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//
// ZoneMinder Video Device Fixer, $Date$, $Revision$
// Copyright (C) 2001-2008 Philip Coombes
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <mysql/mysql.h>
#include "zm.h"
#include "zm_db.h"
// Determine if we are a member of the group
int inGroup( gid_t gid )
{
// Get how many groups we are in
int n_gids = getgroups( 0, NULL );
if ( n_gids < 0 )
{
Error( "getgroups:%s", strerror(errno) );
return( -1 );
}
// Not in any groups
if ( !n_gids )
{
return( 0 );
}
// Allocate space to hold groups
gid_t *gids = new gid_t[n_gids * sizeof(gid_t)];
if ( !gids )
{
Error( "Unable to allocate groups: %s", strerror(errno) );
return( -1 );
}
// Get list of groups
if ( getgroups( n_gids, gids ) != n_gids )
{
Error( "getgroups:%s", strerror(errno) );
delete[] gids;
return( -1 );
}
// See if gid in list of groups we belong to
int in_gid = 0;
for ( int i = 0; i < n_gids; i++ )
{
if ( gids[i] == gid )
{
in_gid = 1;
}
}
delete[] gids;
return( in_gid );
}
bool fixDevice( const char *device_path )
{
struct stat stat_buf;
if ( stat( device_path, &stat_buf ) < 0 )
{
Error( "Can't stat %s: %s", device_path, strerror(errno));
return( false );
}
uid_t uid = getuid();
gid_t gid = getgid();
int in_gid;
if ( (in_gid = inGroup( stat_buf.st_gid )) < 0 )
{
return( false );
}
mode_t mask = 0;
if ( uid == stat_buf.st_uid )
{
// If we are the owner
mask = 00600;
}
else if ( gid == stat_buf.st_gid || in_gid )
{
// If we are in the owner group
mask = 00060;
}
else
{
// We are neither the owner nor in the group
mask = 00006;
}
mode_t mode = stat_buf.st_mode;
if ( (mode & mask) == mask )
{
Debug( 1, "Permissions on %s are ok at %o", device_path, mode );
return( true );
}
mode |= mask;
Info( "Resetting permissions on %s to %o", device_path, mode );
if ( chmod( device_path, mode ) < 0 )
{
Error( "Can't chmod %s to %o: %s", device_path, mode, strerror(errno));
return( false );
}
return( true );
}
int main( int argc, char *argv[] )
{
self = argv[0];
zmLoadConfig();
logInit( "zmfix" );
logCapLevel( Logger::ERROR );
// Only do registered devices
static char sql[ZM_SQL_SML_BUFSIZ];
snprintf( sql, sizeof(sql), "select distinct Device from Monitors where not isnull(Device) and Type = 'Local'" );
if ( mysql_query( &dbconn, sql ) )
{
Error( "Can't run query: %s", mysql_error( &dbconn ) );
exit( mysql_errno( &dbconn ) );
}
MYSQL_RES *result = mysql_store_result( &dbconn );
if ( !result )
{
Error( "Can't use query result: %s", mysql_error( &dbconn ) );
exit( mysql_errno( &dbconn ) );
}
for( int i = 0; MYSQL_ROW dbrow = mysql_fetch_row( result ); i++ )
{
fixDevice( dbrow[0] );
}
if ( mysql_errno( &dbconn ) )
{
Error( "Can't fetch row: %s", mysql_error( &dbconn ) );
exit( mysql_errno( &dbconn ) );
}
// Yadda yadda
mysql_free_result( result );
snprintf( sql, sizeof(sql), "select distinct ControlDevice from Monitors where not isEmpty(ControlDevice)" );
if ( mysql_query( &dbconn, sql ) )
{
Error( "Can't run query: %s", mysql_error( &dbconn ) );
exit( mysql_errno( &dbconn ) );
}
result = mysql_store_result( &dbconn );
if ( !result )
{
Error( "Can't use query result: %s", mysql_error( &dbconn ) );
exit( mysql_errno( &dbconn ) );
}
for( int i = 0; MYSQL_ROW dbrow = mysql_fetch_row( result ); i++ )
{
fixDevice( dbrow[0] );
}
if ( mysql_errno( &dbconn ) )
{
Error( "Can't fetch row: %s", mysql_error( &dbconn ) );
exit( mysql_errno( &dbconn ) );
}
// Yadda yadda
mysql_free_result( result );
if ( config.opt_x10 )
{
if ( config.x10_device )
{
fixDevice( config.x10_device );
}
}
return( 0 );
}
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