_eof

Tests for end-of-file.

int_eof(inthandle**);**

For additional compatibility information, see Compatibility in the Introduction.

Libraries

Return Value

_eof returns 1 if the current position is end of file, or 0 if it is not. A return value of –1 indicates an error; in this case, errno is set to EBADF, which indicates an invalid file handle.

Parameter

handle

Handle referring to open file

Remarks

The _eof function determines whether the end of the file associated with handle has been reached.

Example

/* EOF.C: This program reads data from a file
 * ten bytes at a time until the end of the
 * file is reached or an error is encountered.
 */
#include <io.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
void main( void )
{
   int  fh, count, total = 0;
   char buf[10];
   if( (fh = _open( "eof.c", _O_RDONLY )) == - 1 )
   {
        perror( "Open failed");
        exit( 1 );
   }
   /* Cycle until end of file reached: */
   while( !_eof( fh ) )
   {
      /* Attempt to read in 10 bytes: */
      if( (count = _read( fh, buf, 10 )) == -1 )
      {
         perror( "Read error" );
         break;
      }
      /* Total actual bytes read */
      total += count;
   }
   printf( "Number of bytes read = %d\n", total );
   _close( fh );
}

Output

Number of bytes read = 754

Error Handling Routines, Low-level I/O Routines

See Also   clearerr, feof, ferror, perror