adb: update symlink timestamps.
Bug: http://b/120162375
Test: adb sync; adb shell touch -h -d 2008-01-0101:01:01 /system/bin/ls; adb sync; adb sync
Change-Id: Iedf54528b164913739c66c71d20006e484a4f5e4
diff --git a/adb/client/file_sync_client.cpp b/adb/client/file_sync_client.cpp
index b8827ef..7e470e1 100644
--- a/adb/client/file_sync_client.cpp
+++ b/adb/client/file_sync_client.cpp
@@ -681,9 +681,7 @@
if (sync) {
struct stat st;
if (sync_lstat(sc, rpath, &st)) {
- // For links, we cannot update the atime/mtime.
- if ((S_ISREG(mode & st.st_mode) && st.st_mtime == static_cast<time_t>(mtime)) ||
- (S_ISLNK(mode & st.st_mode) && st.st_mtime >= static_cast<time_t>(mtime))) {
+ if (st.st_mtime == static_cast<time_t>(mtime)) {
sc.RecordFilesSkipped(1);
return true;
}
@@ -921,12 +919,8 @@
for (copyinfo& ci : file_list) {
struct stat st;
if (sc.FinishStat(&st)) {
- if (st.st_size == static_cast<off_t>(ci.size)) {
- // For links, we cannot update the atime/mtime.
- if ((S_ISREG(ci.mode & st.st_mode) && st.st_mtime == ci.time) ||
- (S_ISLNK(ci.mode & st.st_mode) && st.st_mtime >= ci.time)) {
- ci.skip = true;
- }
+ if (st.st_size == static_cast<off_t>(ci.size) && st.st_mtime == ci.time) {
+ ci.skip = true;
}
}
}
diff --git a/adb/daemon/file_sync_service.cpp b/adb/daemon/file_sync_service.cpp
index 9e1760d..70deb31 100644
--- a/adb/daemon/file_sync_service.cpp
+++ b/adb/daemon/file_sync_service.cpp
@@ -27,6 +27,7 @@
#include <string.h>
#include <sys/mount.h>
#include <sys/stat.h>
+#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <utime.h>
@@ -242,10 +243,10 @@
return SendSyncFail(fd, StringPrintf("%s: %s", reason.c_str(), strerror(errno)));
}
-static bool handle_send_file(int s, const char* path, uid_t uid, gid_t gid, uint64_t capabilities,
- mode_t mode, std::vector<char>& buffer, bool do_unlink) {
+static bool handle_send_file(int s, const char* path, uint32_t* timestamp, uid_t uid, gid_t gid,
+ uint64_t capabilities, mode_t mode, std::vector<char>& buffer,
+ bool do_unlink) {
syncmsg msg;
- unsigned int timestamp = 0;
__android_log_security_bswrite(SEC_TAG_ADB_SEND_FILE, path);
@@ -291,7 +292,7 @@
if (msg.data.id != ID_DATA) {
if (msg.data.id == ID_DONE) {
- timestamp = msg.data.size;
+ *timestamp = msg.data.size;
break;
}
SendSyncFail(s, "invalid data message");
@@ -316,11 +317,6 @@
goto fail;
}
- utimbuf u;
- u.actime = timestamp;
- u.modtime = timestamp;
- utime(path, &u);
-
msg.status.id = ID_OKAY;
msg.status.msglen = 0;
return WriteFdExactly(s, &msg.status, sizeof(msg.status));
@@ -360,9 +356,12 @@
}
#if defined(_WIN32)
-extern bool handle_send_link(int s, const std::string& path, std::vector<char>& buffer) __attribute__((error("no symlinks on Windows")));
+extern bool handle_send_link(int s, const std::string& path,
+ uint32_t* timestamp, std::vector<char>& buffer)
+ __attribute__((error("no symlinks on Windows")));
#else
-static bool handle_send_link(int s, const std::string& path, std::vector<char>& buffer) {
+static bool handle_send_link(int s, const std::string& path, uint32_t* timestamp,
+ std::vector<char>& buffer) {
syncmsg msg;
if (!ReadFdExactly(s, &msg.data, sizeof(msg.data))) return false;
@@ -399,6 +398,7 @@
if (!ReadFdExactly(s, &msg.data, sizeof(msg.data))) return false;
if (msg.data.id == ID_DONE) {
+ *timestamp = msg.data.size;
msg.status.id = ID_OKAY;
msg.status.msglen = 0;
if (!WriteFdExactly(s, &msg.status, sizeof(msg.status))) return false;
@@ -448,24 +448,40 @@
adb_unlink(path.c_str());
}
+ bool result;
+ uint32_t timestamp;
if (S_ISLNK(mode)) {
- return handle_send_link(s, path.c_str(), buffer);
+ result = handle_send_link(s, path.c_str(), ×tamp, buffer);
+ } else {
+ // Copy user permission bits to "group" and "other" permissions.
