Form, Forces, and Lessons of Unix Architectural Evolution
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
The Challenges of Dynamic Network Interfaces
The Challenges of Dynamic Network Interfaces by Brooks Davis brooks@{aero,FreeBSD}.org The Aerospace Corporation The FreeBSD Project EuroBSDCon 2004 October 29-31, 2004 Karlsruhe, Germany Introduction ● History of Dynamic Interfaces ● Problems ● Possible Solutions ● Advice to Implementors ● Future Work Early UNIX ● Totally static. ● All devices must be compiled in to kernel ● Fast and easy to program ● Difficult to maintain as the number of devices grows Autoconfiguration ● Introduced in 4.1BSD (June 1981) ● One kernel can serve multiple hardware configurations ● Probe – Test for existence of devices, either using stored addresses or matching devices on self-identifying buses ● Attach – Allocate a driver instance (as of 6.0, this must be fully dynamic) Kernel Modules ● Allows drivers to be added at run time ● LKM (Loadable Kernel Modules) – Introduced in 2.0 by Terry Lambert – Modeled after the facility in SunOS ● KLD (dynamic kernel linker) – Introduced along with newbus in 3.0 by Doug Rabson – Added a generic if_detach() function PC Card & CardBus ● Initial PC Card (PCMCIA) support via PAO in 2.0 ● Fairly good support in 3.0 ● Most PAO changes merged in 4.0 – PAO development ceased ● CardBus support in 5.0 Other Removable Devices ● USB Ethernet (4.0) ● Firewire (fwe(4) in 4.8, fwip(4) in 5.3) ● Bluetooth (5.2) ● Hot plug PCI ● Compact PCI ● PCI Express ● Express Card Netgraph ● Node implement network functions ● Arbitrary connection of nodes allowed ● ng_iface(4) node creates interfaces on demand Interface Cloning ● Handles most pseudo -
Katalog Elektronskih Knjiga
KATALOG ELEKTRONSKIH KNJIGA Br Autor Naziv Godina ISBN Str. Porijeklo izdavanja 1 Peter Kent Pay Per Click Search 2006 0-471-74594-3 130 Kupovina Engine Marketing for Dummies 2 Terry Large Access 1 2007 Internet Freeware 3 Kevin Smith Excel Lassons & Tutorials 2004 Internet Freeware 4 Terry Michael Photografy Tutorials 2006 Internet Freeware Janine Peterson Phil Pivnick 5 Jake Ludington Converting Vinyl LPs 2003 Internet Freeware to CD 6 Allen Wyatt Cleaning Windows XP 2004 0-7645-7311-X Poklon for Dummies 7 Peter Kent Sarch Engine Optimization 2006 0-4717-5441-2 Kupovina for Dummies 8 Terry Large Access 2 2007 Internet Freeware 9 Dirk Dupon How to write, create, 2005 Internet Freeware promote and sell E-books on the Internet 10 Chayden Bates eBook Marketing 2000 Internet Freeware Explained 11 Kevin Sinclair How To Choose A 1999 Internet Freeware Homebased Bussines 12 Bob McElwain 101 Newbie-Frendly Tips 2001 Internet Freeware 13 Windows Basics 2004 Poklon 14 Michael Abrash Zen of Graphic 2005 Poklon Programming, 2. izdanje 15 13 Hot Internet 2000 Internet Freeware Moneymaking Methods 16 K. Williams The Complete HTML 1998 Poklon Teacher 17 C. Darwin On the Origin of Species Internet Freeware 2/175 Br Autor Naziv Godina ISBN Str. Porijeklo izdavanja 18 C. Darwin The Variation of Animals Internet Freeware 19 Bruce Eckel Thinking in C++, Vol 1 2000 Internet Freeware 20 Bruce Eckel Thinking in C++, Vol 2 2000 Internet Freeware 21 James Parton Captains of Industry 1890 399 Internet Freeware 22 Bruno R. Preiss Data Structures and 1998 Internet -
UNIX Version 7 Volume 1
UNIXTM TIME-SHARING SYSTEM: UNIX PROGRAMMER'S MANUAL Seventh Edition, Volume 1 January, 1979 Bell Telephone Laboratories, Incorporated Murray Hill, New Jersey PREFACE Although this Seventh Edition no longer bears their byline, Ken Thompson and Dennis Ritchie remain the fathers and preceptors of the UNIX² time-sharing system. Many of the improvements here described bear their mark. Among many, many other people who have contributed to the further ¯owering of UNIX, we wish especially to acknowledge the contributions of A. V. Aho, S. R. Bourne, L. L. Cherry, G. L. Chesson, S. I. Feldman, C. B. Haley, R. C. Haight, S. C. Johnson, M. E. Lesk, T. L. Lyon, L. E. McMahon, R. Morris, R. Muha, D. A. Nowitz, L. Wehr, and