usr.sbin/adduser/adduser.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2002-2004 Michael Telahun Makonnen. All rights reserved.
   4 #
   5 # Redistribution and use in source and binary forms, with or without
   6 # modification, are permitted provided that the following conditions
   7 # are met:
   8 # 1. Redistributions of source code must retain the above copyright
   9 #    notice, this list of conditions and the following disclaimer.
  10 # 2. Redistributions in binary form must reproduce the above copyright
  11 #    notice, this list of conditions and the following disclaimer in the
  12 #    documentation and/or other materials provided with the distribution.
  13 #
  14 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  15 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  18 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24 #
  25 #       Email: Mike Makonnen <mtm@FreeBSD.Org>
  26 #
  27 # $FreeBSD: src/usr.sbin/adduser/adduser.sh,v 1.33 2010/01/14 22:04:08 joel Exp $
  28 #
  29
  30 # err msg
  31 #       Display $msg on stderr, unless we're being quiet.
  32 #
  33 err() {
  34         if [ -z "$quietflag" ]; then
  35                 echo 1>&2 ${THISCMD}: ERROR: $*
  36         fi
  37 }
  38
  39 # info msg
  40 #       Display $msg on stdout, unless we're being quiet.
  41 #
  42 info() {
  43         if [ -z "$quietflag" ]; then
  44                 echo ${THISCMD}: INFO: $*
  45         fi
  46 }
  47
  48 # get_nextuid
  49 #       Output the value of $_uid if it is available for use. If it
  50 #       is not, output the value of the next higher uid that is available.
  51 #       If a uid is not specified, output the first available uid, as indicated
  52 #       by pw(8).
  53 #
  54 get_nextuid () {
  55         _uid=$1
  56         _nextuid=
  57
  58         if [ -z "$_uid" ]; then
  59                 _nextuid="`${PWCMD} usernext | cut -f1 -d:`"
  60         else
  61                 while : ; do
  62                         ${PWCMD} usershow $_uid > /dev/null 2>&1
  63                         if [ ! "$?" -eq 0 ]; then
  64                                 _nextuid=$_uid
  65                                 break
  66                         fi
  67                         _uid=$(($_uid + 1))
  68                 done
  69         fi
  70         echo $_nextuid
  71 }
  72
  73 # show_usage
  74 #       Display usage information for this utility.
  75 #
  76 show_usage() {
  77         echo "usage: ${THISCMD} [options]"
  78         echo "  options may include:"
  79         echo "  -C              save to the configuration file only"
  80         echo "  -D              do not attempt to create the home directory"
  81         echo "  -E              disable this account after creation"
  82         echo "  -G              additional groups to add accounts to"
  83         echo "  -L              login class of the user"
  84         echo "  -M              file permission for home directory"
  85         echo "  -N              do not read configuration file"
  86         echo "  -S              a nonexistent shell is not an error"
  87         echo "  -d              home directory"
  88         echo "  -f              file from which input will be received"
  89         echo "  -g              default login group"
  90         echo "  -h              display this usage message"
  91         echo "  -k              path to skeleton home directory"
  92         echo "  -m              user welcome message file"
  93         echo "  -q              absolute minimal user feedback"
  94         echo "  -s              shell"
  95         echo "  -u              uid to start at"
  96         echo "  -w              password type: no, none, yes or random"
  97 }
  98
  99 # valid_shells
 100 #       Outputs a list of valid shells from /etc/shells. Only the
 101 #       basename of the shell is output.
 102 #
 103 valid_shells() {
 104         _prefix=
 105         cat ${ETCSHELLS} |
 106         while read _path _junk ; do
 107                 case $_path in
 108                 \#*|'')
 109                         ;;
 110                 *)
 111                         echo -n "${_prefix}`basename $_path`"
 112                         _prefix=' '
 113                         ;;
 114                 esac
 115         done
 116
 117         # /sbin/nologin is a special case
 118         [ -x "${NOLOGIN_PATH}" ] && echo -n " ${NOLOGIN}"
 119 }
 120
 121 # fullpath_from_shell shell
 122 #       Given $shell, which is either the full path to a shell or
 123 #       the basename component of a valid shell, get the
 124 #       full path to the shell from the /etc/shells file.
 125 #
 126 fullpath_from_shell() {
 127         _shell=$1
 128         [ -z "$_shell" ] && return 1
 129
 130         # /sbin/nologin is a special case; it needs to be handled
 131         # before the cat | while loop, since a 'return' from within
 132         # a subshell will not terminate the function's execution, and
 133         # the path to the nologin shell might be printed out twice.
