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/**
* Licensed to the University Corporation for Advanced Internet
* Development, Inc. (UCAID) under one or more contributor license
* agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership.
*
* UCAID licenses this file to you under the Apache License,
* Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the
* License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific
* language governing permissions and limitations under the License.
*/
/*
* shibd.cpp -- the shibd "main" code.
*/
// eventually we might be able to support autoconf via cygwin...
#if defined (_MSC_VER) || defined(__BORLANDC__)
# include "config_win32.h"
#else
# include "config.h"
#endif
#ifdef WIN32
# define _CRT_NONSTDC_NO_DEPRECATE 1
# define _CRT_SECURE_NO_DEPRECATE 1
#endif
#include <shibsp/SPConfig.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
# include <sys/select.h>
#endif
#if defined(HAVE_GRP_H) && defined(HAVE_PWD_H)
# include <pwd.h>
# include <grp.h>
#endif
#include <stdio.h>
#include <signal.h>
#include <shibsp/ServiceProvider.h>
#include <shibsp/remoting/ListenerService.h>
#include <xercesc/util/XMLUniDefs.hpp>
#include <xmltooling/XMLToolingConfig.h>
#include <xmltooling/util/XMLConstants.h>
#include <xmltooling/util/XMLHelper.h>
#ifdef HAVE_SD_NOTIFY
#include <systemd/sd-daemon.h>
#else
#define SD_EMERG ""
#define SD_ALERT ""
#define SD_CRIT ""
#define SD_ERR ""
#define SD_WARNING ""
#define SD_NOTICE ""
#define SD_INFO ""
#define SD_DEBUG ""
#endif
using namespace shibsp;
using namespace xmltooling;
using namespace std;
bool shibd_shutdown = false;
const char* shar_config = nullptr;
const char* shar_schemadir = nullptr;
const char* shar_prefix = nullptr;
bool shar_checkonly = false;
bool shar_version = false;
static bool unlink_socket = false;
const char* pidfile = nullptr;
#ifdef WIN32
//#include <CRTDBG.H>
#define nNoMansLandSize 4
typedef struct _CrtMemBlockHeader
{
struct _CrtMemBlockHeader * pBlockHeaderNext;
struct _CrtMemBlockHeader * pBlockHeaderPrev;
char * szFileName;
int nLine;
size_t nDataSize;
int nBlockUse;
long lRequest;
unsigned char gap[nNoMansLandSize];
/* followed by:
* unsigned char data[nDataSize];
* unsigned char anotherGap[nNoMansLandSize];
*/
} _CrtMemBlockHeader;
/*
int MyAllocHook(int nAllocType, void *pvData,
size_t nSize, int nBlockUse, long lRequest,
const unsigned char * szFileName, int nLine)
{
if ( nBlockUse == _CRT_BLOCK )
return( TRUE );
if (nAllocType == _HOOK_FREE) {
_CrtMemBlockHeader* ptr = (_CrtMemBlockHeader*)(((_CrtMemBlockHeader *)pvData)-1);
if (ptr->nDataSize == 8192)
fprintf(stderr,"free request %u size %u\n", ptr->lRequest, ptr->nDataSize);
}
else if (nAllocType == _HOOK_ALLOC && nSize == 8192)
fprintf(stderr,"%s request %u size %u\n", ((nAllocType == _HOOK_ALLOC) ? "alloc" : "realloc"), lRequest, nSize);
return (TRUE);
}
*/
int real_main(int preinit)
{
if (shar_version) {
if (preinit)
fprintf(stdout, PACKAGE_STRING"\n");
return 0;
}
SPConfig& conf = SPConfig::getConfig();
if (preinit) {
// Initialize the SP library.
conf.setFeatures(
SPConfig::Listener |
SPConfig::Caching |
SPConfig::Metadata |
SPConfig::Trust |
SPConfig::Credentials |
SPConfig::AttributeResolution |
SPConfig::Handlers |
SPConfig::OutOfProcess |
(shar_checkonly ? SPConfig::RequestMapping : SPConfig::Logging)
);
if (!conf.init(shar_schemadir, shar_prefix)) {
fprintf(stderr, "configuration is invalid, see console for specific problems\n");
return -1;
}
if (!conf.instantiate(shar_config)) {
fprintf(stderr, "configuration is invalid, check console for specific problems\n");
conf.term();
return -2;
}
// If just a test run, bail.
if (shar_checkonly) {
fprintf(stdout, "overall configuration is loadable, check console for non-fatal problems\n");
return 0;
}
}
else {
//_CrtSetAllocHook(MyAllocHook);
if (!shar_checkonly) {
// Run the listener.
