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#2201 2013-09-16 22:31:25

Procyon
Member
Registered: 2008-05-07
Posts: 1,819

Re: Post your handy self made command line utilities

I was fed up with navigating snownews so I made my own RSS aggregator: rainss, that puts all new entries in one file, opens it in an editor so you can delete lines of entries you don't want to open, and then opens each remaining link in your browser.
It requires community/xml2.
The feed file is ~/.rainss/url and each line should look like: Feedname<TAB (or any whitespace)>URL
All feeds are checked synchronously. New items are stored in ~/.rainss/news (opened automatically), a history is kept in ~/.rainss/history (so old items are not redisplayed).

#! /bin/bash
#Configure:
BROWSER=firefox
EDITOR='vim -c /@@@/'
#EDITOR opens the 'news' file which separates date+title from link with @@@ so this highlights @@@ by searching for it.
#All the lines left after you close the editor get opened in BROWSER, one at a time.

cd ~/.rainss || { echo No '~/.rainss' dir; exit; }
[[ -f url ]] || { echo No url file. Syntax: '"FEEDNAME <TAB> URL"'; exit; }
#FEEDNAME is only used for quicker identification when you open 'news' in your EDITOR.

date=
title=
link=
latest=$(while read feed url; do
	curl -s "$url" | \
	xml2 | \
	grep -o -e 'item/pubDate=.*' -e 'item/title=.*' -e 'item/link=.*' -e 'item/dc:date.*' | \
	while read; do
	#We're only interested in the date, title and link. Once all three are found for an entry, print them.
	if [[ "${REPLY%%=*}" == item/pubDate ]]; then
		date=${REPLY#*=}
	fi
	if [[ "${REPLY%%=*}" == item/dc:date ]]; then
		#RDF format uses dc:date
		date=${REPLY#*=}
	fi
	if [[ "${REPLY%%=*}" == item/title ]]; then
		#In rare cases plaintext titles are supplemented by HTML titles
		title=${title:+$title,}${REPLY#*=}
	fi
	if [[ "${REPLY%%=*}" == item/link ]]; then
		#If a tag is missing, then the link should not be overwritten with a new link, but be printed anyway until you can find out why a tag was missing.
		[[ $link ]] && echo ERROR: duplicate link on feed: $feed: $link >&2
		link=${REPLY#*=}
	fi
	if [[ -n "$date" && -n "$title" && -n "$link" ]]; then
		printf "%s %s【%s】@@@%s\n" "$(date -d "$date" +"%Y-%m-%d %H:%M:%S")" "$feed" "$title" "$link"
		date=
		title=
		link=
	fi
	#Every feed check is backgrounded / synchronized
	done &
done < url)

wait
#The 'history' file keeps all seen links. Only check the URL for changes (the text after @@@). Don't re-report an entry just because the title was changed.
#The 'news' file contains the new entries.
[[ -s history ]] &&
echo "$latest" | grep -Fv "$(sed 's/.*@@@//' history 2>/dev/null)" | tee -a history | tee news >/dev/null ||
echo "$latest" | tee -a history | tee news >/dev/null

#Tell stdout how many items were found and what time it is.
echo -ne "\r$(date): "
wc -l news

#Show today's date as 'TODAY' and yesterday's date as 'YESTERDAY' for easier identification.
sed -i "s/$(date +%Y-%m-%d)/TODAY/; s/$(date +%Y-%m-%d -d yesterday)/YESTERDAY/" news

#Open news in EDITOR so you can choose which items you want to open by deleting the lines of the entries you don't want to open, saving and quitting.
[[ -s news ]] && $EDITOR news
#Open the links to all those entries with BROWSER, one at a time, not too quickly.
[[ -s news ]] && for url in $(sed 's/.*@@@//' news); do $BROWSER "$url"; sleep 0.6; done &>/dev/null

Last edited by Procyon (2013-09-19 16:44:13)

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#2202 2013-09-18 16:06:17

jds1307
Member
Registered: 2007-08-28
Posts: 5

Re: Post your handy self made command line utilities

Good idea.
But the implementation will need some more work.
Running the script for the first time - no existing news and history files - results in empty news and history file.
I am using 'ArchLinux      https://planet.archlinux.org/rss20.xml' as a single entry in ~/.rainss.url.
I was expecting all entries to show up in history and in tne news file.

