diff --git a/adb/adb.h b/adb/adb.h
index d79cd2d4c..920999705 100644
--- a/adb/adb.h
+++ b/adb/adb.h
@@ -139,7 +139,7 @@ atransport* find_emulator_transport_by_adb_port(int adb_port);
 atransport* find_emulator_transport_by_console_port(int console_port);
 #endif
 
-int service_to_fd(std::string_view name, atransport* transport);
+unique_fd service_to_fd(std::string_view name, atransport* transport);
 #if !ADB_HOST
 unique_fd daemon_service_to_fd(std::string_view name, atransport* transport);
 #endif
diff --git a/adb/adb_listeners.cpp b/adb/adb_listeners.cpp
index be457a683..29909a555 100644
--- a/adb/adb_listeners.cpp
+++ b/adb/adb_listeners.cpp
@@ -75,41 +75,36 @@ static ListenerList& listener_list GUARDED_BY(listener_list_mutex) = *new Listen
 
 static void ss_listener_event_func(int _fd, unsigned ev, void *_l) {
     if (ev & FDE_READ) {
-        int fd = adb_socket_accept(_fd, nullptr, nullptr);
+        unique_fd fd(adb_socket_accept(_fd, nullptr, nullptr));
         if (fd < 0) return;
 
         int rcv_buf_size = CHUNK_SIZE;
-        adb_setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &rcv_buf_size, sizeof(rcv_buf_size));
+        adb_setsockopt(fd.get(), SOL_SOCKET, SO_RCVBUF, &rcv_buf_size, sizeof(rcv_buf_size));
 
-        asocket* s = create_local_socket(fd);
+        asocket* s = create_local_socket(std::move(fd));
         if (s) {
             connect_to_smartsocket(s);
             return;
         }
-
-        adb_close(fd);
     }
 }
 
 static void listener_event_func(int _fd, unsigned ev, void* _l)
 {
     alistener* listener = reinterpret_cast<alistener*>(_l);
-    asocket *s;
 
     if (ev & FDE_READ) {
-        int fd = adb_socket_accept(_fd, nullptr, nullptr);
+        unique_fd fd(adb_socket_accept(_fd, nullptr, nullptr));
         if (fd < 0) {
             return;
         }
 
-        s = create_local_socket(fd);
+        asocket* s = create_local_socket(std::move(fd));
         if (s) {
             s->transport = listener->transport;
             connect_to_remote(s, listener->connect_to);
             return;
         }
-
-        adb_close(fd);
     }
 }
 
diff --git a/adb/adb_utils.h b/adb/adb_utils.h
index 8253487a8..a85ca8c84 100644
--- a/adb/adb_utils.h
+++ b/adb/adb_utils.h
@@ -53,8 +53,6 @@ std::string perror_str(const char* msg);
 
 bool set_file_block_mode(int fd, bool block);
 
-int adb_close(int fd);
-
 // Given forward/reverse targets, returns true if they look sane. If an error is found, fills
 // |error| and returns false.
 // Currently this only checks "tcp:" targets. Additional checking could be added for other targets
diff --git a/adb/adb_utils_test.cpp b/adb/adb_utils_test.cpp
index bb094258c..8518e1782 100644
--- a/adb/adb_utils_test.cpp
+++ b/adb/adb_utils_test.cpp
@@ -147,17 +147,16 @@ TEST(adb_utils, mkdirs) {
 
 #if !defined(_WIN32)
 TEST(adb_utils, set_file_block_mode) {
-  int fd = adb_open("/dev/null", O_RDWR | O_APPEND);
-  ASSERT_GE(fd, 0);
-  int flags = fcntl(fd, F_GETFL, 0);
-  ASSERT_EQ(O_RDWR | O_APPEND, (flags & (O_RDWR | O_APPEND)));
-  ASSERT_TRUE(set_file_block_mode(fd, false));
-  int new_flags = fcntl(fd, F_GETFL, 0);
-  ASSERT_EQ(flags | O_NONBLOCK, new_flags);
-  ASSERT_TRUE(set_file_block_mode(fd, true));
-  new_flags = fcntl(fd, F_GETFL, 0);
-  ASSERT_EQ(flags, new_flags);
-  ASSERT_EQ(0, adb_close(fd));
+    unique_fd fd(adb_open("/dev/null", O_RDWR | O_APPEND));
+    ASSERT_GE(fd, 0);
+    int flags = fcntl(fd, F_GETFL, 0);
+    ASSERT_EQ(O_RDWR | O_APPEND, (flags & (O_RDWR | O_APPEND)));
+    ASSERT_TRUE(set_file_block_mode(fd, false));
+    int new_flags = fcntl(fd, F_GETFL, 0);
+    ASSERT_EQ(flags | O_NONBLOCK, new_flags);
+    ASSERT_TRUE(set_file_block_mode(fd, true));
+    new_flags = fcntl(fd, F_GETFL, 0);
+    ASSERT_EQ(flags, new_flags);
 }
 #endif
 
diff --git a/adb/client/adb_client.cpp b/adb/client/adb_client.cpp
index 9a25d104c..0a09d1ee5 100644
--- a/adb/client/adb_client.cpp
+++ b/adb/client/adb_client.cpp
@@ -100,13 +100,11 @@ static int switch_socket_transport(int fd, std::string* error) {
 
     if (!SendProtocolString(fd, service)) {
         *error = perror_str("write failure during connection");
-        adb_close(fd);
         return -1;
     }
     D("Switch transport in progress");
 
     if (!adb_status(fd, error)) {
-        adb_close(fd);
         D("Switch transport failed: %s", error->c_str());
         return -1;
     }
@@ -194,7 +192,7 @@ bool adb_kill_server() {
 
 int adb_connect(const std::string& service, std::string* error) {
     // first query the adb server's version
-    int fd = _adb_connect("host:version", error);
+    unique_fd fd(_adb_connect("host:version", error));
 
