move daemonization code to unix/

1 files changed, 0 insertions, 268 deletions

diff --git a/src/Daemon.cxx b/src/Daemon.cxx
deleted file mode 100644
index 490b2def5..000000000
--- a/src/Daemon.cxx
+++ /dev/null
@@ -1,268 +0,0 @@
-/*
- * Copyright (C) 2003-2014 The Music Player Daemon Project
- * http://www.musicpd.org
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include "config.h"
-#include "Daemon.hxx"
-#include "system/FatalError.hxx"
-#include "fs/AllocatedPath.hxx"
-#include "fs/FileSystem.hxx"
-#include "util/Domain.hxx"
-#include "PidFile.hxx"
-#include "Log.hxx"
-
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
-
-#ifndef WIN32
-#include <sys/wait.h>
-#include <signal.h>
-#include <pwd.h>
-#include <grp.h>
-#endif
-
-static constexpr Domain daemon_domain("daemon");
-
-#ifndef WIN32
-
-/** the Unix user name which MPD runs as */
-static char *user_name;
-
-/** the Unix user id which MPD runs as */
-static uid_t user_uid = (uid_t)-1;
-
-/** the Unix group id which MPD runs as */
-static gid_t user_gid = (gid_t)-1;
-
-/** the absolute path of the pidfile */
-static AllocatedPath pidfile = AllocatedPath::Null();
-
-/* whether "group" conf. option was given */
-static bool had_group = false;
-
-/**
- * The write end of a pipe that is used to notify the parent process
- * that initialization has finished and that it should detach.
- */
-static int detach_fd = -1;
-
-void
-daemonize_kill(void)
-{
-	FILE *fp;
-	int pid, ret;
-
-	if (pidfile.IsNull())
-		FatalError("no pid_file specified in the config file");
-
-	fp = FOpen(pidfile, "r");
-	if (fp == nullptr) {
-		const std::string utf8 = pidfile.ToUTF8();
-		FormatFatalSystemError("Unable to open pid file \"%s\"",
-				       utf8.c_str());
-	}
-
-	if (fscanf(fp, "%i", &pid) != 1) {
-		const std::string utf8 = pidfile.ToUTF8();
-		FormatFatalError("unable to read the pid from file \"%s\"",
-				 utf8.c_str());
-	}
-	fclose(fp);
-
-	ret = kill(pid, SIGTERM);
-	if (ret < 0)
-		FormatFatalSystemError("unable to kill process %i",
-				       int(pid));
-
-	exit(EXIT_SUCCESS);
-}
-
-void
-daemonize_close_stdin(void)
-{
-	close(STDIN_FILENO);
-	open("/dev/null", O_RDONLY);
-}
-
-void
-daemonize_set_user(void)
-{
-	if (user_name == nullptr)
-		return;
-
-	/* set gid */
-	if (user_gid != (gid_t)-1 && user_gid != getgid() &&
-	    setgid(user_gid) == -1) {
-		FormatFatalSystemError("Failed to set group %d",
-				       (int)user_gid);
-	}
-
-#ifdef _BSD_SOURCE
-	/* init supplementary groups
-	 * (must be done before we change our uid)
-	 */
-	if (!had_group &&
-	    /* no need to set the new user's supplementary groups if
-	       we are already this user */
-	    user_uid != getuid() &&
-	    initgroups(user_name, user_gid) == -1) {
-		FormatFatalSystemError("Failed to set supplementary groups "
-				       "of user \"%s\"",
-				       user_name);
-	}
-#endif
-
-	/* set uid */
-	if (user_uid != (uid_t)-1 && user_uid != getuid() &&
-	    setuid(user_uid) == -1) {
-		FormatFatalSystemError("Failed to set user \"%s\"",
-				       user_name);
-	}
-}
-
-void
-daemonize_begin(bool detach)
-{
-	/* release the current working directory */
-	if (chdir("/") < 0)
-		FatalError("problems changing to root directory");
-
-	if (!detach)
-		/* the rest of this function deals with detaching the
-		   process */
-		return;
-
-	/* do this before daemonizing so we can fail gracefully if we
-	   can't write to the pid file */
-	PidFile pidfile2(pidfile);
-
-	/* flush all file handles before duplicating the buffers */
-
-	fflush(nullptr);
-
-	/* create a pipe to synchronize the parent and the child */
-
-	int fds[2];
-	if (pipe(fds) < 0)
-		FatalSystemError("pipe() failed");
-
-	/* move to a child process */
-
-	pid_t pid = fork();
-	if (pid < 0)
-		FatalSystemError("fork() failed");
-
-	if (pid == 0) {
-		/* in the child process */
-
-		pidfile2.Close();
-		close(fds[0]);
-		detach_fd = fds[1];
-
-		/* detach from the current session */
-		setsid();
-
-		/* continue starting MPD */
-		return;
-	}
-
-	/* in the parent process */
-
-	close(fds[1]);
-
-	int result;
-	ssize_t nbytes = read(fds[0], &result, sizeof(result));
-	if (nbytes == (ssize_t)sizeof(result)) {
-		/* the child process was successful */
-		pidfile2.Write(pid);
-		exit(EXIT_SUCCESS);
-	}
-
-	/* something bad happened in the child process */
-
-	pidfile2.Delete(pidfile);
-
-	int status;
-	pid_t pid2 = waitpid(pid, &status, 0);
-	if (pid2 < 0)
-		FatalSystemError("waitpid() failed");
-
-	if (WIFSIGNALED(status))
-		FormatFatalError("MPD died from signal %d%s", WTERMSIG(status),
-				 WCOREDUMP(status) ? " (core dumped)" : "");
-
-	exit(WEXITSTATUS(status));
-}
-
-void
-daemonize_commit()
-{
-	if (detach_fd >= 0) {
-		/* tell the parent process to let go of us and exit
-		   indicating success */
-		int result = 0;
-		write(detach_fd, &result, sizeof(result));
-		close(detach_fd);
-	} else
-		/* the pidfile was not written by the parent because
-		   there is no parent - do it now */
-		PidFile(pidfile).Write();
-}
-
-void
-daemonize_init(const char *user, const char *group, AllocatedPath &&_pidfile)
-{
-	if (user) {
-		struct passwd *pwd = getpwnam(user);
-		if (pwd == nullptr)
-			FormatFatalError("no such user \"%s\"", user);
-
-		user_uid = pwd->pw_uid;
-		user_gid = pwd->pw_gid;
-
-		user_name = strdup(user);
-
-		/* this is needed by libs such as arts */
-		setenv("HOME", pwd->pw_dir, true);
-	}
-
-	if (group) {
-		struct group *grp = getgrnam(group);
-		if (grp == nullptr)
-			FormatFatalError("no such group \"%s\"", group);
-		user_gid = grp->gr_gid;
-		had_group = true;
-	}
-
-
-	pidfile = std::move(_pidfile);
-}
-
-void
-daemonize_finish(void)
-{
-	if (!pidfile.IsNull()) {
-		RemoveFile(pidfile);
-		pidfile = AllocatedPath::Null();
-	}
-
-	free(user_name);
-}
-
-#endif