+++ /dev/null
-/*
- * $Id$
- *
- * Citadel "system dependent" stuff.
- * See COPYING 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 <syslog.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>
-#include <libcitadel.h>
-#include "citadel.h"
-#include "server.h"
-#include "sysdep_decls.h"
-#include "citserver.h"
-#include "support.h"
-#include "config.h"
-#include "database.h"
-#include "housekeeping.h"
-#include "modules/crypto/serv_crypto.h" /* Needed for init_ssl, client_write_ssl, client_read_ssl, destruct_ssl */
-#include "ecrash.h"
-#include "context.h"
-
-#ifdef HAVE_SYS_SELECT_H
-#include <sys/select.h>
-#endif
-
-#ifndef HAVE_SNPRINTF
-#include "snprintf.h"
-#endif
-
-#include "ctdl_module.h"
-#include "threads.h"
-#include "user_ops.h"
-#include "control.h"
-
-
-#ifdef DEBUG_MEMORY_LEAKS
-struct igheap {
- struct igheap *next;
- char file[32];
- int line;
- void *block;
-};
-
-struct igheap *igheap = NULL;
-#endif
-
-
-int verbosity = DEFAULT_VERBOSITY; /* Logging level */
-
-int syslog_facility = LOG_DAEMON;
-int enable_syslog = 0;
-
-
-/*
- * CtdlLogPrintf() ... Write logging information
- */
-void CtdlLogPrintf(enum LogLevel loglevel, const char *format, ...) {
- va_list arg_ptr;
- va_start(arg_ptr, format);
- vCtdlLogPrintf(loglevel, format, arg_ptr);
- va_end(arg_ptr);
-}
-
-void vCtdlLogPrintf(enum LogLevel loglevel, const char *format, va_list arg_ptr)
-{
- char buf[SIZ], buf2[SIZ];
-
- if (enable_syslog) {
- vsyslog((syslog_facility | loglevel), format, 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;
- CitContext *CCC = CC;
-
- gettimeofday(&tv, NULL);
- /* Promote to time_t; types differ on some OSes (like darwin) */
- unixtime = tv.tv_sec;
- localtime_r(&unixtime, &tim);
- if ((CCC != NULL) && (CCC->cs_pid != 0)) {
- sprintf(buf,
- "%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,
- CCC->cs_pid);
- } else {
- sprintf(buf,
- "%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);
- }
- vsnprintf(buf2, SIZ, format, arg_ptr);
-
- fprintf(stderr, "%s%s", buf, buf2);
- fflush(stderr);
- }
-}
-
-
-
-/*
- * Signal handler to shut down the server.
- */
-
-volatile int exit_signal = 0;
-volatile int shutdown_and_halt = 0;
-volatile int restart_server = 0;
-volatile int running_as_daemon = 0;
-
-static RETSIGTYPE signal_cleanup(int signum) {
-
- if (CT)
- CT->signal = signum;
- else
- {
- CtdlLogPrintf(CTDL_DEBUG, "Caught signal %d; shutting down.\n", signum);
- exit_signal = signum;
- }
-}
-
-static RETSIGTYPE signal_exit(int signum) {
- exit(1);
-}
-
-
-
-/*
- * Some initialization stuff...
- */
-void init_sysdep(void) {
- 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 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 (citthread_key_create(&MyConKey, NULL) != 0) {
- CtdlLogPrintf(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(SIGUSR2, signal_exit);
- // 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);
-}
-
-
-
-
-/*
- * 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_ANY) {
- 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));
- CtdlLogPrintf(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));
- CtdlLogPrintf(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));
- CtdlLogPrintf(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));
- CtdlLogPrintf(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;
-#ifdef HAVE_STRUCT_UCRED
- int passcred = 1;
-#endif
-
- actual_queue_len = queue_len;
- if (actual_queue_len < 5) actual_queue_len = 5;
-
- i = unlink(sockpath);
- if ((i != 0) && (errno != ENOENT)) {
- *errormessage = (char*) malloc(SIZ + 1);
- snprintf(*errormessage, SIZ, "citserver: can't unlink %s: %s",
- sockpath, strerror(errno));
- CtdlLogPrintf(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));
- CtdlLogPrintf(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));
- CtdlLogPrintf(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));
- CtdlLogPrintf(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));
- CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
- return(-1);
- }
-
-#ifdef HAVE_STRUCT_UCRED
- setsockopt(s, SOL_SOCKET, SO_PASSCRED, &passcred, sizeof(passcred));
-#endif
-
- chmod(sockpath, S_ISGID|S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
- return(s);
-}
-
-
-
-/*
- * The following functions implement output buffering on operating systems which
- * support it (such as Linux and various BSD flavors).
