[libvirt] [PATCHv4 2/4] virsh: Reject negative numbers in vshCommandOptUL

[Peter Krempa]

To follow the new semantics of the vshCommandOptToU* functions convert
this one to reject negative numbers too. To allow using -1 for "maximum"
semantics for the two bandwidth functions that use this helper introduce
vshCommandOptULWrap. Although currently the migrate-setspeed function
for the qemu driver will reject -1 as maximum.
---
 tools/virsh-domain.c |  4 ++--
 tools/virsh.c        | 46 +++++++++++++++++++++++++++++++++++++---------
 tools/virsh.h        |  3 +++
 3 files changed, 42 insertions(+), 11 deletions(-)

diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 84a6706..d76865b 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -1457,7 +1457,7 @@ blockJobImpl(vshControl *ctl, const vshCmd *cmd,
     if (vshCommandOptStringReq(ctl, cmd, "path", &path) < 0)
         goto cleanup;

-    if (vshCommandOptUL(cmd, "bandwidth", &bandwidth) < 0) {
+    if (vshCommandOptULWrap(cmd, "bandwidth", &bandwidth) < 0) {
         vshError(ctl, "%s", _("bandwidth must be a number"));
         goto cleanup;
     }
@@ -9223,7 +9223,7 @@ cmdMigrateSetMaxSpeed(vshControl *ctl, const vshCmd *cmd)
     if (!(dom = vshCommandOptDomain(ctl, cmd, NULL)))
         return false;

-    if (vshCommandOptUL(cmd, "bandwidth", &bandwidth) < 0) {
+    if (vshCommandOptULWrap(cmd, "bandwidth", &bandwidth) < 0) {
         vshError(ctl, "%s", _("migrate: Invalid bandwidth"));
         goto done;
     }
diff --git a/tools/virsh.c b/tools/virsh.c
index cbab6b0..77a4f99 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -1547,6 +1547,28 @@ vshCommandOptUIntWrap(const vshCmd *cmd, const char *name, unsigned int *value)
     return vshCommandOptUIntInternal(cmd, name, value, true);
 }

+static int
+vshCommandOptULInternal(const vshCmd *cmd,
+                        const char *name,
+                        unsigned long *value,
+                        bool wrap)
+{
+    vshCmdOpt *arg;
+    int ret;
+
+    if ((ret = vshCommandOpt(cmd, name, &arg, true)) <= 0)
+        return ret;
+
+    if (wrap) {
+        if (virStrToLong_ul(arg->data, NULL, 10, value) < 0)
+            return -1;
+    } else {
+        if (virStrToLong_ulp(arg->data, NULL, 10, value) < 0)
+            return -1;
+    }
+
+    return 1;
+}

 /*
  * vshCommandOptUL:
@@ -1560,16 +1582,22 @@ vshCommandOptUIntWrap(const vshCmd *cmd, const char *name, unsigned int *value)
 int
 vshCommandOptUL(const vshCmd *cmd, const char *name, unsigned long *value)
 {
-    vshCmdOpt *arg;
-    int ret;
-
-    ret = vshCommandOpt(cmd, name, &arg, true);
-    if (ret <= 0)
-        return ret;
+    return vshCommandOptULInternal(cmd, name, value, false);
+}

-    if (virStrToLong_ul(arg->data, NULL, 10, value) < 0)
-        return -1;
-    return 1;
+/**
+ * vshCommandOptULWrap:
+ * @cmd command reference
+ * @name option name
+ * @value result
+ *
+ * Convert option to unsigned long, wraps negative numbers to positive
+ * See vshCommandOptInt()
+ */
+int
+vshCommandOptULWrap(const vshCmd *cmd, const char *name, unsigned long *value)
+{
+    return vshCommandOptULInternal(cmd, name, value, true);
 }

 /**
diff --git a/tools/virsh.h b/tools/virsh.h
index 9afbbb5..4f5c336 100644
--- a/tools/virsh.h
+++ b/tools/virsh.h
@@ -291,6 +291,9 @@ int vshCommandOptUIntWrap(const vshCmd *cmd, const char *name,
 int vshCommandOptUL(const vshCmd *cmd, const char *name,
                     unsigned long *value)
     ATTRIBUTE_NONNULL(3) ATTRIBUTE_RETURN_CHECK;
+int vshCommandOptULWrap(const vshCmd *cmd, const char *name,
+                        unsigned long *value)
+    ATTRIBUTE_NONNULL(3) ATTRIBUTE_RETURN_CHECK;
 int vshCommandOptString(const vshCmd *cmd, const char *name,
                         const char **value)
     ATTRIBUTE_NONNULL(3) ATTRIBUTE_RETURN_CHECK;
-- 
1.9.3