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Diffstat (limited to 'src/Daemon.cxx')
-rw-r--r-- | src/Daemon.cxx | 247 |
1 files changed, 0 insertions, 247 deletions
diff --git a/src/Daemon.cxx b/src/Daemon.cxx deleted file mode 100644 index 557c47777..000000000 --- a/src/Daemon.cxx +++ /dev/null @@ -1,247 +0,0 @@ -/* - * Copyright (C) 2003-2013 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 "Log.hxx" - -#include <glib.h> - -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <string.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> - -#ifndef WIN32 -#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; - - -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); - } -} - -static void -daemonize_detach(void) -{ - /* flush all file handles before duplicating the buffers */ - - fflush(nullptr); - -#ifdef HAVE_DAEMON - - if (daemon(0, 1)) - FatalSystemError("daemon() failed"); - -#elif defined(HAVE_FORK) - - /* detach from parent process */ - - switch (fork()) { - case -1: - FatalSystemError("fork() failed"); - case 0: - break; - default: - /* exit the parent process */ - _exit(EXIT_SUCCESS); - } - - /* release the current working directory */ - - if (chdir("/") < 0) - FatalError("problems changing to root directory"); - - /* detach from the current session */ - - setsid(); - -#else - FatalError("no support for daemonizing"); -#endif - - LogDebug(daemon_domain, "daemonized"); -} - -void -daemonize(bool detach) -{ - FILE *fp = nullptr; - - if (!pidfile.IsNull()) { - /* do this before daemon'izing so we can fail gracefully if we can't - * write to the pid file */ - LogDebug(daemon_domain, "opening pid file"); - fp = FOpen(pidfile, "w+"); - if (!fp) { - const std::string utf8 = pidfile.ToUTF8(); - FormatFatalSystemError("Failed to create pid file \"%s\"", - pidfile.c_str()); - } - } - - if (detach) - daemonize_detach(); - - if (!pidfile.IsNull()) { - LogDebug(daemon_domain, "writing pid file"); - fprintf(fp, "%lu\n", (unsigned long)getpid()); - fclose(fp); - } -} - -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 = g_strdup(user); - - /* this is needed by libs such as arts */ - g_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(); - } - - g_free(user_name); -} - -#endif |