summaryrefslogtreecommitdiffstats
path: root/usr.sbin/adduser/adduser.perl
blob: 3ce7b2aa03fd3c2dbbd6a22ca7434656cb953935 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
#!/usr/bin/perl
#
# Copyright (c) 1995-1996 Wolfram Schneider <wosch@FreeBSD.org>. Berlin.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$


# read variables
sub variables {
    $verbose = 1;		# verbose = [0-2]
    $defaultpasswd = "yes";	# use password for new users
    $dotdir = "/usr/share/skel"; # copy dotfiles from this dir
    $dotdir_bak = $dotdir;
    $send_message = "/etc/adduser.message"; # send message to new user
    $send_message_bak = '/etc/adduser.message';
    $config = "/etc/adduser.conf"; # config file for adduser
    $config_read = 1;		# read config file
    $logfile = "/var/log/adduser"; # logfile
    $home = "/home";		# default HOME
    $etc_shells = "/etc/shells";
    $etc_passwd = "/etc/master.passwd";
    $group = "/etc/group";
    $pwd_mkdb = "pwd_mkdb -p";	# program for building passwd database


    # List of directories where shells located
    @path = ('/bin', '/usr/bin', '/usr/local/bin');
    # common shells, first element has higher priority
    @shellpref = ('csh', 'sh', 'bash', 'tcsh', 'ksh');

    $defaultshell = 'sh';	# defaultshell if not empty
    $group_uniq = 'USER';
    $defaultgroup = $group_uniq;# login groupname, $group_uniq means username
    $defaultclass = '';

    $uid_start = 1000;		# new users get this uid
    $uid_end   = 32000;		# max. uid

    # global variables
    # passwd
    $username = '';		# $username{username} = uid
    $uid = '';			# $uid{uid} = username
    $pwgid = '';		# $pwgid{pwgid} = username; gid from passwd db

    $password = '';		# password for new users

    # group
    $groupname ='';		# $groupname{groupname} = gid
    $groupmembers = '';		# $groupmembers{gid} = members of group/kommalist
    $gid = '';			# $gid{gid} = groupname;    gid form group db

    # shell
    $shell = '';		# $shell{`basename sh`} = sh

    umask 022;			# don't give login group write access

    $ENV{'PATH'} = "/sbin:/bin:/usr/sbin:/usr/bin";
    @passwd_backup = '';
    @group_backup = '';
    @message_buffer = '';
    @user_variable_list = '';	# user variables in /etc/adduser.conf
    $do_not_delete = '## DO NOT DELETE THIS LINE!';
}

# read shell database, see also: shells(5)
sub shells_read {
    local($sh);
    local($err) = 0;

    print "Check $etc_shells\n" if $verbose;
    open(S, $etc_shells) || die "$etc_shells:$!\n";

    while(<S>) {
	if (/^\s*\//) {
	    s/^\s*//; s/\s+.*//; # chop
	    $sh = $_;
	    if (-x  $sh) {
		$shell{&basename($sh)} = $sh;
	    } else {
		warn "Shell: $sh not executable!\n";
		$err++;
	    }
	}
    }

    # Allow /nonexistent and /bin/date as a valid shell for system utils
    push(@list, "/nonexistent");
    push(@shellpref, "no") if !grep(/^no$/, @shellpref);
    $shell{"no"} = "/nonexistent";

    push(@list, "/bin/date");
    push(@shellpref, "date") if !grep(/^date$/, @shellpref);
    $shell{"date"} = "/bin/date";

    return $err;
}

# add new shells if possible
sub shells_add {
    local($sh,$dir,@list);

    return 1 unless $verbose;

    foreach $sh (@shellpref) {
	# all known shells
	if (!$shell{$sh}) {
	    # shell $sh is not defined as login shell
	    foreach $dir (@path) {
		if (-x "$dir/$sh") {
		    # found shell
		    if (&confirm_yn("Found shell: $dir/$sh. Add to $etc_shells?", "yes")) {
			push(@list, "$dir/$sh");
			push(@shellpref, "$sh");
			$shell{&basename("$dir/$sh")} = "$dir/$sh";
			$changes++;
		    }
		}
	    }
	}
    }
    &append_file($etc_shells, @list) if $#list >= 0;
}

# choose your favourite shell and return the shell
sub shell_default {
    local($e,$i,$new_shell);
    local($sh);

    $sh = &shell_default_valid($defaultshell);
    return $sh unless $verbose;

    $new_shell = &confirm_list("Enter your default shell:", 0,
		       $sh, sort(keys %shell));
    print "Your default shell is: $new_shell -> $shell{$new_shell}\n";
    $changes++ if $new_shell ne $sh;
    return $new_shell;
}

sub shell_default_valid {
    local($sh) = @_;
    local($s,$e);

    return $sh if $shell{$sh};

    foreach $e (@shellpref) {
	$s = $e;
	last if defined($shell{$s});
    }
    $s = "sh" unless $s;
    warn "Shell ``$sh'' is undefined, use ``$s''\n";
    return $s;
}

