server.c revision f85ae5fce84ad7bdc515c1ec324b9c56cb1a39b2
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens SSSD
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens Servers setup routines
1d452cf5123cb6ac0a013a4dbd4dcceeb0da314dahrens
1d452cf5123cb6ac0a013a4dbd4dcceeb0da314dahrens Copyright (C) Andrew Tridgell 1992-2005
fa9e4066f08beec538e775443c5be79dd423fcabahrens Copyright (C) Martin Pool 2002
fa9e4066f08beec538e775443c5be79dd423fcabahrens Copyright (C) Jelmer Vernooij 2002
fa9e4066f08beec538e775443c5be79dd423fcabahrens Copyright (C) James J Myers 2003 <myersjj@samba.org>
fa9e4066f08beec538e775443c5be79dd423fcabahrens Copyright (C) Simo Sorce 2008
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens This program is free software; you can redistribute it and/or modify
fa9e4066f08beec538e775443c5be79dd423fcabahrens it under the terms of the GNU General Public License as published by
fa9e4066f08beec538e775443c5be79dd423fcabahrens the Free Software Foundation; either version 3 of the License, or
fa9e4066f08beec538e775443c5be79dd423fcabahrens (at your option) any later version.
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens This program is distributed in the hope that it will be useful,
fa9e4066f08beec538e775443c5be79dd423fcabahrens but WITHOUT ANY WARRANTY; without even the implied warranty of
fa9e4066f08beec538e775443c5be79dd423fcabahrens MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
fa9e4066f08beec538e775443c5be79dd423fcabahrens GNU General Public License for more details.
fa9e4066f08beec538e775443c5be79dd423fcabahrens
148434217c040ea38dc844384f6ba68d9b325906Matthew Ahrens You should have received a copy of the GNU General Public License
fa9e4066f08beec538e775443c5be79dd423fcabahrens along with this program. If not, see <http://www.gnu.org/licenses/>.
fa9e4066f08beec538e775443c5be79dd423fcabahrens*/
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <stdbool.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <unistd.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <popt.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/types.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/stat.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include "util/util.h"
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include "../events/events.h"
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include "../ldb/include/ldb.h"
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include "confdb/confdb.h"
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include "providers/providers.h"
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include "monitor.h"
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensextern int nss_process_init(TALLOC_CTX *mem_ctx,
fa9e4066f08beec538e775443c5be79dd423fcabahrens struct event_context *ev,
fa9e4066f08beec538e775443c5be79dd423fcabahrens struct confdb_ctx *cdb);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
b81d61a68b235e0529ebadc18e14d9d1dd52a258llingstatic void sig_hup(int sig)
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks{
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* cycle log/debug files */
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks}
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void sig_term(int sig)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
89eef05efc3ad959ce1fcc4fbf4d428b4fc015adrm#if HAVE_GETPGRP
1d452cf5123cb6ac0a013a4dbd4dcceeb0da314dahrens static int done_sigterm;
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks if (done_sigterm == 0 && getpgrp() == getpid()) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens DEBUG(0,("SIGTERM: killing children\n"));
fa9e4066f08beec538e775443c5be79dd423fcabahrens done_sigterm = 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens kill(-getpgrp(), SIGTERM);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif
fa9e4066f08beec538e775443c5be79dd423fcabahrens exit(0);
}
/*
setup signal masks
*/
static void setup_signals(void)
{
/* we are never interested in SIGPIPE */
BlockSignals(true, SIGPIPE);
#if defined(SIGFPE)
/* we are never interested in SIGFPE */
BlockSignals(true, SIGFPE);
#endif
/* We are no longer interested in USR1 */
BlockSignals(true, SIGUSR1);
#if defined(SIGUSR2)
/* We are no longer interested in USR2 */
BlockSignals(true, SIGUSR2);
#endif
/* POSIX demands that signals are inherited. If the invoking process has
* these signals masked, we will have problems, as we won't recieve them. */
BlockSignals(false, SIGHUP);
BlockSignals(false, SIGTERM);
CatchSignal(SIGHUP, sig_hup);
CatchSignal(SIGTERM, sig_term);
}
/*
handle io on stdin
*/
static void server_stdin_handler(struct event_context *event_ctx, struct fd_event *fde,
uint16_t flags, void *private)
{
const char *binary_name = (const char *)private;
uint8_t c;
if (read(0, &c, 1) == 0) {
DEBUG(0,("%s: EOF on stdin - terminating\n", binary_name));
#if HAVE_GETPGRP
if (getpgrp() == getpid()) {
kill(-getpgrp(), SIGTERM);
}
#endif
exit(0);
}
}
/*
main server.
