I need to download chart data from poloniex rest client with multiple options using bash only. I tried getopts but couldn’t really find a way to use mutliple options with multiple parameters. here is what I want to achieve having the arguments I need to call wget for c x p times well I am explicitly wri…
Tag: macos
How to pick a free port for a subprocess?
I am writing a Python wrapper around Appium server. Appium accepts command-line parameter for a local port to bind to. Unfortunately, Appium cannot autoselect a free port for itself, so it either binds to explicitly specified port, or fails with EADDRINUSE. Even when telling it to bind to port 0, it will star…
Linux layer on macOS [closed]
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Dynamically pick the user GUI and UID who’s running Docker at the host from entrypoint
I have the following script as the ENTRYPOINT of my Dockerfile and therefore Docker image: Everything is running fine for Linux since the GUI and UID for most of the distros is 1000 (we’re using Fedora and Ubuntu). Windows – I think – doesn’t care about it, but again the script works p…
pthread mutex does not work correctly on macOS
Currently I am learning POSIX threads on Linux. The following example is counting how many 3(int) there are in an integer array, which returns a correct answer on CentOS 6.5 but a wrong one on macOS 10.12.4. The answer should be 64 * 1024 * 1024 / 2 = 67,108,864 / 2 = 33,554,432. But the answer on macOS is
Sed: select first part of price
Seems that my sed command is not working. I am trying to select the 2 in $2.99. However, no matter how I seem to type the regex, it will only give the .99 I want to select everything (every number) that is not the dollar sign up to the period. Any suggestions? echo “$2.99” | sed -e ‘s:^([^\$…
How does Docker run a Linux kernel under macOS host?
I installed Docker on my macOS Sierra as follows. Note I don’t have VirtualBox installed. My macOS details. Once I run Docker from launchpad, I am able to run Docker containers. My question is how does Docker manage to run a Linux kernel within macOS? I thought Docker would at least require boot2docker …
Integrate ffmpeg to unity via plugin OS X and Linux
I need to use a ffmpeg wrapper (so we can use it in unity) for a lecture. Unfortunately the teachers only provide a solution to do this for Windows. They are referring to https://github.com/Ruslan-B/FFmpeg.AutoGen which we should use to generate a wrapper for our OS. That’s where my problems begin: I ha…
Quote a filename containing quotes and given as variable in Bash
Let’s say I have a directory path in variable DIR and I want to list this directory. If I care only about spaces in the path, then I could do What should I write if I want to support also single and double quotes and other weird stuff in the directory path? Example: Answer Quotes are not just for spaces
df –total command for mac?
I want to use command line to retrieve the total disk space on a machine as one value. On most Linux machines, the “df –total” returns such a value at the end of the regular df output. On osx9, 10, 11, and 12, there seems to be no option like this. Same issue with older linux os, redhat5, ce…