mirror of https://github.com/octoleo/lsyncd.git
104 lines
1.6 KiB
C
104 lines
1.6 KiB
C
/*
|
|
| util.c from Lsyncd -- the Live (Mirror) Syncing Demon
|
|
|
|
|
| Small commonly used utils by Lsyncd.
|
|
|
|
|
| License: GPLv2 (see COPYING) or any later version
|
|
| Authors: Axel Kittenberger <axkibe@gmail.com>
|
|
*/
|
|
#include "feature.h"
|
|
|
|
#include <fcntl.h>
|
|
#include <limits.h>
|
|
#include <stdbool.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#define LUA_USE_APICHECK 1
|
|
#include <lua.h>
|
|
#include <lualib.h>
|
|
#include <lauxlib.h>
|
|
|
|
#include "log.h"
|
|
|
|
|
|
/*
|
|
| Returns the absolute path of a path.
|
|
|
|
|
| This is a wrapper to various C-Library differences.
|
|
*/
|
|
char *
|
|
get_realpath( char const * rpath )
|
|
{
|
|
#ifdef __GLIBC__
|
|
|
|
// in case of GLIBC the task is easy.
|
|
return realpath( rpath, NULL );
|
|
|
|
#else
|
|
#warning having to use old style realpath()
|
|
|
|
// otherwise less so and requires PATH_MAX limit
|
|
char buf[ PATH_MAX] ;
|
|
char *asw = realpath( rpath, buf );
|
|
if( !asw ) return NULL;
|
|
|
|
return s_strdup( asw );
|
|
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
| Sets the non-blocking flag of a file descriptor.
|
|
*/
|
|
void
|
|
non_block_fd( int fd )
|
|
{
|
|
int flags;
|
|
|
|
flags = fcntl( fd, F_GETFL );
|
|
|
|
if( flags == -1 )
|
|
{
|
|
logstring( "Error", "cannot get status flags!" );
|
|
exit( -1 );
|
|
}
|
|
|
|
flags |= O_NONBLOCK;
|
|
|
|
if( fcntl( fd, F_SETFL, flags ) == -1 )
|
|
{
|
|
logstring( "Error", "cannot set status flags!" );
|
|
exit( -1 );
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
| Sets the close-on-exit flag of a file descriptor.
|
|
*/
|
|
void
|
|
close_exec_fd( int fd )
|
|
{
|
|
int flags;
|
|
|
|
flags = fcntl( fd, F_GETFD );
|
|
|
|
if( flags == -1 )
|
|
{
|
|
logstring( "Error", "cannot get descriptor flags!" );
|
|
exit( -1 );
|
|
}
|
|
|
|
flags |= FD_CLOEXEC;
|
|
|
|
if( fcntl( fd, F_SETFD, flags ) == -1 )
|
|
{
|
|
logstring( "Error", "cannot set descripptor flags!" );
|
|
exit( -1 );
|
|
}
|
|
}
|
|
|
|
|