Support non skip_initramfs device with slot suffix
This commit is contained in:
topjohnwu
parent
6119c24720
commit
a94fa81195
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@ -55,12 +55,11 @@
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extern policydb_t *policydb;
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int (*init_applet_main[]) (int, char *[]) = { magiskpolicy_main, magiskpolicy_main, NULL };
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static int keepverity = 0, keepencrypt = 0;
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static char RAND_SOCKET_NAME[sizeof(SOCKET_NAME)];
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static int SOCKET_OFF = -1;
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struct cmdline {
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int skip_initramfs;
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char skip_initramfs;
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char slot[3];
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};
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@ -74,8 +73,7 @@ struct device {
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static void parse_cmdline(struct cmdline *cmd) {
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// cleanup
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cmd->skip_initramfs = 0;
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cmd->slot[0] = '\0';
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memset(cmd, 0, sizeof(&cmd));
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char cmdline[4096];
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mkdir("/proc", 0555);
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@ -89,11 +87,13 @@ static void parse_cmdline(struct cmdline *cmd) {
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sscanf(tok, "androidboot.slot_suffix=%s", cmd->slot);
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} else if (strncmp(tok, "androidboot.slot", 16) == 0) {
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cmd->slot[0] = '_';
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sscanf(tok, "androidboot.slot=%s", cmd->slot + 1);
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sscanf(tok, "androidboot.slot=%c", cmd->slot + 1);
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} else if (strcmp(tok, "skip_initramfs") == 0) {
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cmd->skip_initramfs = 1;
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}
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}
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VLOG("cmdline: skip_initramfs[%d] slot[%s]\n", cmd->skip_initramfs, cmd->slot);
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}
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static void parse_device(struct device *dev, char *uevent) {
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@ -148,24 +148,7 @@ static int setup_block(struct device *dev, const char *partname) {
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return 0;
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}
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static void fstab_patch_cb(int dirfd, struct dirent *entry) {
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if (entry->d_type == DT_REG && strstr(entry->d_name, "fstab")) {
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void *buf;
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size_t _size;
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uint32_t size;
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full_read_at(dirfd, entry->d_name, &buf, &_size);
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size = (uint32_t) _size; /* Type conversion */
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if (!keepverity)
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patch_verity(&buf, &size, 1);
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if (!keepencrypt)
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patch_encryption(&buf, &size);
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int fstab = xopenat(dirfd, entry->d_name, O_WRONLY | O_CLOEXEC);
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write(fstab, buf, size);
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close(fstab);
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}
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}
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static void patch_ramdisk(int root) {
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static void patch_ramdisk() {
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void *addr;
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size_t size;
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mmap_rw("/init", &addr, &size);
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@ -183,25 +166,6 @@ static void patch_ramdisk(int root) {
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write(fd, addr, size);
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close(fd);
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free(addr);
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/* Disabled for now */
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// char *key, *value;
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// full_read("/.backup/.magisk", &addr, &size);
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// for (char *tok = strtok(addr, "\n"); tok; tok = strtok(NULL, "\n")) {
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// key = tok;
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// value = strchr(tok, '=') + 1;
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// value[-1] = '\0';
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// if (strcmp(key, "KEEPVERITY") == 0)
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// keepverity = strcmp(value, "true") == 0;
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// else if (strcmp(key, "KEEPFORCEENCRYPT") == 0)
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// keepencrypt = strcmp(value, "true") == 0;
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// }
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// excl_list = (char *[]) { "system_root", "system", "vendor", NULL };
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// in_order_walk(root, fstab_patch_cb);
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// if (!keepverity)
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// unlink("/verity_key");
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}
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static int strend(const char *s1, const char *s2) {
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@ -465,98 +429,98 @@ int main(int argc, char *argv[]) {
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dump_magiskrc("/overlay/init.magisk.rc", 0750);
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mkdir("/overlay/sbin", 0755);
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dump_magisk("/overlay/sbin/magisk", 0755);
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patch_socket_name("/overlay/sbin/magisk");
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mkdir("/overlay/root", 0755);
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link("/init", "/overlay/root/magiskinit");
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patch_socket_name("/overlay/sbin/magisk");
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struct cmdline cmd;
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parse_cmdline(&cmd);
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VLOG("cmdline: skip_initramfs=[%d] slot_suffix=[%s]\n", cmd.skip_initramfs, cmd.slot);
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/* ***********
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* Initialize
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* ***********/
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int root = open("/", O_RDONLY | O_CLOEXEC);
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if (cmd.skip_initramfs) {
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// Exclude overlay folder
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excl_list = (char *[]) { "overlay", ".backup", NULL };
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// Clear rootfs
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excl_list = (char *[]) { "overlay", ".backup", NULL };
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frm_rf(root);
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} else if (access("/ramdisk.cpio.xz", R_OK) == 0) {
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// High compression mode
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void *addr;
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size_t size;
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mmap_ro("/ramdisk.cpio.xz", &addr, &size);
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int fd = creat("/ramdisk.cpio", 0);
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unxz(addr, size, fd);
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munmap(addr, size);
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close(fd);
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struct vector v;
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vec_init(&v);
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parse_cpio(&v, "/ramdisk.cpio");
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excl_list = (char *[]) { "overlay", ".backup", NULL };
