adduser/adduser.perl

   1 #!/usr/bin/perl
   2 #
   3 # Copyright (c) 1995-1996 Wolfram Schneider <wosch@FreeBSD.org>. Berlin.
   4 # All rights reserved.
   5 #
   6 # Redistribution and use in source and binary forms, with or without
   7 # modification, are permitted provided that the following conditions
   8 # are met:
   9 # 1. Redistributions of source code must retain the above copyright
  10 #    notice, this list of conditions and the following disclaimer.
  11 # 2. Redistributions in binary form must reproduce the above copyright
  12 #    notice, this list of conditions and the following disclaimer in the
  13 #    documentation and/or other materials provided with the distribution.
  14 #
  15 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25 # SUCH DAMAGE.
  26 #
  27 # $FreeBSD$
  28
  29
  30 # read variables
  31 sub variables {
  32     $verbose = 1;               # verbose = [0-2]
  33     $usernameregexp = "^[a-z0-9_][a-z0-9_-]*\$"; # configurable
  34     $defaultusernameregexp = $usernameregexp; # remains constant
  35     $defaultusepassword = "yes";        # use password authentication for new users
  36     $defaultenableaccount = "yes"; # enable the account by default
  37     $defaultemptypassword = "no"; # don't create an empty password
  38     $dotdir = "/usr/share/skel"; # copy dotfiles from this dir
  39     $dotdir_bak = $dotdir;
  40     $send_message = "/etc/adduser.message"; # send message to new user
  41     $send_message_bak = '/etc/adduser.message';
  42     $config = "/etc/adduser.conf"; # config file for adduser
  43     $config_read = 1;           # read config file
  44     $logfile = "/var/log/adduser"; # logfile
  45     $home = "/home";            # default HOME
  46     $etc_shells = "/etc/shells";
  47     $etc_passwd = "/etc/master.passwd";
  48     $group = "/etc/group";
  49     @pwd_mkdb = qw(pwd_mkdb -p); # program for building passwd database
  50
  51
  52     # List of directories where shells located
  53     @path = ('/bin', '/usr/bin', '/usr/local/bin');
  54     # common shells, first element has higher priority
  55     @shellpref = ('csh', 'sh', 'bash', 'tcsh', 'ksh');
  56
  57     $defaultshell = 'sh';       # defaultshell if not empty
  58     $group_uniq = 'USER';
  59     $defaultgroup = $group_uniq;# login groupname, $group_uniq means username
  60     $defaultclass = '';
  61
  62     $uid_start = 1000;          # new users get this uid
  63     $uid_end   = 32000;         # max. uid
  64
  65     # global variables
  66     # passwd
  67     $username = '';             # $username{username} = uid
  68     $uid = '';                  # $uid{uid} = username
  69     $pwgid = '';                # $pwgid{pwgid} = username; gid from passwd db
  70
  71     $password = '';             # password for new users
  72     $usepassword = '';            # use password-based auth
  73     $useemptypassword = '';       # use an empty password
  74     $enableaccount = '';        # enable or disable account password at creation
  75
  76     # group
  77     $groupname ='';             # $groupname{groupname} = gid
  78     $groupmembers = '';         # $groupmembers{gid} = members of group/kommalist
  79     $gid = '';                  # $gid{gid} = groupname;    gid form group db
  80     @group_comments;            # Comments in the group file
  81
  82     # shell
  83     $shell = '';                # $shell{`basename sh`} = sh
  84
  85     umask 022;                  # don't give login group write access
  86
  87     $ENV{'PATH'} = "/sbin:/bin:/usr/sbin:/usr/bin";
  88     @passwd_backup = '';
  89     @group_backup = '';
  90     @message_buffer = '';
  91     @user_variable_list = '';   # user variables in /etc/adduser.conf
  92     $do_not_delete = '## DO NOT DELETE THIS LINE!';
  93 }
  94
  95 # read shell database, see also: shells(5)
  96 sub shells_read {
  97     local($sh);
  98     local($err) = 0;
  99
 100     print "Check $etc_shells\n" if $verbose;
 101     open(S, $etc_shells) || die "$etc_shells:$!\n";
 102
 103     while(<S>) {
 104         if (/^\s*\//) {
 105             s/^\s*//; s/\s+.*//; # chop
 106             $sh = $_;
 107             if (-x  $sh) {
 108                 $shell{&basename($sh)} = $sh;
 109             } else {
 110                 warn "Shell: $sh not executable!\n";
 111                 $err++;
 112             }
 113         }
 114     }
 115
 116     # Allow /nonexistent and /bin/date as a valid shell for system utils
 117     push(@list, "/nonexistent");
 118     push(@shellpref, "no") if !grep(/^no$/, @shellpref);
 119     $shell{"no"} = "/nonexistent";
 120
 121     push(@list, "/bin/date");
 122     push(@shellpref, "date") if !grep(/^date$/, @shellpref);
 123     $shell{"date"} = "/bin/date";
 124
 125     return $err;
 126 }
 127
 128 # add new shells if possible
 129 sub shells_add {
 130     local($sh,$dir,@list);
 131
 132     return 1 unless $verbose;
 133
 134     foreach $sh (@shellpref) {
 135         # all known shells
 136         if (!$shell{$sh}) {
 137             # shell $sh is not defined as login shell
 138             foreach $dir (@path) {
 139                 if (-x "$dir/$sh") {
 140                     # found shell
 141                     if (&confirm_yn("Found shell: $dir/$sh. Add to $etc_shells?", "yes")) {
 142                         push(@list, "$dir/$sh");
 143                         push(@shellpref, "$sh");
 144                         $shell{&basename("$dir/$sh")} = "$dir/$sh";
 145                         $changes++;
 146                     }
 147                 }
 148             }
 149         }
 150     }
 151     &append_file($etc_shells, @list) if $#list >= 0;
 152 }
 153
 154 # choose your favourite shell and return the shell
 155 sub shell_default {
 156     local($e,$i,$new_shell);
 157     local($sh);
 158
 159     $sh = &shell_default_valid($defaultshell);
 160     return $sh unless $verbose;
