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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 <sys/stat.h>
#include <fcntl.h>
#include <skalibs/unix-transactional.h>
int stat_at (int dirfd, char const *file, struct stat *st)
{
return fstatat(dirfd, file, st, 0) ;
}
int lstat_at (int dirfd, char const *file, struct stat *st)
{
return fstatat(dirfd, file, st, AT_SYMLINK_NOFOLLOW) ;
}
#else
/* OpenBSD plz. lstat() is POSIX. */
#include <skalibs/nonposix.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <skalibs/djbunix.h>
#include <skalibs/unix-transactional.h>
static int fstat_at (int dirfd, char const *file, struct stat *st, int (*dostat)(char const *, struct stat *))
{
int r ;
int fdhere = open_read(".") ;
if (fdhere < 0) return -1 ;
if (fd_chdir(dirfd) < 0)
{
fd_close(fdhere) ;
return -1 ;
}
r = (*dostat)(file, st) ;
if (r < 0)
{
int e = errno ;
fd_chdir(fdhere) ;
fd_close(fdhere) ;
errno = e ;
return -1 ;
}
if (fd_chdir(fdhere) < 0)
{
fd_close(fdhere) ;
return -1 ;
}
fd_close(fdhere) ;
return r ;
}
int stat_at (int dirfd, char const *file, struct stat *st)
{
return fstat_at(dirfd, file, st, &stat) ;
}
int lstat_at (int dirfd, char const *file, struct stat *st)
{
return fstat_at(dirfd, file, st, &lstat) ;
}
#endif
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