Suppose that only file descriptors 1 (stdout), 3 (a read connection from filel ) and 4 (a write connection to filel ) are in use. All others are closed. In this situation, first dup(1) is called. Select all the claims that are correct in this situation. write(0, "Ahoy!", 5); writes to the terminal screen. write(0,"Ahoy!", 5); fails and produces an error. write(1, "Ahoy!", 5); writes to the terminal screen. write(1,"Ahoy!", 5); fails and produces an error. write(2, "Ahoy!", 5); writes to the terminal screen. write(2, "Ahoy!", 5); fails and produces an error.

Suppose that only file descriptors 1 (stdout), 3 (a read connection from filel ) and 4 (a write connection to filel ) are in use. All others are closed. In this situation, first dup(1) is called. Select all the claims that are correct in this situation. write(0, "Ahoy!", 5); writes to the terminal screen. write(0,"Ahoy!", 5); fails and produces an error. write(1, "Ahoy!", 5); writes to the terminal screen. write(1,"Ahoy!", 5); fails and produces an error. write(2, "Ahoy!", 5); writes to the terminal screen. write(2, "Ahoy!", 5); fails and produces an error.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Suppose that only file descriptors 1 (stdout), 3 (a read connection from filel ) and 4 (a write connection to filel ) are in use. All others are
closed.
In this situation, first dup(1) is called.
Select all the claims that are correct in this situation.
write(0, "Ahoy!", 5); writes to the terminal screen.
write(0, "Ahoy!", 5); fails and produces an error.
write(1, "Ahoy!", 5); writes to the terminal screen.
write(1, "Ahoy!", 5); fails and produces an error.
write(2, "Ahoy!", 5); writes to the terminal screen.
write(2, "Ahoy!", 5); fails and produces an error.

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