     D("adb_connect: service %s", service.c_str());
     if (fd == -2 && !is_local_socket_spec(__adb_server_socket_spec)) {
@@ -224,12 +222,10 @@ int adb_connect(const std::string& service, std::string* error) {
         if (fd >= 0) {
             std::string version_string;
             if (!ReadProtocolString(fd, &version_string, error)) {
-                adb_close(fd);
                 return -1;
             }
 
             ReadOrderlyShutdown(fd);
-            adb_close(fd);
 
             if (sscanf(&version_string[0], "%04x", &version) != 1) {
                 *error = android::base::StringPrintf("cannot parse version string: %s",
@@ -258,52 +254,48 @@ int adb_connect(const std::string& service, std::string* error) {
         return 0;
     }
 
-    fd = _adb_connect(service, error);
+    fd.reset(_adb_connect(service, error));
     if (fd == -1) {
         D("_adb_connect error: %s", error->c_str());
     } else if(fd == -2) {
         fprintf(stderr, "* daemon still not running\n");
     }
-    D("adb_connect: return fd %d", fd);
+    D("adb_connect: return fd %d", fd.get());
 
-    return fd;
+    return fd.release();
 }
 
 
 bool adb_command(const std::string& service) {
     std::string error;
-    int fd = adb_connect(service, &error);
+    unique_fd fd(adb_connect(service, &error));
     if (fd < 0) {
         fprintf(stderr, "error: %s\n", error.c_str());
         return false;
     }
 
-    if (!adb_status(fd, &error)) {
+    if (!adb_status(fd.get(), &error)) {
         fprintf(stderr, "error: %s\n", error.c_str());
-        adb_close(fd);
         return false;
     }
 
-    ReadOrderlyShutdown(fd);
-    adb_close(fd);
+    ReadOrderlyShutdown(fd.get());
     return true;
 }
 
 bool adb_query(const std::string& service, std::string* result, std::string* error) {
     D("adb_query: %s", service.c_str());
-    int fd = adb_connect(service, error);
+    unique_fd fd(adb_connect(service, error));
     if (fd < 0) {
         return false;
     }
 
     result->clear();
-    if (!ReadProtocolString(fd, result, error)) {
-        adb_close(fd);
+    if (!ReadProtocolString(fd.get(), result, error)) {
         return false;
     }
 
-    ReadOrderlyShutdown(fd);
-    adb_close(fd);
+    ReadOrderlyShutdown(fd.get());
     return true;
 }
 
diff --git a/adb/client/commandline.cpp b/adb/client/commandline.cpp
index e963e3d20..f70b48009 100644
--- a/adb/client/commandline.cpp
+++ b/adb/client/commandline.cpp
@@ -794,7 +794,7 @@ static int adb_abb(int argc, const char** argv) {
 
 static int adb_sideload_legacy(const char* filename, int in_fd, int size) {
     std::string error;
-    int out_fd = adb_connect(android::base::StringPrintf("sideload:%d", size), &error);
+    unique_fd out_fd(adb_connect(android::base::StringPrintf("sideload:%d", size), &error));
     if (out_fd < 0) {
         fprintf(stderr, "adb: pre-KitKat sideload connection failed: %s\n", error.c_str());
         return -1;
@@ -809,14 +809,12 @@ static int adb_sideload_legacy(const char* filename, int in_fd, int size) {
         unsigned xfer = (size > CHUNK_SIZE) ? CHUNK_SIZE : size;
         if (!ReadFdExactly(in_fd, buf, xfer)) {
             fprintf(stderr, "adb: failed to read data from %s: %s\n", filename, strerror(errno));
-            adb_close(out_fd);
             return -1;
         }
         if (!WriteFdExactly(out_fd, buf, xfer)) {
             std::string error;
             adb_status(out_fd, &error);
             fprintf(stderr, "adb: failed to write data: %s\n", error.c_str());
-            adb_close(out_fd);
             return -1;
         }
         size -= xfer;
@@ -827,11 +825,9 @@ static int adb_sideload_legacy(const char* filename, int in_fd, int size) {
 
     if (!adb_status(out_fd, &error)) {
         fprintf(stderr, "adb: error response: %s\n", error.c_str());
-        adb_close(out_fd);
         return -1;
     }
 
-    adb_close(out_fd);
     return 0;
 }
 
@@ -1091,7 +1087,7 @@ static bool adb_root(const char* command) {
 
 int send_shell_command(const std::string& command, bool disable_shell_protocol,
                        StandardStreamsCallbackInterface* callback) {
-    int fd;
+    unique_fd fd;
     bool use_shell_protocol = false;
 
     while (true) {
@@ -1114,7 +1110,7 @@ int send_shell_command(const std::string& command, bool disable_shell_protocol,
             std::string error;
             std::string service_string = ShellServiceString(use_shell_protocol, "", command);
 
