init

wrapper.c

@@ -0,0 +1,62 @@
+#define _GNU_SOURCE
+#include <errno.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+pid_t child_proc = -1;
+
+static void intHan(int signum) {
+    if (child_proc != -1) {
+        kill(child_proc, SIGKILL);
+    }
+}
+
+int main(int argc, char *argv[], char *envp[]) {
+    if (signal(SIGINT, intHan) == SIG_ERR) {
+        perror("signal");
+        return 1;
+    }
+
+    if (argc > 2) {
+        system("rm -r ./rootfs/data/data/com.apple.android.music/files/");
+    }
+
+    if (chdir("./rootfs") != 0) {
+        perror("chdir");
+        return 1;
+    }
+    if (chroot("./") != 0) {
+        perror("chroot");
+        return 1;
+    }
+    mknod("/dev/urandom", S_IFCHR | 0666, makedev(0x1, 0x9));
+    chmod("/system/bin/linker64", 0755);
+    chmod("/system/bin/main", 0755);
+
+    if (unshare(CLONE_NEWPID)) {
+        perror("unshare");
+        return 1;
+    }
+    child_proc = fork();
+    if (child_proc == -1) {
+        perror("fork");
+        return 1;
+    }
+    if (child_proc > 0) {
+        close(STDOUT_FILENO);
+        wait(NULL);
+        return 0;
+    }
+
+    mkdir("/data/data/com.apple.android.music/files", 0777);
+    mkdir("/data/data/com.apple.android.music/files/mpl_db", 0777);
+    execve("/system/bin/main", argv, envp);
+    perror("execve");
+    return 1;
+}