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 # $FreeBSD$
  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 $_path`"
 112                         _prefix=' '
 113                         ;;
 114                 esac
 115         done
 116
 117         # /usr/sbin/nologin is a special case
 118         [ -x "${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         # /usr/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 {
 168         _sh="$1"
 169         _shellchk="${GREPCMD} '^$_sh$' ${ETCSHELLS} > /dev/null 2>&1"
 170
 171         if ! eval $_shellchk; then
 172                 # The nologin shell is not listed in /etc/shells.
 173                 if [ "$_sh" != "${NOLOGIN_PATH}" ]; then
 174                         err "Invalid shell ($_sh) for user $username."
 175                         return 1
 176                 fi
 177         fi
 178         ! [ -x "$_sh" ] &&
 179             info "The shell ($_sh) does not exist or is not executable."
 180
 181         return 0
 182 }
 183
 184 # save_config
 185 #       Save some variables to a configuration file.
 186 #       Note: not all script variables are saved, only those that
 187 #             it makes sense to save.
 188 #
 189 save_config() {
 190         echo "# Configuration file for adduser(8)."     >  ${ADDUSERCONF}
 191         echo "# NOTE: only *some* variables are saved." >> ${ADDUSERCONF}
 192         echo "# Last Modified on `${DATECMD}`."         >> ${ADDUSERCONF}
 193         echo ''                         >> ${ADDUSERCONF}
 194         echo "defaultHomePerm=$uhomeperm" >> ${ADDUSERCONF}
 195         echo "defaultLgroup=$ulogingroup" >> ${ADDUSERCONF}
 196         echo "defaultclass=$uclass"     >> ${ADDUSERCONF}
 197         echo "defaultgroups=$ugroups"   >> ${ADDUSERCONF}
 198         echo "passwdtype=$passwdtype"   >> ${ADDUSERCONF}
 199         echo "homeprefix=$homeprefix"   >> ${ADDUSERCONF}
 200         echo "defaultshell=$ushell"     >> ${ADDUSERCONF}
 201         echo "udotdir=$udotdir"         >> ${ADDUSERCONF}
 202         echo "msgfile=$msgfile"         >> ${ADDUSERCONF}
 203         echo "disableflag=$disableflag" >> ${ADDUSERCONF}
 204         echo "uidstart=$uidstart"       >> ${ADDUSERCONF}
 205 }
 206
 207 # add_user
 208 #       Add a user to the user database. If the user chose to send a welcome
 209 #       message or lock the account, do so.
 210 #
 211 add_user() {
 212
 213         # Is this a configuration run? If so, don't modify user database.
 214         #
 215         if [ -n "$configflag" ]; then
 216                 save_config
 217                 return
 218         fi
 219
 220         _uid=
 221         _name=
 222         _comment=
 223         _gecos=
 224         _home=
 225         _group=
 226         _grouplist=
 227         _shell=
 228         _class=
 229         _dotdir=
 230         _expire=
 231         _pwexpire=
 232         _passwd=
 233         _upasswd=
 234         _passwdmethod=
 235
 236         _name="-n '$username'"
 237         [ -n "$uuid" ] && _uid='-u "$uuid"'
 238         [ -n "$ulogingroup" ] && _group='-g "$ulogingroup"'
 239         [ -n "$ugroups" ] && _grouplist='-G "$ugroups"'
 240         [ -n "$ushell" ] && _shell='-s "$ushell"'
 241         [ -n "$uclass" ] && _class='-L "$uclass"'
 242         [ -n "$ugecos" ] && _comment='-c "$ugecos"'
 243         [ -n "$udotdir" ] && _dotdir='-k "$udotdir"'
 244         [ -n "$uexpire" ] && _expire='-e "$uexpire"'
 245         [ -n "$upwexpire" ] && _pwexpire='-p "$upwexpire"'
 246         if [ -z "$Dflag" -a -n "$uhome" ]; then
 247                 # The /nonexistent home directory is special. It
 248                 # means the user has no home directory.