-            fd = adb_connect(service_string, &error);
+            fd.reset(adb_connect(service_string, &error));
             if (fd >= 0) {
                 break;
             }
@@ -1126,13 +1122,7 @@ int send_shell_command(const std::string& command, bool disable_shell_protocol,
         }
     }
 
-    int exit_code = read_and_dump(fd, use_shell_protocol, callback);
-
-    if (adb_close(fd) < 0) {
-        PLOG(ERROR) << "failure closing FD " << fd;
-    }
-
-    return exit_code;
+    return read_and_dump(fd.get(), use_shell_protocol, callback);
 }
 
 static int logcat(int argc, const char** argv) {
@@ -1196,7 +1186,7 @@ static int backup(int argc, const char** argv) {
     if (argc < 2) error_exit("backup either needs a list of packages or -all/-shared");
 
     adb_unlink(filename);
-    int outFd = adb_creat(filename, 0640);
+    unique_fd outFd(adb_creat(filename, 0640));
     if (outFd < 0) {
         fprintf(stderr, "adb: backup unable to create file '%s': %s\n", filename, strerror(errno));
         return EXIT_FAILURE;
@@ -1211,20 +1201,16 @@ static int backup(int argc, const char** argv) {
 
     D("backup. filename=%s cmd=%s", filename, cmd.c_str());
     std::string error;
-    int fd = adb_connect(cmd, &error);
+    unique_fd fd(adb_connect(cmd, &error));
     if (fd < 0) {
         fprintf(stderr, "adb: unable to connect for backup: %s\n", error.c_str());
-        adb_close(outFd);
         return EXIT_FAILURE;
     }
 
     fprintf(stdout, "Now unlock your device and confirm the backup operation...\n");
     fflush(stdout);
 
-    copy_to_file(fd, outFd);
-
-    adb_close(fd);
-    adb_close(outFd);
+    copy_to_file(fd.get(), outFd.get());
     return EXIT_SUCCESS;
 }
 
@@ -1232,33 +1218,29 @@ static int restore(int argc, const char** argv) {
     if (argc != 2) error_exit("restore requires an argument");
 
     const char* filename = argv[1];
-    int tarFd = adb_open(filename, O_RDONLY);
+    unique_fd tarFd(adb_open(filename, O_RDONLY));
     if (tarFd < 0) {
         fprintf(stderr, "adb: unable to open file %s: %s\n", filename, strerror(errno));
         return -1;
     }
 
     std::string error;
-    int fd = adb_connect("restore:", &error);
+    unique_fd fd(adb_connect("restore:", &error));
     if (fd < 0) {
         fprintf(stderr, "adb: unable to connect for restore: %s\n", error.c_str());
-        adb_close(tarFd);
         return -1;
     }
 
     fprintf(stdout, "Now unlock your device and confirm the restore operation.\n");
     fflush(stdout);
 
-    copy_to_file(tarFd, fd);
+    copy_to_file(tarFd.get(), fd.get());
 
     // Provide an in-band EOD marker in case the archive file is malformed
-    write_zeros(512*2, fd);
+    write_zeros(512 * 2, fd);
 
     // Wait until the other side finishes, or it'll get sent SIGHUP.
-    copy_to_file(fd, STDOUT_FILENO);
-
-    adb_close(fd);
-    adb_close(tarFd);
+    copy_to_file(fd.get(), STDOUT_FILENO);
     return 0;
 }
 
@@ -1298,19 +1280,18 @@ static void parse_push_pull_args(const char** arg, int narg, std::vector<const c
 
 static int adb_connect_command(const std::string& command) {
     std::string error;
-    int fd = adb_connect(command, &error);
+    unique_fd fd(adb_connect(command, &error));
     if (fd < 0) {
         fprintf(stderr, "error: %s\n", error.c_str());
         return 1;
     }
     read_and_dump(fd);
-    adb_close(fd);
     return 0;
 }
 
 static int adb_connect_command_bidirectional(const std::string& command) {
     std::string error;
-    int fd = adb_connect(command, &error);
+    unique_fd fd(adb_connect(command, &error));
     if (fd < 0) {
         fprintf(stderr, "error: %s\n", error.c_str());
         return 1;
@@ -1336,11 +1317,10 @@ static int adb_connect_command_bidirectional(const std::string& command) {
         }
     };
 
-    std::thread read(forward, fd, STDOUT_FILENO, true);
-    std::thread write(forward, STDIN_FILENO, fd, false);
+    std::thread read(forward, fd.get(), STDOUT_FILENO, true);
+    std::thread write(forward, STDIN_FILENO, fd.get(), false);
     read.join();
     write.join();
-    adb_close(fd);
     return 0;
 }
 
@@ -1599,19 +1579,17 @@ int adb_commandline(int argc, const char** argv) {
         }
 
         std::string error;
-        int fd = adb_connect(cmd, &error);
+        unique_fd fd(adb_connect(cmd, &error));
         if (fd < 0) {
             fprintf(stderr, "error: %s\n", error.c_str());
             return -1;
         }
 
         if (exec_in) {
-            copy_to_file(STDIN_FILENO, fd);
+            copy_to_file(STDIN_FILENO, fd.get());
         } else {
-            copy_to_file(fd, STDOUT_FILENO);
+            copy_to_file(fd.get(), STDOUT_FILENO);
         }
-
-        adb_close(fd);
         return 0;
     } else if (!strcmp(argv[0], "kill-server")) {
         return adb_kill_server() ? 0 : 1;
@@ -1706,9 +1684,8 @@ int adb_commandline(int argc, const char** argv) {
             error_exit("error: %s", error_message.c_str());
         }
 
