exec: make -mem-path filenames deterministic
Adds ramblocks' names to their backing files when using -mem-path. Eases
introspection and debugging.
Signed-off-by: Peter Feiner <peter@gridcentric.ca>
Message-id: 1362423265-15855-1-git-send-email-peter@gridcentric.ca
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/exec.c b/exec.c
index 46a2830..f84e095 100644
--- a/exec.c
+++ b/exec.c
@@ -844,6 +844,8 @@
const char *path)
{
char *filename;
+ char *sanitized_name;
+ char *c;
void *area;
int fd;
#ifdef MAP_POPULATE
@@ -865,7 +867,16 @@
return NULL;
}
- filename = g_strdup_printf("%s/qemu_back_mem.XXXXXX", path);
+ /* Make name safe to use with mkstemp by replacing '/' with '_'. */
+ sanitized_name = g_strdup(block->mr->name);
+ for (c = sanitized_name; *c != '\0'; c++) {
+ if (*c == '/')
+ *c = '_';
+ }
+
+ filename = g_strdup_printf("%s/qemu_back_mem.%s.XXXXXX", path,
+ sanitized_name);
+ g_free(sanitized_name);
fd = mkstemp(filename);
if (fd < 0) {
