Back to index

citadel  8.12
Defines | Functions | Variables
sysdep.c File Reference
#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>
#include <time.h>
#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"
#include "ecrash.h"
#include "context.h"
#include "snprintf.h"
#include "ctdl_module.h"
#include "threads.h"
#include "user_ops.h"
#include "control.h"

Go to the source code of this file.

Defines

#define SHOW_ME_VAPPEND_PRINTF

Functions

static RETSIGTYPE signal_cleanup (int signum)
static RETSIGTYPE signal_exit (int signum)
void init_sysdep (void)
int ctdl_tcp_server (char *ip_addr, int port_number, int queue_len, char *errormessage)
int ctdl_uds_server (char *sockpath, int queue_len, char *errormessage)
void buffer_output (void)
void unbuffer_output (void)
void flush_output (void)
void client_close (void)
int client_write (const char *buf, int nbytes)
void cputbuf (const StrBuf *Buf)
void cprintf (const char *format,...)
int client_read_blob (StrBuf *Target, int bytes, int timeout)
void client_set_inbound_buf (long N)
int client_read_random_blob (StrBuf *Target, int timeout)
int client_read_to (char *buf, int bytes, int timeout)
int HaveMoreLinesWaiting (CitContext *CCC)
INLINE int client_read (char *buf, int bytes)
int CtdlClientGetLine (StrBuf *Target)
int client_getln (char *buf, int bufsize)
void close_masters (void)
void sysdep_master_cleanup (void)
void graceful_shutdown (int signum)
void start_daemon (int unused)
void checkcrash (void)
int convert_login (char NameToConvert[])
void * worker_thread (void *blah)
int SyslogFacility (char *name)

Variables

volatile int exit_signal = 0
volatile int shutdown_and_halt = 0
volatile int restart_server = 0
volatile int running_as_daemon = 0
static unsigned on = 1
static unsigned off = 0
pid_t current_child
int nFireUps = 0
int nFireUpsNonRestart = 0
pid_t ForkedPid = 1

Define Documentation

Definition at line 64 of file sysdep.c.


Function Documentation

void buffer_output ( void  )

Definition at line 369 of file sysdep.c.

                         {
#ifdef HAVE_TCP_BUFFERING
#ifdef HAVE_OPENSSL
       if (!CC->redirect_ssl)
#endif
              setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
#endif
}

Here is the caller graph for this function:

void checkcrash ( void  )

Definition at line 1083 of file sysdep.c.

{
       if (nFireUpsNonRestart != nFireUps)
       {
              StrBuf *CrashMail;

              CrashMail = NewStrBuf();
              syslog(LOG_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?id=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);
       }
}

Here is the caller graph for this function:

void client_close ( void  )

Definition at line 410 of file sysdep.c.

                        {
       CitContext *CCC = CC;

       if (!CCC) return;
       if (CCC->client_socket <= 0) return;
       syslog(LOG_DEBUG, "Closing socket %d", CCC->client_socket);

       close(CCC->client_socket);
       CCC->client_socket = -1 ;
}

Here is the caller graph for this function:

int client_getln ( char *  buf,
int  bufsize 
)

Definition at line 880 of file sysdep.c.

{
       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);
}

Here is the call graph for this function:

Here is the caller graph for this function:

INLINE int client_read ( char *  buf,
int  bytes 
)

Definition at line 748 of file sysdep.c.

{
       return(client_read_to(buf, bytes, config.c_sleeping));
}

Here is the call graph for this function:

Here is the caller graph for this function:

int client_read_blob ( StrBuf *  Target,
int  bytes,
int  timeout 
)

Definition at line 560 of file sysdep.c.

