Expect Basics
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C Strings and Pointers
Software Design Lecture Notes Prof. Stewart Weiss C Strings and Pointers C Strings and Pointers Motivation The C++ string class makes it easy to create and manipulate string data, and is a good thing to learn when rst starting to program in C++ because it allows you to work with string data without understanding much about why it works or what goes on behind the scenes. You can declare and initialize strings, read data into them, append to them, get their size, and do other kinds of useful things with them. However, it is at least as important to know how to work with another type of string, the C string. The C string has its detractors, some of whom have well-founded criticism of it. But much of the negative image of the maligned C string comes from its abuse by lazy programmers and hackers. Because C strings are found in so much legacy code, you cannot call yourself a C++ programmer unless you understand them. Even more important, C++'s input/output library is harder to use when it comes to input validation, whereas the C input/output library, which works entirely with C strings, is easy to use, robust, and powerful. In addition, the C++ main() function has, in addition to the prototype int main() the more important prototype int main ( int argc, char* argv[] ) and this latter form is in fact, a prototype whose second argument is an array of C strings. If you ever want to write a program that obtains the command line arguments entered by its user, you need to know how to use C strings. -
Pexpect Documentation Release 4.8
Pexpect Documentation Release 4.8 Noah Spurrier and contributors Apr 17, 2021 Contents 1 Installation 3 1.1 Requirements...............................................3 2 API Overview 5 2.1 Special EOF and TIMEOUT patterns..................................6 2.2 Find the end of line – CR/LF conventions................................6 2.3 Beware of + and * at the end of patterns.................................7 2.4 Debugging................................................8 2.5 Exceptions................................................8 2.6 Pexpect on Windows...........................................9 3 API documentation 11 3.1 Core pexpect components........................................ 11 3.2 fdpexpect - use pexpect with a file descriptor.............................. 23 3.3 popen_spawn - use pexpect with a piped subprocess.......................... 23 3.4 replwrap - Control read-eval-print-loops................................. 24 3.5 pxssh - control an SSH session...................................... 25 4 Examples 33 5 FAQ 35 6 Common problems 39 6.1 Threads.................................................. 39 6.2 Timing issue with send() and sendline()................................. 39 6.3 Truncated output just before child exits................................. 40 6.4 Controlling SSH on Solaris....................................... 40 6.5 child does not receive full input, emits BEL............................... 40 7 History 41 7.1 Releases................................................. 41 7.2 Moves and forks............................................ -
Ajuba Solutions Version 1.4 COPYRIGHT Copyright © 1998-2000 Ajuba Solutions Inc
• • • • • • Ajuba Solutions Version 1.4 COPYRIGHT Copyright © 1998-2000 Ajuba Solutions Inc. All rights reserved. Information in this document is subject to change without notice. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic or mechanical, including but not limited to photocopying or recording, for any purpose other than the purchaser’s personal use, without the express written permission of Ajuba Solutions Inc. Ajuba Solutions Inc. 2593 Coast Avenue Mountain View, CA 94043 U.S.A http://www.ajubasolutions.com TRADEMARKS TclPro and Ajuba Solutions are trademarks of Ajuba Solutions Inc. Other products and company names not owned by Ajuba Solutions Inc. that appear in this manual may be trademarks of their respective owners. ACKNOWLEDGEMENTS Michael McLennan is the primary developer of [incr Tcl] and [incr Tk]. Jim Ingham and Lee Bernhard handled the Macintosh and Windows ports of [incr Tcl] and [incr Tk]. Mark Ulferts is the primary developer of [incr Widgets], with other contributions from Sue Yockey, John Sigler, Bill Scott, Alfredo Jahn, Bret Schuhmacher, Tako Schotanus, and Kris Raney. Mark Diekhans and Karl Lehenbauer are the primary developers of Extended Tcl (TclX). Don Libes is the primary developer of Expect. TclPro Wrapper incorporates compression code from the Info-ZIP group. There are no extra charges or costs in TclPro due to the use of this code, and the original compression sources are freely available from http://www.cdrom.com/pub/infozip or ftp://ftp.cdrom.com/pub/infozip. NOTE: TclPro is packaged on this CD using Info-ZIP’s compression utility. -
