6 ms·

Debugging across pipes and sockets with strace [pdf]

111 points by nh2 9y ago

ktpsns 9y ago
"95% of all computer problems can be solved with strace" -- if you do system/network programming, probably yes, if you want to master Microsoft Word, probably not. Side question: How did the author create the PDF from the markdown source at https://github.com/nh2/strace-pipes-presentation/blob/master/presentation/Debugging%20across%20pipes%20and%20sockets%20with%20strace.md https://github.com/nh2/strace-pipes-presentation/blob/master... ?
- guessmyname 9y ago
  > How did the author create the PDF from the markdown source He used a tool called Marp [1]. At the top of the Markdown file you can see a code that reads "page_number: true" which can be found in the sample file provided by Marp here [2]. There are other tools out there that can be used to convert a Markdown into slides or PDF. I personally use Deckset.app [3] but searching "markdown presentation" — or — "markdown slides" on the Internet seems to bring a long list of projects aiming for the same feature set. [1] https://yhatt.github.io/marp/ https://yhatt.github.io/marp/ [2] https://raw.githubusercontent.com/yhatt/marp/master/example.md https://raw.githubusercontent.com/yhatt/marp/master/example.... [3] https://www.decksetapp.com/2/ https://www.decksetapp.com/2/
  - bringtheaction 9y ago
    > There are other tools out there that can be used to convert a Markdown into slides or PDF For example Pandoc which I personally enjoy
- extrememacaroni 9y ago
  > How did the author create the PDF from the markdown source Not with strace, that's for sure.
- shriek 9y ago
  95% of all documents can be converted with pandoc. But in all seriousness I'm guessing author is using pandoc with syntax highlighting flag. http://pandoc.org/MANUAL.html#syntax-highlighting http://pandoc.org/MANUAL.html#syntax-highlighting
JetSpiegel 9y ago
Markdown versin: https://github.com/nh2/strace-pipes-presentation/blob/master/presentation/Debugging%20across%20pipes%20and%20sockets%20with%20strace.md https://github.com/nh2/strace-pipes-presentation/blob/master...
zevv 9y ago
I made a little tool some time ago to show the relations of processes, fifos, pipes and sockets in a handy picture. This turns out to be very handy when debugging these kind of problems: https://github.com/zevv/lsofgraph https://github.com/zevv/lsofgraph
- chatmasta 9y ago
  That’s very cool, thanks. I’ll be using it. Do you write all your system scripts in Lua? How do you like it?
  - zevv 9y ago
    Usually it's just bash, as long as I don't need any nifty data structures. But keeping track of data in bash is a pita , so that's where Lua comes in for me. I like Lua for how thin and simple it is, with virtually no dependencies on anything. The good thing is that it runs anywhere where I have a C compiler, the bad thing is that it comes with no batteries included - there's not even a native function for creating a directory. I use Lua a lot in my professional work as embedded software engineer, where the main business logic of the apps are written in Lua, with some thin C layers underneath for integration with various libraries and the OS. Still, there are a lot of downsides to Lua, mostly the weak typing that bites me a lot. I'm slowly moving away from Lua to Nim these days, you should check that out if you haven't yet.
- trashcan 9y ago
  This looks cool! I tried to use it, but I don't have "dot". It's kind of hard to search for, can you point me in the right direction?
  - mpweiher 9y ago
    dot - "hierarchical" or layered drawings of directed graphs. This is the default tool to use if edges have directionality. http://www.graphviz.org http://www.graphviz.org

111 points by nh2 9y ago

"95% of all computer problems can be solved with strace" -- if you do system/network programming, probably yes, if you want to master Microsoft Word, probably not. Side question: How did the author create the PDF from the markdown source at https://github.com/nh2/strace-pipes-presentation/blob/master/presentation/Debugging%20across%20pipes%20and%20sockets%20with%20strace.md https://github.com/nh2/strace-pipes-presentation/blob/master... ?

guessmyname 9y ago
> How did the author create the PDF from the markdown source He used a tool called Marp [1]. At the top of the Markdown file you can see a code that reads "page_number: true" which can be found in the sample file provided by Marp here [2]. There are other tools out there that can be used to convert a Markdown into slides or PDF. I personally use Deckset.app [3] but searching "markdown presentation" — or — "markdown slides" on the Internet seems to bring a long list of projects aiming for the same feature set. [1] https://yhatt.github.io/marp/ https://yhatt.github.io/marp/ [2] https://raw.githubusercontent.com/yhatt/marp/master/example.md https://raw.githubusercontent.com/yhatt/marp/master/example.... [3] https://www.decksetapp.com/2/ https://www.decksetapp.com/2/
- bringtheaction 9y ago
  > There are other tools out there that can be used to convert a Markdown into slides or PDF For example Pandoc which I personally enjoy
extrememacaroni 9y ago
> How did the author create the PDF from the markdown source Not with strace, that's for sure.
shriek 9y ago
95% of all documents can be converted with pandoc. But in all seriousness I'm guessing author is using pandoc with syntax highlighting flag. http://pandoc.org/MANUAL.html#syntax-highlighting http://pandoc.org/MANUAL.html#syntax-highlighting

JetSpiegel 9y ago

Markdown versin: https://github.com/nh2/strace-pipes-presentation/blob/master/presentation/Debugging%20across%20pipes%20and%20sockets%20with%20strace.md https://github.com/nh2/strace-pipes-presentation/blob/master...

zevv 9y ago

I made a little tool some time ago to show the relations of processes, fifos, pipes and sockets in a handy picture. This turns out to be very handy when debugging these kind of problems: https://github.com/zevv/lsofgraph https://github.com/zevv/lsofgraph

chatmasta 9y ago
That’s very cool, thanks. I’ll be using it. Do you write all your system scripts in Lua? How do you like it?
- zevv 9y ago
  Usually it's just bash, as long as I don't need any nifty data structures. But keeping track of data in bash is a pita , so that's where Lua comes in for me. I like Lua for how thin and simple it is, with virtually no dependencies on anything. The good thing is that it runs anywhere where I have a C compiler, the bad thing is that it comes with no batteries included - there's not even a native function for creating a directory. I use Lua a lot in my professional work as embedded software engineer, where the main business logic of the apps are written in Lua, with some thin C layers underneath for integration with various libraries and the OS. Still, there are a lot of downsides to Lua, mostly the weak typing that bites me a lot. I'm slowly moving away from Lua to Nim these days, you should check that out if you haven't yet.
trashcan 9y ago
This looks cool! I tried to use it, but I don't have "dot". It's kind of hard to search for, can you point me in the right direction?
- mpweiher 9y ago
  dot - "hierarchical" or layered drawings of directed graphs. This is the default tool to use if edges have directionality. http://www.graphviz.org http://www.graphviz.org