diff --git a/adb/adb.cpp b/adb/adb.cpp
index 89a20f0..29d6e65 100644
--- a/adb/adb.cpp
+++ b/adb/adb.cpp
@@ -94,6 +94,18 @@
     abort();
 }
 
+uint32_t calculate_apacket_checksum(const apacket* p) {
+    const unsigned char* x = reinterpret_cast<const unsigned char*>(p->data);
+    uint32_t sum = 0;
+    size_t count = p->msg.data_length;
+
+    while (count-- > 0) {
+        sum += *x++;
+    }
+
+    return sum;
+}
+
 apacket* get_apacket(void)
 {
     apacket* p = reinterpret_cast<apacket*>(malloc(sizeof(apacket)));
diff --git a/adb/adb.h b/adb/adb.h
index 4db5589..faeab8d 100644
--- a/adb/adb.h
+++ b/adb/adb.h
@@ -18,6 +18,7 @@
 #define __ADB_H
 
 #include <limits.h>
+#include <stdint.h>
 #include <sys/types.h>
 
 #include <string>
@@ -56,25 +57,27 @@
 struct usb_handle;
 
 struct amessage {
-    unsigned command;       /* command identifier constant      */
-    unsigned arg0;          /* first argument                   */
-    unsigned arg1;          /* second argument                  */
-    unsigned data_length;   /* length of payload (0 is allowed) */
-    unsigned data_check;    /* checksum of data payload         */
-    unsigned magic;         /* command ^ 0xffffffff             */
+    uint32_t command;     /* command identifier constant      */
+    uint32_t arg0;        /* first argument                   */
+    uint32_t arg1;        /* second argument                  */
+    uint32_t data_length; /* length of payload (0 is allowed) */
+    uint32_t data_check;  /* checksum of data payload         */
+    uint32_t magic;       /* command ^ 0xffffffff             */
 };
 
 struct apacket
 {
     apacket *next;
 
-    unsigned len;
-    unsigned char *ptr;
+    size_t len;
+    char* ptr;
 
     amessage msg;
-    unsigned char data[MAX_PAYLOAD];
+    char data[MAX_PAYLOAD];
 };
 
+uint32_t calculate_apacket_checksum(const apacket* packet);
+
 /* the adisconnect structure is used to record a callback that
 ** will be called whenever a transport is disconnected (e.g. by the user)
 ** this should be used to cleanup objects that depend on the
diff --git a/adb/adb_auth.h b/adb/adb_auth.h
index 4db83a4..a6f224f 100644
--- a/adb/adb_auth.h
+++ b/adb/adb_auth.h
@@ -36,11 +36,10 @@
 void adb_auth_init();
 
 int adb_auth_keygen(const char* filename);
-int adb_auth_sign(RSA* key, const unsigned char* token, size_t token_size, unsigned char* sig);
 std::string adb_auth_get_userkey();
 std::deque<std::shared_ptr<RSA>> adb_auth_get_private_keys();
 
-void send_auth_response(uint8_t *token, size_t token_size, atransport *t);
+void send_auth_response(const char* token, size_t token_size, atransport* t);
 
 #else // !ADB_HOST
 
@@ -50,8 +49,8 @@
 void adbd_auth_verified(atransport *t);
 
 void adbd_cloexec_auth_socket();
-bool adbd_auth_verify(uint8_t* token, size_t token_size, uint8_t* sig, int sig_len);
-void adbd_auth_confirm_key(unsigned char *data, size_t len, atransport *t);
+bool adbd_auth_verify(const char* token, size_t token_size, const char* sig, int sig_len);
+void adbd_auth_confirm_key(const char* data, size_t len, atransport* t);
 
 void send_auth_request(atransport *t);
 
diff --git a/adb/adb_auth_host.cpp b/adb/adb_auth_host.cpp
index b5b9b97..ff2d76d 100644
--- a/adb/adb_auth_host.cpp
+++ b/adb/adb_auth_host.cpp
@@ -298,14 +298,15 @@
     return result;
 }
 
-int adb_auth_sign(RSA* key, const unsigned char* token, size_t token_size, unsigned char* sig) {
+static int adb_auth_sign(RSA* key, const char* token, size_t token_size, char* sig) {
     if (token_size != TOKEN_SIZE) {
         D("Unexpected token size %zd", token_size);
         return 0;
     }
 
     unsigned int len;
-    if (!RSA_sign(NID_sha1, token, token_size, sig, &len, key)) {
+    if (!RSA_sign(NID_sha1, reinterpret_cast<const uint8_t*>(token), token_size,
+                  reinterpret_cast<uint8_t*>(sig), &len, key)) {
         return 0;
     }
 
