diff --git a/include/log/logger.h b/include/log/logger.h
index b3928a7..60d47a2 100644
--- a/include/log/logger.h
+++ b/include/log/logger.h
@@ -64,12 +64,24 @@
     char        msg[0];    /* the entry's payload */
 } __attribute__((__packed__));
 
+struct logger_entry_v4 {
+    uint16_t    len;       /* length of the payload */
+    uint16_t    hdr_size;  /* sizeof(struct logger_entry_v4) */
+    int32_t     pid;       /* generating process's pid */
+    uint32_t    tid;       /* generating process's tid */
+    uint32_t    sec;       /* seconds since Epoch */
+    uint32_t    nsec;      /* nanoseconds */
+    uint32_t    lid;       /* log id of the payload, bottom 4 bits currently */
+    uint32_t    uid;       /* generating process's uid */
+    char        msg[0];    /* the entry's payload */
+} __attribute__((__packed__));
+
 /*
  * The maximum size of the log entry payload that can be
  * written to the logger. An attempt to write more than
  * this amount will result in a truncated log entry.
  */
-#define LOGGER_ENTRY_MAX_PAYLOAD	4076
+#define LOGGER_ENTRY_MAX_PAYLOAD	4068
 
 /*
  * The maximum size of a log entry which can be read from the
@@ -83,7 +95,8 @@
 struct log_msg {
     union {
         unsigned char buf[LOGGER_ENTRY_MAX_LEN + 1];
-        struct logger_entry_v3 entry;
+        struct logger_entry_v4 entry;
+        struct logger_entry_v4 entry_v4;
         struct logger_entry_v3 entry_v3;
         struct logger_entry_v2 entry_v2;
         struct logger_entry    entry_v1;
diff --git a/include/log/logprint.h b/include/log/logprint.h
index 204b3f2..539d1dc 100644
--- a/include/log/logprint.h
+++ b/include/log/logprint.h
@@ -44,6 +44,7 @@
     FORMAT_MODIFIER_ZONE,      /* Adds zone to date */
     FORMAT_MODIFIER_EPOCH,     /* Print time as seconds since Jan 1 1970 */
     FORMAT_MODIFIER_MONOTONIC, /* Print cpu time as seconds since start */
+    FORMAT_MODIFIER_UID,       /* Adds uid */
 } AndroidLogPrintFormat;
 
 typedef struct AndroidLogFormat_t AndroidLogFormat;
@@ -52,6 +53,7 @@
     time_t tv_sec;
     long tv_nsec;
     android_LogPriority priority;
+    int32_t uid;
     int32_t pid;
     int32_t tid;
     const char * tag;
diff --git a/liblog/log_read.c b/liblog/log_read.c
index fb86757..4503219 100644
--- a/liblog/log_read.c
+++ b/liblog/log_read.c
@@ -634,6 +634,7 @@
         android_log_header_t l;
     } buf;
     static uint8_t preread_count;
+    bool is_system;
 
     memset(log_msg, 0, sizeof(*log_msg));
 
@@ -690,12 +691,15 @@
             }
 
             uid = get_best_effective_uid();
-            if (!uid_has_log_permission(uid) && (uid != buf.p.uid)) {
+            is_system = uid_has_log_permission(uid);
+            if (!is_system && (uid != buf.p.uid)) {
                 break;
             }
 
             ret = TEMP_FAILURE_RETRY(read(logger_list->sock,
-                                          log_msg->entry_v3.msg,
+                                          is_system ?
+                                              log_msg->entry_v4.msg :
+                                              log_msg->entry_v3.msg,
                                           buf.p.len - sizeof(buf)));
             if (ret < 0) {
                 return -errno;
@@ -704,13 +708,18 @@
                 return -EIO;
             }
 
-            log_msg->entry_v3.len = buf.p.len - sizeof(buf);
-            log_msg->entry_v3.hdr_size = sizeof(log_msg->entry_v3);
-            log_msg->entry_v3.pid = buf.p.pid;
-            log_msg->entry_v3.tid = buf.l.tid;
-            log_msg->entry_v3.sec = buf.l.realtime.tv_sec;
-            log_msg->entry_v3.nsec = buf.l.realtime.tv_nsec;
-            log_msg->entry_v3.lid = buf.l.id;
+            log_msg->entry_v4.len = buf.p.len - sizeof(buf);
+            log_msg->entry_v4.hdr_size = is_system ?
+                sizeof(log_msg->entry_v4) :
+                sizeof(log_msg->entry_v3);
+            log_msg->entry_v4.pid = buf.p.pid;
+            log_msg->entry_v4.tid = buf.l.tid;
+            log_msg->entry_v4.sec = buf.l.realtime.tv_sec;
+            log_msg->entry_v4.nsec = buf.l.realtime.tv_nsec;
+            log_msg->entry_v4.lid = buf.l.id;
+            if (is_system) {
+                log_msg->entry_v4.uid = buf.p.uid;
+            }
 
