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daemon.c
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daemon.c
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/*
* Copyright (c) Regents of The University of Michigan
* See COPYING.
*/
#include <config.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/file.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <assert.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <netdb.h>
#include <pwd.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <syslog.h>
#include <unistd.h>
#ifdef __linux__
#include <sys/prctl.h>
#endif /* __linux__ */
#ifdef HAVE_LIBSSL
#include "tls.h"
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/ssl.h>
#endif /* HAVE_LIBSSL */
#include <snet.h>
#include "argcargv.h"
#include "envelope.h"
#include "ll.h"
#include "q_cleanup.h"
#include "queue.h"
#include "simta.h"
#include "simta_malloc.h"
#ifdef HAVE_LDAP
#include "simta_ldap.h"
#endif /* HAVE_LDAP */
#ifdef HAVE_LIBSASL
#include "simta_sasl.h"
#endif /* HAVE_LIBSASL */
const char *simta_progname = "simta";
struct connection_info *cinfo_stab = NULL;
int simta_pidfd;
int simsendmail_signal = 0;
int command_signal = 0;
struct sigaction sa;
struct sigaction osahup;
struct sigaction osachld;
struct sigaction osausr1;
struct sigaction osausr2;
const char *version = PACKAGE_VERSION;
struct simta_socket *simta_listen_sockets = NULL;
int daemon_local(void);
int hq_launch(void);
simta_result sender_promote(char *);
simta_result mid_promote(char *);
void env_log_metrics(struct dll_entry *);
void sender_log_metrics(struct dll_entry *);
int daemon_commands(struct simta_dirp *);
void usr1(int);
void usr2(int);
void hup(int);
void chld(int);
int main(int, char *av[]);
int simta_wait_for_child(int);
int simta_sigaction_reset(bool);
int simta_server(bool);
int simta_daemonize_server(void);
int simta_child_receive(struct simta_socket *);
struct simta_socket *simta_listen_port(const char *);
int simta_listen(void);
struct proc_type *simta_proc_add(int, int);
int simta_proc_q_runner(int, struct host_q *);
int simta_read_command(struct simta_dirp *);
int set_sleep_time(int *, int);
void
usr1(int sig) {
simsendmail_signal = 1;
return;
}
void
usr2(int sig) {
command_signal = 1;
return;
}
void
hup(int sig) {
/* hup does nothing at the moment */
return;
}
void
chld(int sig) {
simta_child_signal = 1;
return;
}
int
simta_listen(void) {
int retval = 1;
ucl_object_iter_t iter;
const ucl_object_t *obj;
#ifdef HAVE_LIBSSL
struct simta_socket *ss;
#endif /* HAVE_LIBSSL */
iter = ucl_object_iterate_new(simta_config_obj("receive.ports"));
while ((obj = ucl_object_iterate_safe(iter, false)) != NULL) {
if (simta_listen_port(ucl_object_tostring_forced(obj)) == NULL) {
goto error;
}
}
#ifdef HAVE_LIBSSL
if (simta_config_bool("receive.tls.enabled")) {
ucl_object_iterate_reset(iter, simta_config_obj("receive.tls.ports"));
while ((obj = ucl_object_iterate_safe(iter, false)) != NULL) {
if ((ss = simta_listen_port(ucl_object_tostring_forced(obj))) ==
NULL) {
goto error;
}
ss->ss_flags |= SIMTA_SOCKET_TLS;
}
}
#endif /* HAVE_LIBSSL */
retval = 0;
error:
ucl_object_iterate_free(iter);
return (retval);
}
