How can I retrieve an entry from /etc/passwd for a given username?

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后悔当初 2020-12-12 08:03

I have the file : /etc/passwd and I have to select from this file the informations about an user that is passed as an argument ( the file contains users and some informatio

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無奈伤痛 (楼主)

2020-12-12 08:27

As this question is tagged bash, I could purpose:

getUserDetails() {
    local dir gid name pass shell uid user
    while IFS=':' read user pass uid gid name dir shell ;do
        [ "$user" = "$1" ] &&
            printf "    %-14s %s\n" User "$user" UID "$uid" GID "$gid" \
                "Full name" "$name" Directory "$dir" "Default shell" "$shell"
    done



or more bash tool oriented:

declare -A UserDetail
getUserDetails() {
    local dir gid name pass shell uid user
    while IFS=':' read user pass uid gid name dir shell ;do
        [ "$user" = "$1" ] && UserDetail=( [user]=$user [name]=$name
                                           [dir]=$dir   [shell]=$shell
                                           [UID]=$uid   [GID]=$gid )
    done 


This way is very efficient, it set a global variable without forks.