实战Linux编程的原代码,希望对学驱动的人能有所帮助

				#!/bin/sh				# ensure that false exits nonzero even with --help or --version								if test "$VERBOSE" = yes; then				  set -x				  false --version				fi								pwd=`pwd`				t0=`echo "$0"|sed 's,.*/,,'`.tmp; tmp=$t0/$$				trap 'status=$?; cd $pwd; chmod -R u+rwx $t0; rm -rf $t0 && exit $status' 0				trap '(exit $?); exit $?' 1 2 13 15								framework_failure=0				mkdir -p $tmp || framework_failure=1				cd $tmp || framework_failure=1								if test $framework_failure = 1; then				  echo "$0: failure in testing framework" 1>&2				  (exit 1); exit 1				fi								fail=0								false --version > /dev/null && fail=1				false --help > /dev/null && fail=1								(exit $fail); exit $fail