P. J. Weinberger. We appreciate also the effective advice and criticism of T. A. Dolotta, A. G. Fraser, J. F. Maranzano, and J. R. Mashey; and we remember the important work of the late Joseph F. Ossanna. B. W. Kernighan M. D. McIlroy __________________ ²UNIX is a Trademark of Bell Laboratories. INTRODUCTION TO VOLUME 1 This volume gives descriptions of the publicly available features of the UNIX² system. It does not attempt to provide perspective or tutorial information upon the UNIX operating system, its facilities, or its implementation. Various documents on those topics are contained in Volume 2. In particular, for an overview see `The UNIX Time-Sharing System' by Ritchie and Thompson; for a tutorial see `UNIX for Beginners' by Kernighan. Within the area it surveys, this volume attempts to be timely, complete and concise. Where the latter two objectives con¯ict, the obvious is often left unsaid in favor of brevity. -
Introduzione Al Mondo Freebsd
Introduzione al mondo FreeBSD Corso avanzato Netstudent Netstudent http://netstudent.polito.it E.Richiardone [email protected] maggio 2009 CC-by http://creativecommons.org/licenses/by/2.5/it/ The FreeBSD project - 1 ·EÁ un progetto software open in parte finanziato ·Lo scopo eÁ mantenere e sviluppare il sistema operativo FreeBSD ·Nasce su CDROM come FreeBSD 1.0 nel 1993 ·Deriva da un patchkit per 386BSD, eredita codice da UNIX versione Berkeley 1977 ·Per problemi legali subisce un rallentamento, release 2.0 nel 1995 con codice royalty-free ·Dalla release 5.0 (2003) assume la struttura che ha oggi ·Disponibile per x86 32 e 64bit, ia64, MIPS, ppc, sparc... ·La mascotte (Beastie) nasce nel 1984 The FreeBSD project - 2 ·Erede di 4.4BSD (eÁ la stessa gente...) ·Sistema stabile; sviluppo uniforme; codice molto chiaro, ordinato e ben commentato ·Documentazione ufficiale ben curata ·Licenza molto permissiva, spesso attrae aziende per progetti commerciali: ·saltuariamente esterni collaborano con implementazioni ex-novo (i.e. Intel, GEOM, atheros, NDISwrapper, ZFS) ·a volte no (i.e. Windows NT) ·Semplificazione di molte caratteristiche tradizionali UNIX Di cosa si tratta Il progetto FreeBSD include: ·Un sistema base ·Bootloader, kernel, moduli, librerie di base, comandi e utility di base, servizi tradizionali ·Sorgenti completi in /usr/src (~500MB) ·EÁ giaÁ abbastanza completo (i.e. ipfw, ppp, bind, ...) ·Un sistema di gestione per software aggiuntivo ·Ports e packages ·Documentazione, canali di assistenza, strumenti di sviluppo ·i.e. Handbook, -
Printed Program
rd International Conference 43 on Software Engineering goes Virtual PROGRAM May 25th –28th 2021 Co-located events: May 17th –May 24th Workshops: May 24th , May 29th –June 4th https://conf.researchr.org/home/icse-2021 @ICSEconf Table of Contents Conference overviews ............................................................... 3 Sponsors and Supporters ......................................................... 11 Welcome letter ........................................................................ 13 Keynotes ................................................................................. 18 Technical Briefings ................................................................. 28 Co-located events .................................................................... 35 Workshops .............................................................................. 36 New Faculty Symposium ........................................................ 37 Doctoral Symposium .............................................................. 39 Detailed Program - Tuesday, May 25th .................................................... 42 - Wednesday, May 26th ............................................... 53 - Thursday, May 27th .................................................. 66 - Friday, May 28th ....................................................... 80 Awards .................................................................................... 91 Social and Networking events ................................................. 94 Organizing Committee ........................................................ -
