launch_daemon: Initialize /tmp & /var/shared_memory, clock.

* Added initializing /tmp & /var/shared_memory to the launch_daemon.
* Moved clockconfig.cpp code into the launch_daemon.
* This follows systemd design; since those jobs are fixed, it doesn't
  matter where you maintain them.
* The init jobs are BJobs, but the JobQueue is only used for that
  one use for now. At a later time, I intend to put the job launching
  in there, as well. BJob allows to represent the dependencies already.

build/jam/images/definitions/minimum

@@ -3,8 +3,7 @@
 SYSTEM_BIN = [ FFilterByBuildFeatures
 	addattr alert arp
 	bc beep bfsinfo
-	catattr checkfs checkitout chop clear
-	clockconfig cmp collectcatkeys compress copyattr
+	catattr checkfs checkitout chop clear cmp collectcatkeys compress copyattr
 	dc desklink df diff diff3 diskimage draggers
 	driveinfo dstcheck dumpcatalog
 	eject error

src/bin/Jamfile

@@ -81,7 +81,6 @@ StdBinCommands
 	catattr.cpp
 	checkfs.cpp
 	clipboard.cpp
-	clockconfig.cpp
 	df.cpp
 	diskimage.cpp
 	dpms.cpp

src/servers/launch/AbstractEmptyDirectoryJob.cpp

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2015, Axel Dörfler, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include "AbstractEmptyDirectoryJob.h"
+
+#include <stdio.h>
+
+#include <Directory.h>
+#include <Entry.h>
+
+
+AbstractEmptyDirectoryJob::AbstractEmptyDirectoryJob(const BString& name)
+	:
+	BJob(name)
+{
+}
+
+
+status_t
+AbstractEmptyDirectoryJob::CreateAndEmpty(const char* path) const
+{
+	BEntry entry(path);
+	if (entry.InitCheck() != B_OK) {
+		create_directory(path, 0777);
+
+		status_t status = entry.SetTo(path);
+		if (status != B_OK) {
+			fprintf(stderr, "Cannot create directory \"%s\": %s\n", path,
+				strerror(status));
+			return status;
+		}
+	}
+
+	return _EmptyDirectory(entry, false);
+}
+
+
+status_t
+AbstractEmptyDirectoryJob::_EmptyDirectory(BEntry& directoryEntry,
+	bool remove) const
+{
+	BDirectory directory(&directoryEntry);
+	BEntry entry;
+	while (directory.GetNextEntry(&entry) == B_OK) {
+		if (entry.IsDirectory())
+			_EmptyDirectory(entry, true);
+		else
+			entry.Remove();
+	}
+
+	return remove ? directoryEntry.Remove() : B_OK;
+}

src/servers/launch/AbstractEmptyDirectoryJob.h

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2015, Axel Dörfler, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef ABSTRACT_EMPTY_DIRECTORY_JOB_H
+#define ABSTRACT_EMPTY_DIRECTORY_JOB_H
+
+
+#include <Job.h>
+
+
+class BEntry;
+
+
+class AbstractEmptyDirectoryJob : public BSupportKit::BJob {
+public:
+								AbstractEmptyDirectoryJob(const BString& name);
+
+protected:
+			status_t			CreateAndEmpty(const char* path) const;
+
+private:
+			status_t			_EmptyDirectory(BEntry& directoryEntry,
+									bool remove) const;
+};
+
+
+#endif // ABSTRACT_EMPTY_DIRECTORY_JOB_H

src/servers/launch/InitRealTimeClockJob.cpp

@@ -1,43 +1,64 @@
 /*
+ * Copyright 2015, Axel Dörfler, axeld@pinc-software.de.
  * Copyright 2004, Jérôme Duval, jerome.duval@free.fr.
  * Copyright 2010, 2012, Oliver Tappe <zooey@hirschkaefer.de>
- * All rights reserved. Distributed under the terms of the MIT License.
+ * Distributed under the terms of the MIT License.
  */
 
