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Full Discussion: [ C ] multidemensional array pass to functions
Top Forums Programming [ C ] multidemensional array pass to functions Post 302265184 by VRoemer on Friday 5th of December 2008 09:37:49 PM
Old 12-05-2008
[ C ] multidemensional array pass to functions
Please excuse my ineptitude for a bit as I've been spoiled for the past few months with only writing perl code instead of C.

So ok, I've been thinking about some code to change the crc32 values that are held within central directory headers of zip files.

Because I'm lazy I decided to just hack up some archive repair tool to write the desired crc32.

What I figured I could do was make a multidimensional array of ints to pass to the function that will do all the messy work.


Here is the relevant code:

Code:
int crcSpoof( char* file, char* fileOut, char* fileOutTmp, ulong* nRecovered, ulong* bytesRecovered, int** CRC_Array )

...

int main( int argc, char** argv )
{
    int i = 3; // start with the 3rd value of argv
    int** crc_s; 
    
    // Some argument testing here

    while( argv[ i ] )
       crc_s = argv[ i ];
    
    crcSpoof( argv[1], argv[2], "fileOutTmp", NULL, NULL, crc_s );

I feel that this is probably ok but I really can't test it until I baseline some units around here.


Thanks!
 

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LEARN ABOUT CENTOS

error::pass4

ERROR::PASS4(7stap)													       ERROR::PASS4(7stap)

NAME

       error::pass4 - systemtap pass-4 errors

DESCRIPTION

       Errors that occur during pass 4 (compilation) have generally only a few causes:

       kernel or OS version changes
	      The systemtap runtime and embedded-C fragments in the tapset library are designed to be portable across a wide range of OS versions.
	      However, incompatibilities can occur when some OS changes occur, such as kernel  modifications  that  change  functions,	types,	or
	      macros referenced by systemtap.  Upstream builds of systemtap are often quickly updated to include relevant fixes, so try getting or
	      making an updated build.	If the issue persists, report the problem to the systemtap developers.

       buggy embedded-C code
	      Embedded-C code in your own guru-mode script cannot be checked by systemtap, and is passed through verbatim to the compiler.  Errors
	      in such snippets of code may be found during the pass-4 compiler invocation, though may be hard to identify by the compiler errors.

       incompatible embedded-C code
	      The  interface standards between systemtap-generated code and embedded-C code occasionally change.  For example, before version 1.8,
	      arguments were passed using macros THIS->foo and THIS->__retvalue but from version 1.8 onward, using STAP_ARG_foo and STAP_RETVALUE.
	      Adjust your embedded-C code to current standards, or use the stap --compatible=VERSION option to make systemtap use a different one.

GATHERING MORE INFORMATION

       It  may	be  necessary  to run systemtap with -k or -p3 to examine the generated C code.  Increasing the verbosity of pass-4 with an option
       such as --vp 0001 can also help pinpoint the problem.

SEE ALSO

       stap(1),
       error::reporting(7stap)

															       ERROR::PASS4(7stap)
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