C program to find the size of a file in Linux.

/*C program to find the size of a file in Linux.*/

 

#include <stdio.h>

#include <sys/stat.h>

 

/*function to get size of the file.*/

long int findSize(const char *file_name)

{

    struct stat st; /*declare stat variable*/

     

    /*get the size using stat()*/

     

    if(stat(file_name,&st)==0)

        return (st.st_size);

    else

        return -1;

}

 

int main()

{

    char i;

    FILE *fp; /*to create file*/

    long int size=0;

 

    /*Open file in write mode*/

    fp=fopen("temp.txt","w");

     

    /*writing A to Z characters into file*/

    for(i='A';i<='Z';i++)

        fputc(i,fp);

     

    /*close the file*/

    fclose(fp);

     

    /*call function to get size*/

    size=findSize("temp.txt");

     

    if(size!=-1)

        printf("File size is: %ld\n",size);

    else

        printf("There is some ERROR.\n");

     

    return 0;

}