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From 29d296bbe3ce769d64f90a08ba0e091725140704 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Sun, 24 Sep 2017 14:27:21 +0200
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Subject: [PATCH] fileio: return 0 from read_one_line_file on success
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Fixup for f4b51a2d09. Suggested by Evgeny Vereshchagin.
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(cherry picked from commit 2e33df93dee35af986683d1226f93e0f9659de5d)
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Resolves: #1503106
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---
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 src/shared/fileio.c | 4 +++-
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 1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/src/shared/fileio.c b/src/shared/fileio.c
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index 4880a4941..65a0753c2 100644
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--- a/src/shared/fileio.c
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+++ b/src/shared/fileio.c
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@@ -109,6 +109,7 @@ int write_string_file_atomic(const char *fn, const char *line) {
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 int read_one_line_file(const char *fn, char **line) {
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         _cleanup_fclose_ FILE *f = NULL;
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+        int r;
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         assert(fn);
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         assert(line);
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@@ -117,7 +118,8 @@ int read_one_line_file(const char *fn, char **line) {
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         if (!f)
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                 return -errno;
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-        return read_line(f, LONG_LINE_MAX, line);
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+        r = read_line(f, LONG_LINE_MAX, line);
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+        return r < 0 ? r : 0;
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 }
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 int read_full_stream(FILE *f, char **contents, size_t *size) {