[libvirt] [PATCH] virsh: A bit smarter attach-disk

[Osier Yang]

Detects the file type of source path if no "--sourcetype" and
"driver" is specified, instead of always set the disk type as
"block".

And previous "virCommandOptString" ensures "source" is not NULL,
remove the conditional checking.
---
 tools/virsh.c |   14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/tools/virsh.c b/tools/virsh.c
index d45a4c9..3b845ac 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -14428,6 +14428,7 @@ cmdAttachDisk(vshControl *ctl, const vshCmd *cmd)
     const char *stype = NULL;
     virBuffer buf = VIR_BUFFER_INITIALIZER;
     char *xml;
+    struct stat st;
 
     if (!vshConnectionUsability(ctl, ctl->conn))
         goto cleanup;
@@ -14458,8 +14459,12 @@ cmdAttachDisk(vshControl *ctl, const vshCmd *cmd)
     }
 
     if (!stype) {
-        if (driver && (STREQ(driver, "file") || STREQ(driver, "tap")))
+        if (driver && (STREQ(driver, "file") || STREQ(driver, "tap"))) {
             isFile = true;
+        } else {
+            if (!stat(source, &st))
+                isFile = S_ISREG(st.st_mode) ? true : false;
+        }
     } else if (STREQ(stype, "file")) {
         isFile = true;
     } else if (STRNEQ(stype, "block")) {
@@ -14497,10 +14502,9 @@ cmdAttachDisk(vshControl *ctl, const vshCmd *cmd)
     if (driver || subdriver || cache)
         virBufferAddLit(&buf, "/>\n");
 
-    if (source)
-        virBufferAsprintf(&buf, "  <source %s='%s'/>\n",
-                          (isFile) ? "file" : "dev",
-                          source);
+    virBufferAsprintf(&buf, "  <source %s='%s'/>\n",
+                      (isFile) ? "file" : "dev",
+                      source);
     virBufferAsprintf(&buf, "  <target dev='%s'/>\n", target);
     if (mode)
         virBufferAsprintf(&buf, "  <%s/>\n", mode);
-- 
1.7.1