Changeset 17fe56e1

Timestamp:

01/06/2023 09:13:50 PM (16 months ago)

Author:

Bruce Dubbs <bdubbs@…>

Branches:

11.3, 12.0, 12.1, kea, ken/TL2024, ken/inkscape-core-mods, ken/tuningfonts, lazarus, lxqt, plabs/newcss, plabs/python-mods, python3.11, qt5new, rahul/power-profiles-daemon, renodr/vulkan-addition, trunk, xry111/llvm18, xry111/xf86-video-removal

Children:

0ebd12a3

Parents:

9de2208

Message:

Update discussion of stripping installed files

Reformat the script and in the stripping section to make
it more clear and make it executable.

File:

• introduction/important/building-notes.xml (modified) (2 diffs)

introduction/important/building-notes.xml

@@ -573 +573 @@
 
     <para>
-      The <command>strip</command> utility changes files in place, which
-      may break anything using it if it is loaded in memory. Note that
-      if a file is in use but just removed from the disk (i.e. not overwritten
-      nor modified), this is not a problem since the kernel can use
-      <quote>deleted</quote> files.
-      Look at <filename>/proc/*/maps</filename>, and it is likely that
-      you'll see some <emphasis>(deleted)</emphasis> entries. The
-      <command>mv</command> just removes the destination file from the
-      directory but does not touch its content, so that it satisfies the
-      condition for the kernel to use the old (deleted) file. The script
-      below is just an example. Feel free to add stronger error detection,
-      other directories to scan, etcetera. It should be run as the &root; user:
-    </para>
-
-<screen role="root"><userinput>{ find /usr/lib -type f \( -name \*.a -o \
-    \( -name \*.so* ! -name \*dbg \) \)
- find /usr/{bin,sbin,libexec} -type f; } | while read file; do
-      if readelf -h $file >/dev/null 2>&amp;1; then
-        cp -a $file ${file}.tmp            &amp;&amp;
-        strip --strip-unneeded ${file}.tmp &amp;&amp;
-        mv ${file}.tmp $file
-      fi
-    done</userinput></screen>
+      The <command>strip</command> utility changes files in place, which may
+      break anything using it if it is loaded in memory. Note that if a file is
+      in use but just removed from the disk (i.e. not overwritten nor
+      modified), this is not a problem since the kernel can use
+      <quote>deleted</quote> files.  Look at <filename>/proc/*/maps</filename>
+      and it is likely that you'll see some <emphasis>(deleted)</emphasis>
+      entries. The <command>mv</command> just removes the destination file from
+      the directory but does not touch its content, so that it satisfies the
+      condition for the kernel to use the old (deleted) file. The script below
+      is just an example. 
+      It should be run as the &root; user:
+    </para>
+
+<screen><userinput>cat &gt; strip-all.sh &lt;&lt; "EOF"
+<literal>#!/bin/bash
+
+if [ $EUID -ne 0 ]; then
+  echo "Need to be root"
+  exit 1
+fi
+
+{ find /usr/lib -type f -name '*.so*' ! -name '*dbg'
+  find /usr/lib -type f -name '*.a'
+  find /usr/{bin,sbin,libexec} -type f;
+} |  while read file; do
+       if ! readelf -h $file >/dev/null 2>&amp;1; then continue; fi
+       if $( file $file | grep --quiet --invert-match 'not stripped' ); then
+         continue; 
+       fi
+
+       base=$(basename $file)
+       cp --preserve $file    ${base}.tmp
+       strip --strip-unneeded ${base}.tmp
+       mv ${base}.tmp $file
+     done</literal>
+EOF
+chmod 755 strip-all.sh</userinput></screen>
 
     <para>
@@ -601 +615 @@
       class="directory">/opt</filename> or <filename
       class="directory">/usr/local</filename>, you may want to strip the files
-      there too.
+      there too. Just add other directories to scan in the compound list of
+      <command>find</command> commands between the braces.
     </para>