 161
 162     $new_shell = &confirm_list("Enter your default shell:", 0,
 163                        $sh, sort(keys %shell));
 164     print "Your default shell is: $new_shell -> $shell{$new_shell}\n";
 165     $changes++ if $new_shell ne $sh;
 166     return $new_shell;
 167 }
 168
 169 sub shell_default_valid {
 170     local($sh) = @_;
 171     local($s,$e);
 172
 173     return $sh if $shell{$sh};
 174
 175     foreach $e (@shellpref) {
 176         $s = $e;
 177         last if defined($shell{$s});
 178     }
 179     $s = "sh" unless $s;
 180     warn "Shell ``$sh'' is undefined, use ``$s''\n";
 181     return $s;
 182 }
 183
 184 # return default home partition (e.g. "/home")
 185 # create base directory if nesseccary
 186 sub home_partition {
 187     local($home) = @_;
 188     $home = &stripdir($home);
 189     local($h) = $home;
 190
 191     return $h if !$verbose && $h eq &home_partition_valid($h);
 192
 193     while(1) {
 194         $h = &confirm_list("Enter your default HOME partition:", 1, $home, "");
 195         $h = &stripdir($h);
 196         last if $h eq &home_partition_valid($h);
 197     }
 198
 199     $changes++ if $h ne $home;
 200     return $h;
 201 }
 202
 203 sub home_partition_valid {
 204     local($h) = @_;
 205
 206     $h = &stripdir($h);
 207     # all right (I hope)
 208     return $h if $h =~ "^/" && -e $h && -w $h && (-d $h || -l $h);
 209
 210     # Errors or todo
 211     if ($h !~ "^/") {
 212         warn "Please use absolute path for home: ``$h''.\a\n";
 213         return 0;
 214     }
 215
 216     if (-e $h) {
 217         warn "$h exists, but is not a directory or symlink!\n"
 218             unless -d $h || -l $h;
 219         warn "$h is not writable!\n"
 220             unless -w $h;
 221         return 0;
 222     } else {
 223         # create home partition
 224         return $h if &mkdir_home($h);
 225     }
 226     return 0;
 227 }
 228
 229 # check for valid passwddb
 230 sub passwd_check {
 231     system(@pwd_mkdb, '-C', $etc_passwd);
 232     die "\nInvalid $etc_passwd - cannot add any users!\n" if $?;
 233 }
 234
 235 # read /etc/passwd
 236 sub passwd_read {
 237     local($p_username, $pw, $p_uid, $p_gid, $sh, %shlist);
 238
 239     print "Check $etc_passwd\n" if $verbose;
 240     open(P, "$etc_passwd") || die "$etc_passwd: $!\n";
 241
 242     while(<P>) {
 243         chop;
 244         push(@passwd_backup, $_);
 245         # ignore comments
 246         next if /^\s*$/;
 247         next if /^\s*#/;
 248
 249         ($p_username, $pw, $p_uid, $p_gid, $sh) = (split(/:/, $_))[0..3,9];
 250
 251         print "$p_username already exists with uid: $username{$p_username}!\n"
 252             if $username{$p_username} && $verbose;
 253         $username{$p_username} = $p_uid;
 254         print "User $p_username: uid $p_uid exists twice: $uid{$p_uid}\n"
 255             if $uid{$p_uid} && $verbose && $p_uid;    # don't warn for uid 0
 256         print "User $p_username: illegal shell: ``$sh''\n"
 257             if ($verbose && $sh &&
 258                 !$shell{&basename($sh)} &&
 259                 $p_username !~ /^(news|xten|bin|nobody|uucp)$/ &&
 260                 $sh !~ /\/(pppd|sliplogin|nologin|nonexistent)$/);
 261         $uid{$p_uid} = $p_username;
 262         $pwgid{$p_gid} = $p_username;
 263     }
 264     close P;
 265 }
 266
 267 # read /etc/group
 268 sub group_read {
 269     local($g_groupname,$pw,$g_gid, $memb);
 270
 271     print "Check $group\n" if $verbose;
 272     open(G, "$group") || die "$group: $!\n";
 273     while(<G>) {
 274         chop;
 275         push(@group_backup, $_);
 276         # Ignore empty lines
 277         next if /^\s*$/;
 278         # Save comments to restore later
 279         if (/^\s*\#/) {
 280             push(@group_comments, $_);
 281             next;
 282         }
 283
 284         ($g_groupname, $pw, $g_gid, $memb) = (split(/:/, $_))[0..3];
 285
 286         $groupmembers{$g_gid} = $memb;
 287         warn "Groupname exists twice: $g_groupname:$g_gid ->  $g_groupname:$groupname{$g_groupname}\n"
 288             if $groupname{$g_groupname} && $verbose;
 289         $groupname{$g_groupname} = $g_gid;
 290         warn "Groupid exists twice:   $g_groupname:$g_gid -> $gid{$g_gid}:$g_gid\n"
 291             if $gid{$g_gid} && $verbose;
 292         $gid{$g_gid} = $g_groupname;
 293     }
 294     close G;
 295 }
 296
 297 # check gids /etc/passwd <-> /etc/group
 298 sub group_check {
 299     local($c_gid, $c_username, @list);
 300
 301     foreach $c_gid (keys %pwgid) {
 302         if (!$gid{$c_gid}) {
 303             $c_username = $pwgid{$c_gid};
 304             warn "User ``$c_username'' has gid $c_gid but a group with this " .
 305                 "gid does not exist.\n" if $verbose;
 306         }
 307     }
 308 }
 309
 310 #
 311 # main loop for creating new users
 312 #
 313
 314 # return username
 315 sub new_users_name {
 316     local($name);
 317
 318     while(1) {
 319         $name = &confirm_list("Enter username", 1, $usernameregexp, "");
 320         if (length($name) > 16) {
 321             warn "Username is longer than 16 chars\a\n";
 322             next;
 323         }
 324         last if (&new_users_name_valid($name));
 325     }
 326     return $name;
 327 }
 328
 329 sub new_users_name_valid {
 330     local($name) = @_;
 331
 332     if ($name eq $usernameregexp) { # user/admin just pressed <Return>
 333         warn "Please enter a username\a\n";
 334         return 0;
 335     } elsif ($name =~ /[:\n]/) {
 336         warn "Username cannot contain colon or newline characters.\a\n";
 337         return 0;
 338     } elsif ($name !~ /$usernameregexp/) {
 339         if ($usernameregexp eq $defaultusernameregexp) {
 340             warn "Illegal username.\n" .
 341                 "Please use only lowercase Roman, decimal, underscore, " .
 342                 "or hyphen characters.\n" .
