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| 1 | +#!/bin/bash |
| 2 | +set -Eeo pipefail |
| 3 | + |
| 4 | +# shellcheck disable=2154 |
| 5 | +trap 's=$?; echo "$0: Error on line "$LINENO": $BASH_COMMAND"; exit $s' ERR |
| 6 | + |
| 7 | +# Extended regular expression (ERE) for arguments |
| 8 | +reUser='[A-Za-z0-9._][A-Za-z0-9._-]{0,31}' # POSIX.1-2008 |
| 9 | +rePass='[^:]{0,255}' |
| 10 | +reUid='[[:digit:]]*' |
| 11 | +reGid='[[:digit:]]*' |
| 12 | +reDir='[^:]*' |
| 13 | +#reArgs="^($reUser)(:$rePass)(:e)?(:$reUid)?(:$reGid)?(:$reDir)?$" |
| 14 | + |
| 15 | +function log() { |
| 16 | + echo "[$0] $*" |
| 17 | +} |
| 18 | + |
| 19 | +function validateArg() { |
| 20 | + name="$1" |
| 21 | + val="$2" |
| 22 | + re="$3" |
| 23 | + |
| 24 | + if [[ "$val" =~ ^$re$ ]]; then |
| 25 | + return 0 |
| 26 | + else |
| 27 | + log "ERROR: Invalid $name \"$val\", do not match required regex pattern: $re" |
| 28 | + return 1 |
| 29 | + fi |
| 30 | +} |
| 31 | + |
| 32 | +log "Parsing user data: \"$1\"" |
| 33 | +IFS=':' read -ra args <<< "$1" |
| 34 | + |
| 35 | +skipIndex=0 |
| 36 | +chpasswdOptions="" |
| 37 | +useraddOptions=(--no-user-group) |
| 38 | + |
| 39 | +user="${args[0]}"; validateArg "username" "$user" "$reUser" || exit 1 |
| 40 | +pass="${args[1]}"; validateArg "password" "$pass" "$rePass" || exit 1 |
| 41 | + |
| 42 | +if [ "${args[2]}" == "e" ]; then |
| 43 | + chpasswdOptions="-e" |
| 44 | + skipIndex=1 |
| 45 | +fi |
| 46 | + |
| 47 | +uid="${args[$((skipIndex+2))]}"; validateArg "UID" "$uid" "$reUid" || exit 1 |
| 48 | +gid="${args[$((skipIndex+3))]}"; validateArg "GID" "$gid" "$reGid" || exit 1 |
| 49 | +dir="${args[$((skipIndex+4))]}"; validateArg "dirs" "$dir" "$reDir" || exit 1 |
| 50 | + |
| 51 | +if getent passwd "$user" > /dev/null; then |
| 52 | + log "WARNING: User \"$user\" already exists. Skipping." |
| 53 | + exit 0 |
| 54 | +fi |
| 55 | + |
| 56 | +if [ -n "$uid" ]; then |
| 57 | + useraddOptions+=(--non-unique --uid "$uid") |
| 58 | +fi |
| 59 | + |
| 60 | +if [ -n "$gid" ]; then |
| 61 | + if ! getent group "$gid" > /dev/null; then |
| 62 | + groupadd --gid "$gid" "group_$gid" |
| 63 | + fi |
| 64 | + |
| 65 | + useraddOptions+=(--gid "$gid") |
| 66 | +fi |
| 67 | + |
| 68 | +log "useradd ${useraddOptions[@]} $user" |
| 69 | +useradd "${useraddOptions[@]}" "$user" |
| 70 | +mkdir -p "/home/$user" |
| 71 | +chown root:root "/home/$user" |
| 72 | +chmod 755 "/home/$user" |
| 73 | + |
| 74 | +# Retrieving user id to use it in chown commands instead of the user name |
| 75 | +# to avoid problems on alpine when the user name contains a '.' |
| 76 | +uid="$(id -u "$user")" |
| 77 | + |
| 78 | +if [ -n "$pass" ]; then |
| 79 | + echo "$user:$pass" | chpasswd $chpasswdOptions |
| 80 | +else |
| 81 | + usermod -p "*" "$user" # disabled password |
| 82 | +fi |
| 83 | + |
| 84 | +# Add SSH keys to authorized_keys with valid permissions |
| 85 | +if [ -d "/home/$user/.ssh/keys" ]; then |
| 86 | + for publickey in "/home/$user/.ssh/keys"/*; do |
| 87 | + (cat "${publickey}"; echo) >> "/home/$user/.ssh/authorized_keys" |
| 88 | + done |
| 89 | + chown "$uid" "/home/$user/.ssh/authorized_keys" |
| 90 | + chmod 600 "/home/$user/.ssh/authorized_keys" |
| 91 | +fi |
| 92 | + |
| 93 | +# Make sure dirs exists |