 134         #
 135         if [ "$_shell" = "${NOLOGIN}" -o \
 136             "$_shell" = "${NOLOGIN_PATH}" ]; then
 137                 echo ${NOLOGIN_PATH}
 138                 return 0;
 139         fi
 140
 141         cat ${ETCSHELLS} |
 142         while read _path _junk ; do
 143                 case "$_path" in
 144                 \#*|'')
 145                         ;;
 146                 *)
 147                         if [ "$_path" = "$_shell" -o \
 148                             "`basename $_path`" = "$_shell" ]; then
 149                                 echo $_path
 150                                 return 0
 151                         fi
 152                         ;;
 153                 esac
 154         done
 155
 156         return 1
 157 }
 158
 159 # shell_exists shell
 160 #       If the given shell is listed in ${ETCSHELLS} or it is
 161 #       the nologin shell this function will return 0.
 162 #       Otherwise, it will return 1. If shell is valid but
 163 #       the path is invalid or it is not executable it
 164 #       will emit an informational message saying so.
 165 #
 166 shell_exists() {
 167         _sh="$1"
 168         _shellchk="${GREPCMD} '^$_sh$' ${ETCSHELLS} > /dev/null 2>&1"
 169
 170         if ! eval $_shellchk; then
 171                 # The nologin shell is not listed in /etc/shells.
 172                 if [ "$_sh" != "${NOLOGIN_PATH}" ]; then
 173                         err "Invalid shell ($_sh) for user $username."
 174                         return 1
 175                 fi
 176         fi
 177         ! [ -x "$_sh" ] &&
 178             info "The shell ($_sh) does not exist or is not executable."
 179
 180         return 0
 181 }
 182
 183 # save_config
 184 #       Save some variables to a configuration file.
 185 #       Note: not all script variables are saved, only those that
 186 #             it makes sense to save.
 187 #
 188 save_config() {
 189         echo "# Configuration file for adduser(8)."     >  ${ADDUSERCONF}
 190         echo "# NOTE: only *some* variables are saved." >> ${ADDUSERCONF}
 191         echo "# Last Modified on `${DATECMD}`."         >> ${ADDUSERCONF}
 192         echo ''                         >> ${ADDUSERCONF}
 193         echo "defaultHomePerm=$uhomeperm" >> ${ADDUSERCONF}
 194         echo "defaultLgroup=$ulogingroup" >> ${ADDUSERCONF}
 195         echo "defaultclass=$uclass"     >> ${ADDUSERCONF}
 196         echo "defaultgroups=$ugroups"   >> ${ADDUSERCONF}
 197         echo "passwdtype=$passwdtype"   >> ${ADDUSERCONF}
 198         echo "homeprefix=$homeprefix"   >> ${ADDUSERCONF}
 199         echo "defaultshell=$ushell"     >> ${ADDUSERCONF}
 200         echo "udotdir=$udotdir"         >> ${ADDUSERCONF}
 201         echo "msgfile=$msgfile"         >> ${ADDUSERCONF}
 202         echo "disableflag=$disableflag" >> ${ADDUSERCONF}
 203         echo "uidstart=$uidstart"       >> ${ADDUSERCONF}
 204 }
 205
 206 # add_user
 207 #       Add a user to the user database. If the user chose to send a welcome
 208 #       message or lock the account, do so.
 209 #
 210 add_user() {
 211
 212         # Is this a configuration run? If so, don't modify user database.
 213         #
 214         if [ -n "$configflag" ]; then
 215                 save_config
 216                 return
 217         fi
 218
 219         _uid=
 220         _name=
 221         _comment=
 222         _gecos=
 223         _home=
 224         _group=
 225         _grouplist=
 226         _shell=
 227         _class=
 228         _dotdir=
 229         _expire=
 230         _pwexpire=
 231         _passwd=
 232         _upasswd=
 233         _passwdmethod=
 234
 235         _name="-n '$username'"
 236         [ -n "$uuid" ] && _uid='-u "$uuid"'
 237         [ -n "$ulogingroup" ] && _group='-g "$ulogingroup"'
 238         [ -n "$ugroups" ] && _grouplist='-G "$ugroups"'
 239         [ -n "$ushell" ] && _shell='-s "$ushell"'
 240         [ -n "$uclass" ] && _class='-L "$uclass"'
 241         [ -n "$ugecos" ] && _comment='-c "$ugecos"'
 242         [ -n "$udotdir" ] && _dotdir='-k "$udotdir"'
 243         [ -n "$uexpire" ] && _expire='-e "$uexpire"'
 244         [ -n "$upwexpire" ] && _pwexpire='-p "$upwexpire"'
 245         if [ -z "$Dflag" -a -n "$uhome" ]; then
 246                 # The /nonexistent home directory is special. It
 247                 # means the user has no home directory.
