Go here for updated versions: https://github.com/atmoz/bin/blob/master/passmenu

i3config_example

# ...

# assuming $mod and $dmenuOptions are set

set $passMenu "pass: [p]assword [l]ogin [b]rowse"
bindsym $mod+p mode $passMenu
mode $passMenu {
    bindsym p exec --no-startup-id ~/bin/passmenu --type -- $dmenuOptions; mode "default"
    bindsym l exec --no-startup-id ~/bin/passmenu --type --get username:password --enter -- $dmenuOptions; mode "default"
    bindsym b exec --no-startup-id ~/bin/passmenu --type --browse -- $dmenuOptions; mode "default"

    bindsym Return mode "default"
    bindsym Escape mode "default"
}

# ...

modified-passmenu-readme

This code will not be updated. Use this instead: https://github.com/atmoz/bin/blob/master/passmenu

passmenu

#!/usr/bin/env bash
# No longer updated. Download newest here:
# https://github.com/atmoz/bin/blob/master/passmenu

shopt -s nullglob globstar

#####################################################################
# Parse arguments
#####################################################################

clipTime=45
typeit=0
typeDelay=30
enter=0
tab=1
browse=0
xclipArgs="-selection clipboard"
declare -a get=("password")

while [ -n "$1" ]; do
    case "$1" in
        --get) IFS=':' read -a get <<< "$2"; shift 2 ;;
        --browse) browse=1; shift ;;
        --type) typeit=1; shift ;;
        --enter) enter=1; shift ;;
        --no-tab) tab=0; shift ;;
        --delay) typeDelay="$2"; shift 2;;
        --xclip-args) xclipArgs="$2"; shift 2;;
        --) shift; break ;;
        *) break ;;
    esac
done

#####################################################################
# Helper functions
#####################################################################

function findPasswordFiles() {
    prefix=${PASSWORD_STORE_DIR-~/.password-store}
    password_files=( "$prefix"/**/*.gpg )
    password_files=( "${password_files[@]#"$prefix"/}" )
    password_files=( "${password_files[@]%.gpg}" )

    printf '%s\n' "${password_files[@]}"
}

function getKeys() {
    # 1. Replace password value with key
    # 2. Remove invalid lines
    # 3. Remove values
    echo "$@" | sed \
        -e '1c\password' \
        -e '/^[^:]*\:.*$/!d' \
        -e 's/^\([^:]*\)\:.*$/\1/'
}

function getValue() {
    if [[ "$1" == "password" ]]; then
        echo "$2" | { IFS= read -r pass; printf %s "$pass"; }
    else
        echo "$2" | sed -n "s/^$1\:[[:blank:]]*\(.*\)$/\1/p"
    fi
}

function typeText() {
    echo -n "$@" | xdotool type --clearmodifiers --delay $typeDelay --file -
}

function typeEnter() {
    xdotool key --delay $typeDelay Return
}

function typeTab() {
    xdotool key --delay $typeDelay Tab
}

function clipboard() {
    string="$@"
    oldClip="$(xclip $xclipArgs -o 2>/dev/null)"
    echo -n "$string" | xclip $xclipArgs
    {
        sleep $clipTime
        if [ "$(xclip $xclipArgs -o 2>/dev/null)" == "$string" ]; then
            echo -n "$oldClip" | xclip $xclipArgs
        fi
    } &
}

#####################################################################
# Select and unlock password file
#####################################################################

password=$(findPasswordFiles | dmenu "$@")
[[ -n $password ]] || exit

lines="$(pass show "$password" 2>/dev/null)"

#####################################################################
# Browse custom values with dmenu
#####################################################################

if [[ $browse -eq 1 ]]; then
    keys="$(getKeys "$lines")"
    key="password"
    values=""

    if [[ $typeit -eq 0 ]]; then
        prompt="Copy to clipboard: "
    else
        prompt="Write to focused input: "
    fi

    while true; do
        key="$(echo -e "$keys" | IFS=$'\n' dmenu "$@" -p "$prompt")"

        [[ -n "$key" ]] || break
        [[ -n "$value" ]] && values="$values"$'\n'

        value="$(getValue "$key" "$lines")"
        if [[ $typeit -eq 1 ]]; then
            typeText "$value"
            if [[ $tab -eq 1 ]]; then
                typeTab
            fi
        else
            prompt="$prompt $key"
            values="$values$value"
        fi
    done

    if [[ $typeit -eq 0 ]]; then
        clipboard "$values"
    fi

#####################################################################
# Get password and/or custom values with arguments
#####################################################################

else
    values=""

    for key in "${get[@]}"; do
        if [ "$key" == "password" ]; then
            value="$(echo "$lines" | head -n1 )"
        else
            value="$(getValue "$key" "$lines")"
        fi

        [[ -n "$values" ]] && values="$values"$'\n'
        values="$values$value"
    done

    if [[ $typeit -eq 0 ]]; then
        clipboard "$values"
    else
        vc=0 # value counter
        while IFS=$'\n' read -r value || [[ -n "$value" ]]; do
            let "vc++"
            if [[ $vc -gt 1 && $tab -eq 1 ]]; then
                typeTab
            fi
            typeText "$value"
        done <<< $values

        if [[ $enter -eq 1 ]]; then
            typeEnter
        fi
    fi
fi