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Full Discussion: System Calls using C w/BASH
Top Forums Programming System Calls using C w/BASH Post 302611715 by Corona688 on Friday 23rd of March 2012 10:54:24 AM
Old 03-23-2012
Your buffer only has five bytes of space.

Writing beyond that is rampaging through stack space, overwriting every local variable behind it until it finds and corrupts your stack frame itself, crashing your program the next time it tries to do anything to the stack.

Code:
#include <stdio.h>
#include <string.h>

int main(int argc, char *argv[])
{
    
    int i;
    char theCommand[16384] = "cat ";
  
    for (i = 1; i < argc; i++)
    {
        strcat(theCommand, argv[i]);
    }
    strcat(theCommand, " >> testfile.txt");
    system(theCommand);

    return 0;
}

This User Gave Thanks to Corona688 For This Post:
whyte_rhyno
 

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LEARN ABOUT DEBIAN

ecaccess-file-move

ECACCESS-FILE-MOVE(1p)					User Contributed Perl Documentation				    ECACCESS-FILE-MOVE(1p)

NAME

       ecaccess-file-move - Move or Rename ECaccess Files

SYNOPSIS

       ecaccess-file-move -version|-help|-manual

       ecaccess-file-move [-debug] source-ecaccess-file target-ecaccess-file

DESCRIPTION

       Allow moving an ECaccess File. When the move occurs within the same ECaccess File System then it is a rename. When the move occurs across
       two different ECaccess File Systems then first a copy is done and then a delete of the original file is done (e.g. similar to ecaccess-
       file-copy ... -erase).

       The source-ecaccess-file and target-ecaccess-file are in the form [domain:][/user-id/]path. Please read the "Shell commands -> File
       Management" section of the "ecaccess" guide for more information on the ECaccess File System.

ARGUMENTS

       source-ecaccess-file
	       The source ECaccess File name.

       target-ecaccess-file
	       The target ECaccess File name.

OPTIONS

       -version
	       Display version number and exits.

       -help   Print a brief help message and exits.

       -manual Prints the manual page and exits.

       -debug  Display the SOAP messages exchanged.

EXAMPLES

       ecaccess-file-move ec:test1.txt ec:test2.txt

       Rename the test1.txt file in the ECFS directory of the authenticated user in test2.txt.

       ecaccess-file-move ec:test1.txt home:test2.txt

       Copy the test1.txt file from the ECFS directory of the authenticated user to the test2.txt file in the $HOME directory of the authenticated
       user, then delete the test1.txt file from ECFS.

SEE ALSO

       ecaccess-file-delete, ecaccess-file-get, ecaccess-file-mget, ecaccess-file-modtime, ecaccess-file-mput, ecaccess-file-rmdir, ecaccess-file-
       copy, ecaccess-file-dir, ecaccess-file-mdelete, ecaccess-file-mkdir, ecaccess-file-chmod, ecaccess-file-put, ecaccess-file-size and
       ecaccess.

perl v5.14.2							    2012-04-16						    ECACCESS-FILE-MOVE(1p)
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