Cfrtjryk

My binary depends on these boost libraries and respective packages:

NAME                                  |          PACKAGE:

--------------------------------------+-----------------------------------

libboost_serialization.so.1.55.0      |  libboost-serialization1.55.0

libboost_thread.so.1.55.0             |  ibboost-thread1.55.0

libboost_date_time.so.1.55.0          |  libboost-date-time1.55.0

libboost_signals.so.1.55.0            |  libboost-signals1.55.0

So I'd like to define a list of packages:

boostlibnames="libboost-serialization1.55.0 libboost-thread1.55.0 libboost-date-time1.55.0 libboost-signals1.55.0"

And now I'd like to check if they are all installed and only then run actual apt-get install. I know apt will automatically check whether the packages are already installed, but I'd like to place in a prompt to the user whether he wants to install missing libraries before doing so.

So is there a nice way to check whether all listed libraries (in variable as above) are installed?

The dpkg -s command returns the status of installed packages. For example, on my system, if I run it for firefox which is installed and nedit which isn't, I get:

$ dpkg -s firefox

Package: firefox

Status: install ok installed

Priority: optional

Section: web

Installed-Size: 94341

Maintainer: Clement Lefebvre <root@linuxmint.com>

Architecture: amd64

Version: 41.0~linuxmint1+betsy

Replaces: firefox-l10n-af, firefox-l10n-ar, firefox-l10n-be, firefox-l10n-bg, firefox-l10n-bn-bd, firefox-l10n-ca, firefox-l10n-cs, firefox-l10n-da, firefox-l10n-de, firefox-l10n-el, firefox-l10n-en-gb, firefox-l10n-en-us, firefox-l10n-eo, firefox-l10n-es, firefox-l10n-et, firefox-l10n-eu, firefox-l10n-fa, firefox-l10n-fi, firefox-l10n-fr, firefox-l10n-fy, firefox-l10n-gl, firefox-l10n-gu, firefox-l10n-he, firefox-l10n-hi, firefox-l10n-hr, firefox-l10n-hu, firefox-l10n-id, firefox-l10n-is, firefox-l10n-it, firefox-l10n-ja, firefox-l10n-kn, firefox-l10n-ko, firefox-l10n-lt, firefox-l10n-lv, firefox-l10n-nb, firefox-l10n-nl, firefox-l10n-nn, firefox-l10n-pl, firefox-l10n-pt, firefox-l10n-pt-br, firefox-l10n-ro, firefox-l10n-ru, firefox-l10n-sk, firefox-l10n-sl, firefox-l10n-sq, firefox-l10n-sr, firefox-l10n-sv, firefox-l10n-th, firefox-l10n-tr, firefox-l10n-uk, firefox-l10n-zh

Provides: gnome-www-browser, www-browser

Breaks: firefox-l10n-en-us

Description: The Firefox web browser

 The Mozilla Firefox Web Browser.



$ dpkg -s nedit

dpkg-query: package 'nedit' is not installed and no information is available

Use dpkg --info (= dpkg-deb --info) to examine archive files,

and dpkg --contents (= dpkg-deb --contents) to list their contents.

So, you can use that command to check whether a package is installed:

#!/usr/bin/env bash



run_install()

{

    ## Prompt the user 

    read -p "Do you want to install missing libraries? [Y/n]: " answer

    ## Set the default value if no answer was given

    answer=${answer:Y}

    ## If the answer matches y or Y, install

    [[ $answer =~ [Yy] ]] && apt-get install ${boostlibnames[@]}

}



boostlibnames=("libboost-serialization1.55.0" "libboost-thread1.55.0"

                "libboost-date-time1.55.0" "libboost-signals1.55.0" "nedit")

## Run the run_install function if sany of the libraries are missing

dpkg -s "${boostlibnames[@]}" >/dev/null 2>&1 || run_install

I did this function for a CentOS system today.

#!/bin/bash



# List of the packages that should be present

list=("vim-enhanced" "nano" "expect" "dialog" "epel-release" "yum-utils" "bind-utils")



# Check for the existence of the packages in the system and print to file.txt the packages to be installed

check_list=$(rpm -q "${list[@]}" | grep -e "not installed" | awk 'BEGIN { FS = " " } ; { print $2}' > list.txt)



# Check if the list.txt is empty

grep -q '[^[:space:]]' < list.txt

EMPTY_FILE=$?

# If list.txt is empty there's nothing to do

if [[ $EMPTY_FILE -eq 1 ]]; then



echo "Nothing to do"



else



# If list.txt is not empty it installs the packages in list.txt



for PACKAGES in `cat /your/path/list.txt`; do



  yum install -y $PACKAGES



done



fi

Well, i slightly modified the function. Faster and it does not need a loop anymore.

#!/bin/bash





list=("vim-enhanced" "nano" "expect" "dialog" "epel-release" "yum-utils" "bind-utils")

check_list=$(rpm -q "${list[@]}" | grep -e "not installed" | awk 'BEGIN { FS = " " } ; { printf $2" "}' > /your/path/to/list.txt)

install=$(cat /your/path/to/list.txt)



grep -q '[^[:space:]]' < /your/path/to/list.txt



EMPTY_FILE=$?



if [[ $EMPTY_FILE -eq 1 ]]; then



echo "Nothing to do"



else



yum install -y $install



fi

The Debian/Ubuntu counterpart:

apt -qq YOUR_LIST_GOES_HERE | grep -v "installed" | awk -F/ '{print $1}' > /your/path/to/list.txt

packages=$(cat /your/path/to/list.txt)

grep -q '[^[:space:]]' < /your/path/to/list.txt

EMPTY_FILE=$?

if [[ $EMPTY_FILE -eq 1 ]]; then

echo "Nothing to do"

else

apt-get  install -y $packages

fi

The following will give you a list of all relevant packages which aren't installed:

dpkg -l $boostlibnames 2>&1 | awk '{if (/^D|^||^+/) {next} else if(/^dpkg-query:/) { print $6} else if(!/^[hi]i/) {print $2}}' 

This skips dpkg -l's header lines, and then prints out lines where dpkg-query complains about a an unknown package, AND lines not beginning with hi or ii (Hold Inst or Install Inst).

Usually, I'd do something like awk 'NR<=5 {next} ; ...' or sed -e '1,5d' to get rid of dpkg -l's header lines but in this case we're redirecting stderr to stdout in order to catch complaints by dpkg-query as well as dpkg -l's output, so we can't simply delete the first 5 lines.

This will show packages either never installed, removed, purged, or where the install has failed / partially-completed due to error.

#to check package is installed or not without distribution dependency

#!/bin/bash

read -p "Package Name: " pkg

which $pkg > /dev/null 2>&1

if [ $? == 0 ]

then

echo "$pkg is already installed. "

else

read -p "$pkg is not installed. Answer yes/no if want installation_ " request

if  [ $request == "yes" ]

then

yum install $pkg

fi

fi