- */
-#ifndef HAVE_DARWIN
-#ifdef TCP_CORK
-# define HAVE_TCP_BUFFERING
-#else
-# ifdef TCP_NOPUSH
-# define HAVE_TCP_BUFFERING
-# define TCP_CORK TCP_NOPUSH
-# endif
-#endif /* TCP_CORK */
-#endif /* HAVE_DARWIN */
-
-static unsigned on = 1, off = 0;
-
-void buffer_output(void) {
-#ifdef HAVE_TCP_BUFFERING
-#ifdef HAVE_OPENSSL
- if (!CC->redirect_ssl)
-#endif
- setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
-#endif
-}
-
-void unbuffer_output(void) {
-#ifdef HAVE_TCP_BUFFERING
-#ifdef HAVE_OPENSSL
- if (!CC->redirect_ssl)
-#endif
- setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
-#endif
-}
-
-void flush_output(void) {
-#ifdef HAVE_TCP_BUFFERING
- struct CitContext *CCC = CC;
- setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
- setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
-#endif
-}
-
-/*
-static void flush_client_inbuf(void)
-{
- CitContext *CCC=CC;
-
- FlushStrBuf(CCC->ReadBuf);
- CCC->Pos = NULL;
-
-}
-*/
-
-/*
- * client_write() ... Send binary data to the client.
- */
-int client_write(const char *buf, int nbytes)
-{
- int bytes_written = 0;
- int retval;
-#ifndef HAVE_TCP_BUFFERING
- int old_buffer_len = 0;
-#endif
- fd_set wset;
- CitContext *Ctx;
- int fdflags;
-
- if (nbytes < 1) return(0);
-
-// flush_client_inbuf();
- Ctx = CC;
- if (Ctx->redirect_buffer != NULL) {
- StrBufAppendBufPlain(Ctx->redirect_buffer,
- buf, nbytes, 0);
- return 0;
- }
-
-#ifdef HAVE_OPENSSL
- if (Ctx->redirect_ssl) {
- client_write_ssl(buf, nbytes);
- return 0;
- }
-#endif
- if (Ctx->client_socket == -1) return -1;
-
- fdflags = fcntl(Ctx->client_socket, F_GETFL);
-
- while ((bytes_written < nbytes) && (Ctx->client_socket != -1)){
- if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
- FD_ZERO(&wset);
- FD_SET(Ctx->client_socket, &wset);
- if (select(1, NULL, &wset, NULL, NULL) == -1) {
- if (errno == EINTR)
- {
- CtdlLogPrintf(CTDL_DEBUG, "client_write(%d bytes) select() interrupted.\n", nbytes-bytes_written);
- if (CtdlThreadCheckStop()) {
- CC->kill_me = 1;
- return (-1);
- } else {
- /* can't trust fd's and stuff so we need to re-create them */
- continue;
- }
- } else {
- CtdlLogPrintf(CTDL_ERR,
- "client_write(%d bytes) select failed: %s (%d)\n",
- nbytes - bytes_written,
- strerror(errno), errno);
- cit_backtrace();
- Ctx->kill_me = 1;
- return -1;
- }
- }
- }
-
- retval = write(Ctx->client_socket, &buf[bytes_written],
- nbytes - bytes_written);
- if (retval < 1) {
- CtdlLogPrintf(CTDL_ERR,
- "client_write(%d bytes) failed: %s (%d)\n",
- nbytes - bytes_written,
- strerror(errno), errno);
- cit_backtrace();
- // CtdlLogPrintf(CTDL_DEBUG, "Tried to send: %s", &buf[bytes_written]);
- Ctx->kill_me = 1;
- return -1;
- }
- bytes_written = bytes_written + retval;
- }
- return 0;
-}
-
-void cputbuf(const StrBuf *Buf) {
- client_write(ChrPtr(Buf), StrLength(Buf));
-}
-
-
-/*
- * cprintf() Send formatted printable data to the client.
- * Implemented in terms of client_write() so it's technically not sysdep...
- */
-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.
- *
- * sock socket fd to read from
- * buf buffer to read into
- * bytes number of bytes to read
- * timeout Number of seconds to wait before timing out
- *
- * Possible return values:
- * 1 Requested number of bytes has been read.
- * 0 Request timed out.