struct simta_socket *
simta_listen_port(const char *port) {
int sockopt;
int rc;
char host[ NI_MAXHOST ];
char service[ NI_MAXSERV ];
struct addrinfo hints;
struct addrinfo *ai, *air;
struct simta_socket *ss = NULL;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE | AI_NUMERICSERV;
if ((rc = getaddrinfo(NULL, port, &hints, &air)) != 0) {
syslog(LOG_ERR, "Syserror: simta_listen getaddrinfo: %s",
gai_strerror(rc));
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rc));
return (NULL);
}
for (ai = air; ai != NULL; ai = ai->ai_next) {
if (ai->ai_family == AF_INET6) {
if (!simta_config_bool("receive.ipv6")) {
continue;
}
} else {
if (!simta_config_bool("receive.ipv4")) {
continue;
}
}
ss = simta_calloc(1, sizeof(struct simta_socket));
if ((rc = getnameinfo(ai->ai_addr, ai->ai_addrlen, host, sizeof(host),
service, sizeof(service), NI_NUMERICHOST)) != 0) {
syslog(LOG_ERR, "Syserror: simta_listen getnameinfo: %s",
gai_strerror(rc));
fprintf(stderr, "getnameinfo: %s\n", gai_strerror(rc));
return (NULL);
}
ss->ss_service = simta_strdup(service);
ss->ss_next = simta_listen_sockets;
simta_listen_sockets = ss;
if ((ss->ss_socket = socket(
ai->ai_family, ai->ai_socktype, ai->ai_protocol)) < 0) {
syslog(LOG_ERR, "Syserror: simta_listen socket %s:%s: %m", host,
service);
perror("socket");
return (NULL);
}
if (ai->ai_family == AF_INET6) {
sockopt = 1;
if (setsockopt(ss->ss_socket, IPPROTO_IPV6, IPV6_V6ONLY, &sockopt,
sizeof(int)) < 0) {
syslog(LOG_ERR, "Syserror: simta_listen setsockopt %s:%s: %m",
host, service);
perror("setsockopt");
return (NULL);
}
}
sockopt = 1;
if (setsockopt(ss->ss_socket, SOL_SOCKET, SO_REUSEADDR, &sockopt,
sizeof(int)) < 0) {
syslog(LOG_ERR, "Syserror: simta_listen setsockopt %s:%s: %m", host,
service);
perror("setsockopt");
return (NULL);
}
if (bind(ss->ss_socket, ai->ai_addr, ai->ai_addrlen) < 0) {
syslog(LOG_ERR, "Syserror: simta_listen bind %s:%s: %m", host,
service);
perror("bind");
return (NULL);
}
if (listen(ss->ss_socket, 4096) < 0) {
syslog(LOG_ERR, "Syserror: simta_listen listen %s:%s: %m", host,
service);
perror("listen");
return (NULL);
}
}
freeaddrinfo(air);
return (ss);
}
int
main(int ac, char **av) {
int c, err = 0;
bool dontrun = false;
bool daemonize = true;
char *prog;
extern int optind;
extern char *optarg;
struct simta_socket *ss;
const char *simta_uname = NULL;
struct passwd *simta_pw;
const char *config_fname = NULL;
const char *config_extra = NULL;
const char *simta_pwd;
const char *simta_file_pid;
#ifdef HAVE_LIBSSL
SSL_CTX *ssl_ctx = NULL;
#endif /* HAVE_LIBSSL */
if ((prog = strrchr(av[ 0 ], '/')) == NULL) {
prog = av[ 0 ];
} else {
prog++;
}
while ((c = getopt(ac, av, "cCDf:u:U:V")) != -1) {
switch (c) {
case 'c': /* check config files */
dontrun = true;
break;
case 'C': /* clean up directories */
simta_filesystem_cleanup++;
break;
case 'D':
daemonize = false;
break;
case 'f':
config_fname = optarg;
break;
case 'u':
simta_uname = optarg;
break;
case 'U':
config_extra = optarg;
break;
case 'V':
printf("%s\n", version);
exit(SIMTA_EXIT_OK);
default:
err++;
}
}
if (err || optind != ac) {
fprintf(stderr, "Usage:\t%s", prog);
fprintf(stderr, " [ -cCdV ]");