| 94 | +if [ -n "$dir" ]; then |
| 95 | + IFS=',' read -ra dirArgs <<< "$dir" |
| 96 | + for dirPath in "${dirArgs[@]}"; do |
| 97 | + dirPath="/home/$user/$dirPath" |
| 98 | + if [ ! -d "$dirPath" ]; then |
| 99 | + log "Creating directory: $dirPath" |
| 100 | + mkdir -p "$dirPath" |
| 101 | + chown -R "$uid:$gid" "$dirPath" |
| 102 | + else |
| 103 | + log "Directory already exists: $dirPath" |
| 104 | + fi |
| 105 | + done |
| 106 | +# if dirs are not specified then create a default data one |
| 107 | +else |
| 108 | + |
| 109 | +fi |
| 110 | + |
| 111 | +###### MODS for shared sftp-data bind mounts ##### |
| 112 | +# mount user dir |
| 113 | +sftpDataPath="/sftp-data" |
| 114 | +userDataDir="$dataPath/users/$user" |
| 115 | +homeDataMount="/home/$user/data" |
| 116 | + |
| 117 | +# always create a data dir by default in the users home. |
| 118 | +if [ ! -d "$homeDataDir" ]; then |
| 119 | + log "- mkdir -p $homeDataDir" |
| 120 | + mkdir -p "$homeDataDir" |
| 121 | + chown -R "$uid:$gid" "$homeDataDir" |
| 122 | +fi |
| 123 | +#mod user so the data dir is their home |
| 124 | +usermod -d /data "$user" |
| 125 | + |
| 126 | +#if the data path has been mapped in as volume then it will exists and do our special logic |
| 127 | +if [ -d "$dataPath" ]; then |
| 128 | + log "- has $dataPath" |
| 129 | + #ensure main dataPath is owned by users (100) group and has good perimssions |
| 130 | + #chown :users "$dataPath" |
| 131 | + #chmod 775 "$dataPath" |
| 132 | + |
| 133 | + if [ ! -d "$userDataDir" ]; then |
| 134 | + log "- mkdir -p $userDataDir" |
| 135 | + mkdir -p "$userDataDir" |
| 136 | + fi |
| 137 | + |
| 138 | + log "- mount --bind $userDataDir $homeDataDir" |
| 139 | + # Remember permissions, you may have to fix them: |
| 140 | + # chown -R :100 "$userDataDir" |
| 141 | + mount --bind "$userDataDir" "$homeDataDir" |
| 142 | + #make sure permissions are good on users dir |
| 143 | + chown -R :users "$userDataDir" |
| 144 | + |
| 145 | + # for users mount the data/users/%u directory |
| 146 | + if [ "$gid" = "100" ]; then |
| 147 | + if [ ! -d "$userDataDir" ]; then |
| 148 | + log "- mkdir -p $userDataDir" |
| 149 | + mkdir -p "$userDataDir" |
| 150 | + fi |
| 151 | + log "- mount --bind $userDataDir $homeDataDir" |
| 152 | + # Remember permissions, you may have to fix them: |
| 153 | + # chown -R :100 "$userDataDir" |
| 154 | + mount --bind "$userDataDir" "$homeDataDir" |
| 155 | + #make sure permissions are good on users dir |
| 156 | + chown -R :users "$userDataDir" |
| 157 | + fi |
| 158 | + # for sudo (27) admins mount the data directory |
| 159 | + if [ "$gid" = "27" ] ; then |
| 160 | + # chown -R :100 "$userDataDir" |
| 161 | + mount --bind "$dataPath" "$homeDataDir" |
| 162 | + #also make sure that sudo admins are assigned to the user group |
| 163 | + usermod -g users "$user" |
| 164 | + usermod -a -G 27 "$user" |
| 165 | + fi |
| 166 | + #chown -R :100 "$dataPath" |
| 167 | + #chmod -R 775 "$dataPath" |
| 168 | +fi |
| 169 | + |
| 170 | +# Source custom scripts, if any |
| 171 | +if [ -x /etc/sftp/user-setup.sh ]; then |
| 172 | + log "Running user-setup.sh ..." |
| 173 | + |
| 174 | + /etc/sftp/user-setup.sh "$user" "$uid" "$gid" |
| 175 | + |
| 176 | +fi |
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