 248                 if [ "$uhome" = "$NOHOME" ]; then
 249                         _home='-d "$uhome"'
 250                 else
 251                         # Use home directory permissions if specified
 252                         if [ -n "$uhomeperm" ]; then
 253                                 _home='-m -d "$uhome" -M "$uhomeperm"'
 254                         else
 255                                 _home='-m -d "$uhome"'
 256                         fi
 257                 fi
 258         elif [ -n "$Dflag" -a -n "$uhome" ]; then
 259                 _home='-d "$uhome"'
 260         fi
 261         case $passwdtype in
 262         no)
 263                 _passwdmethod="-w no"
 264                 _passwd="-h -"
 265                 ;;
 266         yes)
 267                 # Note on processing the password: The outer double quotes
 268                 # make literal everything except ` and \ and $.
 269                 # The outer single quotes make literal ` and $.
 270                 # We can ensure the \ isn't treated specially by specifying
 271                 # the -r switch to the read command used to obtain the input.
 272                 #
 273                 _passwdmethod="-w yes"
 274                 _passwd="-h 0"
 275                 _upasswd='echo "$upass" |'
 276                 ;;
 277         none)
 278                 _passwdmethod="-w none"
 279                 ;;
 280         random)
 281                 _passwdmethod="-w random"
 282                 ;;
 283         esac
 284
 285         _pwcmd="$_upasswd ${PWCMD} useradd $_uid $_name $_group $_grouplist $_comment"
 286         _pwcmd="$_pwcmd $_shell $_class $_home $_dotdir $_passwdmethod $_passwd"
 287         _pwcmd="$_pwcmd $_expire $_pwexpire"
 288
 289         if ! _output=`eval $_pwcmd` ; then
 290                 err "There was an error adding user ($username)."
 291                 return 1
 292         else
 293                 info "Successfully added ($username) to the user database."
 294                 if [ "random" = "$passwdtype" ]; then
 295                         randompass="$_output"
 296                         info "Password for ($username) is: $randompass"
 297                 fi
 298         fi
 299
 300         if [ -n "$disableflag" ]; then
 301                 if ${PWCMD} lock $username ; then
 302                         info "Account ($username) is locked."
 303                 else
 304                         info "Account ($username) could NOT be locked."
 305                 fi
 306         fi
 307
 308         _line=
 309         _owner=
 310         _perms=
 311         if [ -n "$msgflag" ]; then
 312                 [ -r "$msgfile" ] && {
 313                         # We're evaluating the contents of an external file.
 314                         # Let's not open ourselves up for attack. _perms will
 315                         # be empty if it's writeable only by the owner. _owner
 316                         # will *NOT* be empty if the file is owned by root.
 317                         #
 318                         _dir="`dirname $msgfile`"
 319                         _file="`basename $msgfile`"
 320                         _perms=`/usr/bin/find $_dir -name $_file -perm +07022 -prune`
 321                         _owner=`/usr/bin/find $_dir -name $_file -user 0 -prune`
 322                         if [ -z "$_owner" -o -n "$_perms" ]; then
 323                                 err "The message file ($msgfile) may be writeable only by root."
 324                                 return 1
 325                         fi
 326                         cat "$msgfile" |
 327                         while read _line ; do
 328                                 eval echo "$_line"
 329                         done | ${MAILCMD} -s"Welcome" ${username}
 330                         info "Sent welcome message to ($username)."
 331                 }
 332         fi
 333 }
 334
 335 # get_user
 336 #       Reads username of the account from standard input or from a global
 337 #       variable containing an account line from a file. The username is
 338 #       required. If this is an interactive session it will prompt in
 339 #       a loop until a username is entered. If it is batch processing from
 340 #       a file it will output an error message and return to the caller.
 341 #
 342 get_user() {
 343         _input=
 344
 345         # No need to take down user names if this is a configuration saving run.
 346         [ -n "$configflag" ] && return
 347
 348         while : ; do
 349                 if [ -z "$fflag" ]; then
 350                         echo -n "Username: "
 351                         read _input
 352                 else
 353                         _input="`echo "$fileline" | cut -f1 -d:`"
 354                 fi
 355
 356                 # There *must* be a username, and it must not exist. If
 357                 # this is an interactive session give the user an
 358                 # opportunity to retry.
