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/* ISC license. */
#include <skalibs/sysdeps.h>
#ifdef SKALIBS_HASOPENAT
#ifndef _ATFILE_SOURCE
#define _ATFILE_SOURCE
#endif
#include <skalibs/nonposix.h>
#include <fcntl.h>
#include <unistd.h>
#include <skalibs/unix-transactional.h>
int access_at (int dirfd, char const *file, int amode, unsigned int flag)
{
return faccessat(dirfd, file, amode, flag ? AT_EACCESS : 0) ;
}
#else
#include <errno.h>
#include <unistd.h>
#include <skalibs/djbunix.h>
#include <skalibs/unix-transactional.h>
int access_at (int dirfd, char const *file, int amode, unsigned int flag)
{
int fdhere ;
if (getuid() != geteuid() || getgid() != getegid())
return (errno = ENOSYS, -1) ;
(void)flag ;
fdhere = open_read(".") ;
if (fdhere < 0) return -1 ;
if (fd_chdir(dirfd) < 0)
{
fd_close(fdhere) ;
return -1 ;
}
if (access(file, amode) < 0)
{
int e = errno ;
fd_chdir(fdhere) ;
fd_close(fdhere) ;
return (errno = e, -1) ;
}
fd_chdir(fdhere) ;
fd_close(fdhere) ;
return 0 ;
}
#endif
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