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changeset 1428:b2f74df5b9c6

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(jm_FUNC_CHOWN): Add a check to verify that the uid and gid actually remain unchanged.
author Jim Meyering <jim@meyering.net>
date Thu, 09 Jul 1998 14:29:11 +0000
parents 2056a0dc4888
children 0904420c44e6
files m4/chown.m4
diffstat 1 files changed, 9 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/m4/chown.m4
+++ b/m4/chown.m4
@@ -17,6 +17,7 @@
  AC_CACHE_CHECK([for working chown], jm_cv_func_working_chown,
   [AC_TRY_RUN([
 #   include <sys/types.h>
+#   include <stat.h>
 #   include <fcntl.h>
 #   ifdef HAVE_UNISTD_H
 #    include <unistd.h>
@@ -28,7 +29,14 @@
       char *f = "conftestchown";
       if (creat (f, 0600) < 0)
         exit (1);
-      exit (chown (f, (uid_t) -1, (gid_t) -1) == -1 ? 1 : 0);
+      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,