C ASK : I want to find all postion of substring in file return colum and line of file

it return 1 postion, but i want to it return all postion of substring. Can you help me. thank

Code:

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define BUFFER_SIZE 1000
#define MAX_SIZE 1000
int main()
{
    /* File pointer to hold reference of input file */
    FILE * fPtr;
    FILE * fTemp;
    char path[100];
    char buffer[BUFFER_SIZE];
    char oldWord[100], newWord[100];
    int line, col,i;


    printf("Enter file name: ");
    scanf("%s", path);
    fPtr  = fopen(path, "r");
    fTemp = fopen("replace.tmp", "w");


if (fPtr == NULL || fTemp == NULL)
    {
        /* Unable to open file hence exit */
        printf("\nUnable to open.\n");
        printf("Please check your file.\n");
        exit(EXIT_SUCCESS);
    }
    else
    {
        printf("Input a word: ");
        scanf("%s", newWord);




        indexOf(fPtr, newWord, &line, &col);
        if (line!= -1)


        printf("line: %d, col: %d\n", line+1, col + 1);
      fclose(fPtr);
}
}
int indexOf(FILE *fptr, const char *word, int *line, int *col)
{
    char str[BUFFER_SIZE];
    char *pos;
    *line = -1;
    *col  = -1;
    while ((fgets(str, BUFFER_SIZE, fptr)) != NULL)
    {
        *line += 1;


        // Find first occurrence of word in str
        pos = strstr(str, word);


        if (pos != NULL)
        {
            // First index of word in str is
            // Memory address of pos - memory
            // address of str.


            *col = (pos - str);
            col++;
            break;
        }
    }
    // If word is not found then set line to -1
    if (*col == -1)
        *line = -1;


    return *col;


}

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Deleting line 50, and putting this in place of lines 38-39 will get you first occurance on each line, but not all:

Code:

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indexOf(fPtr, newWord, &line, &col);
while (line != -1) {
  printf("line: %d, col: %d\n", line+1, col + 1);
  indexOf(fPtr, newWord, &line, &col); }

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