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/*
* $Id: main.c,v 1.20.4.2.2.9 2004/05/12 21:21:48 didg Exp $
*
* Copyright (c) 1990,1993 Regents of The University of Michigan.
* All Rights Reserved. See COPYRIGHT.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <sys/param.h>
#include <sys/uio.h>
#include <atalk/logger.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <errno.h>
#include <atalk/adouble.h>
#include <netatalk/at.h>
#include <atalk/compat.h>
#include <atalk/dsi.h>
#include <atalk/atp.h>
#include <atalk/asp.h>
#include <atalk/afp.h>
#include <atalk/paths.h>
#include <atalk/util.h>
#include <atalk/server_child.h>
#include <atalk/server_ipc.h>
#include "globals.h"
#include "afp_config.h"
#include "status.h"
#include "fork.h"
#include "uam_auth.h"
#ifdef TRU64
#include <sys/security.h>
#include <prot.h>
#include <sia.h>
static int argc = 0;
static char **argv = NULL;
#endif /* TRU64 */
unsigned char nologin = 0;
struct afp_options default_options;
static AFPConfig *configs;
static server_child *server_children;
static fd_set save_rfds;
static int Ipc_fd = -1;
#ifdef TRU64
void afp_get_cmdline( int *ac, char ***av)
{
*ac = argc;
*av = argv;
}
#endif /* TRU64 */
static void afp_exit(const int i)
{
server_unlock(default_options.pidfile);
exit(i);
}
/* ------------------
initialize fd set we are waiting for.
*/
static void set_fd(int ipc_fd)
{
AFPConfig *config;
FD_ZERO(&save_rfds);
for (config = configs; config; config = config->next) {
if (config->fd < 0) /* for proxies */
continue;
FD_SET(config->fd, &save_rfds);
}
if (ipc_fd >= 0) {
FD_SET(ipc_fd, &save_rfds);
}
}
/* ------------------ */
static void afp_goaway(int sig)
{
#ifndef NO_DDP
asp_kill(sig);
#endif /* ! NO_DDP */
dsi_kill(sig);
switch( sig ) {
case SIGTERM :
LOG(log_info, logtype_afpd, "shutting down on signal %d", sig );
break;
case SIGUSR1 :
case SIGHUP :
/* w/ a configuration file, we can force a re-read if we want */
nologin++;
auth_unload();
if (sig == SIGHUP || ((nologin + 1) & 1)) {
AFPConfig *config;
LOG(log_info, logtype_afpd, "re-reading configuration file");
for (config = configs; config; config = config->next)
if (config->server_cleanup)
config->server_cleanup(config);
/* configfree close atp socket used for DDP tickle, there's an issue
* with atp tid.
*/
configfree(configs, NULL);
if (!(configs = configinit(&default_options))) {
LOG(log_error, logtype_afpd, "config re-read: no servers configured");
afp_exit(EXITERR_CONF);
}
set_fd(Ipc_fd);
} else {
LOG(log_info, logtype_afpd, "disallowing logins");
}
if (sig == SIGHUP) {
nologin = 0;
}
break;
default :
LOG(log_error, logtype_afpd, "afp_goaway: bad signal" );
}
if ( sig == SIGTERM ) {
AFPConfig *config;
for (config = configs; config; config = config->next)
if (config->server_cleanup)
config->server_cleanup(config);
afp_exit(0);
}
return;
}
static void child_handler()
{
server_child_handler(server_children);
}
int main( ac, av )
int ac;
char **av;
{
AFPConfig *config;
fd_set rfds;
void *ipc;
struct sigaction sv;
sigset_t sigs;
int ret;
#ifdef TRU64
argc = ac;
argv = av;
set_auth_parameters( ac, av );
#endif /* TRU64 */
#ifdef DEBUG1
fault_setup(NULL);
#endif
afp_options_init(&default_options);
if (!afp_options_parse(ac, av, &default_options))
exit(EXITERR_CONF);
/* Save the user's current umask for use with CNID (and maybe some
* other things, too). */
default_options.save_mask = umask( default_options.umask );
switch(server_lock("afpd", default_options.pidfile,
default_options.flags & OPTION_DEBUG)) {
case -1: /* error */
exit(EXITERR_SYS);
case 0: /* child */
break;
default: /* server */
exit(0);
}
/* Register CNID */
cnid_init();
/* install child handler for asp and dsi. we do this before afp_goaway
* as afp_goaway references stuff from here.
