added LaTeX code
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@ -74,7 +74,7 @@ dkms.conf
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# these rules might exclude image files for figures etc.
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# these rules might exclude image files for figures etc.
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# *.ps
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# *.ps
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# *.eps
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# *.eps
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# *.pdf
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*.pdf
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## Generated if empty string is given at "Please type another file name for output:"
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## Generated if empty string is given at "Please type another file name for output:"
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.pdf
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.pdf
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179
LaTeX/Homework_Lesson_4.tex
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LaTeX/Homework_Lesson_4.tex
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\documentclass[a4paper, 12pt, english]{article}
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\usepackage[utf8]{inputenc}
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\usepackage[T1]{fontenc}
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\usepackage{listings}
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\usepackage{xcolor}
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\usepackage{hyperref}
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\usepackage{multicol}
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\usepackage{setspace}
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\title{Advanced Operating Systems\\Assignment Week 4}
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\author{Paul Lödige \\ Student ID: 37-229753}
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\makeatletter
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\newcommand*{\toccontents}{\@starttoc{toc}}
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\makeatother
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\begin{document}
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\maketitle
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\toccontents
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\section{Assignment}%
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\label{sec:Assignment}
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Modify the kernel module you created in the \#3 Homework to introduce the ioctl mechanism that sets and gets messages.
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Compile and run the program.
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You should also write a user-space program that calls ioctl().
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Submit the source code and the screen shot of the result of execution displayed by the dmesg command.
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\clearpage
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\section{Code}%
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\label{sec:Code}
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\definecolor{mGreen}{rgb}{0,0.6,0}
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\definecolor{mGray}{rgb}{0.5,0.5,0.5}
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\definecolor{mPurple}{rgb}{0.58,0,0.82}
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\definecolor{backgroundColour}{rgb}{0.95,0.95,0.92}
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\lstset{
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language=C,
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backgroundcolor=\color{backgroundColour},
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commentstyle=\color{mGreen},
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keywordstyle=\color{magenta},
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numberstyle=\tiny\color{mGray},
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stringstyle=\color{mPurple},
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basicstyle=\ttfamily\scriptsize,
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breakatwhitespace=false,
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breaklines=true,
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captionpos=b,
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keepspaces=true,
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numbers=left,
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firstnumber=0,
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stepnumber=1,
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numbersep=5pt,
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showspaces=false,
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showstringspaces=false,
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showtabs=false,
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tabsize=2,
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literate={~}{{$\mathtt{\sim}$}}1
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}
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\lstset{literate=%
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{Ö}{{\"O}}1
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{Ä}{{\"A}}1
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{Ü}{{\"U}}1
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{ß}{{\ss}}2
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{ü}{{\"u}}1
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{ä}{{\"a}}1
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{ö}{{\"o}}1
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}
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\subsection{Kernel Module Code}%
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\label{sub:Kernel Module Code}
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\subsubsection{\texttt{chardev2.c}}%
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\label{ssub:chardev2}
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\lstinputlisting{../Code/Kernel_Module/chardev2.c}
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\clearpage
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\subsubsection{\texttt{chardev.h}}%
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\label{ssub:chardev}
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\lstinputlisting{../Code/Kernel_Module/chardev.h}
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\clearpage
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\subsection{IOCTL Client Code}%
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\label{sub:IOCTL Client Code}
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\subsubsection{\texttt{userspace\_ioctl.c}}%
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\label{ssub:userspaceioctl}
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\lstinputlisting{../Code/IOCTL_Client/userspace_ioctl.c}
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\clearpage
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\subsubsection{\texttt{chardev.h}}%
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\label{ssub:chardev h}
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\lstinputlisting{../Code/IOCTL_Client/chardev.h}
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\clearpage
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\section{Output of \texttt{sudo cat /proc/devices}}%
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\label{sec:Output of proc devices}
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\begin{multicols}{2}
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\begin{spacing}{.9}
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\texttt{
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Character devices:\\
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1 mem\\
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4 /dev/vc/0\\
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4 tty\\
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4 ttyS\\
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5 /dev/tty\\
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5 /dev/console\\
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5 /dev/ptmx\\
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7 vcs\\
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10 misc\\
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13 input\\
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29 fb\\
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100 char\_dev\\
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116 alsa\\
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128 ptm\\
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136 pts\\
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180 usb\\
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188 ttyUSB\\
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189 usb\_device\\
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202 cpu/msr\\
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203 cpu/cpuid\\
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226 drm\\
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236 binder\\
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237 hidraw\\
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238 wwan\_port\\
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239 nvme-generic\\
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240 nvme\\
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241 aux\\
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242 bsg\\
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243 watchdog\\
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244 remoteproc\\
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245 ptp\\
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246 pps\\
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247 cec\\
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248 lirc\\
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249 rtc\\
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250 dma\_heap\\
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251 dax\\
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252 dimmctl\\
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253 ndctl\\
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254 gpiochip\\
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\columnbreak\\\\
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Block devices:\\
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8 sd\\
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65 sd\\
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66 sd\\
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67 sd\\
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68 sd\\
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69 sd\\
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70 sd\\
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71 sd\\
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128 sd\\
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129 sd\\
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130 sd\\
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131 sd\\
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132 sd\\
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133 sd\\
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134 sd\\
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135 sd\\
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259 blkext\\
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}
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\end{spacing}
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\end{multicols}
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\section{Output of running the \texttt{userspace\_ioctl.c} code}%
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\label{sec:Output of running the userspaceioctl code}
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\texttt{get\_nth\_byte message:Message passed by ioctl}\\
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\texttt{get\_msg message:Message passed by ioctl}
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\section{Output of \texttt{sudo dmesg -T -l info | tail -5}}%
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\label{sec:Output of dmesg}
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\texttt{[Mon Oct 31 11:57:15 2022] Device created on /dev/char\_dev}\\
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\texttt{[Mon Oct 31 11:57:16 2022] device\_open(00000000d7150407)}\\
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\texttt{[Mon Oct 31 11:57:16 2022] device\_write(00000000d7150407,000000001ed918c3,25)}\\
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\texttt{[Mon Oct 31 11:57:16 2022] Read 24 bytes, 75 left}\\
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\texttt{[Mon Oct 31 11:57:16 2022] device\_release(0000000005e64dfb,00000000d7150407)}
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\end{document}
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