tar: prefer openat-style functions

[chaz/tar] / src / compare.c

diff --git a/src/compare.c b/src/compare.c
index 204c5dc16dd38f204bea980e84bc4045e78387c5..1ee9bcb19d9f7e3d33ccc783f5b64cfba0cd6955 100644 (file)
--- a/src/compare.c
+++ b/src/compare.c
@@ -222,9 +222,9 @@ diff_file (void)
             ? O_NOATIME
             : 0);
 
-         diff_handle = open (file_name,
-                             (O_RDONLY | O_BINARY | O_CLOEXEC | O_NOCTTY
-                              | O_NONBLOCK | atime_flag));
+         diff_handle = openat (chdir_fd, file_name,
+                               (O_RDONLY | O_BINARY | O_CLOEXEC | O_NOCTTY
+                                | O_NONBLOCK | atime_flag));
 
          if (diff_handle < 0)
            {
@@ -244,7 +244,7 @@ diff_file (void)
              if (atime_preserve_option == replace_atime_preserve)
                {
                  struct timespec atime = get_stat_atime (&stat_data);
-                 if (set_file_atime (diff_handle, AT_FDCWD, file_name,
+                 if (set_file_atime (diff_handle, chdir_fd, file_name,
                                      atime, 0)
                      != 0)
                    utime_error (file_name);
@@ -279,7 +279,8 @@ diff_symlink (void)
   size_t len = strlen (current_stat_info.link_name);
   char *linkbuf = alloca (len + 1);
 
-  int status = readlink (current_stat_info.file_name, linkbuf, len + 1);
+  int status = readlinkat (chdir_fd, current_stat_info.file_name,
+                          linkbuf, len + 1);
 
   if (status < 0)
     {
@@ -428,9 +429,9 @@ diff_multivol (void)
     }
 
 
-  fd = open (current_stat_info.file_name,
-            (O_RDONLY | O_BINARY | O_CLOEXEC | O_NOCTTY | O_NONBLOCK
-             | atime_flag));
+  fd = openat (chdir_fd, current_stat_info.file_name,
+              (O_RDONLY | O_BINARY | O_CLOEXEC | O_NOCTTY | O_NONBLOCK
+               | atime_flag));
 
   if (fd < 0)
     {