repos/Spectre2/Spectre2.cpp

// Spectre 2
//
// Douglas Thrift
//
// $Id$

#include "Mounter.hpp"
#include "Unmounter.hpp"

#include <menes-api/exename.hpp>
#include <menes-app/simple.hpp>

#include <sys/types.h>
#include <signal.h>

int Main(const app::Options& options)
{
        api::Path config(Spectre2::prefix + "/etc/spectre.xml");
        enum Mode { none, pid = 1, fork } mode(none);

        _foreach (const app::ArgumentList, arg, app::GetArguments())
        {
                Matcher matcher;

                if (*arg == matcher("^-config=(.*)$"))
                        config = matcher[1];
                else if (*arg == "-pid")
                        mode = pid;
                else if (*arg == "-fork")
                        mode = fork;
                else if (*arg == "-D")
                        Spectre2::debug = true;
                else
                {
                        api::Cerr << "Usage: " << Spectre2::program << " [-config=config] [-pid|-fork] [-D]" << ios::NewLine;

                        return 1;
                }
        }

        if (!config.Exists())
        {
                api::Cerr << Spectre2::program << ": configuration file " << config.GetPath() << " does not exist." << ios::NewLine;

                return 2;
        }

        switch (mode)
        {
        case pid:
                try
                {
                        _H<xml::Document> document(xml::Parse(config.GetPath()));
                        api::FileReader in(*document/"spectre"/"pid");

                        ios::ReadToWrite(in, api::Cout);
                }
                catch (const api::Error&)
                {
                        return 1;
                }
                break;
        case fork:
                if (api::Posix::CheckError(::fork()))
                        return 0;
        default:
                {
                        Spectre2 spectre(config);
                }
        }

        return 0;
}

extern "C"
{
        void reload(int signal, ::siginfo_t* info, void* uap);
        void stop(int signal, ::siginfo_t* info, void* uap);
}

Spectre2::Spectre2(const api::Path& config)
{
        {
                _H<xml::Document> document(xml::Parse(config.GetPath()));
                _H<xml::Node> spectre(*document/"spectre");

                pid = *spectre/"pid";
                
                if (!(*spectre/"prefix").IsEmpty())
                        prefix = *spectre/"prefix";

                if (!(*spectre/"root").IsEmpty())
                        root = *spectre/"root";

                if (!(*spectre/"mount").IsEmpty())
                        mount = *spectre/"mount";
        }

        {
                api::FileWriter out(pid);
                ios::FormatWriter fout(out);

                fout << ::getpid() << ios::NewLine;
        }

        Daemon daemon_(config);

        daemon = &daemon_;

        {
                struct ::sigaction action;

                action.sa_sigaction = reload;
                action.sa_flags = SA_SIGINFO;

                api::Posix::CheckError(::sigemptyset(&action.sa_mask));
                api::Posix::CheckError(::sigaction(SIGUSR1, &action, NULL));

                action.sa_sigaction = stop;

                api::Posix::CheckError(::sigaction(SIGINT, &action, NULL));
                api::Posix::CheckError(::sigaction(SIGTERM, &action, NULL));
        }
}

Spectre2::~Spectre2()
{
        api::Posix::CheckError(::unlink(pid.NullTerminate()));
}

ext::String Spectre2::program(api::GetExecutablePath().GetName()), Spectre2::prefix(_Spectre2_prefix_), Spectre2::root(_Spectre2_root_), Spectre2::mount(_Spectre2_mount_);
bool Spectre2::debug(false);
Daemon* Spectre2::daemon;

extern "C"
{
        void reload(int signal, ::siginfo_t* info, void* uap)
        {
                Spectre2::daemon->reload();
        }