GNU Grep: Print Lines That Match Patterns Version 3.7, 8 August 2021
GNU Grep: Print lines that match patterns version 3.7, 8 August 2021 Alain Magloire et al. This manual is for grep, a pattern matching engine. Copyright c 1999{2002, 2005, 2008{2021 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled \GNU Free Documentation License". i Table of Contents 1 Introduction ::::::::::::::::::::::::::::::::::::: 1 2 Invoking grep :::::::::::::::::::::::::::::::::::: 2 2.1 Command-line Options ::::::::::::::::::::::::::::::::::::::::: 2 2.1.1 Generic Program Information :::::::::::::::::::::::::::::: 2 2.1.2 Matching Control :::::::::::::::::::::::::::::::::::::::::: 2 2.1.3 General Output Control ::::::::::::::::::::::::::::::::::: 3 2.1.4 Output Line Prefix Control :::::::::::::::::::::::::::::::: 5 2.1.5 Context Line Control :::::::::::::::::::::::::::::::::::::: 6 2.1.6 File and Directory Selection:::::::::::::::::::::::::::::::: 7 2.1.7 Other Options ::::::::::::::::::::::::::::::::::::::::::::: 9 2.2 Environment Variables:::::::::::::::::::::::::::::::::::::::::: 9 2.3 Exit Status :::::::::::::::::::::::::::::::::::::::::::::::::::: 12 2.4 grep Programs :::::::::::::::::::::::::::::::::::::::::::::::: 13 3 Regular Expressions ::::::::::::::::::::::::::: 14 3.1 Fundamental Structure :::::::::::::::::::::::::::::::::::::::: -
Cygwin User's Guide
Cygwin User’s Guide Cygwin User’s Guide ii Copyright © Cygwin authors Permission is granted to make and distribute verbatim copies of this documentation provided the copyright notice and this per- mission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this documentation under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Permission is granted to copy and distribute translations of this documentation into another language, under the above conditions for modified versions, except that this permission notice may be stated in a translation approved by the Free Software Foundation. Cygwin User’s Guide iii Contents 1 Cygwin Overview 1 1.1 What is it? . .1 1.2 Quick Start Guide for those more experienced with Windows . .1 1.3 Quick Start Guide for those more experienced with UNIX . .1 1.4 Are the Cygwin tools free software? . .2 1.5 A brief history of the Cygwin project . .2 1.6 Highlights of Cygwin Functionality . .3 1.6.1 Introduction . .3 1.6.2 Permissions and Security . .3 1.6.3 File Access . .3 1.6.4 Text Mode vs. Binary Mode . .4 1.6.5 ANSI C Library . .4 1.6.6 Process Creation . .5 1.6.6.1 Problems with process creation . .5 1.6.7 Signals . .6 1.6.8 Sockets . .6 1.6.9 Select . .7 1.7 What’s new and what changed in Cygwin . .7 1.7.1 What’s new and what changed in 3.2 . -
Scons API Docs Version 4.2
SCons API Docs version 4.2 SCons Project July 31, 2021 Contents SCons Project API Documentation 1 SCons package 1 Module contents 1 Subpackages 1 SCons.Node package 1 Submodules 1 SCons.Node.Alias module 1 SCons.Node.FS module 9 SCons.Node.Python module 68 Module contents 76 SCons.Platform package 85 Submodules 85 SCons.Platform.aix module 85 SCons.Platform.cygwin module 85 SCons.Platform.darwin module 86 SCons.Platform.hpux module 86 SCons.Platform.irix module 86 SCons.Platform.mingw module 86 SCons.Platform.os2 module 86 SCons.Platform.posix module 86 SCons.Platform.sunos module 86 SCons.Platform.virtualenv module 87 SCons.Platform.win32 module 87 Module contents 87 SCons.Scanner package 89 Submodules 89 SCons.Scanner.C module 89 SCons.Scanner.D module 93 SCons.Scanner.Dir module 93 SCons.Scanner.Fortran module 94 SCons.Scanner.IDL module 94 SCons.Scanner.LaTeX module 94 SCons.Scanner.Prog module 96 SCons.Scanner.RC module 96 SCons.Scanner.SWIG module 96 Module contents 96 SCons.Script package 99 Submodules 99 SCons.Script.Interactive module 99 SCons.Script.Main module 101 SCons.Script.SConsOptions module 108 SCons.Script.SConscript module 115 Module contents 122 SCons.Tool package 123 Module contents 123 SCons.Variables package 125 Submodules 125 SCons.Variables.BoolVariable module 125 SCons.Variables.EnumVariable module 125 SCons.Variables.ListVariable module 126 SCons.Variables.PackageVariable module 126 SCons.Variables.PathVariable module 127 Module contents 127 SCons.compat package 129 Module contents 129 Submodules 129 SCons.Action -
A Multiplatform Pseudo Terminal
