已经有很多答案了，但没有一个对我有用……这就是我现在用的。

readlink_f() {
  local target="$1"
  [ -f "$target" ] || return 1 #no nofile

  while [ -L "$target" ]; do
    target="$(readlink "$target")" 
  done
  echo "$(cd "$(dirname "$target")"; pwd -P)/$target"
}

这个呢?

function readlink() {
  DIR="${1%/*}"
  (cd "$DIR" && echo "$(pwd -P)")
}

MacPorts和Homebrew提供了包含greadlink (GNU readlink)的coreutils包。这要归功于Michael Kallweitt在mackb.com上的帖子。

brew install coreutils

greadlink -f file.txt

开始更新

This is such a frequent problem that we have put together a Bash 4 library for free use (MIT License) called realpath-lib. This is designed to emulate readlink -f by default and includes two test suites to verify (1) that it works for a given unix system and (2) against readlink -f if installed (but this is not required). Additionally, it can be used to investigate, identify and unwind deep, broken symlinks and circular references, so it can be a useful tool for diagnosing deeply-nested physical or symbolic directory and file problems. It can be found at github.com or bitbucket.org.

最后更新

另一个非常紧凑和高效的解决方案，它只依赖于Bash:

function get_realpath() {

    [[ ! -f "$1" ]] && return 1 # failure : file does not exist.
    [[ -n "$no_symlinks" ]] && local pwdp='pwd -P' || local pwdp='pwd' # do symlinks.
    echo "$( cd "$( echo "${1%/*}" )" 2>/dev/null; $pwdp )"/"${1##*/}" # echo result.
    return 0 # success

}

这还包括一个环境设置no_symlinks，它提供了将符号链接解析到物理系统的能力。只要no_symlinks被设置为某个值，即no_symlinks='on'，那么symlinks将被解析为物理系统。否则将应用它们(默认设置)。

这应该可以在任何提供Bash的系统上工作，并将返回一个与Bash兼容的退出代码用于测试。

我个人做了一个叫realpath的脚本，看起来有点像:

#!/usr/bin/env python
import os, sys
print(os.path.realpath(sys.argv[1]))

readlink的路径在我的系统和你的系统之间是不同的。请尝试指定完整路径:

/西南/ sbin / readlink -f