Rve P.Vp:Corelventura
® M-8400RVe Thermal Transfer Printer Operator and Technical Reference Manual PN 9001075A SATO America, Inc. 10350-A Nations Ford Rd. Charlotte, NC 28273 Main Phone: (704) 644-1650 Fax: (704) 644-1661 Technical Support Hotline: (704) 644-1660 E-Mail:[email protected] © Copyright 2000 SATO America, Inc. Warning: This equipment complies with the requirements in Part 15 of FCC rules for a Class A computing device. Operation of this equipment in a residential area may cause unacceptable interference to radio and TV reception requiring the operator to take whatever steps are necessary to correct the interference. All rights reserved. No part of this document may be reproduced or issued to third parties in any form whatsoever without the express permission of SATO America, Inc. The materials in this document is provided for general information and is subject to change without notice. SATO America, Inc. assumes no responibilities for any errors that may appear. SATOM8400RVe PREFACE M-8400RVe PRINTER OPERATOR’S MANUAL The M-8400RVe Printer Operator’s Manual contains basic information about the printer such as setup, installation, cleaning and maintenance. It also contains complete instructions on how to use the operator panel to configure the printer. The following is a brief description of each section in this manual. SECTION 1. PRINTER OVERVIEW This section contains a discussion of the printer specifications and optional features. SECTION 2. INSTALLATION This section contains instructions on how to unpack and set up the printer, load the labels and ribbon. SECTION 3. CONFIGURATION This section contains instructions on how to configure the printer using the DIP switches and the LCD/Menu/Control panel. -
The Challenges of Dynamic Network Interfaces
The Challenges of Dynamic Network Interfaces Brooks Davis The FreeBSD Project Seattle, WA brooks@{aero,FreeBSD}.org Abstract vices to the modern age of near complete dynamism. Following this history, the problems caused by this dynamism are discussed in detail. Then solutions to On early BSD systems, network interfaces were some of these problems are proposed and analyzed, static objects created at kernel compile time. To- and advice to implementers of userland applications day the situation has changed dramatically. PC is given. Finally, the issues are summarized and fu- Card, USB, and other removable buses allow hard- ture work is discussed. ware interfaces to arrive and depart at run time. Pseudo-device cloning also allows pseudo-devices to be created dynamically. Additionally, in FreeBSD and Dragonfly, interfaces can be renamed by the ad- 2 History ministrator. With these changes, interfaces are now dynamic objects which may appear, change, or dis- appear at any time. This dynamism invalidates a In early versions of UNIX, the exact set of devices number of assumptions that have been made in the on the system had to be compiled in to the kernel. If kernel, in external programs, and even in standards the administrator attempted to use a device which such as SNMP. This paper explores the history of was compiled in, but not installed, a panic or hang the transition of network interfaces from static to dy- was nearly certain. This system was easy to pro- namic. Issues raised by these changes are discussed gram and efficient to execute. Unfortunately, it was and possible solutions suggested. -
PC-BSD 9 Turns a New Page
