summaryrefslogtreecommitdiffstats
path: root/usr.sbin/adduser/adduser.sh
blob: 735d178c1aefbd8ee78a895ccf369f3d5ec46fb0 (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
#!/bin/sh
#
# Copyright (c) 2002-2004 Michael Telahun Makonnen. 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 ``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 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.
#
#       Email: Mike Makonnen <mtm@FreeBSD.Org>
#
# $FreeBSD$
#

# err msg
#       Display $msg on stderr, unless we're being quiet.
# 
err() {
	if [ -z "$quietflag" ]; then
        	echo 1>&2 ${THISCMD}: ERROR: $*
	fi
}

# info msg
#       Display $msg on stdout, unless we're being quiet.
# 
info() {
	if [ -z "$quietflag" ]; then
        	echo ${THISCMD}: INFO: $*
	fi
}

# get_nextuid
#	Output the value of $_uid if it is available for use. If it
#	is not, output the value of the next higher uid that is available.
#	If a uid is not specified, output the first available uid, as indicated
#	by pw(8).
# 
get_nextuid () {
	_uid=$1
	_nextuid=

	if [ -z "$_uid" ]; then
		_nextuid="`${PWCMD} usernext | cut -f1 -d:`"
	else
		while : ; do
			${PWCMD} usershow $_uid > /dev/null 2>&1
			if [ ! "$?" -eq 0 ]; then
				_nextuid=$_uid
				break
			fi
			_uid=$(($_uid + 1))
		done
	fi
	echo $_nextuid
}

# show_usage
#	Display usage information for this utility.
#
show_usage() {
	echo "usage: ${THISCMD} [options]"
	echo "  options may include:"
	echo "  -C		save to the configuration file only"
	echo "  -D		do not attempt to create the home directory"
	echo "  -E		disable this account after creation"
	echo "  -G		additional groups to add accounts to"
	echo "  -L		login class of the user"
	echo "  -N		do not read configuration file"
	echo "  -S		a nonexistent shell is not an error"
	echo "  -d		home directory"
	echo "  -f		file from which input will be received"
	echo "  -g		default login group"
	echo "  -h		display this usage message"
	echo "  -k		path to skeleton home directory"
	echo "  -m		user welcome message file"
	echo "  -q		absolute minimal user feedback"
	echo "  -s		shell"
	echo "  -u		uid to start at"
	echo "  -w		password type: no, none, yes or random"
}

# valid_shells
#	Outputs a list of valid shells from /etc/shells. Only the
#	basename of the shell is output.
#
valid_shells() {
	_prefix=
	cat ${ETCSHELLS} |
	while read _path _junk ; do
		case $_path in
		\#*|'')
			;;
		*)
			echo -n "${_prefix}`basename $_path`"
			_prefix=' '
			;;
		esac
	done

	# /usr/sbin/nologin is a special case
	[ -x "${NOLOGIN_PATH}" ] && echo -n " ${NOLOGIN}"
}

# fullpath_from_shell shell
#	Given $shell, which is either the full path to a shell or
#	the basename component of a valid shell, get the
#	full path to the shell from the /etc/shells file.
#
fullpath_from_shell() {
	_shell=$1
	[ -z "$_shell" ] && return 1

	# /usr/sbin/nologin is a special case; it needs to be handled
	# before the cat | while loop, since a 'return' from within
	# a subshell will not terminate the function's execution, and
	# the path to the nologin shell might be printed out twice.
	#
	if [ "$_shell" = "${NOLOGIN}" -o \
	    "$_shell" = "${NOLOGIN_PATH}" ]; then
		echo ${NOLOGIN_PATH}
		return 0;
	fi

	cat ${ETCSHELLS} |
	while read _path _junk ; do
		case "$_path" in
		\#*|'')
			;;
		*)
			if [ "$_path" = "$_shell" -o \
			    "`basename $_path`" = "$_shell" ]; then
				echo $_path
				return 0
			fi
			;;
		esac
	done

	return 1
}

# shell_exists shell
#	If the given shell is listed in ${ETCSHELLS} or it is
#	the nologin shell this function will return 0.
#	Otherwise, it will return 1. If shell is valid but
#	the path is invalid or it is not executable it
#	will emit an informational message saying so.
#
shell_exists()
{
	_sh="$1"
	_shellchk="${GREPCMD} '^$_sh$' ${ETCSHELLS} > /dev/null 2>&1"

	if ! eval $_shellchk; then
		# The nologin shell is not listed in /etc/shells.
		if [ "$_sh" != "${NOLOGIN_PATH}" ]; then
			err "Invalid shell ($_sh) for user $username."
			return 1
		fi
	fi
	! [ -x "$_sh" ] &&
	    info "The shell ($_sh) does not exist or is not executable."

