The explain_statvfs_or_die function is used to call the
statvfs(2) system call. On failure an explanation will be printed
to stderr, obtained from the explain_statvfs(3) function,
and then the process terminates by calling exit(EXIT_FAILURE).
The explain_statvfs_on_error function is used to call the
statvfs(2) system call. On failure an explanation will be printed
to stderr, obtained from the explain_statvfs(3) function,
but still returns to the caller.
pathname
The pathname, exactly as to be passed to the statvfs(2) system
call.
data
The data, exactly as to be passed to the statvfs(2) system call.
RETURN VALUE
The explain_statvfs_or_die function only returns on success, see
statvfs(2) for more information. On failure, prints an explanation
and exits, it does not return.
The explain_statvfs_on_error function always returns the value
return by the wrapped statvfs(2) system call.
EXAMPLE
The explain_statvfs_or_die function is intended to be used in a
fashion similar to the following example: