From cc978da33e8b56d9901d1bec26c6bb4cece9bd69 Mon Sep 17 00:00:00 2001
From: Pawel Szewczyk <p.szewczyk@samsung.com>
Date: Wed, 8 Jul 2015 15:24:13 +0200
Subject: [PATCH] gadget: Add gadget save at libusbg backend

Signed-off-by: Pawel Szewczyk <p.szewczyk@samsung.com>

Use 0 instead of NULL to check for stat() result.

Change-Id: I7d3c0fc942df05bd642bc6287c3d6a83f0140f6f
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
---
 source/gadget/src/gadget.c         | 15 +++++++-
 source/gadget/src/gadget_libusbg.c | 72 +++++++++++++++++++++++++++++++++++++-
 2 files changed, 85 insertions(+), 2 deletions(-)

diff --git a/source/gadget/src/gadget.c b/source/gadget/src/gadget.c
index d346fd7..ac536bd 100644
--- a/source/gadget/src/gadget.c
+++ b/source/gadget/src/gadget.c
@@ -617,7 +617,17 @@ static void gt_gadget_save_destructor(void *data)
 
 static int gt_gadget_save_help(void *data)
 {
-	printf("Gadget save help.\n");
+	printf("usage: %s save <gadget> [name]\n"
+	       "Stores the gadget configuration in system templates as name. If name\n"
+	       "not specified gadget's name is used. Sets the template attributes to\n"
+	       "given values.\n"
+	       "Options:\n"
+	       "  -f --force\t\toverride gadget template if exist\n"
+	       "  --file=<gadget_file>\tstores in file\n"
+	       "  --stdout\t\tprints the configuration to standard output\n"
+	       "  --path=<path>\t\tstores gadget in given path instead of default\n"
+	       "  -h, --help\t\tPrint this help\n",
+	       program_name);
 	return -1;
 }
 
@@ -688,6 +698,9 @@ static void gt_parse_gadget_save(const Command *cmd, int argc,
 	if (c < 0)
 		goto out;
 
+	if (dt->name == NULL)
+		dt->name = dt->gadget;
+
 	executable_command_set(exec, GET_EXECUTABLE(save), (void *)dt,
 		gt_gadget_save_destructor);
 
diff --git a/source/gadget/src/gadget_libusbg.c b/source/gadget/src/gadget_libusbg.c
index 030ba70..4094d0e 100644
--- a/source/gadget/src/gadget_libusbg.c
+++ b/source/gadget/src/gadget_libusbg.c
@@ -446,6 +446,76 @@ out:
 	return ret;
 }
 
+static int save_func(void *data)
+{
+	struct gt_gadget_save_data *dt;
+	const char *filename = NULL;
+	FILE *fp = NULL;
+	char buf[PATH_MAX];
+	usbg_gadget *g;
+	struct stat st;
+	int ret;
+
+	dt = (struct gt_gadget_save_data *)data;
+
+	if (dt->opts & GT_STDOUT) {
+		fp = stdout;
+	} else if (dt->file) {
+		filename = dt->file;
+	} else if (dt->path) {
+		ret = snprintf(buf, sizeof(buf), "%s/%s", dt->path, dt->name);
+		if (ret >= sizeof(buf)) {
+			fprintf(stderr, "path too long\n");
+			return -1;
+		}
+
+		filename = buf;
+	} else if (gt_settings.default_template_path) {
+		ret = snprintf(buf, sizeof(buf), "%s/%s",
+				gt_settings.default_template_path, dt->name);
+		if (ret >= sizeof(buf)) {
+			fprintf(stderr, "path too long\n");
+			return -1;
+		}
+
+		filename = buf;
+	} else {
+		fprintf(stderr, "Path not specified\n");
+		return -1;
+	}
+
+	g = usbg_get_gadget(backend_ctx.libusbg_state, dt->gadget);
+	if (!g) {
+		fprintf(stderr, "Error on get gadget\n");
+		return -1;
+	}
+
+	if (fp == NULL) {
+		if (!(dt->opts & GT_FORCE) && stat(filename, &st) == 0) {
+			fprintf(stderr, "File exists.\n");
+			return -1;
+		}
+
+		fp = fopen(filename, "w");
+		if (fp == NULL) {
+			perror("Error opening file\n");
+			return -1;
+		}
+	}
+
+	ret = usbg_export_gadget(g, fp);
+	if (ret != USBG_SUCCESS) {
+		fprintf(stderr, "Error on export gadget\n");
+		fprintf(stderr, "Error: %s : %s\n", usbg_error_name(ret),
+				usbg_strerror(ret));
+		goto out;
+	}
+
+out:
+	fclose(fp);
+	return ret;
+}
+
 struct gt_gadget_backend gt_gadget_backend_libusbg = {
 	.create = create_func,
 	.rm = rm_func,
@@ -455,7 +525,7 @@ struct gt_gadget_backend gt_gadget_backend_libusbg = {
 	.disable = disable_func,
 	.gadget = gadget_func,
 	.load = load_func,
-	.save = NULL,
+	.save = save_func,
 	.template_default = NULL,
 	.template_get = NULL,
 	.template_set = NULL,
-- 
2.7.4