MarcoBuster/Magisk
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Fix bootloops on some devices

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This commit is contained in:
topjohnwu 2017-11-23 18:38:12 +08:00
parent 968bd8be67
commit bc592c1d13
1 changed files with 18 additions and 17 deletions
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35
jni/core/magiskinit.c
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@ -63,18 +63,19 @@ struct device {
extern policydb_t *policydb;
static void parse_cmdline(struct cmdline *cmd) {
// cleanup
cmd->skip_initramfs = 0;
cmd->slot[0] = '\0';
char *tok;
char buffer[4096];
char cmdline[4096];
mkdir("/proc", 0555);
mount("proc", "/proc", "proc", 0, NULL);
int fd = open("/proc/cmdline", O_RDONLY | O_CLOEXEC);
ssize_t size = read(fd, buffer, sizeof(buffer));
buffer[size] = '\0';
cmdline[read(fd, cmdline, sizeof(cmdline))] = '\0';
close(fd);
umount("/proc");
tok = strtok(buffer, " ");
cmd->skip_initramfs = 0;
cmd->slot[0] = '\0';
tok = strtok(cmdline, " ");
while (tok != NULL) {
if (strncmp(tok, "androidboot.slot_suffix", 23) == 0) {
sscanf(tok, "androidboot.slot_suffix=%s", cmd->slot);
@ -340,14 +341,14 @@ static int dump_magiskrc(const char *path, mode_t mode) {
}
int main(int argc, char *argv[]) {
umask(0);
if (strcmp(basename(argv[0]), "magiskpolicy") == 0 || strcmp(basename(argv[0]), "supolicy") == 0)
return magiskpolicy_main(argc, argv);
if (argc > 1 && (strcmp(argv[1], "magiskpolicy") == 0 || strcmp(argv[1], "supolicy") == 0))
return magiskpolicy_main(argc - 1, argv + 1);
umask(0);
if (argc > 1) {
if (argc > 1 && strcmp(argv[1], "-x") == 0) {
if (strcmp(argv[2], "magisk") == 0)
return dump_magisk(argv[3], 0755);
else if (strcmp(argv[2], "magiskrc") == 0)
@ -412,14 +413,15 @@ int main(int argc, char *argv[]) {
int overlay = open("/overlay", O_RDONLY | O_CLOEXEC);
mv_dir(overlay, root);
// Clean up
rmdir("/overlay");
close(overlay);
close(root);
patch_ramdisk();
patch_sepolicy();
// Clean up
rmdir("/overlay");
umount("/vendor");
close(overlay);
close(root);
if (fork() == 0) {
// Fork a new process for full patch
@ -431,10 +433,9 @@ int main(int argc, char *argv[]) {
dump_policydb(SELINUX_LOAD);
close(open(PATCHDONE, O_RDONLY | O_CREAT, 0));
destroy_policydb();
} else {
// Finally, give control back!
execv("/init", argv);
return 0;
}
return 0;
// Finally, give control back!
execv("/init", argv);
}