From a9fc13b2aee55655d58fcb77a3180fa99f96438a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Draszik?= <andre.draszik@jci.com>
Date: Wed, 28 Mar 2018 16:45:05 +0100
Subject: [PATCH] update-ca-certificates: use relative symlinks from
 $ETCCERTSDIR
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update-ca-certificates symlinks (trusted) certificates
from $CERTSDIR or $LOCALCERTSDIR into $ETCCERTSDIR.
update-ca-certificates can call hook scripts installed
into /etc/ca-certificates/update.d. Those scripts are
passed the pem file in /etc/ssl/certs/ that was added or
removed in this run and those pem files are absolute
symlinks into $CERTSDIR or $LOCALCERTSDIR at the moment.

When running update-ca-certificates during image build
time, they thusly all point into the host's file system,
not into the $SYSROOT. This means:
* the host's file system layout must match the one
  produced by OE, and
* it also means that the host must have installed the same
  (or more) certificates as the target in $CERTSDIR and
  $LOCALCERTSDIR

This is a problem when wanting to execute hook scripts,
because they all need to be taught about $SYSROOT, and
behave differently depending on whether they're called
at image build time, or on the target, as otherwise they
will be trying to actually read the host's certificates
from $CERTSDIR or $LOCALCERTSDIR.

This also is a problem when running anything else during
image build time that depends on the trusted CA
certificates.

Changing the symlink to be relative solves all of these
problems. Do so.

Upstream-Status: Inappropriate [OE-specific]
Signed-off-by: André Draszik <andre.draszik@jci.com>
---
 sbin/update-ca-certificates | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sbin/update-ca-certificates b/sbin/update-ca-certificates
index 00f80c7..7e911a9 100755
--- a/sbin/update-ca-certificates
+++ b/sbin/update-ca-certificates
@@ -29,6 +29,7 @@ CERTSDIR=$SYSROOT/usr/share/ca-certificates
 LOCALCERTSDIR=$SYSROOT/usr/local/share/ca-certificates
 CERTBUNDLE=ca-certificates.crt
 ETCCERTSDIR=$SYSROOT/etc/ssl/certs
+FSROOT=../../../ # to get from $ETCCERTSDIR to the root of the file system
 HOOKSDIR=$SYSROOT/etc/ca-certificates/update.d
 
 while [ $# -gt 0 ];
@@ -125,9 +126,10 @@ add() {
   PEM="$ETCCERTSDIR/$(basename "$CERT" .crt | sed -e 's/ /_/g' \
                                                   -e 's/[()]/=/g' \
                                                   -e 's/,/_/g').pem"
-  if ! test -e "$PEM" || [ "$(readlink "$PEM")" != "${CERT##$SYSROOT}" ]
+  DST="$(echo ${CERT} | sed -e "s|^$SYSROOT||" -e "s|^/|$FSROOT|" )"
+  if ! test -e "$PEM" || [ "$(readlink "$PEM")" != "${DST}" ]
   then
-    ln -sf "${CERT##$SYSROOT}" "$PEM"
+    ln -sf "${DST}" "$PEM"
     echo "+$PEM" >> "$ADDED"
   fi
   # Add trailing newline to certificate, if it is missing (#635570)
