From 164df6604c4d2cb3e3441c697e38e94b7ca57db4 Mon Sep 17 00:00:00 2001
From: Ralf Ramsauer <ralf@ramses-pyramidenbau.de>
Date: Thu, 14 May 2015 15:30:55 +0200
Subject: [PATCH] Added proper daemonization

---
 daemon.cpp                | 72 +++++++++++++++++++++++++++++++++++++++
 daemon.h                  | 13 +++++++
 scripts/doorlockd         |  1 +
 scripts/doorlockd-start   | 12 -------
 scripts/doorlockd-stop    | 12 -------
 scripts/doorlockd.service |  4 +--
 6 files changed, 88 insertions(+), 26 deletions(-)
 create mode 100644 daemon.cpp
 create mode 100644 daemon.h
 create mode 100644 scripts/doorlockd
 delete mode 100755 scripts/doorlockd-start
 delete mode 100755 scripts/doorlockd-stop

diff --git a/daemon.cpp b/daemon.cpp
new file mode 100644
index 0000000..9117b93
--- /dev/null
+++ b/daemon.cpp
@@ -0,0 +1,72 @@
+#include <stdexcept>
+#include <cstring>
+#include <fstream>
+
+#include <sys/resource.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "daemon.h"
+
+using namespace std;
+
+void daemonize(const bool daemonize,
+               const string &dir,
+               const string &stdinfile,
+               const string &stdoutfile,
+               const string &stderrfile,
+               const string &pidFile)
+{
+    umask(0);
+
+    rlimit rl;
+    if (getrlimit(RLIMIT_NOFILE, &rl) < 0)
+    {
+        throw runtime_error(strerror(errno));
+    }
+
+    if (daemonize == true)
+    {
+        pid_t pid;
+        if ((pid = fork()) < 0)
+        {
+            throw runtime_error(strerror(errno));
+        } else if (pid != 0) {
+            exit(0);
+        }
+
+        pid = setsid();
+
+        ofstream pidStream;
+        pidStream.exceptions(ofstream::failbit | ofstream::badbit);
+        pidStream.open(pidFile, ofstream::trunc);
+        pidStream << pid << endl;
+    }
+
+    if (!dir.empty() && chdir(dir.c_str()) < 0)
+    {
+        throw runtime_error(strerror(errno));
+    }
+
+    if (rl.rlim_max == RLIM_INFINITY)
+    {
+        rl.rlim_max = 1024;
+    }
+
+    for (unsigned int i = 0; i < rl.rlim_max; i++)
+    {
+        close(i);
+    }
+
+    int fd0 = open(stdinfile.c_str(), O_RDONLY);
+    int fd1 = open(stdoutfile.c_str(),
+      O_WRONLY|O_CREAT|O_APPEND, S_IRUSR|S_IWUSR);
+    int fd2 = open(stderrfile.c_str(),
+      O_WRONLY|O_CREAT|O_APPEND, S_IRUSR|S_IWUSR);
+
+    if (fd0 != STDIN_FILENO || fd1 != STDOUT_FILENO || fd2 != STDERR_FILENO)
+    {
+        throw runtime_error("new standard file descriptors were not opened as expected");
+    }
+}
diff --git a/daemon.h b/daemon.h
new file mode 100644
index 0000000..ba7e3b5
--- /dev/null
+++ b/daemon.h
@@ -0,0 +1,13 @@
+#ifndef DAEMON_H
+#define DAEMON_H
+
+#include <string>
+
+void daemonize(const bool daemonize,
+               const std::string &dir,
+               const std::string &stdinfile,
+               const std::string &stdoutfile,
+               const std::string &stderrfile,
+               const std::string &pidFile);
+
+#endif
diff --git a/scripts/doorlockd b/scripts/doorlockd
new file mode 100644
index 0000000..cda6141
--- /dev/null
+++ b/scripts/doorlockd
@@ -0,0 +1 @@
+LDAPTLS_REQCERT=never
diff --git a/scripts/doorlockd-start b/scripts/doorlockd-start
deleted file mode 100755
index 5af044b..0000000
--- a/scripts/doorlockd-start
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/bash
-PIDFILE=/tmp/doorlockd-pid
-
-gpio load spi
-gpio load i2c
-
-/home/ralf/doorlockd-build/doorlockd &
-PID=$!
-
-echo $PID > $PIDFILE
-
-wait $PID
diff --git a/scripts/doorlockd-stop b/scripts/doorlockd-stop
deleted file mode 100755
index 31a6608..0000000
--- a/scripts/doorlockd-stop
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/bash
-
-PIDFILE=/tmp/doorlockd-pid
-
-if [ -f $PIDFILE ]
-then
-    kill `cat $PIDFILE`
-    rm $PIDFILE
-else
-    echo "PID file not existent"
-fi
-
diff --git a/scripts/doorlockd.service b/scripts/doorlockd.service
index f83ed44..d505e78 100644
--- a/scripts/doorlockd.service
+++ b/scripts/doorlockd.service
@@ -5,8 +5,8 @@ After=network.target
 [Service]
 User=root
 Group=root
-ExecStart=/usr/local/share/doorlockd/doorlockd-start
-ExecStop=/usr/local/share/doorlockd/doorlockd-stop
+EnvironmentFile=-/etc/sysconfig/doorlockd
+ExecStart=/usr/local/sbin/doorlockd -f
 
 [Install]
 WantedBy=multi-user.target