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#2203 2013-09-18 16:48:32

Procyon
Member
Registered: 2008-05-07
Posts: 1,819

Re: Post your handy self made command line utilities

I suppose that's because grep errors because there is no history file. Does it work the second time you run it now that the history file exists?

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#2204 2013-09-18 18:36:46

jds1307
Member
Registered: 2007-08-28
Posts: 5

Re: Post your handy self made command line utilities

No.
After a second run, both news and history files exist, but are empty.
The problem is with 'grep -Fv ...'. Since the history file is empty, "$(sed 's/.*@@@//' history)" results in the empty string and grep -Fv '' will yield nothing.

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#2205 2013-09-18 18:55:27

jds1307
Member
Registered: 2007-08-28
Posts: 5

Re: Post your handy self made command line utilities

This patch gets me a little further.

--- rainss.orig	2013-09-18 18:15:16.022304312 +0200
+++ rainss	2013-09-18 19:00:45.814189513 +0200
@@ -1,7 +1,10 @@
 #! /bin/bash
+debug=yes
+set -e
 #Configure:
 BROWSER=firefox
-EDITOR='vim -c /@@@/'
+# Use EDITOR from the environment - I am using emacs and dont have vim installed :)
+# EDITOR='vim -c /@@@/'
 #EDITOR opens the 'news' file which separates date+title from link with @@@ so this highlights @@@ by searching for it.
 #All the lines left after you close the editor get opened in BROWSER, one at a time.
 
@@ -35,7 +38,7 @@
 		link=${REPLY#*=}
 	fi
 	if [[ -n "$date" && -n "$title" && -n "$link" ]]; then
-		printf "%s %s【%s】@@@%s\n" "$(date -d "$date" +"%Y-%m-%d %H:%M:%S")" "$feed" "$title" "$link"
+		printf "%s %s[ %s ] @@@%s\n" "$(date -d "$date" +"%Y-%m-%d %H:%M:%S")" "$feed" "$title" "$link"
 		date=
 		title=
 		link=
@@ -47,8 +50,14 @@
 wait
 #The 'history' file keeps all seen links. Only check the URL for changes (the text after @@@). Don't re-report an entry just because the title was changed.
 #The 'news' file contains the new entries.
-echo "$latest" | grep -Fv "$(sed 's/.*@@@//' history)" | tee -a history | tee news >/dev/null
-
+[[ -f history && -n "$(sed -n ' /.*@@@/ {p;q}' history)" ]] &&
+echo "$latest" | grep -Fv "$(sed 's/.*@@@//' history)" | tee -a history | tee news >/dev/null ||
+echo "$latest" | tee -a history | tee news >/dev/null
+news_lines=$(wc -l news | awk '{print $1}')
+hist_lines=$(wc -l history | awk '{print $1}')
+[[ debug ]] && {
+    printf 'News lines: %d - history lines: %d\n' $news_lines $hist_lines
+}
 #Tell stdout how many items where found and what time it is.
 echo -ne "\r$(date): "
 wc -l news
@@ -57,6 +66,7 @@
 sed -i "s/$(date +%Y-%m-%d)/TODAY/; s/$(date +%Y-%m-%d -d yesterday)/YESTERDAY/" news
 
 #Open news in EDITOR so you can choose which items you want to open by deleting the lines of the entries you don't want to open, saving and quitting.
-[[ -s news ]] && $EDITOR news
+(( $news_lines )) && $EDITOR news
 #Open the links to all those entries with BROWSER, one at a time, not too quickly.
-[[ -s news ]] && for url in $(sed 's/.*@@@//' news); do $BROWSER "$url"; sleep 0.6; done &>/dev/null
\ No newline at end of file
+[[ debug ]] && exit 0
+(( $news_lines ))  && for url in $(sed 's/.*@@@//' news); do $BROWSER "$url"; sleep 0.6; done &>/dev/null

Now the initial run stores all items in both news and history.
And a subsequent run sets news to empty when no new items are added, and retains history.

Remains to test if new feeds are added correctly.

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#2206 2013-09-18 19:00:59

jds1307
Member
Registered: 2007-08-28
Posts: 5

Re: Post your handy self made command line utilities

OK
Added 'PlanetDebian   http://planet.debian.org/rss20.xml' to ~/.rainss,and the new Debian entries appear in the news file, and are added to the history file. Seems OK.

