process.argv() পদ্ধতিটি ব্যবহারকারীর পরিবেশ অবজেক্ট পাওয়ার জন্য ব্যবহার করা হয়। এই বস্তুটি পরিবেশ সম্পর্কে সমস্ত তথ্য ধারণ করবে যেখানে এই কমান্ডটি কার্যকর করা হচ্ছে৷
সিনট্যাক্স
process.env()
পরামিতি
যেহেতু এটি ব্যবহারকারীর পরিবেশের জন্য একটি বস্তু ফেরত দেয়। এর জন্য ব্যবহারকারীর কাছ থেকে কোনো ইনপুট লাগবে না।
উদাহরণ
নাম দিয়ে একটি ফাইল তৈরি করুন – env.js এবং নিচের কোড স্নিপেটটি কপি করুন। ফাইল তৈরি করার পরে, নীচের উদাহরণে দেখানো এই কোডটি চালানোর জন্য নিম্নলিখিত কমান্ডটি ব্যবহার করুন −
node env.js
env.js
// Node.js program to demonstrate the use of process.env
// Importing the process module
const process = require('process');
// Printing the user environment object
console.log(process.env); আউটপুট
admin@root:~/node/test$ node env.js
{ SHELL: '/bin/bash',
SESSION_MANAGER:
'local/admin:@/tmp/.ICE-unix/2956,unix/admin:/tmp/.ICE-unix/2956',
QT_ACCESSIBILITY: '1',
COLORTERM: 'truecolor',
XDG_CONFIG_DIRS: '/etc/xdg/xdg-ubuntu:/etc/xdg',
XDG_MENU_PREFIX: 'gnome-',
GNOME_DESKTOP_SESSION_ID: 'this-is-deprecated',
LANGUAGE: 'en_IN:en',
GNOME_SHELL_SESSION_MODE: 'ubuntu',
SSH_AUTH_SOCK: '/run/user/1001/keyring/ssh',
XMODIFIERS: '@im=ibus',
DESKTOP_SESSION: 'ubuntu',
SSH_AGENT_PID: '2912',
GTK_MODULES: 'gail:atk-bridge',
PWD: '/home/admin/test',
LOGNAME: 'admin',
XDG_SESSION_DESKTOP: 'ubuntu',
XDG_SESSION_TYPE: 'x11',
GPG_AGENT_INFO: '/run/user/1001/gnupg/S.gpg-agent:0:1',
XAUTHORITY: '/run/user/1001/gdm/Xauthority',
GJS_DEBUG_TOPICS: 'JS ERROR;JS LOG',
WINDOWPATH: '2',
HOME: '/home/admin',
USERNAME: 'admin',
IM_CONFIG_PHASE: '1',
LANG: 'en_IN',
LS_COLORS:
'rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31
;01:mi=00:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz
=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tl
z=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=0
1;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.zst=01;31:*.tzst=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01
;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=
01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.cab
=01;31:*.wim=01;31:*.swm=01;31:*.dwm=01;31:*.esd=01;31:*.jpg=01;35:*.jpeg=01;35:*.mjpg=01
;35:*.mjpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:
*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=0
1;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=0
1;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:
*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35
:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.ogv=01;
35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi=00;36:*.mk
a=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.oga=00;36:*.opus=00;
36:*.spx=00;36:*.xspf=00;36:',
XDG_CURRENT_DESKTOP: 'ubuntu:GNOME',
VTE_VERSION: '6003',
GNOME_TERMINAL_SCREEN:
'/org/gnome/Terminal/screen/82170ab9_b5b3_424d_b0ce_37a40eb4e264',
INVOCATION_ID: '9f9745f4c0c546eaa78b2c84f6d7ae59',
MANAGERPID: '2722',
GJS_DEBUG_Output: 'stderr',
LESSCLOSE: '/usr/bin/lesspipe %s %s',
XDG_SESSION_CLASS: 'user',
TERM: 'xterm-256color',
LESSOPEN: '– /usr/bin/lesspipe %s',
USER: 'admin',
GNOME_TERMINAL_SERVICE: ':1.111',
DISPLAY: ':0',
SHLVL: '1',
QT_IM_MODULE: 'ibus',
XDG_RUNTIME_DIR: '/run/user/1001',
JOURNAL_STREAM: '9:66796',
XDG_DATA_DIRS:
'/usr/share/ubuntu:/usr/local/share/:/usr/share/:/var/lib/snapd/desktop',
PATH:
'/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin',
GDMSESSION: 'ubuntu',
DBUS_SESSION_BUS_ADDRESS: 'unix:path=/run/user/1001/bus',
_: '/usr/bin/node',
