Denis overplumbum

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rcrowley / bad-side-effects-on-mac-osx.sh

Last active August 29, 2015 13:56

A protip for authors of shell programs. I use this pattern *all the time* for working in a temporary directory and cleaning it up after I'm done but a quirk in how shells interpret failures in command substitution caused a program like these to remove my coworker's home directory when he ran said program on Mac OS X, which doesn't have `mktemp -d`.

	set -e

	# Looks clever, is short, but removes your working directory on Mac OS X
	# where `mktemp -d` fails.
	cd "$(mktemp -d)"
	trap "rm -rf \"$PWD\"" EXIT INT QUIT TERM

	# ...

overplumbum / lxc-shm-fix.sh

Created November 16, 2012 15:23

Permament fix for /run/shm creation in Ubuntu LXC guest systems (oneiric..precise)

	#!/bin/bash
	# https://bugs.launchpad.net/launchpad/+bug/974584

	# common oneiric-lxc-guest bug
	grep --silent "/run/shm" /lib/init/fstab \|\| echo "none /run/shm tmpfs nosuid,nodev 0 0" >> /lib/init/fstab
	mkdir -p /run/shm
	mount /run/shm

	# required for systems after manual dirty fixing
	test -L /dev/shm \|\| ( umount /dev/shm ; rm -fr /dev/shm && ln -s /run/shm /dev/ )

overplumbum / video-from-frames.sh

Last active September 27, 2015 04:08

Video clip from frames generation

	## Windows: http://en.cze.cz/Images-to-video
	## MacOSX & Linux below

	clipdir=/tmp/clip/

	rm -fr $clipdir && mkdir $clipdir

	# crop&resize 3x4 frames to 16x9 1280x720
	for i in *.JPG ; do convert -verbose $i -strip -resample 72x72 -crop x1386+0+100 -resize 1280x $clipdir/$i ; done
	#:> cmds.lst && for i in *.JPG ; do echo convert -verbose $i -strip -resample 72x72 -crop x1386+0+100 -resize 1280x $clipdir/$i >> cmds.lst ; done