 343                 "Additionally, a username should not start with a hyphen.\a\n";
 344         } else {
 345             warn "Username doesn't match the regexp /$usernameregexp/\a\n";
 346         }
 347         return 0;
 348     } elsif ($username{$name}) {
 349         warn "Username ``$name'' already exists!\a\n"; return 0;
 350     }
 351     return 1;
 352 }
 353
 354 # return full name
 355 sub new_users_fullname {
 356     local($name) = @_;
 357     local($fullname);
 358
 359     while(1) {
 360         $fullname = &confirm_list("Enter full name", 1, "", "");
 361         last if $fullname eq &new_users_fullname_valid($fullname);
 362     }
 363     $fullname = $name unless $fullname;
 364     return $fullname;
 365 }
 366
 367 sub new_users_fullname_valid {
 368     local($fullname) = @_;
 369
 370     return $fullname if $fullname !~ /:/;
 371
 372     warn "``:'' is not allowed!\a\n";
 373     return 0;
 374 }
 375
 376 # return shell (full path) for user
 377 sub new_users_shell {
 378     local($sh);
 379
 380     $sh = &confirm_list("Enter shell", 0, $defaultshell, keys %shell);
 381     return $shell{$sh};
 382 }
 383
 384 # return home (full path) for user
 385 # Note that the home path defaults to $home/$name for batch
 386 sub new_users_home {
 387     local($name) = @_;
 388     local($userhome);
 389
 390     while(1) {
 391         $userhome = &confirm_list("Enter home directory (full path)", 1, "$home/$name", "");
 392         last if $userhome =~ /^\//;
 393         warn qq{Home directory "$userhome" is not a full path\a\n};
 394     }
 395     return $userhome;
 396 }
 397
 398 # return free uid and gid
 399 sub new_users_id {
 400     local($name) = @_;
 401     local($u_id, $g_id) = &next_id($name);
 402     local($u_id_tmp, $e);
 403
 404     while(1) {
 405         $u_id_tmp = &confirm_list("Uid", 1, $u_id, "");
 406         last if $u_id_tmp =~ /^[0-9]+$/ && $u_id_tmp <= $uid_end &&
 407                 ! $uid{$u_id_tmp};
 408         if ($uid{$u_id_tmp}) {
 409             warn "Uid ``$u_id_tmp'' in use!\a\n";
 410             $uid_start = $u_id_tmp;
 411             ($u_id, $g_id) = &next_id($name);
 412             next;
 413         } else {
 414             warn "Wrong uid.\a\n";
 415         }
 416     }
 417     # use calculated uid
 418     # return ($u_id_tmp, $g_id) if $u_id_tmp eq $u_id;
 419     # recalculate gid
 420     $uid_start = $u_id_tmp;
 421     return &next_id($name);
 422 }
 423
 424 # return login class for user
 425 sub new_users_class {
 426     local($def) = @_;
 427     local($class);
 428
 429     $class = &confirm_list("Enter login class:", 1, $def, ($def, "default"));
 430     $class = "" if $class eq "default";
 431     return $class;
 432 }
 433
 434 # add user to group
 435 sub add_group {
 436     local($gid, $name) = @_;
 437
 438     return 0 if
 439         $groupmembers{$gid} =~ /^(.+,)?$name(,.+)?$/;
 440
 441     $groupmembers_bak{$gid} = $groupmembers{$gid};
 442     $groupmembers{$gid} .= "," if $groupmembers{$gid};
 443     $groupmembers{$gid} .= "$name";
 444
 445     return $name;
 446 }
 447
 448
 449 # return login group
 450 sub new_users_grplogin {
 451     local($name, $defaultgroup, $new_users_ok) = @_;
 452     local($group_login, $group);
 453
 454     $group = $name;
 455     $group = $defaultgroup if $defaultgroup ne $group_uniq;
 456
 457     if ($new_users_ok) {
 458         # clean up backup
 459         foreach $e (keys %groupmembers_bak) { delete $groupmembers_bak{$e}; }
 460     } else {
 461         # restore old groupmembers, user was not accept
 462         foreach $e (keys %groupmembers_bak) {
 463             $groupmembers{$e} = $groupmembers_bak{$e};
 464         }
 465     }
 466
 467     while(1) {
 468         $group_login = &confirm_list("Login group", 1, $group,
 469                                      ($name, $group));
 470         last if $group_login eq $group;
 471         last if $group_login eq $name;
 472         last if defined $groupname{$group_login};
 473         if ($group_login eq $group_uniq) {
 474             $group_login = $name; last;
 475         }
 476
 477         if (defined $gid{$group_login}) {
 478             # convert numeric groupname (gid) to groupname
 479             $group_login = $gid{$group_login};
 480             last;
 481         }
 482         warn "Group does not exist!\a\n";
 483     }
 484
 485     #if (defined($groupname{$group_login})) {
 486     #   &add_group($groupname{$group_login}, $name);
 487     #}
 488
 489     return ($group_login, $group_uniq) if $group_login eq $name;
 490     return ($group_login, $group_login);
 491 }
 492
 493 # return other groups (string)
 494 sub new_users_groups {
 495     local($name, $other_groups) = @_;
 496     local($string) =
 497         "Login group is ``$group_login''. Invite $name into other groups:";
 498     local($e, $flag);
 499     local($new_groups,$groups);
 500
 501     $other_groups = "no" unless $other_groups;
 502
 503     while(1) {
 504         $groups = &confirm_list($string, 1, $other_groups,
 505                                 ("no", $other_groups, "guest"));
 506         # no other groups
 507         return "" if $groups eq "no";
 508
 509         ($flag, $new_groups) = &new_users_groups_valid($groups);
 510         last unless $flag;
 511     }
 512     $new_groups =~ s/\s*$//;
 513     return $new_groups;
 514 }
 515
 516 sub new_users_groups_valid {
 517     local($groups) = @_;
 518     local($e, $new_groups);
 519     local($flag) = 0;
 520
 521     foreach $e (split(/[,\s]+/, $groups)) {
 522         # convert numbers to groupname
 523         if ($e =~ /^[0-9]+$/ && $gid{$e}) {
 524             $e = $gid{$e};
 525         }
 526         if (defined($groupname{$e})) {
 527             if ($e eq $group_login) {
 528                 # do not add user to a group if this group
 529                 # is also the login group.