# return default home partition (e.g. "/home")
# create base directory if nesseccary
sub home_partition {
    local($home) = @_;
    $home = &stripdir($home);
    local($h) = $home;

    return $h if !$verbose && $h eq &home_partition_valid($h);

    while(1) {
	$h = &confirm_list("Enter your default HOME partition:", 1, $home, "");
	$h = &stripdir($h);
	last if $h eq &home_partition_valid($h);
    }

    $changes++ if $h ne $home;
    return $h;
}

sub home_partition_valid {
    local($h) = @_;

    $h = &stripdir($h);
    # all right (I hope)
    return $h if $h =~ "^/" && -e $h && -w $h && (-d $h || -l $h);

    # Errors or todo
    if ($h !~ "^/") {
	warn "Please use absolute path for home: ``$h''.\a\n";
	return 0;
    }

    if (-e $h) {
	warn "$h exists, but is not a directory or symlink!\n"
	    unless -d $h || -l $h;
	warn "$h is not writable!\n"
	    unless -w $h;
	return 0;
    } else {
	# create home partition
	return $h if &mkdir_home($h);
    }
    return 0;
}

# check for valid passwddb
sub passwd_check {
    system("$pwd_mkdb -C $etc_passwd");
    die "\nInvalid $etc_passwd - cannot add any users!\n" if $?;
}

# read /etc/passwd
sub passwd_read {
    local($p_username, $pw, $p_uid, $p_gid, $sh, %shlist);

    print "Check $etc_passwd\n" if $verbose;
    open(P, "$etc_passwd") || die "$passwd: $!\n";

    while(<P>) {
	chop;
	push(@passwd_backup, $_);
	# ignore comments
	next if /^\s*$/;
	next if /^\s*#/;

	($p_username, $pw, $p_uid, $p_gid, $sh) = (split(/:/, $_))[0..3,9];

	print "$p_username already exists with uid: $username{$p_username}!\n"
	    if $username{$p_username} && $verbose;
	$username{$p_username} = $p_uid;
	print "User $p_username: uid $p_uid exists twice: $uid{$p_uid}\n"
	    if $uid{$p_uid} && $verbose && $p_uid;    # don't warn for uid 0
	print "User $p_username: illegal shell: ``$sh''\n"
	    if ($verbose && $sh &&
		!$shell{&basename($sh)} &&
		$p_username !~ /^(news|xten|bin|nobody|uucp)$/ &&
		$sh !~ /\/(pppd|sliplogin|nologin|nonexistent)$/);
	$uid{$p_uid} = $p_username;
	$pwgid{$p_gid} = $p_username;
    }
    close P;
}

# read /etc/group
sub group_read {
    local($g_groupname,$pw,$g_gid, $memb);

    print "Check $group\n" if $verbose;
    open(G, "$group") || die "$group: $!\n";
    while(<G>) {
	chop;
	push(@group_backup, $_);
	# ignore comments
	next if /^\s*$/;
	next if /^\s*#/;

	($g_groupname, $pw, $g_gid, $memb) = (split(/:/, $_))[0..3];

	$groupmembers{$g_gid} = $memb;
	warn "Groupname exists twice: $g_groupname:$g_gid ->  $g_groupname:$groupname{$g_groupname}\n"
	    if $groupname{$g_groupname} && $verbose;
	$groupname{$g_groupname} = $g_gid;
	warn "Groupid exists twice:   $g_groupname:$g_gid -> $gid{$g_gid}:$g_gid\n"
	    if $gid{$g_gid} && $verbose;
	$gid{$g_gid} = $g_groupname;
    }
    close G;
}

# check gids /etc/passwd <-> /etc/group
sub group_check {
    local($c_gid, $c_username, @list);

    foreach $c_gid (keys %pwgid) {
	if (!$gid{$c_gid}) {
	    $c_username = $pwgid{$c_gid};
	    warn "User ``$c_username'' has gid $c_gid but a group with this " .
		"gid does not exist.\n" if $verbose;
	}
    }
}

#
# main loop for creating new users
#

# return username
sub new_users_name {
    local($name);

    while(1) {
	$name = &confirm_list("Enter username", 1, "a-z0-9_-", "");
	if (length($name) > 16) {
	    warn "Username is longer than 16 chars\a\n";
	    next;
	}
	last if (&new_users_name_valid($name) eq $name);
    }
    return $name;
}

sub new_users_name_valid {
    local($name) = @_;

    if ($name !~ /^[a-z0-9_][a-z0-9_\-]*$/ || $name eq "a-z0-9_-") {
	warn "Wrong username. " .
	    "Please use only lowercase characters or digits\a\n";
	return 0;
    } elsif ($username{$name}) {
	warn "Username ``$name'' already exists!\a\n"; return 0;
    }
    return $name;
}