-        int fd = adb_connect(cmd, &error_message);
-        if (fd < 0 || !adb_status(fd, &error_message)) {
-            adb_close(fd);
+        unique_fd fd(adb_connect(cmd, &error_message));
+        if (fd < 0 || !adb_status(fd.get(), &error_message)) {
             error_exit("error: %s", error_message.c_str());
         }
 
diff --git a/adb/client/console.cpp b/adb/client/console.cpp
index 4e8a3f8cc..1dbb6e248 100644
--- a/adb/client/console.cpp
+++ b/adb/client/console.cpp
@@ -108,7 +108,7 @@ static int connect_to_console(const char* serial) {
 }
 
 int adb_send_emulator_command(int argc, const char** argv, const char* serial) {
-    int fd = connect_to_console(serial);
+    unique_fd fd(connect_to_console(serial));
     if (fd == -1) {
         return 1;
     }
@@ -125,7 +125,6 @@ int adb_send_emulator_command(int argc, const char** argv, const char* serial) {
     if (!WriteFdExactly(fd, commands)) {
         fprintf(stderr, "error: cannot write to emulator: %s\n",
                 strerror(errno));
-        adb_close(fd);
         return 1;
     }
 
@@ -178,7 +177,5 @@ int adb_send_emulator_command(int argc, const char** argv, const char* serial) {
     }
 
     printf("%s", emulator_output.c_str() + found);
-    adb_close(fd);
-
     return 0;
 }
diff --git a/adb/client/file_sync_client.cpp b/adb/client/file_sync_client.cpp
index f0f9a8068..b8827ef39 100644
--- a/adb/client/file_sync_client.cpp
+++ b/adb/client/file_sync_client.cpp
@@ -207,11 +207,10 @@ class SyncConnection {
 
         std::string error;
         if (!adb_get_feature_set(&features_, &error)) {
-            fd = -1;
             Error("failed to get feature set: %s", error.c_str());
         } else {
             have_stat_v2_ = CanUseFeature(features_, kFeatureStat2);
-            fd = adb_connect("sync:", &error);
+            fd.reset(adb_connect("sync:", &error));
             if (fd < 0) {
                 Error("connect failed: %s", error.c_str());
             }
@@ -230,7 +229,6 @@ class SyncConnection {
             // case, this will wait for the server to do orderly shutdown.
             ReadOrderlyShutdown(fd);
         }
-        adb_close(fd);
 
         line_printer_.KeepInfoLine();
     }
@@ -240,7 +238,7 @@ class SyncConnection {
     bool IsValid() { return fd >= 0; }
 
     bool ReceivedError(const char* from, const char* to) {
-        adb_pollfd pfd = {.fd = fd, .events = POLLIN};
+        adb_pollfd pfd = {.fd = fd.get(), .events = POLLIN};
         int rc = adb_poll(&pfd, 1, 0);
         if (rc < 0) {
             Error("failed to poll: %s", strerror(errno));
@@ -324,7 +322,7 @@ class SyncConnection {
 
         memset(st, 0, sizeof(*st));
         if (have_stat_v2_) {
-            if (!ReadFdExactly(fd, &msg.stat_v2, sizeof(msg.stat_v2))) {
+            if (!ReadFdExactly(fd.get(), &msg.stat_v2, sizeof(msg.stat_v2))) {
                 PLOG(FATAL) << "protocol fault: failed to read stat response";
             }
 
@@ -350,7 +348,7 @@ class SyncConnection {
             st->st_ctime = msg.stat_v2.ctime;
             return true;
         } else {
-            if (!ReadFdExactly(fd, &msg.stat_v1, sizeof(msg.stat_v1))) {
+            if (!ReadFdExactly(fd.get(), &msg.stat_v1, sizeof(msg.stat_v1))) {
                 PLOG(FATAL) << "protocol fault: failed to read stat response";
             }
 
@@ -437,7 +435,7 @@ class SyncConnection {
         uint64_t total_size = st.st_size;
         uint64_t bytes_copied = 0;
 
-        int lfd = adb_open(lpath, O_RDONLY);
+        unique_fd lfd(adb_open(lpath, O_RDONLY));
         if (lfd < 0) {
             Error("opening '%s' locally failed: %s", lpath, strerror(errno));
             return false;
@@ -449,7 +447,6 @@ class SyncConnection {
             int bytes_read = adb_read(lfd, sbuf.data, max - sizeof(SyncRequest));
             if (bytes_read == -1) {
                 Error("reading '%s' locally failed: %s", lpath, strerror(errno));
-                adb_close(lfd);
                 return false;
             } else if (bytes_read == 0) {
                 break;
@@ -469,8 +466,6 @@ class SyncConnection {
             ReportProgress(rpath, bytes_copied, total_size);
         }
 
-        adb_close(lfd);
-
         syncmsg msg;
         msg.data.id = ID_DONE;
         msg.data.size = mtime;
@@ -576,7 +571,7 @@ class SyncConnection {
     }
 