fprintf(stderr, " [ -f config-file ]");
fprintf(stderr, " [ -u user ]");
fprintf(stderr, " [ -U ucl-config-string ]");
fprintf(stderr, "\n");
exit(SIMTA_EXIT_ERROR);
}
if (simta_gettimeofday(NULL) == SIMTA_ERR) {
exit(SIMTA_EXIT_ERROR);
}
simta_openlog(false, LOG_PERROR);
if (simta_read_config(config_fname, config_extra) != SIMTA_OK) {
exit(SIMTA_EXIT_ERROR);
}
#ifdef HAVE_LIBSSL
if (simta_config_bool("receive.tls.enabled")) {
/* Test whether our SSL config is usable */
if ((ssl_ctx = tls_server_setup()) == NULL) {
syslog(LOG_ERR, "Liberror: tls_server_setup: %s",
ERR_error_string(ERR_get_error(), NULL));
exit(SIMTA_EXIT_ERROR);
}
SSL_CTX_free(ssl_ctx);
}
#endif /* HAVE_LIBSSL */
#ifdef HAVE_LIBSASL
if (simta_config_bool("receive.auth.authn.enabled") &&
!simta_config_bool("receive.auth.authn.honeypot")) {
if (simta_sasl_init() != SIMTA_OK) {
exit(SIMTA_EXIT_ERROR);
}
}
#endif /* HAVE_LIBSASL */
/* ignore SIGPIPE */
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = SIG_IGN;
if (sigaction(SIGPIPE, &sa, NULL) < 0) {
syslog(LOG_ERR, "Syserror: sigaction: %m");
exit(SIMTA_EXIT_ERROR);
}
simta_pwd = simta_config_str("core.base_dir");
if (chdir(simta_pwd) < 0) {
perror(simta_pwd);
exit(SIMTA_EXIT_ERROR);
}
if (dontrun) {
simta_dump_config();
exit(SIMTA_EXIT_OK);
}
/* if we're not a filesystem cleaner, open smtp service */
if (simta_filesystem_cleanup == 0) {
if (simta_listen() != 0) {
exit(SIMTA_EXIT_ERROR);
}
}
if (daemonize) {
simta_file_pid = simta_config_str("core.pid_file");
/* open and truncate the pid file */
if ((simta_pidfd = open(simta_file_pid, O_CREAT | O_WRONLY, 0644)) <
0) {
fprintf(stderr, "open %s: ", simta_file_pid);
perror(NULL);
exit(SIMTA_EXIT_ERROR);
}
/* lock simta pid fd */
if (flock(simta_pidfd, LOCK_EX | LOCK_NB) != 0) {
if (errno == EAGAIN) {
/* file locked by a diferent process */
fprintf(stderr, "flock %s: daemon already running\n",
simta_file_pid);
exit(SIMTA_EXIT_ERROR);
} else {
fprintf(stderr, "flock %s:", simta_file_pid);
perror(NULL);
exit(SIMTA_EXIT_ERROR);
}
}
if (ftruncate(simta_pidfd, (off_t)0) < 0) {
perror("ftruncate");
exit(SIMTA_EXIT_ERROR);
}
}
if (simta_uname == NULL) {
simta_uname = simta_config_str("core.user");
}
if (simta_uname && (strlen(simta_uname) > 0)) {
/* get our user info from /etc/passwd */
if ((simta_pw = getpwnam(simta_uname)) == NULL) {
fprintf(stderr, "getpwnam %s: user not found\n", simta_uname);
exit(SIMTA_EXIT_ERROR);
}
/* set our initgroups */
if (initgroups(simta_pw->pw_name, 0) != 0) {
perror("setuid");
exit(SIMTA_EXIT_ERROR);
}
/* set our gid */
if (setgid(simta_pw->pw_gid) != 0) {
perror("setgid");
exit(SIMTA_EXIT_ERROR);
}
/* set our uid */
if (setuid(simta_pw->pw_uid) != 0) {
perror("setuid");
exit(SIMTA_EXIT_ERROR);
}
#ifdef __linux__
/* we're debugging under linux */
if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) != 0) {
perror("prctl");
exit(SIMTA_EXIT_ERROR);
}
#endif /* __linux__ */
}
if (simta_filesystem_cleanup) {
exit(simta_wait_for_child(PROCESS_CLEANUP));
} else if (simta_wait_for_child(PROCESS_CLEANUP) != 0) {
fprintf(stderr, "simta cleanup error, please check the log\n");
exit(SIMTA_EXIT_ERROR);
}
/*
* Disassociate from controlling tty.