# return full name
sub new_users_fullname {
    local($name) = @_;
    local($fullname);

    while(1) {
	$fullname = &confirm_list("Enter full name", 1, "", "");
	last if $fullname eq &new_users_fullname_valid($fullname);
    }
    $fullname = $name unless $fullname;
    return $fullname;
}

sub new_users_fullname_valid {
    local($fullname) = @_;

    return $fullname if $fullname !~ /:/;

    warn "``:'' is not allowed!\a\n";
    return 0;
}

# return shell (full path) for user
sub new_users_shell {
    local($sh);

    $sh = &confirm_list("Enter shell", 0, $defaultshell, keys %shell);
    return $shell{$sh};
}

# return home (full path) for user
# Note that the home path defaults to $home/$name for batch
sub new_users_home {
    local($name) = @_;
    local($userhome);

    while(1) {
        $userhome = &confirm_list("Enter home directory (full path)", 1, "$home/$name", "");
	last if $userhome =~ /^\//;
	warn qq{Home directory "$userhome" is not a full path\a\n};
    }
    return $userhome;
}

# return free uid and gid
sub new_users_id {
    local($name) = @_;
    local($u_id, $g_id) = &next_id($name);
    local($u_id_tmp, $e);

    while(1) {
	$u_id_tmp = &confirm_list("Uid", 1, $u_id, "");
	last if $u_id_tmp =~ /^[0-9]+$/ && $u_id_tmp <= $uid_end &&
		! $uid{$u_id_tmp};
	if ($uid{$u_id_tmp}) {
	    warn "Uid ``$u_id_tmp'' in use!\a\n";
	    $uid_start = $u_id_tmp;
	    ($u_id, $g_id) = &next_id($name);
	    next;
	} else {
	    warn "Wrong uid.\a\n";
	}
    }
    # use calculated uid
    # return ($u_id_tmp, $g_id) if $u_id_tmp eq $u_id;
    # recalculate gid
    $uid_start = $u_id_tmp;
    return &next_id($name);
}

# return login class for user
sub new_users_class {
    local($def) = @_;
    local($class);

    $class = &confirm_list("Enter login class:", 1, $def, ($def, "default"));
    $class = "" if $class eq "default";
    return $class;
}

# add user to group
sub add_group {
    local($gid, $name) = @_;

    return 0 if
	$groupmembers{$gid} =~ /^(.+,)?$name(,.+)?$/;

    $groupmembers_bak{$gid} = $groupmembers{$gid};
    $groupmembers{$gid} .= "," if $groupmembers{$gid};
    $groupmembers{$gid} .= "$name";

    return $name;
}


# return login group
sub new_users_grplogin {
    local($name, $defaultgroup, $new_users_ok) = @_;
    local($group_login, $group);

    $group = $name;
    $group = $defaultgroup if $defaultgroup ne $group_uniq;

    if ($new_users_ok) {
	# clean up backup
	foreach $e (keys %groupmembers_bak) { delete $groupmembers_bak{$e}; }
    } else {
	# restore old groupmembers, user was not accept
	foreach $e (keys %groupmembers_bak) {
	    $groupmembers{$e} = $groupmembers_bak{$e};
	}
    }

    while(1) {
	$group_login = &confirm_list("Login group", 1, $group,
				     ($name, $group));
	last if $group_login eq $group;
	last if $group_login eq $name;
	last if defined $groupname{$group_login};
	if ($group_login eq $group_uniq) {
	    $group_login = $name; last;
	}

	if (defined $gid{$group_login}) {
	    # convert numeric groupname (gid) to groupname
	    $group_login = $gid{$group_login};
	    last;
	}
	warn "Group does not exist!\a\n";
    }

    #if (defined($groupname{$group_login})) {
    #	&add_group($groupname{$group_login}, $name);
    #}

    return ($group_login, $group_uniq) if $group_login eq $name;
    return ($group_login, $group_login);
}

# return other groups (string)
sub new_users_groups {
    local($name, $other_groups) = @_;
    local($string) =
	"Login group is ``$group_login''. Invite $name into other groups:";
    local($e, $flag);
    local($new_groups,$groups);

    $other_groups = "no" unless $other_groups;

    while(1) {
	$groups = &confirm_list($string, 1, $other_groups,
				("no", $other_groups, "guest"));
	# no other groups
	return "" if $groups eq "no";

	($flag, $new_groups) = &new_users_groups_valid($groups);
	last unless $flag;
    }
    $new_groups =~ s/\s*$//;
    return $new_groups;
}

sub new_users_groups_valid {
    local($groups) = @_;
    local($e, $new_groups);
    local($flag) = 0;

    foreach $e (split(/[,\s]+/, $groups)) {
	# convert numbers to groupname
	if ($e =~ /^[0-9]+$/ && $gid{$e}) {
	    $e = $gid{$e};
	}
	if (defined($groupname{$e})) {
	    if ($e eq $group_login) {
		# do not add user to a group if this group
		# is also the login group.
	    } elsif (&add_group($groupname{$e}, $name)) {
		$new_groups .= "$e ";
	    } else {
		warn "$name is already member of group ``$e''\n";
	    }
	} else {
	    warn "Group ``$e'' does not exist\a\n"; $flag++;
	}
    }
    return ($flag, $new_groups);
}

# your last change
sub new_users_ok {

    print <<EOF;

