#include "portab.h"
-static char UNUSED id[] = "$Id: ngircd.c,v 1.96 2005/06/01 21:52:18 alex Exp $";
+static char UNUSED id[] = "$Id: ngircd.c,v 1.97 2005/06/17 18:22:45 fw Exp $";
/**
* @file
LOCAL void Setup_FDStreams PARAMS(( void ));
+LOCAL bool NGIRCd_Init PARAMS(( bool ));
/**
* The main() function of ngIRCd.
GLOBAL int
main( int argc, const char *argv[] )
{
- struct passwd *pwd;
- struct group *grp;
bool ok, configtest = false;
- long pid;
int i;
size_t n;
Log_Init( );
Conf_Init( );
- if( Conf_Chroot[0] )
- {
- /* Chroot */
- if( chdir( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno ));
-
- if( chroot( Conf_Chroot ) != 0 ) Log( LOG_ERR, "Can't change root directory to \"%s\": %s", Conf_Chroot, strerror( errno ));
- else Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot );
- }
-
- if( Conf_GID != 0 )
- {
- /* Set new group ID */
- if( setgid( Conf_GID ) != 0 ) Log( LOG_ERR, "Can't change group ID to %u: %s", Conf_GID, strerror( errno ));
- }
- if( Conf_UID != 0 )
- {
- /* Set new user ID */
- if( setuid( Conf_UID ) != 0 ) Log( LOG_ERR, "Can't change user ID to %u: %s", Conf_UID, strerror( errno ));
- }
-
- /* Normally a child process is forked which isn't any longer
- * connected to ther controlling terminal. Use "--nodaemon"
- * to disable this "daemon mode" (useful for debugging). */
- if( ! NGIRCd_NoDaemon )
- {
- /* fork child process */
- pid = (long)fork( );
- if( pid > 0 )
- {
- /* "Old" process: exit. */
- exit( 0 );
- }
- if( pid < 0 )
- {
- /* Error!? */
- fprintf( stderr, "%s: Can't fork: %s!\nFatal error, exiting now ...\n", PACKAGE_NAME, strerror( errno ));
- exit( 1 );
- }
-
- /* New child process */
- (void)setsid( );
- chdir( "/" );
-
- /* Detach stdin, stdout and stderr */
- Setup_FDStreams( );
- }
-
- /* Create PID file */
- pid = (long) getpid( );
- Pidfile_Create( pid );
-
- /* Show user, group, and PID of the running daemon */
- pwd = getpwuid( getuid( )); grp = getgrgid( getgid( ));
- Log( LOG_INFO, "Running as user %s(%ld), group %s(%ld), with PID %ld.", pwd ? pwd->pw_name : "unknown", (long)getuid( ), grp ? grp->gr_name : "unknown", (long)getgid( ), pid);
-
- /* Change working directory to home directory of the user
- * we are running as (when not running chroot()'ed!) */
- if( Conf_UID != 0 && ! Conf_Chroot[0] )
- {
- struct passwd *pwd;
-
- pwd = getpwuid( Conf_UID );
- if( pwd != NULL )
- {
- if( chdir( pwd->pw_dir ) == 0 ) Log( LOG_DEBUG, "Changed working directory to \"%s\" ...", pwd->pw_dir );
- else Log( LOG_ERR, "Can't change working directory to \"%s\": %s", pwd->pw_dir, strerror( errno ));
- }
- else Log( LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID );
+ if (!NGIRCd_Init( NGIRCd_NoDaemon )) {
+ Log(LOG_WARNING, "Fatal: Initialization failed");
+ exit(1);
}
/* Initialize modules, part II: these functions are eventually
* beim PASS-Befehl verwendete Syntax sowie die erweiterten Flags
* sind in doc/Protocol.txt beschrieben. */
#ifdef IRCPLUS
- sprintf( NGIRCd_ProtoID, "%s%s %s|%s:%s", PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION, IRCPLUSFLAGS );
+ snprintf( NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s:%s", PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION, IRCPLUSFLAGS );
#ifdef ZLIB
strcat( NGIRCd_ProtoID, "Z" );
#endif
if( Conf_OperCanMode ) strcat( NGIRCd_ProtoID, "o" );
#else
- sprintf( NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION );
+ snprintf( NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION );
#endif
- strcat( NGIRCd_ProtoID, " P" );
+ strlcat( NGIRCd_ProtoID, " P", sizeof NGIRCd_ProtoID );
#ifdef ZLIB
- strcat( NGIRCd_ProtoID, "Z" );
+ strlcat( NGIRCd_ProtoID, "Z", sizeof NGIRCd_ProtoID );
#endif
Log( LOG_DEBUG, "Protocol and server ID is \"%s\".", NGIRCd_ProtoID );
Channel_Exit( );
Lists_Exit( );
Log_Exit( );
-
- Pidfile_Delete( );
}
+ Pidfile_Delete( );
return 0;
} /* main */
NGIRCd_VersionAddition[0] = '\0';