*/
if (daemonize) {
closelog();
switch (fork()) {
case 0:
if (setsid() < 0) {
perror("setsid");
exit(SIMTA_EXIT_ERROR);
}
int i, dt = getdtablesize();
for (i = 0; i < dt; i++) {
/* keep sockets & simta_pidfd open */
for (ss = simta_listen_sockets; ss != NULL; ss = ss->ss_next) {
if (i == ss->ss_socket) {
break;
}
}
if (ss != NULL) {
continue;
}
if (i == simta_pidfd) {
continue;
}
close(i);
}
if ((i = open("/", O_RDONLY, 0)) == 0) {
dup2(i, 1);
dup2(i, 2);
}
break;
case -1:
perror("fork");
exit(SIMTA_EXIT_ERROR);
default:
exit(SIMTA_EXIT_OK);
}
}
/* Start logging in daemon mode */
if (simta_gettimeofday(NULL) == SIMTA_ERR) {
exit(SIMTA_EXIT_ERROR);
}
if (daemonize) {
simta_openlog(false, 0);
}
/* catch SIGHUP */
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = hup;
sa.sa_flags = SA_RESTART;
if (sigaction(SIGHUP, &sa, &osahup) < 0) {
syslog(LOG_ERR, "Syserror: sigaction: %m");
exit(SIMTA_EXIT_ERROR);
}
/* catch SIGCHLD */
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = chld;
sa.sa_flags = SA_RESTART;
if (sigaction(SIGCHLD, &sa, &osachld) < 0) {
syslog(LOG_ERR, "Syserror: sigaction: %m");
exit(SIMTA_EXIT_ERROR);
}
/* catch SIGUSR1 */
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = usr1;
sa.sa_flags = SA_RESTART;
if (sigaction(SIGUSR1, &sa, &osausr1) < 0) {
syslog(LOG_ERR, "Syserror: sigaction: %m");
exit(SIMTA_EXIT_ERROR);
}
/* catch SIGUSR2 */
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = usr2;
sa.sa_flags = SA_RESTART;
if (sigaction(SIGUSR2, &sa, &osausr2) < 0) {
syslog(LOG_ERR, "Syserror: sigaction: %m");
exit(SIMTA_EXIT_ERROR);
}
if (daemonize) {
syslog(LOG_NOTICE, "Restart: %s", version);
exit(simta_daemonize_server());
} else {
exit(simta_server(false));
}
}
int
simta_daemonize_server(void) {
int pid;
if (simta_gettimeofday(NULL) == SIMTA_ERR) {
return (1);
}
switch (pid = fork()) {
case 0:
/* Fall through */
simta_openlog(true, 0);
return (simta_server(true));
case -1:
syslog(LOG_ERR, "Syserror: simta_child_queue_scheduler fork: %m");
return (-1);
default:
if (simta_proc_add(PROCESS_SERVER, pid) == NULL) {
return (1);
}
syslog(LOG_NOTICE, "Child: launched daemon %d.%ld", pid,
simta_log_ts.tv_sec);
return (0);
}
}
int
set_sleep_time(int *sleep, int val) {
if (val < 0) {
val = 0;
}
if ((*sleep < 0) || (*sleep > val)) {
*sleep = val;
return (0);
}
return (1);
}
int
hq_launch(void) {
struct host_q *hq;
struct timeval tv_now;
int lag;
time_t waited;
if (simta_gettimeofday(&tv_now) == SIMTA_ERR) {
return (1);
}
hq = simta_deliver_q;
hq_deliver_pop(hq);
hq->hq_launches++;
lag = tv_now.tv_sec - hq->hq_next_launch.tv_sec;
if (hq->hq_last_launch.tv_sec != 0) {
waited = tv_now.tv_sec - hq->hq_last_launch.tv_sec;
} else {
waited = 0;