Name:	  $name
Password: ****
Fullname: $fullname
Uid:	  $u_id
Gid:	  $g_id ($group_login)
Class:	  $class
Groups:	  $group_login $new_groups
HOME:     $userhome
Shell:	  $sh
EOF

    return &confirm_yn("OK?", "yes");
}

# make password database
sub new_users_pwdmkdb {
    local($last) = @_;

    system("$pwd_mkdb $etc_passwd");
    if ($?) {
	warn "$last\n";
	warn "``$pwd_mkdb'' failed\n";
	exit($? >> 8);
    }
}

# update group database
sub new_users_group_update {
    local($e, @a);

    # Add *new* group
    if (!defined($groupname{$group_login}) &&
	!defined($gid{$groupname{$group_login}})) {
	push(@group_backup, "$group_login:*:$g_id:");
	$groupname{$group_login} = $g_id;
	$gid{$g_id} = $group_login;
	# $groupmembers{$g_id} = $group_login;
    }

    if ($new_groups || defined($groupname{$group_login}) ||
	defined($gid{$groupname{$group_login}}) &&
		$gid{$groupname{$group_login}} ne "+") {
	# new user is member of some groups
	# new login group is already in name space
	rename($group, "$group.bak");
	#warn "$group_login $groupname{$group_login} $groupmembers{$groupname{$group_login}}\n";
	foreach $e (sort {$a <=> $b} (keys %gid)) {
	    push(@a, "$gid{$e}:*:$e:$groupmembers{$e}");
	}
	&append_file($group, @a);
    } else {
	&append_file($group, "$group_login:*:$g_id:");
    }

}

sub new_users_passwd_update {
    # update passwd/group variables
    push(@passwd_backup, $new_entry);
    $username{$name} = $u_id;
    $uid{$u_id} = $name;
    $pwgid{$g_id} = $name;
}

# send message to new user
sub new_users_sendmessage {
    return 1 if $send_message eq "no";

    local($cc) =
	&confirm_list("Send message to ``$name'' and:",
		      1, "no", ("root", "second_mail_address", "no"));
    local($e);
    $cc = "" if $cc eq "no";

    foreach $e (@message_buffer) {
	print eval "\"$e\"";
    }
    print "\n";

    local(@message_buffer_append) = ();
    if (!&confirm_yn("Add anything to default message", "no")) {
	print "Use ``.'' or ^D alone on a line to finish your message.\n";
	push(@message_buffer_append, "\n");
	while($read = <STDIN>) {
	    last if $read eq "\.\n";
	    push(@message_buffer_append, $read);
	}
    }

    &sendmessage("$name $cc", (@message_buffer, @message_buffer_append))
	if (&confirm_yn("Send message", "yes"));
}

sub sendmessage {
    local($to, @message) = @_;
    local($e);

    if (!open(M, "| mail -s Welcome $to")) {
	warn "Cannot send mail to: $to!\n";
	return 0;
    } else {
	foreach $e (@message) {
	    print M eval "\"$e\"";
	}
	close M;
    }
}


sub new_users_password {

    # empty password
    return "" if $defaultpasswd ne "yes";

    local($password);

    while(1) {
	system("stty -echo");
	$password = &confirm_list("Enter password", 1, "", "");
	system("stty echo");
	print "\n";
	if ($password ne "") {
	    system("stty -echo");
	    $newpass = &confirm_list("Enter password again", 1, "", "");
	    system("stty echo");
	    print "\n";
	    last if $password eq $newpass;
	    print "They didn't match, please try again\n";
	}
	elsif (&confirm_yn("Use an empty password?", "yes")) {
	    last;
	}
    }

    return $password;
}


sub new_users {

    print "\n" if $verbose;
    print "Ok, let's go.\n" .
	  "Don't worry about mistakes. I will give you the chance later to " .
	  "correct any input.\n" if $verbose;

    # name: Username
    # fullname: Full name
    # sh: shell
    # userhome: home path for user
    # u_id: user id
    # g_id: group id
    # class: login class
    # group_login: groupname of g_id
    # new_groups: some other groups
    local($name, $group_login, $fullname, $sh, $u_id, $g_id, $class, $new_groups);
    local($userhome);
    local($groupmembers_bak, $cryptpwd);
    local($new_users_ok) = 1;


    $new_groups = "no";
    $new_groups = "no" unless $groupname{$new_groups};

    while(1) {
	$name = &new_users_name;
	$fullname = &new_users_fullname($name);
	$sh = &new_users_shell;
        $userhome = &new_users_home($name);
	($u_id, $g_id) = &new_users_id($name);
	$class = &new_users_class($defaultclass);
	($group_login, $defaultgroup) =
	    &new_users_grplogin($name, $defaultgroup, $new_users_ok);
	# do not use uniq username and login group
	$g_id = $groupname{$group_login} if (defined($groupname{$group_login}));

	$new_groups = &new_users_groups($name, $new_groups);
	$password = &new_users_password;


	if (&new_users_ok) {
	    $new_users_ok = 1;

