-#serial 7
+#serial 8
dnl From Jim Meyering.
dnl Determine whether chown accepts arguments of -1 for uid and gid.
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_REQUIRE([AC_TYPE_UID_T])dnl
+ AC_REQUIRE([AC_FUNC_CHOWN])
+ if test $ac_cv_func_chown_works = no; then
AC_LIBOBJ(chown)
AC_DEFINE(chown, rpl_chown,
[Define to rpl_chown if the replacement function should be used.])
+ gl_PREREQ_CHOWN
fi
])
+
+# Prerequisites of lib/chown.c.
+AC_DEFUN([gl_PREREQ_CHOWN],
+[
+ AC_CHECK_HEADERS_ONCE(unistd.h)
+])