Tag: Shell

Skip unreadable files in awk scripts

Have you ever needed to give awk multiple files to process, but wanted it to skip files that it can’t open? Use this snippet!

BEGINFILE {
    # skip files that cannot be opened
    if ( ERRNO != "" ) {
        nextfile
    }
}

This trick is mentioned in the documentation for the BEGINFILE pattern, but not spelled out as code. You’re welcome. 😀

Unsafe Chrome Sometimes Necessary

In my work – every now and then – I found myself in need of a browser with reduced security checks (mainly to gloss over cross domain XMLHttpRequests and SSL certificate violations) for testing purposes. I didn’t want to take the risk and use my main browser session with these settings, so I made me a script (also available as a Gist). 🙂

#
# Author: Riyad Preukschas <riyad@informatik.uni-bremen.de>
# License: Mozilla Public License 2.0
#
# Loads an unsafe (i.e. with several security features disabled) instance of
# Chrome with a temporary profile (i.e. all data is lost once Chrome is closed)
chrome-unsafe() {
# for Homebrew Cask (see http://caskroom.io/) compatibility
local -a CHROME_PATHS
CHROME_PATHS=( \
"/opt/homebrew-cask/Caskroom/google-chrome-dev/latest/Google Chrome.app/Contents/MacOS/Google Chrome" \
"/opt/homebrew-cask/Caskroom/google-chrome/latest/Google Chrome.app/Contents/MacOS/Google Chrome" \
"/Applications/Google Chrome.app/Contents/MacOS/Google Chrome" \
"chrome" \
"chromium" \
)
local CHROME="${CHROME_PATHS[1]}"
while [[ -n CHROME_PATHS ]] && ! type ${CHROME} > /dev/null; do
shift CHROME_PATHS
CHROME="${CHROME_PATHS[1]}"
done
local DATA_DIR="$(mktemp -d -t 'chrome-unsafe_data_dir.XXXXXXXXXX')"
# for a listing of command line switches see:
# https://peter.sh/experiments/chromium-command-line-switches/
"${CHROME}" \
--disable-bundled-ppapi-flash \
--disable-popup-blocking \
--disable-sync \
--disable-web-security \
--ignore-certificate-errors \
--no-default-browser-check \
--no-first-run \
--non-secure \
--user-data-dir="${DATA_DIR}" \
$@ >/dev/null 2>&1 &!
# for now the window will not be brought to the front
}
view raw chrome-unsafe.plugin.zsh hosted with ❤ by GitHub

Tip:
If you use oh my ZSH you can save this file in 

~/.oh-my-zsh/custom/plugins/chrome-unsafe/chrome-unsafe.plugin.zsh

and add “chrome-unsafe” to your list of used plugins in 

~/.zshrc