Fix cygwin's GNU screen /tmp/uscreens permission errors

Note: The latest Cygwin release of screen works fine now.

The current (e.g., 4.3.1) GNU screen command generally fails to work correctly on cygwin due to directory permission checks - for example, on /tmp/uscreens. To remedy this problem, you can run mkpasswd / mkgroup for every Windows user that runs cygwin. But this isn't foolproof because /tmp can easily become unusable by screen. Or you can modify screen and avoid the checks entirely. Here's how.

1. Run cygwin's setup program and install:

Source for the screen package
gcc
libncurses-devel

2. After installing, run the cygwin prompt
3. cd /usr/src
4. tar -xzf screen*.gz
5. cd screen-*
6. ./configure
7. Edit Makefile

change the line ETCSCREENRC = to ETCSCREENRC = /etc/screenrc

8. Edit screen.c. See [1] for more details. Remove the statements that start with:

if (((int)st.st_mode & 0777) != n) ...
if ((st.st_mode & 0777) != 0700) ...
if ((int)st.st_uid != real_uid)
if ((int)st.st_uid != multi_uid)

9. make

10. cp screen /bin

[1] https://gist.github.com/pasela/3401354

Comments

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Collecting and graphing metrics via Apache Camel, Statsd, and Graphite

If you're curious about Apache Camel's metrics reporting via Dropwizard, this guide will help you get Graphite running in a Docker container. Then you will run an instrumented Camel application and view its metrics via Graphite's browser UI.

(1) Install Docker

There are many ways to do this depending on your platform. Google it.

(2) Install and run the Docker container for Statsd and Graphite

Refer to https://github.com/hopsoft/docker-graphite-statsd

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Silver City New Mexico November 2017

I don't take enough photos for compelling albums. I was once an amateur photographer with film cameras. Now I respect others’ privacy. I think our society has overdone it since everyone has a camera. Instead, I take mental pictures by talking to the locals in order to understand what I'm seeing in a historical dimension. It took me my whole life so far to see the invisible which is beautiful in its own right.

Photos
The frontier is alive and well in New Mexico. Silver City is where large-scale cattle ranching was attempted, start-up style, in the 19th century by venture capitalists. All of the operations went bankrupt due to drought. This was the approximate location of the television show Bonanza. The place looks exactly the same. Time has stood still.
If you want to buy a ranch, I know a place. It's amazing. But water is a problem.
Silver City is probably the most egalitarian city in the US. Although small, the government obviously has the typical jobs such as judge and p…

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