linux克隆后重新封装,克隆后立即在OSX上修改Linux内核源代码

当我在OS X上克隆

Linux源代码时,它们会立即被更改,并且git reset –hard不会将内容恢复.这是一个完整的会议：

$git clone git://github.com/torvalds/linux.git

$cd linux

$git status

On branch master

Your branch is up-to-date with 'origin/master'.

Changes not staged for commit:

(use "git add ..." to update what will be committed)

(use "git checkout -- ..." to discard changes in working directory)

modified: include/uapi/linux/netfilter/xt_CONNMARK.h

modified: include/uapi/linux/netfilter/xt_DSCP.h

modified: include/uapi/linux/netfilter/xt_MARK.h

modified: include/uapi/linux/netfilter/xt_RATEEST.h

modified: include/uapi/linux/netfilter/xt_TCPMSS.h

modified: include/uapi/linux/netfilter_ipv4/ipt_ECN.h

modified: include/uapi/linux/netfilter_ipv4/ipt_TTL.h

modified: include/uapi/linux/netfilter_ipv6/ip6t_HL.h

modified: net/netfilter/xt_DSCP.c

modified: net/netfilter/xt_HL.c

modified: net/netfilter/xt_RATEEST.c

modified: net/netfilter/xt_TCPMSS.c

no changes added to commit (use "git add" and/or "git commit -a")

我们可以看到,克隆后文件立即发生了变化.甚至不是他们的元数据,而是内容：

git diff include/uapi/linux/netfilter_ipv6/ip6t_HL.h

index ebd8ead..6e76dbc 100644

--- a/include/uapi/linux/netfilter_ipv6/ip6t_HL.h

+++ b/include/uapi/linux/netfilter_ipv6/ip6t_HL.h

@@ -1,6 +1,6 @@

-/* Hop Limit modification module for ip6tables

+/* ip6tables module for matching the Hop Limit value

* Maciej Soltysiak

- * Based on HW's TTL module */

+ * Based on HW's ttl module */

#ifndef _IP6T_HL_H

#define _IP6T_HL_H

@@ -8,14 +8,14 @@

#include

enum {

- IP6T_HL_SET = 0,- IP6T_HL_INC,- IP6T_HL_DEC

+ IP6T_HL_EQ = 0,/* equals */

+ IP6T_HL_NE,/* not equals */

+ IP6T_HL_LT,/* less than */

+ IP6T_HL_GT,/* greater than */

};

-#define IP6T_HL_MAXMODE IP6T_HL_DEC

-struct ip6t_HL_info {

+struct ip6t_hl_info {

__u8 mode;

__u8 hop_limit;

};

系统信息：

>文件系统：Journaled HFS

>操作系统：OS X 10.11.5(15F34)

> git版本：2.9.0

>〜/ .gitconfig只有[user]条目.

到底是怎么回事？为什么在克隆后立即修改文件？