long long explain_lseek_or_die(int fildes, long long offset, int whence);
DESCRIPTION
The explain_lseek_or_die function is used to call the
lseek(2) system call. On failure an explanation will be printed
to stderr, obtained from explain_lseek(3), and then
the process terminates by calling exit(EXIT_FAILURE).
This function is intended to be used in a fashion
similar to the following example:
long long result = explain_lseek_or_die(fildes, offset, whence);
fildes
The fildes, exactly as to be passed to the lseek(2) system call.
offset
The offset, exactly as to be passed to the lseek(2) system call.
whence
The whence, exactly as to be passed to the lseek(2) system call.
Returns:
On successful, returns the resulting offset location as measured in
bytes from the beginning of the file. On failure, prints an explanation
and exits.