* XXX: this should really be setup after the initial connections. */
if (!(server_children = server_child_alloc(default_options.connections,
CHILD_NFORKS))) {
LOG(log_error, logtype_afpd, "main: server_child alloc: %s", strerror(errno) );
afp_exit(EXITERR_SYS);
}
#ifdef AFP3x
/* linux at least up to 2.4.22 send a SIGXFZ for vfat fs,
even if the file is open with O_LARGEFILE ! */
#ifdef SIGXFSZ
signal(SIGXFSZ , SIG_IGN);
#endif
#endif
memset(&sv, 0, sizeof(sv));
sv.sa_handler = child_handler;
sigemptyset( &sv.sa_mask );
sigaddset(&sv.sa_mask, SIGALRM);
sigaddset(&sv.sa_mask, SIGHUP);
sigaddset(&sv.sa_mask, SIGTERM);
sigaddset(&sv.sa_mask, SIGUSR1);
sv.sa_flags = SA_RESTART;
if ( sigaction( SIGCHLD, &sv, 0 ) < 0 ) {
LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
afp_exit(EXITERR_SYS);
}
sv.sa_handler = afp_goaway;
sigemptyset( &sv.sa_mask );
sigaddset(&sv.sa_mask, SIGALRM);
sigaddset(&sv.sa_mask, SIGTERM);
sigaddset(&sv.sa_mask, SIGHUP);
sigaddset(&sv.sa_mask, SIGCHLD);
sv.sa_flags = SA_RESTART;
if ( sigaction( SIGUSR1, &sv, 0 ) < 0 ) {
LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
afp_exit(EXITERR_SYS);
}
sigemptyset( &sv.sa_mask );
sigaddset(&sv.sa_mask, SIGALRM);
sigaddset(&sv.sa_mask, SIGTERM);
sigaddset(&sv.sa_mask, SIGUSR1);
sigaddset(&sv.sa_mask, SIGCHLD);
sv.sa_flags = SA_RESTART;
if ( sigaction( SIGHUP, &sv, 0 ) < 0 ) {
LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
afp_exit(EXITERR_SYS);
}
sigemptyset( &sv.sa_mask );
sigaddset(&sv.sa_mask, SIGALRM);
sigaddset(&sv.sa_mask, SIGHUP);
sigaddset(&sv.sa_mask, SIGUSR1);
sigaddset(&sv.sa_mask, SIGCHLD);
sv.sa_flags = SA_RESTART;
if ( sigaction( SIGTERM, &sv, 0 ) < 0 ) {
LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
afp_exit(EXITERR_SYS);
}
/* afpd.conf: not in config file: lockfile, connections, configfile
* preference: command-line provides defaults.
* config file over-writes defaults.
*
* we also need to make sure that killing afpd during startup
* won't leave any lingering registered names around.
*/
sigemptyset(&sigs);
sigaddset(&sigs, SIGALRM);
sigaddset(&sigs, SIGHUP);
sigaddset(&sigs, SIGUSR1);
#if 0
/* don't block SIGTERM */
sigaddset(&sigs, SIGTERM);
#endif
sigaddset(&sigs, SIGCHLD);
sigprocmask(SIG_BLOCK, &sigs, NULL);
if (!(configs = configinit(&default_options))) {
LOG(log_error, logtype_afpd, "main: no servers configured: %s", strerror(errno));
afp_exit(EXITERR_CONF);
}
sigprocmask(SIG_UNBLOCK, &sigs, NULL);
/* watch atp, dsi sockets and ipc parent/child file descriptor. */
if ((ipc = server_ipc_create())) {
Ipc_fd = server_ipc_parent(ipc);
}
set_fd(Ipc_fd);
/* wait for an appleshare connection. parent remains in the loop
* while the children get handled by afp_over_{asp,dsi}. this is
* currently vulnerable to a denial-of-service attack if a
* connection is made without an actual login attempt being made
* afterwards. establishing timeouts for logins is a possible
* solution. */
while (1) {
rfds = save_rfds;
sigprocmask(SIG_UNBLOCK, &sigs, NULL);
ret = select(FD_SETSIZE, &rfds, NULL, NULL, NULL);
sigprocmask(SIG_BLOCK, &sigs, NULL);
if (ret < 0) {
if (errno == EINTR)
continue;
LOG(log_error, logtype_afpd, "main: can't wait for input: %s", strerror(errno));
break;
}
if (Ipc_fd >=0 && FD_ISSET(Ipc_fd, &rfds)) {
server_ipc_read(server_children);
}
for (config = configs; config; config = config->next) {
if (config->fd < 0)
continue;
if (FD_ISSET(config->fd, &rfds)) {
config->server_start(config, configs, server_children);
}
}
}
return 0;
}
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