 249                 if [ "$uhome" = "$NOHOME" ]; then
 250                         _home='-d "$uhome"'
 251                 else
 252                         # Use home directory permissions if specified
 253                         if [ -n "$uhomeperm" ]; then
 254                                 _home='-m -d "$uhome" -M "$uhomeperm"'
 255                         else
 256                                 _home='-m -d "$uhome"'
 257                         fi
 258                 fi
 259         elif [ -n "$Dflag" -a -n "$uhome" ]; then
 260                 _home='-d "$uhome"'
 261         fi
 262         case $passwdtype in
 263         no)
 264                 _passwdmethod="-w no"
 265                 _passwd="-h -"
 266                 ;;
 267         yes)
 268                 # Note on processing the password: The outer double quotes
 269                 # make literal everything except ` and \ and $.
 270                 # The outer single quotes make literal ` and $.
 271                 # We can ensure the \ isn't treated specially by specifying
 272                 # the -r switch to the read command used to obtain the input.
 273                 #
 274                 _passwdmethod="-w yes"
 275                 _passwd="-h 0"
 276                 _upasswd='echo "$upass" |'
 277                 ;;
 278         none)
 279                 _passwdmethod="-w none"
 280                 ;;
 281         random)
 282                 _passwdmethod="-w random"
 283                 ;;
 284         esac
 285
 286         _pwcmd="$_upasswd ${PWCMD} useradd $_uid $_name $_group $_grouplist $_comment"
 287         _pwcmd="$_pwcmd $_shell $_class $_home $_dotdir $_passwdmethod $_passwd"
 288         _pwcmd="$_pwcmd $_expire $_pwexpire"
 289
 290         if ! _output=`eval $_pwcmd` ; then
 291                 err "There was an error adding user ($username)."
 292                 return 1
 293         else
 294                 info "Successfully added ($username) to the user database."
 295                 if [ "random" = "$passwdtype" ]; then
 296                         randompass="$_output"
 297                         info "Password for ($username) is: $randompass"
 298                 fi
 299         fi
 300
 301         if [ -n "$disableflag" ]; then
 302                 if ${PWCMD} lock $username ; then
 303                         info "Account ($username) is locked."
 304                 else
 305                         info "Account ($username) could NOT be locked."
 306                 fi
 307         fi
 308
 309         _line=
 310         _owner=
 311         _perms=
 312         if [ -n "$msgflag" ]; then
 313                 [ -r "$msgfile" ] && {
 314                         # We're evaluating the contents of an external file.
 315                         # Let's not open ourselves up for attack. _perms will
 316                         # be empty if it's writeable only by the owner. _owner
 317                         # will *NOT* be empty if the file is owned by root.
 318                         #
 319                         _dir="`dirname $msgfile`"
 320                         _file="`basename $msgfile`"
 321                         _perms=`/usr/bin/find $_dir -name $_file -perm +07022 -prune`
 322                         _owner=`/usr/bin/find $_dir -name $_file -user 0 -prune`
 323                         if [ -z "$_owner" -o -n "$_perms" ]; then
 324                                 err "The message file ($msgfile) may be writeable only by root."
 325                                 return 1
 326                         fi
 327                         cat "$msgfile" |
 328                         while read _line ; do
 329                                 eval echo "$_line"
 330                         done | ${MAILCMD} -s"Welcome" ${username}
 331                         info "Sent welcome message to ($username)."
 332                 }
 333         fi
 334 }
 335
 336 # get_user
 337 #       Reads username of the account from standard input or from a global
 338 #       variable containing an account line from a file. The username is
 339 #       required. If this is an interactive session it will prompt in
 340 #       a loop until a username is entered. If it is batch processing from
 341 #       a file it will output an error message and return to the caller.
 342 #
 343 get_user() {
 344         _input=
 345
 346         # No need to take down user names if this is a configuration saving run.
 347         [ -n "$configflag" ] && return
 348
 349         while : ; do
 350                 if [ -z "$fflag" ]; then
 351                         echo -n "Username: "
 352                         read _input
 353                 else
 354                         _input="`echo "$fileline" | cut -f1 -d:`"
 355                 fi
 356
 357                 # There *must* be a username, and it must not exist. If
 358                 # this is an interactive session give the user an
 359                 # opportunity to retry.
 360                 #
 361                 if [ -z "$_input" ]; then
 362                         err "You must enter a username!"
 363                         [ -z "$fflag" ] && continue
 364                 fi
 365                 ${PWCMD} usershow $_input > /dev/null 2>&1
 366                 if [ "$?" -eq 0 ]; then
 367                         err "User exists!"
 368                         [ -z "$fflag" ] && continue
 369                 fi
 370                 break
 371         done
 372         username="$_input"
 373 }
 374
 375 # get_gecos
 376 #       Reads extra information about the user. Can be used both in interactive
 377 #       and batch (from file) mode.
