fastboot: add fb_getvar
Add an fb_getvar helper that can be used to get values from the
target.
Change-Id: I0da088fcbc8d40076c7bf5ef6e5bbd97fae61471
diff --git a/fastboot/engine.c b/fastboot/engine.c
index 46b0828..7dc29e4 100644
--- a/fastboot/engine.c
+++ b/fastboot/engine.c
@@ -111,6 +111,20 @@
void generate_ext4_image(struct image_data *image);
void cleanup_image(struct image_data *image);
+int fb_getvar(struct usb_handle *usb, char *response, const char *fmt, ...)
+{
+ char cmd[CMD_SIZE] = "getvar:";
+ int getvar_len = strlen(cmd);
+ va_list args;
+
+ response[FB_RESPONSE_SZ] = '\0';
+ va_start(args, fmt);
+ vsnprintf(cmd + getvar_len, sizeof(cmd) - getvar_len, fmt, args);
+ va_end(args);
+ cmd[CMD_SIZE - 1] = '\0';
+ return fb_command_response(usb, cmd, response);
+}
+
struct generator {
char *fs_type;
@@ -278,9 +292,7 @@
unsigned i;
char cmd[CMD_SIZE];
- response[FB_RESPONSE_SZ] = '\0';
- snprintf(cmd, sizeof(cmd), "getvar:partition-type:%s", partition);
- status = fb_command_response(usb, cmd, response);
+ status = fb_getvar(usb, response, "partition-type:%s", partition);
if (status) {
if (skip_if_not_supported) {
fprintf(stderr,
@@ -312,9 +324,7 @@
return -1;
}
- response[FB_RESPONSE_SZ] = '\0';
- snprintf(cmd, sizeof(cmd), "getvar:partition-size:%s", partition);
- status = fb_command_response(usb, cmd, response);
+ status = fb_getvar(usb, response, "partition-size:%s", partition);
if (status) {
if (skip_if_not_supported) {
fprintf(stderr,
diff --git a/fastboot/fastboot.h b/fastboot/fastboot.h
index 1d3e2b8..a84b0be 100644
--- a/fastboot/fastboot.h
+++ b/fastboot/fastboot.h
@@ -41,6 +41,7 @@
#define FB_RESPONSE_SZ 64
/* engine.c - high level command queue engine */
+int fb_getvar(struct usb_handle *usb, char *response, const char *fmt, ...);
void fb_queue_flash(const char *ptn, void *data, unsigned sz);;
void fb_queue_erase(const char *ptn);
void fb_queue_format(const char *ptn, int skip_if_not_supported);