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/* ISC license. */
#include <skalibs/sysdeps.h>
#if !defined(SKALIBS_HASOPENAT) || !defined(SKALIBS_HASLINKAT)
#include <skalibs/bsdsnowflake.h>
#include <errno.h>
#include <skalibs/functypes.h>
#include <skalibs/djbunix.h>
#include <skalibs/unix-transactional.h>
#include "at-internal.h"
int emulate_at (int dirfd, init_func_ref f, deinit_func_ref g, void *p)
{
int r ;
int fdhere = open_read(".") ;
if (fdhere < 0) return -1 ;
if (fd_chdir(dirfd) < 0) goto errclose ;
r = (*f)(p) ;
if (r < 0)
{
int e = errno ;
fd_chdir(fdhere) ;
errno = e ;
goto errclose ;
}
if (fd_chdir(fdhere) < 0)
{
(*g)(r, p) ;
goto errclose ;
}
fd_close(fdhere) ;
return r ;
errclose:
fd_close(fdhere) ;
return -1 ;
}
#endif
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