tell(3C)
NAME
tell − return a file offset for a file descriptor
SYNOPSIS
#include <unistd.h>
off_t tell(int fd);
DESCRIPTION
The tell() function obtains the current value of the file-position indicator for the file descriptor fd.
RETURN VALUES
Upon successful completion, tell() returns the current value of the file-position indicator for fd measured in bytes from the beginning of the file.
Otherwise, it returns −1 and sets errno to indicate the error.
ERRORS
The tell() function will fail if:
EBADF The file descriptor fd is not an open file descriptor.
EOVERFLOW The current file offset cannot be represented correctly in an object of type off_t.
ESPIPE The file descriptor fd is associated with a pipe or FIFO.
USAGE
The tell() function is equivalent to lseek(fd, 0, SEEK_CUR).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| MT-Level | MT-Safe |
SEE ALSO
SunOS 5.6 — Last change: 22 Apr 1997