- * -1 Connection is broken, or other error.
- */
-int client_read_blob(StrBuf *Target, int bytes, int timeout)
-{
- CitContext *CCC=CC;
- const char *Error;
- int retval = 0;
-
-#ifdef HAVE_OPENSSL
- if (CCC->redirect_ssl) {
- retval = client_read_sslblob(Target, bytes, timeout);
- }
- else
-#endif
-
- retval = StrBufReadBLOBBuffered(Target,
- CCC->ReadBuf,
- &CCC->Pos,
- &CCC->client_socket,
- 1,
- bytes,
- O_TERM,
- &Error);
- if (retval < 0) {
- CtdlLogPrintf(CTDL_CRIT,
- "%s failed\n",
- __FUNCTION__);
- return -1;
- }
- else
- {
-#ifdef BIGBAD_IODBG
- int rv = 0;
- char fn [SIZ];
- FILE *fd;
-
- snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
-
- fd = fopen(fn, "a+");
- fprintf(fd, "Read: BufSize: %d BufContent: [",
- StrLength(Target));
- rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
- fprintf(fd, "]\n");
-
-
- fclose(fd);
-#endif
-
- }
- return retval == bytes;
-}
-
-int client_read_to(char *buf, int bytes, int timeout)
-{
- CitContext *CCC=CC;
- int rc;
-
- rc = client_read_blob(CCC->MigrateBuf, bytes, timeout);
- if (rc < 0)
- {
- *buf = '\0';
- return rc;
- }
- else
- {
- memcpy(buf,
- ChrPtr(CCC->MigrateBuf),
- StrLength(CCC->MigrateBuf) + 1);
- FlushStrBuf(CCC->MigrateBuf);
- return rc;
- }
-}
-
-
-int HaveMoreLinesWaiting(CitContext *CCC)
-{
- if ((CCC->kill_me == 1) || (
- (CCC->Pos == NULL) &&
- (StrLength(CCC->ReadBuf) == 0) &&
- (CCC->client_socket != -1)) )
- return 0;
- else
- 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));
-}
-
-int CtdlClientGetLine(StrBuf *Target)
-{
- CitContext *CCC=CC;
- const char *Error;
- int rc;
-
- FlushStrBuf(Target);
-#ifdef HAVE_OPENSSL
- if (CCC->redirect_ssl) {
-#ifdef BIGBAD_IODBG
- char fn [SIZ];
- FILE *fd;
- int len = 0;
- int rlen = 0;
- int nlen = 0;
- int nrlen = 0;
- const char *pch;
-
- snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
-
- fd = fopen(fn, "a+");
- pch = ChrPtr(CCC->ReadBuf);
- len = StrLength(CCC->ReadBuf);
- if (CCC->Pos != NULL)
- rlen = CC->Pos - pch;
- else
- rlen = 0;
-
-/* fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
- len, rlen, pch);
-*/
- fprintf(fd, "\n\n\nSSL1: BufSize: %d BufPos: %d \n_____________________\n",
- len, rlen);
-#endif
- rc = client_readline_sslbuffer(Target,
- CCC->ReadBuf,
- &CCC->Pos,
- 1);
-#ifdef BIGBAD_IODBG
- pch = ChrPtr(CCC->ReadBuf);
- nlen = StrLength(CCC->ReadBuf);
- if (CCC->Pos != NULL)
- nrlen = CC->Pos - pch;
- else
- nrlen = 0;
-/*
- fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
- len, nlen, rlen, nrlen, pch);
-*/
- fprintf(fd, "\n\n\nSSL2: BufSize: was: %d is: %d BufPos: was: %d is: %d \n",
- len, nlen, rlen, nrlen);
-
- fprintf(fd, "SSL3: Read: BufSize: %d BufContent: [%s]\n\n*************\n",
- StrLength(Target), ChrPtr(Target));
- fclose(fd);
-
- if (rc < 0)
- CtdlLogPrintf(CTDL_CRIT,
- "%s failed\n",
- __FUNCTION__);
-#endif
- return rc;
- }
- else
-#endif
- {
-#ifdef BIGBAD_IODBG
- char fn [SIZ];
- FILE *fd;
- int len, rlen, nlen, nrlen;
- const char *pch;
-
- snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
-
- fd = fopen(fn, "a+");
- pch = ChrPtr(CCC->ReadBuf);
- len = StrLength(CCC->ReadBuf);
- if (CCC->Pos != NULL)