 359                 #
 360                 if [ -z "$_input" ]; then
 361                         err "You must enter a username!"
 362                         [ -z "$fflag" ] && continue
 363                 fi
 364                 ${PWCMD} usershow $_input > /dev/null 2>&1
 365                 if [ "$?" -eq 0 ]; then
 366                         err "User exists!"
 367                         [ -z "$fflag" ] && continue
 368                 fi
 369                 break
 370         done
 371         username="$_input"
 372 }
 373
 374 # get_gecos
 375 #       Reads extra information about the user. Can be used both in interactive
 376 #       and batch (from file) mode.
 377 #
 378 get_gecos() {
 379         _input=
 380
 381         # No need to take down additional user information for a configuration run.
 382         [ -n "$configflag" ] && return
 383
 384         if [ -z "$fflag" ]; then
 385                 echo -n "Full name: "
 386                 read _input
 387         else
 388                 _input="`echo "$fileline" | cut -f7 -d:`"
 389         fi
 390         ugecos="$_input"
 391 }
 392
 393 # get_shell
 394 #       Get the account's shell. Works in interactive and batch mode. It
 395 #       accepts either the base name of the shell or the full path.
 396 #       If an invalid shell is entered it will simply use the default shell.
 397 #
 398 get_shell() {
 399         _input=
 400         _fullpath=
 401         ushell="$defaultshell"
 402
 403         # Make sure the current value of the shell is a valid one
 404         if [ -z "$Sflag" ]; then
 405                 if ! shell_exists $ushell ; then
 406                         info "Using default shell ${defaultshell}."
 407                         ushell="$defaultshell"
 408                 fi
 409         fi
 410
 411         if [ -z "$fflag" ]; then
 412                 echo -n "Shell ($shells) [`basename $ushell`]: "
 413                 read _input
 414         else
 415                 _input="`echo "$fileline" | cut -f9 -d:`"
 416         fi
 417         if [ -n "$_input" ]; then
 418                 if [ -n "$Sflag" ]; then
 419                         ushell="$_input"
 420                 else
 421                         _fullpath=`fullpath_from_shell $_input`
 422                         if [ -n "$_fullpath" ]; then
 423                                 ushell="$_fullpath"
 424                         else
 425                                 err "Invalid shell ($_input) for user $username."
 426                                 info "Using default shell ${defaultshell}."
 427                                 ushell="$defaultshell"
 428                         fi
 429                 fi
 430         fi
 431 }
 432
 433 # get_homedir
 434 #       Reads the account's home directory. Used both with interactive input
 435 #       and batch input.
 436 #
 437 get_homedir() {
 438         _input=
 439         if [ -z "$fflag" ]; then
 440                 echo -n "Home directory [${homeprefix}/${username}]: "
 441                 read _input
 442         else
 443                 _input="`echo "$fileline" | cut -f8 -d:`"
 444         fi
 445
 446         if [ -n "$_input" ]; then
 447                 uhome="$_input"
 448                 # if this is a configuration run, then user input is the home
 449                 # directory prefix. Otherwise it is understood to
 450                 # be $prefix/$user
 451                 #
 452                 [ -z "$configflag" ] && homeprefix="`dirname $uhome`" || homeprefix="$uhome"
 453         else
 454                 uhome="${homeprefix}/${username}"
 455         fi
 456 }
 457
 458 # get_homeperm
 459 #       Reads the account's home directory permissions.
 460 #
 461 get_homeperm() {
 462         uhomeperm=$defaultHomePerm
 463         _input=
 464         _prompt=
 465
 466         if [ -n "$uhomeperm" ]; then
 467                 _prompt="Home directory permissions [${uhomeperm}]: "
 468         else
 469                 _prompt="Home directory permissions (Leave empty for default): "
 470         fi
 471         if [ -z "$fflag" ]; then
 472                 echo -n "$_prompt"
 473                 read _input
 474         fi
 475
 476         if [ -n "$_input" ]; then
 477                 uhomeperm="$_input"
 478         fi
 479 }
 480
 481 # get_uid
 482 #       Reads a numeric userid in an interactive or batch session. Automatically
 483 #       allocates one if it is not specified.
