https://homeostasis.scs.carleton.ca/wiki/index.php?action=history&feed=atom&title=Operating_Systems_2021F_Lecture_11 2026-04-06T04:46:31Z Revision history for this page on the wiki MediaWiki 1.42.1 https://homeostasis.scs.carleton.ca/wiki/index.php?title=Operating_Systems_2021F_Lecture_11&diff=23414&oldid=prev 2021-10-14T20:58:06Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 20:58, 14 October 2021</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">==Video==</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Video from the lecture given on October 14, 2021 is now available:</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* [https://homeostasis.scs.carleton.ca/~soma/os-2021f/lectures/comp3000-2021f-lec11-20211014.m4v video]</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* [https://homeostasis.scs.carleton.ca/~soma/os-2021f/lectures/comp3000-2021f-lec11-20211014.cc.vtt auto-generated captions]</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Video is also available through Brightspace (Resources-&gt;Class zoom meetings-&gt;Cloud Recordings tab)</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Notes==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Notes==</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> </table>

Soma https://homeostasis.scs.carleton.ca/wiki/index.php?title=Operating_Systems_2021F_Lecture_11&diff=23413&oldid=prev 2021-10-14T15:01:59Z

<p>Created page with &quot;==Notes== &lt;pre&gt; Lecture 11 ---------- Midterm review - Assignment 2 solutions - Assignment 1 solutions - key concepts Class will end at 11 - I have to run to the airpor...&quot;</p> <p><b>New page</b></p><div>==Notes==<br /> <br /> &lt;pre&gt;<br /> Lecture 11<br /> ----------<br /> <br /> Midterm review<br /> - Assignment 2 solutions<br /> - Assignment 1 solutions<br /> - key concepts<br /> <br /> Class will end at 11<br /> - I have to run to the airport!<br /> <br /> Most system calls (that would be used in a regular program) have a corresponding library call (that is a thin wrapper around the system call)<br /> - so if you see it in strace there&#039;s probably a way of calling it<br /> <br /> C library functions are pretty cross-platform<br /> - but they are very closely associated with UNIX<br /> <br /> Remember that printf goes to standard out<br /> equivalent to fprint(stdout, ...)<br /> <br /> So fprint(stderr, ...) is going to a different place<br /> - just normally in a terminal 1 and 2 are going to the terminal<br /> (standard out and standard error)<br /> <br /> I don&#039;t expect your solutions to be identical to mine<br /> - you just need to answer the question in a way that shows you understand the key concepts<br /> - there are multiple valid solutions to many of the questions,<br /> but they differ in implementation strategy, not in an<br /> understanding of what is going on<br /> <br /> Kill vs signal<br /> - kill is for sending signals<br /> - signal is for receiving signals<br /> - not quite standardized, so nowadays<br /> you&#039;re supposed to use sigaction, not signal<br /> <br /> The C library defines standard signal handlers for all signals<br /> - most just terminate the process<br /> <br /> Submissions for the midterm will be exactly like the assignments<br /> - submit a text file<br /> - auto grading isn&#039;t possible, as it will almost all be short answer<br /> <br /> Officially 80 minutes<br /> - don&#039;t submit multiple times<br /> - if there are problems, just email your answers to me or<br /> send them via Teams<br /> <br /> If you did the tutorials correctly, the assignments should be pretty straightforward<br /> - so if you found the assignment to be very hard,<br /> rethink how you do tutorials<br /> <br /> Questions during the midterm<br /> - teams<br /> - open zoom (office hours)<br /> - info will be on midterm PDF<br /> <br /> Remember redirecting standard error for a command doesn&#039;t change standard error for the main shell<br /> &lt;/pre&gt;</div>

Soma