From 022cb8bb2028571b9119fd4ae95c87c96f816d6c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Tue, 18 Oct 2022 18:09:06 +0200
Subject: [PATCH] shared/json: allow json_variant_dump() to return an error

(cherry picked from commit 7922ead507e0d83e4ec72a8cbd2b67194766e58c)

Related: #2149074
---
 src/shared/json.c | 7 ++++---
 src/shared/json.h | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/shared/json.c b/src/shared/json.c
index bcc109abc2..f91738227b 100644
--- a/src/shared/json.c
+++ b/src/shared/json.c
@@ -1768,9 +1768,9 @@ int json_variant_format(JsonVariant *v, JsonFormatFlags flags, char **ret) {
         return (int) sz - 1;
 }
 
-void json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const char *prefix) {
+int json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const char *prefix) {
         if (!v)
-                return;
+                return 0;
 
         if (!f)
                 f = stdout;
@@ -1796,7 +1796,8 @@ void json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const cha
                 fputc('\n', f); /* In case of SSE add a second newline */
 
         if (flags & JSON_FORMAT_FLUSH)
-                fflush(f);
+                return fflush_and_check(f);
+        return 0;
 }
 
 int json_variant_filter(JsonVariant **v, char **to_remove) {
diff --git a/src/shared/json.h b/src/shared/json.h
index dd73c1e497..e4bfeae8f5 100644
--- a/src/shared/json.h
+++ b/src/shared/json.h
@@ -195,7 +195,7 @@ typedef enum JsonFormatFlags {
 } JsonFormatFlags;
 
 int json_variant_format(JsonVariant *v, JsonFormatFlags flags, char **ret);
-void json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const char *prefix);
+int json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const char *prefix);
 
 int json_variant_filter(JsonVariant **v, char **to_remove);