From 29d296bbe3ce769d64f90a08ba0e091725140704 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Sun, 24 Sep 2017 14:27:21 +0200
Subject: [PATCH] fileio: return 0 from read_one_line_file on success

Fixup for f4b51a2d09. Suggested by Evgeny Vereshchagin.

(cherry picked from commit 2e33df93dee35af986683d1226f93e0f9659de5d)

Resolves: #1503106
---
 src/shared/fileio.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/shared/fileio.c b/src/shared/fileio.c
index 4880a4941..65a0753c2 100644
--- a/src/shared/fileio.c
+++ b/src/shared/fileio.c
@@ -109,6 +109,7 @@ int write_string_file_atomic(const char *fn, const char *line) {
 
 int read_one_line_file(const char *fn, char **line) {
         _cleanup_fclose_ FILE *f = NULL;
+        int r;
 
         assert(fn);
         assert(line);
@@ -117,7 +118,8 @@ int read_one_line_file(const char *fn, char **line) {
         if (!f)
                 return -errno;
 
-        return read_line(f, LONG_LINE_MAX, line);
+        r = read_line(f, LONG_LINE_MAX, line);
+        return r < 0 ? r : 0;
 }
 
 int read_full_stream(FILE *f, char **contents, size_t *size) {