linux - 确定shell程序中的相对路径还是绝对路径

Question

如标题所述，如果路径是相对路径还是绝对路径，我需要确定何时运行程序：

./program #relative
dir/dir2/program #relative
~User/dir/dir2/program #absolute
/home/User/dir/dir2/program #absolute

这是我的测试用例。我怎么能在 shell 程序中做这件事呢？

或者更一般地说，在这种情况下，如何检查路径$0是相对的还是绝对的？

score 30 · Accepted Answer

30

if [[ "$0" = /* ]]
then
   : # Absolute path
else
   : # Relative path
fi

于 2012-07-09T22:06:51.707 回答

score 19 · Accepted Answer

any 的通用解决方案$path，而不仅仅是$0

[ "$path" != "${path#/}" ] && echo "absolute" || echo "relative"

score 7 · Accepted Answer

case "$directory" in
   /*)
      echo "absolute"
      ;;
   *)
      echo "relative"
      ;;
esac

score -2 · Accepted Answer

-2

if [ ${path:0:1} == / ]
then
     echo Absolute path
else
     echo Non-absolute path
fi

于 2017-01-26T13:38:38.823 回答

4 回答 4