Hi,

#xm dump-core 12 a.dump
Dumping core of domain: 12 ...
Error: Cannot dump core for existing file /tmp/a.dump
Usage: xm dump-core [-L|--live] [-C|--crash] <Domain> [Filename]
Dump core for a specific domain.
 -L, --live Dump core without pausing the domain
 -C, --crash Crash domain after dumping core
# xm save 12 a.save
Error: Cannot save for existing file /tmp/a.save
Usage: xm save <Domain> <CheckpointFile>
Save a domain state to restore later.
#
Signed-off-by: Kazuki Mizushima <mizushima.kazuk@xxxxxxxxxxxxxx>
diff -r 3ac19fda0bc2 tools/python/xen/xend/XendDomain.py
--- a/tools/python/xen/xend/XendDomain.py Fri Mar 02 12:11:52 2007 +0000
+++ b/tools/python/xen/xend/XendDomain.py Wed Mar 07 14:57:58 2007 +0900
@@ -1094,6 +1094,9 @@ class XendDomain:
 if dominfo.getDomid() == DOM0_ID:
 raise XendError("Cannot dump core for privileged domain %s" % domid)
+ if os.path.exists(filename):
+ raise XendError("Cannot dump core for existing file %s" % filename)
+
 try:
 log.info("Domain core dump requested for domain %s (%d) "
 "live=%d crash=%d.",
@@ -1190,6 +1193,9 @@ class XendDomain:
 if dominfo.getDomid() == DOM0_ID:
 raise XendError("Cannot save privileged domain %i" % domid)
+
+ if os.path.exists(dst):
+ raise XendError("Cannot save for existing file %s" % dst)
 oflags = os.O_WRONLY | os.O_CREAT | os.O_TRUNC
 if hasattr(os, "O_LARGEFILE"):
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