Linux命令学习总结：dos2unix

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今天第一次接触这个，做个记录，最近觉得linux的东西知道的太少了，不行，得好好看点资料了。

命令简介：

dos2unix是将Windows格式文件转换为Unix、Linux格式的实用命令。Windows格式文件的换行符为\r\n ,而Unix&Linux文件的换行符为\n. dos2unix命令其实就是将文件中的\r\n 转换为\n。

而unix2dos则是和dos2unix互为孪生的一个命令，它是将Linux&Unix格式文件转换为Windows格式文件的命令。

命令语法：

dos2unix [options] [-c convmode] [-o file ...] [-n infile outfile ...]

unix2dos [options] [-c convmode] [-o file ...] [-n infile outfile ...]

命令参数：

此命令参数是Red Hat Enterprise Linux Server release 5.7下dos2unix命令参数，不同版本Linux的dos2nnix命令参数有可能不同。

参数

长参数

描叙

-h

显示命令dos2unix联机帮助信息。

-k

保持文件时间戳不变

-q

静默模式，不输出转换结果信息等

-V

显示命令版本信息

-c

转换模式

-o

在源文件转换，默认参数

-n

保留原本的旧档，将转换后的内容输出到新档案.默认都会直接在原来的文件上修改，

使用示例：

1: 查看dos2unix命令的帮助信息

[root@DB-Server myscript]# man dos2unix

[root@DB-Server myscript]# dos2unix -h

dos2unix Copyright (c) 1994-1995 Benjamin Lin

         Copyright (c) 1998      Bernd Johannes Wuebben (Version 3.0)

         Copyright (c) 1998      Christian Wurll (Version 3.1)

Usage: dos2unix [-hkqV] [-c convmode] [-o file ...] [-n infile outfile ...]

 -h --help        give this help

 -k --keepdate    keep output file date

 -q --quiet       quiet mode, suppress all warnings

                  always on in stdin->stdout mode

 -V --version     display version number

 -c --convmode    conversion mode

 convmode         ASCII, 7bit, ISO, Mac, default to ASCII

 -l --newline     add additional newline in all but Mac convmode

 -o --oldfile     write to old file

 file ...         files to convert in old file mode

 -n --newfile     write to new file

 infile           original file in new file mode

 outfile          output file in new file mode

2: dos2unix filename 将Windows格式文本转换为Unix&Linux格式文件

   1: [root@DB-Server myscript]# cat -v test.sh

   2: . /home/oracle/.bash_profile^M

   3: echo ' '^M

   4: date^M

   5: echo ' '^M

   6: ^M

   7: sqlplus test/test @/home/oracle/scripts/test.sql^M

   8: ^M

   9: echo ' '^M

  10: date^M

  11: echo ' '^M

  12: [root@DB-Server myscript]# dos2unix test.sh

  13: dos2unix: converting file test.sh to UNIX format ...

  14: [root@DB-Server myscript]# cat -v test.sh

  15: . /home/oracle/.bash_profile

  16: echo ' '

  17: date

  18: echo ' '

19:

  20: sqlplus test/test @/home/oracle/scripts/test.sql

21:

  22: echo ' '

  23: date

  24: echo ' '

3： dos2unix 可以一次转换多个文件

   1: dos2unix filename1 filename2 filename3

4: 默认情况下会在源文件上进行转换，如果需要保留源文件，那么可以使用参数-n dos2unix -n oldfilename newfilename

   1: [root@DB-Server myscript]# dos2unix -n dosfile linuxfile

   2: dos2unix: converting file dosfile to file linuxfile in UNIX format ...

   3: [root@DB-Server myscript]# cat -v dosfile

   4: it is a windows dos file^M

   5: you should convert to unix&linux format^M

   6: [root@DB-Server myscript]# cat -v linuxfile

   7: it is a windows dos file

   8: you should convert to unix&linux format

   9: [root@DB-Server myscript]#

clip_image001

5:保持文件时间戳不变

   1: [root@DB-Server myscript]# ls -lrt dosfile

   2: -rw-r--r-- 1 root root 67 Dec 26 11:46 dosfile

   3: [root@DB-Server myscript]# dos2unix dosfile

   4: dos2unix: converting file dosfile to UNIX format ...

   5: [root@DB-Server myscript]# ls -lrt dosfile

   6: -rw-r--r-- 1 root root 65 Dec 26 11:58 dosfile

   7: [root@DB-Server myscript]# dos2unix -k dosfile

   8: dos2unix: converting file dosfile to UNIX format ...

   9: [root@DB-Server myscript]# ls -lrt dosfile

  10: -rw-r--r-- 1 root root 65 Dec 26 11:58 dosfile

6：静默模式格式化文件

   1: [root@DB-Server myscript]# unix2dos -q dosfile

2:

   3: [root@DB-Server myscript]#

dos2unix的下载地址为http://sourceforge.net/projects/dos2unix/ ,可以从上面下载最新版本的dos2unix、unix2dos等命令工具以及相关文档，dos2unix的源码如下所示

   1: /*

2:

   3: *  Name: dos2unix

4:

   5: *  Documentation:

6:

   7: *    Remove cr ('\x0d') characters from a file.

8:

   9: *

10:

  11: *  The dos2unix package is distributed under FreeBSD style license.

12:

  13: *  See also http://www.freebsd.org/copyright/freebsd-license.html

14:

  15: *  --------

16:

  17: *

18:

  19: *  Copyright (C) 2009-2015 Erwin Waterlander

20:

  21: *  Copyright (C) 1998 Christian Wurll

22:

  23: *  Copyright (C) 1998 Bernd Johannes Wuebben

24:

  25: *  Copyright (C) 1994-1995 Benjamin Lin.

26:

  27: *  All rights reserved.

28:

  29: *

30:

  31: *  Redistribution and use in source and binary forms, with or without

32:

  33: *  modification, are permitted provided that the following conditions

34:

  35: *  are met:

36:

  37: *  1. Redistributions of source code must retain the above copyright

38:

  39: *     notice, this list of conditions and the following disclaimer.

40:

  41: *  2. Redistributions in binary form must reproduce the above copyright

42:

  43: *     notice in the documentation and/or other materials provided with

44:

  45: *     the distribution.

46:

  47: *

48:

  49: *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY

50:

  51: *  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

52:

  53: *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

54:

  55: *  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE

56:

  57: *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

58:

  59: *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT

60:

  61: *  OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR

62:

  63: *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

64:

  65: *  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE

66:

  67: *  OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN

68:

  69: *  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

70:

  71: *

72:

  73: *  == 1.0 == 1989.10.04 == John Birchfield (jb@koko.csustan.edu)

74:

  75: *  == 1.1 == 1994.12.20 == Benjamin Lin (blin@socs.uts.edu.au)

76:

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