@@ -448,7 +449,7 @@
     send_packet(p, t);
 }
 
-void send_auth_response(uint8_t* token, size_t token_size, atransport* t) {
+void send_auth_response(const char* token, size_t token_size, atransport* t) {
     std::shared_ptr<RSA> key = t->NextKey();
     if (key == nullptr) {
         // No more private keys to try, send the public key.
diff --git a/adb/adbd_auth.cpp b/adb/adbd_auth.cpp
index fa76c8d..b5f87be 100644
--- a/adb/adbd_auth.cpp
+++ b/adb/adbd_auth.cpp
@@ -46,7 +46,7 @@
 
 bool auth_required = true;
 
-bool adbd_auth_verify(uint8_t* token, size_t token_size, uint8_t* sig, int sig_len) {
+bool adbd_auth_verify(const char* token, size_t token_size, const char* sig, int sig_len) {
     static constexpr const char* key_paths[] = { "/adb_keys", "/data/misc/adb/adb_keys", nullptr };
 
     for (const auto& path : key_paths) {
@@ -78,7 +78,9 @@
                     continue;
                 }
 
-                bool verified = (RSA_verify(NID_sha1, token, token_size, sig, sig_len, key) == 1);
+                bool verified =
+                    (RSA_verify(NID_sha1, reinterpret_cast<const uint8_t*>(token), token_size,
+                                reinterpret_cast<const uint8_t*>(sig), sig_len, key) == 1);
                 RSA_free(key);
                 if (verified) return true;
             }
@@ -121,7 +123,7 @@
     }
 }
 
-void adbd_auth_confirm_key(unsigned char* key, size_t len, atransport* t) {
+void adbd_auth_confirm_key(const char* key, size_t len, atransport* t) {
     if (!usb_transport) {
         usb_transport = t;
         t->AddDisconnect(&usb_disconnect);
diff --git a/adb/sockets.cpp b/adb/sockets.cpp
index b809c4f..fff6049 100644
--- a/adb/sockets.cpp
+++ b/adb/sockets.cpp
@@ -122,7 +122,7 @@
 }
 
 static int local_socket_enqueue(asocket* s, apacket* p) {
-    D("LS(%d): enqueue %d", s->id, p->len);
+    D("LS(%d): enqueue %zu", s->id, p->len);
 
     p->ptr = p->data;
 
@@ -195,7 +195,7 @@
 
     /* dispose of any unwritten data */
     for (p = s->pkt_first; p; p = n) {
-        D("LS(%d): discarding %d bytes", s->id, p->len);
+        D("LS(%d): discarding %zu bytes", s->id, p->len);
         n = p->next;
         put_apacket(p);
     }
@@ -305,7 +305,7 @@
 
     if (ev & FDE_READ) {
         apacket* p = get_apacket();
-        unsigned char* x = p->data;
+        char* x = p->data;
         const size_t max_payload = s->get_max_payload();
         size_t avail = max_payload;
         int r = 0;
@@ -553,7 +553,7 @@
     s->close(s);
 }
 
-static unsigned unhex(unsigned char* s, int len) {
+static unsigned unhex(char* s, int len) {
     unsigned n = 0, c;
 
     while (len-- > 0) {
@@ -665,7 +665,7 @@
     TransportType type = kTransportAny;
 #endif
 
-    D("SS(%d): enqueue %d", s->id, p->len);
+    D("SS(%d): enqueue %zu", s->id, p->len);
 
     if (s->pkt_first == 0) {
         s->pkt_first = p;
@@ -698,7 +698,7 @@
     D("SS(%d): len is %d", s->id, len);
     /* can't do anything until we have the full header */
     if ((len + 4) > p->len) {
-        D("SS(%d): waiting for %d more bytes", s->id, len + 4 - p->len);
+        D("SS(%d): waiting for %zu more bytes", s->id, len + 4 - p->len);
         return 0;
     }
 
diff --git a/adb/transport.cpp b/adb/transport.cpp
index 9880902..7b4bb1c 100644
--- a/adb/transport.cpp
+++ b/adb/transport.cpp
@@ -150,32 +150,17 @@
     }
 }
 
