CitStartedFromConsoleWillExitAfterParsingCommandlineArgs
|
CitFirstForkedWillLoopArroundForkWaitPid
|
CitServerThatDoesTheJobAndMightCrash
o k, i've found the issue.
one had to finish off debconf before starting the deamon:
http://www.calivia.com/bk/debian/debconf
as formorer pointed me to. Many Thanks!
I've attached my sysdep.c, that does all the forking now.
Ig, Should i commit it that way and remove ctdlsvc?
/* * $Id: sysdep.c 4763 2006-12-20 19:04:43Z ajc $ * * Citadel "system dependent" stuff. * See copyright.txt for copyright information. * * Here's where we (hopefully) have most parts of the Citadel server that * would need to be altered to run the server in a non-POSIX environment. * * If we ever port to a different platform and either have multiple * variants of this file or simply load it up with #ifdefs. * */
#include "sysdep.h"
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <ctype.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#include <limits.h>
#include <sys/resource.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/un.h>
#include <string.h>
#include <pwd.h>
#include <errno.h>
#include <stdarg.h>
#include <grp.h>
#ifdef HAVE_PTHREAD_H
#include <pthread.h>
#endif
#include "citadel.h"
#include "server.h"
#include "serv_extensions.h"
#include "sysdep_decls.h"
#include "citserver.h"
#include "support.h"
#include "config.h"
#include "database.h"
#include "housekeeping.h"
#include "tools.h"
#include "serv_crypto.h"
#include "serv_fulltext.h"
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifndef HAVE_SNPRINTF
#include "snprintf.h"
#endif
#ifdef DEBUG_MEMORY_LEAKS
struct igheap {
struct igheap *next;
char file[32];
int line;
void *block;
};
struct igheap *igheap = NULL;
#endif
pthread_mutex_t Critters[MAX_SEMAPHORES]; /* Things needing locking */
pthread_key_t MyConKey; /* TSD key for MyContext() */
int verbosity = DEFAULT_VERBOSITY; /* Logging level */
struct CitContext masterCC;
time_t last_purge = 0; /* Last dead session purge */
static int num_threads = 0; /* Current number of threads */
int num_sessions = 0; /* Current number of sessions */
pthread_t indexer_thread_tid;
pthread_t checkpoint_thread_tid;
int syslog_facility = LOG_DAEMON;
int enable_syslog = 0;
extern int running_as_daemon;
/*
* lprintf() ... Write logging information
*/
void lprintf(enum LogLevel loglevel, const char *format, ...) {
va_list arg_ptr;
if (enable_syslog) {
va_start(arg_ptr, format);
vsyslog((syslog_facility | loglevel), format, arg_ptr);
va_end(arg_ptr);
}
/* stderr output code */
if (enable_syslog || running_as_daemon) return;
/* if we run in forground and syslog is disabled, log to terminal */
if (loglevel <= verbosity) {
struct timeval tv;
struct tm tim;
time_t unixtime;
gettimeofday(&tv, NULL);
/* Promote to time_t; types differ on some OSes (like darwin) */
unixtime = tv.tv_sec;
localtime_r(&unixtime, &tim);
if (CC->cs_pid != 0) {
fprintf(stderr,
"%04d/%02d/%02d %2d:%02d:%02d.%06ld [%3d] ",
tim.tm_year + 1900, tim.tm_mon + 1,
tim.tm_mday, tim.tm_hour, tim.tm_min,
tim.tm_sec, (long)tv.tv_usec,
CC->cs_pid);
} else {
fprintf(stderr,
"%04d/%02d/%02d %2d:%02d:%02d.%06ld ",
tim.tm_year + 1900, tim.tm_mon + 1,
tim.tm_mday, tim.tm_hour, tim.tm_min,
tim.tm_sec, (long)tv.tv_usec);
}
va_start(arg_ptr, format);
vfprintf(stderr, format, arg_ptr);
va_end(arg_ptr);
fflush(stderr);
}
}
/*
* Signal handler to shut down the server.
*/
volatile int time_to_die = 0;
volatile int shutdown_and_halt = 0;
static RETSIGTYPE signal_cleanup(int signum) {
lprintf(CTDL_DEBUG, "Caught signal %d; shutting down.\n", signum);
time_to_die = 1;
master_cleanup(signum);
}
/*
* Some initialization stuff...