{
       CitContext *CCC=CC;
       const char *Error;
       int retval = 0;

#ifdef HAVE_OPENSSL
       if (CCC->redirect_ssl) {
#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, "Reading BLOB: BufSize: %d ",
                     bytes);
              rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
              fprintf(fd, "]\n");
              
                     
              fclose(fd);
#endif
              retval = client_read_sslblob(Target, bytes, timeout);
              if (retval < 0) {
                     syslog(LOG_CRIT, "client_read_blob() failed");
              }
#ifdef BIGBAD_IODBG
              snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
              
              fd = fopen(fn, "a+");
              fprintf(fd, "Read: %d BufContent: [",
                     StrLength(Target));
              rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
              fprintf(fd, "]\n");
              
              
              fclose(fd);
#endif
       }
       else 
#endif
       {
#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, "Reading BLOB: BufSize: %d ",
                     bytes);
              rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
              fprintf(fd, "]\n");
              
                     
              fclose(fd);
#endif
              retval = StrBufReadBLOBBuffered(Target, 
                                          CCC->RecvBuf.Buf,
                                          &CCC->RecvBuf.ReadWritePointer,
                                          &CCC->client_socket,
                                          1, 
                                          bytes,
                                          O_TERM,
                                          &Error);
              if (retval < 0) {
                     syslog(LOG_CRIT, "client_read_blob() failed: %s", Error);
                     client_close();
                     return retval;
              }
#ifdef BIGBAD_IODBG
              snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
              
              fd = fopen(fn, "a+");
              fprintf(fd, "Read: %d BufContent: [",
                     StrLength(Target));
              rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
              fprintf(fd, "]\n");
              fclose(fd);
#endif
       }
       return retval;
}

Here is the call graph for this function:

Here is the caller graph for this function:

int client_read_random_blob ( StrBuf *  Target,
int  timeout 
)

Definition at line 659 of file sysdep.c.

{
       CitContext *CCC=CC;
       int rc;

       rc =  client_read_blob(Target, 1, timeout);
       if (rc > 0)
       {
              long len;
              const char *pch;
              
              len = StrLength(CCC->RecvBuf.Buf);
              pch = ChrPtr(CCC->RecvBuf.Buf);

              if (len > 0)
              {
                     if (CCC->RecvBuf.ReadWritePointer != NULL) {
                            len -= CCC->RecvBuf.ReadWritePointer - pch;
                            pch = CCC->RecvBuf.ReadWritePointer;
                     }
                     StrBufAppendBufPlain(Target, pch, len, 0);
                     FlushStrBuf(CCC->RecvBuf.Buf);
                     CCC->RecvBuf.ReadWritePointer = NULL;
#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 StrLength(Target);
              }
              return rc;
       }
       else
              return rc;
}

Here is the call graph for this function:

Here is the caller graph for this function:

int client_read_to ( char *  buf,
int  bytes,
int  timeout 
)

Definition at line 709 of file sysdep.c.

{
       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;
       }
}

Here is the call graph for this function:

Here is the caller graph for this function:

void client_set_inbound_buf ( long  N)

Definition at line 652 of file sysdep.c.

{
       CitContext *CCC=CC;
       FlushStrBuf(CCC->RecvBuf.Buf);
       ReAdjustEmptyBuf(CCC->RecvBuf.Buf, N * SIZ, N * SIZ);
}

Here is the caller graph for this function:

int client_write ( const char *  buf,
int  nbytes 
)

Definition at line 427 of file sysdep.c.

{
       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);

       Ctx = CC;

#ifdef BIGBAD_IODBG
       {
              int rv = 0;
              char fn [SIZ];
              FILE *fd;
              
              snprintf(fn, SIZ, "/tmp/foolog_%s.%d", Ctx->ServiceName, Ctx->cs_pid);
              
              fd = fopen(fn, "a+");
              if (fd)
              {
                  fprintf(fd, "Sending: BufSize: %d BufContent: [",
                         nbytes);
                  rv = fwrite(buf, nbytes, 1, fd);
                  fprintf(fd, "]\n");
                  fclose(fd);
              }
       }
#endif
//     flush_client_inbuf();
       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)
                            {
                                   syslog(LOG_DEBUG, "client_write(%d bytes) select() interrupted.",
                                          nbytes-bytes_written
                                   );
                                   if (server_shutting_down) {
                                          CC->kill_me = KILLME_SELECT_INTERRUPTED;
                                          return (-1);
                                   } else {
                                          /* can't trust fd's and stuff so we need to re-create them */
                                          continue;
                                   }
                            } else {
                                   syslog(LOG_ERR,
                                          "client_write(%d bytes) select failed: %s (%d)",
                                          nbytes - bytes_written,
                                          strerror(errno), errno
                                   );
                                   cit_backtrace();
                                   client_close();
                                   Ctx->kill_me = KILLME_SELECT_FAILED;
                                   return -1;
                            }
                     }
              }