	    $cryptpwd = "";
	    $cryptpwd = crypt($password, &salt) if $password ne "";
	    # obscure perl bug
	    $new_entry = "$name\:" . "$cryptpwd" .
		"\:$u_id\:$g_id\:$class\:0:0:$fullname:$userhome:$sh";
	    &append_file($etc_passwd, "$new_entry");
	    &new_users_pwdmkdb("$new_entry");
	    &new_users_group_update;
	    &new_users_passwd_update;  print "Added user ``$name''\n";
	    &new_users_sendmessage;
	    &adduser_log("$name:*:$u_id:$g_id($group_login):$fullname");
	    &home_create($userhome, $name, $group_login);
	} else {
	    $new_users_ok = 0;
	}
	if (!&confirm_yn("Add another user?", "yes")) {
	    print "Goodbye!\n" if $verbose;
	    last;
	}
	print "\n" if !$verbose;
    }
}

# ask for password usage
sub password_default {
    local($p) = $defaultpasswd;
    if ($verbose) {
	$p = &confirm_yn("Use passwords", $defaultpasswd);
	$changes++ unless $p;
    }
    return "yes" if (($defaultpasswd eq "yes" && $p) ||
		     ($defaultpasswd eq "no" && !$p));
    return "no";    # otherwise
}

# misc
sub check_root {
    die "You are not root!\n" if $< && !$test;
}

sub usage {
    warn <<USAGE;
usage: adduser
    [-check_only]
    [-class login_class]
    [-config_create]
    [-dotdir dotdir]
    [-group login_group]
    [-h|-help]
    [-home home]
    [-message message_file]
    [-noconfig]
    [-shell shell]
    [-s|-silent|-q|-quiet]
    [-uid uid_start]
    [-v|-verbose]

home=$home shell=$defaultshell dotdir=$dotdir login_group=$defaultgroup
login_class=$defaultclass message_file=$send_message uid_start=$uid_start
USAGE
    exit 1;
}

# uniq(1)
sub uniq {
    local(@list) = @_;
    local($e, $last, @array);

    foreach $e (sort @list) {
	push(@array, $e) unless $e eq $last;
	$last = $e;
    }
    return @array;
}

# see /usr/src/usr.bin/passwd/local_passwd.c or librcypt, crypt(3)
sub salt {
    local($salt);		# initialization
    local($i, $rand);
    local(@itoa64) = ( '0' .. '9', 'a' .. 'z', 'A' .. 'Z' ); # 0 .. 63

    warn "calculate salt\n" if $verbose > 1;
    # to64
    for ($i = 0; $i < 8; $i++) {
	srand(time + $rand + $$); 
	$rand = rand(25*29*17 + $rand);
	$salt .=  $itoa64[$rand & $#itoa64];
    }
    warn "Salt is: $salt\n" if $verbose > 1;

    return $salt;
}


# print banner
sub copyright {
    return;
}

# hints
sub hints {
    if ($verbose) {
	print "Use option ``-silent'' if you don't want to see " .
	      "all warnings and questions.\n\n";
    } else {
	print "Use option ``-verbose'' if you want to see more warnings and " .
	      "questions \nor try to repair bugs.\n\n";
    }
}

#
sub parse_arguments {
    local(@argv) = @_;

    while ($_ = $argv[0], /^-/) {
	shift @argv;
	last if /^--$/;
	if    (/^--?(v|verbose)$/)	{ $verbose = 1 }
	elsif (/^--?(s|silent|q|quiet)$/)  { $verbose = 0 }
	elsif (/^--?(debug)$/)	    { $verbose = 2 }
	elsif (/^--?(h|help|\?)$/)	{ &usage }
	elsif (/^--?(home)$/)	 { $home = $argv[0]; shift @argv }
	elsif (/^--?(shell)$/)	 { $defaultshell = $argv[0]; shift @argv }
	elsif (/^--?(dotdir)$/)	 { $dotdir = $argv[0]; shift @argv }
	elsif (/^--?(uid)$/)	 { $uid_start = $argv[0]; shift @argv }
	elsif (/^--?(class)$/)   { $defaultclass = $argv[0]; shift @argv }
	elsif (/^--?(group)$/)	 { $defaultgroup = $argv[0]; shift @argv }
	elsif (/^--?(check_only)$/) { $check_only = 1 }
	elsif (/^--?(message)$/) { $send_message = $argv[0]; shift @argv;
				   $sendmessage = 1; }
	elsif (/^--?(batch)$/)	 {
	    warn "The -batch option is not supported anymore.\n",
	    "Please use the pw(8) command line tool!\n";
	    exit(0);
	}
	# see &config_read
	elsif (/^--?(config_create)$/)	{ &create_conf; }
	elsif (/^--?(noconfig)$/)	{ $config_read = 0; }
	else			    { &usage }
    }
    #&usage if $#argv < 0;
}

sub basename {
    local($name) = @_;
    $name =~ s|/+$||;
    $name =~ s|.*/+||;
    return $name;
}

sub dirname {
    local($name) = @_;
    $name = &stripdir($name);
    $name =~ s|/+[^/]+$||;
    $name = "/" unless $name;	# dirname of / is /
    return $name;
}