*/
void init_sysdep(void) {
int i;
sigset_t set;
/* Avoid vulnerabilities related to FD_SETSIZE if we can. */
#ifdef FD_SETSIZE
#ifdef RLIMIT_NOFILE
struct rlimit rl;
getrlimit(RLIMIT_NOFILE, &rl);
rl.rlim_cur = FD_SETSIZE;
rl.rlim_max = FD_SETSIZE;
setrlimit(RLIMIT_NOFILE, &rl);
#endif
#endif
/* If we've got OpenSSL, we're going to use it. */
#ifdef HAVE_OPENSSL
init_ssl();
#endif
/* Set up a bunch of semaphores to be used for critical sections */
for (i=0; i<MAX_SEMAPHORES; ++i) {
pthread_mutex_init(&Critters[i], NULL);
}
/*
* Set up a place to put thread-specific data.
* We only need a single pointer per thread - it points to the
* CitContext structure (in the ContextList linked list) of the
* session to which the calling thread is currently bound.
*/
if (pthread_key_create(&MyConKey, NULL) != 0) {
lprintf(CTDL_CRIT, "Can't create TSD key: %s\n",
strerror(errno));
}
/*
* The action for unexpected signals and exceptions should be to
* call signal_cleanup() to gracefully shut down the server.
*/
sigemptyset(&set);
sigaddset(&set, SIGINT);
sigaddset(&set, SIGQUIT);
sigaddset(&set, SIGHUP);
sigaddset(&set, SIGTERM);
// sigaddset(&set, SIGSEGV); commented out because
// sigaddset(&set, SIGILL); we want core dumps
// sigaddset(&set, SIGBUS);
sigprocmask(SIG_UNBLOCK, &set, NULL);
signal(SIGINT, signal_cleanup);
signal(SIGQUIT, signal_cleanup);
signal(SIGHUP, signal_cleanup);
signal(SIGTERM, signal_cleanup);
// signal(SIGSEGV, signal_cleanup); commented out because
// signal(SIGILL, signal_cleanup); we want core dumps
// signal(SIGBUS, signal_cleanup);
/*
* Do not shut down the server on broken pipe signals, otherwise the
* whole Citadel service would come down whenever a single client
* socket breaks.
*/
signal(SIGPIPE, SIG_IGN);
}
/*
* Obtain a semaphore lock to begin a critical section.
*/
void begin_critical_section(int which_one)
{
/* lprintf(CTDL_DEBUG, "begin_critical_section(%d)\n", which_one); */
/* For all types of critical sections except those listed here,
* ensure nobody ever tries to do a critical section within a
* transaction; this could lead to deadlock.
*/
if ( (which_one != S_FLOORCACHE)
#ifdef DEBUG_MEMORY_LEAKS
&& (which_one != S_DEBUGMEMLEAKS)
#endif
&& (which_one != S_RPLIST)
) {
cdb_check_handles();
}
pthread_mutex_lock(&Critters[which_one]);
}
/*
* Release a semaphore lock to end a critical section.
*/
void end_critical_section(int which_one)
{
pthread_mutex_unlock(&Critters[which_one]);
}
/*
* This is a generic function to set up a master socket for listening on
* a TCP port. The server shuts down if the bind fails.
*
*/
int ig_tcp_server(char *ip_addr, int port_number, int queue_len, char **errormessage)
{
struct sockaddr_in sin;
int s, i;
int actual_queue_len;
actual_queue_len = queue_len;
if (actual_queue_len < 5) actual_queue_len = 5;
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_port = htons((u_short)port_number);
if (ip_addr == NULL) {
sin.sin_addr.s_addr = INADDR_ANY;
}
else {
sin.sin_addr.s_addr = inet_addr(ip_addr);
}
if (sin.sin_addr.s_addr == INADDR_NONE) {
sin.sin_addr.s_addr = INADDR_ANY;
}
s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (s < 0) {
*errormessage = (char*) malloc(SIZ + 1);
snprintf(*errormessage, SIZ,
"citserver: Can't create a socket: %s",
strerror(errno));
lprintf(CTDL_EMERG, "%s\n", *errormessage);
return(-1);
}
i = 1;
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
*errormessage = (char*) malloc(SIZ + 1);
snprintf(*errormessage, SIZ,
"citserver: Can't bind: %s",
strerror(errno));
lprintf(CTDL_EMERG, "%s\n", *errormessage);
close(s);
return(-1);
}
/* set to nonblock - we need this for some obscure situations */
if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
*errormessage = (char*) malloc(SIZ + 1);