             return ret;
         }
diff --git a/liblog/logprint.c b/liblog/logprint.c
index 40e13f4..746eb8a 100644
--- a/liblog/logprint.c
+++ b/liblog/logprint.c
@@ -32,6 +32,7 @@
 #include <cutils/list.h>
 #include <log/logd.h>
 #include <log/logprint.h>
+#include <private/android_filesystem_config.h>
 
 #define MS_PER_NSEC 1000000
 #define US_PER_NSEC 1000
@@ -56,6 +57,7 @@
     bool zone_output;
     bool epoch_output;
     bool monotonic_output;
+    bool uid_output;
 };
 
 /*
@@ -204,6 +206,7 @@
     p_ret->zone_output = false;
     p_ret->epoch_output = false;
     p_ret->monotonic_output = android_log_clockid() == CLOCK_MONOTONIC;
+    p_ret->uid_output = false;
 
     return p_ret;
 }
@@ -258,6 +261,9 @@
     case FORMAT_MODIFIER_MONOTONIC:
         p_format->monotonic_output = true;
         return 0;
+    case FORMAT_MODIFIER_UID:
+        p_format->uid_output = true;
+        return 0;
     default:
         break;
     }
@@ -290,6 +296,7 @@
     else if (strcmp(formatString, "zone") == 0) format = FORMAT_MODIFIER_ZONE;
     else if (strcmp(formatString, "epoch") == 0) format = FORMAT_MODIFIER_EPOCH;
     else if (strcmp(formatString, "monotonic") == 0) format = FORMAT_MODIFIER_MONOTONIC;
+    else if (strcmp(formatString, "uid") == 0) format = FORMAT_MODIFIER_UID;
     else {
         extern char *tzname[2];
         static const char gmt[] = "GMT";
@@ -451,6 +458,7 @@
 {
     entry->tv_sec = buf->sec;
     entry->tv_nsec = buf->nsec;
+    entry->uid = -1;
     entry->pid = buf->pid;
     entry->tid = buf->tid;
 
@@ -482,6 +490,9 @@
     struct logger_entry_v2 *buf2 = (struct logger_entry_v2 *)buf;
     if (buf2->hdr_size) {
         msg = ((char *)buf2) + buf2->hdr_size;
+        if (buf2->hdr_size >= sizeof(struct logger_entry_v4)) {
+            entry->uid = ((struct logger_entry_v4 *)buf)->uid;
+        }
     }
     for (i = 1; i < buf->len; i++) {
         if (msg[i] == '\0') {
@@ -734,6 +745,7 @@
     entry->tv_sec = buf->sec;
     entry->tv_nsec = buf->nsec;
     entry->priority = ANDROID_LOG_INFO;
+    entry->uid = -1;
     entry->pid = buf->pid;
     entry->tid = buf->tid;
 
@@ -744,6 +756,9 @@
     struct logger_entry_v2 *buf2 = (struct logger_entry_v2 *)buf;
     if (buf2->hdr_size) {
         eventData = ((unsigned char *)buf2) + buf2->hdr_size;
+        if (buf2->hdr_size >= sizeof(struct logger_entry_v4)) {
+            entry->uid = ((struct logger_entry_v4 *)buf)->uid;
+        }
     }
     inCount = buf->len;
     if (inCount < 4)
@@ -1238,7 +1253,7 @@
     char prefixBuf[128], suffixBuf[128];
     char priChar;
     int prefixSuffixIsHeaderFooter = 0;
-    char *ret = NULL;
+    char *ret;
     time_t now;
     unsigned long nsec;
 
@@ -1310,6 +1325,30 @@
         suffixLen = MIN(suffixLen, sizeof(suffixBuf));
     }
 
