disk: Added function disk_dump_raw for dumping raw block device

src/disk.c

@@ -16,11 +16,24 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <fcntl.h>
+#include <libgen.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/statvfs.h>
+
+#include <linux/fs.h>
+
 #include "disk.h"
 #include "global.h"
 #include "image.h"
 #include "device.h"
 #include "usb-device.h"
+#include "printf-utils.h"
+
+static char global_buf[1 << 22]; /* 4MB */
 
 int disk_init(struct usb_device_info * dev) {
 
@@ -38,6 +51,15 @@ enum device disk_get_device(struct usb_device_info * dev) {
 
 }
 
+int disk_flash_raw(const char * blkdev, const char * file) {
+
+	ERROR("Not implemented yet");
+	(void)blkdev;
+	(void)file;
+	return -1;
+
+}
+
 int disk_flash_image(struct usb_device_info * dev, struct image * image) {
 
 	ERROR("Not implemented yet");
@@ -47,6 +69,105 @@ int disk_flash_image(struct usb_device_info * dev, struct image * image) {
 
 }
 
+int disk_dump_raw(const char * blkdev, const char * file) {
+
+	int fd1, fd2;
+	int ret;
+	char * path;
+	uint64_t blksize;
+	size_t need, readed;
+	ssize_t size;
+	struct stat st;
+	struct statvfs buf;
+
+	printf("Dump block device %s to file %s...\n", blkdev, file);
+
+	if ( stat(blkdev, &st) != 0 ) {
+		ERROR_INFO("Cannot stat block device %s", blkdev);
+		return -1;
+	}
+
+	if ( ! S_ISBLK(st.st_mode) ) {
+		ERROR("Invalid block device %s", blkdev);
+		return -1;
+	}
+
+	fd1 = open(blkdev, O_RDONLY);
+
+	if ( fd1 < 0 ) {
+		ERROR_INFO("Cannot open block device %s", blkdev);
+		return -1;
+	}
+
+	if ( ioctl(fd1, BLKGETSIZE64, &blksize) != 0 ) {
+		ERROR_INFO("Cannot get size of block device %s", blkdev);
+		close(fd1);
+		return -1;
+	}
+
+	if ( blksize > ULLONG_MAX ) {
+		ERROR("Block device %s is too big", blkdev);
+		close(fd1);
+		return -1;
+	}
+
+	if ( blksize == 0 ) {
+		ERROR("Block device %s has zero size", blkdev);
+		close(fd1);
+		return -1;
+	}
+
+	path = strdup(file);
+	if ( ! path ) {
+		ALLOC_ERROR();
+		close(fd1);
+		return -1;
+	}
+
+	ret = statvfs(dirname(path), &buf);
+
+	free(path);
+
+	if ( ret == 0 && buf.f_bsize * buf.f_bfree < blksize ) {
+		ERROR("Not enought free space (have: %llu, need: %llu)", (unsigned long long int)(buf.f_bsize) * buf.f_bfree, (unsigned long long int)blksize);
+		close(fd1);
+		return -1;
+	}
+
+	fd2 = creat(file, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+
+	if ( fd2 < 0 ) {
+		ERROR_INFO("Cannot create file %s", file);
+		close(fd1);
+		return -1;
+	}
+
+	readed = 0;
+	printf_progressbar(0, blksize);
+
+	while ( readed < blksize ) {
+		need = blksize - readed;
+		if ( need > sizeof(global_buf) )
+			need = sizeof(global_buf);
+		size = read(fd1, global_buf, need);
+		if ( size == 0 )
+			break;
+		if ( write(fd2, global_buf, size) != size ) {
+			PRINTF_ERROR("Dumping image failed");
+			close(fd1);
+			close(fd2);
+			return -1;
+		}
+		readed += size;
+		printf_progressbar(readed, blksize);
+	}
+
+	close(fd1);
+	close(fd2);
+	return 0;
+
+}
+
 int disk_dump_image(struct usb_device_info * dev, enum image_type image, const char * file) {
 
 	ERROR("Not implemented yet");

src/disk.h

@@ -27,6 +27,9 @@ int disk_init(struct usb_device_info * dev);
 
 enum device disk_get_device(struct usb_device_info * dev);
 
+int disk_flash_raw(const char * blkdev, const char * file);
+int disk_dump_raw(const char * blkdev, const char * file);
+
 int disk_flash_image(struct usb_device_info * dev, struct image * image);
 int disk_dump_image(struct usb_device_info * dev, enum image_type image, const char * file);
 int disk_check_badblocks(struct usb_device_info * dev, const char * device);