X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=file_write.c;h=7497dfaa0f00e6be8c8856a2659bcaaa65938100;hp=4a4dc66e52d61b2a5e632bbadd67f26a5f42ed27;hb=7d037b0b440e1913776650dbe35dbac6d5cfb5d5;hpb=12123ab5a95a0f31385e9615d36056cb6546aced

diff --git a/file_write.c b/file_write.c
index 4a4dc66e..7497dfaa 100644
--- a/file_write.c
+++ b/file_write.c
@@ -52,9 +52,17 @@ __must_check __malloc static char *random_filename(void)
 
 static int file_write_open(struct writer_node *wn)
 {
-	struct private_file_write_data *pfwd = para_calloc(
-		sizeof(struct private_file_write_data));
+	struct private_file_write_data *pfwd = para_calloc(sizeof(*pfwd));
+
+	wn->private_data = pfwd;
+	pfwd->fd = -1;
+	return 0;
+}
+
+static int prepare_output_file(struct writer_node *wn)
+{
 	struct file_write_args_info *conf = wn->conf;
+	struct private_file_write_data *pfwd = wn->private_data;
 	char *filename;
 	int ret;
 
@@ -62,7 +70,6 @@ static int file_write_open(struct writer_node *wn)
 		filename = conf->filename_arg;
 	else
 		filename = random_filename();
-	wn->private_data = pfwd;
 	ret = para_open(filename, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
 	if (!conf->filename_given)
 		free(filename);
@@ -86,9 +93,9 @@ static void file_write_pre_select(struct sched *s, struct task *t)
 
 	t->error = 0;
 	ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
-	if (ret > 0)
+	if (ret > 0 && pfwd->fd >= 0)
 		para_fd_set(pfwd->fd, &s->wfds, &s->max_fileno);
-	else if (ret < 0)
+	else if (ret != 0) /* error or bos and fd not yet open */
 		sched_min_delay(s);
 }
 
@@ -96,7 +103,8 @@ static void file_write_close(struct writer_node *wn)
 {
 	struct private_file_write_data *pfwd = wn->private_data;
 
-	close(pfwd->fd);
+	if (pfwd->fd >= 0)
+		close(pfwd->fd);
 	free(pfwd);
 }
 
@@ -114,6 +122,11 @@ static void file_write_post_select(__a_unused struct sched *s,
 	ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
 	if (ret <= 0)
 		goto out;
+	if (pfwd->fd < 0) {
+		ret = prepare_output_file(wn);
+		if (ret < 0)
+			goto out;
+	}
 	if (!FD_ISSET(pfwd->fd, &s->wfds))
 		return;
 	bytes = btr_next_buffer(btrn, &buf);