mirror of
https://github.com/cc65/cc65.git
synced 2024-07-06 13:29:01 +00:00
28 lines
429 B
C
28 lines
429 B
C
/*
|
|
* ftell.c
|
|
*
|
|
* Christian Groessler, 07-Aug-2000
|
|
*/
|
|
|
|
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include "_file.h"
|
|
|
|
|
|
long ftell(FILE* f)
|
|
{
|
|
long pos;
|
|
|
|
/* Is the file open? */
|
|
if ((f->f_flags & _FOPEN) == 0) {
|
|
_errno = EINVAL; /* File not open */
|
|
return -1L;
|
|
}
|
|
|
|
pos = lseek(f->f_fd, 0L, SEEK_CUR);
|
|
return pos; /* -1 for error, comes from lseek() */
|
|
}
|
|
|