tell(3C) Standard C Library Functions tell(3C)NAMEtell - 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 ALSOlseek(2), attributes(5)SunOS 5.10 28 Jan 1998 tell(3C)