Last edited by jds1307 (2013-09-18 19:05:11)

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#2207 2013-09-18 20:32:23

Procyon
Member
Registered: 2008-05-07
Posts: 1,819

Re: Post your handy self made command line utilities

All right, thanks. I updated the above script with the " || echo "$latest" | tee -a history | tee news >/dev/null" line.

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#2208 2013-09-19 13:13:40

jds1307
Member
Registered: 2007-08-28
Posts: 5

Re: Post your handy self made command line utilities

Note that the following 3 lines go together:

+[[ -f history && -n "$(sed -n ' /.*@@@/ {p;q}' history)" ]] &&
+echo "$latest" | grep -Fv "$(sed 's/.*@@@//' history)" | tee -a history | tee news >/dev/null ||
+echo "$latest" | tee -a history | tee news >/dev/null

You left out thefirst line.

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#2209 2013-09-19 16:52:52

Procyon
Member
Registered: 2008-05-07
Posts: 1,819

Re: Post your handy self made command line utilities

I fixed it now and tested it.

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#2210 2013-09-20 09:43:04

bloom
Member
Registered: 2010-08-18
Posts: 749
Website

Re: Post your handy self made command line utilities

dehdr() {
    CFLAGS="-Werror -Wfatal-errors" deheader "$@" | sed -n 's/.*: *remove *\(.*\) *from *\(.*\)/\2: \1/p'
}

In a C project source directory, it will list the unneeded header inclusions (dehdr -r will actually remove the related lines).

It requires deheader and a sensible Makefile.

Last edited by bloom (2013-09-20 09:55:38)


gh · da · ds · cr · ab · fkr

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#2211 2013-09-20 12:30:03

Cloudef
Member
Registered: 2010-10-12
Posts: 636

Re: Post your handy self made command line utilities

bloom wrote:
dehdr() {
    CFLAGS="-Werror -Wfatal-errors" deheader "$@" | sed -n 's/.*: *remove *\(.*\) *from *\(.*\)/\2: \1/p'
}

In a C project source directory, it will list the unneeded header inclusions (dehdr -r will actually remove the related lines).

It requires deheader and a sensible Makefile.

Ooh, nice!

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#2212 2013-09-20 13:17:23

jdarnold
Member
From: Medford MA USA
Registered: 2009-12-15
Posts: 459
Website

Re: Post your handy self made command line utilities

My little alias for using feh to randomly assign a wallpaper (needs to be all on one line):

alias randwp='find /home/jdarnold/data/wallpapers -type f \( -name "*.jpg" -or -name "*.png" -or  -name "*.JPG" \) -print0 | shuf -z -n2 |xargs -0 feh --bg-scale'

I have a dual monitor setup so I grab the first two (-n2).


My tech blog: Daemon Dancing in the Dark
My Arch Linux blog: ArChatter

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#2213 2013-09-20 15:59:10

x33a
Forum Moderator
Registered: 2009-08-15
Posts: 3,349
Website

Re: Post your handy self made command line utilities

@ jdarnold, are the name options necessary? I suppose you only put valid filetypes in the wallpapers directory.

In case you have gifs in there, something like

! -iname "*.gif"

would look cleaner.

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#2214 2013-09-20 18:19:56

Trilby
Forum Moderator
From: Massachusetts, USA
Registered: 2011-11-29
Posts: 13,812
Website

Re: Post your handy self made command line utilities

Or just

find /path/to/imgs -iregex '.*\.\(jpg\|png\)' -print0 ...

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• How's my moderating? Feel free to email any concerns, complaints, or objections.

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#2215 2013-09-20 18:38:27

nfisher.sr
Member
Registered: 2013-06-15
Posts: 38
Website

Re: Post your handy self made command line utilities

Thanks for that Trilby, didn't even know about that usage. And here I thought I knew a bit about "find".

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#2216 2013-09-21 17:01:01

Jeija
Member
Registered: 2013-09-21
Posts: 1

Re: Post your handy self made command line utilities

Persistent installation of Archlinux to a USB Drive - Arch 2 Go
Dependencies: arch-install-scripts
You will need an internet connection.