 530             } elsif (&add_group($groupname{$e}, $name)) {
 531                 $new_groups .= "$e ";
 532             } else {
 533                 warn "$name is already member of group ``$e''\n";
 534             }
 535         } else {
 536             warn "Group ``$e'' does not exist\a\n"; $flag++;
 537         }
 538     }
 539     return ($flag, $new_groups);
 540 }
 541
 542 # your last change
 543 sub new_users_ok {
 544     local ($newpasswd);
 545     # Note that we either show "password disabled" or
 546     # "****" .. we don't show "empty password" since
 547     # the whole point of starring out the password in
 548     # the first place is to stop people looking over your
 549     # shoulder and seeing the password.. -- adrian
 550     if ($usepassword eq "no") {
 551         $newpasswd = "Password disabled";
 552     } elsif ($enableaccount eq "no") {
 553         $newpasswd = "Password disabled";
 554     } else {
 555         $newpasswd = "****";
 556     }
 557
 558     print <<EOF;
 559
 560 Name:     $name
 561 Password: $newpasswd
 562 Fullname: $fullname
 563 Uid:      $u_id
 564 Gid:      $g_id ($group_login)
 565 Class:    $class
 566 Groups:   $group_login $new_groups
 567 HOME:     $userhome
 568 Shell:    $sh
 569 EOF
 570
 571     return &confirm_yn("OK?", "yes");
 572 }
 573
 574 # make password database
 575 sub new_users_pwdmkdb {
 576     local($last) = shift;
 577     local($name) = shift;
 578
 579     system(@pwd_mkdb, '-u', $name, $etc_passwd);
 580     if ($?) {
 581         warn "$last\n";
 582         warn "``@pwd_mkdb'' failed\n";
 583         exit($? >> 8);
 584     }
 585 }
 586
 587 # update group database
 588 sub new_users_group_update {
 589     local($e, @a);
 590
 591     # Add *new* group
 592     if (!defined($groupname{$group_login}) &&
 593         !defined($gid{$groupname{$group_login}})) {
 594         push(@group_backup, "$group_login:*:$g_id:");
 595         $groupname{$group_login} = $g_id;
 596         $gid{$g_id} = $group_login;
 597         # $groupmembers{$g_id} = $group_login;
 598     }
 599
 600     if ($new_groups || defined($groupname{$group_login}) ||
 601         defined($gid{$groupname{$group_login}}) &&
 602                 $gid{$groupname{$group_login}} ne "+") {
 603         # new user is member of some groups
 604         # new login group is already in name space
 605         rename($group, "$group.bak");
 606         #warn "$group_login $groupname{$group_login} $groupmembers{$groupname{$group_login}}\n";
 607
 608         # Restore comments from the top of the group file
 609         @a = @group_comments;
 610         foreach $e (sort {$a <=> $b} (keys %gid)) {
 611             push(@a, "$gid{$e}:*:$e:$groupmembers{$e}");
 612         }
 613         &append_file($group, @a);
 614     } else {
 615         &append_file($group, "$group_login:*:$g_id:");
 616     }
 617
 618 }
 619
 620 sub new_users_passwd_update {
 621     # update passwd/group variables
 622     push(@passwd_backup, $new_entry);
 623     $username{$name} = $u_id;
 624     $uid{$u_id} = $name;
 625     $pwgid{$g_id} = $name;
 626 }
 627
 628 # send message to new user
 629 sub new_users_sendmessage {
 630     return 1 if $send_message eq "no";
 631
 632     local($cc) =
 633         &confirm_list("Send message to ``$name'' and:",
 634                       1, "no", ("root", "second_mail_address", "no"));
 635     local($e);
 636     $cc = "" if $cc eq "no";
 637
 638     foreach $e (@message_buffer) {
 639         print eval "\"$e\"";
 640     }
 641     print "\n";
 642
 643     local(@message_buffer_append) = ();
 644     if (!&confirm_yn("Add anything to default message", "no")) {
 645         print "Use ``.'' or ^D alone on a line to finish your message.\n";
 646         push(@message_buffer_append, "\n");
 647         while($read = <STDIN>) {
 648             last if $read eq "\.\n";
 649             push(@message_buffer_append, $read);
 650         }
 651     }
 652
 653     &sendmessage("$name $cc", (@message_buffer, @message_buffer_append))
 654         if (&confirm_yn("Send message", "yes"));
 655 }
 656
 657 sub sendmessage {
 658     local($to, @message) = @_;
 659     local($e);
 660
 661     if (!open(M, "| mail -s Welcome $to")) {
 662         warn "Cannot send mail to: $to!\n";
 663         return 0;
 664     } else {
 665         foreach $e (@message) {
 666             print M eval "\"$e\"";
 667         }
 668         close M;
 669     }
 670 }
 671
 672
 673 sub new_users_password {
 674
 675     local($password);
 676
 677     while(1) {
 678         system("stty -echo");
 679         $password = &confirm_list("Enter password", 1, "", "");
 680         system("stty echo");
 681         print "\n";
 682         if ($password ne "") {
 683             system("stty -echo");
 684             $newpass = &confirm_list("Enter password again", 1, "", "");
 685             system("stty echo");
 686             print "\n";
 687             last if $password eq $newpass;
 688             print "They didn't match, please try again\n";
 689         }
 690         elsif (&confirm_yn("Use an empty password?", "yes")) {
 691             last;
 692         }
 693     }
 694
 695     return $password;
 696 }
 697
 698 sub new_users_use_password {
 699     local ($p) = $defaultusepassword;
 700     $p = &confirm_yn("Use password-based authentication", $defaultusepassword);
 701     return "yes" if (($defaultusepassword eq "yes" && $p) ||
 702                      ($defaultusepassword eq "no" && !$p));
 703     return "no";    # otherwise
 704 }
 705
 706 sub new_users_enable_account {
 707     local ($p) = $defaultenableaccount;
 708     $p = &confirm_yn("Enable account password at creation", $defaultenableaccount);
 709     return "yes" if (($defaultenableaccount eq "yes" && $p) ||
 710                      ($defaultenableaccount eq "no" && !$p));
 711     return "no";    # otherwise
 712 }
 713
 714 sub new_users_empty_password {
 715     local ($p) = $defaultemptypassword;
 716     $p = &confirm_yn("Use an empty password", $defaultemptypassword);
 717     return "yes" if (($defaultemptypassword eq "yes" && $p) ||
 718                      ($defaultemptypassword eq "no" && !$p));
 719     return "no";    # otherwise
 720 }
 721
 722 sub new_users {
 723
 724     print "\n" if $verbose;
 725     print "Ok, let's go.\n" .
 726           "Don't worry about mistakes. I will give you the chance later to " .
 727           "correct any input.\n" if $verbose;
 728
 729     # name: Username
 730     # fullname: Full name
 731     # sh: shell
 732     # userhome: home path for user
 733     # u_id: user id
 734     # g_id: group id
 735     # class: login class
 736     # group_login: groupname of g_id
 737     # new_groups: some other groups
 738     local($name, $group_login, $fullname, $sh, $u_id, $g_id, $class, $new_groups);
 739     local($userhome);
 740     local($groupmembers_bak, $cryptpwd);
 741     local($new_users_ok) = 1;
 742
 743
 744     $new_groups = "no";
 745     $new_groups = "no" unless $groupname{$new_groups};
 746
 747     while(1) {
 748         $name = &new_users_name;
 749         $fullname = &new_users_fullname($name);
 750         $sh = &new_users_shell;
 751         $userhome = &new_users_home($name);
 752         ($u_id, $g_id) = &new_users_id($name);
 753         $class = &new_users_class($defaultclass);
 754         ($group_login, $defaultgroup) =
 755             &new_users_grplogin($name, $defaultgroup, $new_users_ok);
 756         # do not use uniq username and login group
 757         $g_id = $groupname{$group_login} if (defined($groupname{$group_login}));
 758
 759
 760         # The tricky logic:
 761         # If $usepasswd is 0, we use a * as a password
 762         # If $usepasswd is 1, then
 763         #   if $enableaccount is 0, we prepend * as a password
 764         #     else if $enableaccount is 1 we don't prepend anything
 765         #   if $useemptypassword is 0 we ask for a password,
 766         #     else we use a blank one
 767         #
 768         # The logic is tasty, I'll give you that, but its flexible and
 769         # it'll stop people shooting themselves in the foot.
 770
 771         $new_groups = &new_users_groups($name, $new_groups);
 772
 773         $usepassword = &new_users_use_password;
 774         if ($usepassword eq "no") {
 775             # note that the assignments to enableaccount and
 776             # useemptypassword functionally do the same as
 777             # usepasswd == "no". Just for consistency.
 778             $password = "";    # no password!
