create ch2 - version-check

scripts/chapter2/2.2-version-check.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+## Simple script to list version numbers of critical development tools
+
+export LC_ALL=C
+bash --version | head -n1 | cut -d" " -f2-4
+MYSH=$(readlink -f /bin/sh)
+echo "/bin/sh -> $MYSH"
+echo $MYSH | grep -q bash || echo "ERROR: /bin/sh does not point to bash"
+unset MYSH
+
+echo -n "Binutils: "; ld --version | head -n1 | cut -d" " -f3-
+bison --version | head -n1
+
+if [ -h /usr/bin/yacc ]; then
+	echo "/usr/bin/yacc -> `readlink -f /usr/bin/yacc`";
+elif [ -x /usr/bin/yacc ]; then
+	echo yacc is `/usr/bin/yacc --version | head -n1`
+else
+	echo "yacc not found"
+fi
+
+echo -n "Coreutils: "; chown --version | head -n1 | cut -d")" -f2
+diff --version | head -n1
+find --version | head -n1
+gawk --version | head -n1
+
+if [ -h /usr/bin/awk ]; then
+	echo "/usr/bin/awk -> `readlink -f /usr/bin/awk`";
+elif [ -x /usr/bin/awk ]; then
+	echo awk is `/usr/bin/awk --version | head -n1`
+else
+	echo "awk not found"
+fi
+
+gcc --version | head -n1
+g++ --version | head -n1
+grep --version | head -n1
+gzip --version | head -n1
+cat /proc/version
+m4 --version | head -n1
+make --version | head -n1
+patch --version | head -n1
+echo Perl `perl -V:version`
+python3 --version
+sed --version | head -n1
+tar --version | head -n1
+makeinfo --version | head -n1  # texinfo version
+xz --version | head -n1
+
+echo 'int main(){}' > dummy.c && g++ -o dummy dummy.c
+if [ -x dummy ]
+then echo "g++ compilation OK";
+else echo "g++ compilation failed"; fi
+rm -f dummy.c dummy

scripts/main.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+exit_status=0
+
+function check_exit_code() {
+	if [ $? -ne 0 ]
+	then
+		exit_status=1
+	else
+		exit_status=0
+	fi
+}
+
+function stop_script() {
+	echo "Script failed in $(pwd)/$1"
+	exit 1
+}
+
+echo "Chapter 2"
+echo "Checking required packages"
+bash ./chapter2/2.2-version-check.sh
+
+check_exit_code
+if [ $exit_status -ne 0 ]
+then
+	stop_script "chapter2/2.2-version-check.sh"
+fi
+