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Old 03-13-2009, 04:55 AM   #1
Registered: Oct 2003
Location: Chennai
Distribution: Slackware 12.1
Posts: 165

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Can a "Bourne shell script text executable" installer be modified manually ?

I have a file..say filename.bin, which is an installer

$> file filename.bin
filename.bin: Bourne shell script text executable
However when I execute this binary:

$> ./filename.bin
-bash: ./filename.bin: /bin/sh^M: bad interpreter: No such file or directory

Now my question is can I safely try changing the first line of the binary which is #!/bin/sh ? Would it affect the way the binary is run ?

NOTE: /bin/sh exists and is a link to bash. Also when I open filename.bin using vim I do not see any special characters at the end of interpreter line. (I used :se list)

Thanks in advance.
Old 03-13-2009, 06:04 AM   #2
Registered: Mar 2009
Distribution: Debian,Centos
Posts: 30

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Seems to me that this file was originally created on a windows machine.

The easiest way to fix this is to install a package called tofrodos which includes a command called dos2unix among others.

All you will need to do is run:
dos2unix filename
Good luck.
Old 03-13-2009, 06:09 AM   #3
Senior Member
Registered: Dec 2007
Location: Croatia
Distribution: Debian GNU/Linux
Posts: 1,733
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Have you tried:
* []dos2unix <infile> <outfile>
Maybe you'll need to install sysutils for that to work.
* []cat <infile> | tr -d ``\r'' > <outfile>
This is from Snort docs.

Last edited by alan_ri; 03-13-2009 at 06:17 AM.


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