}
if ((hq->hq_wait_longest.tv_sec == 0) ||
(hq->hq_wait_longest.tv_sec < waited)) {
hq->hq_wait_longest.tv_sec = waited;
}
if ((hq->hq_wait_shortest.tv_sec == 0) ||
(hq->hq_wait_shortest.tv_sec > waited)) {
hq->hq_wait_shortest.tv_sec = waited;
}
syslog(LOG_INFO,
"Queue %s: launch %d: "
"wait %lu lag %d last %lu shortest %lu longest %lu "
"total messages %d",
hq->hq_hostname, hq->hq_launches, waited, lag,
hq->hq_wait_last.tv_sec, hq->hq_wait_shortest.tv_sec,
hq->hq_wait_longest.tv_sec, hq->hq_entries);
hq->hq_last_launch.tv_sec = tv_now.tv_sec;
if (hq_deliver_push(hq, &tv_now, NULL) != 0) {
return (1);
}
if (simta_child_q_runner(hq) != 0) {
return (1);
}
return (0);
}
int
simta_server(bool daemon) {
struct timeval tv_launch_limiter = {0, 0};
struct timeval tv_disk = {0, 0};
struct timeval tv_unexpanded = {0, 0};
struct timeval tv_sleep = {0, 0};
struct timeval tv_now;
const char *sleep_reason;
char *error_msg = NULL;
int entries;
int ready;
int sleep_time;
int launched;
FILE *pf;
struct simta_dirp command_dirp;
struct simta_dirp slow_dirp;
int fd_max;
fd_set fdset;
struct simta_socket *ss;
struct connection_info **c;
struct connection_info *remove;
memset(&command_dirp, 0, sizeof(struct simta_dirp));
command_dirp.sd_dir = simta_dir_command;
memset(&slow_dirp, 0, sizeof(struct simta_dirp));
slow_dirp.sd_dir = simta_dir_slow;
if (daemon) {
if ((pf = fdopen(simta_pidfd, "w")) == NULL) {
syslog(LOG_ERR, "Syserror: simta_server fdopen: %m");
exit(SIMTA_EXIT_ERROR);
}
fprintf(pf, "%d\n", (int)getpid());
if (fflush(pf) != 0) {
syslog(LOG_ERR, "Syserror: simta_server fflush: %m");
exit(SIMTA_EXIT_ERROR);
}
}
simta_process_type = PROCESS_SERVER;
if (simta_gettimeofday(&tv_now) == SIMTA_ERR) {
exit(SIMTA_EXIT_ERROR);
}
/* main daemon loop */
simta_debuglog(1, "Daemon: start");
for (;;) {
/* LOCAL RUNNER */
/* CLEAN CHILD PROCESSES */
/* COMMAND DISK */
/* SLOW DISK */
/* QUEUE RUNS */
/* LISTEN */
/* GETTIMEOFDAY */
/* CLEAN THROTTLE TABLE */
/* RECEIVE CHILDREN */
sleep_time = -1;
sleep_reason = "Unset";
if (simsendmail_signal != 0) {
if (simta_q_runner_local <
simta_config_int("deliver.limits.local_runners")) {
simta_debuglog(2, "Daemon: launching local queue runner");
simsendmail_signal = 0;
if (simta_child_q_runner(NULL) != 0) {
goto error;
}
} else {
syslog(LOG_WARNING,
"Daemon: Received signal from simsendmail "
"with no room for more runners, deferring launch");
}
}
if (simta_child_signal != 0) {
if (simta_waitpid(0, NULL, WNOHANG) != 0) {
goto error;
}
}
if ((command_dirp.sd_dirp != NULL) || (command_signal != 0)) {
for (entries = 1;; entries++) {
if (command_dirp.sd_dirp == NULL) {
simta_debuglog(2, "Daemon.command: starting read");
command_signal = 0;