+ mode &= 0777;
+ mode |= ((mode >> 3) & 0070);
+ mode |= ((mode >> 3) & 0007);
+
+ uid_t uid = -1;
+ gid_t gid = -1;
+ uint64_t capabilities = 0;
+ if (should_use_fs_config(path)) {
+ unsigned int broken_api_hack = mode;
+ fs_config(path.c_str(), 0, nullptr, &uid, &gid, &broken_api_hack, &capabilities);
+ mode = broken_api_hack;
+ }
+
+ result = handle_send_file(s, path.c_str(), ×tamp, uid, gid, capabilities, mode, buffer,
+ do_unlink);
}
- // Copy user permission bits to "group" and "other" permissions.
- mode &= 0777;
- mode |= ((mode >> 3) & 0070);
- mode |= ((mode >> 3) & 0007);
-
- uid_t uid = -1;
- gid_t gid = -1;
- uint64_t capabilities = 0;
- if (should_use_fs_config(path)) {
- unsigned int broken_api_hack = mode;
- fs_config(path.c_str(), 0, nullptr, &uid, &gid, &broken_api_hack, &capabilities);
- mode = broken_api_hack;
+ if (!result) {
+ return false;
}
- return handle_send_file(s, path.c_str(), uid, gid, capabilities, mode, buffer, do_unlink);
+
+ struct timeval tv[2];
+ tv[0].tv_sec = timestamp;
+ tv[0].tv_usec = 0;
+ tv[1].tv_sec = timestamp;
+ tv[1].tv_usec = 0;
+ lutimes(path.c_str(), tv);
+ return true;
}
static bool do_recv(int s, const char* path, std::vector<char>& buffer) {
diff --git a/adb/transport.cpp b/adb/transport.cpp
index 90f94ee..0c7b0b6 100644
--- a/adb/transport.cpp
+++ b/adb/transport.cpp
@@ -71,6 +71,7 @@
const char* const kFeatureApex = "apex";
const char* const kFeatureFixedPushMkdir = "fixed_push_mkdir";
const char* const kFeatureAbb = "abb";
+const char* const kFeatureFixedPushSymlinkTimestamp = "fixed_push_symlink_timestamp";
namespace {
@@ -1005,8 +1006,13 @@
const FeatureSet& supported_features() {
// Local static allocation to avoid global non-POD variables.
static const FeatureSet* features = new FeatureSet{
- kFeatureShell2, kFeatureCmd, kFeatureStat2,
- kFeatureFixedPushMkdir, kFeatureApex, kFeatureAbb,
+ kFeatureShell2,
+ kFeatureCmd,
+ kFeatureStat2,
+ kFeatureFixedPushMkdir,
+ kFeatureApex,
+ kFeatureAbb,
+ kFeatureFixedPushSymlinkTimestamp,
// Increment ADB_SERVER_VERSION when adding a feature that adbd needs
// to know about. Otherwise, the client can be stuck running an old
// version of the server even after upgrading their copy of adb.
diff --git a/adb/transport.h b/adb/transport.h
index 065c81f..a0174b8 100644
--- a/adb/transport.h
+++ b/adb/transport.h
@@ -67,6 +67,8 @@
extern const char* const kFeatureFixedPushMkdir;
// adbd supports android binder bridge (abb).
extern const char* const kFeatureAbb;
+// adbd properly updates symlink timestamps on push.
+extern const char* const kFeatureFixedPushSymlinkTimestamp;
TransportId NextTransportId();