The following script allows you to easily make a persistent installation of Archlinux on a USB drive.
By default, the script is configured to install the base system with multiple graphics card drivers,
X11, Gnome, Chromium and some more handy tools. You can configure the package selection
and setup as well as other parameters in the "Settings" paragraph.
The script must be run as root. It will display a list of devices and allow you to pick a drive.
It will then continue by partitioning (THIS WILL ERASE ALL YOUR DATA ON THE SELECTED DRIVE), downloading & installing packages, configuring and finally if everything went fine it will ask you to choose a password for the root account and for the user account.
Duration: ~30minutes
You should try different USB drives, some work really fast so that you can't tell difference to an HDD installation, others are just horribly slow, no matter if USB 3.0 or 2.0, fast speed ratings or slow ones.


#!/bin/bash

######################
###### Settings ######
######################
NAME="archusb" # Label as well as hostname
TIMEZONE=/usr/share/zoneinfo/Europe/Berlin
LOCALE="de_DE.UTF-8 UTF-8"
USERNAME="usbuser"
USER_FULLNAME="USB User"

# CHANGE THESE PACKAGES ACCORDING TO YOUR NEEDS
ADD_PACKAGES_XORG="xorg-server xorg-xinit xorg-utils xorg-server-utils"
ADD_PACKAGES_DRIVERS="xf86-input-synaptics"
ADD_PACKAGES_VID="xf86-video-nouveau xf86-video-vesa mesa xf86-video-ati xf86-video-intel xf86-video-nv"
ADD_PACKAGES_ENV="gnome gdm networkmanager"
ADD_PACAKGES_APP="chromium make gedit bash-completion file-roller p7zip openssh"
SUDO_CONFIG="%wheel ALL=(ALL) NOPASSWD: ALL"
enable_desktopmanager="systemctl enable gdm.service" 
enable_networkmanager="systemctl enable NetworkManager.service"

#######################
###### Resources ######
#######################
fstab="# \n
# /etc/fstab: static file system information\n
#\n
# <file system>	<dir>	<type>	<options>	<dump>	<pass>\n
LABEL=$NAME / ext4 rw,relatime,data=ordered 0 1"

archlinuxfr="[archlinuxfr]
Server = http://repo.archlinux.fr/$arch"

ADD_PACKAGES_DEF="base-devel syslinux sudo wget"
PACKAGES="base $ADD_PACKAGES_DEF $ADD_PACKAGES_XORG $ADD_PACKAGES_DRIVERS $ADD_PACKAGES_VID $ADD_PACKAGES_ENV $ADD_PACAKGES_APP"

chr="arch-chroot /mnt "

#########################
###### Preparation ######
#########################

# Abort if not run as root
if [ $(id -u) -ne 0 ]
then
   echo "This script must be run as root. Aborting."
   exit 1
fi

# Show available disks and let the user choose one
fdisk -l
echo "Enter disk /dev/sdX and press [ENTER]: "
read DISK

# Check if user input is sane
if ! [ -b "$DISK" ]
then
	echo "$DISK is no valid block device."
	exit 1
fi

echo "This script will delete everything on $DISK. Are you sure?"
echo "Press [ENTER] to continue or abort with [Ctrl]+[C]"
read -p "$*"

########################
###### Formatting ######
########################

# Unmount and partition the drive
for n in $DISK* ; do umount $n ; done
echo "Partitioning...";
(echo o; echo n; echo p; echo 1; echo ; echo; echo a; echo w) | sudo fdisk $DISK

# Format /dev/sdX1
PARTNUM="1"
PARTITION="$DISK$PARTNUM"
echo "Formatting $PARTITION"
mkfs.ext4 $PARTITION
e2label $PARTITION $NAME

##########################
###### Installation ######
##########################

# Mount /dev/sdX1 at /mnt
umount /mnt
mount $PARTITION /mnt

# Install base system
pacstrap /mnt $PACKAGES

###########################
###### Configuration ######
###########################

# Write /etc/fstab
echo -e $fstab > /mnt/etc/fstab
echo $NAME > /mnt/etc/hostname
sed -i "/${LOCALE}/ s/#*//" /mnt/etc/locale.gen


