[libvirt] [PATCH] rpc: remove trailing carriage return character in error string

[Guannan Ren]

If the error message string ends with '\r\n', it is not enough
to remove '\n' only which leads to messed string.
Example, after three time incorrect password input, virsh command
virsh -c qemu://remoteserver/system will report error like:

: Connection reset by peerey,gssapi-keyex,gssapi-with-mic,password).

it should be:
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
: Connection reset by peer

The terminal interprets '\r' as "move the cursor back to the start
of the current line", so we have to remove the character if it exists.
---
 src/rpc/virnetsocket.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/src/rpc/virnetsocket.c b/src/rpc/virnetsocket.c
index 08dfbb0..8385d88 100644
--- a/src/rpc/virnetsocket.c
+++ b/src/rpc/virnetsocket.c
@@ -985,8 +985,14 @@ reread:
         virFileReadLimFD(sock->errfd, 1024, &errout) >= 0 &&
         errout != NULL) {
         size_t elen = strlen(errout);
-        if (elen && errout[elen-1] == '\n')
+        if (elen && errout[elen-1] == '\n') {
             errout[elen-1] = '\0';
+
+            /* remove trailing '\r' if it exists */
+            if (elen-1 && errout[elen-2] == '\r') {
+                errout[elen-2] = '\0';
+            }
+        }
     }
 
     if (ret < 0) {
-- 
1.7.7.5