From 72416330e803df3e2b445d408fc9dec35d351a74 Mon Sep 17 00:00:00 2001
From: Aditya <bluenerd@protonmail.com>
Date: Sat, 14 Jan 2023 21:29:19 +0530
Subject: [PATCH] Add 8.78 - Remove debug symbols

---
 scripts/chapter8/8.78-stripping.sh | 56 ++++++++++++++++++++++++++++++
 scripts/main.sh                    | 12 +++++++
 2 files changed, 68 insertions(+)
 create mode 100644 scripts/chapter8/8.78-stripping.sh

diff --git a/scripts/chapter8/8.78-stripping.sh b/scripts/chapter8/8.78-stripping.sh
new file mode 100644
index 0000000..c789437
--- /dev/null
+++ b/scripts/chapter8/8.78-stripping.sh
@@ -0,0 +1,56 @@
+#!/bin/bash
+
+save_usrlib="$(cd /usr/lib; ls ld-linux*[^g])
+             libc.so.6
+             libthread_db.so.1
+             libquadmath.so.0.0.0
+             libstdc++.so.6.0.30
+             libitm.so.1.0.0
+             libatomic.so.1.2.0"
+
+cd /usr/lib
+
+for LIB in $save_usrlib; do
+    objcopy --only-keep-debug $LIB $LIB.dbg
+    cp $LIB /tmp/$LIB
+    strip --strip-unneeded /tmp/$LIB
+    objcopy --add-gnu-debuglink=$LIB.dbg /tmp/$LIB
+    install -vm755 /tmp/$LIB /usr/lib
+    rm /tmp/$LIB
+done
+
+online_usrbin="bash find strip"
+online_usrlib="libbfd-2.39.so
+               libhistory.so.8.1
+               libncursesw.so.6.3
+               libm.so.6
+               libreadline.so.8.1
+               libz.so.1.2.12
+               $(cd /usr/lib; find libnss*.so* -type f)"
+
+for BIN in $online_usrbin; do
+    cp /usr/bin/$BIN /tmp/$BIN
+    strip --strip-unneeded /tmp/$BIN
+    install -vm755 /tmp/$BIN /usr/bin
+    rm /tmp/$BIN
+done
+
+for LIB in $online_usrlib; do
+    cp /usr/lib/$LIB /tmp/$LIB
+    strip --strip-unneeded /tmp/$LIB
+    install -vm755 /tmp/$LIB /usr/lib
+    rm /tmp/$LIB
+done
+
+for i in $(find /usr/lib -type f -name \*.so* ! -name \*dbg) \
+         $(find /usr/lib -type f -name \*.a)                 \
+         $(find /usr/{bin,sbin,libexec} -type f); do
+    case "$online_usrbin $online_usrlib $save_usrlib" in
+        *$(basename $i)* )
+            ;;
+        * ) strip --strip-unneeded $i
+            ;;
+    esac
+done
+
+unset BIN LIB save_usrlib online_usrbin online_usrlib
diff --git a/scripts/main.sh b/scripts/main.sh
index 7c3d50f..43922f2 100644
--- a/scripts/main.sh
+++ b/scripts/main.sh
@@ -1462,3 +1462,15 @@ then
 	stop_script "chapter8/8.76-sysvinit.sh"
 fi
 
+# Chapter 8.78
+# ============
+echo "Stripping debug symbols"
+su -c "bash $SCRIPT/chapter8/8.78-stripping.sh"
+
+# Exit on error
+check_exit_code
+if [ $exit_status -ne 0 ]
+then
+	stop_script "chapter8/8.78-stripping.sh"
+fi
+