1 /* ISC license. */
2
3 #include <skalibs/sysdeps.h>
4
5 #ifdef SKALIBS_HASOPENAT
6
7 #ifndef _ATFILE_SOURCE
8 #define _ATFILE_SOURCE
9 #endif
10
11 #include <skalibs/nonposix.h>
12 #include <sys/stat.h>
13 #include <fcntl.h>
14 #include <skalibs/unix-transactional.h>
15
stat_at(int dirfd,char const * file,struct stat * st)16 int stat_at (int dirfd, char const *file, struct stat *st)
17 {
18 return fstatat(dirfd, file, st, 0) ;
19 }
20
lstat_at(int dirfd,char const * file,struct stat * st)21 int lstat_at (int dirfd, char const *file, struct stat *st)
22 {
23 return fstatat(dirfd, file, st, AT_SYMLINK_NOFOLLOW) ;
24 }
25
26 #else
27
28 /* OpenBSD plz. lstat() is POSIX. */
29 #include <skalibs/nonposix.h>
30 #include <sys/stat.h>
31 #include <fcntl.h>
32 #include <errno.h>
33 #include <skalibs/djbunix.h>
34 #include <skalibs/unix-transactional.h>
35
fstat_at(int dirfd,char const * file,struct stat * st,int (* dostat)(char const *,struct stat *))36 static int fstat_at (int dirfd, char const *file, struct stat *st, int (*dostat)(char const *, struct stat *))
37 {
38 int r ;
39 int fdhere = open_read(".") ;
40 if (fdhere < 0) return -1 ;
41 if (fd_chdir(dirfd) < 0)
42 {
43 fd_close(fdhere) ;
44 return -1 ;
45 }
46 r = (*dostat)(file, st) ;
47 if (r < 0)
48 {
49 int e = errno ;
50 fd_chdir(fdhere) ;
51 fd_close(fdhere) ;
52 errno = e ;
53 return -1 ;
54 }
55 if (fd_chdir(fdhere) < 0)
56 {
57 fd_close(fdhere) ;
58 return -1 ;
59 }
60 fd_close(fdhere) ;
61 return r ;
62 }
63
stat_at(int dirfd,char const * file,struct stat * st)64 int stat_at (int dirfd, char const *file, struct stat *st)
65 {
66 return fstat_at(dirfd, file, st, &stat) ;
67 }
68
lstat_at(int dirfd,char const * file,struct stat * st)69 int lstat_at (int dirfd, char const *file, struct stat *st)
70 {
71 return fstat_at(dirfd, file, st, &lstat) ;
72 }
73
74 #endif
75