c get file size
FILE *fp = fopen("example.txt", "r");
fseek(fp, 0L, SEEK_END);
int size = ftell(fp);c get file size
FILE *fp = fopen("example.txt", "r");
fseek(fp, 0L, SEEK_END);
int size = ftell(fp);how to check the size of a file in linux c
If you have the file stream (FILE * f):
fseek(f, 0, SEEK_END); // seek to end of file
size = ftell(f); // get current file pointer
fseek(f, 0, SEEK_SET); // seek back to beginning of file
// proceed with allocating memory and reading the file
Or,
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
fd = fileno(f);
struct stat buf;
fstat(fd, &buf);
int size = buf.st_size;
Or, use stat, if you know the filename:
#include <sys/stat.h>
struct stat st;
stat(filename, &st);
size = st.st_size;c file size
If you use :
/**
Pay attention to return type!
ftell returns long, which can only be used for files under 2GB.
**/
fseek(f, 0, SEEK_END); // seek to end of file
size = ftell(f); // get current file pointer
fseek(f, 0, SEEK_SET); // seek back to beginning of file
// If u want to get file of large size, use stat() instead
struct stat buf;
if(stat(filename, &buf) == -1){
return -1;
}
return (ssize_t)buf.st_size;size of file in c
// C program to find the size of file
#include <stdio.h>
long int findSize(char file_name[])
{
// opening the file in read mode
FILE* fp = fopen(file_name, "r");
// checking if the file exist or not
if (fp == NULL) {
printf("File Not Found!\n");
return -1;
}
fseek(fp, 0L, SEEK_END);
// calculating the size of the file
long int res = ftell(fp);
// closing the file
fclose(fp);
return res;
}
// Driver code
int main()
{
char file_name[] = { "a.txt" };
long int res = findSize(file_name);
if (res != -1)
printf("Size of the file is %ld bytes \n", res);
return 0;
}Copyright © 2021 Codeinu
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