├── README.md
├── process-view-0.drawio.png
├── process-view-0.drawio.svg
└── process-view-0.drawio.xml


/README.md:
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 1 | # MyViewOfLinuxSystems
 2 | 
 3 | A view from a process within a Linux system towards the world.  
 4 | Dotted arrow means dependencies. [1]
 5 | 
 6 | ![Diagram: A view from a process within a Linux system towards the world. A process leverages devices via abstractions provided by the kernel.](https://github.com/lsc4719/MyViewOfComputerSystem/blob/main/process-view-0.drawio.svg)
 7 | 
 8 | 
 9 | ### ref
10 | How Linux Works, 2nd edition. https://www.yes24.com/Product/Goods/22404368  
11 | FHS 3.0 https://refspecs.linuxfoundation.org/FHS_3.0/fhs-3.0.html  
12 | The Dinosaur Book https://www.amazon.com/Operating-System-Concepts-Binder-Version/dp/1118129385  
13 | OSTEP https://pages.cs.wisc.edu/~remzi/OSTEP/  
14 | Understanding the Linux Kernel, 3rd edition. https://www.amazon.com/Understanding-Linux-Kernel-Third-Daniel/dp/0596005652  
15 | [1]UML Distilled, 3rd edition. https://www.amazon.com/UML-Distilled-Standard-Modeling-Language/dp/0321193687  
16 | 


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/process-view-0.drawio.svg:
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text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 38px; height: 1px; padding-top: 157px; margin-left: 525px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;"><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div>fs hierarchy</div></div></div></foreignObject><text x="544" y="161" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">fs hie...</text></switch></g></g><g><path d="M 644 157 L 681.76 157" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="stroke"/><path d="M 675.88 160.5 L 682.88 157 L 675.88 153.5" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/></g><g><rect x="604" y="137" width="40" height="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 38px; height: 1px; padding-top: 157px; margin-left: 605px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;"><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div>file systems</div></div></div></foreignObject><text x="624" y="161" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">file s...</text></switch></g></g><g><path d="M 724 157 L 760.76 157" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="stroke"/><path d="M 754.88 160.5 L 761.88 157 L 754.88 153.5" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/></g><g><rect x="684" y="137" width="40" height="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 38px; height: 1px; padding-top: 157px; margin-left: 685px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;"><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div>partitions</div></div></div></foreignObject><text x="704" y="161" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">partit...</text></switch></g></g><g><rect x="763" y="137" width="40" height="40" fill="#dae8fc" stroke="#6c8ebf" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 38px; height: 1px; padding-top: 157px; margin-left: 764px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;"><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div>storage devices</div></div></div></foreignObject><text x="783" y="161" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">storag...</text></switch></g></g><g><path d="M 564 57 L 601.76 57" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="stroke"/><path d="M 595.88 60.5 L 602.88 57 L 595.88 53.5" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/></g><g><rect x="524" y="37" width="40" height="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 38px; height: 1px; padding-top: 57px; margin-left: 525px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;"><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div>network interfaces</div></div></div></foreignObject><text x="544" y="61" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">networ...</text></switch></g></g><g><path d="M 200 157 L 162.24 157" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="stroke"/><path d="M 168.12 153.5 L 161.12 157 L 168.12 160.5" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/></g><g><rect x="200" y="137" width="40" height="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 38px; height: 1px; padding-top: 157px; margin-left: 201px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;"><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div>pid</div></div></div></foreignObject><text x="220" y="161" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">pid...</text></switch></g></g><g><rect x="310" y="247" width="60" height="30" fill="none" stroke="none" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 262px; margin-left: 311px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">open<div>read</div><div>write</div><div>close</div><div>lseek</div><div>fstat</div><div>--------</div><div>ioctl</div></div></div></div></foreignObject><text x="340" y="266" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">open...</text></switch></g></g><g><path d="M 644 247 L 681.76 247" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="stroke"/><path d="M 675.88 250.5 L 682.88 247 L 675.88 243.5" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/></g><g><rect x="604" y="227" width="40" height="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 38px; height: 1px; padding-top: 247px; margin-left: 605px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;"><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div>device files</div></div></div></foreignObject><text x="624" y="251" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">device...</text></switch></g></g><g><rect x="310" y="59" width="60" height="30" fill="none" stroke="none" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 74px; margin-left: 311px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">socket<div>bind</div><div>listen</div><div>accept</div><div>connect</div><div>send</div><div>recv</div><div>close</div></div></div></div></foreignObject><text x="340" y="78" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">socket...</text></switch></g></g><g><rect x="230" y="227" width="60" height="30" fill="none" stroke="none" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 242px; margin-left: 231px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">fork<div>exec</div><div>exit</div><div>wait</div><div>kill</div></div></div></div></foreignObject><text x="260" y="246" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">fork...</text></switch></g></g><g><rect x="684" y="227" width="40" height="40" fill="#dae8fc" stroke="#6c8ebf" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 38px; height: 1px; padding-top: 247px; margin-left: 685px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;"><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><span style="background-color: initial;">devices</span><br /></div></div></div></div></foreignObject><text x="704" y="251" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">device...</text></switch></g></g><g><path d="M 250 427 L 222.24 427" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="stroke"/><path d="M 228.12 423.5 L 221.12 427 L 228.12 430.5" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/></g><g><rect x="250" y="407" width="40" height="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 38px; height: 1px; padding-top: 427px; margin-left: 251px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;"><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div>virtually-dedicated cpu in user-mode</div></div></div></div></foreignObject><text x="270" y="431" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">virtua...</text></switch></g></g><g><path d="M 360 427 L 387.76 427" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="stroke"/><path d="M 381.88 430.5 L 388.88 427 L 381.88 423.5" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/></g><g><rect x="320" y="407" width="40" height="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 38px; height: 1px; padding-top: 427px; margin-left: 321px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;"><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div>virtual memory</div></div></div></div></foreignObject><text x="340" y="431" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">virtua...</text></switch></g></g><g><path d="M 0 327 L 790 327" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/></g><g><rect x="20" y="347" width="80" height="30" fill="none" stroke="none" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 78px; height: 1px; padding-top: 362px; margin-left: 21px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">user space</div></div></div></foreignObject><text x="60" y="366" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">user space</text></switch></g></g><g><rect x="20" y="277" width="80" height="30" fill="none" stroke="none" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; 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