restore-wd

来自「实战Linux编程的原代码,希望对学驱动的人能有所帮助」· 代码 · 共 33 行

#!/bin/sh
# due to a bug in glibc's ftw.c, in some cases, nftw w/FTW_CHDIR
# would not restore the working directory.

if test "$VERBOSE" = yes; then
  set -x
  du --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
mkdir a b || framework_failure=1

if test $framework_failure = 1; then
  echo "$0: failure in testing framework" 1>&2
  (exit 1); exit 1
fi

fail=0

# With du from coreutils-4.5.5 and 4.5.6, this would fail with
# du: `b': No such file or directory

du a b > out || fail=1

(exit $fail); exit $fail