg.text, len);
- goto out;
- }
+
+ p = redir->nhere.doc->narg.text;
+ if (redir->type == NXHERE) {
+ expandhere(redir->nhere.doc);
+ p = stackblock();
}
+
+ len = strlen(p);
+ if (len <= PIPE_BUF) {
+ xwrite(pip[1], p, len);
+ goto out;
+ }
+
if (forkshell((struct job *)NULL, (union node *)NULL, FORK_NOJOB) == 0) {
/* child */
close(pip[0]);
@@ -5468,10 +5475,7 @@ openhere(union node *redir)
ignoresig(SIGHUP); //signal(SIGHUP, SIG_IGN);
ignoresig(SIGTSTP); //signal(SIGTSTP, SIG_IGN);
signal(SIGPIPE, SIG_DFL);
- if (redir->type == NHERE)
- full_write(pip[1], redir->nhere.doc->narg.text, len);
- else /* NXHERE */
- expandhere(redir->nhere.doc, pip[1]);
+ xwrite(pip[1], p, len);
_exit(EXIT_SUCCESS);
}
out:
@@ -8016,10 +8020,9 @@ expandarg(union node *arg, struct arglist *arglist, int flag)
* Expand shell variables and backquotes inside a here document.
*/
static void
-expandhere(union node *arg, int fd)
+expandhere(union node *arg)
{
expandarg(arg, (struct arglist *)NULL, EXP_QUOTED);
- full_write(fd, stackblock(), expdest - (char *)stackblock());
}
/*
diff --git a/shell/ash_test/ash-heredoc/heredoc_side_effects.right b/shell/ash_test/ash-heredoc/heredoc_side_effects.right
new file mode 100644
index 000000000..53b2c03c1
--- /dev/null
+++ b/shell/ash_test/ash-heredoc/heredoc_side_effects.right
@@ -0,0 +1 @@
+NO BUG
diff --git a/shell/ash_test/ash-heredoc/heredoc_side_effects.tests b/shell/ash_test/ash-heredoc/heredoc_side_effects.tests
new file mode 100755
index 000000000..3fb622ae4
--- /dev/null
+++ b/shell/ash_test/ash-heredoc/heredoc_side_effects.tests
@@ -0,0 +1,5 @@
+unset a
+cat <<EOF >/dev/null
+${a=NO}
+EOF
+echo $a BUG