+    char uid[16];
+    uid[0] = '\0';
+    if (p_format->uid_output) {
+        if (entry->uid >= 0) {
+            const struct android_id_info *info = android_ids;
+            size_t i;
+
+            for (i = 0; i < android_id_count; ++i) {
+                if (info->aid == (unsigned int)entry->uid) {
+                    break;
+                }
+                ++info;
+            }
+            if ((i < android_id_count) && (strlen(info->name) <= 5)) {
+                 snprintf(uid, sizeof(uid), "%5s:", info->name);
+            } else {
+                 // Not worth parsing package list, names all longer than 5
+                 snprintf(uid, sizeof(uid), "%5d:", entry->uid);
+            }
+        } else {
+            snprintf(uid, sizeof(uid), "      ");
+        }
+    }
+
     switch (p_format->format) {
         case FORMAT_TAG:
             len = snprintf(prefixBuf + prefixLen, sizeof(prefixBuf) - prefixLen,
@@ -1322,11 +1361,11 @@
                 "  (%s)\n", entry->tag);
             suffixLen += MIN(len, sizeof(suffixBuf) - suffixLen);
             len = snprintf(prefixBuf + prefixLen, sizeof(prefixBuf) - prefixLen,
-                "%c(%5d) ", priChar, entry->pid);
+                "%c(%s%5d) ", priChar, uid, entry->pid);
             break;
         case FORMAT_THREAD:
             len = snprintf(prefixBuf + prefixLen, sizeof(prefixBuf) - prefixLen,
-                "%c(%5d:%5d) ", priChar, entry->pid, entry->tid);
+                "%c(%s%5d:%5d) ", priChar, uid, entry->pid, entry->tid);
             strcpy(suffixBuf + suffixLen, "\n");
             ++suffixLen;
             break;
@@ -1338,21 +1377,26 @@
             break;
         case FORMAT_TIME:
             len = snprintf(prefixBuf + prefixLen, sizeof(prefixBuf) - prefixLen,
-                "%s %c/%-8s(%5d): ", timeBuf, priChar, entry->tag, entry->pid);
+                "%s %c/%-8s(%s%5d): ", timeBuf, priChar, entry->tag,
+                uid, entry->pid);
             strcpy(suffixBuf + suffixLen, "\n");
             ++suffixLen;
             break;
         case FORMAT_THREADTIME:
+            ret = strchr(uid, ':');
+            if (ret) {
+                *ret = ' ';
+            }
             len = snprintf(prefixBuf + prefixLen, sizeof(prefixBuf) - prefixLen,
-                "%s %5d %5d %c %-8s: ", timeBuf,
-                entry->pid, entry->tid, priChar, entry->tag);
+                "%s %s%5d %5d %c %-8s: ", timeBuf,
+                uid, entry->pid, entry->tid, priChar, entry->tag);
             strcpy(suffixBuf + suffixLen, "\n");
             ++suffixLen;
             break;
         case FORMAT_LONG:
             len = snprintf(prefixBuf + prefixLen, sizeof(prefixBuf) - prefixLen,
-                "[ %s %5d:%5d %c/%-8s ]\n",
-                timeBuf, entry->pid, entry->tid, priChar, entry->tag);
+                "[ %s %s%5d:%5d %c/%-8s ]\n",
+                timeBuf, uid, entry->pid, entry->tid, priChar, entry->tag);
             strcpy(suffixBuf + suffixLen, "\n\n");
             suffixLen += 2;
             prefixSuffixIsHeaderFooter = 1;
@@ -1360,7 +1404,7 @@
         case FORMAT_BRIEF:
         default:
             len = snprintf(prefixBuf + prefixLen, sizeof(prefixBuf) - prefixLen,
-                "%c/%-8s(%5d): ", priChar, entry->tag, entry->pid);
+                "%c/%-8s(%s%5d): ", priChar, entry->tag, uid, entry->pid);
             strcpy(suffixBuf + suffixLen, "\n");
             ++suffixLen;
             break;
diff --git a/liblog/tests/liblog_test.cpp b/liblog/tests/liblog_test.cpp
index 597d8f6..c2bd82d 100644
--- a/liblog/tests/liblog_test.cpp
+++ b/liblog/tests/liblog_test.cpp
@@ -342,8 +342,9 @@
 }
 
 static const char max_payload_tag[] = "TEST_max_payload_XXXX";
-static const char max_payload_buf[LOGGER_ENTRY_MAX_PAYLOAD
-    - sizeof(max_payload_tag) - 1] = "LEONATO\n\
+#define SIZEOF_MAX_PAYLOAD_BUF (LOGGER_ENTRY_MAX_PAYLOAD - \
+                                sizeof(max_payload_tag) - 1)
+static const char max_payload_buf[] = "LEONATO\n\
 I learn in this letter that Don Peter of Arragon\n\
 comes this night to Messina\n\
 MESSENGER\n\
@@ -469,7 +470,7 @@
 trouble: the fashion of the world is to avoid\n\
 cost, and you encounter it\n\
 LEONATO\n\
-Never came trouble to my house in the likeness";
+Never came trouble to my house in the likeness of your grace";
 