- rlen = CC->Pos - pch;
- else
- rlen = 0;
-
-/* fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
- len, rlen, pch);
-*/
- fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \n_____________________\n",
- len, rlen);
-#endif
- rc = StrBufTCP_read_buffered_line_fast(Target,
- CCC->ReadBuf,
- &CCC->Pos,
- &CCC->client_socket,
- 5,
- 1,
- &Error);
-
-#ifdef BIGBAD_IODBG
- pch = ChrPtr(CCC->ReadBuf);
- nlen = StrLength(CCC->ReadBuf);
- if (CCC->Pos != NULL)
- nrlen = CC->Pos - pch;
- else
- nrlen = 0;
-/*
- fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
- len, nlen, rlen, nrlen, pch);
-*/
- fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \n",
- len, nlen, rlen, nrlen);
-
- fprintf(fd, "Read: BufSize: %d BufContent: [%s]\n\n*************\n",
- StrLength(Target), ChrPtr(Target));
- fclose(fd);
-
- if ((rc < 0) && (Error != NULL))
- CtdlLogPrintf(CTDL_CRIT,
- "%s failed: %s\n",
- __FUNCTION__,
- Error);
-#endif
- return rc;
- }
-}
-
-
-/*
- * 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;
- CitContext *CCC=CC;
- const char *pCh;
-
- retval = CtdlClientGetLine(CCC->MigrateBuf);
- if (retval < 0)
- return(retval >= 0);
-
-
- i = StrLength(CCC->MigrateBuf);
- pCh = ChrPtr(CCC->MigrateBuf);
- /* Strip the trailing LF, and the trailing CR if present.
- */
- if (bufsize <= i)
- i = bufsize - 1;
- while ( (i > 0)
- && ( (pCh[i - 1]==13)
- || ( pCh[i - 1]==10)) ) {
- i--;
- }
- memcpy(buf, pCh, i);
- buf[i] = 0;
-
- FlushStrBuf(CCC->MigrateBuf);
- if (retval < 0) {
- safestrncpy(&buf[i], "000", bufsize - i);
- }
- return(retval >= 0);
-}
-
-
-/*
- * Cleanup any contexts that are left lying around
- */
-
-
-void close_masters (void)
-{
- struct ServiceFunctionHook *serviceptr;
-
- /*
- * close all protocol master sockets
- */
- for (serviceptr = ServiceHookTable; serviceptr != NULL;
- serviceptr = serviceptr->next ) {
-
- if (serviceptr->tcp_port > 0)
- {
- CtdlLogPrintf(CTDL_INFO, "Closing listener on port %d\n",
- serviceptr->tcp_port);
- serviceptr->tcp_port = 0;
- }
-
- if (serviceptr->sockpath != NULL)
- CtdlLogPrintf(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);
- serviceptr->sockpath = NULL;
- }
- }
-}
-
-
-/*
- * The system-dependent part of master_cleanup() - close the master socket.
- */
-void sysdep_master_cleanup(void) {
-
- close_masters();
-
- context_cleanup();
-
-#ifdef HAVE_OPENSSL
- destruct_ssl();
-#endif
- CtdlDestroyProtoHooks();
- CtdlDestroyDeleteHooks();
- CtdlDestroyXmsgHooks();
- CtdlDestroyNetprocHooks();
- CtdlDestroyUserHooks();
- CtdlDestroyMessageHook();
- CtdlDestroyCleanupHooks();
- CtdlDestroyFixedOutputHooks();
- CtdlDestroySessionHooks();
- CtdlDestroyServiceHook();
- CtdlDestroyRoomHooks();
- #ifdef HAVE_BACKTRACE
-/// eCrash_Uninit();
- #endif
-}
-
-
-
-pid_t current_child;
-void graceful_shutdown(int signum) {
- kill(current_child, signum);
- unlink(file_pid_file);
- exit(0);
-}
-
-int nFireUps = 0;
-int nFireUpsNonRestart = 0;
-pid_t ForkedPid = 1;
-
-/*
- * Start running as a daemon.
- */
-void start_daemon(int unused) {
- int status = 0;
- pid_t child = 0;
- FILE *fp;
- int do_restart = 0;
-
- 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.