 484 #
 485 get_uid() {
 486         uuid=${uidstart}
 487         _input=
 488         _prompt=
 489
 490         if [ -n "$uuid" ]; then
 491                 _prompt="Uid [$uuid]: "
 492         else
 493                 _prompt="Uid (Leave empty for default): "
 494         fi
 495         if [ -z "$fflag" ]; then
 496                 echo -n "$_prompt"
 497                 read _input
 498         else
 499                 _input="`echo "$fileline" | cut -f2 -d:`"
 500         fi
 501
 502         [ -n "$_input" ] && uuid=$_input
 503         uuid=`get_nextuid $uuid`
 504         uidstart=$uuid
 505 }
 506
 507 # get_class
 508 #       Reads login class of account. Can be used in interactive or batch mode.
 509 #
 510 get_class() {
 511         uclass="$defaultclass"
 512         _input=
 513         _class=${uclass:-"default"}
 514
 515         if [ -z "$fflag" ]; then
 516                 echo -n "Login class [$_class]: "
 517                 read _input
 518         else
 519                 _input="`echo "$fileline" | cut -f4 -d:`"
 520         fi
 521
 522         [ -n "$_input" ] && uclass="$_input"
 523 }
 524
 525 # get_logingroup
 526 #       Reads user's login group. Can be used in both interactive and batch
 527 #       modes. The specified value can be a group name or its numeric id.
 528 #       This routine leaves the field blank if nothing is provided and
 529 #       a default login group has not been set. The pw(8) command
 530 #       will then provide a login group with the same name as the username.
 531 #
 532 get_logingroup() {
 533         ulogingroup="$defaultLgroup"
 534         _input=
 535
 536         if [ -z "$fflag" ]; then
 537                 echo -n "Login group [${ulogingroup:-$username}]: "
 538                 read _input
 539         else
 540                 _input="`echo "$fileline" | cut -f3 -d:`"
 541         fi
 542
 543         # Pw(8) will use the username as login group if it's left empty
 544         [ -n "$_input" ] && ulogingroup="$_input"
 545 }
 546
 547 # get_groups
 548 #       Read additional groups for the user. It can be used in both interactive
 549 #       and batch modes.
 550 #
 551 get_groups() {
 552         ugroups="$defaultgroups"
 553         _input=
 554         _group=${ulogingroup:-"${username}"}
 555
 556         if [ -z "$configflag" ]; then
 557                 [ -z "$fflag" ] && echo -n "Login group is $_group. Invite $username"
 558                 [ -z "$fflag" ] && echo -n " into other groups? [$ugroups]: "
 559         else
 560                 [ -z "$fflag" ] && echo -n "Enter additional groups [$ugroups]: "
 561         fi
 562         read _input
 563
 564         [ -n "$_input" ] && ugroups="$_input"
 565 }
 566
 567 # get_expire_dates
 568 #       Read expiry information for the account and also for the password. This
 569 #       routine is used only from batch processing mode.
 570 #
 571 get_expire_dates() {
 572         upwexpire="`echo "$fileline" | cut -f5 -d:`"
 573         uexpire="`echo "$fileline" | cut -f6 -d:`"
 574 }
 575
 576 # get_password
 577 #       Read the password in batch processing mode. The password field matters
 578 #       only when the password type is "yes" or "random". If the field is empty and the
 579 #       password type is "yes", then it assumes the account has an empty passsword
 580 #       and changes the password type accordingly. If the password type is "random"
 581 #       and the password field is NOT empty, then it assumes the account will NOT
 582 #       have a random password and set passwdtype to "yes."
 583 #
 584 get_password() {
 585         # We may temporarily change a password type. Make sure it's changed
 586         # back to whatever it was before we process the next account.
 587         #
 588         [ -n "$savedpwtype" ] && {
 589                 passwdtype=$savedpwtype
 590                 savedpwtype=
 591         }
 592
 593         # There may be a ':' in the password
 594         upass=${fileline#*:*:*:*:*:*:*:*:*:}
 595
 596         if [ -z "$upass" ]; then
 597                 case $passwdtype in
 598                 yes)
 599                         # if it's empty, assume an empty password
 600                         passwdtype=none
 601                         savedpwtype=yes
 602                         ;;
 603                 esac
 604         else
 605                 case $passwdtype in
 606                 random)
 607                         passwdtype=yes
 608                         savedpwtype=random
 609                         ;;
 610                 esac
 611         fi
 612 }
 613
 614 # input_from_file
 615 #       Reads a line of account information from standard input and
 616 #       adds it to the user database.
