TheArchive/Magisk
1
0
Fork 0
mirror of https://github.com/topjohnwu/Magisk.git synced 2025-12-06 14:52:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add ext4 img helper commands

Browse Source
This commit is contained in:
topjohnwu
2017-06-03 03:58:26 +08:00
parent 20903784a4
commit b9eab39541
4 changed files with 91 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

50
jni/utils/misc.c
View File

@@ -397,3 +397,53 @@ void get_client_cred(int fd, struct ucred *cred) {
if(getsockopt(fd, SOL_SOCKET, SO_PEERCRED, cred, &ucred_length))
PLOGE("getsockopt");
}
int create_img(const char *img, int size) {
unlink(img);
LOGI("Create %s with size %dM\n", img, size);
// Create a temp file with the file contexts
char file_contexts[] = "/magisk(/.*)? u:object_r:system_file:s0\n";
int fd = xopen("/dev/file_contexts_image", O_WRONLY | O_CREAT | O_TRUNC, 0644);
xwrite(fd, file_contexts, sizeof(file_contexts));
close(fd);
char command[PATH_MAX];
snprintf(command, sizeof(command),
"make_ext4fs -l %dM -a /magisk -S /dev/file_contexts_image %s", size, img);
int ret = system(command);
unlink("/dev/file_contexts_image");
return ret;
}
int get_img_size(const char *img, int *used, int *total) {
if (access(img, R_OK) == -1)
return 1;
char buffer[PATH_MAX];
snprintf(buffer, sizeof(buffer), "e2fsck -n %s 2>/dev/null | tail -n 1", img);
char *const command[] = { "sh", "-c", buffer, NULL };
int pid, fd;
pid = run_command(&fd, "/system/bin/sh", command);
fdgets(buffer, sizeof(buffer), fd);
close(fd);
if (pid == -1)
return 1;
waitpid(pid, NULL, 0);
char *tok;
tok = strtok(buffer, ",");
while(tok != NULL) {
if (strstr(tok, "blocks"))
break;
tok = strtok(NULL, ",");
}
sscanf(tok, "%d/%d", used, total);
*used = *used / 256 + 1;
*total /= 256;
return 0;
}
int resize_img(const char *img, int size) {
LOGI("Resize %s to %dM\n", img, size);
char buffer[PATH_MAX];
snprintf(buffer, PATH_MAX, "e2fsck -yf %s; resize2fs %s %dM;", img, img, size);
return system(buffer);
}

3
jni/utils/utils.h
View File

@@ -91,5 +91,8 @@ int clone_dir(const char *source, const char *target);
int rm_rf(const char *target);
void clone_attr(const char *source, const char *target);
void get_client_cred(int fd, struct ucred *cred);
int create_img(const char *img, int size);
int get_img_size(const char *img, int *used, int *total);
int resize_img(const char *img, int size);
#endif