 378 #
 379 get_gecos() {
 380         _input=
 381
 382         # No need to take down additional user information for a configuration run.
 383         [ -n "$configflag" ] && return
 384
 385         if [ -z "$fflag" ]; then
 386                 echo -n "Full name: "
 387                 read _input
 388         else
 389                 _input="`echo "$fileline" | cut -f7 -d:`"
 390         fi
 391         ugecos="$_input"
 392 }
 393
 394 # get_shell
 395 #       Get the account's shell. Works in interactive and batch mode. It
 396 #       accepts either the base name of the shell or the full path.
 397 #       If an invalid shell is entered it will simply use the default shell.
 398 #
 399 get_shell() {
 400         _input=
 401         _fullpath=
 402         ushell="$defaultshell"
 403
 404         # Make sure the current value of the shell is a valid one
 405         if [ -z "$Sflag" ]; then
 406                 if ! shell_exists $ushell ; then
 407                         info "Using default shell ${defaultshell}."
 408                         ushell="$defaultshell"
 409                 fi
 410         fi
 411
 412         if [ -z "$fflag" ]; then
 413                 echo -n "Shell ($shells) [`basename $ushell`]: "
 414                 read _input
 415         else
 416                 _input="`echo "$fileline" | cut -f9 -d:`"
 417         fi
 418         if [ -n "$_input" ]; then
 419                 if [ -n "$Sflag" ]; then
 420                         ushell="$_input"
 421                 else
 422                         _fullpath=`fullpath_from_shell $_input`
 423                         if [ -n "$_fullpath" ]; then
 424                                 ushell="$_fullpath"
 425                         else
 426                                 err "Invalid shell ($_input) for user $username."
 427                                 info "Using default shell ${defaultshell}."
 428                                 ushell="$defaultshell"
 429                         fi
 430                 fi
 431         fi
 432 }
 433
 434 # get_homedir
 435 #       Reads the account's home directory. Used both with interactive input
 436 #       and batch input.
 437 #
 438 get_homedir() {
 439         _input=
 440         if [ -z "$fflag" ]; then
 441                 echo -n "Home directory [${homeprefix}/${username}]: "
 442                 read _input
 443         else
 444                 _input="`echo "$fileline" | cut -f8 -d:`"
 445         fi
 446
 447         if [ -n "$_input" ]; then
 448                 uhome="$_input"
 449                 # if this is a configuration run, then user input is the home
 450                 # directory prefix. Otherwise it is understood to
 451                 # be $prefix/$user
 452                 #
 453                 [ -z "$configflag" ] && homeprefix="`dirname $uhome`" || homeprefix="$uhome"
 454         else
 455                 uhome="${homeprefix}/${username}"
 456         fi
 457 }
 458
 459 # get_homeperm
 460 #       Reads the account's home directory permissions.
 461 #
 462 get_homeperm() {
 463         uhomeperm=$defaultHomePerm
 464         _input=
 465         _prompt=
 466
 467         if [ -n "$uhomeperm" ]; then
 468                 _prompt="Home directory permissions [${uhomeperm}]: "
 469         else
 470                 _prompt="Home directory permissions (Leave empty for default): "
 471         fi
 472         if [ -z "$fflag" ]; then
 473                 echo -n "$_prompt"
 474                 read _input
 475         fi
 476
 477         if [ -n "$_input" ]; then
 478                 uhomeperm="$_input"
 479         fi
 480 }
 481
 482 # get_uid
 483 #       Reads a numeric userid in an interactive or batch session. Automatically
 484 #       allocates one if it is not specified.
 485 #
 486 get_uid() {
 487         uuid=${uidstart}
 488         _input=
 489         _prompt=
 490
 491         if [ -n "$uuid" ]; then
 492                 _prompt="Uid [$uuid]: "
 493         else
 494                 _prompt="Uid (Leave empty for default): "
 495         fi
 496         if [ -z "$fflag" ]; then
 497                 echo -n "$_prompt"
 498                 read _input
 499         else
 500                 _input="`echo "$fileline" | cut -f2 -d:`"
 501         fi
 502
 503         [ -n "$_input" ] && uuid=$_input
 504         uuid=`get_nextuid $uuid`
 505         uidstart=$uuid
 506 }
 507
 508 # get_class
 509 #       Reads login class of account. Can be used in interactive or batch mode.