 617 #
 618 input_from_file() {
 619         _field=
 620
 621         while read -r fileline ; do
 622                 case "$fileline" in
 623                 \#*|'')
 624                         ;;
 625                 *)
 626                         get_user || continue
 627                         get_gecos
 628                         get_uid
 629                         get_logingroup
 630                         get_class
 631                         get_shell
 632                         get_homedir
 633                         get_homeperm
 634                         get_password
 635                         get_expire_dates
 636                         ugroups="$defaultgroups"
 637
 638                         add_user
 639                         ;;
 640                 esac
 641         done
 642 }
 643
 644 # input_interactive
 645 #       Prompts for user information interactively, and commits to
 646 #       the user database.
 647 #
 648 input_interactive() {
 649         _disable=
 650         _pass=
 651         _passconfirm=
 652         _random="no"
 653         _emptypass="no"
 654         _usepass="yes"
 655         _logingroup_ok="no"
 656         _groups_ok="no"
 657         case $passwdtype in
 658         none)
 659                 _emptypass="yes"
 660                 _usepass="yes"
 661                 ;;
 662         no)
 663                 _usepass="no"
 664                 ;;
 665         random)
 666                 _random="yes"
 667                 ;;
 668         esac
 669
 670         get_user
 671         get_gecos
 672         get_uid
 673
 674         # The case where group = user is handled elsewhere, so
 675         # validate any other groups the user is invited to.
 676         until [ "$_logingroup_ok" = yes ]; do
 677                 get_logingroup
 678                 _logingroup_ok=yes
 679                 if [ -n "$ulogingroup" -a "$username" != "$ulogingroup" ]; then
 680                         if ! ${PWCMD} show group $ulogingroup > /dev/null 2>&1; then
 681                                 echo "Group $ulogingroup does not exist!"
 682                                 _logingroup_ok=no
 683                         fi
 684                 fi
 685         done
 686         until [ "$_groups_ok" = yes ]; do
 687                 get_groups
 688                 _groups_ok=yes
 689                 for i in $ugroups; do
 690                         if [ "$username" != "$i" ]; then
 691                                 if ! ${PWCMD} show group $i > /dev/null 2>&1; then
 692                                         echo "Group $i does not exist!"
 693                                         _groups_ok=no
 694                                 fi
 695                         fi
 696                 done
 697         done
 698
 699         get_class
 700         get_shell
 701         get_homedir
 702         get_homeperm
 703
 704         while : ; do
 705                 echo -n "Use password-based authentication? [$_usepass]: "
 706                 read _input
 707                 [ -z "$_input" ] && _input=$_usepass
 708                 case $_input in
 709                 [Nn][Oo]|[Nn])
 710                         passwdtype="no"
 711                         ;;
 712                 [Yy][Ee][Ss]|[Yy][Ee]|[Yy])
 713                         while : ; do
 714                                 echo -n "Use an empty password? (yes/no) [$_emptypass]: "
 715                                 read _input
 716                                 [ -n "$_input" ] && _emptypass=$_input
 717                                 case $_emptypass in
 718                                 [Nn][Oo]|[Nn])
 719                                         echo -n "Use a random password? (yes/no) [$_random]: "
 720                                         read _input
 721                                         [ -n "$_input" ] && _random="$_input"
 722                                         case $_random in
 723                                         [Yy][Ee][Ss]|[Yy][Ee]|[Yy])
 724                                                 passwdtype="random"
 725                                                 break
 726                                                 ;;
 727                                         esac
 728                                         passwdtype="yes"
 729                                         [ -n "$configflag" ] && break
 730                                         trap 'stty echo; exit' 0 1 2 3 15
 731                                         stty -echo
 732                                         echo -n "Enter password: "
 733                                         read -r upass
 734                                         echo''
 735                                         echo -n "Enter password again: "
 736                                         read -r _passconfirm
 737                                         echo ''
 738                                         stty echo
 739                                         # if user entered a blank password
 740                                         # explicitly ask again.
 741                                         [ -z "$upass" -a -z "$_passconfirm" ] \
 742                                             && continue
 743                                         ;;
 744                                 [Yy][Ee][Ss]|[Yy][Ee]|[Yy])
 745                                         passwdtype="none"
 746                                         break;
 747                                         ;;
 748                                 *)
 749                                         # invalid answer; repeat the loop
 750                                         continue
 751                                         ;;
 752                                 esac
 753                                 if [ "$upass" != "$_passconfirm" ]; then
 754                                         echo "Passwords did not match!"
