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

Libu · 03-13-2009, 04:55 AM

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

Code:

$> file filename.bin
filename.bin: Bourne shell script text executable

However when I execute this binary:

Code:

$> ./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.

hedgy102 · 03-13-2009, 06:04 AM

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:

Code:

dos2unix filename

Good luck.

alan_ri · 03-13-2009, 06:09 AM

Have you tried:

Code:

* []dos2unix <infile> <outfile>

Maybe you'll need to install sysutils for that to work.
Or:

Code:

* []cat <infile> | tr -d ``\r'' > <outfile>

This is from Snort docs.