File coreutils-fix_handling_of_symlinks_in_mount_lis... of Package coreutils.1874

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File coreutils-fix_handling_of_symlinks_in_mount_list.patch of Package coreutils.1874

commit fb902297f536df060ff10ef06bb8fe6cfe0c845e
Author: Pádraig Brady <P@draigBrady.com>
Date:   Mon May 12 13:29:01 2014 +0100

df: fix handling of symlinks in mount list
    
    The symlink handling in commit v8.21-172-g33660b4 was incomplete
    in the case where there were symlinks in the mount list itself.
    For example, in the case where /dev/mapper/fedora-home was in the
    mount list and that in turn was a symlink to /dev/dm-2, we have:
    
      before> df --out=source /dev/mapper/fedora-home
              devtmpfs
    
      after > df --out=source /dev/mapper/fedora-home
              /dev/mapper/fedora-home
    
    * src/df.c (get_disk): Compare canonicalized device names from
    the mount list.  Note we still display the non canonicalized name,
    even if longer, as we assume that is the most representative.
    * tests/df/df-symlink.sh: This could theoretically fail on some systems
    depending on the content of the mount list, but adjust to fail on any
    system where symlinks are present in the mount list for the current dir.

diff --git a/src/df.c b/src/df.c
index 2b5a54e..24897a3 100644
--- a/src/df.c
+++ b/src/df.c
@@ -1056,13 +1056,19 @@ get_disk (char const *disk)
   char const *file = disk;
 
   char *resolved = canonicalize_file_name (disk);
-  if (resolved && resolved[0] == '/')
+  if (resolved && IS_ABSOLUTE_FILE_NAME (resolved))
     disk = resolved;
 
   size_t best_match_len = SIZE_MAX;
   for (me = mount_list; me; me = me->me_next)
     {
-      if (STREQ (disk, me->me_devname))
+      /* TODO: Should cache canon_dev in the mount_entry struct.  */
+      char *devname = me->me_devname;
+      char *canon_dev = canonicalize_file_name (me->me_devname);
+      if (canon_dev && IS_ABSOLUTE_FILE_NAME (canon_dev))
+        devname = canon_dev;
+
+      if (STREQ (disk, devname))
         {
           size_t len = strlen (me->me_mountdir);
           if (len < best_match_len)
@@ -1074,6 +1080,8 @@ get_disk (char const *disk)
                 best_match_len = len;
             }
         }
+
+      free (canon_dev);
     }
 
   free (resolved);
diff --git a/tests/df/df-symlink.sh b/tests/df/df-symlink.sh
index aaed810..6d96bd2 100755
--- a/tests/df/df-symlink.sh
+++ b/tests/df/df-symlink.sh
@@ -28,4 +28,11 @@ df --out=source,target "$disk" > exp || skip_ "cannot get info for $disk"
 df --out=source,target symlink > out || fail=1
 compare exp out || fail=1
 
+# Ensure we output the same values for device nodes and '.'
+# This was not the case in coreutil-8.22 on systems
+# where the device in the mount list was a symlink itself.
+# I.E. '.' => /dev/mapper/fedora-home -> /dev/dm-2
+df --out=source,target '.' > out || fail=1
+compare exp out || fail=1
+
 Exit $fail

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File coreutils-fix_handling_of_symlinks_in_mount_list.patch of Package coreutils.1874

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