 TEST(liblog, max_payload) {
     pid_t pid = getpid();
@@ -528,7 +529,7 @@
 
     EXPECT_EQ(true, matches);
 
-    EXPECT_LE(sizeof(max_payload_buf), static_cast<size_t>(max_len));
+    EXPECT_LE(SIZEOF_MAX_PAYLOAD_BUF, static_cast<size_t>(max_len));
 }
 
 TEST(liblog, too_big_payload) {
@@ -1005,7 +1006,7 @@
     const int TAG = 123456782;
     const char SUBTAG[] = "test-subtag";
     const int UID = -1;
-    const int DATA_LEN = sizeof(max_payload_buf);
+    const int DATA_LEN = SIZEOF_MAX_PAYLOAD_BUF;
     struct logger_list *logger_list;
 
     pid_t pid = getpid();
@@ -1076,8 +1077,8 @@
         }
         eventData += dataLen;
 
-        // 4 bytes for the tag, and 512 bytes for the log since the max_payload_buf should be
-        // truncated.
+        // 4 bytes for the tag, and 512 bytes for the log since the
+        // max_payload_buf should be truncated.
         ASSERT_EQ(4 + 512, eventData - original);
 
         ++count;
diff --git a/logcat/logcat.cpp b/logcat/logcat.cpp
index 059916e..32bfd9c 100644
--- a/logcat/logcat.cpp
+++ b/logcat/logcat.cpp
@@ -265,7 +265,7 @@
                     "  -v <format>     Sets the log print format, where <format> is:\n"
                     "  --format=<format>\n"
                     "                      brief color epoch long monotonic printable process raw\n"
-                    "                      tag thread threadtime time usec UTC year zone\n\n"
+                    "                      tag thread threadtime time uid usec UTC year zone\n\n"
                     "  -D              print dividers between each log buffer\n"
                     "  --dividers\n"
                     "  -c              clear (flush) the entire log and exit\n"
diff --git a/logd/LogBuffer.cpp b/logd/LogBuffer.cpp
index 6770bb7..45b9861 100644
--- a/logd/LogBuffer.cpp
+++ b/logd/LogBuffer.cpp
@@ -846,7 +846,7 @@
         pthread_mutex_unlock(&mLogElementsLock);
 
         // range locking in LastLogTimes looks after us
-        max = element->flushTo(reader, this);
+        max = element->flushTo(reader, this, privileged);
 
         if (max == element->FLUSH_ERROR) {
             return max;
diff --git a/logd/LogBufferElement.cpp b/logd/LogBufferElement.cpp
index c4c302b..e1d367f 100644
--- a/logd/LogBufferElement.cpp
+++ b/logd/LogBufferElement.cpp
@@ -194,21 +194,25 @@
     return retval;
 }
 
-uint64_t LogBufferElement::flushTo(SocketClient *reader, LogBuffer *parent) {
-    struct logger_entry_v3 entry;
+uint64_t LogBufferElement::flushTo(SocketClient *reader, LogBuffer *parent,
+                                   bool privileged) {
+    struct logger_entry_v4 entry;
 
-    memset(&entry, 0, sizeof(struct logger_entry_v3));
+    memset(&entry, 0, sizeof(struct logger_entry_v4));
 
-    entry.hdr_size = sizeof(struct logger_entry_v3);
+    entry.hdr_size = privileged ?
+                         sizeof(struct logger_entry_v4) :
+                         sizeof(struct logger_entry_v3);
     entry.lid = mLogId;
     entry.pid = mPid;
     entry.tid = mTid;
+    entry.uid = mUid;
     entry.sec = mRealTime.tv_sec;
     entry.nsec = mRealTime.tv_nsec;
 
     struct iovec iovec[2];
     iovec[0].iov_base = &entry;
-    iovec[0].iov_len = sizeof(struct logger_entry_v3);
+    iovec[0].iov_len = entry.hdr_size;
 
     char *buffer = NULL;
 
diff --git a/logd/LogBufferElement.h b/logd/LogBufferElement.h
index 09987ea..e7f88b9 100644
--- a/logd/LogBufferElement.h
+++ b/logd/LogBufferElement.h
@@ -80,7 +80,7 @@
     uint32_t getTag(void) const;
 
     static const uint64_t FLUSH_ERROR;
-    uint64_t flushTo(SocketClient *writer, LogBuffer *parent);
+    uint64_t flushTo(SocketClient *writer, LogBuffer *parent, bool privileged);
 };
 
 #endif