fileio: return 0 from read_one_line_file on success

Fixup for f4b51a2d09. Suggested by Evgeny Vereshchagin.

diff --git a/src/basic/fileio.c b/src/basic/fileio.c
index 13c9a224a1c39b6734c0caa1a418b31a8638ace2..60b34f1257390cac7f488ff6055876f328fecb3d 100644 (file)
--- a/src/basic/fileio.c
+++ b/src/basic/fileio.c
@@ -176,6 +176,7 @@ fail:
 
 int read_one_line_file(const char *fn, char **line) {
         _cleanup_fclose_ FILE *f = NULL;
+        int r;
 
         assert(fn);
         assert(line);
@@ -184,7 +185,8 @@ 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 verify_file(const char *fn, const char *blob, bool accept_extra_nl) {