From 65b3903ff576488eaabb51d3c4fbf9c73d867d7c Mon Sep 17 00:00:00 2001
From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Sat, 25 Jan 2014 23:35:28 -0500
Subject: journal: guarantee async-signal-safety in sd_journald_sendv

signal(7) provides a list of functions which may be called from a
signal handler. Other functions, which only call those functions and
don't access global memory and are reentrant are also safe.
sd_j_sendv was mostly OK, but would call mkostemp and writev in a
fallback path, which are unsafe.

Being able to call sd_j_sendv in a async-signal-safe way is important
because it allows it be used in signal handlers.

Safety is achieved by replacing mkostemp with open(O_TMPFILE) and an
open-coded writev replacement which uses write. Unfortunately,
O_TMPFILE is only available on kernels >= 3.11. When O_TMPFILE is
unavailable, an open-coded mkostemp is used.

https://bugzilla.gnome.org/show_bug.cgi?id=722889
---
 Makefile.am | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'Makefile.am')

diff --git a/Makefile.am b/Makefile.am
index 23f7d2fba6..49ac55fee1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1126,6 +1126,7 @@ tests += \
 	test-utf8 \
 	test-ellipsize \
 	test-util \
+	test-tmpfiles \
 	test-namespace \
 	test-date \
 	test-sleep \
@@ -1232,6 +1233,12 @@ test_util_SOURCES = \
 test_util_LDADD = \
 	libsystemd-core.la
 
+test_tmpfiles_SOURCES = \
+	src/test/test-tmpfiles.c
+
+test_tmpfiles_LDADD = \
+	libsystemd-shared.la
+
 test_namespace_SOURCES = \
 	src/test/test-namespace.c
 
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