     // TODO: add a char[max] buffer here, to replace syncsendbuf...
-    int fd;
+    unique_fd fd;
     size_t max;
 
   private:
@@ -740,7 +735,7 @@ static bool sync_recv(SyncConnection& sc, const char* rpath, const char* lpath,
     if (!sc.SendRequest(ID_RECV, rpath)) return false;
 
     adb_unlink(lpath);
-    int lfd = adb_creat(lpath, 0644);
+    unique_fd lfd(adb_creat(lpath, 0644));
     if (lfd < 0) {
         sc.Error("cannot create '%s': %s", lpath, strerror(errno));
         return false;
@@ -750,7 +745,6 @@ static bool sync_recv(SyncConnection& sc, const char* rpath, const char* lpath,
     while (true) {
         syncmsg msg;
         if (!ReadFdExactly(sc.fd, &msg.data, sizeof(msg.data))) {
-            adb_close(lfd);
             adb_unlink(lpath);
             return false;
         }
@@ -758,7 +752,6 @@ static bool sync_recv(SyncConnection& sc, const char* rpath, const char* lpath,
         if (msg.data.id == ID_DONE) break;
 
         if (msg.data.id != ID_DATA) {
-            adb_close(lfd);
             adb_unlink(lpath);
             sc.ReportCopyFailure(rpath, lpath, msg);
             return false;
@@ -766,21 +759,18 @@ static bool sync_recv(SyncConnection& sc, const char* rpath, const char* lpath,
 
         if (msg.data.size > sc.max) {
             sc.Error("msg.data.size too large: %u (max %zu)", msg.data.size, sc.max);
-            adb_close(lfd);
             adb_unlink(lpath);
             return false;
         }
 
         char buffer[SYNC_DATA_MAX];
         if (!ReadFdExactly(sc.fd, buffer, msg.data.size)) {
-            adb_close(lfd);
             adb_unlink(lpath);
             return false;
         }
 
         if (!WriteFdExactly(lfd, buffer, msg.data.size)) {
             sc.Error("cannot write '%s': %s", lpath, strerror(errno));
-            adb_close(lfd);
             adb_unlink(lpath);
             return false;
         }
@@ -792,7 +782,6 @@ static bool sync_recv(SyncConnection& sc, const char* rpath, const char* lpath,
     }
 
     sc.RecordFilesTransferred(1);
-    adb_close(lfd);
     return true;
 }
 
diff --git a/adb/daemon/file_sync_service.cpp b/adb/daemon/file_sync_service.cpp
index 62c18c57d..56b5cd8d9 100644
--- a/adb/daemon/file_sync_service.cpp
+++ b/adb/daemon/file_sync_service.cpp
@@ -232,7 +232,7 @@ static bool handle_send_file(int s, const char* path, uid_t uid, gid_t gid, uint
 
     __android_log_security_bswrite(SEC_TAG_ADB_SEND_FILE, path);
 
-    int fd = adb_open_mode(path, O_WRONLY | O_CREAT | O_EXCL | O_CLOEXEC, mode);
+    unique_fd fd(adb_open_mode(path, O_WRONLY | O_CREAT | O_EXCL | O_CLOEXEC, mode));
 
     if (posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL | POSIX_FADV_NOREUSE | POSIX_FADV_WILLNEED) <
         0) {
@@ -244,16 +244,16 @@ static bool handle_send_file(int s, const char* path, uid_t uid, gid_t gid, uint
             SendSyncFailErrno(s, "secure_mkdirs failed");
             goto fail;
         }
-        fd = adb_open_mode(path, O_WRONLY | O_CREAT | O_EXCL | O_CLOEXEC, mode);
+        fd.reset(adb_open_mode(path, O_WRONLY | O_CREAT | O_EXCL | O_CLOEXEC, mode));
     }
     if (fd < 0 && errno == EEXIST) {
-        fd = adb_open_mode(path, O_WRONLY | O_CLOEXEC, mode);
+        fd.reset(adb_open_mode(path, O_WRONLY | O_CLOEXEC, mode));
     }
     if (fd < 0) {
         SendSyncFailErrno(s, "couldn't create file");
         goto fail;
     } else {
-        if (fchown(fd, uid, gid) == -1) {
+        if (fchown(fd.get(), uid, gid) == -1) {
             SendSyncFailErrno(s, "fchown failed");
             goto fail;
         }
@@ -266,7 +266,7 @@ static bool handle_send_file(int s, const char* path, uid_t uid, gid_t gid, uint
         // fchown clears the setuid bit - restore it if present.
         // Ignore the result of calling fchmod. It's not supported
         // by all filesystems, so we don't check for success. b/12441485
-        fchmod(fd, mode);
+        fchmod(fd.get(), mode);
     }
 
     while (true) {
@@ -288,14 +288,12 @@ static bool handle_send_file(int s, const char* path, uid_t uid, gid_t gid, uint
 
         if (!ReadFdExactly(s, &buffer[0], msg.data.size)) goto abort;
 
-        if (!WriteFdExactly(fd, &buffer[0], msg.data.size)) {
+        if (!WriteFdExactly(fd.get(), &buffer[0], msg.data.size)) {
             SendSyncFailErrno(s, "write failed");
             goto fail;
         }
     }
 
