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Try to use ulog-helper if utempter does not exist

FreeBSD does not have /usr/libexec/*/utempter.
It does however have /usr/libexec/ulog-helper [1].

It uses login instead of add and logout instead of del.

[1] https://svnweb.freebsd.org/base/head/libexec/ulog-helper/ulog-helper.c?revision=234469&view=markup
[2] https://git.reviewboard.kde.org/r/129122/

diff --git a/cmake/FindUTEMPTER.cmake b/cmake/FindUTEMPTER.cmake
index 4921e58..d3236c8 100644
--- cmake/FindUTEMPTER.cmake
+++ cmake/FindUTEMPTER.cmake
@@ -42,6 +42,16 @@ find_file (UTEMPTER_EXECUTABLE utempter PATHS
     /usr/libexec/utempter
 )

+# On FreeBSD for example we have to use ulog-helper
+if (NOT UTEMPTER_EXECUTABLE)
+    find_program (UTEMPTER_EXECUTABLE ulog-helper PATHS
+        /usr/libexec
+    )
+    if (UTEMPTER_EXECUTABLE)
+        add_definitions(-DUTEMPTER_ULOG=1)
+    endif ()
+endif ()
+
 if (UTEMPTER_EXECUTABLE)
     add_definitions(-DUTEMPTER_PATH=\"${UTEMPTER_EXECUTABLE}\")
 endif ()
diff --git a/src/kpty.cpp b/src/kpty.cpp
index 7bf31c3..11006df 100644
--- src/kpty.cpp
+++ src/kpty.cpp
@@ -74,6 +74,14 @@
 #endif

 #ifdef UTEMPTER_PATH
+// utempter uses 'add' and 'del' whereas ulog-helper uses 'login' and 'logout'
+#  ifndef UTEMPTER_ULOG
+#    define UTEMPTER_ADD "add"
+#    define UTEMPTER_DEL "del"
+#  else
+#    define UTEMPTER_ADD "login"
+#    define UTEMPTER_DEL "logout"
+#  endif
 class UtemptProcess : public QProcess
 {
 public:
@@ -517,7 +525,7 @@ void KPty::login(const char *user, const char *remotehost)
         UtemptProcess utemptProcess;
         utemptProcess.cmdFd = d->masterFd;
         utemptProcess.setProgram(d->utempterPath);
-        utemptProcess.setArguments(QStringList() << QStringLiteral("add") << QString::fromLocal8Bit(remotehost));
+        utemptProcess.setArguments(QStringList() << QStringLiteral(UTEMPTER_ADD) << QString::fromLocal8Bit(remotehost));
         utemptProcess.setProcessChannelMode(QProcess::ForwardedChannels);
         utemptProcess.start();
         utemptProcess.waitForFinished();
@@ -606,7 +614,7 @@ void KPty::logout()
         UtemptProcess utemptProcess;
         utemptProcess.cmdFd = d->masterFd;
         utemptProcess.setProgram(d->utempterPath);
-        utemptProcess.setArguments(QStringList(QStringLiteral("del")));
+        utemptProcess.setArguments(QStringList(QStringLiteral(UTEMPTER_DEL)));
         utemptProcess.setProcessChannelMode(QProcess::ForwardedChannels);
         utemptProcess.start();
         utemptProcess.waitForFinished();
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