From: Jan Klötzke <Jan.Kloetzke@preh.de>
Date: Wed, 10 Jan 2018 09:36:14 +0000 (+0100)
Subject: tree-wide: introduce disable_core_dumps helper and port existing users
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=24a814a265d2f68811bf3bdbc65e67d6c219aaa8;p=elogind.git

tree-wide: introduce disable_core_dumps helper and port existing users

Changes the core_pattern to prevent any core dumps by the kernel. Does
nothing if we're in a container environment as this is system wide
setting.
---

diff --git a/src/basic/util.c b/src/basic/util.c
index a7cc3ecfb..f60f60b02 100644
--- a/src/basic/util.c
+++ b/src/basic/util.c
@@ -61,6 +61,7 @@
 #include "umask-util.h"
 #include "user-util.h"
 #include "util.h"
+//#include "virt.h"
 
 int saved_argc = 0;
 char **saved_argv = NULL;
@@ -625,3 +626,9 @@ int str_verscmp(const char *s1, const char *s2) {
 
         return strcmp(os1, os2);
 }
+
+/* Turn off core dumps but only if we're running outside of a container. */
+void disable_core_dumps(void) {
+        if (detect_container() <= 0)
+                (void) write_string_file("/proc/sys/kernel/core_pattern", "|/bin/false", 0);
+}
diff --git a/src/basic/util.h b/src/basic/util.h
index f9432ebb5..643ce3bc4 100644
--- a/src/basic/util.h
+++ b/src/basic/util.h
@@ -205,3 +205,5 @@ int version(void);
 #if 0 /// UNNEEDED by elogind
 #endif // 0
 int str_verscmp(const char *s1, const char *s2);
+
+void disable_core_dumps(void);