[24/29] discover/paths: Add stdout callback parameter for load_url_async()

diff --git a/discover/boot.c b/discover/boot.c
index 5347fd7..da7b946 100644
--- a/discover/boot.c
+++ b/discover/boot.c
@@ -522,7 +522,8 @@  static int start_url_load(struct boot_task *task, const char *name,
 	if (!url)
 		return 0;
 
-	*result = load_url_async(task, url, boot_process, task);
+	*result = load_url_async(task, url, boot_process, task, NULL,
+				 task->status_arg);
 	if (!*result) {
 		update_status(task->status_fn, task->status_arg,
 				STATUS_ERROR, _("Error loading %s"), name);
diff --git a/discover/paths.c b/discover/paths.c
index 8d85619..ad42b5b 100644
--- a/discover/paths.c
+++ b/discover/paths.c
@@ -370,7 +370,8 @@  static void load_local(struct load_task *task)
  */
 
 struct load_url_result *load_url_async(void *ctx, struct pb_url *url,
-		load_url_complete async_cb, void *async_data)
+		load_url_complete async_cb, void *async_data,
+		waiter_cb stdout_cb, void *stdout_data)
 {
 	struct load_url_result *result;
 	struct load_task *task;
@@ -390,6 +391,14 @@  struct load_url_result *load_url_async(void *ctx, struct pb_url *url,
 		task->async_data = async_data;
 		task->process->exit_cb = load_url_process_exit;
 		task->process->data = task;
+		task->process->stdout_cb = stdout_cb;
+		task->process->stdout_data = stdout_data;
+	}
+
+	/* Make sure we save output for any task that has a custom handler */
+	if (task->process->stdout_cb) {
+		task->process->add_stderr = true;
+		task->process->keep_stdout = true;
 	}
 
 	switch (url->scheme) {
@@ -430,7 +439,7 @@  struct load_url_result *load_url_async(void *ctx, struct pb_url *url,
 
 struct load_url_result *load_url(void *ctx, struct pb_url *url)
 {
-	return load_url_async(ctx, url, NULL, NULL);
+	return load_url_async(ctx, url, NULL, NULL, NULL, NULL);
 }
 
 void load_url_async_cancel(struct load_url_result *res)
diff --git a/discover/paths.h b/discover/paths.h
index 191b8dc..35673b7 100644
--- a/discover/paths.h
+++ b/discover/paths.h
@@ -2,6 +2,8 @@ 
 #define PATHS_H
 
 #include <url/url.h>
+#include <waiter/waiter.h>
+#include <process/process.h>
 
 /**
  * Utility function for joining two paths. Adds a / between a and b if
@@ -43,7 +45,8 @@  typedef void (*load_url_complete)(struct load_url_result *result, void *data);
 
 /* Load a (potentially remote) file, and return a guaranteed-local name */
 struct load_url_result *load_url_async(void *ctx, struct pb_url *url,
-		load_url_complete complete, void *data);
+		load_url_complete complete, void *data,
+		waiter_cb stdout_cb, void *stdout_data);
 
 /* Cancel a pending load */
 void load_url_async_cancel(struct load_url_result *res);
diff --git a/discover/pxe-parser.c b/discover/pxe-parser.c
index eab6c6a..4c62aea 100644
--- a/discover/pxe-parser.c
+++ b/discover/pxe-parser.c
@@ -227,7 +227,8 @@  static void pxe_load_next_filename(struct conf_context *conf)
 		if (!url)
 			continue;
 
-		if (load_url_async(conf, url, pxe_conf_parse_cb, conf))
+		if (load_url_async(conf, url, pxe_conf_parse_cb, conf,
+				   NULL, NULL))
 			break;
 	}
 
@@ -380,7 +381,7 @@  static int pxe_parse(struct discover_context *dc)
 
 		/* we have a complete URL; use this and we're done. */
 		result = load_url_async(conf->dc, conf->dc->conf_url,
-					pxe_conf_parse_cb, conf);
+					pxe_conf_parse_cb, conf, NULL, ctx);
 		if (!result) {
 			pb_log("load_url_async fails for %s\n",
 					dc->conf_url->path);
diff --git a/test/parser/utils.c b/test/parser/utils.c
index 9d40d2b..8900bd7 100644
--- a/test/parser/utils.c
+++ b/test/parser/utils.c
@@ -310,7 +310,8 @@  int parser_replace_file(struct discover_context *ctx,
 }
 
 struct load_url_result *load_url_async(void *ctx, struct pb_url *url,
-		load_url_complete async_cb, void *async_data)
+		load_url_complete async_cb, void *async_data,
+		waiter_cb stdout_cb, void *stdout_data)
 {
 	struct conf_context *conf = async_data;
 	struct parser_test *test = conf->dc->test_data;
@@ -320,6 +321,10 @@  struct load_url_result *load_url_async(void *ctx, struct pb_url *url,
 	struct test_file *file;
 	int fd;
 
+	/* Ignore the stdout callback for tests */
+	(void)stdout_cb;
+	(void)stdout_data;
+
 	fd = mkstemp(tmp);
 
 	if (fd < 0)