*/
int main(int argc, const char *argv[])
{
char *service = NULL;
bool opt_daemon = false;
bool opt_interactive = false;
int opt;
poptContext pc;
struct event_context *event_ctx;
struct confdb_ctx *confdb_ctx;
TALLOC_CTX *mem_ctx;
uint16_t stdin_event_flags;
int ret = EOK;
bool is_monitor = false;
debug_prg_name = argv[0];
enum {
OPT_DAEMON = 1000,
OPT_INTERACTIVE
};
struct poptOption long_options[] = {
POPT_AUTOHELP
{"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON,
"Become a daemon (default)", NULL },
{"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE,
"Run interactive (not a daemon)", NULL},
{"service", 's', POPT_ARG_STRING, &service, 0,
"Executes a specific service instead of the monitor", NULL},
{"debug-level", 'd', POPT_ARG_INT, &debug_level, 0,
"Executes a specific service instead of the monitor", NULL},
{ NULL }
};
pc = poptGetContext(argv[0], argc, argv, long_options, 0);
while((opt = poptGetNextOpt(pc)) != -1) {
switch(opt) {
case OPT_DAEMON:
opt_daemon = true;
break;
case OPT_INTERACTIVE:
opt_interactive = true;
break;
default:
fprintf(stderr, "\nInvalid option %s: %s\n\n",
poptBadOption(pc, 0), poptStrerror(opt));
poptPrintUsage(pc, stderr, 0);
return 1;
}
}
if (!service) {
fprintf(stderr,"\nERROR: No service specified\n\n");
return 5;
}
if (strcmp(service, "monitor") == 0) is_monitor = true;
if (is_monitor) {
if (opt_daemon && opt_interactive) {
fprintf(stderr,"\nERROR: "
"Option -i|--interactive is not allowed together with -D|--daemon\n\n");
poptPrintUsage(pc, stderr, 0);
return 1;
} else if (!opt_interactive) {
/* default is --daemon */
opt_daemon = true;
}
} else {
if (opt_daemon || opt_interactive) {
fprintf(stderr,"\nERROR: "
"Options -i or -D not allowed with -s (service)\n\n");
poptPrintUsage(pc, stderr, 0);
return 1;
}
}
poptFreeContext(pc);
setup_signals();
/* we want default permissions on created files to be very strict,
so set our umask to 0177 */
umask(0177);
if (opt_daemon) {
DEBUG(3,("Becoming a daemon.\n"));
become_daemon(true);
ret = pidfile(PID_PATH, "sssd");
if (ret != EOK) {
fprintf(stderr, "\nERROR: PID File reports daemon already running!\n");
return 1;
}
}
/* the event context is the top level structure.
* Everything else should hang off that */
event_ctx = event_context_init(talloc_autofree_context());
if (event_ctx == NULL) {
DEBUG(0,("The event context initialiaziton failed\n"));
return 1;
}
mem_ctx = talloc_new(event_ctx);
if (mem_ctx == NULL) {
DEBUG(0,("Out of memory, aborting!\n"));
return 1;
}
ret = confdb_init(mem_ctx, event_ctx, &confdb_ctx);
if (ret != EOK) {
DEBUG(0,("The confdb initialization failed\n"));
return 1;
}
if (opt_interactive) {
/* terminate when stdin goes away */
stdin_event_flags = EVENT_FD_READ;
} else {
/* stay alive forever */
stdin_event_flags = 0;
}
/* catch EOF on stdin */
#ifdef SIGTTIN
signal(SIGTTIN, SIG_IGN);
#endif
event_add_fd(event_ctx, event_ctx, 0, stdin_event_flags,
server_stdin_handler,
discard_const(argv[0]));
/* What are we asked to run ? */
if (is_monitor) {
/* the monitor */
ret = monitor_process_init(mem_ctx, event_ctx, confdb_ctx);
} else {
if (strcmp(service, "nss") == 0) {
ret = nss_process_init(mem_ctx, event_ctx, confdb_ctx);
} else if (strcmp(service, "dp") == 0) {
ret = dp_process_init(mem_ctx, event_ctx, confdb_ctx);
} else {
fprintf(stderr,
"\nERROR: Unknown Service specified [%s]\n",
service);
ret = EINVAL;
}
}
if (ret != EOK) return 3;
/* wait for events - this is where smbd sits for most of its
life */
event_loop_wait(event_ctx);
/* as everything hangs off this event context, freeing it
should initiate a clean shutdown of all services */
talloc_free(event_ctx);
return 0;
}