关于cygwin的两个个问题

stesen

1.
cygwin下解压内核后，文件权限后有“+”，查了下是ACL，但是在linux下解压没有“+”，用cygwin创建的其他文件也没有ACL，为什么？

1. $ ls -l
2. total 344
3. -rw-r--r--   1 Administrator None  18693 Jun 10 11:05 COPYING
4. -rw-r--r--   1 Administrator None  93847 Jun 10 11:05 CREDITS
5. drwxr-xr-x+ 83 Administrator None      0 Jun 10 11:05 Documentation
6. -rw-r--r--   1 Administrator None   2430 Jun 10 11:05 Kbuild
7. -rw-r--r--   1 Administrator None 148271 Jun 10 11:05 MAINTAINERS
8. -rw-r--r--   1 Administrator None  55126 Jun 10 11:05 Makefile
9. -rw-r--r--   1 Administrator None  17080 Jun 10 11:05 README
10. -rw-r--r--   1 Administrator None   3172 Jun 10 11:05 REPORTING-BUGS
11. drwxr-xr-x+ 24 Administrator None      0 Jun 10 11:05 arch
12. drwxr-xr-x+  2 Administrator None      0 Jun 10 11:05 block
13. drwxr-xr-x+  3 Administrator None      0 Jun 10 11:05 crypto
14. drwxr-xr-x+ 84 Administrator None      0 Jun 10 11:05 drivers
15. drwxr-xr-x+ 33 Administrator None      0 Jun 10 11:05 firmware
16. drwxr-xr-x+ 70 Administrator None      0 Jun 10 11:05 fs
17. drwxr-xr-x+ 20 Administrator None      0 Jun 10 11:05 include
18. drwxr-xr-x+  2 Administrator None      0 Jun 10 11:05 init
19. drwxr-xr-x+  2 Administrator None      0 Jun 10 11:05 ipc
20. drwxr-xr-x+  6 Administrator None      0 Jun 10 11:05 kernel
21. drwxr-xr-x+  6 Administrator None      0 Jun 10 11:05 lib
22. drwxr-xr-x+  2 Administrator None      0 Jun 10 11:05 mm
23. drwxr-xr-x+ 47 Administrator None      0 Jun 10 11:05 net
24. drwxr-xr-x+  7 Administrator None      0 Jun 10 11:05 samples
25. drwxr-xr-x+ 12 Administrator None      0 Jun 10 11:05 scripts
26. drwxr-xr-x+  7 Administrator None      0 Jun 10 11:05 security
27. drwxr-xr-x+ 21 Administrator None      0 Jun 10 11:05 sound
28. drwxr-xr-x+  2 Administrator None      0 Jun 10 11:05 usr
29. drwxr-xr-x+  3 Administrator None      0 Jun 10 11:05 virt

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2.
在windows下直接用rar或7zip解压linux内核，因为windows对文件大小写不敏感而报错
用cygwin解压不会报错，但是cygwin下的文件同样也存在windows的目录下的啊？
cygwin做了什么处理让windows把“a”文件和“A”文件认为是不同文件呢？

bamanzi

1. 需要设置CYGWIN环境变量，其值包含ntea和ntsec。详情请看/usr/share/doc/cygwin-doc-1.4/html/cygwin-ug-net/using-cygwinenv.html (需要安装cygwin-doc包)

(no)ntea - if set, use NT Extended Attributes to store UNIX-like inode information. This option only operates under Windows NT. Defaults to not set. Only FAT and NTFS support Extended Attributes, not FAT32, so it's of no use there. Furthermore, on NTFS partitions ntsec, which provides real permissions, overrides ntea, which only provides faked permissions. So setting ntea only makes sense if you either have FAT partitions, or if you switch off ntsec explicitely.

(no)ntsec - if set, use the NT security model to set UNIX-like permissions on files and processes. The file permissions can only be set on NTFS partitions. FAT/FAT32 don't support the NT file security. Defaults to set. For more information, read the documentation in the section called “NT security and usage of ntsec”.

2. cygwin完全依赖windows对文件系统进行管理，唯一不同就是模拟了符号链接。所以它也不能区分大小写，你说的问题应该支持tar碰见已有同名(仅有大小写)时并不报告错误信息，直接覆盖了。

stesen

bamanzi：

1.看不太懂。。。。貌似很高深啊。。。

2.确实是忽略了报错信息，我在linux下建了两文件a和A，打包成tar、tar.gz、tar.bz2，拿到windows下解压后只有文件A了，cygwin解压也一样