- */
- if (chdir(ctdl_run_dir) != 0)
- CtdlLogPrintf(CTDL_EMERG,
- "unable to change into directory [%s]: %s",
- ctdl_run_dir, strerror(errno));
-
- child = fork();
- if (child != 0) {
- exit(0);
- }
-
- signal(SIGHUP, SIG_IGN);
- signal(SIGINT, SIG_IGN);
- signal(SIGQUIT, SIG_IGN);
-
- setsid();
- umask(0);
- if ((freopen("/dev/null", "r", stdin) != stdin) ||
- (freopen("/dev/null", "w", stdout) != stdout) ||
- (freopen("/dev/null", "w", stderr) != stderr))
- CtdlLogPrintf(CTDL_EMERG,
- "unable to reopen stdin/out/err %s",
- strerror(errno));
-
-
- 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 {
- fp = fopen(file_pid_file, "w");
- if (fp != NULL) {
- fprintf(fp, ""F_PID_T"\n", getpid());
- fclose(fp);
- }
- waitpid(current_child, &status, 0);
- }
- do_restart = 0;
- nFireUpsNonRestart = nFireUps;
-
- /* Exit code 0 means the watcher should exit */
- if (WIFEXITED(status) && (WEXITSTATUS(status) == CTDLEXIT_SHUTDOWN)) {
- do_restart = 0;
- }
-
- /* Exit code 101-109 means the watcher should exit */
- else if (WIFEXITED(status) && (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109)) {
- do_restart = 0;
- }
-
- /* Any other exit code, or no exit code, means we should restart. */
- else {
- do_restart = 1;
- nFireUps++;
- ForkedPid = current_child;
- }
-
- } while (do_restart);
-
- unlink(file_pid_file);
- exit(WEXITSTATUS(status));
-}
-
-
-
-void checkcrash(void)
-{
- if (nFireUpsNonRestart != nFireUps)
- {
- StrBuf *CrashMail;
-
- CrashMail = NewStrBuf();
- CtdlLogPrintf(CTDL_ALERT, "Posting crash message\n");
- StrBufPrintf(CrashMail,
- " \n"
- " The Citadel server process (citserver) terminated unexpectedly."
- "\n \n"
- " This could be the result of a bug in the server program, or some external "
- "factor.\n \n"
- " You can obtain more information about this by enabling core dumps.\n \n"
- " For more information, please see:\n \n"
- " http://citadel.org/doku.php/faq:mastering_your_os:gdb#how.do.i.make.my.system.produce.core-files"
- "\n \n"
-
- " If you have already done this, the core dump is likely to be found at %score.%d\n"
- ,
- ctdl_run_dir, ForkedPid);
- CtdlAideMessage(ChrPtr(CrashMail), "Citadel server process terminated unexpectedly");
- FreeStrBuf(&CrashMail);
- }
-}
-
-
-/*
- * 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);
- }
-}
-
-
-
-/*
- * This loop just keeps going and going and going...
- */
-/*
- * FIXME:
- * This current implimentation of worker_thread creates a bottle neck in several situations
- * The first thing to remember is that a single thread can handle more than one connection at a time.
- * More threads mean less memory for the system to run in.
- * So for efficiency we want every thread to be doing something useful or waiting in the main loop for
- * something to happen anywhere.
- * This current implimentation requires worker threads to wait in other locations, after it has
- * been committed to a single connection which is very wasteful.
- * As an extreme case consider this:
- * A slow client connects and this slow client sends only one character each second.
- * With this current implimentation a single worker thread is dispatched to handle that connection
- * until such times as the client timeout expires, an error occurs on the socket or the client
- * completes its transmission.
- * THIS IS VERY BAD since that thread could have handled a read from many more clients in each one
- * second interval between chars.
- *
- * It is my intention to re-write this code and the associated client_getln, client_read functions
- * to allow any thread to read data on behalf of any connection (context).
- * To do this I intend to have this main loop read chars into a buffer stored in the context.
- * Once the correct criteria for a full buffer is met then we will dispatch a thread to
- * process it.
- * This worker thread loop also needs to be able to handle binary data.
- */
-
-void *worker_thread(void *arg) {
- int highest;
- CitContext *ptr;
- CitContext *bind_me = NULL;
- fd_set readfds;
- int retval = 0;
- struct timeval tv;
- int force_purge = 0;
-
-
- while (!CtdlThreadCheckStop()) {
-
- /* 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) {
- int client_socket;
- client_socket = ptr->client_socket;
- /* Dont select on dead sessions only truly idle ones */
- if ((ptr->state == CON_IDLE) &&
- (CC->kill_me == 0) &&
- (client_socket != -1))
- {
- FD_SET(client_socket, &readfds);
- if (client_socket > highest)
- highest = client_socket;
- }
- if ((bind_me == NULL) && (ptr->state == CON_READY)) {
- bind_me = ptr;
- ptr->state = CON_EXECUTING;
- break;
- }
- if ((bind_me == NULL) && (ptr->state == CON_GREETING)) {
- bind_me = ptr;
- ptr->state = CON_STARTING;
- break;
- }
- }
- 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().