-void send_packet(apacket *p, atransport *t)
-{
-    unsigned char *x;
-    unsigned sum;
-    unsigned count;
-
+void send_packet(apacket* p, atransport* t) {
     p->msg.magic = p->msg.command ^ 0xffffffff;
-
-    count = p->msg.data_length;
-    x = (unsigned char *) p->data;
-    sum = 0;
-    while(count-- > 0){
-        sum += *x++;
-    }
-    p->msg.data_check = sum;
+    p->msg.data_check = calculate_apacket_checksum(p);
 
     print_packet("send", p);
 
     if (t == NULL) {
-        D("Transport is null");
-        // Zap errno because print_packet() and other stuff have errno effect.
-        errno = 0;
-        fatal_errno("Transport is null");
+        fatal("Transport is null");
     }
 
-    if(write_packet(t->transport_socket, t->serial, &p)){
+    if (write_packet(t->transport_socket, t->serial, &p)) {
         fatal_errno("cannot enqueue packet on transport socket");
     }
 }
@@ -1052,23 +1037,11 @@
     return 0;
 }
 
-int check_data(apacket *p)
-{
-    unsigned count, sum;
-    unsigned char *x;
-
-    count = p->msg.data_length;
-    x = p->data;
-    sum = 0;
-    while(count-- > 0) {
-        sum += *x++;
-    }
-
-    if(sum != p->msg.data_check) {
+int check_data(apacket* p) {
+    if (calculate_apacket_checksum(p) != p->msg.data_check) {
         return -1;
-    } else {
-        return 0;
     }
+    return 0;
 }
 
 #if ADB_HOST
diff --git a/adb/transport.h b/adb/transport.h
index aaa8be4..621516c 100644
--- a/adb/transport.h
+++ b/adb/transport.h
@@ -112,7 +112,7 @@
     std::shared_ptr<RSA> NextKey();
 #endif
 
-    unsigned char token[TOKEN_SIZE] = {};
+    char token[TOKEN_SIZE] = {};
     size_t failed_auth_attempts = 0;
 
     const std::string connection_state_name() const;
diff --git a/base/include/android-base/parseint.h b/base/include/android-base/parseint.h
index ed75e2d..7415409 100644
--- a/base/include/android-base/parseint.h
+++ b/base/include/android-base/parseint.h
@@ -31,7 +31,7 @@
 template <typename T>
 bool ParseUint(const char* s, T* out,
                T max = std::numeric_limits<T>::max()) {
-  int base = (s[0] == '0' && s[1] == 'x') ? 16 : 10;
+  int base = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X')) ? 16 : 10;
   errno = 0;
   char* end;
   unsigned long long int result = strtoull(s, &end, base);
@@ -53,7 +53,7 @@
 bool ParseInt(const char* s, T* out,
               T min = std::numeric_limits<T>::min(),
               T max = std::numeric_limits<T>::max()) {
-  int base = (s[0] == '0' && s[1] == 'x') ? 16 : 10;
+  int base = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X')) ? 16 : 10;
   errno = 0;
   char* end;
   long long int result = strtoll(s, &end, base);
diff --git a/cpio/mkbootfs.c b/cpio/mkbootfs.c
index 0e35323..b89c395 100644
--- a/cpio/mkbootfs.c
+++ b/cpio/mkbootfs.c
@@ -51,6 +51,8 @@
 #define CANNED_LINE_LENGTH  (1024)
 #endif
 
+#define TRAILER "TRAILER!!!"
+
 static int verbose = 0;
 static int total_size = 0;
 
@@ -80,8 +82,8 @@
     } else {
         // Use the compiled-in fs_config() function.
         unsigned st_mode = s->st_mode;
-        fs_config(path, S_ISDIR(s->st_mode), target_out_path,
-                       &s->st_uid, &s->st_gid, &st_mode, &capabilities);
+        int is_dir = S_ISDIR(s->st_mode) || strcmp(path, TRAILER) == 0;
+        fs_config(path, is_dir, target_out_path, &s->st_uid, &s->st_gid, &st_mode, &capabilities);
         s->st_mode = (typeof(s->st_mode)) st_mode;
     }
 }
@@ -140,7 +142,7 @@
 {
     struct stat s;
     memset(&s, 0, sizeof(s));
-    _eject(&s, "TRAILER!!!", 10, 0, 0);
+    _eject(&s, TRAILER, 10, 0, 0);
 
     while(total_size & 0xff) {
         total_size++;
diff --git a/include/cutils/native_handle.h b/include/cutils/native_handle.h
index 31695cb..813dadc 100644
--- a/include/cutils/native_handle.h
+++ b/include/cutils/native_handle.h
@@ -57,6 +57,15 @@
 native_handle_t* native_handle_create(int numFds, int numInts);
 