 779             $enableaccount = "no"; # doesn't matter here
 780             $useemptypassword = "yes"; # doesn't matter here
 781         } else {
 782             $useemptypassword = &new_users_empty_password;
 783             if ($useemptypassword eq "no") {
 784                 $password = &new_users_password;
 785             }
 786             $enableaccount = &new_users_enable_account;
 787         }
 788
 789         if (&new_users_ok) {
 790             $new_users_ok = 1;
 791
 792             $cryptpwd = "";
 793             $cryptpwd = crypt($password, &salt) if $password ne "";
 794
 795             if ($usepassword eq "no") {
 796                 $cryptpwd = "*";
 797             } else {
 798                 # cryptpwd is valid before this if mess, so if
 799                 # blankpasswd is no we don't blank the cryptpwd
 800                 if ($useemptypassword eq "yes") {
 801                     $cryptpwd = "";
 802                 }
 803                 if ($enableaccount eq "no") {
 804                     $cryptpwd = "*" . $cryptpwd;
 805                 }
 806             }
 807             # obscure perl bug
 808             $new_entry = "$name\:" . "$cryptpwd" .
 809                 "\:$u_id\:$g_id\:$class\:0:0:$fullname:$userhome:$sh";
 810             &append_file($etc_passwd, "$new_entry");
 811             &new_users_pwdmkdb("$new_entry", $name);
 812             &new_users_group_update;
 813             &new_users_passwd_update;  print "Added user ``$name''\n";
 814             &new_users_sendmessage;
 815             &adduser_log("$name:*:$u_id:$g_id($group_login):$fullname");
 816             &home_create($userhome, $name, $group_login);
 817         } else {
 818             $new_users_ok = 0;
 819         }
 820         if (!&confirm_yn("Add another user?", "yes")) {
 821             print "Goodbye!\n" if $verbose;
 822             last;
 823         }
 824         print "\n" if !$verbose;
 825     }
 826 }
 827
 828 # ask for password usage
 829 sub password_default {
 830     local($p) = $defaultusepassword;
 831     if ($verbose) {
 832         $p = &confirm_yn("Use password-based authentication", $defaultusepassword);
 833         $changes++ unless $p;
 834     }
 835     return "yes" if (($defaultusepassword eq "yes" && $p) ||
 836                      ($defaultusepassword eq "no" && !$p));
 837     return "no";    # otherwise
 838 }
 839
 840 # ask for account enable usage
 841 sub enable_account_default {
 842     local ($p) = $defaultenableaccount;
 843     if ($verbose) {
 844         $p = &confirm_yn("Enable account password at creation", $defaultenableaccount);
 845         $changes++ unless $p;
 846     }
 847     return "yes" if (($defaultenableaccount eq "yes" && $p) ||
 848                      ($defaultenableaccount eq "no" && !$p));
 849     return "no";    # otherwise
 850 }
 851
 852 # ask for empty password
 853 sub enable_empty_password {
 854     local ($p) = $defaultemptypassword;
 855     if ($verbose) {
 856         $p = &confirm_yn("Use an empty password", $defaultemptypassword);
 857         $changes++ unless $p;
 858     }
 859     return "yes" if (($defaultemptypassword eq "yes" && $p) ||
 860                      ($defaultemptypassword eq "no" && !$p));
 861     return "no"; # otherwise
 862 }
 863
 864 # misc
 865 sub check_root {
 866     die "You are not root!\n" if $< && !$test;
 867 }
 868
 869 sub usage {
 870     warn <<USAGE;
 871 usage: adduser
 872     [-check_only]
 873     [-class login_class]
 874     [-config_create]
 875     [-dotdir dotdir]
 876     [-group login_group]
 877     [-h|-help]
 878     [-home home]
 879     [-message message_file]
 880     [-noconfig]
 881     [-shell shell]
 882     [-s|-silent|-q|-quiet]
 883     [-uid uid_start]
 884     [-v|-verbose]
 885
 886 home=$home shell=$defaultshell dotdir=$dotdir login_group=$defaultgroup
 887 login_class=$defaultclass message_file=$send_message uid_start=$uid_start
 888 USAGE
 889     exit 1;
 890 }
 891
 892 # uniq(1)
 893 sub uniq {
 894     local(@list) = @_;
 895     local($e, $last, @array);
 896
 897     foreach $e (sort @list) {
 898         push(@array, $e) unless $e eq $last;
 899         $last = $e;
 900     }
 901     return @array;
 902 }
 903
 904 # see /usr/src/usr.bin/passwd/local_passwd.c or librcypt, crypt(3)
 905 sub salt {
 906     local($salt);               # initialization
 907     local($i, $rand);
 908     local(@itoa64) = ( '0' .. '9', 'a' .. 'z', 'A' .. 'Z' ); # 0 .. 63
 909
 910     warn "calculate salt\n" if $verbose > 1;
 911     # to64
 912     for ($i = 0; $i < 27; $i++) {
 913         srand(time + $rand + $$);
 914         $rand = rand(25*29*17 + $rand);
 915         $salt .=  $itoa64[$rand & $#itoa64];
 916     }
 917     warn "Salt is: $salt\n" if $verbose > 1;
 918
 919     return $salt;
 920 }
 921
 922
 923 # print banner
 924 sub copyright {
 925     return;
 926 }
 927
 928 # hints
 929 sub hints {
 930     if ($verbose) {
 931         print "Use option ``-silent'' if you don't want to see " .
 932               "all warnings and questions.\n\n";
 933     } else {
 934         print "Use option ``-verbose'' if you want to see more warnings and " .
