Is there a convenient method for converting DOS and UNIX file formats? - China DOS Union Forum

Actually, I only need the one from UNIX to DOS, that is, '\n' -> '\r\n'

With the help of sed, the following way can achieve the effect:

sed -e "s/$/\r/" myunix.txt > mydos.txt

However, now I want to ask if there is a simpler method, preferably without using third-party tools.

I already know the principle. The following is excerpted from: http://hi.baidu.com/dbsuit/blog/item/511eb409f9abe7266b60fba8.html


Conversion between Windows/DOS and Unix file formats
2007-06-21 13:25

Windows/DOS and Unix file formats are different

First, clarify a few symbols
*******************
0A   LF   ^J   Newline
0D   CR   ^M   Carriage return
*******************

In DOS/Windows text files, CR (carriage return \r) and LF (newline \n) are used.
In the case of the end of a line in the file, it is '\r\n'

Unix text only uses the newline character, with a newline (\n) at the end of the line, that is, '\n'
So C programs edited under Windows and compiled under Unix will have a "No end of newline" Warning

Conversion between the two file formats
Unix -> Dos
'\n' -> '\r\n'

//////////////////////////////////////////
       
        while ( (ch = fgetc(in)) != EOF )
        {
            if ( ch == '\n' )
                putchar('\r');
            putchar(ch);
        }
      
//////////////////////////////////////////

Just add a '\r' character before the '\n' that appears in the Unix file

Unix <- DOS 
'\n' <- '\r\n'

The situation from Dos to Unix is more complicated. You can't just remove the '\r' read from the file.
Because there may be an embedded carriage return symbol at the end of the text line in the Dos file, this situation occurs in impact printers.
So before conversion, you need to judge whether '\r' and '\n' appear simultaneously.
If they appear simultaneously, remove '\r'
If they do not appear simultaneously, keep '\n'

//////////////////////////////////////////
      
        cr_flag = 0;    /* No CR encountered yet */
        while ( (ch = fgetc(in)) != EOF )
        {
            if ( cr_flag && ch != '\n' ) {
                /* This CR did not preceed LF */
                putchar('\r');
            }
            if ( !(cr_flag = (ch == '\r')) )
                putchar(ch);
        }

//////////////////////////////////////////

[ Last edited by honghunter on 2008-1-10 at 02:15 PM ]

Unix -> Dos

for /f "delims=" %i in (Unix.txt) do echo %i>>dos.txt
That's it

Originally posted by Must Love at 2008-1-10 03:53 PM:
Unix -> Dos

type Unix.txt>dos.txt
That's it

I did this, but it's still in UNIX format,郁闷.

The source file only had line breaks, and the new file became "ECHO is on."

That shouldn't be the case. Why don't I have that problem?

将more myunix.txt>mydos.txt按照要求直接输出即可，因为这本身是英文相关操作命令，无需翻译，所以输出：more myunix.txt>mydos.txt

Thank you all. I'll try it again when I get to the company tomorrow.

Originally posted by lxmxn at 2008-1-10 17:00:
more myunix.txt>mydos.txt

Solved a problem that had troubled me for a long time. Thanks to the moderator.

It's amazing. I didn't know more had this function.

[ Last edited by weasel on 2009-6-2 at 06:47 ]

Originally posted by weasel at 2009-6-1 13:08:

Solved a problem that had been bothering me for a long time. Thanks to the moderator.

It's amazing, I didn't know more had this function.

[ Last edited by weasel on 2009-6-2 at 06:47 ]

Similarly, if in a Unix system, using more dosfile>unixfile can also convert Windows format text to Unix format text.

Which version of Unix did you test in?

Originally posted by HAT at 2010-7-20 13:24:
Which version of Unix did you test in?

It's not testing but using. It's the SCO Unix 5.0.5 version

You're really lucky, all my tests in the following systems failed:
Ubuntu, Solaris, AIX, FreeBSD