A Multi-Platform Pseudo Terminal API Project Report Submitted in Partial Fulfillment for the Masters' Degree in Computer Science By Qutaiba Mahmoud Supervised By Dr. Clinton Jeffery ABSTRACT This project is the construction of a pseudo-terminal API, which will provide a pseudo-terminal interface access to interactive programs. The API is aimed at developing an extension to the Unicon language to allow Unicon programs to easily utilize applications that require user interaction via a terminal. A pseudo-terminal is a pair of virtual devices that provide a bidirectional communication channel. This project was constructed to enable an enhancement to a collaborative virtual environment, because it will allow external tools such to be utilized within the same environment. In general the purpose of this API is to allow the UNICON runtime system to act as the user via the terminal which is provided by the API, the terminal is in turn connected to a client process such as a compiler, debugger, or an editor. It can also be viewed as a way for the UNICON environment to control and customize the input and output of external programs. Table of Contents: 1. Introduction 1.1 Pseudo Terminals 1.2 Other Terminals 1.3 Relation To Other Pseudo Terminal Applications. 2. Methodology 2.1 Pseudo Terminal API Function Description 3. Results 3.1 UNIX Implementation 3.2 Windows Implementation 4. Conclusion 5. Recommendations 6. References Acknowledgments I would like to thank my advisor, Dr. Clinton Jeffery, for his support, patience and understanding. Dr. Jeffery has always been prompt in delivering and sharing his knowledge and in providing his assistance. -
Networking Telnet
IBM i Version 7.2 Networking Telnet IBM Note Before using this information and the product it supports, read the information in “Notices” on page 99. This edition applies to IBM i 7.2 (product number 5770-SS1) and to all subsequent releases and modifications until otherwise indicated in new editions. This version does not run on all reduced instruction set computer (RISC) models nor does it run on CISC models. This document may contain references to Licensed Internal Code. Licensed Internal Code is Machine Code and is licensed to you under the terms of the IBM License Agreement for Machine Code. © Copyright International Business Machines Corporation 1998, 2013. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Telnet................................................................................................................... 1 What's new for IBM i 7.2..............................................................................................................................1 PDF file for Telnet........................................................................................................................................ 1 Telnet scenarios...........................................................................................................................................2 Telnet scenario: Telnet server configuration.........................................................................................2 Telnet scenario: Cascaded Telnet -
Aspera CLI User Guide
Aspera Command- Line Interface Guide 3.7.7 Mac OS X Revision: 74 Generated: 09/25/2018 16:52 Contents Introduction............................................................................................................... 3 System Requirements............................................................................................... 3 Installation................................................................................................................. 3 Installing the Aspera CLI.....................................................................................................................................3 Configuring for Faspex.........................................................................................................................................4 Configuring for Aspera on Cloud........................................................................................................................ 4 Uninstalling........................................................................................................................................................... 5 aspera: The Command-Line Transfer Client........................................................ 5 About the Command-Line Client.........................................................................................................................5 Prerequisites.......................................................................................................................................................... 6 aspera Command Reference................................................................................................................................ -
An Empirical Investigation Into Programming Language Syntax