 510 #
 511 get_class() {
 512         uclass="$defaultclass"
 513         _input=
 514         _class=${uclass:-"default"}
 515
 516         if [ -z "$fflag" ]; then
 517                 echo -n "Login class [$_class]: "
 518                 read _input
 519         else
 520                 _input="`echo "$fileline" | cut -f4 -d:`"
 521         fi
 522
 523         [ -n "$_input" ] && uclass="$_input"
 524 }
 525
 526 # get_logingroup
 527 #       Reads user's login group. Can be used in both interactive and batch
 528 #       modes. The specified value can be a group name or its numeric id.
 529 #       This routine leaves the field blank if nothing is provided and
 530 #       a default login group has not been set. The pw(8) command
 531 #       will then provide a login group with the same name as the username.
 532 #
 533 get_logingroup() {
 534         ulogingroup="$defaultLgroup"
 535         _input=
 536
 537         if [ -z "$fflag" ]; then
 538                 echo -n "Login group [${ulogingroup:-$username}]: "
 539                 read _input
 540         else
 541                 _input="`echo "$fileline" | cut -f3 -d:`"
 542         fi
 543
 544         # Pw(8) will use the username as login group if it's left empty
 545         [ -n "$_input" ] && ulogingroup="$_input"
 546 }
 547
 548 # get_groups
 549 #       Read additional groups for the user. It can be used in both interactive
 550 #       and batch modes.
 551 #
 552 get_groups() {
 553         ugroups="$defaultgroups"
 554         _input=
 555         _group=${ulogingroup:-"${username}"}
 556
 557         if [ -z "$configflag" ]; then
 558                 [ -z "$fflag" ] && echo -n "Login group is $_group. Invite $username"
 559                 [ -z "$fflag" ] && echo -n " into other groups? [$ugroups]: "
 560         else
 561                 [ -z "$fflag" ] && echo -n "Enter additional groups [$ugroups]: "
 562         fi
 563         read _input
 564
 565         [ -n "$_input" ] && ugroups="$_input"
 566 }
 567
 568 # get_expire_dates
 569 #       Read expiry information for the account and also for the password. This
 570 #       routine is used only from batch processing mode.
 571 #
 572 get_expire_dates() {
 573         upwexpire="`echo "$fileline" | cut -f5 -d:`"
 574         uexpire="`echo "$fileline" | cut -f6 -d:`"
 575 }
 576
 577 # get_password
 578 #       Read the password in batch processing mode. The password field matters
 579 #       only when the password type is "yes" or "random". If the field is empty and the
 580 #       password type is "yes", then it assumes the account has an empty passsword
 581 #       and changes the password type accordingly. If the password type is "random"
 582 #       and the password field is NOT empty, then it assumes the account will NOT
 583 #       have a random password and set passwdtype to "yes."
 584 #
 585 get_password() {
 586         # We may temporarily change a password type. Make sure it's changed
 587         # back to whatever it was before we process the next account.
 588         #
 589         [ -n "$savedpwtype" ] && {
 590                 passwdtype=$savedpwtype
 591                 savedpwtype=
 592         }
 593
 594         # There may be a ':' in the password
 595         upass=${fileline#*:*:*:*:*:*:*:*:*:}
 596
 597         if [ -z "$upass" ]; then
 598                 case $passwdtype in
 599                 yes)
 600                         # if it's empty, assume an empty password
 601                         passwdtype=none
 602                         savedpwtype=yes
 603                         ;;
 604                 esac
 605         else
 606                 case $passwdtype in
 607                 random)
 608                         passwdtype=yes
 609                         savedpwtype=random
 610                         ;;
 611                 esac
 612         fi
 613 }
 614
 615 # input_from_file
 616 #       Reads a line of account information from standard input and
 617 #       adds it to the user database.
 618 #
 619 input_from_file() {
 620         _field=
 621
 622         while read -r fileline ; do
 623                 case "$fileline" in
 624                 \#*|'')
 625                         ;;
 626                 *)
 627                         get_user || continue
 628                         get_gecos
 629                         get_uid
 630                         get_logingroup
 631                         get_class
 632                         get_shell
 633                         get_homedir
 634                         get_homeperm
 635                         get_password
 636                         get_expire_dates
 637                         ugroups="$defaultgroups"
 638
 639                         add_user
 640                         ;;
 641                 esac
 642         done
 643 }
 644
 645 # input_interactive
 646 #       Prompts for user information interactively, and commits to
 647 #       the user database.
