1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
#serial 7
dnl From Jim Meyering.
dnl Determine whether chown accepts arguments of -1 for uid and gid.
dnl If it doesn't, arrange to use the replacement function.
dnl
AC_DEFUN([jm_FUNC_CHOWN],
[AC_REQUIRE([AC_TYPE_UID_T])dnl
test -z "$ac_cv_header_unistd_h" \
&& AC_CHECK_HEADERS(unistd.h)
AC_CACHE_CHECK([for working chown], jm_cv_func_working_chown,
[AC_TRY_RUN([
# include <sys/types.h>
# include <sys/stat.h>
# include <fcntl.h>
# ifdef HAVE_UNISTD_H
# include <unistd.h>
# endif
int
main ()
{
char *f = "conftest.chown";
struct stat before, after;
if (creat (f, 0600) < 0)
exit (1);
if (stat (f, &before) < 0)
exit (1);
if (chown (f, (uid_t) -1, (gid_t) -1) == -1)
exit (1);
if (stat (f, &after) < 0)
exit (1);
exit ((before.st_uid == after.st_uid
&& before.st_gid == after.st_gid) ? 0 : 1);
}
],
jm_cv_func_working_chown=yes,
jm_cv_func_working_chown=no,
dnl When crosscompiling, assume chown is broken.
jm_cv_func_working_chown=no)
])
if test $jm_cv_func_working_chown = no; then
AC_LIBOBJ(chown)
AC_DEFINE(chown, rpl_chown,
[Define to rpl_chown if the replacement function should be used.])
fi
])
|
