File kdump-install-etc-resolv.conf-using-resolved-path.patch of Package kdump.21349

Date: Thu Mar 25 12:43:32 2021 +0100
From: Petr Pavlu <petr.pavlu@suse.com>
Subject: Install /etc/resolv.conf using its resolved path
References: bsc#1183070
Upstream: merged
Git-commit: b8439e03d4479f3ffa4b42961a5da18f4b819122

Resolve /etc/resolv.conf first to install directly the target file if it
is a symlink. This simplifies the setup and avoids any problems when the
real resolv.conf could be in a location that gets hidden by a mount done
in the kdump environment, for instance, /etc/resolv.conf ->
/run/netconfig/resolv.conf with tmpfs getting mounted on /run.

---
 init/module-setup.sh |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

--- a/init/module-setup.sh
+++ b/init/module-setup.sh
@@ -334,7 +334,15 @@ install() {
 
     inst_multiple makedumpfile makedumpfile-R.pl kdumptool \
 	$KDUMP_REQUIRED_PROGRAMS
-    inst_simple /etc/resolv.conf
+
+    # Install /etc/resolv.conf to provide initial DNS configuration. The file
+    # is resolved first to install directly the target file if it is a symlink.
+    # The real resolv.conf could be in a location that gets hidden by a mount
+    # done in the kdump environment, for instance, /etc/resolv.conf ->
+    # /run/netconfig/resolv.conf with tmpfs getting mounted on /run.
+    local resolv=$(realpath /etc/resolv.conf)
+    inst_simple "$resolv" /etc/resolv.conf
+
     inst_simple /usr/share/zoneinfo/UTC
     inst_simple /etc/localtime
 }