-    adb_close(fd);
-
     if (!update_capabilities(path, capabilities)) {
         SendSyncFailErrno(s, "update_capabilities failed");
         goto fail;
@@ -340,7 +338,6 @@ fail:
     }
 
 abort:
-    if (fd >= 0) adb_close(fd);
     if (do_unlink) adb_unlink(path);
     return false;
 }
@@ -445,35 +442,31 @@ static bool do_send(int s, const std::string& spec, std::vector<char>& buffer) {
 static bool do_recv(int s, const char* path, std::vector<char>& buffer) {
     __android_log_security_bswrite(SEC_TAG_ADB_RECV_FILE, path);
 
-    int fd = adb_open(path, O_RDONLY | O_CLOEXEC);
+    unique_fd fd(adb_open(path, O_RDONLY | O_CLOEXEC));
     if (fd < 0) {
         SendSyncFailErrno(s, "open failed");
         return false;
     }
 
-    if (posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL | POSIX_FADV_NOREUSE) < 0) {
+    if (posix_fadvise(fd.get(), 0, 0, POSIX_FADV_SEQUENTIAL | POSIX_FADV_NOREUSE) < 0) {
         D("[ Failed to fadvise: %d ]", errno);
     }
 
     syncmsg msg;
     msg.data.id = ID_DATA;
     while (true) {
-        int r = adb_read(fd, &buffer[0], buffer.size() - sizeof(msg.data));
+        int r = adb_read(fd.get(), &buffer[0], buffer.size() - sizeof(msg.data));
         if (r <= 0) {
             if (r == 0) break;
             SendSyncFailErrno(s, "read failed");
-            adb_close(fd);
             return false;
         }
         msg.data.size = r;
         if (!WriteFdExactly(s, &msg.data, sizeof(msg.data)) || !WriteFdExactly(s, &buffer[0], r)) {
-            adb_close(fd);
             return false;
         }
     }
 
-    adb_close(fd);
-
     msg.data.id = ID_DONE;
     msg.data.size = 0;
     return WriteFdExactly(s, &msg.data, sizeof(msg.data));
diff --git a/adb/daemon/jdwp_service.cpp b/adb/daemon/jdwp_service.cpp
index f02cc1350..032ee42a2 100644
--- a/adb/daemon/jdwp_service.cpp
+++ b/adb/daemon/jdwp_service.cpp
@@ -303,7 +303,6 @@ static void jdwp_control_event(int s, unsigned events, void* user);
 static int jdwp_control_init(JdwpControl* control, const char* sockname, int socknamelen) {
     sockaddr_un addr;
     socklen_t addrlen;
-    int s;
     int maxpath = sizeof(addr.sun_path);
     int pathlen = socknamelen;
 
@@ -316,7 +315,7 @@ static int jdwp_control_init(JdwpControl* control, const char* sockname, int soc
     addr.sun_family = AF_UNIX;
     memcpy(addr.sun_path, sockname, socknamelen);
 
-    s = socket(AF_UNIX, SOCK_SEQPACKET | SOCK_CLOEXEC, 0);
+    unique_fd s(socket(AF_UNIX, SOCK_SEQPACKET | SOCK_CLOEXEC, 0));
     if (s < 0) {
         D("could not create vm debug control socket. %d: %s", errno, strerror(errno));
         return -1;
@@ -326,22 +325,18 @@ static int jdwp_control_init(JdwpControl* control, const char* sockname, int soc
 
     if (bind(s, reinterpret_cast<sockaddr*>(&addr), addrlen) < 0) {
         D("could not bind vm debug control socket: %d: %s", errno, strerror(errno));
-        adb_close(s);
         return -1;
     }
 
     if (listen(s, 4) < 0) {
         D("listen failed in jdwp control socket: %d: %s", errno, strerror(errno));
-        adb_close(s);
         return -1;
     }
 
-    control->listen_socket = s;
-
-    control->fde = fdevent_create(s, jdwp_control_event, control);
+    control->listen_socket = s.release();
+    control->fde = fdevent_create(control->listen_socket, jdwp_control_event, control);
     if (control->fde == nullptr) {
         D("could not create fdevent for jdwp control socket");
-        adb_close(s);
         return -1;
     }
 
diff --git a/adb/fdevent_test.h b/adb/fdevent_test.h
index 8d853c369..24bce59a7 100644
--- a/adb/fdevent_test.h
+++ b/adb/fdevent_test.h
@@ -21,6 +21,7 @@
 #include <thread>
 
 #include "adb_io.h"
+#include "adb_unique_fd.h"
 #include "socket.h"
 #include "sysdeps.h"
 #include "sysdeps/chrono.h"
@@ -45,7 +46,7 @@ static void WaitForFdeventLoop() {
 
 class FdeventTest : public ::testing::Test {
   protected:
-    int dummy = -1;
+    unique_fd dummy;
 
     static void SetUpTestCase() {
 #if !defined(_WIN32)
@@ -65,12 +66,12 @@ class FdeventTest : public ::testing::Test {
             FAIL() << "failed to create socketpair: " << strerror(errno);
         }
 