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frm_rf(root);
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chdir("/");
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cpio_extract_all(&v);
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cpio_vec_destroy(&v);
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} else {
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// Revert original init binary
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unlink("/init");
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link("/.backup/init", "/init");
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}
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/* ************
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* Early Mount
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* ************/
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// If skip_initramfs or using split policies, we need early mount
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if (cmd.skip_initramfs || access("/sepolicy", R_OK) != 0) {
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char partname[32];
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struct device dev;
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// Mount sysfs
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mkdir("/sys", 0755);
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xmount("sysfs", "/sys", "sysfs", 0, NULL);
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char partname[32];
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// Mount system
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snprintf(partname, sizeof(partname), "system%s", cmd.slot);
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struct device dev;
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setup_block(&dev, partname);
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if (cmd.skip_initramfs) {
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mkdir("/system_root", 0755);
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xmount(dev.path, "/system_root", "ext4", MS_RDONLY, NULL);
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int system_root = open("/system_root", O_RDONLY | O_CLOEXEC);
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mkdir("/system_root", 0755);
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xmount(dev.path, "/system_root", "ext4", MS_RDONLY, NULL);
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int system_root = open("/system_root", O_RDONLY | O_CLOEXEC);
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// Clone rootfs except /system
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excl_list = (char *[]) { "system", NULL };
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clone_dir(system_root, root);
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close(system_root);
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// Exclude system folder
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excl_list = (char *[]) { "system", NULL };
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clone_dir(system_root, root);
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mkdir("/system", 0755);
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xmount("/system_root/system", "/system", NULL, MS_BIND, NULL);
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mkdir("/system", 0755);
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xmount("/system_root/system", "/system", NULL, MS_BIND, NULL);
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} else {
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xmount(dev.path, "/system", "ext4", MS_RDONLY, NULL);
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}
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// Mount vendor
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snprintf(partname, sizeof(partname), "vendor%s", cmd.slot);
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// We need to mount independent vendor partition
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if (setup_block(&dev, partname) == 0)
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xmount(dev.path, "/vendor", "ext4", MS_RDONLY, NULL);
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close(system_root);
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} else {
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if (access("/ramdisk.cpio.xz", R_OK) == 0) {
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// High compression mode
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void *addr;
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size_t size;
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mmap_ro("/ramdisk.cpio.xz", &addr, &size);
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int fd = creat("/ramdisk.cpio", 0);
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unxz(addr, size, fd);
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munmap(addr, size);
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close(fd);
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struct vector v;
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vec_init(&v);
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parse_cpio(&v, "/ramdisk.cpio");
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excl_list = (char *[]) { "overlay", ".backup", NULL };
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frm_rf(root);
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chdir("/");
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cpio_extract_all(&v);
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cpio_vec_destroy(&v);
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} else {
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// Revert original init binary
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unlink("/init");
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link("/.backup/init", "/init");
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}
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}
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/* *************
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* Patch rootfs
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* *************/
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// Only patch rootfs if not intended to run in recovery
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if (access("/etc/recovery.fstab", F_OK) != 0) {
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int overlay = open("/overlay", O_RDONLY | O_CLOEXEC);
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mv_dir(overlay, root);
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patch_ramdisk(root);
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if (patch_sepolicy()) {
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/* Non skip_initramfs devices using separate sepolicy
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* Mount /system and try to load again */
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xmount("sysfs", "/sys", "sysfs", 0, NULL);
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struct device dev;
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setup_block(&dev, "system");
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xmount(dev.path, "/system", "ext4", MS_RDONLY, NULL);
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// We need to mount independent vendor partition
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if (setup_block(&dev, "vendor") == 0)
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xmount(dev.path, "/vendor", "ext4", MS_RDONLY, NULL);
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patch_sepolicy();
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umount("/system");
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}
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close(overlay);
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rmdir("/overlay");
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patch_ramdisk();
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patch_sepolicy();
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close(STDIN_FILENO);
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close(STDOUT_FILENO);
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close(STDERR_FILENO);
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@ -570,8 +534,9 @@ int main(int argc, char *argv[]) {
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// Clean up
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close(root);
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if (!cmd.skip_initramfs)
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umount("/system");
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umount("/vendor");
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rmdir("/overlay");
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// Finally, give control back!
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execv("/init", argv);
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@ -103,4 +103,4 @@ rm -rf /cache/*magisk* /cache/unblock /data/*magisk* /data/cache/*magisk* /data
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/data/user*/*/magisk.db /data/user*/*/com.topjohnwu.magisk /data/user*/*/.tmp.magisk.config \
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/data/adb/*magisk* 2>/dev/null
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$BOOTMODE && reboot
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$BOOTMODE && /system/bin/reboot
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