fgetpos

Stores the current file position for a given file.

Format

#include  <stdio.h>

int fgetpos  (FILE *stream, fpos_t *pos);

Arguments

stream

A file pointer.

pos

A pointer to an implementation-defined structure. The fgetpos function fills this structure with information that can be used on subsequent calls to fsetpos.

Description

Return Values

0	Indicates successful completion.
-1	Indicates that there are errors.

Example

#include <stdio.h>

main()
{
FILE *fp;
int stat,i;
int character;
unsigned char ch, c_ptr[130], d_ptr[130];
fpos_t posit;

/* Open a file for writing.  */

if ((fp = fopen ("file.dat","w+") ) == NULL)
    {
     perror ("open");
     exit(1);
    }

/* Get the beginning position in the file.  */

if (fgetpos(fp, &posit) != 0)
   perror ("fgetpos");

/* Write some data to the file. */

if (fprintf(fp,"this is a test\n") == 0)
   {
    perror ("fprintf");
    exit(1);
   }

/* Set the file position back to the beginning. */

if(fsetpos(fp, &posit) != 0)
    perror ("fsetpos");

fgets(c_ptr,130,fp);
puts(c_ptr);  /* Should be "this is a test."  */

/* Close the file. */

if (fclose (fp) != 0)
    {
     perror ("close");
     exit(1);
    }

}