i i i i An Empirical Investigation into Programming Language Syntax ANDREAS STEFIK, University of Nevada, Las Vegas SUSANNA SIEBERT, The Genome Institute, Washington University School of Medicine Recent studies in the literature have shown that syntax remains a significant barrier to novice computer science students in the field. While this syntax barrier is known to exist, whether and how it varies across programming languages has not been carefully investigated. For this article, we conducted four empirical studies on programming language syntax as part of a larger analysis into the, so called, programming language wars. We first present two surveys conducted with students on the intuitiveness of syntax, which we used to garner formative clues on what words and symbols might be easy for novices to understand. We followed up with two studies on the accuracy rates of novices using a total of six programming languages: Ruby, Java, Perl, Python, Randomo, and Quorum. Randomo was designed by randomly choosing some keywords from the ASCII table (a metaphorical placebo). To our surprise, we found that languages using a more traditional C-style syntax (both Perl and Java) did not afford accuracy rates significantly higher than a language with randomly generated keywords, but that languages which deviate (Quorum, Python, and Ruby) did. These results, including the specifics of syntax that are particularly problematic for novices, may help teachers of introductory programming courses in choosing appropriate first languages and in helping students to overcome the challenges they face with syntax. Categories and Subject Descriptors: D.3 [Programming Languages]; H.1.2 [Information Systems]: User/Machine Systems—Software psychology General Terms: Design, Experimentation, Human Factors, Standardization Additional Key Words and Phrases: Programming Languages, Novice Programmers, Syntax ACM Reference Format: Stefik, A. -
Bash Guide for Beginners
Bash Guide for Beginners Machtelt Garrels Garrels BVBA <tille wants no spam _at_ garrels dot be> Version 1.11 Last updated 20081227 Edition Bash Guide for Beginners Table of Contents Introduction.........................................................................................................................................................1 1. Why this guide?...................................................................................................................................1 2. Who should read this book?.................................................................................................................1 3. New versions, translations and availability.........................................................................................2 4. Revision History..................................................................................................................................2 5. Contributions.......................................................................................................................................3 6. Feedback..............................................................................................................................................3 7. Copyright information.........................................................................................................................3 8. What do you need?...............................................................................................................................4 9. Conventions used in this -
Lab Work 06. Linux Shell. Files Globbing & Streams Redirection
LAB WORK 06. LINUX SHELL. FILES GLOBBING & STREAMS REDIRECTION. 1. PURPOSE OF WORK • Learn to use shell file globbing (wildcard); • Learn basic concepts about standard UNIX/Linux streams redirections; • Acquire skills of working with filter-programs. • Get experience in creating composite commands that have a different functional purpose than the original commands. 2. TASKS FOR WORK NOTE. Start Your UbuntuMini Virtual Machine on your VirtualBox. You need only Linux Terminal to complete the lab tasks. Before completing the tasks, make a Snapshot of your Virtual Linux. If there are problems, you can easily go back to working condition! 2.0. Create new User account for this Lab Work. • Login as student account (user with sudo permissions). • Create new user account, example stud. Use adduser command. (NOTE. You can use the command “userdel –rf stud” to delete stud account from your Linux.) $ sudo adduser stud • Logout from student account (logout) and login as stud. 2.1. Shell File Globbing Study. 2.2. File Globbing Practice. (Fill in a Table 1 and Table 2) 2.3. Command I/O Redirection Study. 2.4. Redirection Practice. (Fill in a Table 3 and Table 4) © Yuriy Shamshin, 2021 1/20 3. REPORT Make a report about this work and send it to the teacher’s email (use a docx Report Blank). REPORT FOR LAB WORK 06: LINUX SHELL. FILES GLOBBING & STREAMS REDIRECTION Student Name Surname Student ID (nV) Date 3.1. Insert Completing Table 1. File globbing understanding. 3.2. Insert Completing Table 2. File globbing creation. 3.3. Insert Completing Table 3. Command I/O redirection understanding.