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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2011 New Dream Network
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include "common/Thread.h"
#include "common/ceph_argparse.h"
#include "common/code_environment.h"
#include "common/common_init.h"
#include "common/config.h"
#include "common/debug.h"
#include "common/errno.h"
#include "common/safe_io.h"
#include "common/signal.h"
#include "common/version.h"
#include "global/global_context.h"
#include "global/global_init.h"
#include "global/pidfile.h"
#include "global/signal_handler.h"
#include "include/compat.h"
#include "include/color.h"
#include <errno.h>
#include <deque>
#define dout_subsys ceph_subsys_
static void global_init_set_globals(CephContext *cct)
{
g_ceph_context = cct;
g_conf = cct->_conf;
}
static void output_ceph_version()
{
char buf[1024];
snprintf(buf, sizeof(buf), "%s, process %s, pid %d",
pretty_version_to_str().c_str(),
get_process_name_cpp().c_str(), getpid());
generic_dout(0) << buf << dendl;
}
static const char* c_str_or_null(const std::string &str)
{
if (str.empty())
return NULL;
return str.c_str();
}
void global_init(std::vector < const char * > *alt_def_args, std::vector < const char* >& args,
uint32_t module_type, code_environment_t code_env, int flags)
{
// You can only call global_init once.
assert(!g_ceph_context);
std::string conf_file_list;
std::string cluster = "ceph";
CephInitParameters iparams = ceph_argparse_early_args(args, module_type, flags,
&cluster, &conf_file_list);
CephContext *cct = common_preinit(iparams, code_env, flags);
cct->_conf->cluster = cluster;
global_init_set_globals(cct);
md_config_t *conf = cct->_conf;
if (alt_def_args)
conf->parse_argv(*alt_def_args); // alternative default args
std::deque<std::string> parse_errors;
int ret = conf->parse_config_files(c_str_or_null(conf_file_list), &parse_errors, flags);
if (ret == -EDOM) {
dout_emergency("global_init: error parsing config file.\n");
_exit(1);
}
else if (ret == -EINVAL) {
if (!(flags & CINIT_FLAG_NO_DEFAULT_CONFIG_FILE)) {
if (conf_file_list.length()) {
dout_emergency("global_init: unable to open config file.\n");
_exit(1);
} else {
derr <<"did not load config file, using default settings." << dendl;
}
}
}
else if (ret) {
dout_emergency("global_init: error reading config file.\n");
_exit(1);
}
conf->parse_env(); // environment variables override
conf->parse_argv(args); // argv override
// Expand metavariables. Invoke configuration observers.
conf->apply_changes(NULL);
g_lockdep = cct->_conf->lockdep;
// Now we're ready to complain about config file parse errors
if (conf_file_list.length()) {
complain_about_parse_errors(cct, &parse_errors);
}
// signal stuff
int siglist[] = { SIGPIPE, 0 };
block_signals(siglist, NULL);
install_standard_sighandlers();
if (g_conf->log_flush_on_exit)
g_ceph_context->_log->set_flush_on_exit();
if (g_lockdep) {
dout(1) << "lockdep is enabled" << dendl;
lockdep_register_ceph_context(cct);
}
register_assert_context(cct);
}
void global_print_banner(void)
{
output_ceph_version();
}
static void pidfile_remove_void(void)
{
pidfile_remove();
}
void global_init_daemonize(CephContext *cct, int flags)
{
if (g_code_env != CODE_ENVIRONMENT_DAEMON)
return;
const md_config_t *conf = cct->_conf;
if (!conf->daemonize)
return;
// stop log thread
g_ceph_context->_log->stop();
int ret = daemon(1, 1);
if (ret) {
ret = errno;
derr << "global_init_daemonize: BUG: daemon error: "
<< cpp_strerror(ret) << dendl;
exit(1);
}
// restart log thread
g_ceph_context->_log->start();
if (atexit(pidfile_remove_void)) {
derr << "global_init_daemonize: failed to set pidfile_remove function "
<< "to run at exit." << dendl;
}
/* This is the old trick where we make file descriptors 0, 1, and possibly 2
* point to /dev/null.
*
* We have to do this because otherwise some arbitrary call to open() later
* in the program might get back one of these file descriptors. It's hard to
* guarantee that nobody ever writes to stdout, even though they're not
* supposed to.
*/
TEMP_FAILURE_RETRY(close(STDIN_FILENO));
if (open("/dev/null", O_RDONLY) < 0) {
int err = errno;
derr << "global_init_daemonize: open(/dev/null) failed: error "
<< err << dendl;
exit(1);
}
TEMP_FAILURE_RETRY(close(STDOUT_FILENO));
if (open("/dev/null", O_RDONLY) < 0) {
int err = errno;
derr << "global_init_daemonize: open(/dev/null) failed: error "
<< err << dendl;
exit(1);
}
if (!(flags & CINIT_FLAG_NO_CLOSE_STDERR)) {
ret = global_init_shutdown_stderr(cct);
if (ret) {
derr << "global_init_daemonize: global_init_shutdown_stderr failed with "
<< "error code " << ret << dendl;
exit(1);
}
}
pidfile_write(g_conf);
ldout(cct, 1) << "finished global_init_daemonize" << dendl;
}
void global_init_chdir(const CephContext *cct)
{
const md_config_t *conf = cct->_conf;
if (conf->chdir.empty())
return;
if (::chdir(conf->chdir.c_str())) {
int err = errno;
derr << "global_init_chdir: failed to chdir to directory: '"
<< conf->chdir << "': " << cpp_strerror(err) << dendl;
}
}
/* Map stderr to /dev/null. This isn't really re-entrant; we rely on the old unix
* behavior that the file descriptor that gets assigned is the lowest
* available one.
*/
int global_init_shutdown_stderr(CephContext *cct)
{
TEMP_FAILURE_RETRY(close(STDERR_FILENO));
if (open("/dev/null", O_RDONLY) < 0) {
int err = errno;
derr << "global_init_shutdown_stderr: open(/dev/null) failed: error "
<< err << dendl;
return 1;
}
cct->_log->set_stderr_level(-1, -1);
return 0;
}
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