snprintf(*errormessage, SIZ,
"citserver: Can't set socket to non-blocking: %s",
strerror(errno));
lprintf(CTDL_EMERG, "%s\n", *errormessage);
close(s);
return(-1);
}
if (listen(s, actual_queue_len) < 0) {
*errormessage = (char*) malloc(SIZ + 1);
snprintf(*errormessage, SIZ,
"citserver: Can't listen: %s",
strerror(errno));
lprintf(CTDL_EMERG, "%s\n", *errormessage);
close(s);
return(-1);
}
return(s);
}
/*
* Create a Unix domain socket and listen on it
*/
int ig_uds_server(char *sockpath, int queue_len, char **errormessage)
{
struct sockaddr_un addr;
int s;
int i;
int actual_queue_len;
actual_queue_len = queue_len;
if (actual_queue_len < 5) actual_queue_len = 5;
i = unlink(sockpath);
if (i != 0) if (errno != ENOENT) {
*errormessage = (char*) malloc(SIZ + 1);
snprintf(*errormessage, SIZ, "citserver: can't unlink %s: %s",
sockpath, strerror(errno));
lprintf(CTDL_EMERG, "%s\n", *errormessage);
return(-1);
}
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
s = socket(AF_UNIX, SOCK_STREAM, 0);
if (s < 0) {
*errormessage = (char*) malloc(SIZ + 1);
snprintf(*errormessage, SIZ,
"citserver: Can't create a socket: %s",
strerror(errno));
lprintf(CTDL_EMERG, "%s\n", *errormessage);
return(-1);
}
if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
*errormessage = (char*) malloc(SIZ + 1);
snprintf(*errormessage, SIZ,
"citserver: Can't bind: %s",
strerror(errno));
lprintf(CTDL_EMERG, "%s\n", *errormessage);
return(-1);
}
/* set to nonblock - we need this for some obscure situations */
if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
*errormessage = (char*) malloc(SIZ + 1);
snprintf(*errormessage, SIZ,
"citserver: Can't set socket to non-blocking: %s",
strerror(errno));
lprintf(CTDL_EMERG, "%s\n", *errormessage);
close(s);
return(-1);
}
if (listen(s, actual_queue_len) < 0) {
*errormessage = (char*) malloc(SIZ + 1);
snprintf(*errormessage, SIZ,
"citserver: Can't listen: %s",
strerror(errno));
lprintf(CTDL_EMERG, "%s\n", *errormessage);
return(-1);
}
chmod(sockpath, 0777);
return(s);
}
/*
* Return a pointer to the CitContext structure bound to the thread which
* called this function. If there's no such binding (for example, if it's
* called by the housekeeper thread) then a generic 'master' CC is returned.
*
* This function is used *VERY* frequently and must be kept small.
*/
struct CitContext *MyContext(void) {
register struct CitContext *c;
return ((c = (struct CitContext *) pthread_getspecific(MyConKey),
c == NULL) ? &masterCC : c
);
}
/*
* Initialize a new context and place it in the list. The session number
* used to be the PID (which is why it's called cs_pid), but that was when we
* had one process per session. Now we just assign them sequentially, starting
* at 1 (don't change it to 0 because masterCC uses 0).
*/
struct CitContext *CreateNewContext(void) {
struct CitContext *me;
static int next_pid = 0;
me = (struct CitContext *) malloc(sizeof(struct CitContext));
if (me == NULL) {
lprintf(CTDL_ALERT, "citserver: can't allocate memory!!\n");
return NULL;
}
memset(me, 0, sizeof(struct CitContext));
/* The new context will be created already in the CON_EXECUTING state
* in order to prevent another thread from grabbing it while it's
* being set up.
*/
me->state = CON_EXECUTING;
/*
* Generate a unique session number and insert this context into
* the list.
*/
begin_critical_section(S_SESSION_TABLE);
me->cs_pid = ++next_pid;
me->prev = NULL;
me->next = ContextList;
ContextList = me;
if (me->next != NULL) {
me->next->prev = me;
}
++num_sessions;
end_critical_section(S_SESSION_TABLE);
return(me);
}
/*
* The following functions implement output buffering. If the kernel supplies
* native TCP buffering (Linux & *BSD), use that; otherwise, emulate it with
* user-space buffering.
