[Suspend2][ 17/19] [Suspend2] Get image_exists data.

[Nigel Cunningham <nigel@suspend2.net>]

Get information for the image_exists proc entry.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

 kernel/power/io.c |   38 ++++++++++++++++++++++++++++++++++++++
 1 files changed, 38 insertions(+), 0 deletions(-)

diff --git a/kernel/power/io.c b/kernel/power/io.c
index 79cf54f..cd99bd8 100644
--- a/kernel/power/io.c
+++ b/kernel/power/io.c
@@ -933,3 +933,41 @@ int read_pageset1(void)
 	return error;
 }
 
+/*
+ * get_have_image_data()
+ */
+char *get_have_image_data(void)
+{
+	char *output_buffer = (char *) get_zeroed_page(GFP_ATOMIC);
+	struct suspend_header *suspend_header;
+
+	if (!output_buffer) {
+		printk("Output buffer null.\n");
+		return NULL;
+	}
+
+	/* Check for an image */
+	if (!suspend_active_writer->image_exists() ||
+	    suspend_active_writer->read_header_init() ||
+	    suspend_active_writer->rw_header_chunk(READ, NULL,
+			output_buffer, sizeof(struct suspend_header)) !=
+	    		sizeof(struct suspend_header)) {
+		sprintf(output_buffer, "0\n");
+		goto out;
+	}
+
+	suspend_header = (struct suspend_header *) output_buffer;
+
+	sprintf(output_buffer, "1\n%s\n%s\n",
+			suspend_header->machine,
+			suspend_header->version);
+
+	/* Check whether we've resumed before */
+	if (test_suspend_state(SUSPEND_RESUMED_BEFORE))
+		strcat(output_buffer, "Resumed before.\n");
+
+out:
+	noresume_reset_modules();
+	return output_buffer;
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/