 935               "questions \nor try to repair bugs.\n\n";
 936     }
 937 }
 938
 939 #
 940 sub parse_arguments {
 941     local(@argv) = @_;
 942
 943     while ($_ = $argv[0], /^-/) {
 944         shift @argv;
 945         last if /^--$/;
 946         if    (/^--?(v|verbose)$/)      { $verbose = 1 }
 947         elsif (/^--?(s|silent|q|quiet)$/)  { $verbose = 0 }
 948         elsif (/^--?(debug)$/)      { $verbose = 2 }
 949         elsif (/^--?(h|help|\?)$/)      { &usage }
 950         elsif (/^--?(home)$/)    { $home = $argv[0]; shift @argv }
 951         elsif (/^--?(shell)$/)   { $defaultshell = $argv[0]; shift @argv }
 952         elsif (/^--?(dotdir)$/)  { $dotdir = $argv[0]; shift @argv }
 953         elsif (/^--?(uid)$/)     { $uid_start = $argv[0]; shift @argv }
 954         elsif (/^--?(class)$/)   { $defaultclass = $argv[0]; shift @argv }
 955         elsif (/^--?(group)$/)   { $defaultgroup = $argv[0]; shift @argv }
 956         elsif (/^--?(check_only)$/) { $check_only = 1 }
 957         elsif (/^--?(message)$/) { $send_message = $argv[0]; shift @argv;
 958                                    $sendmessage = 1; }
 959         elsif (/^--?(batch)$/)   {
 960             warn "The -batch option is not supported anymore.\n",
 961             "Please use the pw(8) command line tool!\n";
 962             exit(0);
 963         }
 964         # see &config_read
 965         elsif (/^--?(config_create)$/)  { &create_conf; }
 966         elsif (/^--?(noconfig)$/)       { $config_read = 0; }
 967         else                        { &usage }
 968     }
 969     #&usage if $#argv < 0;
 970 }
 971
 972 sub basename {
 973     local($name) = @_;
 974     $name =~ s|/+$||;
 975     $name =~ s|.*/+||;
 976     return $name;
 977 }
 978
 979 sub dirname {
 980     local($name) = @_;
 981     $name = &stripdir($name);
 982     $name =~ s|/+[^/]+$||;
 983     $name = "/" unless $name;   # dirname of / is /
 984     return $name;
 985 }
 986
 987 # return 1 if $file is a readable file or link
 988 sub filetest {
 989     local($file, $verb) = @_;
 990
 991     if (-e $file) {
 992         if (-f $file || -l $file) {
 993             return 1 if -r _;
 994             warn "$file unreadable\n" if $verbose;
 995         } else {
 996             warn "$file is not a plain file or link\n" if $verbose;
 997         }
 998     }
 999     return 0;
1000 }
1001
1002 # create configuration files and exit
1003 sub create_conf {
1004     $create_conf = 1;
1005     if ($send_message ne 'no') {
1006         &message_create($send_message);
1007     } else {
1008         &message_create($send_message_bak);
1009     }
1010     &config_write(1);
1011     exit(0);
1012 }
1013
1014 # log for new user in /var/log/adduser
1015 sub adduser_log {
1016     local($string) = @_;
1017     local($e);
1018
1019     return 1 if $logfile eq "no";
1020
1021     local($sec, $min, $hour, $mday, $mon, $year) = localtime;
1022     $year += 1900;
1023     $mon++;
1024
1025     foreach $e ('sec', 'min', 'hour', 'mday', 'mon', 'year') {
1026         # '7' -> '07'
1027         eval "\$$e = 0 . \$$e" if (eval "\$$e" < 10);
1028     }
1029
1030     &append_file($logfile, "$year/$mon/$mday $hour:$min:$sec $string");
1031 }
1032
1033 # create HOME directory, copy dotfiles from $dotdir to $HOME
1034 sub home_create {
1035     local($homedir, $name, $group) = @_;
1036     local($rootdir);
1037
1038     if (-e "$homedir") {
1039         warn "HOME Directory ``$homedir'' already exist\a\n";
1040         return 0;
1041     }
1042
1043     # if the home directory prefix doesn't exist, create it
1044     # First, split the directory into a list; then remove the user's dir
1045     @dir = split('/', $homedir); pop(@dir);
1046     # Put back together & strip to get directory prefix
1047     $rootdir = &stripdir(join('/', @dir));
1048
1049     if (!&mkdirhier("$rootdir")) {
1050             # warn already displayed
1051             return 0;
1052     }
1053
1054     if ($dotdir eq 'no') {
1055         if (!mkdir("$homedir", 0755)) {
1056             warn "$dir: $!\n"; return 0;
1057         }
1058         system 'chown', "$name:$group", $homedir;
1059         return !$?;
1060     }
1061
1062     # copy files from  $dotdir to $homedir
1063     # rename 'dot.foo' files to '.foo'
1064     print "Copy files from $dotdir to $homedir\n" if $verbose;
1065     system('cp', '-R', $dotdir, $homedir);
1066     system('chmod', '-R', 'u+wrX,go-w', $homedir);
1067     system('chown', '-Rh', "$name:$group", $homedir);
1068
1069     # security
1070     opendir(D, $homedir);
1071     foreach $file (readdir(D)) {
1072         if ($file =~ /^dot\./ && -f "$homedir/$file") {
1073             $file =~ s/^dot\././;
1074             rename("$homedir/dot$file", "$homedir/$file");
1075         }
1076         chmod(0600, "$homedir/$file")
1077             if ($file =~ /^\.(rhosts|Xauthority|kermrc|netrc)$/);
1078         chmod(0700, "$homedir/$file")
1079             if ($file =~ /^(Mail|prv|\.(iscreen|term))$/);
1080     }
1081     closedir D;
1082     return 1;
1083 }
1084
1085 # makes a directory hierarchy
1086 sub mkdir_home {
1087     local($dir) = @_;
1088     $dir = &stripdir($dir);
1089     local($user_partition) = "/usr";
1090     local($dirname) = &dirname($dir);
1091
1092     -e $dirname || &mkdirhier($dirname);
1093
1094     if (((stat($dirname))[0]) == ((stat("/"))[0])){
1095         # home partition is on root partition
1096         # create home partition on $user_partition and make
1097         # a symlink from $dir to $user_partition/`basename $dir`
1098         # For instance: /home -> /usr/home
1099
1100         local($basename) = &basename($dir);
1101         local($d) = "$user_partition/$basename";
1102
1103
1104         if (-d $d) {
1105             warn "Oops, $d already exist\n" if $verbose;
1106         } else {
1107             print "Create $d\n" if $verbose;
1108             if (!mkdir("$d", 0755)) {
1109                 warn "$d: $!\a\n"; return 0;
1110             }
1111         }
1112
1113         unlink($dir);           # symlink to nonexist file
1114         print "Create symlink: $dir -> $d\n" if $verbose;
1115         if (!symlink("$d", $dir)) {
1116             warn "Symlink $d: $!\a\n"; return 0;
1117         }
1118     } else {
1119         print "Create $dir\n" if $verbose;
1120         if (!mkdir("$dir", 0755)) {
1121             warn "Directory ``$dir'': $!\a\n"; return 0;
1122         }
1123     }
1124     return 1;
1125 }
1126
1127 sub mkdirhier {
1128     local($dir) = @_;
1129     local($d,$p);
1130
1131     $dir = &stripdir($dir);
1132
1133     foreach $d (split('/', $dir)) {
1134         $dir = "$p/$d";
1135         $dir =~ s|^//|/|;
1136         if (! -e "$dir") {
1137             print "Create $dir\n" if $verbose;
1138             if (!mkdir("$dir", 0755)) {
1139                 warn "$dir: $!\n"; return 0;
1140             }
1141         }
1142         $p .= "/$d";
1143     }
1144     return 1;
1145 }
1146
1147 # stript unused '/'
1148 # F.i.: //usr///home// -> /usr/home
1149 sub stripdir {
1150     local($dir) = @_;
1151
1152     $dir =~ s|/+|/|g;           # delete double '/'
1153     $dir =~ s|/$||;             # delete '/' at end
1154     return $dir if $dir ne "";
1155     return '/';
1156 }
1157
1158 # Read one of the elements from @list. $confirm is default.
1159 # If !$allow accept only elements from @list.