              retval = write(Ctx->client_socket, &buf[bytes_written], nbytes - bytes_written);
              if (retval < 1) {
                     syslog(LOG_ERR,
                            "client_write(%d bytes) failed: %s (%d)",
                            nbytes - bytes_written,
                            strerror(errno), errno
                     );
                     cit_backtrace();
                     client_close();
                     Ctx->kill_me = KILLME_WRITE_FAILED;
                     return -1;
              }
              bytes_written = bytes_written + retval;
       }
       return 0;
}

Here is the call graph for this function:

Here is the caller graph for this function:

void close_masters ( void  )

Definition at line 918 of file sysdep.c.

{
       struct ServiceFunctionHook *serviceptr;
       
       /*
        * close all protocol master sockets
        */
       for (serviceptr = ServiceHookTable; serviceptr != NULL;
           serviceptr = serviceptr->next ) {

              if (serviceptr->tcp_port > 0)
              {
                     syslog(LOG_INFO, "Closing %d listener on port %d\n",
                            serviceptr->msock,
                            serviceptr->tcp_port);
                     serviceptr->tcp_port = 0;
              }
              
              if (serviceptr->sockpath != NULL)
                     syslog(LOG_INFO, "Closing %d listener on '%s'\n",
                            serviceptr->msock,
                            serviceptr->sockpath);
                if (serviceptr->msock != -1)
                     close(serviceptr->msock);
              /* If it's a Unix domain socket, remove the file. */
              if (serviceptr->sockpath != NULL) {
                     unlink(serviceptr->sockpath);
                     serviceptr->sockpath = NULL;
              }
       }
}

Here is the caller graph for this function:

int convert_login ( char  NameToConvert[])

Definition at line 1115 of file sysdep.c.

                                        {
       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);
       }
}
void cprintf ( const char *  format,
  ... 
)

Definition at line 535 of file sysdep.c.

                                      {   
       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);
}   

Here is the call graph for this function:

void cputbuf ( const StrBuf *  Buf)

Definition at line 526 of file sysdep.c.

                                {   
       client_write(ChrPtr(Buf), StrLength(Buf)); 
}   

Here is the call graph for this function:

Here is the caller graph for this function:

int ctdl_tcp_server ( char *  ip_addr,
int  port_number,
int  queue_len,
char *  errormessage 
)

Definition at line 177 of file sysdep.c.

{
       struct protoent *p;
       struct sockaddr_in6 sin6;
       struct sockaddr_in sin4;
       int s, i, b;
       int ip_version = 6;

       memset(&sin6, 0, sizeof(sin6));
       memset(&sin4, 0, sizeof(sin4));
       sin6.sin6_family = AF_INET6;
       sin4.sin_family = AF_INET;

       if (   (ip_addr == NULL)                                              /* any IPv6 */
              || (IsEmptyStr(ip_addr))
              || (!strcmp(ip_addr, "*"))
       ) {
              ip_version = 6;
              sin6.sin6_addr = in6addr_any;
       }
       else if (!strcmp(ip_addr, "0.0.0.0"))                                        /* any IPv4 */
       {
              ip_version = 4;
              sin4.sin_addr.s_addr = INADDR_ANY;
       }
       else if ((strchr(ip_addr, '.')) && (!strchr(ip_addr, ':')))                  /* specific IPv4 */
       {
              ip_version = 4;
              if (inet_pton(AF_INET, ip_addr, &sin4.sin_addr) <= 0) {
                     snprintf(errormessage, SIZ,
                             "Error binding to [%s] : %s", ip_addr, strerror(errno)
                     );
                     syslog(LOG_ALERT, "%s", errormessage);
                     return (-1);
              }
       }
       else                                                                  /* specific IPv6 */
       {
              ip_version = 6;
              if (inet_pton(AF_INET6, ip_addr, &sin6.sin6_addr) <= 0) {
                     snprintf(errormessage, SIZ,
                             "Error binding to [%s] : %s", ip_addr, strerror(errno)
                     );
                     syslog(LOG_ALERT, "%s", errormessage);
                     return (-1);
              }
       }

