blocks|key|1159859|text|有一个realpath()+C函数可以完成这项工作，但我在命令行上看不到任何可用的东西。这里有一个快速而肮脏的替代方案：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1159860|#!/bin/bash

realpath()+{
++++[[+$1+=+/*+]]+&&+echo+"$1"+%7C%7C+echo+"$PWD/${1#./}"
}

realpath+"$0"|code-block|syntax|javascript|1159861|如果路径以/开头，则会逐字打印该路径。如果不是，它必须是一个相对路径，所以它将$PWD放在前面。#./部件从$1的前面剥离了./。|1159862|entityMap^0|3|A|0|0|5|1|13|4|1C|3|1I|2|1Q|2|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|N|$]]

There's a <code>realpath()</code> C function that'll do the job, but I'm not seeing anything available on the command-line. Here's a quick and dirty replacement:

<pre><code>#!/bin/bash

realpath() {
 [[ $1 = /* ]] &amp;&amp; echo "$1" || echo "$PWD/${1#./}"
}

realpath "$0"
</code></pre>

This prints the path verbatim if it begins with a <code>/</code>. If not it must be a relative path, so it prepends <code>$PWD</code> to the front. The <code>#./</code> part strips off <code>./</code> from the front of <code>$1</code>.

blocks|key|1160025|text|Python解决方案的一个命令行更友好的变体：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1160026|python+-c+'import+os,+sys;+print(os.path.realpath(sys.argv[1]))'+./my/path|code-block|syntax|javascript|1160027|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

A more command-line-friendly variant of the Python solution:
<pre><code>python -c 'import os, sys; print(os.path.realpath(sys.argv[1]))' ./my/path
</code></pre>

blocks|key|1159919|text|我正在寻找一种在系统配置脚本中使用的解决方案，即在安装Homebrew之前运行。如果没有合适的解决方案，我只能将任务转移到跨平台语言，例如Perl：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1159920|script_abspath=$(perl+-e+'use+Cwd+"abs_path";+print+abs_path(@ARGV[0])'+--+"$0")|code-block|syntax|javascript|1159921|更常见的情况是，我们实际需要的是包含目录：|1159922|here=$(perl+-e+'use+File::Basename;+use+Cwd+"abs_path";+print+dirname(abs_path(@ARGV[0]));'+--+"$0")|1159923|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I was looking for a solution for use in a system provision script, i.e., run before Homebrew is even installed. Lacking a proper solution I'd just offload the task to a cross-platform language, e.g., Perl:

<pre><code>script_abspath=$(perl -e 'use Cwd "abs_path"; print abs_path(@ARGV[0])' -- "$0")
</code></pre>

More often what we actually want is the containing directory:

<pre><code>here=$(perl -e 'use File::Basename; use Cwd "abs_path"; print dirname(abs_path(@ARGV[0]));' -- "$0")
</code></pre>

blocks|key|1160115|text|因为正如其他人所指出的那样，有一个realpath：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1160116|//+realpath.c
#include+<stdio.h>
#include+<stdlib.h>

int+main+(int+argc,+char*+argv[])
{
++if+(argc+>+1)+{
++++for+(int+argIter+=+1;+argIter+<+argc;+%2B%2BargIter)+{
++++++char+*resolved_path_buffer+=+NULL;
++++++char+*result+=+realpath(argv[argIter],+resolved_path_buffer);

++++++puts(result);

++++++if+(result+!=+NULL)+{
++++++++free(result);
++++++}
++++}
++}

++return+0;
}|code-block|syntax|javascript|1160117|Makefile：|1160118|#Makefile
OBJ+=+realpath.o

%25.o:+%25.c
++++++$(CC)+-c+-o+$@+$<+$(CFLAGS)

realpath:+$(OBJ)
++++++gcc+-o+$@+$%5E+$(CFLAGS)|1160119|然后用make编译，并放入一个软链接：|style|CODE|1160120|ln+-s+$(pwd)/realpath+/usr/local/bin/realpath|1160121|entityMap|0|LINK|mutability|MUTABLE|url|http://man7.org/linux/man-pages/man3/realpath.3.html^0|H|8|0|0|0|0|0|3|4|0|0|19|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|D|3|E|5|F|7|14|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|15|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|16|8|@]|9|@]|C|$G|H]]|$1|M|3|N|5|6|7|17|8|@$A|18|B|19|O|P]]|9|@]|C|$]]|$1|Q|3|R|5|6|7|1A|8|@$A|1B|B|1C|O|P]]|9|@]|C|$]]|$1|S|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]]]