OLDPWD: '/home/admin' } উদাহরণ
আসুন আরও একটি উদাহরণ দেখি।
// Node.js program to demonstrate the use of process.env
// Importing the process module
const process = require('process');
// Printing object for process.env
var no_env = 0;
// Calling the process.env function
var env = process.env;
// Traversing through the returned data
for (var key in env) {
// Printing values
console.log(key + ":\t\t\t" + env[key]);
no_env++;
}
// Printing total count
console.log("total no of values available = " + no_env);
// Accessing fields one by one
console.log("operating system: " + env['OS']);
console.log("alluserprofile: " + env['ALLUSERSPROFILE']);
console.log("public directory: " + env['PUBLIC']); আউটপুট
admin@root:~/node/test$ node env.js SHELL: /bin/bash SESSION_MANAGER: local/admin:@/tmp/.ICEunix/2956,unix/admin:/tmp/.ICE-unix/2956 QT_ACCESSIBILITY: 1 COLORTERM: truecolor XDG_CONFIG_DIRS: /etc/xdg/xdg-ubuntu:/etc/xdg XDG_MENU_PREFIX: gnomeGNOME_DESKTOP_SESSION_ID: this-is-deprecated LANGUAGE: en_IN:en GNOME_SHELL_SESSION_MODE: ubuntu SSH_AUTH_SOCK: /run/user/1001/keyring/ssh XMODIFIERS: @im=ibus DESKTOP_SESSION: ubuntu SSH_AGENT_PID: 2912 GTK_MODULES: gail:atk-bridge PWD: /home/admin/test LOGNAME: admin XDG_SESSION_DESKTOP: ubuntu XDG_SESSION_TYPE: x11 GPG_AGENT_INFO: /run/user/1001/gnupg/S.gpg-agent:0:1 XAUTHORITY: /run/user/1001/gdm/Xauthority GJS_DEBUG_TOPICS: JS ERROR;JS LOG WINDOWPATH: 2 HOME: /home/admin USERNAME: admin IM_CONFIG_PHASE: 1 LANG: en_IN LS_COLORS: rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or =40;31;01:mi=00:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01; 31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=0 1;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.dz=01;31:*.gz=01;3 1:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.zst=01;31:*.tzst=01;31:*.bz2=01;31:*.bz=01;31: *.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01; 31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01 ;31:*.cab=01;31:*.wim=01;31:*.swm=01;31:*.dwm=01;31:*.esd=01;31:*.jpg=01;35:*.jpeg=01;35:* .mjpg=01;35:*.mjpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.t ga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;3 5:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35: *.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.n uv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:* .flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35: *.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi= 00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.oga=00;36: *.opus=00;36:*.spx=00;36:*.xspf=00;36: XDG_CURRENT_DESKTOP: ubuntu:GNOME VTE_VERSION: 6003 GNOME_TERMINAL_SCREEN: /org/gnome/Terminal/screen/82170ab9_b5b3_424d_b0ce_37a40eb4e264 INVOCATION_ID: 9f9745f4c0c546eaa78b2c84f6d7ae59 MANAGERPID: 2722 GJS_DEBUG_Output: stderr LESSCLOSE: /usr/bin/lesspipe %s %s XDG_SESSION_CLASS: user TERM: xterm-256color LESSOPEN: – /usr/bin/lesspipe %s USER: admin GNOME_TERMINAL_SERVICE: :1.111 DISPLAY: :0 SHLVL: 1 QT_IM_MODULE: ibus XDG_RUNTIME_DIR: /run/user/1001 JOURNAL_STREAM: 9:66796 XDG_DATA_DIRS: /usr/share/ubuntu:/usr/local/share/:/usr/share/:/var/lib/snapd/desktop PATH: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/ bin GDMSESSION: ubuntu DBUS_SESSION_BUS_ADDRESS: unix:path=/run/user/1001/bus _: /usr/bin/node OLDPWD: /home/admin total no of values available = 50 operating system: undefined alluserprofile: undefined public directory: undefined