# Chroot into the system
$chr ln -s $TIMEZONE /etc/localtime
$chr locale-gen
$chr mkinitcpio -p linux
$chr syslinux-install_update -i -a -m
umount /mnt/dev
sed -i "s/APPEND root=.*/APPEND root=LABEL=$NAME rw/g" /mnt/boot/syslinux/syslinux.cfg
$chr $enable_desktopmanager
$chr $enable_networkmanager

####################
###### Yaourt ######
####################

echo $archlinuxfr >> /mnt/etc/pacman.conf
$chr "pacman -S yaourt"

# THE FOLLOWING IS A DEMO ON HOW TO MANUALLY ADD
# COMPILED SOFTWARE TO THE DRIVE
######################
###### DVSwitch ######
######################

#$chr wget http://mesecons.net/dvswitch_bundle.tar.gz -P /opt
#$chr tar -xvf /opt/dvswitch_bundle.tar.gz -C /opt
#$chr /opt/dvswitch_bundle/build.sh
#$chr /opt/dvswitch_bundle/build.sh
#$chr make install -C /opt/dvswitch_bundle/dvswitch/

#############################
###### Users/Passwords ######
#############################
sed -i "/${SUDO_CONFIG}/ s/# *//" /mnt/etc/sudoers
$chr useradd -G "wheel" -m -k /etc/skel $USERNAME
$chr chfn -f "$USER_FULLNAME" $USERNAME
echo "Root Password:"
$chr passwd
echo "User Password:"
$chr passwd $USERNAME

##############################
###### Unmount / Finish ######
##############################
umount /mnt
echo "USB Archlinux Creation script finished."

I hope this works for you and helps you!

Last edited by Jeija (2013-09-21 17:02:24)

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#2217 2013-09-22 12:09:26

invisibleman__
Member
Registered: 2013-08-19
Posts: 9

Re: Post your handy self made command line utilities

YELLOW="\e[0;33m"
WHITE="\e[0;37m"

echo -e "\${YELLOW}_____${WHITE}/"

How can I get this to show a white backslash, yellow underscores, and a white slash?
The backslash before the color keeps screwing up the code...

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#2218 2013-09-22 12:22:26

steve___
Member
Registered: 2008-02-24
Posts: 439

Re: Post your handy self made command line utilities

This works:

b='\\'; echo -e "$b${YELLOW}___$WHITE/"

Last edited by steve___ (2013-09-22 12:23:27)

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#2219 2013-09-22 21:19:32

invisibleman__
Member
Registered: 2013-08-19
Posts: 9

Re: Post your handy self made command line utilities

steve___ wrote:

This works:

b='\\'; echo -e "$b${YELLOW}___$WHITE/"

doing that made this happen :

\e[0;33m____/

all white.

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#2220 2013-09-22 21:30:59

jasonwryan
Forum & Wiki Admin
From: .nz
Registered: 2009-05-09
Posts: 18,814
Website

Re: Post your handy self made command line utilities

yellow=$'\e[0;33m'                                                                                                                            
white=$'\e[0;37m'
end=$'\e[0m'

printf '%s\n' "${white}\\${yellow}_____${white}/${end}"

Arch + dwm   •   Mercurial repos  •   Github

Registered Linux User #482438

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#2221 2013-09-22 21:44:09

invisibleman__
Member
Registered: 2013-08-19
Posts: 9

Re: Post your handy self made command line utilities

Thank you, I got it to work now. Appriciate it.

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#2222 2013-09-23 11:34:25

jdarnold
Member
From: Medford MA USA
Registered: 2009-12-15
Posts: 459
Website

Re: Post your handy self made command line utilities

It's true I could just be more rigorous about what files end up in the wallpapers folder, but sometimes files just show up in there (thanks, Windows). So I figure better safe than sorry. And thanks for the heads up on the -iregex Trilby


My tech blog: Daemon Dancing in the Dark
My Arch Linux blog: ArChatter

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#2223 2013-10-06 18:39:52

graph
Member
Registered: 2010-12-21
Posts: 105

Re: Post your handy self made command line utilities

It could be me getting old, but I never seem to be able to locate rss-feeds on homepages, so I made a script for it:

#!/bin/bash
# Locate rss-feed of blogs/sites
# Usage: rss_finder <url>

#-------------------------------------------------------------------------------
# Variables & arrays
#-------------------------------------------------------------------------------