       if (port_number == 0) {
              snprintf(errormessage, SIZ, "Can't start: no port number specified.");
              syslog(LOG_ALERT, "%s", errormessage);
              return (-1);
       }
       sin6.sin6_port = htons((u_short) port_number);
       sin4.sin_port = htons((u_short) port_number);

       p = getprotobyname("tcp");

       s = socket( ((ip_version == 6) ? PF_INET6 : PF_INET), SOCK_STREAM, (p->p_proto));
       if (s < 0) {
              snprintf(errormessage, SIZ,
                      "Can't create a listening socket: %s", strerror(errno)
              );
              syslog(LOG_ALERT, "%s", errormessage);
              return (-1);
       }
       /* Set some socket options that make sense. */
       i = 1;
       setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));

       if (ip_version == 6) {
              b = bind(s, (struct sockaddr *) &sin6, sizeof(sin6));
       }
       else {
              b = bind(s, (struct sockaddr *) &sin4, sizeof(sin4));
       }

       if (b < 0) {
              snprintf(errormessage, SIZ,
                      "Can't bind: %s", strerror(errno)
              );
              syslog(LOG_ALERT, "%s", errormessage);
              return (-1);
       }

       fcntl(s, F_SETFL, O_NONBLOCK);

       if (listen(s, ((queue_len >= 5) ? queue_len : 5) ) < 0) {
              snprintf(errormessage, SIZ,
                      "Can't listen: %s", strerror(errno)
              );
              syslog(LOG_ALERT, "%s", errormessage);
              return (-1);
       }
       return (s);
}

Here is the call graph for this function:

Here is the caller graph for this function:

int ctdl_uds_server ( char *  sockpath,
int  queue_len,
char *  errormessage 
)

Definition at line 281 of file sysdep.c.

{
       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)) {
              snprintf(errormessage, SIZ, "citserver: can't unlink %s: %s",
                     sockpath, strerror(errno)
              );
              syslog(LOG_EMERG, "%s", 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) {
              snprintf(errormessage, SIZ, 
                      "citserver: Can't create a socket: %s",
                      strerror(errno));
              syslog(LOG_EMERG, "%s", errormessage);
              return(-1);
       }

       if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
              snprintf(errormessage, SIZ, 
                      "citserver: Can't bind: %s",
                      strerror(errno));
              syslog(LOG_EMERG, "%s", errormessage);
              return(-1);
       }

       /* set to nonblock - we need this for some obscure situations */
       if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
              snprintf(errormessage, SIZ, 
                      "citserver: Can't set socket to non-blocking: %s",
                      strerror(errno));
              syslog(LOG_EMERG, "%s", errormessage);
              close(s);
              return(-1);
       }

       if (listen(s, actual_queue_len) < 0) {
              snprintf(errormessage, SIZ, 
                      "citserver: Can't listen: %s",
                      strerror(errno));
              syslog(LOG_EMERG, "%s", 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);
}

Here is the call graph for this function:

Here is the caller graph for this function:

int CtdlClientGetLine ( StrBuf *  Target)

Definition at line 753 of file sysdep.c.