ListenerService* listener = conf.getServiceProvider()->getListenerService();
if (!listener->init(unlink_socket)) {
fprintf(stderr, "listener failed to initialize\n");
conf.term();
return -3;
}
else if (!listener->run(&shibd_shutdown)) {
fprintf(stderr, "listener failed during service\n");
listener->term();
conf.term();
return -3;
}
listener->term();
}
conf.term();
}
return 0;
}
#else
int daemon_wait = 3;
bool shibd_running = false;
bool daemonize = true;
const char* runasuser = nullptr;
const char* runasgroup = nullptr;
static void term_handler(int arg)
{
shibd_shutdown = true;
}
static void run_handler(int arg)
{
shibd_running = true;
}
static void child_handler(int arg)
{
// Terminate the parent's wait/sleep if the newly born daemon dies early.
}
static int setup_signals(void)
{
struct sigaction sa;
memset(&sa, 0, sizeof (sa));
sa.sa_handler = SIG_IGN;
sa.sa_flags = SA_RESTART;
if (sigaction(SIGPIPE, &sa, nullptr) < 0) {
return -1;
}
memset(&sa, 0, sizeof (sa));
sa.sa_handler = term_handler;
sa.sa_flags = SA_RESTART;
if (sigaction(SIGHUP, &sa, nullptr) < 0) {
return -1;
}
if (sigaction(SIGINT, &sa, nullptr) < 0) {
return -1;
}
if (sigaction(SIGQUIT, &sa, nullptr) < 0) {
return -1;
}
if (sigaction(SIGTERM, &sa, nullptr) < 0) {
return -1;
}
if (daemonize) {
memset(&sa, 0, sizeof (sa));
sa.sa_handler = run_handler;
if (sigaction(SIGUSR1, &sa, nullptr) < 0) {
return -1;
}
memset(&sa, 0, sizeof (sa));
sa.sa_handler = child_handler;
if (sigaction(SIGCHLD, &sa, nullptr) < 0) {
return -1;
}
}
return 0;
}
static void usage(char* whoami)
{
fprintf(stderr, "usage: %s [-dcxtfFpwugvh]\n", whoami);
fprintf(stderr, " -d\tinstallation prefix to use\n");
fprintf(stderr, " -c\tconfig file to use\n");
fprintf(stderr, " -x\tXML schema catalogs to use\n");
fprintf(stderr, " -t\ttest configuration file for problems\n");
fprintf(stderr, " -f\tforce removal of listener socket\n");
fprintf(stderr, " -F\tstay in the foreground\n");
fprintf(stderr, " -p\tpid file to use\n");
fprintf(stderr, " -w\tseconds to wait for successful daemonization\n");
fprintf(stderr, " -u\tuser to run under\n");
fprintf(stderr, " -g\tgroup to run under\n");
fprintf(stderr, " -v\tprint software version\n");
fprintf(stderr, " -h\tprint this help message\n");
exit(1);
}
static int parse_args(int argc, char* argv[])
{
int opt;
while ((opt = getopt(argc, argv, "d:c:x:p:w:u:g:fFtvh")) > 0) {
switch (opt) {
case 'd':
shar_prefix=optarg;
break;
case 'c':
shar_config=optarg;
break;
case 'x':
shar_schemadir=optarg;
break;
case 'f':
unlink_socket = true;
break;
case 'F':
daemonize = false;
break;
case 't':
shar_checkonly=true;
daemonize=false;
break;
case 'v':
shar_version=true;
break;
case 'p':
pidfile=optarg;
break;
case 'w':
if (optarg)
daemon_wait = atoi(optarg);
if (daemon_wait <= 0)
daemon_wait = 3;
break;
case 'u':
if (optarg)
runasuser = optarg;
break;
case 'g':
if (optarg)
runasgroup = optarg;
break;
default:
return -1;
}
}
return 0;
}
int main(int argc, char *argv[])
{
if (parse_args(argc, argv) != 0)
usage(argv[0]);
else if (shar_version) {
fprintf(stdout, PACKAGE_STRING"\n");
return 0;
}
if (setup_signals() != 0)