 
+//! Initialize real time clock, and time zone offset
+
+
+#include "InitRealTimeClockJob.h"
+
+#include <stdio.h>
+
 #include <File.h>
 #include <FindDirectory.h>
 #include <Message.h>
-#include <OS.h>
-#include <Path.h>
-#include <String.h>
 #include <TimeZone.h>
 
 #include <syscalls.h>
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+
+using BSupportKit::BJob;
 
 
-static char* program;
+InitRealTimeClockJob::InitRealTimeClockJob()
+	:
+	BJob("init real time clock")
+{
+}
+
+
+status_t
+InitRealTimeClockJob::Execute()
+{
+	BPath path;
+	status_t status = find_directory(B_USER_SETTINGS_DIRECTORY, &path);
+	if (status == B_OK) {
+		_SetRealTimeClockIsGMT(path);
+		_SetTimeZoneOffset(path);
+	}
+	return status;
+}
 
 
 void
-setRealTimeClockIsGMT(BPath path)
+InitRealTimeClockJob::_SetRealTimeClockIsGMT(BPath path) const
 {
 	path.Append("RTC_time_settings");
 	BFile file;
 	status_t status = file.SetTo(path.Path(), B_READ_ONLY);
 	if (status != B_OK) {
-		fprintf(stderr, "%s: can't open RTC settings file\n", program);
+		fprintf(stderr, "Can't open RTC settings file\n");
 		return;
 	}
 
 	char buffer[10];
 	ssize_t bytesRead = file.Read(buffer, sizeof(buffer));
 	if (bytesRead < 0) {
-		fprintf(stderr, "%s: unable to read RTC settings file\n", program);
+		fprintf(stderr, "Unable to read RTC settings file\n");
 		return;
 	}
 	bool isGMT = strncmp(buffer, "local", 5) != 0;
@@ -48,25 +69,25 @@ setRealTimeClockIsGMT(BPath path)
 
 
 void
-setTimeZoneOffset(BPath path)
+InitRealTimeClockJob::_SetTimeZoneOffset(BPath path) const
 {
 	path.Append("Time settings");
 	BFile file;
 	status_t status = file.SetTo(path.Path(), B_READ_ONLY);
 	if (status != B_OK) {
-		fprintf(stderr, "%s: can't open Time settings file\n", program);
+		fprintf(stderr, "Can't open Time settings file\n");
 		return;
 	}
 
 	BMessage settings;
 	status = settings.Unflatten(&file);
 	if (status != B_OK) {
-		fprintf(stderr, "%s: unable to parse Time settings file\n", program);
+		fprintf(stderr, "Unable to parse Time settings file\n");
 		return;
 	}
 	BString timeZoneID;
 	if (settings.FindString("timezone", &timeZoneID) != B_OK) {
-		fprintf(stderr, "%s: no timezone found\n", program);
+		fprintf(stderr, "No timezone found\n");
 		return;
 	}
 	int32 timeZoneOffset = BTimeZone(timeZoneID.String()).OffsetFromGMT();
@@ -76,22 +97,3 @@ setTimeZoneOffset(BPath path)
 	printf("timezone is %s, offset is %" B_PRId32 " seconds from GMT.\n",
 		timeZoneID.String(), timeZoneOffset);
 }
-
-
-int
-main(int argc, char **argv)
-{
-	program = argv[0];
-
-	BPath path;
-	status_t status = find_directory(B_USER_SETTINGS_DIRECTORY, &path);
-	if (status != B_OK) {
-		fprintf(stderr, "%s: can't find settings directory\n", program);
-		return EXIT_FAILURE;
-	}
-
-	setRealTimeClockIsGMT(path);
-	setTimeZoneOffset(path);
-
-	return 0;
-}