Floor1　honghunter	Posted 2008-01-10 14:13
中级用户　Posts 135　Credits 321
Actually, I only need the one from UNIX to DOS, that is, '\n' -> '\r\n' With the help of sed, the following way can achieve the effect: sed -e "s/$/\r/" myunix.txt > mydos.txt However, now I want to ask if there is a simpler method, preferably without using third-party tools. I already know the principle. The following is excerpted from: http://hi.baidu.com/dbsuit/blog/item/511eb409f9abe7266b60fba8.html Conversion between Windows/DOS and Unix file formats 2007-06-21 13:25 Windows/DOS and Unix file formats are different First, clarify a few symbols ***************** 0A LF ^J Newline 0D CR ^M Carriage return ***************** In DOS/Windows text files, CR (carriage return \r) and LF (newline \n) are used. In the case of the end of a line in the file, it is '\r\n' Unix text only uses the newline character, with a newline (\n) at the end of the line, that is, '\n' So C programs edited under Windows and compiled under Unix will have a "No end of newline" Warning Conversion between the two file formats Unix -> Dos '\n' -> '\r\n' ////////////////////////////////////////// while ( (ch = fgetc(in)) != EOF ) { if ( ch == '\n' ) putchar('\r'); putchar(ch); } ////////////////////////////////////////// Just add a '\r' character before the '\n' that appears in the Unix file Unix <- DOS '\n' <- '\r\n' The situation from Dos to Unix is more complicated. You can't just remove the '\r' read from the file. Because there may be an embedded carriage return symbol at the end of the text line in the Dos file, this situation occurs in impact printers. So before conversion, you need to judge whether '\r' and '\n' appear simultaneously. If they appear simultaneously, remove '\r' If they do not appear simultaneously, keep '\n' ////////////////////////////////////////// cr_flag = 0; /* No CR encountered yet / while ( (ch = fgetc(in)) != EOF ) { if ( cr_flag && ch != '\n' ) { / This CR did not preceed LF / putchar('\r'); } if ( !(cr_flag = (ch == '\r')) ) putchar(ch); } ////////////////////////////////////////// [ Last edited by honghunter on 2008-1-10 at 02:15 PM* ]

Floor2　不得不爱	Posted 2008-01-10 15:53
超级版主　Posts 2,044　Credits 5,310　From 四川南充
Unix -> Dos for /f "delims=" %i in (Unix.txt) do echo %i>>dos.txt That's it

Floor3　honghunter	Posted 2008-01-10 16:12
中级用户　Posts 135　Credits 321
Originally posted by Must Love at 2008-1-10 03:53 PM: Unix -> Dos type Unix.txt>dos.txt That's it I did this, but it's still in UNIX format,郁闷.

Floor5　honghunter	Posted 2008-01-10 16:45
中级用户　Posts 135　Credits 321
The source file only had line breaks, and the new file became "ECHO is on."

Floor6　不得不爱	Posted 2008-01-10 16:55
超级版主　Posts 2,044　Credits 5,310　From 四川南充
That shouldn't be the case. Why don't I have that problem?

Floor4　不得不爱	Posted 2008-01-10 16:40
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Floor7　lxmxn	Posted 2008-01-10 17:00
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将more myunix.txt>mydos.txt按照要求直接输出即可，因为这本身是英文相关操作命令，无需翻译，所以输出：more myunix.txt>mydos.txt

Floor8　honghunter	Posted 2008-01-10 20:54
中级用户　Posts 135　Credits 321
Thank you all. I'll try it again when I get to the company tomorrow.

Floor9　weasel	Posted 2009-06-01 13:08
初级用户　Posts 66　Credits 118
Originally posted by lxmxn at 2008-1-10 17:00: more myunix.txt>mydos.txt Solved a problem that had troubled me for a long time. Thanks to the moderator. It's amazing. I didn't know more had this function. [ Last edited by weasel on 2009-6-2 at 06:47 ]

Floor10　qqs09123	Posted 2010-07-19 20:56
新手上路　Posts 8　Credits 8
Originally posted by weasel at 2009-6-1 13:08: Solved a problem that had been bothering me for a long time. Thanks to the moderator. It's amazing, I didn't know more had this function. [ Last edited by weasel on 2009-6-2 at 06:47 ] Similarly, if in a Unix system, using more dosfile>unixfile can also convert Windows format text to Unix format text.

Floor11　HAT	Posted 2010-07-20 13:24
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Which version of Unix did you test in?

Floor12　qqs09123	Posted 2010-07-20 16:05
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Originally posted by HAT at 2010-7-20 13:24: Which version of Unix did you test in? It's not testing but using. It's the SCO Unix 5.0.5 version

Floor13　HAT	Posted 2010-07-21 10:39
版主　Posts 5,017　Credits 9,023
You're really lucky, all my tests in the following systems failed: Ubuntu, Solaris, AIX, FreeBSD