autouser/autouser.sh

#!/bin/bash

FILE="${@: -1}"
if [[ ! -f "$FILE" ]]; then
  echo "File \"$FILE\" doesn't exist!"
  exit
fi

DRYRUN=false
FILE_CONTENTS="$(cat ${@: -1})"
CREATE_USERS=false
DELETE_USERS=false
CREATE_GROUPS=false
DELETE_GROUPS=false
DELIM=";"

usage ()
{
  echo "Usage: ./autouser.sh \$PARAMETER file.csv"
  echo ""
  echo "PARAMETERS"
  echo "    --help || -h (Show this help prompt)"
  echo "    --dry-run (Test without executing any changes)"
  echo "    --create-users users.csv (Create users from a .csv file)"
  echo "    --create-groups groups.csv (Create groups from a .csv file)"
  echo "    --delete-users users.csv (Delete users from a .csv file)"
  echo "    --delete-groups groups.csv (Delete groups from a .csv file)"
  exit
}

rootCheck ()
{
  if [[ "$(id -u)" -ne 0 ]]; then
    echo "You must be root to run this parameter"
    exit
  fi
}

cutter ()
{
  echo "$1" | cut -d "$DELIM" -f "$2"
}

turnLowercase() {
  echo "$1" | tr "[:upper:]" "[:lower:]" | sed 's/ñ/n/g'
}

createGroups ()
{
  while read line; do
    GID=$(cutter "${line}" "2")
    GROUPNAME=$(turnLowercase $(cutter "${line}" "1"))
      if [[ -z "$GID" ]]; then
        echo "[+] Adding group $GROUPNAME..."
        groupadd $GROUPNAME
      else
        echo "[+] Adding group $GROUPNAME..."
        groupadd $GROUPNAME -g $GID
      fi
  done <<< "$FILE_CONTENTS"
}

createGroupsDry ()
{
  while read line; do
    GID=$(cutter "${line}" "2")
    GROUPNAME=$(turnLowercase $(cutter "${line}" "1"))
       if [[ -z "$GID" ]]; then
           echo "groupadd $GROUPNAME"
       else
           echo "groupadd $GROUPNAME -g $GID"
       fi
  done <<< "$FILE_CONTENTS"
}

deleteGroups ()
{
  while read line; do
    GROUPNAME=$(turnLowercase $(cutter "${line}" "1"))
    echo "[+] Deleting group $GROUPNAME..."
    groupdel $GROUPNAME
  done <<< "$FILE_CONTENTS"
}

deleteGroupsDry ()
{
  while read line; do
    GROUPNAME=$(turnLowercase $(cutter "${line}" "1"))
    echo "groupdel $GROUPNAME"
  done <<< "$FILE_CONTENTS"
}

createUsers ()
{
  while read line; do
    USERNAME=$(turnLowercase $(cutter "${line}" "1"))
    FULLNAME=$(cutter "${line}" "2")
    USERUID=$(cutter "${line}" "3")
    USERGID=$(turnLowercase $(cutter "${line}" "4"))
    USERGROUPS=$(turnLowercase $(cutter "${line}" "5"))
    TLFN=$(cutter "${line}" "6")
    EXTRAINFO=$(cutter "${line}" "7")
    USERSHELL=$(cutter "${line}" "8")
    USERLOCKED=$(cutter "${line}" "9")

    echo "[+] Adding user $USERNAME..."
    useradd -m $USERNAME
    echo $USERNAME:$USERNAME | chpasswd

    if [[ ! -z "$FULLNAME" ]]; then
      chfn -f "$FULLNAME" "$USERNAME" 1>/dev/null
    fi

    if [[ ! -z "$USERUID" ]]; then
      usermod -u $USERUID $USERNAME
    fi

    if [[ ! -z "$USERGID" ]]; then
      usermod -g $USERGID $USERNAME
    fi
    
    if [[ ! -z "$USERGROUPS" ]]; then
      usermod -G $(echo $USERGROUPS | tr "|" ",") $USERNAME
    fi
    
    if [[ ! -z "$TLFN" ]]; then
      chfn -p "$TLFN" $USERNAME 1>/dev/null
    fi
    
    if [[ ! -z "$EXTRAINFO" ]]; then
      chfn -o "$EXTRAINFO" $USERNAME 1>/dev/null
    fi