#ifdef SYSLOG
- strcpy( NGIRCd_VersionAddition, "SYSLOG" );
+ strlcpy( NGIRCd_VersionAddition, "SYSLOG", sizeof NGIRCd_VersionAddition );
#endif
#ifdef ZLIB
- if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
- strcat( NGIRCd_VersionAddition, "ZLIB" );
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+ strlcat( NGIRCd_VersionAddition, "ZLIB", sizeof NGIRCd_VersionAddition );
#endif
#ifdef TCPWRAP
- if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
- strcat( NGIRCd_VersionAddition, "TCPWRAP" );
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+ strlcat( NGIRCd_VersionAddition, "TCPWRAP", sizeof NGIRCd_VersionAddition );
#endif
#ifdef RENDEZVOUS
- if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
- strcat( NGIRCd_VersionAddition, "RENDEZVOUS" );
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+ strlcat( NGIRCd_VersionAddition, "RENDEZVOUS", sizeof NGIRCd_VersionAddition );
#endif
#ifdef IDENTAUTH
- if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
- strcat( NGIRCd_VersionAddition, "IDENT" );
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+ strlcat( NGIRCd_VersionAddition, "IDENT", sizeof NGIRCd_VersionAddition );
#endif
#ifdef DEBUG
- if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
- strcat( NGIRCd_VersionAddition, "DEBUG" );
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+ strlcat( NGIRCd_VersionAddition, "DEBUG", sizeof NGIRCd_VersionAddition );
#endif
#ifdef SNIFFER
- if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
- strcat( NGIRCd_VersionAddition, "SNIFFER" );
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+ strlcat( NGIRCd_VersionAddition, "SNIFFER", sizeof NGIRCd_VersionAddition );
#endif
#ifdef STRICT_RFC
- if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
- strcat( NGIRCd_VersionAddition, "RFC" );
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+ strlcat( NGIRCd_VersionAddition, "RFC", sizeof NGIRCd_VersionAddition );
#endif
#ifdef IRCPLUS
- if( NGIRCd_VersionAddition[0] ) strcat( NGIRCd_VersionAddition, "+" );
- strcat( NGIRCd_VersionAddition, "IRCPLUS" );
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
+
+ strlcat( NGIRCd_VersionAddition, "IRCPLUS", sizeof NGIRCd_VersionAddition );
#endif
- if( NGIRCd_VersionAddition[0] ) strlcat( NGIRCd_VersionAddition, "-", sizeof( NGIRCd_VersionAddition ));
+ if( NGIRCd_VersionAddition[0] )
+ strlcat( NGIRCd_VersionAddition, "-", sizeof( NGIRCd_VersionAddition ));
+
strlcat( NGIRCd_VersionAddition, TARGET_CPU, sizeof( NGIRCd_VersionAddition ));
strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
strlcat( NGIRCd_VersionAddition, TARGET_VENDOR, sizeof( NGIRCd_VersionAddition ));
Conn_ExitListeners( );
/* Remember old server name */
- strcpy( old_name, Conf_ServerName );
+ strlcpy( old_name, Conf_ServerName, sizeof old_name );
/* Re-read configuration ... */
Conf_Rehash( );
LOCAL void
Pidfile_Create( long pid )
{
- FILE *pidf;
+ int pidfd;
+ char pidbuf[64];
+ int len;
/* Pidfile configured? */
if( ! Conf_PidFile[0] ) return;
Log( LOG_DEBUG, "Creating PID file (%s) ...", Conf_PidFile );
#endif
- pidf = fopen( Conf_PidFile, "w" );
-
- if( ! pidf )
- {
+ pidfd = open( Conf_PidFile, O_RDWR|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
+ if ( pidfd < 0 ) {
Log( LOG_ERR, "Error writing PID file (%s): %s", Conf_PidFile, strerror( errno ));
return;
}
- if( fprintf( pidf, "%ld\n", pid ) < 0 )
+ len = snprintf( pidbuf, sizeof pidbuf, "%ld\n", pid );
+ if (len < 0|| len < (int)sizeof pid) {
+ Log( LOG_ERR, "Error converting pid");
+ return;
+ }
+
+ if( write( pidfd, pidbuf, len) != len)
Log( LOG_ERR, "Can't write PID file (%s): %s", Conf_PidFile, strerror( errno ));
- if( fclose(pidf) != 0 )
+ if( close(pidfd) != 0 )
Log( LOG_ERR, "Error closing PID file (%s): %s", Conf_PidFile, strerror( errno ));
} /* Pidfile_Create */
* we are most probably chrooted already and the server has been