*/
#ifdef TCP_CORK
# define HAVE_TCP_BUFFERING
#else
# ifdef TCP_NOPUSH
# define HAVE_TCP_BUFFERING
# define TCP_CORK TCP_NOPUSH
# endif
#endif
#ifdef HAVE_TCP_BUFFERING
static unsigned on = 1, off = 0;
void buffer_output(void) {
struct CitContext *ctx = MyContext();
setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
ctx->buffering = 1;
}
void unbuffer_output(void) {
struct CitContext *ctx = MyContext();
setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
ctx->buffering = 0;
}
void flush_output(void) {
struct CitContext *ctx = MyContext();
setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
}
#else
void buffer_output(void) {
if (CC->buffering == 0) {
CC->buffering = 1;
CC->buffer_len = 0;
CC->output_buffer = malloc(SIZ);
}
}
void flush_output(void) {
if (CC->buffering == 1) {
client_write(CC->output_buffer, CC->buffer_len);
CC->buffer_len = 0;
}
}
void unbuffer_output(void) {
if (CC->buffering == 1) {
CC->buffering = 0;
/* We don't call flush_output because we can't. */
client_write(CC->output_buffer, CC->buffer_len);
CC->buffer_len = 0;
free(CC->output_buffer);
CC->output_buffer = NULL;
}
}
#endif
/*
* client_write() ... Send binary data to the client.
*/
void client_write(char *buf, int nbytes)
{
int bytes_written = 0;
int retval;
#ifndef HAVE_TCP_BUFFERING
int old_buffer_len = 0;
#endif
if (CC->redirect_buffer != NULL) {
if ((CC->redirect_len + nbytes + 2) >= CC->redirect_alloc) {
CC->redirect_alloc = (CC->redirect_alloc * 2) + nbytes;
CC->redirect_buffer = realloc(CC->redirect_buffer,
CC->redirect_alloc);
}
memcpy(&CC->redirect_buffer[CC->redirect_len], buf, nbytes);
CC->redirect_len += nbytes;
CC->redirect_buffer[CC->redirect_len] = 0;
return;
}
#ifndef HAVE_TCP_BUFFERING
/* If we're buffering for later, do that now. */
if (CC->buffering) {
old_buffer_len = CC->buffer_len;
CC->buffer_len += nbytes;
CC->output_buffer = realloc(CC->output_buffer, CC->buffer_len);
memcpy(&CC->output_buffer[old_buffer_len], buf, nbytes);
return;
}
#endif
/* Ok, at this point we're not buffering. Go ahead and write. */
#ifdef HAVE_OPENSSL
if (CC->redirect_ssl) {
client_write_ssl(buf, nbytes);
return;
}
#endif
while (bytes_written < nbytes) {
retval = write(CC->client_socket, &buf[bytes_written],
nbytes - bytes_written);
if (retval < 1) {
lprintf(CTDL_ERR,
"client_write(%d bytes) failed: %s (%d)\n",
nbytes - bytes_written,
strerror(errno), errno);
CC->kill_me = 1;
return;
}
bytes_written = bytes_written + retval;
}
}
/*
* cprintf() ... Send formatted printable data to the client. It is
* implemented in terms of client_write() but remains in
* sysdep.c in case we port to somewhere without va_args...
*/
void cprintf(const char *format, ...) {
va_list arg_ptr;
char buf[1024];
va_start(arg_ptr, format);
if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
buf[sizeof buf - 2] = '\n';
client_write(buf, strlen(buf));
va_end(arg_ptr);
}
/*
* Read data from the client socket.
* Return values are:
* 1 Requested number of bytes has been read.
* 0 Request timed out.
* -1 The socket is broken.
* If the socket breaks, the session will be terminated.
*/
int client_read_to(char *buf, int bytes, int timeout)
{
int len,rlen;
fd_set rfds;
struct timeval tv;
int retval;
#ifdef HAVE_OPENSSL
if (CC->redirect_ssl) {
return (client_read_ssl(buf, bytes, timeout));
}
#endif
len = 0;
while(len<bytes) {
FD_ZERO(&rfds);
FD_SET(CC->client_socket, &rfds);
tv.tv_sec = timeout;
tv.tv_usec = 0;
retval = select( (CC->client_socket)+1,
&rfds, NULL, NULL, &tv);
if (FD_ISSET(CC->client_socket, &rfds) == 0) {
return(0);
}
rlen = read(CC->client_socket, &buf[len], bytes-len);
if (rlen<1) {
/* The socket has been disconnected! */
CC->kill_me = 1;
return(-1);
}
len = len + rlen;
}
return(1);
}
/*
* Read data from the client socket with default timeout.