src/servers/launch/InitRealTimeClockJob.h

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2015, Axel Dörfler, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef INIT_REAL_TIME_CLOCK_JOB_H
+#define INIT_REAL_TIME_CLOCK_JOB_H
+
+
+#include <Job.h>
+#include <Path.h>
+
+
+class InitRealTimeClockJob : public BSupportKit::BJob {
+public:
+								InitRealTimeClockJob();
+
+protected:
+	virtual	status_t			Execute();
+
+private:
+			void				_SetRealTimeClockIsGMT(BPath path) const;
+			void				_SetTimeZoneOffset(BPath path) const;
+};
+
+
+#endif // INIT_REAL_TIME_CLOCK_JOB_H

src/servers/launch/InitSharedMemoryDirectoryJob.cpp

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2015, Axel Dörfler, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+
+
+//! Empty main temporary directory
+
+
+#include "InitSharedMemoryDirectoryJob.h"
+
+
+InitSharedMemoryDirectoryJob::InitSharedMemoryDirectoryJob()
+	:
+	AbstractEmptyDirectoryJob("init /var/shared_memory")
+{
+}
+
+
+status_t
+InitSharedMemoryDirectoryJob::Execute()
+{
+	return CreateAndEmpty("/var/shared_memory");
+}

src/servers/launch/InitSharedMemoryDirectoryJob.h

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2015, Axel Dörfler, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef INIT_SHARED_MEMORY_DIRECTORY_JOB_H
+#define INIT_SHARED_MEMORY_DIRECTORY_JOB_H
+
+
+#include "AbstractEmptyDirectoryJob.h"
+
+
+class InitSharedMemoryDirectoryJob : public AbstractEmptyDirectoryJob {
+public:
+								InitSharedMemoryDirectoryJob();
+
+protected:
+	virtual	status_t			Execute();
+};
+
+
+#endif // INIT_SHARED_MEMORY_DIRECTORY_JOB_H

src/servers/launch/InitTemporaryDirectoryJob.cpp

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2015, Axel Dörfler, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+
+
+//! Empty main temporary directory
+
+
+#include "InitTemporaryDirectoryJob.h"
+
+#include <FindDirectory.h>
+#include <Path.h>
+
+
+InitTemporaryDirectoryJob::InitTemporaryDirectoryJob()
+	:
+	AbstractEmptyDirectoryJob("init /tmp")
+{
+}
+
+
+status_t
+InitTemporaryDirectoryJob::Execute()
+{
+	// TODO: the /tmp entries could be scanned synchronously, and deleted
+	// later
+	BPath path;
+	status_t status = find_directory(B_SYSTEM_TEMP_DIRECTORY, &path, true);
+	if (status == B_OK)
+		return CreateAndEmpty(path.Path());
+
+	return status;
+}

src/servers/launch/InitTemporaryDirectoryJob.h

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2015, Axel Dörfler, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef INIT_TEMPORARY_DIRECTORY_JOB_H
+#define INIT_TEMPORARY_DIRECTORY_JOB_H
+
+
+#include "AbstractEmptyDirectoryJob.h"
+
+
+class InitTemporaryDirectoryJob : public AbstractEmptyDirectoryJob {
+public:
+								InitTemporaryDirectoryJob();
+
+protected:
+	virtual	status_t			Execute();
+};
+
+
+#endif // INIT_TEMPORARY_DIRECTORY_JOB_H

src/servers/launch/Jamfile

@@ -1,11 +1,17 @@
 SubDir HAIKU_TOP src servers launch ;
 
-UsePrivateHeaders app shared ;
+UsePrivateHeaders app package shared storage support ;
 UsePrivateSystemHeaders ;
 
 Server launch_daemon
 	:
 	LaunchDaemon.cpp
+
+	# init jobs
+	AbstractEmptyDirectoryJob.cpp
+	InitRealTimeClockJob.cpp
+	InitSharedMemoryDirectoryJob.cpp
+	InitTemporaryDirectoryJob.cpp
 	:
 	be libshared.a [ TargetLibstdc++ ]
 	:

src/servers/launch/LaunchDaemon.cpp

@@ -13,6 +13,7 @@
 #include <Directory.h>
 #include <driver_settings.h>
 #include <Entry.h>
+#include <File.h>
 #include <ObjectList.h>
 #include <Path.h>
 #include <PathFinder.h>
@@ -20,11 +21,18 @@
 