- */
-
- if (!CtdlThreadCheckStop()) {
- tv.tv_sec = 1; /* wake up every second if no input */
- tv.tv_usec = 0;
- retval = CtdlThreadSelect(highest + 1, &readfds, NULL, NULL, &tv);
- }
- else
- return NULL;
-
- /* Now figure out who made this select() unblock.
- * First, check for an error or exit condition.
- */
- if (retval < 0) {
- if (errno == EBADF) {
- CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
- strerror(errno));
- goto do_select;
- }
- if (errno != EINTR) {
- CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
- CtdlThreadStopAll();
- continue;
- } else {
- CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
- if (CtdlThreadCheckStop()) return(NULL);
- goto do_select;
- }
- }
- else if(retval == 0) {
- if (CtdlThreadCheckStop()) return(NULL);
- }
-
- /* 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) {
- int checkfd = ptr->client_socket;
- if ((checkfd != -1) && (ptr->state == CON_IDLE) ){
- if (FD_ISSET(checkfd, &readfds)) {
- ptr->input_waiting = 1;
- if (!bind_me) {
- bind_me = ptr; /* I choose you! */
- bind_me->state = CON_EXECUTING;
- }
- else {
- ptr->state = CON_READY;
- }
- } else if ((ptr->is_async) && (ptr->async_waiting) && (ptr->h_async_function)) {
- 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 (bind_me->state == CON_STARTING) {
- bind_me->state = CON_EXECUTING;
- begin_session(bind_me);
- bind_me->h_greeting_function();
- }
- /* If the client has sent a command, execute it. */
- if (CC->input_waiting) {
- CC->h_command_function();
-
- while (HaveMoreLinesWaiting(CC))
- 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();
- }
- /* If control reaches this point, the server is shutting down */
- return(NULL);
-}
-
-
-
-
-/*
- * A function to handle selecting on master sockets.
- * In other words it handles new connections.
- * It is a thread.
- */
-void *select_on_master (void *arg)
-{
- struct ServiceFunctionHook *serviceptr;
- fd_set master_fds;
- int highest;
- struct timeval tv;
- int ssock; /* Descriptor for client socket */
- CitContext *con= NULL; /* Temporary context pointer */
- int m;
- int i;
- int retval;
-
- while (!CtdlThreadCheckStop()) {
- /* Initialize the fdset. */
- FD_ZERO(&master_fds);
- highest = 0;
-
- /* First, add the various master sockets to the fdset. */
- for (serviceptr = ServiceHookTable; serviceptr != NULL;
- serviceptr = serviceptr->next ) {
- m = serviceptr->msock;
- FD_SET(m, &master_fds);
- if (m > highest) {
- highest = m;
- }
- }
-
- if (!CtdlThreadCheckStop()) {
- tv.tv_sec = 60; /* wake up every second if no input */
- tv.tv_usec = 0;
- retval = CtdlThreadSelect(highest + 1, &master_fds, NULL, NULL, &tv);
- }
- else
- return NULL;
-
- /* Now figure out who made this select() unblock.
- * First, check for an error or exit condition.
- */
- if (retval < 0) {
- if (errno == EBADF) {
- CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
- strerror(errno));
- continue;
- }
- if (errno != EINTR) {
- CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
- CtdlThreadStopAll();
- } else {
- CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
- if (CtdlThreadCheckStop()) return(NULL);
- continue;
- }
- }
- else if(retval == 0) {
- if (CtdlThreadCheckStop()) return(NULL);
- continue;
- }
- /* 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, &master_fds)) {
- ssock = accept(serviceptr->msock, NULL, 0);
- if (ssock >= 0) {
- CtdlLogPrintf(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) {
- CtdlLogPrintf(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;
- con->h_greeting_function = serviceptr->h_greeting_function;
- con->ServiceName =
- serviceptr->ServiceName;
-
- /* 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));
-
- con->state = CON_GREETING;
-
- retval--;
- if (retval == 0)
- break;
- }
- }
- }
- }
- 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) {
- CtdlLogPrintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
- thisheap->file, thisheap->line);
- }
-}
-
-#endif /* DEBUG_MEMORY_LEAKS */
projects / citadel.git / blobdiff