* (This is implemented in terms of client_read_to() and could be
* justifiably moved out of sysdep.c)
*/
INLINE int client_read(char *buf, int bytes)
{
return(client_read_to(buf, bytes, config.c_sleeping));
}
/*
* client_getln() ... Get a LF-terminated line of text from the client.
* (This is implemented in terms of client_read() and could be
* justifiably moved out of sysdep.c)
*/
int client_getln(char *buf, int bufsize)
{
int i, retval;
/* Read one character at a time.
*/
for (i = 0;;i++) {
retval = client_read(&buf[i], 1);
if (retval != 1 || buf[i] == '\n' || i == (bufsize-1))
break;
}
/* If we got a long line, discard characters until the newline.
*/
if (i == (bufsize-1))
while (buf[i] != '\n' && retval == 1)
retval = client_read(&buf[i], 1);
/* Strip the trailing LF, and the trailing CR if present.
*/
buf[i] = 0;
while ( (strlen(buf) > 0) && ((buf[strlen(buf)-1]==10) || (buf[strlen(buf)-1] == 13)) ) {
buf[strlen(buf)-1] = 0;
}
if (retval < 0) safestrncpy(buf, "000", bufsize);
return(retval);
}
/*
* The system-dependent part of master_cleanup() - close the master socket.
*/
void sysdep_master_cleanup(void) {
struct ServiceFunctionHook *serviceptr;
/*
* close all protocol master sockets
*/
for (serviceptr = ServiceHookTable; serviceptr != NULL;
serviceptr = serviceptr->next ) {
if (serviceptr->tcp_port > 0)
lprintf(CTDL_INFO, "Closing listener on port %d\n",
serviceptr->tcp_port);
if (serviceptr->sockpath != NULL)
lprintf(CTDL_INFO, "Closing listener on '%s'\n",
serviceptr->sockpath);
close(serviceptr->msock);
/* If it's a Unix domain socket, remove the file. */
if (serviceptr->sockpath != NULL) {
unlink(serviceptr->sockpath);
}
}
}
/*
* Terminate another session.
* (This could justifiably be moved out of sysdep.c because it
* no longer does anything that is system-dependent.)
*/
void kill_session(int session_to_kill) {
struct CitContext *ptr;
begin_critical_section(S_SESSION_TABLE);
for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
if (ptr->cs_pid == session_to_kill) {
ptr->kill_me = 1;
}
}
end_critical_section(S_SESSION_TABLE);
}
pid_t current_child;
void graceful_shutdown(int signum) {
kill(current_child, signum);
unlink(file_pid_file);
exit(0);
}
/*
* Start running as a daemon.
*/
void start_daemon(int unused) {
int status = 0;
pid_t child = 0;
FILE *fp;
current_child = 0;
/* Close stdin/stdout/stderr and replace them with /dev/null.
* We don't just call close() because we don't want these fd's
* to be reused for other files.
*/
chdir(ctdl_run_dir);
child = fork();
if (child != 0) {
fp = fopen(file_pid_file, "w");
if (fp != NULL) {
fprintf(fp, "%d\n", child);
fclose(fp);
}
exit(0);
}
signal(SIGHUP, SIG_IGN);
signal(SIGINT, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
setsid();
// umask(0);
freopen("/dev/null", "r", stdin);
freopen("/dev/null", "w", stdout);
freopen("/dev/null", "w", stderr);
do {
current_child = fork();
signal(SIGTERM, graceful_shutdown);
if (current_child < 0) {
perror("fork");
exit(errno);
}
else if (current_child == 0) {
return; /* continue starting citadel. */
}
else {
waitpid(current_child, &status, 0);
}
} while (status != 0);
unlink(file_pid_file);
exit(0);
}
/*
* Generic routine to convert a login name to a full name (gecos)
* Returns nonzero if a conversion took place
*/
int convert_login(char NameToConvert[]) {
struct passwd *pw;
int a;
pw = getpwnam(NameToConvert);
if (pw == NULL) {
return(0);
}
else {
strcpy(NameToConvert, pw->pw_gecos);
for (a=0; a<strlen(NameToConvert); ++a) {
if (NameToConvert[a] == ',') NameToConvert[a] = 0;
}
return(1);
}
}
struct worker_node *worker_list = NULL;
/*
* create a worker thread. this function must always be called from within
* an S_WORKER_LIST critical section!
