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Tuesday, August 12, 2014
/*C program to create a file with 16 bytes of arbitrary data from the beginning and another 16 bytes of arbitrary data from an offset of 48.Display the following file contents to demonstrate how the hole in a file is handled with using Command Line Arguments*/
#include<stdio.h>
#include<fcntl.h>
#include"string.h"
int main(int argc,char *argv[])
{
int n=creat(argv[1],"w");
char ch[16]="hello world how are";
char str[20]="od -c ";
char mode[20]="chmod 777 ";
write(n,ch,16);
lseek(n,48,SEEK_SET);
write(n,ch,16);
strcat(mode,argv[1]);
system(mode);
strcat(str,argv[1]);
system(str);
return(0);
}
--------------------------------
screenshot:
#include<stdio.h>
#include<fcntl.h>
#include"string.h"
int main(int argc,char *argv[])
{
int n=creat(argv[1],"w");
char ch[16]="hello world how are";
char str[20]="od -c ";
char mode[20]="chmod 777 ";
write(n,ch,16);
lseek(n,48,SEEK_SET);
write(n,ch,16);
strcat(mode,argv[1]);
system(mode);
strcat(str,argv[1]);
system(str);
return(0);
}
--------------------------------
screenshot:
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