} else {
simta_debuglog(3, "Daemon.command: entry read");
}
daemon_commands(&command_dirp);
if (command_dirp.sd_dirp == NULL) {
simta_debuglog(2, "Daemon.command: finished read");
break;
}
if (entries > 10) {
break;
}
}
}
if (tv_now.tv_sec >= tv_disk.tv_sec) {
for (entries = 1;; entries++) {
if (slow_dirp.sd_dirp == NULL) {
simta_debuglog(2, "Daemon: starting slow queue read");
simta_disk_cycle++;
} else {
simta_debuglog(3, "Daemon: slow queue entry read");
}
if (q_read_dir(&slow_dirp) != 0) {
goto error;
}
if (slow_dirp.sd_dirp == NULL) {
tv_disk.tv_sec = tv_now.tv_sec + 60;
simta_debuglog(2, "Daemon: finished slow queue read");
break;
}
if (entries > 10) {
break;
}
}
}
if (set_sleep_time(&sleep_time, tv_disk.tv_sec - tv_now.tv_sec) == 0) {
sleep_reason = S_DISK;
simta_debuglog(3, "Daemon: set_sleep_time %s: %d", sleep_reason,
sleep_time);
}
/* run unexpanded queue if we have entries, and it is time */
if ((simta_unexpanded_q != NULL) &&
(simta_unexpanded_q->hq_env_head != NULL)) {
if (tv_now.tv_sec >= tv_unexpanded.tv_sec) {
tv_unexpanded.tv_sec = tv_now.tv_sec + 60;
simta_debuglog(2, "Daemon: launching unexpanded queue runner");
if (simta_child_q_runner(simta_unexpanded_q) != 0) {
goto error;
}
}
if (set_sleep_time(&sleep_time,
tv_unexpanded.tv_sec - tv_now.tv_sec) == 0) {
sleep_reason = S_UNEXPANDED;
simta_debuglog(3, "Daemon: set_sleep_time %s: %d", sleep_reason,
sleep_time);
}
}
/* check to see if we need to launch queue runners */
for (launched = 1; simta_deliver_q != NULL; launched++) {
if (tv_launch_limiter.tv_sec > tv_now.tv_sec) {
if (set_sleep_time(&sleep_time,
tv_launch_limiter.tv_sec - tv_now.tv_sec) == 0) {
sleep_reason = S_LIMITER;
simta_debuglog(3, "Daemon: set_sleep_time %s: %d",
sleep_reason, sleep_time);
}
break;
}
if (simta_deliver_q->hq_next_launch.tv_sec > tv_now.tv_sec) {
if (set_sleep_time(&sleep_time,
simta_deliver_q->hq_next_launch.tv_sec -
tv_now.tv_sec) == 0) {
sleep_reason = S_QUEUE;
simta_debuglog(3, "Daemon: set_sleep_time %s: %d",
sleep_reason, sleep_time);
}
simta_debuglog(1, "Daemon: next queue %s %d",
simta_deliver_q->hq_hostname,
(int)(simta_deliver_q->hq_next_launch.tv_sec -
tv_now.tv_sec));
break;
}
if (simta_q_runner_slow >=
simta_config_int("deliver.limits.slow_runners")) {
/* queues need to launch but process limit met */
syslog(LOG_NOTICE,
"Daemon: Queue %s ready with no room for more runners, "
"deferring launch",
simta_deliver_q->hq_hostname);
break;
}
simta_debuglog(2, "Daemon: launching queue runner %s",
simta_deliver_q->hq_hostname);
if (hq_launch() != 0) {
goto error;
}
if (launched % 10 == 0) {
syslog(LOG_WARNING,
"Daemon: launched 10 queue runners, sleeping for 1 "
"second");
tv_launch_limiter.tv_sec = tv_now.tv_sec + 1;
