hi, 

This patch modifies the error message of nilfs-tune when user doesn't have
a permission to access the device to show the cause of error clearly.

Signed-off-by: Jiro SEKIBA <j...@unicus.jp>
---
 sbin/nilfs-tune/nilfs-tune.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/sbin/nilfs-tune/nilfs-tune.c b/sbin/nilfs-tune/nilfs-tune.c
index 18513f2..f6cdd36 100644
--- a/sbin/nilfs-tune/nilfs-tune.c
+++ b/sbin/nilfs-tune/nilfs-tune.c
@@ -394,10 +394,12 @@ int modify_nilfs(char *device, struct nilfs_tune_options 
*opts)
        struct nilfs_super_block *sbp;
        __u64 features;
 
+       errno = 0;
        devfd = open(device, opts->flags);
 
        if (devfd == -1) {
-               fprintf(stderr, "%s: cannot open NILFS\n", device);
+               fprintf(stderr, "%s: cannot open device %s\n",
+                       strerror(errno), device);
                ret = EXIT_FAILURE;
                goto out;
        }
-- 
1.7.0.4

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