 648 #
 649 input_interactive() {
 650
 651         _disable=
 652         _pass=
 653         _passconfirm=
 654         _random="no"
 655         _emptypass="no"
 656         _usepass="yes"
 657         _logingroup_ok="no"
 658         _groups_ok="no"
 659         case $passwdtype in
 660         none)
 661                 _emptypass="yes"
 662                 _usepass="yes"
 663                 ;;
 664         no)
 665                 _usepass="no"
 666                 ;;
 667         random)
 668                 _random="yes"
 669                 ;;
 670         esac
 671
 672         get_user
 673         get_gecos
 674         get_uid
 675
 676         # The case where group = user is handled elsewhere, so
 677         # validate any other groups the user is invited to.
 678         until [ "$_logingroup_ok" = yes ]; do
 679                 get_logingroup
 680                 _logingroup_ok=yes
 681                 if [ -n "$ulogingroup" -a "$username" != "$ulogingroup" ]; then
 682                         if ! ${PWCMD} show group $ulogingroup > /dev/null 2>&1; then
 683                                 echo "Group $ulogingroup does not exist!"
 684                                 _logingroup_ok=no
 685                         fi
 686                 fi
 687         done
 688         until [ "$_groups_ok" = yes ]; do
 689                 get_groups
 690                 _groups_ok=yes
 691                 for i in $ugroups; do
 692                         if [ "$username" != "$i" ]; then
 693                                 if ! ${PWCMD} show group $i > /dev/null 2>&1; then
 694                                         echo "Group $i does not exist!"
 695                                         _groups_ok=no
 696                                 fi
 697                         fi
 698                 done
 699         done
 700
 701         get_class
 702         get_shell
 703         get_homedir
 704         get_homeperm
 705
 706         while : ; do
 707                 echo -n "Use password-based authentication? [$_usepass]: "
 708                 read _input
 709                 [ -z "$_input" ] && _input=$_usepass
 710                 case $_input in
 711                 [Nn][Oo]|[Nn])
 712                         passwdtype="no"
 713                         ;;
 714                 [Yy][Ee][Ss]|[Yy][Ee]|[Yy])
 715                         while : ; do
 716                                 echo -n "Use an empty password? (yes/no) [$_emptypass]: "
 717                                 read _input
 718                                 [ -n "$_input" ] && _emptypass=$_input
 719                                 case $_emptypass in
 720                                 [Nn][Oo]|[Nn])
 721                                         echo -n "Use a random password? (yes/no) [$_random]: "
 722                                         read _input
 723                                         [ -n "$_input" ] && _random="$_input"
 724                                         case $_random in
 725                                         [Yy][Ee][Ss]|[Yy][Ee]|[Yy])
 726                                                 passwdtype="random"
 727                                                 break
 728                                                 ;;
 729                                         esac
 730                                         passwdtype="yes"
 731                                         [ -n "$configflag" ] && break
 732                                         trap 'stty echo; exit' 0 1 2 3 15
 733                                         stty -echo
 734                                         echo -n "Enter password: "
 735                                         read -r upass
 736                                         echo''
 737                                         echo -n "Enter password again: "
 738                                         read -r _passconfirm
 739                                         echo ''
 740                                         stty echo
 741                                         # if user entered a blank password
 742                                         # explicitly ask again.
 743                                         [ -z "$upass" -a -z "$_passconfirm" ] \
 744                                             && continue
 745                                         ;;
 746                                 [Yy][Ee][Ss]|[Yy][Ee]|[Yy])
 747                                         passwdtype="none"
 748                                         break;
 749                                         ;;
 750                                 *)
 751                                         # invalid answer; repeat the loop
 752                                         continue
 753                                         ;;
 754                                 esac
 755                                 if [ "$upass" != "$_passconfirm" ]; then
 756                                         echo "Passwords did not match!"