    if [[ ! -z "$USERSHELL" ]]; then
      usermod -s $USERSHELL $USERNAME
    else
      usermod -s /bin/bash $USERNAME
    fi

    if [[ $USERLOCKED == "SI" ]]; then
      usermod -L $USERNAME
    fi
  done <<< "$FILE_CONTENTS"
}

createUsersDry ()
{
  while read line; do
    USERNAME=$(turnLowercase $(cutter "${line}" "1"))
    FULLNAME=$(cutter "${line}" "2")
    USERUID=$(cutter "${line}" "3")
    USERGID=$(turnLowercase $(cutter "${line}" "4"))
    USERGROUPS=$(turnLowercase $(cutter "${line}" "5"))
    TLFN=$(cutter "${line}" "6")
    EXTRAINFO=$(cutter "${line}" "7")
    USERSHELL=$(cutter "${line}" "8")
    USERLOCKED=$(cutter "${line}" "9")

    echo "useradd -m $USERNAME"
    echo "echo \"$USERNAME:$USERNAME | chpasswd\""

    if [[ ! -z "$FULLNAME" ]]; then
      echo "chfn -f \"$FULLNAME\" $USERNAME"
    fi

    if [[ ! -z "$USERUID" ]]; then
      echo "usermod -u $USERUID $USERNAME"
    fi

    if [[ ! -z "$USERGID" ]]; then
      echo "usermod -g $USERGID $USERNAME"
    fi

    if [[ ! -z "$USERGROUPS" ]]; then
      echo "usermod -G $(echo $USERGROUPS | tr "|" ",") $USERNAME"
    fi

    if [[ ! -z "$TLFN" ]]; then
      echo "chfn -p \"$TLFN\" $USERNAME"
    fi

    if [[ ! -z "$EXTRAINFO" ]]; then
      echo "usermod -c \"$EXTRAINFO\" $USERNAME"
    fi

    if [[ ! -z "$USERSHELL" ]]; then
      echo "usermod -s $USERSHELL $USERNAME"
    else
      echo "usermod -s /bin/bash $USERNAME"
    fi

    if [[ $USERLOCKED == "SI" ]]; then
      echo "usermod -L $USERNAME"
    fi
  done <<< "$FILE_CONTENTS"
}

deleteUsers ()
{
  while read line; do
    USERNAME=$(turnLowercase $(cutter "${line}" "1"))
    echo "[+] Deleting user $USERNAME..."
    userdel -r $USERNAME 2>/dev/null
    groupdel $USERNAME 2>/dev/null
  done <<< "$FILE_CONTENTS"
}

deleteUsersDry ()
{
  while read line; do
    USERNAME=$(turnLowercase $(cutter "${line}" "1"))
    echo "userdel -r $USERNAME"
    echo "groupdel $USERNAME"
  done <<< "$FILE_CONTENTS"
}


for arg in "$@"
do
  if [[ "$arg" == "-h" || "$arg" == "--help" ]]; then
    usage
  fi
  if [[ "$arg" == "--dry-run" ]]; then
    DRYRUN=true
  fi
  if [[ "$arg" == "--create-groups" ]]; then
    CREATE_GROUPS=true
  fi
  if [[ "$arg" == "--delete-groups" ]]; then
    DELETE_GROUPS=true
  fi
  if [[ "$arg" == "--create-users" ]]; then
    CREATE_USERS=true
  fi
  if [[ "$arg" == "--delete-users" ]]; then
    DELETE_USERS=true
  fi
done

if [[ -z "$1" ]]; then
  usage
fi

if [[ "$CREATE_GROUPS" == true ]]; then
  if [[ "$DRYRUN" == true ]]; then
    createGroupsDry
  else
    rootCheck
    createGroups
  fi
  exit
fi

if [[ "$DELETE_GROUPS" == true ]]; then
  if [[ "$DRYRUN" == true ]]; then
    deleteGroupsDry
  else
    rootCheck
    deleteGroups
  fi
  exit
fi

if [[ "$CREATE_USERS" == true ]]; then
  if [[ "$DRYRUN" == true ]]; then
    createUsersDry
  else
    rootCheck
    createUsers
  fi
  exit
fi

if [[ "$DELETE_USERS" == true ]]; then
  if [[ "$DRYRUN" == true ]]; then
    deleteUsersDry
  else
    rootCheck
    deleteUsers
  fi
  exit
fi