{
       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->RecvBuf.Buf);
              len = StrLength(CCC->RecvBuf.Buf);
              if (CCC->RecvBuf.ReadWritePointer != NULL)
                     rlen = CCC->RecvBuf.ReadWritePointer - 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->RecvBuf.Buf,
                                          &CCC->RecvBuf.ReadWritePointer,
                                          1);
#ifdef BIGBAD_IODBG
                pch = ChrPtr(CCC->RecvBuf.Buf);
                nlen = StrLength(CCC->RecvBuf.Buf);
                if (CCC->RecvBuf.ReadWritePointer != NULL)
                        nrlen = CCC->RecvBuf.ReadWritePointer - 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) {
                     syslog(LOG_CRIT, "CtdlClientGetLine() failed");
              }
#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->RecvBuf.Buf);
              len = StrLength(CCC->RecvBuf.Buf);
              if (CCC->RecvBuf.ReadWritePointer != NULL)
                     rlen = CCC->RecvBuf.ReadWritePointer - 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->RecvBuf.Buf,
                                                 &CCC->RecvBuf.ReadWritePointer,
                                                 &CCC->client_socket,
                                                 5,
                                                 1,
                                                 &Error);

#ifdef BIGBAD_IODBG
                pch = ChrPtr(CCC->RecvBuf.Buf);
                nlen = StrLength(CCC->RecvBuf.Buf);
                if (CCC->RecvBuf.ReadWritePointer != NULL)
                        nrlen = CCC->RecvBuf.ReadWritePointer - 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)) {
                     syslog(LOG_CRIT, "CtdlClientGetLine() failed: %s", Error);
              }
#endif
              return rc;
       }
}

Here is the call graph for this function:

Here is the caller graph for this function:

void flush_output ( void  )

Definition at line 387 of file sysdep.c.

                        {
#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
}

Here is the caller graph for this function:

void graceful_shutdown ( int  signum)

Definition at line 984 of file sysdep.c.

                                   {
       kill(current_child, signum);
       unlink(file_pid_file);
       exit(0);
}

Here is the caller graph for this function:

Definition at line 731 of file sysdep.c.

{
       if ((CCC->kill_me != 0) ||
           ( (CCC->RecvBuf.ReadWritePointer == NULL) && 
             (StrLength(CCC->RecvBuf.Buf) == 0) && 
             (CCC->client_socket != -1)) )
              return 0;
       else
              return 1;
}

Here is the caller graph for this function:

void init_sysdep ( void  )

Definition at line 116 of file sysdep.c.

                       {
       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 (pthread_key_create(&MyConKey, NULL) != 0) {
              syslog(LOG_CRIT, "Can't create TSD key: %s", strerror(errno));
       }

       /*
        * Interript, hangup, and terminate signals should cause the server
        * to gracefully clean up and shut down.
        */
       sigemptyset(&set);
       sigaddset(&set, SIGINT);
       sigaddset(&set, SIGHUP);
       sigaddset(&set, SIGTERM);
       sigprocmask(SIG_UNBLOCK, &set, NULL);

       signal(SIGINT, signal_cleanup);
       signal(SIGHUP, signal_cleanup);
       signal(SIGTERM, signal_cleanup);
       signal(SIGUSR2, signal_exit);

       /*
        * 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);
}

Here is the call graph for this function:

Here is the caller graph for this function:

static RETSIGTYPE signal_cleanup ( int  signum) [static]

Definition at line 101 of file sysdep.c.

                                             {
       syslog(LOG_DEBUG, "Caught signal %d; shutting down.", signum);
       exit_signal = signum;
       server_shutting_down = 1;
}

Here is the caller graph for this function:

static RETSIGTYPE signal_exit ( int  signum) [static]

Definition at line 107 of file sysdep.c.

                                          {
       exit(1);
}

Here is the caller graph for this function:

void start_daemon ( int  unused)

Definition at line 997 of file sysdep.c.

                              {
       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)
              syslog(LOG_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))
              syslog(LOG_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);
              }

              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));
}

Here is the call graph for this function:

Here is the caller graph for this function:

void sysdep_master_cleanup ( void  )

Definition at line 954 of file sysdep.c.

Here is the call graph for this function:

Here is the caller graph for this function:

int SyslogFacility ( char *  name)

Definition at line 1380 of file sysdep.c.

{
       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;
       }
       return LOG_DAEMON;
}

Here is the caller graph for this function:

void unbuffer_output ( void  )

Definition at line 378 of file sysdep.c.