 /*
+ * native_handle_clone
+ *
+ * creates a native_handle_t and initializes it from another native_handle_t.
+ * Must be destroyed with native_handle_delete().
+ *
+ */
+native_handle_t* native_handle_clone(const native_handle_t* handle);
+
+/*
  * native_handle_delete
  * 
  * frees a native_handle_t allocated with native_handle_create().
diff --git a/libcutils/native_handle.c b/libcutils/native_handle.c
index 7f3479d..cae146d 100644
--- a/libcutils/native_handle.c
+++ b/libcutils/native_handle.c
@@ -44,6 +44,27 @@
     return h;
 }
 
+native_handle_t* native_handle_clone(const native_handle_t* handle)
+{
+    native_handle_t* clone = native_handle_create(handle->numFds, handle->numInts);
+    int i;
+
+    for (i = 0; i < handle->numFds; i++) {
+        clone->data[i] = dup(handle->data[i]);
+        if (clone->data[i] < 0) {
+            clone->numFds = i;
+            native_handle_close(clone);
+            native_handle_delete(clone);
+            return NULL;
+        }
+    }
+
+    memcpy(&clone->data[handle->numFds], &handle->data[handle->numFds],
+            sizeof(int) * handle->numInts);
+
+    return clone;
+}
+
 int native_handle_delete(native_handle_t* h)
 {
     if (h) {
diff --git a/libsparse/output_file.c b/libsparse/output_file.c
index 6578d99..2115998 100644
--- a/libsparse/output_file.c
+++ b/libsparse/output_file.c
@@ -63,7 +63,7 @@
 	int (*open)(struct output_file *, int fd);
 	int (*skip)(struct output_file *, int64_t);
 	int (*pad)(struct output_file *, int64_t);
-	int (*write)(struct output_file *, void *, int);
+	int (*write)(struct output_file *, void *, size_t);
 	void (*close)(struct output_file *);
 };
 
@@ -149,18 +149,23 @@
 	return 0;
 }
 
-static int file_write(struct output_file *out, void *data, int len)
+static int file_write(struct output_file *out, void *data, size_t len)
 {
-	int ret;
+	ssize_t ret;
 	struct output_file_normal *outn = to_output_file_normal(out);
 
-	ret = write(outn->fd, data, len);
-	if (ret < 0) {
-		error_errno("write");
-		return -1;
-	} else if (ret < len) {
-		error("incomplete write");
-		return -1;
+	while (len > 0) {
+		ret = write(outn->fd, data, len);
+		if (ret < 0) {
+			if (errno == EINTR) {
+				continue;
+			}
+			error_errno("write");
+			return -1;
+		}
+
+		data = (char *)data + ret;
+		len -= ret;
 	}
 
 	return 0;
@@ -232,18 +237,20 @@
 	return 0;
 }
 
-static int gz_file_write(struct output_file *out, void *data, int len)
+static int gz_file_write(struct output_file *out, void *data, size_t len)
 {
 	int ret;
 	struct output_file_gz *outgz = to_output_file_gz(out);
 
-	ret = gzwrite(outgz->gz_fd, data, len);
-	if (ret < 0) {
-		error_errno("gzwrite");
-		return -1;
-	} else if (ret < len) {
-		error("incomplete gzwrite");
-		return -1;
+	while (len > 0) {
+		ret = gzwrite(outgz->gz_fd, data,
+			      min(len, (unsigned int)INT_MAX));
+		if (ret == 0) {
+			error("gzwrite %s", gzerror(outgz->gz_fd, NULL));
+			return -1;
+		}
+		len -= ret;
+		data = (char *)data + ret;
 	}
 
 	return 0;
@@ -293,7 +300,7 @@
 	return -1;
 }
 
-static int callback_file_write(struct output_file *out, void *data, int len)
+static int callback_file_write(struct output_file *out, void *data, size_t len)
 {
 	struct output_file_callback *outc = to_output_file_callback(out);
 
@@ -698,14 +705,16 @@
 	int ret;
 	int64_t aligned_offset;
 	int aligned_diff;
-	int buffer_size;
+	uint64_t buffer_size;
 	char *ptr;
 
 	aligned_offset = offset & ~(4096 - 1);
 	aligned_diff = offset - aligned_offset;
-	buffer_size = len + aligned_diff;
+	buffer_size = (uint64_t)len + (uint64_t)aligned_diff;
 
 #ifndef _WIN32
+	if (buffer_size > SIZE_MAX)
+		return -E2BIG;
 	char *data = mmap64(NULL, buffer_size, PROT_READ, MAP_SHARED, fd,
 			aligned_offset);
 	if (data == MAP_FAILED) {