a72a35790d
- nspawn create empty /etc/resolv.conf if necessary - python wrapper: add sd_journal_add_conjunction() - fix s390 booting Resolves: rhbz#953217
59 lines
2.1 KiB
Diff
59 lines
2.1 KiB
Diff
From f333fbb1efc2f32527f78cbdb003d59bae01aa07 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
|
|
Date: Wed, 17 Apr 2013 14:13:09 -0400
|
|
Subject: [PATCH] nspawn: create empty /etc/resolv.conf if necessary
|
|
|
|
nspawn will overmount resolv.conf if it exists. Since e.g.
|
|
default install with yum doesn't create /etc/resolv.conf,
|
|
a container created with yum will not have network. This
|
|
seems undesirable, and since we overmount the file anyway,
|
|
let's create it too.
|
|
|
|
Also, mounting a read-write /etc/resolv.conf in the container
|
|
is treated as a failure, since it makes it possible to
|
|
modify hosts /etc/resolv.conf from inside the container.
|
|
---
|
|
src/nspawn/nspawn.c | 17 ++++++++++++-----
|
|
1 file changed, 12 insertions(+), 5 deletions(-)
|
|
|
|
diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
|
|
index f57c75f..5a43d5e 100644
|
|
--- a/src/nspawn/nspawn.c
|
|
+++ b/src/nspawn/nspawn.c
|
|
@@ -492,7 +492,8 @@ static int setup_timezone(const char *dest) {
|
|
}
|
|
|
|
static int setup_resolv_conf(const char *dest) {
|
|
- char *where;
|
|
+ char _cleanup_free_ *where = NULL;
|
|
+ _cleanup_close_ int fd = -1;
|
|
|
|
assert(dest);
|
|
|
|
@@ -504,12 +505,18 @@ static int setup_resolv_conf(const char *dest) {
|
|
if (!where)
|
|
return log_oom();
|
|
|
|
+ fd = open(where, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0644);
|
|
+
|
|
/* We don't really care for the results of this really. If it
|
|
* fails, it fails, but meh... */
|
|
- if (mount("/etc/resolv.conf", where, "bind", MS_BIND, NULL) >= 0)
|
|
- mount("/etc/resolv.conf", where, "bind", MS_BIND|MS_REMOUNT|MS_RDONLY, NULL);
|
|
-
|
|
- free(where);
|
|
+ if (mount("/etc/resolv.conf", where, "bind", MS_BIND, NULL) < 0)
|
|
+ log_warning("Failed to bind mount /etc/resolv.conf: %m");
|
|
+ else
|
|
+ if (mount("/etc/resolv.conf", where, "bind",
|
|
+ MS_BIND|MS_REMOUNT|MS_RDONLY, NULL) < 0) {
|
|
+ log_error("Failed to remount /etc/resolv.conf readonly: %m");
|
|
+ return -errno;
|
|
+ }
|
|
|
|
return 0;
|
|
}
|
|
--
|
|
1.8.2
|
|
|