1160 sub confirm_list {
1161     local($message, $allow, $confirm, @list) = @_;
1162     local($read, $c, $print);
1163
1164     $print = "$message" if $message;
1165     $print .= " " unless $message =~ /\n$/ || $#list == 0;
1166
1167     $print .= join($", &uniq(@list)); #"
1168     $print .= " " unless $message =~ /\n$/ && $#list == 0;
1169     print "$print";
1170     print "\n" if (length($print) + length($confirm)) > 60;
1171     print "[$confirm]: ";
1172
1173     chop($read = <STDIN>);
1174     $read =~ s/^\s*//;
1175     $read =~ s/\s*$//;
1176     return $confirm if $read eq "";
1177     return "$read" if $allow;
1178
1179     foreach $c (@list) {
1180         return $read if $c eq $read;
1181     }
1182     warn "$read: is not allowed!\a\n";
1183     return &confirm_list($message, $allow, $confirm, @list);
1184 }
1185
1186 # YES or NO question
1187 # return 1 if &confirm("message", "yes") and answer is yes
1188 #       or if &confirm("message", "no") an answer is no
1189 # otherwise 0
1190 sub confirm_yn {
1191     local($message, $confirm) = @_;
1192     local($yes) = '^(yes|YES|y|Y)$';
1193     local($no) = '^(no|NO|n|N)$';
1194     local($read, $c);
1195
1196     if ($confirm && ($confirm =~ "$yes" || $confirm == 1)) {
1197         $confirm = "y";
1198     } else {
1199         $confirm = "n";
1200     }
1201     print "$message (y/n) [$confirm]: ";
1202     chop($read = <STDIN>);
1203     $read =~ s/^\s*//;
1204     $read =~ s/\s*$//;
1205     return 1 unless $read;
1206
1207     if (($confirm eq "y" && $read =~ "$yes") ||
1208         ($confirm eq "n" && $read =~ "$no")) {
1209         return 1;
1210     }
1211
1212     if ($read !~ "$yes" && $read !~ "$no") {
1213         warn "Wrong value. Enter again!\a\n";
1214         return &confirm_yn($message, $confirm);
1215     }
1216     return 0;
1217 }
1218
1219 # allow configuring usernameregexp
1220 sub usernameregexp_default {
1221     local($r) = $usernameregexp;
1222
1223     while ($verbose) {
1224         $r = &confirm_list("Usernames must match regular expression:", 1,
1225             $r, "");
1226         eval "'foo' =~ /$r/";
1227         last unless $@;
1228         warn "Invalid regular expression\a\n";
1229     }
1230     $changes++ if $r ne $usernameregexp;
1231     return $r;
1232 }
1233
1234 # test if $dotdir exist
1235 # return "no" if $dotdir not exist or dotfiles should not copied
1236 sub dotdir_default {
1237     local($dir) = $dotdir;
1238
1239     return &dotdir_default_valid($dir) unless $verbose;
1240     while($verbose) {
1241         $dir = &confirm_list("Copy dotfiles from:", 1,
1242             $dir, ("no", $dotdir_bak, $dir));
1243         last if $dir eq &dotdir_default_valid($dir);
1244     }
1245     warn "Do not copy dotfiles.\n" if $verbose && $dir eq "no";
1246
1247     $changes++ if $dir ne $dotdir;
1248     return $dir;
1249 }
1250
1251 sub dotdir_default_valid {
1252     local($dir) = @_;
1253
1254     return $dir if (-e $dir && -r _ && (-d _ || -l $dir) && $dir =~ "^/");
1255     return $dir if $dir eq "no";
1256     warn "Dotdir ``$dir'' is not a directory\a\n";
1257     return "no";
1258 }
1259
1260 # ask for messages to new users
1261 sub message_default {
1262     local($file) = $send_message;
1263     local(@d) = ($file, $send_message_bak, "no");
1264
1265     while($verbose) {
1266         $file = &confirm_list("Send message from file:", 1, $file, @d);
1267         last if $file eq "no";
1268         last if &filetest($file, 1);
1269
1270         # maybe create message file
1271         &message_create($file) if &confirm_yn("Create ``$file''?", "yes");
1272         last if &filetest($file, 0);
1273         last if !&confirm_yn("File ``$file'' does not exist, try again?",
1274                              "yes");
1275     }
1276
1277     if ($file eq "no" || !&filetest($file, 0)) {
1278         warn "Do not send message\n" if $verbose;
1279         $file = "no";
1280     } else {
1281         &message_read($file);
1282     }
1283
1284     $changes++ if $file ne $send_message && $verbose;
1285     return $file;
1286 }
1287
1288 # create message file
1289 sub message_create {
1290     local($file) = @_;
1291
1292     rename($file, "$file.bak");
1293     if (!open(M, "> $file")) {
1294         warn "Messagefile ``$file'': $!\n"; return 0;
1295     }
1296     print M <<EOF;
1297 #
1298 # Message file for adduser(8)
1299 #   comment: ``#''
1300 #   default variables: \$name, \$fullname, \$password
1301 #   other variables:  see /etc/adduser.conf after
1302 #                    line  ``$do_not_delete''
1303 #
1304
1305 \$fullname,
1306
1307 your account ``\$name'' was created.
1308 Have fun!
1309
1310 See also chpass(1), finger(1), passwd(1)
1311 EOF
1312     close M;
1313     return 1;
1314 }
1315
1316 # read message file into buffer
1317 sub message_read {
1318     local($file) = @_;
1319     @message_buffer = '';
1320
1321     if (!open(R, "$file")) {
1322         warn "File ``$file'':$!\n"; return 0;
1323     }
1324     while(<R>) {
1325         push(@message_buffer, $_) unless /^\s*#/;
1326     }
1327     close R;
1328 }
1329
1330 # write @list to $file with file-locking
1331 sub append_file {
1332     local($file,@list) = @_;
1333     local($e);
1334     local($LOCK_EX) = 2;
1335     local($LOCK_NB) = 4;
1336     local($LOCK_UN) = 8;
1337
1338     open(F, ">> $file") || die "$file: $!\n";
1339     print "Lock $file.\n" if $verbose > 1;
1340     while(!flock(F, $LOCK_EX | $LOCK_NB)) {
1341         warn "Cannot lock file: $file\a\n";
1342         die "Sorry, give up\n"
1343             unless &confirm_yn("Try again?", "yes");
1344     }
1345     print F join("\n", @list) . "\n";
1346     close F;
1347     print "Unlock $file.\n" if $verbose > 1;
1348     flock(F, $LOCK_UN);
1349 }
1350
1351 # return free uid+gid
1352 # uid == gid if possible
1353 sub next_id {
1354     local($group) = @_;
1355
1356     $uid_start = 1000 if ($uid_start <= 0 || $uid_start >= $uid_end);
1357     # looking for next free uid
1358     while($uid{$uid_start}) {
1359         $uid_start++;
1360         $uid_start = 1000 if $uid_start >= $uid_end;
1361         print "$uid_start\n" if $verbose > 1;
1362     }
1363
1364     local($gid_start) = $uid_start;
1365     # group for user (username==groupname) already exist
1366     if ($groupname{$group}) {
1367         $gid_start = $groupname{$group};
1368     }
1369     # gid is in use, looking for another gid.
