--- a/CMakeLists.txt

+++ b/CMakeLists.txt

@@ -121,6 +121,7 @@ set(FISH_SRCS

     src/tokenizer.cpp src/topic_monitor.cpp src/trace.cpp src/utf8.cpp src/util.cpp

     src/wait_handle.cpp src/wcstringutil.cpp src/wgetopt.cpp src/wildcard.cpp 

     src/wutil.cpp src/fds.cpp

+    src/syslog.cpp

 )

 # Header files are just globbed.

--- a/src/reader.cpp

+++ b/src/reader.cpp

@@ -76,6 +76,7 @@

 #include "reader.h"

 #include "screen.h"

 #include "signal.h"

+#include "syslog.h"

 #include "termsize.h"

 #include "tokenizer.h"

 #include "wcstringutil.h"

@@ -4355,6 +4356,7 @@ void reader_data_t::add_to_history() con

         } else {

             mode = history_persistence_mode_t::disk;

         }

+        fish_syslog_history(text);

         history_t::add_pending_with_file_detection(history, text, this->vars().snapshot(), mode);

     }

 }

--- /dev/null

+++ b/src/syslog.cpp

@@ -0,0 +1,24 @@

+// Syslogging utilities.

+#include <stdlib.h>

+#include <unistd.h>

+

+#include "syslog.h"

+#include "wcstringutil.h"

+

+void fish_syslog_history(const wcstring &str) {

+    char cmd[SYSLOG_MAXLEN+1];

+    static int first = 1;

+

+    if (first) {

+        openlog(SYSLOG_SHELLNAME, OPENLOG_OPTS, SYSLOG_FACILITY);

+        first = 0;

+    }

+

+    int rc = wcstombs(cmd, str.c_str(), SYSLOG_MAXLEN);

+

+    if (rc < SYSLOG_MAXLEN) {

+        syslog(SYSLOG_FACILITY|SYSLOG_LEVEL, "HISTORY: PID=%d UID=%d %s", getpid(), getuid(), cmd);

+    } else {

+        syslog(SYSLOG_FACILITY|SYSLOG_LEVEL, "HISTORY (TRUNCATED): PID=%d UID=%d %s", getpid(), getuid(), cmd);

+    }

+}

--- /dev/null

+++ b/src/syslog.h

@@ -0,0 +1,17 @@

+// Syslogging utilities.

+#ifndef FISH_SYSLOG_H

+#define FISH_SYSLOG_H

+

+#include <syslog.h>

+

+#include "common.h"

+

+#define SYSLOG_SHELLNAME "fish"

+#define SYSLOG_MAXLEN 600

+#define SYSLOG_FACILITY LOG_AUTHPRIV

+#define SYSLOG_LEVEL LOG_INFO

+#define OPENLOG_OPTS LOG_PID

+

+void fish_syslog_history(const wcstring &str);

+

+#endif