 757                                         continue
 758                                 fi
 759                                 break
 760                         done
 761                         ;;
 762                 *)
 763                         # invalid answer; repeat loop
 764                         continue
 765                         ;;
 766                 esac
 767                 break;
 768         done
 769         _disable=${disableflag:-"no"}
 770         while : ; do
 771                 echo -n "Lock out the account after creation? [$_disable]: "
 772                 read _input
 773                 [ -z "$_input" ] && _input=$_disable
 774                 case $_input in
 775                 [Nn][Oo]|[Nn])
 776                         disableflag=
 777                         ;;
 778                 [Yy][Ee][Ss]|[Yy][Ee]|[Yy])
 779                         disableflag=yes
 780                         ;;
 781                 *)
 782                         # invalid answer; repeat loop
 783                         continue
 784                         ;;
 785                 esac
 786                 break
 787         done
 788
 789         # Display the information we have so far and prompt to
 790         # commit it.
 791         #
 792         _disable=${disableflag:-"no"}
 793         [ -z "$configflag" ] && printf "%-10s : %s\n" Username $username
 794         case $passwdtype in
 795         yes)
 796                 _pass='*****'
 797                 ;;
 798         no)
 799                 _pass='<disabled>'
 800                 ;;
 801         none)
 802                 _pass='<blank>'
 803                 ;;
 804         random)
 805                 _pass='<random>'
 806                 ;;
 807         esac
 808         [ -z "$configflag" ] && printf "%-10s : %s\n" "Password" "$_pass"
 809         [ -n "$configflag" ] && printf "%-10s : %s\n" "Pass Type" "$passwdtype"
 810         [ -z "$configflag" ] && printf "%-10s : %s\n" "Full Name" "$ugecos"
 811         [ -z "$configflag" ] && printf "%-10s : %s\n" "Uid" "$uuid"
 812         printf "%-10s : %s\n" "Class" "$uclass"
 813         printf "%-10s : %s %s\n" "Groups" "${ulogingroup:-$username}" "$ugroups"
 814         printf "%-10s : %s\n" "Home" "$uhome"
 815         printf "%-10s : %s\n" "Home Mode" "$uhomeperm"
 816         printf "%-10s : %s\n" "Shell" "$ushell"
 817         printf "%-10s : %s\n" "Locked" "$_disable"
 818         while : ; do
 819                 echo -n "OK? (yes/no): "
 820                 read _input
 821                 case $_input in
 822                 [Nn][Oo]|[Nn])
 823                         return 1
 824                         ;;
 825                 [Yy][Ee][Ss]|[Yy][Ee]|[Yy])
 826                         add_user
 827                         ;;
 828                 *)
 829                         continue
 830                         ;;
 831                 esac
 832                 break
 833         done
 834         return 0
 835 }
 836
 837 #### END SUBROUTINE DEFINITION ####
 838
 839 THISCMD=`/usr/bin/basename $0`
 840 DEFAULTSHELL=/bin/sh
 841 ADDUSERCONF="${ADDUSERCONF:-/etc/adduser.conf}"
 842 PWCMD="${PWCMD:-/usr/sbin/pw}"
 843 MAILCMD="${MAILCMD:-mail}"
 844 ETCSHELLS="${ETCSHELLS:-/etc/shells}"
 845 NOHOME="/nonexistent"
 846 NOLOGIN="nologin"
 847 NOLOGIN_PATH="/usr/sbin/nologin"
 848 GREPCMD="/usr/bin/grep"
 849 DATECMD="/bin/date"
 850
 851 # Set default values
 852 #
 853 username=
 854 uuid=
 855 uidstart=
 856 ugecos=
 857 ulogingroup=
 858 uclass=
 859 uhome=
 860 uhomeperm=
 861 upass=
 862 ushell=
 863 udotdir=/usr/share/skel
 864 ugroups=
 865 uexpire=
 866 upwexpire=
 867 shells="`valid_shells`"
 868 passwdtype="yes"
 869 msgfile=/etc/adduser.msg
 870 msgflag=
 871 quietflag=
 872 configflag=
 873 fflag=
 874 infile=
 875 disableflag=
 876 Dflag=
 877 Sflag=
 878 readconfig="yes"
 879 homeprefix="/home"
 880 randompass=
 881 fileline=
 882 savedpwtype=
 883 defaultclass=
 884 defaultLgroup=
 885 defaultgroups=
 886 defaultshell="${DEFAULTSHELL}"
 887 defaultHomePerm=
 888
 889 # Make sure the user running this program is root. This isn't a security
 890 # measure as much as it is a usefull method of reminding the user to
 891 # 'su -' before he/she wastes time entering data that won't be saved.
 892 #
 893 procowner=${procowner:-`/usr/bin/id -u`}
 894 if [ "$procowner" != "0" ]; then
 895         err 'you must be the super-user (uid 0) to use this utility.'