# return 1 if $file is a readable file or link
sub filetest {
    local($file, $verb) = @_;

    if (-e $file) {
	if (-f $file || -l $file) {
	    return 1 if -r _;
	    warn "$file unreadable\n" if $verbose;
	} else {
	    warn "$file is not a plain file or link\n" if $verbose;
	}
    }
    return 0;
}

# create configuration files and exit
sub create_conf {
    $create_conf = 1;
    if ($send_message ne 'no') {
	&message_create($send_message);
    } else {
	&message_create($send_message_bak);
    }
    &config_write(1);
    exit(0);
}

# log for new user in /var/log/adduser
sub adduser_log {
    local($string) = @_;
    local($e);

    return 1 if $logfile eq "no";

    local($sec, $min, $hour, $mday, $mon, $year) = localtime;
    $year += 1900;
    $mon++;

    foreach $e ('sec', 'min', 'hour', 'mday', 'mon', 'year') {
	# '7' -> '07'
	eval "\$$e = 0 . \$$e" if (eval "\$$e" < 10);
    }

    &append_file($logfile, "$year/$mon/$mday $hour:$min:$sec $string");
}

# create HOME directory, copy dotfiles from $dotdir to $HOME
sub home_create {
    local($homedir, $name, $group) = @_;
    local($rootdir);

    if (-e "$homedir") {
	warn "HOME Directory ``$homedir'' already exist\a\n";
	return 0;
    }

    # if the home directory prefix doesn't exist, create it
    # First, split the directory into a list; then remove the user's dir
    @dir = split('/', $homedir); pop(@dir);
    # Put back together & strip to get directory prefix
    $rootdir = &stripdir(join('/', @dir));

    if (!&mkdirhier("$rootdir")) {
	    # warn already displayed
	    return 0;
    }

    if ($dotdir eq 'no') {
	if (!mkdir("$homedir", 0755)) {
	    warn "$dir: $!\n"; return 0;
	}
	system 'chown', "$name:$group", $homedir;
	return !$?;
    }

    # copy files from  $dotdir to $homedir
    # rename 'dot.foo' files to '.foo'
    print "Copy files from $dotdir to $homedir\n" if $verbose;
    system("cp -R $dotdir $homedir");
    system("chmod -R u+wrX,go-w $homedir");
    system("chown -R $name:$group $homedir");

    # security
    opendir(D, $homedir);
    foreach $file (readdir(D)) {
	if ($file =~ /^dot\./ && -f "$homedir/$file") {
	    $file =~ s/^dot\././;
	    rename("$homedir/dot$file", "$homedir/$file");
	}
	chmod(0600, "$homedir/$file")
	    if ($file =~ /^\.(rhosts|Xauthority|kermrc|netrc)$/);
	chmod(0700, "$homedir/$file")
	    if ($file =~ /^(Mail|prv|\.(iscreen|term))$/);
    }
    closedir D;
    return 1;
}

# makes a directory hierarchy
sub mkdir_home {
    local($dir) = @_;
    $dir = &stripdir($dir);
    local($user_partition) = "/usr";
    local($dirname) = &dirname($dir);

    -e $dirname || &mkdirhier($dirname);

    if (((stat($dirname))[0]) == ((stat("/"))[0])){
	# home partition is on root partition
	# create home partition on $user_partition and make
	# a symlink from $dir to $user_partition/`basename $dir`
	# For instance: /home -> /usr/home

	local($basename) = &basename($dir);
	local($d) = "$user_partition/$basename";


	if (-d $d) {
	    warn "Oops, $d already exist\n" if $verbose;
	} else {
	    print "Create $d\n" if $verbose;
	    if (!mkdir("$d", 0755)) {
		warn "$d: $!\a\n"; return 0;
	    }
	}

	unlink($dir);		# symlink to nonexist file
	print "Create symlink: $dir -> $d\n" if $verbose;
	if (!symlink("$d", $dir)) {
	    warn "Symlink $d: $!\a\n"; return 0;
	}
    } else {
	print "Create $dir\n" if $verbose;
	if (!mkdir("$dir", 0755)) {
	    warn "Directory ``$dir'': $!\a\n"; return 0;
	}
    }
    return 1;
}

sub mkdirhier {
    local($dir) = @_;
    local($d,$p);

    $dir = &stripdir($dir);

    foreach $d (split('/', $dir)) {
	$dir = "$p/$d";
	$dir =~ s|^//|/|;
	if (! -e "$dir") {
	    print "Create $dir\n" if $verbose;
	    if (!mkdir("$dir", 0755)) {
		warn "$dir: $!\n"; return 0;
	    }
	}
	$p .= "/$d";
    }
    return 1;
}

# stript unused '/'
# F.i.: //usr///home// -> /usr/home
sub stripdir {
    local($dir) = @_;

    $dir =~ s|/+|/|g;		# delete double '/'
    $dir =~ s|/$||;		# delete '/' at end
    return $dir if $dir ne "";
    return '/';
}