-        asocket* dummy_socket = create_local_socket(dummy_fds[1]);
+        asocket* dummy_socket = create_local_socket(unique_fd(dummy_fds[1]));
         if (!dummy_socket) {
             FAIL() << "failed to create local socket: " << strerror(errno);
         }
         dummy_socket->ready(dummy_socket);
-        dummy = dummy_fds[0];
+        dummy.reset(dummy_fds[0]);
 
         thread_ = std::thread([]() { fdevent_loop(); });
         WaitForFdeventLoop();
@@ -85,7 +86,7 @@ class FdeventTest : public ::testing::Test {
         fdevent_terminate_loop();
         ASSERT_TRUE(WriteFdExactly(dummy, "", 1));
         thread_.join();
-        ASSERT_EQ(0, adb_close(dummy));
+        dummy.reset();
     }
 
     std::thread thread_;
diff --git a/adb/services.cpp b/adb/services.cpp
index 73fed0932..0061f0ead 100644
--- a/adb/services.cpp
+++ b/adb/services.cpp
@@ -71,7 +71,7 @@ unique_fd create_service_thread(const char* service_name, std::function<void(uni
     return unique_fd(s[0]);
 }
 
-int service_to_fd(std::string_view name, atransport* transport) {
+unique_fd service_to_fd(std::string_view name, atransport* transport) {
     unique_fd ret;
 
     if (is_socket_spec(name)) {
@@ -86,9 +86,9 @@ int service_to_fd(std::string_view name, atransport* transport) {
     }
 
     if (ret >= 0) {
-        close_on_exec(ret);
+        close_on_exec(ret.get());
     }
-    return ret.release();
+    return ret;
 }
 
 #if ADB_HOST
@@ -99,9 +99,7 @@ struct state_info {
     ConnectionState state;
 };
 
-static void wait_for_state(int fd, void* data) {
-    std::unique_ptr<state_info> sinfo(reinterpret_cast<state_info*>(data));
-
+static void wait_for_state(int fd, state_info* sinfo) {
     D("wait_for_state %d", sinfo->state);
 
     while (true) {
@@ -197,7 +195,7 @@ asocket* host_service_to_socket(const char* name, const char* serial, TransportI
     } else if (android::base::StartsWith(name, "wait-for-")) {
         name += strlen("wait-for-");
 
-        std::unique_ptr<state_info> sinfo = std::make_unique<state_info>();
+        std::shared_ptr<state_info> sinfo = std::make_shared<state_info>();
         if (sinfo == nullptr) {
             fprintf(stderr, "couldn't allocate state_info: %s", strerror(errno));
             return nullptr;
@@ -233,19 +231,15 @@ asocket* host_service_to_socket(const char* name, const char* serial, TransportI
             return nullptr;
         }
 
-        int fd = create_service_thread(
-                         "wait", std::bind(wait_for_state, std::placeholders::_1, sinfo.get()))
-                         .release();
-        if (fd != -1) {
-            sinfo.release();
-        }
-        return create_local_socket(fd);
+        unique_fd fd = create_service_thread("wait", [sinfo](int fd) {
+            wait_for_state(fd, sinfo.get());
+        });
+        return create_local_socket(std::move(fd));
     } else if (!strncmp(name, "connect:", 8)) {
         std::string host(name + strlen("connect:"));
-        int fd = create_service_thread("connect",
-                                       std::bind(connect_service, std::placeholders::_1, host))
-                         .release();
-        return create_local_socket(fd);
+        unique_fd fd = create_service_thread(
+                "connect", std::bind(connect_service, std::placeholders::_1, host));
+        return create_local_socket(std::move(fd));
     }
     return nullptr;
 }
diff --git a/adb/socket.h b/adb/socket.h
index e7df9916b..b8c559a90 100644
--- a/adb/socket.h
+++ b/adb/socket.h
@@ -23,6 +23,7 @@
 #include <memory>
 #include <string>
 
+#include "adb_unique_fd.h"
 #include "fdevent.h"
 #include "types.h"
 
@@ -102,7 +103,7 @@ void install_local_socket(asocket *s);
 void remove_socket(asocket *s);
 void close_all_sockets(atransport *t);
 
-asocket *create_local_socket(int fd);
+asocket* create_local_socket(unique_fd fd);
 asocket* create_local_service_socket(std::string_view destination, atransport* transport);
 
 asocket *create_remote_socket(unsigned id, atransport *t);
diff --git a/adb/socket_test.cpp b/adb/socket_test.cpp
index 80f9430b7..7908f82e9 100644
--- a/adb/socket_test.cpp
+++ b/adb/socket_test.cpp
@@ -58,7 +58,7 @@ TEST_F(LocalSocketTest, smoke) {
     intermediates.resize(INTERMEDIATE_COUNT);
     ASSERT_EQ(0, adb_socketpair(first)) << strerror(errno);
     ASSERT_EQ(0, adb_socketpair(last)) << strerror(errno);
-    asocket* prev_tail = create_local_socket(first[1]);
+    asocket* prev_tail = create_local_socket(unique_fd(first[1]));
     ASSERT_NE(nullptr, prev_tail);
 
     auto connect = [](asocket* tail, asocket* head) {
@@ -70,17 +70,17 @@ TEST_F(LocalSocketTest, smoke) {
     for (auto& intermediate : intermediates) {
         ASSERT_EQ(0, adb_socketpair(intermediate.data())) << strerror(errno);
 
-        asocket* head = create_local_socket(intermediate[0]);
+        asocket* head = create_local_socket(unique_fd(intermediate[0]));
         ASSERT_NE(nullptr, head);
 