 896         exit 1
 897 fi
 898
 899 # Overide from our conf file
 900 # Quickly go through the commandline line to see if we should read
 901 # from our configuration file. The actual parsing of the commandline
 902 # arguments happens after we read in our configuration file (commandline
 903 # should override configuration file).
 904 #
 905 for _i in $* ; do
 906         if [ "$_i" = "-N" ]; then
 907                 readconfig=
 908                 break;
 909         fi
 910 done
 911 if [ -n "$readconfig" ]; then
 912         # On a long-lived system, the first time this script is run it
 913         # will barf upon reading the configuration file for its perl predecessor.
 914         if ( . ${ADDUSERCONF} > /dev/null 2>&1 ); then
 915                 [ -r ${ADDUSERCONF} ] && . ${ADDUSERCONF} > /dev/null 2>&1
 916         fi
 917 fi
 918
 919 # Proccess command-line options
 920 #
 921 for _switch ; do
 922         case $_switch in
 923         -L)
 924                 defaultclass="$2"
 925                 shift; shift
 926                 ;;
 927         -C)
 928                 configflag=yes
 929                 shift
 930                 ;;
 931         -D)
 932                 Dflag=yes
 933                 shift
 934                 ;;
 935         -E)
 936                 disableflag=yes
 937                 shift
 938                 ;;
 939         -k)
 940                 udotdir="$2"
 941                 shift; shift
 942                 ;;
 943         -f)
 944                 [ "$2" != "-" ] && infile="$2"
 945                 fflag=yes
 946                 shift; shift
 947                 ;;
 948         -g)
 949                 defaultLgroup="$2"
 950                 shift; shift
 951                 ;;
 952         -G)
 953                 defaultgroups="$2"
 954                 shift; shift
 955                 ;;
 956         -h)
 957                 show_usage
 958                 exit 0
 959                 ;;
 960         -d)
 961                 homeprefix="$2"
 962                 shift; shift
 963                 ;;
 964         -m)
 965                 case "$2" in
 966                 [Nn][Oo])
 967                         msgflag=
 968                         ;;
 969                 *)
 970                         msgflag=yes
 971                         msgfile="$2"
 972                         ;;
 973                 esac
 974                 shift; shift
 975                 ;;
 976         -M)
 977                 defaultHomePerm=$2
 978                 shift; shift
 979                 ;;
 980         -N)
 981                 readconfig=
 982                 shift
 983                 ;;
 984         -w)
 985                 case "$2" in
 986                 no|none|random|yes)
 987                         passwdtype=$2
 988                         ;;
 989                 *)
 990                         show_usage
 991                         exit 1
 992                         ;;
 993                 esac
 994                 shift; shift
 995                 ;;
 996         -q)
 997                 quietflag=yes
 998                 shift
 999                 ;;
1000         -s)
1001                 defaultshell="`fullpath_from_shell $2`"
1002                 shift; shift
1003                 ;;
1004         -S)
1005                 Sflag=yes
1006                 shift
1007                 ;;
1008         -u)
1009                 uidstart=$2
1010                 shift; shift
1011                 ;;
1012         esac
1013 done
1014
1015 # If the -f switch was used, get input from a file. Otherwise,
1016 # this is an interactive session.
1017 #
1018 if [ -n "$fflag" ]; then
1019         if [ -z "$infile" ]; then
1020                 input_from_file
1021         elif [ -n "$infile" ]; then
1022                 if [ -r "$infile" ]; then
1023                         input_from_file < $infile
1024                 else
1025                         err "File ($infile) is unreadable or does not exist."
1026                 fi
1027         fi
1028 else
1029         input_interactive
1030         while : ; do
1031                 if [ -z "$configflag" ]; then
1032                         echo -n "Add another user? (yes/no): "
1033                 else
1034                         echo -n "Re-edit the default configuration? (yes/no): "
1035                 fi
1036                 read _input
1037                 case $_input in
1038                 [Yy][Ee][Ss]|[Yy][Ee]|[Yy])
1039                         uidstart=`get_nextuid $uidstart`
1040                         input_interactive
1041                         continue
1042                         ;;
1043                 [Nn][Oo]|[Nn])
1044                         echo "Goodbye!"
1045                         ;;
1046                 *)
1047                         continue
1048                         ;;
1049                 esac
1050                 break
1051         done
1052 fi