 755                                         continue
 756                                 fi
 757                                 break
 758                         done
 759                         ;;
 760                 *)
 761                         # invalid answer; repeat loop
 762                         continue
 763                         ;;
 764                 esac
 765                 break;
 766         done
 767         _disable=${disableflag:-"no"}
 768         while : ; do
 769                 echo -n "Lock out the account after creation? [$_disable]: "
 770                 read _input
 771                 [ -z "$_input" ] && _input=$_disable
 772                 case $_input in
 773                 [Nn][Oo]|[Nn])
 774                         disableflag=
 775                         ;;
 776                 [Yy][Ee][Ss]|[Yy][Ee]|[Yy])
 777                         disableflag=yes
 778                         ;;
 779                 *)
 780                         # invalid answer; repeat loop
 781                         continue
 782                         ;;
 783                 esac
 784                 break
 785         done
 786
 787         # Display the information we have so far and prompt to
 788         # commit it.
 789         #
 790         _disable=${disableflag:-"no"}
 791         [ -z "$configflag" ] && printf "%-10s : %s\n" Username $username
 792         case $passwdtype in
 793         yes)
 794                 _pass='*****'
 795                 ;;
 796         no)
 797                 _pass='<disabled>'
 798                 ;;
 799         none)
 800                 _pass='<blank>'
 801                 ;;
 802         random)
 803                 _pass='<random>'
 804                 ;;
 805         esac
 806         [ -z "$configflag" ] && printf "%-10s : %s\n" "Password" "$_pass"
 807         [ -n "$configflag" ] && printf "%-10s : %s\n" "Pass Type" "$passwdtype"
 808         [ -z "$configflag" ] && printf "%-10s : %s\n" "Full Name" "$ugecos"
 809         [ -z "$configflag" ] && printf "%-10s : %s\n" "Uid" "$uuid"
 810         printf "%-10s : %s\n" "Class" "$uclass"
 811         printf "%-10s : %s %s\n" "Groups" "${ulogingroup:-$username}" "$ugroups"
 812         printf "%-10s : %s\n" "Home" "$uhome"
 813         printf "%-10s : %s\n" "Home Mode" "$uhomeperm"
 814         printf "%-10s : %s\n" "Shell" "$ushell"
 815         printf "%-10s : %s\n" "Locked" "$_disable"
 816         while : ; do
 817                 echo -n "OK? (yes/no): "
 818                 read _input
 819                 case $_input in
 820                 [Nn][Oo]|[Nn])
 821                         return 1
 822                         ;;
 823                 [Yy][Ee][Ss]|[Yy][Ee]|[Yy])
 824                         add_user
 825                         ;;
 826                 *)
 827                         continue
 828                         ;;
 829                 esac
 830                 break
 831         done
 832         return 0
 833 }
 834
 835 #### END SUBROUTINE DEFINITION ####
 836
 837 THISCMD=`/usr/bin/basename $0`
 838 DEFAULTSHELL=/bin/sh
 839 ADDUSERCONF="${ADDUSERCONF:-/etc/adduser.conf}"
 840 PWCMD="${PWCMD:-/usr/sbin/pw}"
 841 MAILCMD="${MAILCMD:-mail}"
 842 ETCSHELLS="${ETCSHELLS:-/etc/shells}"
 843 NOHOME="/nonexistent"
 844 NOLOGIN="nologin"
 845 NOLOGIN_PATH="/sbin/nologin"
 846 GREPCMD="/usr/bin/grep"
 847 DATECMD="/bin/date"
 848
 849 # Set default values
 850 #
 851 username=
 852 uuid=
 853 uidstart=
 854 ugecos=
 855 ulogingroup=
 856 uclass=
 857 uhome=
 858 uhomeperm=
 859 upass=
 860 ushell=
 861 udotdir=/usr/share/skel
 862 ugroups=
 863 uexpire=
 864 upwexpire=
 865 shells="`valid_shells`"
 866 passwdtype="yes"
 867 msgfile=/etc/adduser.msg
 868 msgflag=
 869 quietflag=
 870 configflag=
 871 fflag=
 872 infile=
 873 disableflag=
 874 Dflag=
 875 Sflag=
 876 readconfig="yes"
 877 homeprefix="/home"
 878 randompass=
 879 fileline=
 880 savedpwtype=
 881 defaultclass=
 882 defaultLgroup=
 883 defaultgroups=
 884 defaultshell="${DEFAULTSHELL}"
 885 defaultHomePerm=
 886
 887 # Make sure the user running this program is root. This isn't a security
 888 # measure as much as it is a useful method of reminding the user to
 889 # 'su -' before he/she wastes time entering data that won't be saved.
