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-rw-r--r--util/error.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/util/error.c b/util/error.c
index cdb726c..9dd474f 100644
--- a/util/error.c
+++ b/util/error.c
@@ -20,6 +20,7 @@ struct Error
ErrorClass err_class;
const char *src, *func;
int line;
+ GString *hint;
};
Error *error_abort;
@@ -115,6 +116,28 @@ void error_setg_file_open_internal(Error **errp,
"Could not open '%s'", filename);
}
+void error_append_hint(Error **errp, const char *fmt, ...)
+{
+ va_list ap;
+ int saved_errno = errno;
+ Error *err;
+
+ if (!errp) {
+ return;
+ }
+ err = *errp;
+ assert(err && errp != &error_abort);
+
+ if (!err->hint) {
+ err->hint = g_string_new(NULL);
+ }
+ va_start(ap, fmt);
+ g_string_append_vprintf(err->hint, fmt, ap);
+ va_end(ap);
+
+ errno = saved_errno;
+}
+
#ifdef _WIN32
void error_setg_win32_internal(Error **errp,
@@ -151,6 +174,9 @@ Error *error_copy(const Error *err)
err_new = g_malloc0(sizeof(*err));
err_new->msg = g_strdup(err->msg);
err_new->err_class = err->err_class;
+ if (err->hint) {
+ err_new->hint = g_string_new(err->hint->str);
+ }
return err_new;
}
@@ -168,6 +194,9 @@ const char *error_get_pretty(Error *err)
void error_report_err(Error *err)
{
error_report("%s", error_get_pretty(err));
+ if (err->hint) {
+ error_printf_unless_qmp("%s\n", err->hint->str);
+ }
error_free(err);
}
@@ -175,6 +204,9 @@ void error_free(Error *err)
{
if (err) {
g_free(err->msg);
+ if (err->hint) {
+ g_string_free(err->hint, true);
+ }
g_free(err);
}
}
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