*/
void create_worker(void) {
int ret;
struct worker_node *n;
pthread_attr_t attr;
n = malloc(sizeof(struct worker_node));
if (n == NULL) {
lprintf(CTDL_EMERG, "can't allocate worker_node, exiting\n");
time_to_die = -1;
return;
}
if ((ret = pthread_attr_init(&attr))) {
lprintf(CTDL_EMERG, "pthread_attr_init: %s\n", strerror(ret));
time_to_die = -1;
return;
}
/* Our per-thread stacks need to be bigger than the default size,
* otherwise the MIME parser crashes on FreeBSD, and the IMAP service
* crashes on 64-bit Linux.
*/
if ((ret = pthread_attr_setstacksize(&attr, THREADSTACKSIZE))) {
lprintf(CTDL_EMERG, "pthread_attr_setstacksize: %s\n",
strerror(ret));
time_to_die = -1;
pthread_attr_destroy(&attr);
return;
}
if ((ret = pthread_create(&n->tid, &attr, worker_thread, NULL) != 0))
{
lprintf(CTDL_ALERT, "Can't create worker thread: %s\n",
strerror(ret));
}
n->next = worker_list;
worker_list = n;
pthread_attr_destroy(&attr);
}
/*
* Create the indexer thread and begin its operation.
* Then create the checkpoint thread and begin its operation.
*/
void create_maintenance_threads(void) {
int ret;
pthread_attr_t attr;
if ((ret = pthread_attr_init(&attr))) {
lprintf(CTDL_EMERG, "pthread_attr_init: %s\n", strerror(ret));
time_to_die = -1;
return;
}
/* Our per-thread stacks need to be bigger than the default size,
* otherwise the MIME parser crashes on FreeBSD, and the IMAP service
* crashes on 64-bit Linux.
*/
if ((ret = pthread_attr_setstacksize(&attr, THREADSTACKSIZE))) {
lprintf(CTDL_EMERG, "pthread_attr_setstacksize: %s\n",
strerror(ret));
time_to_die = -1;
pthread_attr_destroy(&attr);
return;
}
if ((ret = pthread_create(&indexer_thread_tid, &attr, indexer_thread, NULL) != 0)) {
lprintf(CTDL_ALERT, "Can't create thread: %s\n", strerror(ret));
}
if ((ret = pthread_create(&checkpoint_thread_tid, &attr, checkpoint_thread, NULL) != 0)) {
lprintf(CTDL_ALERT, "Can't create thread: %s\n", strerror(ret));
}
pthread_attr_destroy(&attr);
}
/*
* Purge all sessions which have the 'kill_me' flag set.
* This function has code to prevent it from running more than once every
* few seconds, because running it after every single unbind would waste a lot
* of CPU time and keep the context list locked too much. To force it to run
* anyway, set "force" to nonzero.
*
*
* After that's done, we raise the size of the worker thread pool
* if such an action is appropriate.
*/
void dead_session_purge(int force) {
struct CitContext *ptr; /* general-purpose utility pointer */
struct CitContext *rem = NULL; /* list of sessions to be destroyed */
if (force == 0) {
if ( (time(NULL) - last_purge) < 5 ) {
return; /* Too soon, go away */
}
}
time(&last_purge);
begin_critical_section(S_SESSION_TABLE);
for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
if ( (ptr->state == CON_IDLE) && (ptr->kill_me) ) {
/* Remove the session from the active list */
if (ptr->prev) {
ptr->prev->next = ptr->next;
}
else {
ContextList = ptr->next;
}
if (ptr->next) {
ptr->next->prev = ptr->prev;
}
--num_sessions;
/* And put it on our to-be-destroyed list */
ptr->next = rem;
rem = ptr;
}
}
end_critical_section(S_SESSION_TABLE);
/* Now that we no longer have the session list locked, we can take
* our time and destroy any sessions on the to-be-killed list, which
* is allocated privately on this thread's stack.
*/
while (rem != NULL) {
lprintf(CTDL_DEBUG, "Purging session %d\n", rem->cs_pid);
RemoveContext(rem);
ptr = rem;
rem = rem->next;
free(ptr);
}
/* Raise the size of the worker thread pool if necessary. */
if ( (num_sessions > num_threads)
&& (num_threads < config.c_max_workers) ) {
begin_critical_section(S_WORKER_LIST);
create_worker();
end_critical_section(S_WORKER_LIST);
}
}
/*
* masterCC is the context we use when not attached to a session. This
* function initializes it.
*/
void InitializeMasterCC(void) {
memset(&masterCC, 0, sizeof(struct CitContext));
masterCC.internal_pgm = 1;
masterCC.cs_pid = 0;
}
/*
* Bind a thread to a context. (It's inline merely to speed things up.)
