/*

 * This program displays the names of all files in the current directory.

 */



#include <dirent.h> 

#include <stdio.h>

#include <string.h> 



int Search_in_File(char *fname);



int main(void)

{

 DIR *d;

 struct dirent *dir;

 d = opendir(".");

 if(d)

 {

 while ((dir = readdir(d)) != NULL)

 {

 if(strlen(dir->d_name)>4)

 {

 printf("Scanning:%s\n", dir->d_name);

 Search_in_File(dir->d_name);

 printf("------------------\n");

 }

 }

 closedir(d);

 }

 return(0);

}



/*this function from [url]http://www.codingunit.com/c-tutorial-searching-for-strings-in-a-text-file[/url]

 and edited by Taufik Fahrudin*/

int Search_in_File(char *fname) {

 FILE *fp;

 int line_num = 1;

 int find_result = 0;

 char temp[512];

 char str[]="[removed]<!--";

 int seekstart=0;

 int seekend=0;

 

 if((fp = fopen(fname, "r+")== NULL) {

 return(-1);

 }



 while(fgets(temp, 512, fp) != NULL) {

 if((strstr(temp, str)) != NULL) {

 printf("A match found on line: %d\n", line_num);

 seekstart=ftell(fp);

 fseek(fp,0,SEEK_END);

 seekend=ftell(fp);

 printf("\n%s and from %d to %d\n", temp,seekstart,seekend);

 find_result++;

 fseek(fp,seekstart,SEEK_SET);

 printf("Resetting seek to %d\n",ftell(fp));

 //part edited from [url]http://www.thegeekstuff.com/2012/07/c-file-handling/[/url]

 memset(temp, 0, sizeof(temp));

 if(1*5 != fwrite(temp,1,seekend-seekstart,fp))

 {

 printf("\n fwrite() failed\n");

 return 1;

 }

 

 printf("====");

 break;

 }

 line_num++;

 }



 if(find_result == 0) {

 printf("\nFile looks clean.\n");

 }

 

 //Close the file if still open.

 if(fp) {

 fclose(fp);

 }

 return(0);

}