Since there is a <a href="http://man7.org/linux/man-pages/man3/realpath.3.html" rel="noreferrer" title="realpath">realpath</a> as others have pointed out:


<pre><code>// realpath.c
#include &lt;stdio.h&gt;
#include &lt;stdlib.h&gt;

int main (int argc, char* argv[])
{
 if (argc &gt; 1) {
 for (int argIter = 1; argIter &lt; argc; ++argIter) {
 char *resolved_path_buffer = NULL;
 char *result = realpath(argv[argIter], resolved_path_buffer);

 puts(result);

 if (result != NULL) {
 free(result);
 }
 }
 }

 return 0;
}
</code></pre>

Makefile:


<pre><code>#Makefile
OBJ = realpath.o

%.o: %.c
 $(CC) -c -o $@ $&lt; $(CFLAGS)

realpath: $(OBJ)
 gcc -o $@ $^ $(CFLAGS)
</code></pre>

Then compile with <code>make</code> and put in a soft link with: 
<code>ln -s $(pwd)/realpath /usr/local/bin/realpath</code>

blocks|key|1159988|text|使用Python获取它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1159989|#!/usr/bin/env+python
import+os
import+sys

print(os.path.realpath(sys.argv[1]))|code-block|syntax|javascript|1159990|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use Python to get it:

<pre><code>#!/usr/bin/env python
import os
import sys

print(os.path.realpath(sys.argv[1]))
</code></pre>

blocks|key|946444|text|abs_path+()+{++++
+++echo+"$(cd+$(dirname+"$1");pwd)/$(basename+"$1")"
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|946445|dirname将给出/path/to/file的目录名，即/path/to。|unstyled|offset|length|style|CODE|946446|cd+/path/to;+pwd确保路径是绝对路径。|946447|basename将只给出/path/to/file中的文件名，即file。|946448|entityMap^0|0|0|7|A|D|T|8|0|0|G|0|0|8|C|D|W|4|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|R|8|@$G|S|H|T|I|J]|$G|U|H|V|I|J]|$G|W|H|X|I|J]]|9|@]|A|$]]|$1|K|3|L|5|F|7|Y|8|@$G|Z|H|10|I|J]]|9|@]|A|$]]|$1|M|3|N|5|F|7|11|8|@$G|12|H|13|I|J]|$G|14|H|15|I|J]|$G|16|H|17|I|J]]|9|@]|A|$]]|$1|O|3|-4|5|F|7|18|8|@]|9|@]|A|$]]]|P|$]]

<pre><code>abs_path () { 
 echo "$(cd $(dirname "$1");pwd)/$(basename "$1")"
}
</code></pre>

<code>dirname</code> will give the directory name of <code>/path/to/file</code>, i.e. <code>/path/to</code>.

<code>cd /path/to; pwd</code> ensures that the path is absolute.

<code>basename</code> will give just the filename in <code>/path/to/file</code>, i.e.<code>file</code>.

blocks|key|1160189|text|针对Mac+OS+X的realpath|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1160190|realpath()+{
++++path=`eval+echo+"$1"`
++++folder=$(dirname+"$path")
++++echo+$(cd+"$folder";+pwd)/$(basename+"$path");+
}|code-block|syntax|javascript|1160191|具有相关路径的示例：|1160192|realpath+"../scripts/test.sh"|1160193|主文件夹示例|1160194|realpath+"~/Test/../Test/scripts/test.sh"|1160195|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

realpath for Mac OS X

<pre><code>realpath() {
 path=`eval echo "$1"`
 folder=$(dirname "$path")
 echo $(cd "$folder"; pwd)/$(basename "$path"); 
}
</code></pre>

Example with related path:

<pre><code>realpath "../scripts/test.sh"
</code></pre>

Example with home folder

<pre><code>realpath "~/Test/../Test/scripts/test.sh"
</code></pre>

blocks|key|1160429|text|我检查了每个答案，但错过了Jason+S+Jul+14+'16在3:12的最佳答案(IMHO)，离开了评论区。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1160430|所以这里是，如果像我这样的人倾向于检查答案，而没有时间查看每一条评论：|1160431|$(+cd+"$(dirname+"$0")"+;+pwd+-P+)|code-block|syntax|javascript|1160432|帮助：|1160433|NAME
+++++pwd+--+return+working+directory+name

SYNOPSIS
+++++pwd+[-L+%7C+-P]

DESCRIPTION
+++++The+pwd+utility+writes+the+absolute+pathname+of+the+current+working
+++++directory+to+the+standard+output.