# Temporary local location of downloaded feed
rss_holder=/tmp/.rss_holder

# Array of feed-names {
feed[0]="feed"
feed[1]="feed.xml"
feed[2]="atom.xml"
feed[3]="rss"
feed[4]="rss.xml"
feed[5]="updates.xml"
# Wordpress
feed[6]="wp-rss.php"
feed[7]="wp-rss2.php"
feed[8]="wp-rdf.php"
feed[9]="wp-atom.php"
# Blogger
feed[10]="feeds/posts"
feed[11]="feeds/posts/default"
#}

check_if_twitter(){
    if [ -n "$(echo "$1" | grep -oE "twitter.com/.*")" ]; then
        # Yep, it's twitter
        # Get twitter name
        twitter_user=$(echo $1 | cut -d/ -f4)

        # Print url
        echo "http://www.twitter-rss.com/user_timeline.php?screen_name=${twitter_user}"
        exit 1
    fi
}

check_for_feed(){
    # See if page exists
    curl -fail -silent "${url}/${1}" > "${rss_holder}"

    # If exit code is 0, page exists
    if [ "$?" = "0" ]; then
        # Check if page is indeed rss/atom feed
        egrep -q "xml|rss version" "${rss_holder}"

        if [ $? = 0 ]; then
            # Is a feed, print url
            echo "${url}/${feed_url}"
            # Set variable to avoid sad error
            feed_found="yes"
        fi
    fi

}
#-------------------------------------------------------------------------------
# Script
#-------------------------------------------------------------------------------

# Print usage if no URL was given
[[ -z "$1" ]] && echo -e "Usage:\t$(basename $0) <url>" && exit 1

# Strip "/" if given url has that at the end
url="$(echo "$1" | sed 's_/$__g')"

# Special function to check for twitter
# (Needs to be before brute-forcing)
check_if_twitter "$1"

# "Bruteforce" rss-location
for feed_url in "${feed[@]}"; do
    # See if page exists
    check_for_feed "${feed_url}"
done

# Print sad error if no feeds where found
if [ -z "${feed_found}" ]; then
    echo "No feeds where found"
    exit 1
else
    rm "${rss_holder}"
    exit 0
fi

Last edited by graph (2013-10-06 18:40:40)

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#2224 2013-10-11 01:50:29

jasonwryan
Forum & Wiki Admin
From: .nz
Registered: 2009-05-09
Posts: 18,814
Website

Re: Post your handy self made command line utilities

One liner to remind yourself which packages you have not voted on in the AUR:

while read -r pkg _; do printf "%s\t" "${pkg}:" && aurvote -c "$pkg"; done < <(pacman -Qm)

Arch + dwm   •   Mercurial repos  •   Github

Registered Linux User #482438

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#2225 2013-10-11 02:47:02

cfr
Member
From: Cymru
Registered: 2011-11-27
Posts: 5,662

Re: Post your handy self made command line utilities

This thread makes me realise just how specific most of my scripts are. I just don't think anybody else would be at all interested.

Don't know if anybody would find this useful:

$ cat bin/antiwordx 
#!/bin/bash -

PATH=/usr/local/bin:/bin:/usr/bin; export PATH
allan=0

for i
do
        j="${i/\.docx/.zip}"
        d="${i/\.docx/}"
        cp -p "$i" "$j"
        if [ $? != 0 ]
        then
                ((allan++))
                continue
        else
                mkdir "$d"
                if [ $? != 0 ]
                then
                        ((allan++))
                        continue
                else
                        unzip -d "$d" "$j" > /dev/null
                        if [ $? != 0 ]
                        then
                                ((allan++))
                                continue
                        else
                                sed 's/<w:p[^>]*>/\n/g' "$d/word/document.xml" | sed -e 's/<[^>]*>//g'  -e '/^$/d' -e 's/$/\n/'
                                if [ $? != 0 ]
                                then
                                        ((allan++))
                                        continue
                                else
                                        rm -r "$d" "$j"
                                        if [ $? != 0 ]
                                        then
                                                ((allan++))
                                                continue
                                        fi
                                fi
                        fi
                fi
        fi
done

exit $allan
# vim: set nospell: 

This was written before OpenOffice could read .docx files and I just desperately needed to be able to read the damn things somehow. It is no prettier than the output of antiword but it is useful for extracting information quickly when that's all that's required.


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