Signed-off-by: Wenchao Xia <xiaw...@linux.vnet.ibm.com>
---
include/qapi/error.h | 6 ++++++
util/error.c | 21 +++++++++++++++++++++
2 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/include/qapi/error.h b/include/qapi/error.h
index 7d4c696..bcfb724 100644
--- a/include/qapi/error.h
+++ b/include/qapi/error.h
@@ -30,6 +30,12 @@ typedef struct Error Error;
void error_set(Error **err, ErrorClass err_class, const char *fmt, ...)
GCC_FMT_ATTR(3, 4);
/**
+ * Append message to err if err != NULL && *err != NULL. "\n" will be inserted
+ * after old message.
+ */
+void error_append(Error **err, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
+
+/**
* Set an indirect pointer to an error given a ErrorClass value and a
* printf-style human message, followed by a strerror() string if
* @os_error is not zero.
diff --git a/util/error.c b/util/error.c
index 3ee362a..64bbb2d 100644
--- a/util/error.c
+++ b/util/error.c
@@ -46,6 +46,27 @@ void error_set(Error **errp, ErrorClass err_class, const
char *fmt, ...)
errno = saved_errno;
}
+void error_append(Error **err, const char *fmt, ...)
+{
+ va_list ap;
+ gchar *msg, *msg_old;
+
+ if (!err || !*err) {
+ return;
+ }
+
+ va_start(ap, fmt);
+ msg = g_strdup_vprintf(fmt, ap);
+ va_end(ap);
+
+ msg_old = (*err)->msg;
+ (*err)->msg = g_strdup_printf("%s\n%s", msg_old, msg);
+
+ g_free(msg);
+ g_free(msg_old);
+
+}
+
void error_set_errno(Error **errp, int os_errno, ErrorClass err_class,
const char *fmt, ...)
{
--
1.7.1
