[PATCH] Btrfs-progs: record errno for ioctl DEFRAG_RANGE

[Liu Bo]

In order to sparse exact error message, we need to record errno here.

Signed-off-by: Liu Bo <bo.li....@oracle.com>
---
 cmds-filesystem.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/cmds-filesystem.c b/cmds-filesystem.c
index 2210020..3f386e2 100644
--- a/cmds-filesystem.c
+++ b/cmds-filesystem.c
@@ -431,6 +431,7 @@ static int cmd_defrag(int argc, char **argv)
                                close(fd);
                                break;
                        }
+                       e = errno;
                }
                if (ret) {
                        fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
-- 
1.7.7

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