[PATCH] ioemu: handle empty vnc passwd

[Samuel Thibault <samuel.thibault@eu.citrix.com>]

ioemu: handle empty vnc passwd
Have xenstore_read_vncpasswd return -1 when it is unable to read the
passwd from XenStore (and store an empty password).  However, don't exit
in such case since it may just mean that the use didn't set a passwd.
If he really did, xend would have given the passwd flag in the -vnc
option, and the empty passwd would make the vnc authentication reject
any password anyway.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

diff -r 9e92672385a5 tools/ioemu/xenstore.c
--- a/tools/ioemu/xenstore.c	Wed Jan 23 13:37:03 2008 +0000
+++ b/tools/ioemu/xenstore.c	Wed Jan 23 15:53:01 2008 +0000
@@ -518,7 +518,7 @@ int xenstore_read_vncpasswd(int domid, c
         pwbuf[0] = '\0';
         free(uuid);
         free(path);
-        return rc;
+        return -1;
     }
diff -r 9e92672385a5 tools/ioemu/vl.c
--- a/tools/ioemu/vl.c	Wed Jan 23 13:37:03 2008 +0000
+++ b/tools/ioemu/vl.c	Wed Jan 23 15:55:38 2008 +0000
@@ -7756,8 +7756,7 @@ int main(int argc, char **argv)
 	int vnc_display_port;
 	char password[20];
 	vnc_display_init(ds);
-	if (xenstore_read_vncpasswd(domid, password, sizeof(password)) < 0)
-	    exit(0);
+	xenstore_read_vncpasswd(domid, password, sizeof(password));
 	vnc_display_password(ds, password);
 	if ((vnc_display_port = vnc_display_open(ds, vnc_display, vncunused)) < 0) 
 	    exit (0);