adb: add "adb unroot" to restart adb in non-root mode (9885881d) · Commits · e / os / android_system_core

adb/adb.c

+26 −25

Original line number	Diff line number	Diff line
		@@ -1261,35 +1261,36 @@ static void drop_capabilities_bounding_set_if_needed() {
		}
		}

		static int should_drop_privileges() {
		#ifndef ALLOW_ADBD_ROOT
		return 1;
		#else /* ALLOW_ADBD_ROOT */
		int secure = 0;
		static bool should_drop_privileges() {
		#if defined(ALLOW_ADBD_ROOT)
		char value[PROPERTY_VALUE_MAX];

		/* run adbd in secure mode if ro.secure is set and
		** we are not in the emulator
		*/
		// The emulator is never secure, so don't drop privileges there.
		// TODO: this seems like a bug --- shouldn't the emulator behave like a device?
		property_get("ro.kernel.qemu", value, "");
		if (strcmp(value, "1") != 0) {
		property_get("ro.secure", value, "1");
		if (strcmp(value, "1") == 0) {
		// don't run as root if ro.secure is set...
		secure = 1;
		return false;
		}

		// Don't run as root if ro.secure is set...
		property_get("ro.secure", value, "1");
		bool ro_secure = (strcmp(value, "1") == 0);

		// ... except we allow running as root in userdebug builds if the
		// service.adb.root property has been set by the "adb root" command
		property_get("ro.debuggable", value, "");
		if (strcmp(value, "1") == 0) {
		bool ro_debuggable = (strcmp(value, "1") == 0);

		property_get("service.adb.root", value, "");
		if (strcmp(value, "1") == 0) {
		secure = 0;
		}
		}
		bool adb_root = (strcmp(value, "1") == 0);
		bool adb_unroot = (strcmp(value, "0") == 0);
		if (adb_unroot) {
		return true; // The user explicitly wants us to drop privileges.
		}
		}
		return secure;

		return ro_secure \|\| !ro_debuggable;
		#else
		return true; // "adb root" not allowed, always drop privileges.
		#endif /* ALLOW_ADBD_ROOT */
		}
		#endif /* !ADB_HOST */

adb/commandline.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -210,6 +210,7 @@ void help()
		" adb reboot [bootloader\|recovery] - reboots the device, optionally into the bootloader or recovery program\n"
		" adb reboot-bootloader - reboots the device into the bootloader\n"
		" adb root - restarts the adbd daemon with root permissions\n"
		" adb unroot - restarts the adbd daemon without root permissions\n"
		" adb usb - restarts the adbd daemon listening on USB\n"
		" adb tcpip <port> - restarts the adbd daemon listening on TCP on the specified port\n"
		"networking:\n"
		@@ -1473,6 +1474,7 @@ int adb_commandline(int argc, char **argv)
		!strcmp(argv[0], "tcpip") \|\|
		!strcmp(argv[0], "usb") \|\|
		!strcmp(argv[0], "root") \|\|
		!strcmp(argv[0], "unroot") \|\|
		!strcmp(argv[0], "disable-verity") \|\|
		!strcmp(argv[0], "enable-verity")) {
		char command[100];

adb/services.c

+18 −0

Original line number	Diff line number	Diff line
		@@ -82,6 +82,22 @@ void restart_root_service(int fd, void *cookie)
		}
		}

		void restart_unroot_service(int fd, void *cookie)
		{
		char buf[100];

		if (getuid() != 0) {
		snprintf(buf, sizeof(buf), "adbd not running as root\n");
		writex(fd, buf, strlen(buf));
		adb_close(fd);
		} else {
		property_set("service.adb.root", "0");
		snprintf(buf, sizeof(buf), "restarting adbd as non root\n");
		writex(fd, buf, strlen(buf));
		adb_close(fd);
		}
		}

		void restart_tcp_service(int fd, void *cookie)
		{
		char buf[100];
		@@ -437,6 +453,8 @@ int service_to_fd(const char *name)
		ret = create_service_thread(reboot_service, arg);
		} else if(!strncmp(name, "root:", 5)) {
		ret = create_service_thread(restart_root_service, NULL);
		} else if(!strncmp(name, "unroot:", 7)) {
		ret = create_service_thread(restart_unroot_service, NULL);
		} else if(!strncmp(name, "backup:", 7)) {
		char* arg = strdup(name + 7);
		if (arg == NULL) return -1;

adb/sockets.c

+5 −10

Original line number	Diff line number	Diff line
		@@ -430,12 +430,6 @@ asocket *create_local_socket(int fd)

		asocket create_local_service_socket(const char name)
		{
		asocket *s;
		int fd;
		#if !ADB_HOST
		char debug[PROPERTY_VALUE_MAX];
		#endif

		#if !ADB_HOST
		if (!strcmp(name,"jdwp")) {
		return create_jdwp_service_socket();
		@@ -444,18 +438,19 @@ asocket create_local_service_socket(const char name)
		return create_jdwp_tracker_service_socket();
		}
		#endif
		fd = service_to_fd(name);
		int fd = service_to_fd(name);
		if(fd < 0) return 0;

		s = create_local_socket(fd);
		asocket* s = create_local_socket(fd);
		D("LS(%d): bound to '%s' via %d\n", s->id, name, fd);

		#if !ADB_HOST
		char debug[PROPERTY_VALUE_MAX];
		if (!strncmp(name, "root:", 5))
		property_get("ro.debuggable", debug, "");

		if ((!strncmp(name, "root:", 5) && getuid() != 0
		&& strcmp(debug, "1") == 0)
		if ((!strncmp(name, "root:", 5) && getuid() != 0 && strcmp(debug, "1") == 0)
		\|\| (!strncmp(name, "unroot:", 7) && getuid() == 0)
		\|\| !strncmp(name, "usb:", 4)
		\|\| !strncmp(name, "tcpip:", 6)) {
		D("LS(%d): enabling exit_on_close\n", s->id);

adb/tests/test_adb.py

100644 → 100755

+19 −2

Original line number	Diff line number	Diff line
		@@ -8,11 +8,11 @@ import hashlib
		import os
		import random
		import re
		import shlex
		import subprocess
		import sys
		import tempfile
		import unittest
		import sys
		import shlex


		def trace(cmd):
		@@ -181,6 +181,12 @@ class AdbWrapper(object):
		def usb(self):
		return call_checked(self.adb_cmd + "usb")

		def root(self):
		return call_checked(self.adb_cmd + "root")

		def unroot(self):
		return call_checked(self.adb_cmd + "unroot")

		def forward_remove(self, local):
		return call_checked(self.adb_cmd + "forward --remove {}".format(local))

		@@ -233,6 +239,17 @@ class AdbBasic(unittest.TestCase):
		version_num = True
		self.assertTrue(version_num)

		def test_root_unroot(self):
		"""Make sure that adb root and adb unroot work, using id(1)."""
		for device in get_device_list():
		adb = AdbWrapper(device)
		adb.root()
		adb.wait()
		self.assertEqual("root", adb.shell("id -un").strip())
		adb.unroot()
		adb.wait()
		self.assertEqual("shell", adb.shell("id -un").strip())


		class AdbFile(unittest.TestCase):
		SCRATCH_DIR = "/data/local/tmp"