-        asocket* tail = create_local_socket(intermediate[1]);
+        asocket* tail = create_local_socket(unique_fd(intermediate[1]));
         ASSERT_NE(nullptr, tail);
 
         connect(prev_tail, head);
         prev_tail = tail;
     }
 
-    asocket* end = create_local_socket(last[0]);
+    asocket* end = create_local_socket(unique_fd(last[0]));
     ASSERT_NE(nullptr, end);
     connect(prev_tail, end);
 
@@ -104,14 +104,14 @@ TEST_F(LocalSocketTest, smoke) {
 }
 
 struct CloseWithPacketArg {
-    int socket_fd;
+    unique_fd socket_fd;
     size_t bytes_written;
-    int cause_close_fd;
+    unique_fd cause_close_fd;
 };
 
 static void CreateCloser(CloseWithPacketArg* arg) {
     fdevent_run_on_main_thread([arg]() {
-        asocket* s = create_local_socket(arg->socket_fd);
+        asocket* s = create_local_socket(std::move(arg->socket_fd));
         ASSERT_TRUE(s != nullptr);
         arg->bytes_written = 0;
 
@@ -135,7 +135,7 @@ static void CreateCloser(CloseWithPacketArg* arg) {
         }
         ASSERT_TRUE(socket_filled);
 
-        asocket* cause_close_s = create_local_socket(arg->cause_close_fd);
+        asocket* cause_close_s = create_local_socket(std::move(arg->cause_close_fd));
         ASSERT_TRUE(cause_close_s != nullptr);
         cause_close_s->peer = s;
         s->peer = cause_close_s;
@@ -154,8 +154,8 @@ TEST_F(LocalSocketTest, close_socket_with_packet) {
     int cause_close_fd[2];
     ASSERT_EQ(0, adb_socketpair(cause_close_fd));
     CloseWithPacketArg arg;
-    arg.socket_fd = socket_fd[1];
-    arg.cause_close_fd = cause_close_fd[1];
+    arg.socket_fd.reset(socket_fd[1]);
+    arg.cause_close_fd.reset(cause_close_fd[1]);
 
     PrepareThread();
     CreateCloser(&arg);
@@ -178,8 +178,8 @@ TEST_F(LocalSocketTest, read_from_closing_socket) {
     int cause_close_fd[2];
     ASSERT_EQ(0, adb_socketpair(cause_close_fd));
     CloseWithPacketArg arg;
-    arg.socket_fd = socket_fd[1];
-    arg.cause_close_fd = cause_close_fd[1];
+    arg.socket_fd.reset(socket_fd[1]);
+    arg.cause_close_fd.reset(cause_close_fd[1]);
 
     PrepareThread();
     CreateCloser(&arg);
@@ -211,8 +211,8 @@ TEST_F(LocalSocketTest, write_error_when_having_packets) {
     int cause_close_fd[2];
     ASSERT_EQ(0, adb_socketpair(cause_close_fd));
     CloseWithPacketArg arg;
-    arg.socket_fd = socket_fd[1];
-    arg.cause_close_fd = cause_close_fd[1];
+    arg.socket_fd.reset(socket_fd[1]);
+    arg.cause_close_fd.reset(cause_close_fd[1]);
 
     PrepareThread();
     CreateCloser(&arg);
@@ -233,8 +233,8 @@ TEST_F(LocalSocketTest, flush_after_shutdown) {
     ASSERT_EQ(0, adb_socketpair(head_fd));
     ASSERT_EQ(0, adb_socketpair(tail_fd));
 
-    asocket* head = create_local_socket(head_fd[1]);
-    asocket* tail = create_local_socket(tail_fd[1]);
+    asocket* head = create_local_socket(unique_fd(head_fd[1]));
+    asocket* tail = create_local_socket(unique_fd(tail_fd[1]));
 
     head->peer = tail;
     head->ready(head);
@@ -287,7 +287,7 @@ TEST_F(LocalSocketTest, close_socket_in_CLOSE_WAIT_state) {
     PrepareThread();
 
     fdevent_run_on_main_thread([accept_fd]() {
-        asocket* s = create_local_socket(accept_fd);
+        asocket* s = create_local_socket(unique_fd(accept_fd));
         ASSERT_TRUE(s != nullptr);
     });
 
diff --git a/adb/sockets.cpp b/adb/sockets.cpp
index 47ae883f4..28da975f5 100644
--- a/adb/sockets.cpp
+++ b/adb/sockets.cpp
@@ -333,7 +333,8 @@ static void local_socket_event_func(int fd, unsigned ev, void* _s) {
     }
 }
 
-asocket* create_local_socket(int fd) {
+asocket* create_local_socket(unique_fd ufd) {
+    int fd = ufd.release();
     asocket* s = new asocket();
     s->fd = fd;
     s->enqueue = local_socket_enqueue;
@@ -353,13 +354,13 @@ asocket* create_local_service_socket(std::string_view name, atransport* transpor
         return s;
     }
 #endif
-    int fd = service_to_fd(name, transport);
+    unique_fd fd = service_to_fd(name, transport);
     if (fd < 0) {
         return nullptr;
     }
 
-    asocket* s = create_local_socket(fd);
-    LOG(VERBOSE) << "LS(" << s->id << "): bound to '" << name << "' via " << fd;
+    asocket* s = create_local_socket(std::move(fd));
+    LOG(VERBOSE) << "LS(" << s->id << "): bound to '" << name << "' via " << fd.get();
 
 #if !ADB_HOST
     if ((name.starts_with("root:") && getuid() != 0 && __android_log_is_debuggable()) ||