                           {
#ifdef HAVE_TCP_BUFFERING
#ifdef HAVE_OPENSSL
       if (!CC->redirect_ssl)
#endif
              setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
#endif
}

Here is the caller graph for this function:

void* worker_thread ( void *  blah)

Definition at line 1137 of file sysdep.c.

                                {
       int highest;
       CitContext *ptr;
       CitContext *bind_me = NULL;
       fd_set readfds;
       int retval = 0;
       struct timeval tv;
       int force_purge = 0;
       struct ServiceFunctionHook *serviceptr;
       int ssock;                      /* Descriptor for client socket */
       CitContext *con = NULL;         /* Temporary context pointer */
       int i;

       ++num_workers;

       while (!server_shutting_down) {

              /* 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;

              /* First, add the various master sockets to the fdset. */
              for (serviceptr = ServiceHookTable; serviceptr != NULL; serviceptr = serviceptr->next ) {
                     FD_SET(serviceptr->msock, &readfds);
                     if (serviceptr->msock > highest) {
                            highest = serviceptr->msock;
                     }
              }

              /* Next, add all of the client sockets. */
              begin_critical_section(S_SESSION_TABLE);
              for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
                     if ((ptr->state == CON_SYS) && (ptr->client_socket == 0))
                         continue;

                     /* Don't select on dead sessions, only truly idle ones */
                     if (   (ptr->state == CON_IDLE)
                            && (ptr->kill_me == 0)
                            && (ptr->client_socket > 0)
                     ) {
                            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;
                            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 (!server_shutting_down) {
                     tv.tv_sec = 1;              /* wake up every second if no input */
                     tv.tv_usec = 0;
                     retval = select(highest + 1, &readfds, NULL, NULL, &tv);
              }
              else {
                     --num_workers;
                     return NULL;
              }

              /* Now figure out who made this select() unblock.
               * First, check for an error or exit condition.
               */
              if (retval < 0) {
                     if (errno == EBADF) {
                            syslog(LOG_NOTICE, "select() failed: (%s)\n", strerror(errno));
                            goto do_select;
                     }
                     if (errno != EINTR) {
                            syslog(LOG_EMERG, "Exiting (%s)\n", strerror(errno));
                            server_shutting_down = 1;
                            continue;
                     } else {
#if 0
                            syslog(LOG_DEBUG, "Interrupted select()\n");
#endif
                            if (server_shutting_down) {
                                   --num_workers;
                                   return(NULL);
                            }
                            goto do_select;
                     }
              }
              else if (retval == 0) {
                     if (server_shutting_down) {
                            --num_workers;
                            return(NULL);
                     }
              }

              /* Next, check to see if it's a new client connecting * on a master socket. */

              else if ((retval > 0) && (!server_shutting_down)) for (serviceptr = ServiceHookTable; serviceptr != NULL; serviceptr = serviceptr->next) {

                     if (FD_ISSET(serviceptr->msock, &readfds)) {
                            ssock = accept(serviceptr->msock, NULL, 0);
                            if (ssock >= 0) {
                                   syslog(LOG_DEBUG, "New client socket %d", 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) {
                                          syslog(LOG_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->tcp_port = serviceptr->tcp_port;
                                   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;
                            }
                     }
              }

              /* 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 */
              ++active_workers;
              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();
              --active_workers;
       }

       /* If control reaches this point, the server is shutting down */
       --num_workers;
       return(NULL);
}

Here is the call graph for this function:

Here is the caller graph for this function:


Variable Documentation

Definition at line 983 of file sysdep.c.

volatile int exit_signal = 0

Definition at line 96 of file sysdep.c.

pid_t ForkedPid = 1

Definition at line 992 of file sysdep.c.

int nFireUps = 0

Definition at line 990 of file sysdep.c.

Definition at line 991 of file sysdep.c.

unsigned off = 0 [static]

Definition at line 367 of file sysdep.c.

unsigned on = 1 [static]

Definition at line 367 of file sysdep.c.

volatile int restart_server = 0

Definition at line 98 of file sysdep.c.

volatile int running_as_daemon = 0

Definition at line 99 of file sysdep.c.

volatile int shutdown_and_halt = 0

Definition at line 97 of file sysdep.c.