[libvirt] [PATCH 1/8] virsh: Introduce macros to reject mutually exclusive arguments
This patch adds three macros to the virsh source tree that help to
easily check for mutually exclusive parameters.
VSH_EXCLUSIVE_OPTIONS_EXPR has four arguments, two expressions to check
and two names of the parameters to print in the message.
VSH_EXCLUSIVE_OPTIONS is more specific and check the command structure
for the parameters using vshCommandOptBool.
VSH_EXCLUSIVE_OPTIONS_VAR is meant to check boolean variables with the
same name as the parameters.
---
po/POTFILES.in | 1 +
tools/virsh.h | 42 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 43 insertions(+)
diff --git a/po/POTFILES.in b/po/POTFILES.in
index bd2c02e..7a2da8f 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -204,6 +204,7 @@ src/xenxs/xen_xm.c
tools/console.c
tools/libvirt-guests.sh.in
tools/virsh.c
+tools/virsh.h
tools/virsh-domain-monitor.c
tools/virsh-domain.c
tools/virsh-edit.c
diff --git a/tools/virsh.h b/tools/virsh.h
index fec9785..410d859 100644
--- a/tools/virsh.h
+++ b/tools/virsh.h
@@ -375,4 +375,46 @@ char *_vshStrdup(vshControl *ctl, const char *s, const char
*filename,
# define realloc use_vshRealloc_instead_of_realloc
# define strdup use_vshStrdup_instead_of_strdup
+/* Macros to help dealing with mutually exclusive options. */
+
+/* VSH_EXCLUSIVE_OPTIONS_EXPR:
+ *
+ * @NAME1: String containing the name of the option.
+ * @EXPR1: Expression to validate the variable (boolean variable)
+ * @NAME2: String containing the name of the option.
+ * @EXPR2: Expression to validate the variable (boolean variable)
+ *
+ * Reject mutually exclusive command options in virsh. Use the
+ * provided expression to check the variables.
+ */
+# define VSH_EXCLUSIVE_OPTIONS_EXPR(NAME1, EXPR1, NAME2, EXPR2) \
+ if ((EXPR1) && (EXPR2)) { \
+ vshError(ctl, _("Options --%s and --%s are mutually exclusive"), \
+ NAME1, NAME2); \
+ return false; \
+ }
+
+/* VSH_EXCLUSIVE_OPTIONS:
+ *
+ * @NAME1: String containing the name of the option.
+ * @NAME2: String containing the name of the option.
+ *
+ * Reject mutually exclusive command options in virsh. Use the
+ * vshCommandOptBool call to request them.
+ */
+# define VSH_EXCLUSIVE_OPTIONS(NAME1, NAME2) \
+ VSH_EXCLUSIVE_OPTIONS_EXPR(NAME1, vshCommandOptBool(cmd, NAME1), \
+ NAME2, vshCommandOptBool(cmd, NAME2))
+
+/* VSH_EXCLUSIVE_OPTIONS_VAR:
+ *
+ * @VARNAME1: Boolean variable containing the value of the option of same name
+ * @VARNAME2: Boolean variable containing the value of the option of same name
+ *
+ * Reject mutually exclusive command options in virsh. Check in variables that
+ * contain the value and have same name as the option.
+ */
+# define VSH_EXCLUSIVE_OPTIONS_VAR(VARNAME1, VARNAME2) \
+ VSH_EXCLUSIVE_OPTIONS_EXPR(#VARNAME1, VARNAME1, #VARNAME2, VARNAME2)
+
#endif /* VIRSH_H */
--
1.8.1.1