*/
INLINE void become_session(struct CitContext *which_con) {
pthread_setspecific(MyConKey, (void *)which_con );
}
/*
* This loop just keeps going and going and going...
*/
void *worker_thread(void *arg) {
int i;
int highest;
struct CitContext *ptr;
struct CitContext *bind_me = NULL;
fd_set readfds;
int retval = 0;
struct CitContext *con= NULL; /* Temporary context pointer */
struct ServiceFunctionHook *serviceptr;
int ssock; /* Descriptor for client socket */
struct timeval tv;
int force_purge = 0;
int m;
num_threads++;
cdb_allocate_tsd();
while (!time_to_die) {
/* make doubly sure we're not holding any stale db handles
* which might cause a deadlock.
*/
cdb_check_handles();
do_select: force_purge = 0;
bind_me = NULL; /* Which session shall we handle? */
/* Initialize the fdset. */
FD_ZERO(&readfds);
highest = 0;
begin_critical_section(S_SESSION_TABLE);
for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
if (ptr->state == CON_IDLE) {
FD_SET(ptr->client_socket, &readfds);
if (ptr->client_socket > highest)
highest = ptr->client_socket;
}
if ((bind_me == NULL) && (ptr->state == CON_READY)) {
bind_me = ptr;
ptr->state = CON_EXECUTING;
}
}
end_critical_section(S_SESSION_TABLE);
if (bind_me) {
goto SKIP_SELECT;
}
/* If we got this far, it means that there are no sessions
* which a previous thread marked for attention, so we go
* ahead and get ready to select().
*/
/* First, add the various master sockets to the fdset. */
for (serviceptr = ServiceHookTable; serviceptr != NULL;
serviceptr = serviceptr->next ) {
m = serviceptr->msock;
FD_SET(m, &readfds);
if (m > highest) {
highest = m;
}
}
if (!time_to_die) {
tv.tv_sec = 1; /* wake up every second if no input */
tv.tv_usec = 0;
retval = select(highest + 1, &readfds, NULL, NULL, &tv);
}
if (time_to_die) return(NULL);
/* Now figure out who made this select() unblock.
* First, check for an error or exit condition.
*/
if (retval < 0) {
if (errno == EBADF) {
lprintf(CTDL_NOTICE, "select() failed: (%s)\n",
strerror(errno));
goto do_select;
}
if (errno != EINTR) {
lprintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
time_to_die = 1;
} else if (!time_to_die)
goto do_select;
}
/* Next, check to see if it's a new client connecting
* on a master socket.
*/
else for (serviceptr = ServiceHookTable; serviceptr != NULL;
serviceptr = serviceptr->next ) {
if (FD_ISSET(serviceptr->msock, &readfds)) {
ssock = accept(serviceptr->msock, NULL, 0);
if (ssock >= 0) {
lprintf(CTDL_DEBUG,
"New client socket %d\n",
ssock);
/* The master socket is non-blocking but the client
* sockets need to be blocking, otherwise certain
* operations barf on FreeBSD. Not a fatal error.
*/
if (fcntl(ssock, F_SETFL, 0) < 0) {
lprintf(CTDL_EMERG,
"citserver: Can't set socket to blocking: %s\n",
strerror(errno));
}
/* New context will be created already
* set up in the CON_EXECUTING state.
*/
con = CreateNewContext();
/* Assign our new socket number to it. */
con->client_socket = ssock;
con->h_command_function =
serviceptr->h_command_function;
con->h_async_function =
serviceptr->h_async_function;
/* Determine whether it's a local socket */
if (serviceptr->sockpath != NULL)
con->is_local_socket = 1;
/* Set the SO_REUSEADDR socket option */
i = 1;
setsockopt(ssock, SOL_SOCKET,
SO_REUSEADDR,
&i, sizeof(i));
become_session(con);
begin_session(con);
serviceptr->h_greeting_function();
become_session(NULL);
con->state = CON_IDLE;
goto do_select;
}
}
}
/* It must be a client socket. Find a context that has data
* waiting on its socket *and* is in the CON_IDLE state. Any
* active sockets other than our chosen one are marked as
* CON_READY so the next thread that comes around can just bind
* to one without having to select() again.