# Read one of the elements from @list. $confirm is default.
# If !$allow accept only elements from @list.
sub confirm_list {
    local($message, $allow, $confirm, @list) = @_;
    local($read, $c, $print);

    $print = "$message" if $message;
    $print .= " " unless $message =~ /\n$/ || $#list == 0;

    $print .= join($", &uniq(@list)); #"
    $print .= " " unless $message =~ /\n$/ && $#list == 0;
    print "$print";
    print "\n" if (length($print) + length($confirm)) > 60;
    print "[$confirm]: ";

    chop($read = <STDIN>);
    $read =~ s/^\s*//;
    $read =~ s/\s*$//;
    return $confirm if $read eq "";
    return "$read" if $allow;

    foreach $c (@list) {
	return $read if $c eq $read;
    }
    warn "$read: is not allowed!\a\n";
    return &confirm_list($message, $allow, $confirm, @list);
}

# YES or NO question
# return 1 if &confirm("message", "yes") and answer is yes
#	or if &confirm("message", "no") an answer is no
# otherwise 0
sub confirm_yn {
    local($message, $confirm) = @_;
    local($yes) = '^(yes|YES|y|Y)$';
    local($no) = '^(no|NO|n|N)$';
    local($read, $c);

    if ($confirm && ($confirm =~ "$yes" || $confirm == 1)) {
	$confirm = "y";
    } else {
	$confirm = "n";
    }
    print "$message (y/n) [$confirm]: ";
    chop($read = <STDIN>);
    $read =~ s/^\s*//;
    $read =~ s/\s*$//;
    return 1 unless $read;

    if (($confirm eq "y" && $read =~ "$yes") ||
	($confirm eq "n" && $read =~ "$no")) {
	return 1;
    }

    if ($read !~ "$yes" && $read !~ "$no") {
	warn "Wrong value. Enter again!\a\n";
	return &confirm_yn($message, $confirm);
    }
    return 0;
}

# test if $dotdir exist
# return "no" if $dotdir not exist or dotfiles should not copied
sub dotdir_default {
    local($dir) = $dotdir;

    return &dotdir_default_valid($dir) unless $verbose;
    while($verbose) {
	$dir = &confirm_list("Copy dotfiles from:", 1,
	    $dir, ("no", $dotdir_bak, $dir));
	last if $dir eq &dotdir_default_valid($dir);
    }
    warn "Do not copy dotfiles.\n" if $verbose && $dir eq "no";

    $changes++ if $dir ne $dotdir;
    return $dir;
}

sub dotdir_default_valid {
    local($dir) = @_;

    return $dir if (-e $dir && -r _ && (-d _ || -l $dir) && $dir =~ "^/");
    return $dir if $dir eq "no";
    warn "Dotdir ``$dir'' is not a directory\a\n";
    return "no";
}

# ask for messages to new users
sub message_default {
    local($file) = $send_message;
    local(@d) = ($file, $send_message_bak, "no");

    while($verbose) {
	$file = &confirm_list("Send message from file:", 1, $file, @d);
	last if $file eq "no";
	last if &filetest($file, 1);

	# maybe create message file
	&message_create($file) if &confirm_yn("Create ``$file''?", "yes");
	last if &filetest($file, 0);
	last if !&confirm_yn("File ``$file'' does not exist, try again?",
			     "yes");
    }

    if ($file eq "no" || !&filetest($file, 0)) {
	warn "Do not send message\n" if $verbose;
	$file = "no";
    } else {
	&message_read($file);
    }

    $changes++ if $file ne $send_message && $verbose;
    return $file;
}

# create message file
sub message_create {
    local($file) = @_;

    rename($file, "$file.bak");
    if (!open(M, "> $file")) {
	warn "Messagefile ``$file'': $!\n"; return 0;
    }
    print M <<EOF;
#
# Message file for adduser(8)
#   comment: ``#''
#   default variables: \$name, \$fullname, \$password
#   other variables:  see /etc/adduser.conf after
#		     line  ``$do_not_delete''
#

\$fullname,

your account ``\$name'' was created.
Have fun!

See also chpass(1), finger(1), passwd(1)
EOF
    close M;
    return 1;
}

# read message file into buffer
sub message_read {
    local($file) = @_;
    @message_buffer = '';

    if (!open(R, "$file")) {
	warn "File ``$file'':$!\n"; return 0;
    }
    while(<R>) {
	push(@message_buffer, $_) unless /^\s*#/;
    }
    close R;
}

# write @list to $file with file-locking
sub append_file {
    local($file,@list) = @_;
    local($e);
    local($LOCK_EX) = 2;
    local($LOCK_NB) = 4;
    local($LOCK_UN) = 8;

    open(F, ">> $file") || die "$file: $!\n";
    print "Lock $file.\n" if $verbose > 1;
    while(!flock(F, $LOCK_EX | $LOCK_NB)) {
	warn "Cannot lock file: $file\a\n";
	die "Sorry, give up\n"
	    unless &confirm_yn("Try again?", "yes");
    }
    print F join("\n", @list) . "\n";
    close F;
    print "Unlock $file.\n" if $verbose > 1;
    flock(F, $LOCK_UN);
}

