We have "exec /bin/bash" in Bash instruction, so it's no matter
about the chroot command used. We can explicitly check which shell
is currently used.
And, use a simple "exec /tools/bin/bash" instead of reentering
the chroot.
--
Xi Ruoyao <[email protected]>
School of Aerospace Science and Technology, Xidian University
From d528a1e7bbff3163027a92e1cdf6b2e31838f3e4 Mon Sep 17 00:00:00 2001
From: Xi Ruoyao <[email protected]>
Date: Fri, 27 Apr 2018 20:07:55 +0800
Subject: [PATCH] Revise command to use temporary shell in "Stripping Again"
We have "exec /bin/bash" in Bash instruction, so it's no matter
about the chroot command used. We can explicitly check which shell
we are using.
And, use a simple "exec /tools/bin/bash" instead of reentering
the chroot.
---
chapter06/strippingagain.xml | 19 ++++++-------------
1 file changed, 6 insertions(+), 13 deletions(-)
diff --git a/chapter06/strippingagain.xml b/chapter06/strippingagain.xml
index db4a605b..df4edf49 100644
--- a/chapter06/strippingagain.xml
+++ b/chapter06/strippingagain.xml
@@ -58,20 +58,13 @@ done
unset LIB save_lib save_usrlib</userinput></screen>
<para>Before performing the stripping, take special care to ensure that
- none of the binaries that are about to be stripped are running. If
- unsure whether the user entered chroot with the command given in
- <xref linkend="ch-system-chroot" role=","/> first exit from
- chroot:</para>
+ none of the binaries that are about to be stripped are running. If the
+ current shell is in /bin, we must replace it with the temporary shell
+ in /tools/bin:</para>
-<screen role="nodump"><userinput>logout</userinput></screen>
-
- <para>Then reenter it with:</para>
-
-<screen role="nodump"><userinput>chroot $LFS /tools/bin/env -i \
- HOME=/root TERM=$TERM \
- PS1='(lfs chroot) \u:\w\$ ' \
- PATH=/bin:/usr/bin:/sbin:/usr/sbin \
- /tools/bin/bash --login</userinput></screen>
+<screen role="nodump"><userinput>case $(readlink /proc/$$/exe) in /bin/*)
+ exec /tools/bin/bash --login
+esac</userinput></screen>
<para>Now the binaries and libraries can be safely stripped:</para>
--
2.16.2
--
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