+++++Some+shells+may+provide+a+builtin+pwd+command+which+is+similar+or+identi-
+++++cal+to+this+utility.++Consult+the+builtin(1)+manual+page.

+++++The+options+are+as+follows:

+++++-L++++++Display+the+logical+current+working+directory.

+++++-P++++++Display+the+physical+current+working+directory+(all+symbolic
+++++++++++++links+resolved).|1160434|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I checked every answered, but missed the best one (IMHO) by Jason S Jul 14 '16 at 3:12, left the comment field.
So here it is, in case someone like me having the tendency to check answered and don't have time to go through every single comments:
<pre><code>$( cd &quot;$(dirname &quot;$0&quot;)&quot; ; pwd -P )
</code></pre>
Help:
<pre><code>NAME
 pwd -- return working directory name

SYNOPSIS
 pwd [-L | -P]

DESCRIPTION
 The pwd utility writes the absolute pathname of the current working
 directory to the standard output.

 Some shells may provide a builtin pwd command which is similar or identi-
 cal to this utility. Consult the builtin(1) manual page.

 The options are as follows:

 -L Display the logical current working directory.

 -P Display the physical current working directory (all symbolic
 links resolved).
</code></pre>

blocks|key|946299|text|这似乎适用于OSX，不需要任何二进制文件，并且被拉入from+here|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|946300|function+normpath()+{
++#+Remove+all+/./+sequences.
++local+path=${1//\/.\//\/}

++#+Remove+dir/..+sequences.
++while+[[+$path+=~+([%5E/][%5E/]*/\.\./)+]];+do
++++path=${path/${BASH_REMATCH[0]}/}
++done
++echo+$path
}|code-block|syntax|javascript|946301|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/29256624/26510^0|Q|9|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

This seems to work for OSX, doesnt require any binaries, and was pulled <a href="https://stackoverflow.com/a/29256624/26510">from here</a>

<pre><code>function normpath() {
 # Remove all /./ sequences.
 local path=${1//\/.\//\/}

 # Remove dir/.. sequences.
 while [[ $path =~ ([^/][^/]*/\.\./) ]]; do
 path=${path/${BASH_REMATCH[0]}/}
 done
 echo $path
}
</code></pre>

blocks|key|946381|text|我喜欢这样：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|946382|#!/usr/bin/env+bash
function+realpath()+{
++++local+_X="$PWD"
++++local+_LNK=$1
++++cd+"$(dirname+"$_LNK")"
++++if+[+-h+"$_LNK"+];+then
++++++++_LNK="$(readlink+"$_LNK")"
++++++++cd+"$(dirname+"$_LNK")"
++++fi
++++echo+"$PWD/$(basename+"$_LNK")"
++++cd+"$_X"
}|code-block|syntax|javascript|946383|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I like this:

<pre class="lang-sh prettyprint-override"><code>#!/usr/bin/env bash
function realpath() {
 local _X="$PWD"
 local _LNK=$1
 cd "$(dirname "$_LNK")"
 if [ -h "$_LNK" ]; then
 _LNK="$(readlink "$_LNK")"
 cd "$(dirname "$_LNK")"
 fi
 echo "$PWD/$(basename "$_LNK")"
 cd "$_X"
}
</code></pre>

I am trying to obtain the absolute path to the currently running script on OS&nbsp;X.

I saw many replies going for <code>readlink -f $0</code>. However since OS X's <code>readlink</code> is the same as BSD's, it just doesn't work (it works with GNU's version).

Is there an out-of-the-box solution to this?

Bash script absolute path with OS X

我正在尝试获取OS X上当前正在运行的脚本的绝对路径。我看到很多回复都是关于readlink -f $0的。然而，由于OS的readlink和BSD是一样的，它就是不能工作(它可以与GNU的版本一起工作)。有没有开箱即用的解决方案？

问OS X的Bash脚本绝对路径
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回答 10

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