return -1;
if (runasgroup) {
#ifdef HAVE_GETGRNAM
struct group* grp = getgrnam(runasgroup);
if (!grp) {
fprintf(stderr, "getgrnam failed, check -g option\n");
return -1;
}
if (setgid(grp->gr_gid) != 0) {
fprintf(stderr, "setgid failed, check -g option\n");
return -1;
}
#else
fprintf(stderr, "-g not supported on this platform");
return -1;
#endif
}
if (runasuser) {
#ifdef HAVE_GETPWNAM
struct passwd* pwd = getpwnam(runasuser);
if (!pwd) {
fprintf(stderr, "getpwnam failed, check -u option\n");
return -1;
}
#ifdef HAVE_INITGROUPS
// w/out initgroups/setgroups process retains supplementary groups
if (initgroups(pwd->pw_name, pwd->pw_gid) != 0) {
fprintf(stderr, "initgroups failed, check -u option\n");
return -1;
}
#endif
if (setuid(pwd->pw_uid) != 0) {
fprintf(stderr, "setuid failed, check -u option\n");
return -1;
}
#else
fprintf(stderr, "-u not supported on this platform");
return -1;
#endif
}
// initialize the shib-target library
SPConfig& conf=SPConfig::getConfig();
conf.setFeatures(
SPConfig::Listener |
SPConfig::Caching |
SPConfig::Metadata |
SPConfig::Trust |
SPConfig::Credentials |
SPConfig::AttributeResolution |
SPConfig::Handlers |
SPConfig::OutOfProcess |
(shar_checkonly ? SPConfig::RequestMapping : SPConfig::Logging)
);
if (!conf.init(shar_schemadir, shar_prefix)) {
fprintf(stderr, SD_ERR "configuration is invalid, check console for specific problems\n");
return -1;
}
if (daemonize) {
// We must fork() early, while we're single threaded.
// StorageService cleanup thread is about to start.
switch (fork()) {
case 0:
break;
case -1:
perror("forking");
exit(EXIT_FAILURE);
default:
sleep(daemon_wait);
exit(shibd_running ? EXIT_SUCCESS : EXIT_FAILURE);
}
}
if (!conf.instantiate(shar_config)) {
fprintf(stderr, SD_ERR "configuration is invalid, check console for specific problems\n");
conf.term();
return -2;
}
if (shar_checkonly)
fprintf(stderr, "overall configuration is loadable, check console for non-fatal problems\n");
else {
// Init the listener.
ListenerService* listener = conf.getServiceProvider()->getListenerService();
if (!listener->init(unlink_socket)) {
fprintf(stderr, SD_ERR "listener failed to initialize\n");
conf.term();
return -3;
}
if (daemonize) {
if (setsid() == -1) {
perror("setsid");
exit(EXIT_FAILURE);
}
if (chdir("/") == -1) {
perror("chdir to root");
exit(EXIT_FAILURE);
}
if (pidfile) {
FILE* pidf = fopen(pidfile, "w");
if (pidf) {
fprintf(pidf, "%d\n", getpid());
fclose(pidf);
}
else {
perror(pidfile);
}
}
freopen("/dev/null", "r", stdin);
freopen("/dev/null", "w", stdout);
freopen("/dev/null", "w", stderr);
// Signal our parent that we are A-OK.
kill(getppid(), SIGUSR1);
}
// Run the listener.
#ifdef HAVE_SD_NOTIFY
sd_notify(0, "READY=1");
#endif
if (!listener->run(&shibd_shutdown)) {
fprintf(stderr, SD_ERR "listener failure during service\n");
listener->term();
conf.term();
if (daemonize && pidfile)
unlink(pidfile);
return -3;
}
listener->term();
}
#ifdef HAVE_SD_NOTIFY
sd_notify(0, "STOPPING=1");
#endif
conf.term();
if (daemonize && pidfile)
unlink(pidfile);
return 0;
}
#endif
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