Compilation error stray 302 in program etc

Question

I am having problem compiling the followed exploit code   http   downloads securityfocus com vulnerabilities exploits 59846-1 c  I am using   gcc file c  and  gcc -O2 file c  but both of them gets the following errors    sorbolinux-exec c  In function    sc      sorbolinux-exec c 76  error  stray     302    in program  sorbolinux-exec c 76  error  stray     244    in program  sorbolinux-exec c 76  error     t    undeclared  first use in this function   sorbolinux-exec c 76  error   Each undeclared identifier is reported only  once  sorbolinux-exec c 76  error  for each function it appears in     I tried compiling them on both Kali linux and Ubuntu 10 04 and get the same result

User · Answer

I got the same with a character that visibly appeared as an asterisk, but was a UTF-8 sequence instead.

Encoder * st;

When compiled returned:

g.c:2:1: error: stray ‘\342’ in program
g.c:2:1: error: stray ‘\210’ in program
g.c:2:1: error: stray ‘\227’ in program

342 210 227 turns out to be UTF-8 for ASTERISK OPERATOR.

Deleting the '*' and typing it again fixed the problem.

User · Answer

It s perhaps because you copied code from net   from a site which has perhaps not an ASCII encoded page  but UTF-8 encoded page   so you can convert the code to ASCII from this site     http   www percederberg net tools text converter html   There you can either detect errors manually by converting it back to UTF-8  or you can automatically convert it to ASCII and remove all the stray characters

User · Answer

Codo was exactly right on Oct  5 that  amp current i  is the intended text  with the currency symbol inadvertently introduced when the source was put into HTML  see original     http   downloads securityfocus com vulnerabilities exploits 59846-1 c  Codo s change makes this exploit code compile without error  I did that and was able to use the exploit on Ubuntu 12 04 to escalate to root privilege

User · Answer

Whenever compiler found special character    it gives these king of compile error      what error i found is as following   error  stray   302  in program and error  stray   240  in program        Some piece of code i copied from chatting messanger  In messanger it was special character only   after copiying into vim editor it changed to correct character only  But compiler was giving above error    then    that stamenet i wrote mannualy after    it got resolve

User · Answer

You have invalid chars in your source  If you don t have any valid non ascii chars in your source  maybe in a double quoted string literal  you can simply convert your file back to ascii with   tr -cd   11 12 15 40- 176   lt  old c  gt  new c   Edit  method with iconv will stop at wrong chars which makes no sense  The above command line is working with the example file  Good luck  -

User · Answer

Sure  convert the file to ascii and blast all unicode characters away  It will probably work     BUT      You won t know what you fixed   It will also destroy any unicode comments  Ex      A   B   C   It could potentially damage obvious logic  the code will still be broken  but the solution less obvious  For example  A string with  Smart-Quotes        amp       or a pointer with a full-width astrix        Now    SOME THING    looks like a  define   SOME THING   and  SomeType is the wrong type   SomeType        Two more sugrical approaches to fixing the problem    Switch fonts to see the character   It might be invisible in your current font  Regex search all unicode characters not part non-extended ascii  In notepad   I can search up to FFFF  which hasn t failed me yet     x 80 - x FFFF    80 is hex for 128  the first extended ascii character   After hitting  find next  and highlighting what appears to be empty space  you can close your search dialog and press CTRL C to copy to clipboard   Then paste the character into a unicode search tool  I usually use an online one  http   unicode scarfboy com    Example  I had a bullet point       in my code somehow   The unicode value is 2022  hex   but when read as ascii by the compiler you get  342  200  242  3 octal values   It s not as simple as converting each octal values to hex and smashing them together  So  E2 80 A2  is NOT the hex unicode point in your code

User · Answer

You have an invalid character on that line  This is what I saw

User · Answer

With me this error ocurred when I copied and pasted a code in text format to my editor  gedit   The code was in a text document   odt  and I copied it and pasted it into gedit  If you did the same  you have manually rewrite the code

User · Answer

Invalid character on your code  A common copy paste error specially when code is copied from Word Documents or PDF files

User · Answer

The explanations given here are correct  I just wanted to add that this problem might be because you copied the code from somewhere  from a website or a pdf file due to which there are some invalid characters in the code   Try to find those invalid characters  or just retype the code if you can t  It will definitely compile then   Source  stray error reason

User · Answer

Change the name of the file c to some other file423 c  it may be because of the name conflict between c files

User · Answer

I noticed an issue in using the above tr command  The tr command COMPLETELY removes the  smart quotes   It would be better to replace the  smart quotes  with something like this    This will give you a quick preview of what will be replaced    sed s              g File txt  This will do the replacements and put the replacement in a new file called WithoutSmartQuotes txt    sed s              g File txt  gt  WithoutSmartQuotes txt  This will overwrite the original file    sed -i   bk  s              g File txt  http   developmentality wordpress com 2010 10 11 how-to-remove-smart-quotes-from-a-text-file

User · Answer

This problem comes when you have copied some text from html or you have done modification in windows environment and trying to compile in Unix Solaris environment   Please do  dos2unix  to remove the special characters from the file   dos2unix fileName ext fileName ext

[c] Compilation error: stray ‘\302’ in program etc

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