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Add more image commands

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topjohnwu
2017-06-24 23:37:45 +09:00
parent 9430ed66cd
commit 04538372c6
6 changed files with 155 additions and 113 deletions
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38
jni/daemon/bootstages.c
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@@ -54,44 +54,6 @@ struct node_entry {
* Image handling *
******************/
static char *loopsetup(const char *img) {
char device[20];
struct loop_info64 info;
int i, lfd, ffd;
memset(&info, 0, sizeof(info));
// First get an empty loop device
for (i = 0; i <= 7; ++i) {
sprintf(device, "/dev/block/loop%d", i);
lfd = xopen(device, O_RDWR);
if (ioctl(lfd, LOOP_GET_STATUS64, &info) == -1)
break;
close(lfd);
}
if (i == 8) return NULL;
ffd = xopen(img, O_RDWR);
if (ioctl(lfd, LOOP_SET_FD, ffd) == -1)
return NULL;
strcpy((char *) info.lo_file_name, img);
ioctl(lfd, LOOP_SET_STATUS64, &info);
close(lfd);
close(ffd);
return strdup(device);
}
static char *mount_image(const char *img, const char *target) {
char *device = loopsetup(img);
if (device)
xmount(device, target, "ext4", 0, NULL);
return device;
}
static void umount_image(const char *target, const char *device) {
xumount(target);
int fd = xopen(device, O_RDWR);
ioctl(fd, LOOP_CLR_FD);
close(fd);
}
#define round_size(a) ((((a) / 32) + 2) * 32)
#define SOURCE_TMP "/dev/source"
#define TARGET_TMP "/dev/target"