[Xen-devel] [PATCH] Fix locking in tools/hotplug/Linux/locking.sh

[Jacek Konieczny <jajcus@xxxxxxxxxx>]

The claim_lock() function would fail in the perl code with:

  Invalid argument at -e line 2.

because the Perl snippet opens for reading the file descriptor, which
was earlier opened for write (append).

Signed-off-by: Jacek Konieczny <jajcus@xxxxxxxxxx>
---
 tools/hotplug/Linux/locking.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/hotplug/Linux/locking.sh b/tools/hotplug/Linux/locking.sh
index e34f155..122bcfb 100644
--- a/tools/hotplug/Linux/locking.sh
+++ b/tools/hotplug/Linux/locking.sh
@@ -44,7 +44,7 @@ claim_lock()
     # See below for a correctness proof.
     local rightfile
     while true; do
-        eval "exec $_lockfd>>$_lockfile"
+        eval "exec $_lockfd<>$_lockfile"
         flock -x $_lockfd || return $?
         # We can't just stat /dev/stdin or /proc/self/fd/$_lockfd or
         # use bash's test -ef because those all go through what is
-- 
1.7.12.4


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