CONTENTS Dear Readers, Here is the November issue. We are happy that we didn’t make you wait for it as long as for October one. Thanks to contributors and supporters we are back and ready to give you some usefull piece of knowledge. We hope you will Editor in Chief: Patrycja Przybyłowicz enjoy it as much as we did by creating the magazine. [email protected] The opening text will tell you What’s New in BSD world. It’s a review of PC-BSD 9 by Mark VonFange. Good reading, Contributing: especially for PC-BSD users. Next in section Get Started you Mark VonFange, Toby Richards, Kris Moore, Lars R. Noldan, will �nd a great piece for novice – A Beginner’s Guide To PF Rob Somerville, Erwin Kooi, Paul McMath, Bill Harris, Jeroen van Nieuwenhuizen by Toby Richards. In Developers Corner Kris Moore will teach you how to set up and maintain your own repository on a Proofreaders: FreeBSD system. It’s a must read for eager learners. Tristan Karstens, Barry Grumbine, Zander Hill, The How To section in this issue is for those who enjoy Christopher J. Umina experimenting. Speed Daemons by Lars R Noldan is a very good and practical text. By reading it you can learn Special Thanks: how to build a highly available web application server Denise Ebery with advanced networking mechanisms in FreeBSD. The Art Director: following article is the �nal one of our GIS series. The author Ireneusz Pogroszewski will explain how to successfully manage and commission a DTP: complex GIS project. -
Manually-Allocated Contributions in Research Unix Editions Identifier Name Contributions Aho Alfred V
Table 1: Manually-Allocated Contributions in Research Unix Editions Identifier Name Contributions aho Alfred V. Aho awk, dbm, egrep, fgrep, libdbm bsb Brenda S. Baker struct bwk Brian W. Kernighan adv, awk, beg, beginners, ctut, ed, edtut, eqn, eqnchar, learn, m4, neqn, rat, ratfor, trofftut, uprog csr C. S. Roberts tss dan D. A. Nowitz uucp dmr Dennis Ritchie a.out, ar, as, assembler, atan, bcd, c, cacm, cat, cc, cdb, check, chmod, chown, cmp, core, cp, ctime, ctour, date, db, dev, df, dir, dmr, dp, dsw, du, ed, exit, exp, f77, fc, fort, fptrap, getc, getty, glob, goto, hypot, if, init, iolib, iosys, istat, ld, libc, ln, login, ls, m4, man2, man3, man4, mesg, mkdir, mount, mv, nm, od, pr, ptx, putc, regen, rew, rf, rk, rm, rmdir, rp, secur, security, setup, sh, sin, sort, sqrt, strip, stty, su, switch, tp, tty, type, umount, unix, uprog, utmp, who, write, wtmp doug Doug McIlroy diff, echo, graph, join, look, m6, sort, spell, spline, tmg jfm J. F. Maranzano adb jfo Joe Ossanna azel, ed, getty, nroff, ov, roff, s7, stty, troff, wc ken Ken Thompson ar, atan, atof, bas, bj, bproc, cacm, cal, cat, check, chess, chmod, chown, core, cp, dc, dd, df, dir, dli, dp, dsw, dtf, ed, exp, f77, fc, fed, form, fort, fptrap, getty, grep, hypot, implement, init, itoa, ken, libplot, ln, log, login, ls, mail, man, man2, man4, mesg, mkdir, moo, mount, mv, nlist, nm, od, password, plot, pr, qsort, rew, rf, rk, rm, rmdir, roff, rp, sa, sh, sin, sort, sqrt, stty, su, sum, switch, sync, sys, tabs, tp, ttt, tty, umount, uniq, unix, utmp, who, write, wtmp lem Lee E. -
Absolute BSD—The Ultimate Guide to Freebsd Table of Contents Absolute BSD—The Ultimate Guide to Freebsd
Absolute BSD—The Ultimate Guide to FreeBSD Table of Contents Absolute BSD—The Ultimate Guide to FreeBSD............................................................................1 Dedication..........................................................................................................................................3 Foreword............................................................................................................................................4 Introduction........................................................................................................................................5 What Is FreeBSD?...................................................................................................................5 How Did FreeBSD Get Here?..................................................................................................5 The BSD License: BSD Goes Public.......................................................................................6 The Birth of Modern FreeBSD.................................................................................................6 FreeBSD Development............................................................................................................7 Committers.........................................................................................................................7 Contributors........................................................................................................................8 Users..................................................................................................................................8 -