1370     # Note: uid an gid are not equal
1371     elsif ($gid{$uid_start}) {
1372         while($gid{$gid_start} || $uid{$gid_start}) {
1373             $gid_start--;
1374             $gid_start = $uid_end if $gid_start < 100;
1375         }
1376     }
1377     return ($uid_start, $gid_start);
1378 }
1379
1380 # read config file
1381 sub config_read {
1382     local($opt) = @_;
1383     local($user_flag) = 0;
1384
1385     # don't read config file
1386     return 1 if $opt =~ /-(noconfig|config_create)/ || !$config_read;
1387
1388     if(!open(C, "$config")) {
1389         warn "$config: $!\n"; return 0;
1390     }
1391
1392     while(<C>) {
1393         # user defined variables
1394         /^$do_not_delete/ && $user_flag++;
1395         # found @array or $variable
1396         if (s/^(\w+\s*=\s*\()/\@$1/ || s/^(\w+\s*=)/\$$1/) {
1397             eval $_;
1398             #warn "$_";
1399         }
1400         # lines with '^##' are not saved
1401         push(@user_variable_list, $_)
1402             if $user_flag && !/^##/ && (s/^[\$\@]// || /^[#\s]/);
1403     }
1404     #warn "X @user_variable_list X\n";
1405     close C;
1406 }
1407
1408
1409 # write config file
1410 sub config_write {
1411     local($silent) = @_;
1412
1413     # nothing to do
1414     return 1 unless ($changes || ! -e $config || !$config_read || $silent);
1415
1416     if (!$silent) {
1417         if (-e $config) {
1418             return 1 if &confirm_yn("\nWrite your changes to $config?", "no");
1419         } else {
1420             return 1 unless
1421                 &confirm_yn("\nWrite your configuration to $config?", "yes");
1422         }
1423     }
1424
1425     rename($config, "$config.bak");
1426     open(C, "> $config") || die "$config: $!\n";
1427
1428     # prepare some variables
1429     $send_message = "no" unless $send_message;
1430     $defaultusepassword = "no" unless $defaultusepassword;
1431     $defaultenableaccount = "yes" unless $defaultenableaccount;
1432     $defaultemptypassword = "no" unless $defaultemptypassword;
1433     local($shpref) = "'" . join("', '", @shellpref) . "'";
1434     local($shpath) = "'" . join("', '", @path) . "'";
1435     local($user_var) = join('', @user_variable_list);
1436
1437     print C <<EOF;
1438 #
1439 # $config - automatic generated by adduser(8)
1440 #
1441 # Note: adduser read *and* write this file.
1442 #       You may change values, but don't add new things before the
1443 #       line ``$do_not_delete''
1444 #
1445
1446 # verbose = [0-2]
1447 verbose = $verbose
1448
1449 # regular expression usernames are checked against (see perlre(1))
1450 # usernameregexp = 'regexp'
1451 usernameregexp = '$usernameregexp'
1452
1453 # use password-based authentication for new users
1454 # defaultusepassword =  "yes" | "no"
1455 defaultusepassword = "$defaultusepassword"
1456
1457 # enable account password at creation
1458 # (the password will be prepended with a star if the account isn't enabled)
1459 # defaultenableaccount = "yes" | "no"
1460 defaultenableaccount = "$defaultenableaccount"
1461
1462 # allow blank passwords
1463 # defaultemptypassword = "yes" | "no"
1464 defaultemptypassword = "$defaultemptypassword"
1465
1466 # copy dotfiles from this dir ("/usr/share/skel" or "no")
1467 dotdir = "$dotdir"
1468
1469 # send this file to new user ("/etc/adduser.message" or "no")
1470 send_message = "$send_message"
1471
1472 # config file for adduser ("/etc/adduser.conf")
1473 config = "$config"
1474
1475 # logfile ("/var/log/adduser" or "no")
1476 logfile = "$logfile"
1477
1478 # default HOME directory ("/home")
1479 home = "$home"
1480
1481 # List of directories where shells located
1482 # path = ('/bin', '/usr/bin', '/usr/local/bin')
1483 path = ($shpath)
1484
1485 # common shell list, first element has higher priority
1486 # shellpref = ('bash', 'tcsh', 'ksh', 'csh', 'sh')
1487 shellpref = ($shpref)
1488
1489 # defaultshell if not empty ("bash")
1490 defaultshell = "$defaultshell"
1491
1492 # defaultgroup ('USER' for same as username or any other valid group)
1493 defaultgroup = $defaultgroup
1494
1495 # defaultclass if not empty
1496 defaultclass = "$defaultclass"
1497
1498 # new users get this uid (1000)
1499 uid_start = "$uid_start"
1500
1501 $do_not_delete
1502 ## your own variables, see /etc/adduser.message
1503 $user_var
1504
1505 ## end
1506 EOF
1507     close C;
1508 }
1509
1510 ################
1511 # main
1512 #
1513 $test = 0;            # test mode, only for development
1514 $check_only = 0;
1515
1516 &check_root;        # you must be root to run this script!
1517 &variables;          # initialize variables
1518 &config_read(@ARGV);    # read variables form config-file
1519 &parse_arguments(@ARGV);    # parse arguments
1520
1521 if (!$check_only) {
1522     &copyright; &hints;
1523 }
1524
1525 # check
1526 $changes = 0;
1527 &passwd_check;                  # check for valid passwdb
1528 &shells_read;                   # read /etc/shells
1529 &passwd_read;                   # read /etc/master.passwd
1530 &group_read;                    # read /etc/group
1531 &group_check;                   # check for incon*
1532 exit 0 if $check_only;          # only check consistence and exit
1533
1534
1535 # interactive
1536 # some questions
1537 $usernameregexp = &usernameregexp_default; # regexp to check usernames against
1538 &shells_add;                    # maybe add some new shells
1539 $defaultshell = &shell_default; # enter default shell
1540 $home = &home_partition($home); # find HOME partition
1541 $dotdir = &dotdir_default;      # check $dotdir
1542 $send_message = &message_default;   # send message to new user
1543 $defaultusepassword = &password_default; # maybe use password
1544 if ($defaultusepassword eq "no") {
1545     if ($verbose) {
1546         print "Creating accounts with a locked password.\n";
1547     }
1548     $defaultenableaccount = "no";
1549     $defaultemptypassword = "yes";
1550 } else {
1551     $defaultenableaccount = &enable_account_default; # enable or disable account
1552     $defaultemptypassword = &enable_empty_password; # use empty password or not
1553 }
1554 &config_write(!$verbose);       # write variables in file
1555
1556 # main loop for creating new users
1557 &new_users;          # add new users
1558
1559 #end