 #include <AppMisc.h>
 #include <DriverSettingsMessageAdapter.h>
+#include <JobQueue.h>
 #include <LaunchDaemonDefs.h>
 #include <syscalls.h>
 
+#include "InitRealTimeClockJob.h"
+#include "InitSharedMemoryDirectoryJob.h"
+#include "InitTemporaryDirectoryJob.h"
+
 
 using namespace BPrivate;
+using namespace BSupportKit;
+using BSupportKit::BPrivate::JobQueue;
 
 
 static const char* kLaunchDirectory = "launch";
@@ -127,11 +135,16 @@ private:
 			void				_InitJobs();
 			void				_LaunchJobs();
 
+			void				_RetrieveKernelOptions();
 			void				_SetupEnvironment();
+			void				_InitSystem();
+
 			bool				_IsSafeMode() const;
 
 private:
 			JobMap				fJobs;
+			JobQueue			fJobQueue;
+			bool				fSafeMode;
 };
 
 
@@ -410,7 +423,9 @@ LaunchDaemon::~LaunchDaemon()
 void
 LaunchDaemon::ReadyToRun()
 {
+	_RetrieveKernelOptions();
 	_SetupEnvironment();
+	_InitSystem();
 
 	BStringList paths;
 	BPathFinder::FindPaths(B_FIND_PATH_DATA_DIRECTORY, kLaunchDirectory,
@@ -609,29 +624,52 @@ LaunchDaemon::_LaunchJobs()
 
 
 void
-LaunchDaemon::_SetupEnvironment()
-{
-	// Determine safemode kernel option
-	BString safemode = "SAFEMODE=";
-	safemode << _IsSafeMode() ? "yes" : "no";
-}
-
-
-bool
-LaunchDaemon::_IsSafeMode() const
+LaunchDaemon::_RetrieveKernelOptions()
 {
 	char buffer[32];
 	size_t size = sizeof(buffer);
 	status_t status = _kern_get_safemode_option(B_SAFEMODE_SAFE_MODE, buffer,
 		&size);
 	if (status == B_OK) {
-		return !strncasecmp(buffer, "true", size)
+		fSafeMode = !strncasecmp(buffer, "true", size)
 			|| !strncasecmp(buffer, "yes", size)
 			|| !strncasecmp(buffer, "on", size)
 			|| !strncasecmp(buffer, "enabled", size);
-	}
+	} else
+		fSafeMode = false;
+}
 
-	return false;
+
+void
+LaunchDaemon::_SetupEnvironment()
+{
+	// Determine safemode kernel option
+	BString safemode = "SAFEMODE=";
+	safemode << _IsSafeMode() ? "yes" : "no";
+
+	putenv(safemode.String());
+}
+
+
+/*!	Basic system initialization that must happen before any jobs are launched.
+*/
+void
+LaunchDaemon::_InitSystem()
+{
+	fJobQueue.AddJob(new InitRealTimeClockJob());
+	fJobQueue.AddJob(new InitSharedMemoryDirectoryJob());
+	fJobQueue.AddJob(new InitTemporaryDirectoryJob());
+
+	// TODO: these should be done in parallel
+	while (BJob* job = fJobQueue.Pop())
+		job->Run();
+}
+
+
+bool
+LaunchDaemon::_IsSafeMode() const
+{
+	return fSafeMode;
 }
 
 
@@ -647,6 +685,7 @@ main()
 	if (fd != STDOUT_FILENO)
 		dup2(fd, STDOUT_FILENO);
 	puts("launch_daemon is alive and kicking.");
+	fflush(stdout);
 
 	status_t status;
 	LaunchDaemon* daemon = new LaunchDaemon(status);