A Dataset of Open-Source Safety-Critical Software⋆
A Dataset of Open-Source Safety-Critical Software? Rafaila Galanopoulou[0000−0002−5318−9017] and Diomidis Spinellis[0000−0003−4231−1897] Department of Management Science and Technology Athens University of Economics and Business Patission 76, Athens, 10434, Greece ft8160018,[email protected] https://www.aueb.gr Abstract. We describe the method used to create a dataset of open- source safety-critical software, such as that used for autonomous cars, healthcare, and autonomous aviation, through a systematic and rigorous selection process. The dataset can be used for empirical studies regard- ing the quality assessment of safety-critical software, its dependencies, and its development process, as well as comparative studies considering software from other domains. Keywords: open-source · safety-critical · dataset 1 Introduction Safety-critical systems (SCS) are those whose failure could result in loss of life, significant property damage, or damage to the environment [5]. Over the past decades ever more software is developed and released as open-source software (OSS) | with licenses that allow its free use, study, change, and distribution [1]. The increasing adoption of open-source software in safety-critical systems [10], such as those used in the medical, aerospace, and automotive industries, poses an interesting challenge. On the one hand, it shortens time to delivery and lowers development costs [6]. On the other hand, it introduces questions regarding the system's quality. For a piece of software to be part of a safety-critical application it requires quality assurance, because quality is a crucial factor of an SCS's software [3]. This assurance demands that evidence regarding OSS quality is supplied, and an analysis is needed to assess if the certification cost is worthwhile. -
Www . Electricalpartmanuals . Com' Com .·�
. -� GEH-764AB SupiJf'sedes GEH-764AA com . Polyphase Switc.hboard ) :., ltatt... our Meters -.:-.. / ii' . _/ •, TYPES DS-19, DSW-19, DSM�19, DS-20, DSW-20 DSM-20, DS-341 DSW-341. DSM-341 DS-35 c DSW-351 DSM-35, DS-381 DSW-381 DSM-38 DS-39 I . DSW·-39:· DSM-39 I DS-40 I DSM-40 DSW-4 W-41, DSM-411 DS-43 DSW-441 DSM-44 ElectricalPartManuals . GENERAL . ELECTRIC www . ElectricalPartManuals . com' com .·� . TYPES COVERED • TWO-ELEMENT CONSTRUCTION THREE-ELEMENT CONSTRUCTION DS-19, DSW-19, DSM-19 (Surface Mount DS-20, DSW-20, DSM-20 (Surface Mount ing) ing) DS-34, DSW-34, DSM-34 (Semiflush Mount DS-35, DSW-35, DSM-35 (Semiflush Mount ing) ing) DS-38, DSW-38, DSM-38 (Drawout, Semi DS-39, DSW-39, DSM-39 (Drawout, Semi flush Mounting) flush Mounting) DS-40, DSW-40, DSM-40 (Drawout, Surface DS-41, DSW-41, DSM-41 (Drawout, Surface Mounting) Mounting) DS-43, DSW-43, DSM-43 (Drawout, Semi DS-44, DSW-44, DSM-44 (Drawout, Semi flush or Surface Mounting) flush or Surface Mounting) ElectricalPartManuals . These instructions do not purport to cover all details or variations in equipment nor to provide for every possible contingency to be met in connection with installation, operation or maintenance. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser's purposes, the matter should be referred to the General Electric Company. 0 2 www . ElectricalPartManuals . com c POLYPHASE com SWITCHBOARD WATTHOUR METERS . The Types DS-19, DS-34, DS-38, DS-40, and DS-43 next inserted completing the electric circuits through meters are back-connected, switchboard, two-stator, the meter and locking the latch on the cradle.