        void stop(int signal, ::siginfo_t* info, void* uap)
        {
                Spectre2::daemon->stop();
        }
}
Revision:	429
Committed:	2005-03-25T18:47:25-08:00 (20 years, 2 months ago) by douglas
File size:	2870 byte(s)
Log Message:	Refactorizeify! Brought to you by ideas in the shower and riding home in my brother's 4Runner.
#	User	Rev	Content
1	douglas	402	// Spectre 2
2			//
3			// Douglas Thrift
4			//
5			// $Id$
6
7			#include "Mounter.hpp"
8			#include "Unmounter.hpp"
9
10			#include <menes-api/exename.hpp>
11	douglas	417	#include <menes-app/simple.hpp>
12	douglas	402
13			#include <sys/types.h>
14	douglas	405	#include <signal.h>
15	douglas	402
16	douglas	417	int Main(const app::Options& options)
17	douglas	402	{
18	douglas	418	api::Path config(Spectre2::prefix + "/etc/spectre.xml");
19	douglas	428	enum Mode { none, pid = 1, fork } mode(none);
20	douglas	417
21			_foreach (const app::ArgumentList, arg, app::GetArguments())
22	douglas	402	{
23	douglas	417	Matcher matcher;
24	douglas	402
25	douglas	417	if (arg == matcher("^-config=(.)$"))
26			config = matcher[1];
27	douglas	428	else if (*arg == "-pid")
28			mode = pid;
29	douglas	417	else if (*arg == "-fork")
30	douglas	428	mode = fork;
31	douglas	417	else if (*arg == "-D")
32			Spectre2::debug = true;
33			else
34	douglas	402	{
35	douglas	428	api::Cerr << "Usage: " << Spectre2::program << " [-config=config] [-pid\|-fork] [-D]" << ios::NewLine;
36	douglas	402
37	douglas	417	return 1;
38	douglas	402	}
39	douglas	417	}
40	douglas	402
41	douglas	418	if (!config.Exists())
42			{
43			api::Cerr << Spectre2::program << ": configuration file " << config.GetPath() << " does not exist." << ios::NewLine;
44
45			return 2;
46			}
47
48	douglas	428	switch (mode)
49			{
50			case pid:
51			try
52			{
53			_H<xml::Document> document(xml::Parse(config.GetPath()));
54			api::FileReader in(*document/"spectre"/"pid");
55	douglas	402
56	douglas	428	ios::ReadToWrite(in, api::Cout);
57			}
58			catch (const api::Error&)
59			{
60			return 1;
61			}
62			break;
63			case fork:
64			if (api::Posix::CheckError(::fork()))
65			return 0;
66			default:
67			{
68			Spectre2 spectre(config);
69			}
70			}
71	douglas	417
72			return 0;
73			}
74
75	douglas	405	extern "C"
76			{
77			void reload(int signal, ::siginfo_t* info, void* uap);
78			void stop(int signal, ::siginfo_t* info, void* uap);
79			}
80
81	douglas	418	Spectre2::Spectre2(const api::Path& config)
82	douglas	402	{
83			{
84	douglas	418	_H<xml::Document> document(xml::Parse(config.GetPath()));
85	douglas	428	_H<xml::Node> spectre(*document/"spectre");
86	douglas	418
87	douglas	428	pid = *spectre/"pid";
88
89			if (!(*spectre/"prefix").IsEmpty())
90			prefix = *spectre/"prefix";
91
92			if (!(*spectre/"root").IsEmpty())
93			root = *spectre/"root";
94
95			if (!(*spectre/"mount").IsEmpty())
96			mount = *spectre/"mount";
97	douglas	418	}
98
99			{
100	douglas	402	api::FileWriter out(pid);
101			ios::FormatWriter fout(out);
102
103			fout << ::getpid() << ios::NewLine;
104			}
105
106	douglas	429	Daemon daemon_(config);
107	douglas	405
108	douglas	429	daemon = &daemon_;
109	douglas	405
110			{
111			struct ::sigaction action;
112
113			action.sa_sigaction = reload;
114			action.sa_flags = SA_SIGINFO;
115
116			api::Posix::CheckError(::sigemptyset(&action.sa_mask));
117	douglas	415	api::Posix::CheckError(::sigaction(SIGUSR1, &action, NULL));
118	douglas	405
119			action.sa_sigaction = stop;
120
121	douglas	428	api::Posix::CheckError(::sigaction(SIGINT, &action, NULL));
122	douglas	405	api::Posix::CheckError(::sigaction(SIGTERM, &action, NULL));
123			}
124	douglas	402	}
125
126			Spectre2::~Spectre2()
127			{
128			api::Posix::CheckError(::unlink(pid.NullTerminate()));
129			}
130
131	douglas	428	ext::String Spectre2::program(api::GetExecutablePath().GetName()), Spectre2::prefix(_Spectre2_prefix_), Spectre2::root(_Spectre2_root_), Spectre2::mount(_Spectre2_mount_);
132	douglas	402	bool Spectre2::debug(false);
133	douglas	429	Daemon* Spectre2::daemon;
134	douglas	405
135			extern "C"
136			{
137			void reload(int signal, ::siginfo_t* info, void* uap)
138			{
139	douglas	429	Spectre2::daemon->reload();
140	douglas	405	}
141
142			void stop(int signal, ::siginfo_t* info, void* uap)
143			{
144	douglas	429	Spectre2::daemon->stop();
145	douglas	405	}
146			}