}
}
if (command_dirp.sd_dirp != NULL) {
simta_debuglog(2, "Daemon: reading commands");
sleep_time = 0;
sleep_reason = "reading commands";
}
if ((simsendmail_signal != 0) &&
(simta_q_runner_local <
simta_config_int("deliver.limits.local_runners"))) {
simta_debuglog(2, "Daemon: simsendmail signal");
sleep_time = 0;
sleep_reason = "simsendmail signal";
}
if (simta_child_signal != 0) {
simta_debuglog(2, "Daemon: child signal");
sleep_time = 0;
sleep_reason = "child signal";
}
if (sleep_time < 0) {
sleep_time = 0;
}
if (simta_listen_sockets == NULL) {
if (sleep_time > 0) {
simta_debuglog(
1, "Daemon: sleeping %d: %s", sleep_time, sleep_reason);
sleep((unsigned int)sleep_time);
}
if (simta_gettimeofday(&tv_now) == SIMTA_ERR) {
goto error;
}
continue;
}
if (sleep_time > 0) {
tv_sleep.tv_sec = sleep_time;
} else {
tv_sleep.tv_sec = 0;
}
tv_sleep.tv_usec = 0;
FD_ZERO(&fdset);
fd_max = 0;
for (ss = simta_listen_sockets; ss != NULL; ss = ss->ss_next) {
FD_SET(ss->ss_socket, &fdset);
fd_max = MAX(fd_max, ss->ss_socket);
}
simta_debuglog(
1, "Daemon: selecting %ld: %s", tv_sleep.tv_sec, sleep_reason);
if ((ready = select(fd_max + 1, &fdset, NULL, NULL, &tv_sleep)) < 0) {
if (errno != EINTR) {
syslog(LOG_ERR, "Syserror: simta_child_smtp_daemon select: %m");
goto error;
}
}
simta_debuglog(2, "Daemon: select over");
if (simta_gettimeofday(&tv_now) == SIMTA_ERR) {
goto error;
}
for (c = &cinfo_stab; *c != NULL;) {
if (((*c)->c_proc_total == 0) &&
timercmp(&((*c)->c_tv), &tv_now, <)) {
remove = *c;
*c = (*c)->c_next;
free(remove);
} else {
c = &((*c)->c_next);
}
}
simta_debuglog(2, "Daemon: %d sockets ready", ready);
if (ready <= 0) {
continue;
}
for (ss = simta_listen_sockets; ss != NULL; ss = ss->ss_next) {
if (FD_ISSET(ss->ss_socket, &fdset)) {
simta_debuglog(2, "Daemon: Connect received");
if (simta_child_receive(ss) != 0) {
goto error;
}
}
}
simta_debuglog(2, "Daemon: done checking sockets");
}
error:
syslog(LOG_NOTICE, "Daemon: Shutdown %s", error_msg ? error_msg : "");
return (1);
}
int
simta_wait_for_child(int child_type) {
int pid;
int status;
const char *p_name;
if (simta_gettimeofday(NULL) == SIMTA_ERR) {
return (1);
}
switch (pid = fork()) {
case -1:
syslog(LOG_ERR, "Syserror: simta_wait_for_child fork: %m");
return (1);
case 0:
simta_openlog(true, 0);
switch (child_type) {
case PROCESS_CLEANUP:
exit(q_cleanup());
case PROCESS_Q_SLOW:
exit(q_runner_dir(simta_dir_slow));
default:
syslog(LOG_ERR,
"Syserror: wait_for_child: child_type out of range: %d",
child_type);
return (1);
}
default:
switch (child_type) {
case PROCESS_CLEANUP:
if (simta_filesystem_cleanup) {
p_name = "filesystem cleaner";
} else {
p_name = "filesystem checker";
}
break;