 890 #
 891 procowner=${procowner:-`/usr/bin/id -u`}
 892 if [ "$procowner" != "0" ]; then
 893         err 'you must be the super-user (uid 0) to use this utility.'
 894         exit 1
 895 fi
 896
 897 # Overide from our conf file
 898 # Quickly go through the commandline line to see if we should read
 899 # from our configuration file. The actual parsing of the commandline
 900 # arguments happens after we read in our configuration file (commandline
 901 # should override configuration file).
 902 #
 903 for _i in $* ; do
 904         if [ "$_i" = "-N" ]; then
 905                 readconfig=
 906                 break;
 907         fi
 908 done
 909 if [ -n "$readconfig" ]; then
 910         # On a long-lived system, the first time this script is run it
 911         # will barf upon reading the configuration file for its perl predecessor.
 912         if ( . ${ADDUSERCONF} > /dev/null 2>&1 ); then
 913                 [ -r ${ADDUSERCONF} ] && . ${ADDUSERCONF} > /dev/null 2>&1
 914         fi
 915 fi
 916
 917 # Process command-line options
 918 #
 919 for _switch ; do
 920         case $_switch in
 921         -L)
 922                 defaultclass="$2"
 923                 shift; shift
 924                 ;;
 925         -C)
 926                 configflag=yes
 927                 shift
 928                 ;;
 929         -D)
 930                 Dflag=yes
 931                 shift
 932                 ;;
 933         -E)
 934                 disableflag=yes
 935                 shift
 936                 ;;
 937         -k)
 938                 udotdir="$2"
 939                 shift; shift
 940                 ;;
 941         -f)
 942                 [ "$2" != "-" ] && infile="$2"
 943                 fflag=yes
 944                 shift; shift
 945                 ;;
 946         -g)
 947                 defaultLgroup="$2"
 948                 shift; shift
 949                 ;;
 950         -G)
 951                 defaultgroups="$2"
 952                 shift; shift
 953                 ;;
 954         -h)
 955                 show_usage
 956                 exit 0
 957                 ;;
 958         -d)
 959                 homeprefix="$2"
 960                 shift; shift
 961                 ;;
 962         -m)
 963                 case "$2" in
 964                 [Nn][Oo])
 965                         msgflag=
 966                         ;;
 967                 *)
 968                         msgflag=yes
 969                         msgfile="$2"
 970                         ;;
 971                 esac
 972                 shift; shift
 973                 ;;
 974         -M)
 975                 defaultHomePerm=$2
 976                 shift; shift
 977                 ;;
 978         -N)
 979                 readconfig=
 980                 shift
 981                 ;;
 982         -w)
 983                 case "$2" in
 984                 no|none|random|yes)
 985                         passwdtype=$2
 986                         ;;
 987                 *)
 988                         show_usage
 989                         exit 1
 990                         ;;
 991                 esac
 992                 shift; shift
 993                 ;;
 994         -q)
 995                 quietflag=yes
 996                 shift
 997                 ;;
 998         -s)
 999                 defaultshell="`fullpath_from_shell $2`"
1000                 shift; shift
1001                 ;;
1002         -S)
1003                 Sflag=yes
1004                 shift
1005                 ;;
1006         -u)
1007                 uidstart=$2
1008                 shift; shift
1009                 ;;
1010         esac
1011 done
1012
1013 # If the -f switch was used, get input from a file. Otherwise,
1014 # this is an interactive session.
1015 #
1016 if [ -n "$fflag" ]; then
1017         if [ -z "$infile" ]; then
1018                 input_from_file
1019         elif [ -n "$infile" ]; then
1020                 if [ -r "$infile" ]; then
1021                         input_from_file < $infile
1022                 else
1023                         err "File ($infile) is unreadable or does not exist."
1024                 fi
1025         fi
1026 else
1027         input_interactive
1028         while : ; do
1029                 if [ -z "$configflag" ]; then
1030                         echo -n "Add another user? (yes/no): "
1031                 else
1032                         echo -n "Re-edit the default configuration? (yes/no): "
1033                 fi
1034                 read _input
1035                 case $_input in
1036                 [Yy][Ee][Ss]|[Yy][Ee]|[Yy])
1037                         uidstart=`get_nextuid $uidstart`
1038                         input_interactive
1039                         continue
1040                         ;;
1041                 [Nn][Oo]|[Nn])
1042                         echo "Goodbye!"
1043                         ;;
1044                 *)
1045                         continue
1046                         ;;
1047                 esac
1048                 break
1049         done
1050 fi