* restarted. So we simply don't try to redirect stdXXX ... */
fd = open( "/dev/null", O_RDWR );
- if ( fd < 0 ) return;
+ if ( fd < 0 ) {
+ Log(LOG_WARNING, "Could not open /dev/null: %s", strerror(errno));
+ return;
+ }
- /* Close "old" stdin/out/err descriptors */
- close( 0 ); close( 1 ); close( 2 );
+ fflush(stdout);
+ fflush(stderr);
/* Create new stdin(0), stdout(1) and stderr(2) descriptors */
dup2( fd, 0 ); dup2( fd, 1 ); dup2( fd, 2 );
} /* Setup_FDStreams */
+LOCAL bool
+NGIRCd_getNobodyID(unsigned int *uid, unsigned int *gid )
+{
+ struct passwd *pwd;
+
+ pwd = getpwnam("nobody");
+ if (!pwd) return false;
+
+ if ( !pwd->pw_uid || !pwd->pw_gid)
+ return false;
+
+ *uid = pwd->pw_uid;
+ *gid = pwd->pw_gid;
+ endpwent();
+
+ return true;
+}
+
+
+LOCAL bool
+NGIRCd_Init( bool NGIRCd_NoDaemon )
+{
+ static bool initialized;
+ bool chrooted = false;
+ struct passwd *pwd;
+ struct group *grp;
+ int real_errno;
+ long pid;
+
+ if (initialized)
+ return true;
+
+ if( Conf_Chroot[0] ) {
+ if( chdir( Conf_Chroot ) != 0 ) {
+ Log( LOG_ERR, "Can't chdir() in ChrootDir (%s): %s", Conf_Chroot, strerror( errno ));
+ return false;
+ }
+
+ if( chroot( Conf_Chroot ) != 0 ) {
+ if (errno != EPERM) {
+ Log( LOG_ERR, "Can't change root directory to \"%s\": %s",
+ Conf_Chroot, strerror( errno ));
+
+ return false;
+ }
+ } else {
+ chrooted = true;
+ Log( LOG_INFO, "Changed root and working directory to \"%s\".", Conf_Chroot );
+ }
+ }
+
+ if ( Conf_UID == 0 ) {
+ Log( LOG_INFO, "Conf_UID must not be 0, switching to user nobody", Conf_UID );
+
+ if (!NGIRCd_getNobodyID(&Conf_UID, &Conf_GID )) {
+ Log( LOG_WARNING, "Could not get uid/gid of user nobody: %s",
+ errno ? strerror(errno) : "not found" );
+ return false;
+ }
+ }
+
+ if( setgid( Conf_GID ) != 0 ) {
+ real_errno = errno;
+ Log( LOG_ERR, "Can't change group ID to %u: %s", Conf_GID, strerror( errno ));
+ if (real_errno != EPERM)
+ return false;
+ }
+
+ if( setuid( Conf_UID ) != 0 ) {
+ real_errno = errno;
+ Log( LOG_ERR, "Can't change user ID to %u: %s", Conf_UID, strerror( errno ));
+ if (real_errno != EPERM)
+ return false;
+ }
+
+ initialized = true;
+
+ /* Normally a child process is forked which isn't any longer
+ * connected to ther controlling terminal. Use "--nodaemon"
+ * to disable this "daemon mode" (useful for debugging). */
+ if ( ! NGIRCd_NoDaemon ) {
+ initialized = true;
+ pid = (long)fork( );
+ if( pid > 0 ) {
+ /* "Old" process: exit. */
+ exit( 0 );
+ }
+ if( pid < 0 ) {
+ /* Error!? */
+ fprintf( stderr, "%s: Can't fork: %s!\nFatal error, exiting now ...\n",
+ PACKAGE_NAME, strerror( errno ));
+ exit( 1 );
+ }
+
+ /* New child process */
+ (void)setsid( );
+ chdir( "/" );
+
+ /* Detach stdin, stdout and stderr */
+ Setup_FDStreams( );
+ }
+ pid = getpid();
+
+ Pidfile_Create( pid );
+
+ /* check uid we are running as, can be different from values configured (e.g. if we were already
+ started with a uid > 0 */
+ Conf_UID = getuid();
+ Conf_GID = getgid();
+
+ assert( Conf_GID > 0);
+ assert( Conf_UID > 0);
+
+ pwd = getpwuid( Conf_UID );
+ grp = getgrgid( Conf_GID );
+ Log( LOG_INFO, "Running as user %s(%ld), group %s(%ld), with PID %ld.",
+ pwd ? pwd->pw_name : "unknown", Conf_UID,
+ grp ? grp->gr_name : "unknown", Conf_GID, pid);
+
+ if ( chrooted ) {
+ Log( LOG_INFO, "Running chrooted, chrootdir \"%s\".", Conf_Chroot );
+ return true;
+ } else {
+ Log( LOG_INFO, "Not running chrooted." );
+ }
+
+ /* Change working directory to home directory of the user
+ * we are running as (when not running chroot()'ed!) */
+
+ if ( pwd ) {
+ if( chdir( pwd->pw_dir ) == 0 )
+ Log( LOG_DEBUG, "Changed working directory to \"%s\" ...", pwd->pw_dir );
+ else
+ Log( LOG_ERR, "Can't change working directory to \"%s\": %s",
+ pwd->pw_dir, strerror( errno ));
+ } else {
+ Log( LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID );
+ }
+
+return true;
+}
+
/* -eof- */
projects / ngircd-alex.git / commitdiff