*/
begin_critical_section(S_SESSION_TABLE);
for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
if ( (FD_ISSET(ptr->client_socket, &readfds))
&& (ptr->state != CON_EXECUTING) ) {
ptr->input_waiting = 1;
if (!bind_me) {
bind_me = ptr; /* I choose you! */
bind_me->state = CON_EXECUTING;
}
else {
ptr->state = CON_READY;
}
}
}
end_critical_section(S_SESSION_TABLE);
SKIP_SELECT:
/* We're bound to a session */
if (bind_me != NULL) {
become_session(bind_me);
/* If the client has sent a command, execute it. */
if (CC->input_waiting) {
CC->h_command_function();
CC->input_waiting = 0;
}
/* If there are asynchronous messages waiting and the
* client supports it, do those now */
if ((CC->is_async) && (CC->async_waiting)
&& (CC->h_async_function != NULL)) {
CC->h_async_function();
CC->async_waiting = 0;
}
force_purge = CC->kill_me;
become_session(NULL);
bind_me->state = CON_IDLE;
}
dead_session_purge(force_purge);
do_housekeeping();
check_sched_shutdown();
}
/* If control reaches this point, the server is shutting down */
return(NULL);
}
/*
* SyslogFacility()
* Translate text facility name to syslog.h defined value.
*/
int SyslogFacility(char *name)
{
int i;
struct
{
int facility;
char *name;
} facTbl[] =
{
{ LOG_KERN, "kern" },
{ LOG_USER, "user" },
{ LOG_MAIL, "mail" },
{ LOG_DAEMON, "daemon" },
{ LOG_AUTH, "auth" },
{ LOG_SYSLOG, "syslog" },
{ LOG_LPR, "lpr" },
{ LOG_NEWS, "news" },
{ LOG_UUCP, "uucp" },
{ LOG_LOCAL0, "local0" },
{ LOG_LOCAL1, "local1" },
{ LOG_LOCAL2, "local2" },
{ LOG_LOCAL3, "local3" },
{ LOG_LOCAL4, "local4" },
{ LOG_LOCAL5, "local5" },
{ LOG_LOCAL6, "local6" },
{ LOG_LOCAL7, "local7" },
{ 0, NULL }
};
for(i = 0; facTbl[i].name != NULL; i++) {
if(!strcasecmp(name, facTbl[i].name))
return facTbl[i].facility;
}
enable_syslog = 0;
return LOG_DAEMON;
}
/********** MEM CHEQQER ***********/
#ifdef DEBUG_MEMORY_LEAKS
#undef malloc
#undef realloc
#undef strdup
#undef free
void *tracked_malloc(size_t size, char *file, int line) {
struct igheap *thisheap;
void *block;
block = malloc(size);
if (block == NULL) return(block);
thisheap = malloc(sizeof(struct igheap));
if (thisheap == NULL) {
free(block);
return(NULL);
}
thisheap->block = block;
strcpy(thisheap->file, file);
thisheap->line = line;
begin_critical_section(S_DEBUGMEMLEAKS);
thisheap->next = igheap;
igheap = thisheap;
end_critical_section(S_DEBUGMEMLEAKS);
return(block);
}
void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
struct igheap *thisheap;
void *block;
block = realloc(ptr, size);
if (block == NULL) return(block);
thisheap = malloc(sizeof(struct igheap));
if (thisheap == NULL) {
free(block);
return(NULL);
}
thisheap->block = block;
strcpy(thisheap->file, file);
thisheap->line = line;
begin_critical_section(S_DEBUGMEMLEAKS);
thisheap->next = igheap;
igheap = thisheap;
end_critical_section(S_DEBUGMEMLEAKS);
return(block);
}
void tracked_free(void *ptr) {
struct igheap *thisheap;
struct igheap *trash;
free(ptr);
if (igheap == NULL) return;
begin_critical_section(S_DEBUGMEMLEAKS);
for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
if (thisheap->next != NULL) {
if (thisheap->next->block == ptr) {
trash = thisheap->next;
thisheap->next = thisheap->next->next;
free(trash);
}
}
}
if (igheap->block == ptr) {
trash = igheap;
igheap = igheap->next;
free(trash);
}
end_critical_section(S_DEBUGMEMLEAKS);
}
char *tracked_strdup(const char *s, char *file, int line) {
char *ptr;
if (s == NULL) return(NULL);
ptr = tracked_malloc(strlen(s) + 1, file, line);
if (ptr == NULL) return(NULL);
strncpy(ptr, s, strlen(s));
return(ptr);
}
void dump_heap(void) {
struct igheap *thisheap;
for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
lprintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
thisheap->file, thisheap->line);
}
}
#endif /* DEBUG_MEMORY_LEAKS */
