gnubin 中的错误链接但仍然有效

gnubin 中的错误链接但仍然有效

我检查目录ls -l /usr/local/opt/coreutils/libexec/gnubin并附带

$ ls -l /usr/local/opt/coreutils/libexec/gnubin
total 0
lrwxr-xr-x 1 me admin 12 Oct 27 12:50 '[' -> '../../bin/g['
lrwxr-xr-x 1 me admin 16 Oct 27 12:50  b2sum -> ../../bin/gb2sum
lrwxr-xr-x 1 me admin 17 Oct 27 12:50  base32 -> ../../bin/gbase32
lrwxr-xr-x 1 me admin 17 Oct 27 12:50  base64 -> ../../bin/gbase64
lrwxr-xr-x 1 me admin 19 Oct 27 12:50  basename -> ../../bin/gbasename
lrwxr-xr-x 1 me admin 14 Oct 27 12:50  cat -> ../../bin/gcat
....

仔细地看透它

`rwxr-xr-x 1 me admin 16 Oct 27 12:50  b2sum -> ../../bin/gb2sum`

它表明b2sum链接到它的祖父母文件夹,

$ pwd
/usr/local/opt/coreutils/libexec/gnubin
$ cd ../..
$ pwd
/usr/local/opt/coreutils
$ ls | grep gb2sum
# return nothing

实际上,不存在这样的函数gb2sum,它驻留在

$ which gb2sum
/usr/local/bin/gb2sum

地址没有关系../../bin/gb2sum,为什么链接显示为lrwxr-xr-x 1 me admin 16 Oct 27 12:50 b2sum -> ../../bin/gb2sum

答案1

我相信您忽略了符号链接路径的一个组成部分:

rwxr-xr-x 1 me admin 16 Oct 27 12:50  b2sum -> ../../bin/gb2sum
                                                     ^----------here                 

您已经完成了这些../..部分,但没有执行以下任一操作:

ls -l bin/gb2sum

或者

cd bin
ls -l gb2sum

很可能这种情况/usr/local/bin/gb2sum本身就是一个符号链接,导致/usr/local/opt/coreutils/bin/gb2sum.

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