# return free uid+gid
# uid == gid if possible
sub next_id {
    local($group) = @_;

    $uid_start = 1000 if ($uid_start <= 0 || $uid_start >= $uid_end);
    # looking for next free uid
    while($uid{$uid_start}) {
	$uid_start++;
	$uid_start = 1000 if $uid_start >= $uid_end;
	print "$uid_start\n" if $verbose > 1;
    }

    local($gid_start) = $uid_start;
    # group for user (username==groupname) already exist
    if ($groupname{$group}) {
	$gid_start = $groupname{$group};
    }
    # gid is in use, looking for another gid.
    # Note: uid an gid are not equal
    elsif ($gid{$uid_start}) {
	while($gid{$gid_start} || $uid{$gid_start}) {
	    $gid_start--;
	    $gid_start = $uid_end if $gid_start < 100;
	}
    }
    return ($uid_start, $gid_start);
}

# read config file
sub config_read {
    local($opt) = @_;
    local($user_flag) = 0;

    # don't read config file
    return 1 if $opt =~ /-(noconfig|config_create)/ || !$config_read;

    if(!open(C, "$config")) {
	warn "$config: $!\n"; return 0;
    }

    while(<C>) {
	# user defined variables
	/^$do_not_delete/ && $user_flag++;
	# found @array or $variable
	if (s/^(\w+\s*=\s*\()/\@$1/ || s/^(\w+\s*=)/\$$1/) {
	    eval $_;
	    #warn "$_";
	}
	# lines with '^##' are not saved
	push(@user_variable_list, $_)
	    if $user_flag && !/^##/ && (s/^[\$\@]// || /^[#\s]/);
    }
    #warn "X @user_variable_list X\n";
    close C;
}


# write config file
sub config_write {
    local($silent) = @_;

    # nothing to do
    return 1 unless ($changes || ! -e $config || !$config_read || $silent);

    if (!$silent) {
	if (-e $config) {
	    return 1 if &confirm_yn("\nWrite your changes to $config?", "no");
	} else {
	    return 1 unless
		&confirm_yn("\nWrite your configuration to $config?", "yes");
	}
    }

    rename($config, "$config.bak");
    open(C, "> $config") || die "$config: $!\n";

    # prepare some variables
    $send_message = "no" unless $send_message;
    $defaultpasswd = "no" unless $defaultpasswd;
    local($shpref) = "'" . join("', '", @shellpref) . "'";
    local($shpath) = "'" . join("', '", @path) . "'";
    local($user_var) = join('', @user_variable_list);

    print C <<EOF;
#
# $config - automatic generated by adduser(8)
#
# Note: adduser read *and* write this file.
#	You may change values, but don't add new things before the
#	line ``$do_not_delete''
#

# verbose = [0-2]
verbose = $verbose

# use password for new users
# defaultpasswd =  yes | no
defaultpasswd = $defaultpasswd

# copy dotfiles from this dir ("/usr/share/skel" or "no")
dotdir = "$dotdir"

# send this file to new user ("/etc/adduser.message" or "no")
send_message = "$send_message"

# config file for adduser ("/etc/adduser.conf")
config = "$config"

# logfile ("/var/log/adduser" or "no")
logfile = "$logfile"

# default HOME directory ("/home")
home = "$home"

# List of directories where shells located
# path = ('/bin', '/usr/bin', '/usr/local/bin')
path = ($shpath)

# common shell list, first element has higher priority
# shellpref = ('bash', 'tcsh', 'ksh', 'csh', 'sh')
shellpref = ($shpref)

# defaultshell if not empty ("bash")
defaultshell = "$defaultshell"

# defaultgroup ('USER' for same as username or any other valid group)
defaultgroup = $defaultgroup

# defaultclass if not empty
defaultclass = "$defaultclass"

# new users get this uid (1000)
uid_start = "$uid_start"

$do_not_delete
## your own variables, see /etc/adduser.message
$user_var

## end
EOF
    close C;
}

################
# main
#
$test = 0;	      # test mode, only for development
$check_only = 0;

&check_root;	    # you must be root to run this script!
&variables;	     # initialize variables
&config_read(@ARGV);	# read variables form config-file
&parse_arguments(@ARGV);    # parse arguments

if (!$check_only) {
    &copyright; &hints;
}

# check
$changes = 0;
&passwd_check;			# check for valid passwdb
&shells_read;			# read /etc/shells
&passwd_read;			# read /etc/master.passwd
&group_read;			# read /etc/group
&group_check;			# check for incon*
exit 0 if $check_only;		# only check consistence and exit


# interactive
# some questions
&shells_add;			# maybe add some new shells
$defaultshell = &shell_default;	# enter default shell
$home = &home_partition($home);	# find HOME partition
$dotdir = &dotdir_default;	# check $dotdir
$send_message = &message_default;   # send message to new user
$defaultpasswd = &password_default; # maybe use password
&config_write(!$verbose);	# write variables in file

# main loop for creating new users
&new_users;	     # add new users

#end
OpenPOWER on IntegriCloud