	return 0
}

# save_config
#	Save some variables to a configuration file.
#	Note: not all script variables are saved, only those that
#	      it makes sense to save.
#
save_config() {
	echo "# Configuration file for adduser(8)."     >  ${ADDUSERCONF}
	echo "# NOTE: only *some* variables are saved." >> ${ADDUSERCONF}
	echo "# Last Modified on `${DATECMD}`."		>> ${ADDUSERCONF}
	echo ''				>> ${ADDUSERCONF}
	echo "defaultLgroup=$ulogingroup" >> ${ADDUSERCONF}
	echo "defaultclass=$uclass"	>> ${ADDUSERCONF}
	echo "defaultgroups=$ugroups"	>> ${ADDUSERCONF}
	echo "passwdtype=$passwdtype" 	>> ${ADDUSERCONF}
	echo "homeprefix=$homeprefix" 	>> ${ADDUSERCONF}
	echo "defaultshell=$ushell"	>> ${ADDUSERCONF}
	echo "udotdir=$udotdir"		>> ${ADDUSERCONF}
	echo "msgfile=$msgfile"		>> ${ADDUSERCONF}
	echo "disableflag=$disableflag" >> ${ADDUSERCONF}
}

# add_user
#	Add a user to the user database. If the user chose to send a welcome
#	message or lock the account, do so.
#
add_user() {

	# Is this a configuration run? If so, don't modify user database.
	#
	if [ -n "$configflag" ]; then
		save_config
		return
	fi

	_uid=
	_name=
	_comment=
	_gecos=
	_home=
	_group=
	_grouplist=
	_shell=
	_class=
	_dotdir=
	_expire=
	_pwexpire=
	_passwd=
	_upasswd=
	_passwdmethod=

	_name="-n '$username'"
	[ -n "$uuid" ] && _uid='-u "$uuid"'
	[ -n "$ulogingroup" ] && _group='-g "$ulogingroup"'
	[ -n "$ugroups" ] && _grouplist='-G "$ugroups"'
	[ -n "$ushell" ] && _shell='-s "$ushell"'
	[ -n "$uclass" ] && _class='-L "$uclass"'
	[ -n "$ugecos" ] && _comment='-c "$ugecos"'
	[ -n "$udotdir" ] && _dotdir='-k "$udotdir"'
	[ -n "$uexpire" ] && _expire='-e "$uexpire"'
	[ -n "$upwexpire" ] && _pwexpire='-p "$upwexpire"'
	if [ -z "$Dflag" -a -n "$uhome" ]; then
		# The /nonexistent home directory is special. It
		# means the user has no home directory.
		if [ "$uhome" = "$NOHOME" ]; then
			_home='-d "$uhome"'
		else
			_home='-m -d "$uhome"'
		fi
	elif [ -n "$Dflag" -a -n "$uhome" ]; then
		_home='-d "$uhome"'
	fi
	case $passwdtype in
	no)
		_passwdmethod="-w no"
		_passwd="-h -"
		;;
	yes)
		# Note on processing the password: The outer double quotes
		# make literal everything except ` and \ and $.
		# The outer single quotes make literal ` and $.
		# We can ensure the \ isn't treated specially by specifying
		# the -r switch to the read command used to obtain the input.
		#
		_passwdmethod="-w yes"
		_passwd="-h 0"
		_upasswd='echo "$upass" |'
		;;
	none)
		_passwdmethod="-w none"
		;;
	random)
		_passwdmethod="-w random"
		;;
	esac

	_pwcmd="$_upasswd ${PWCMD} useradd $_uid $_name $_group $_grouplist $_comment"
	_pwcmd="$_pwcmd $_shell $_class $_home $_dotdir $_passwdmethod $_passwd"
	_pwcmd="$_pwcmd $_expire $_pwexpire"

	if ! _output=`eval $_pwcmd` ; then
		err "There was an error adding user ($username)."
		return 1
	else
		info "Successfully added ($username) to the user database."
		if [ "random" = "$passwdtype" ]; then
			randompass="$_output"
			info "Password for ($username) is: $randompass"
		fi
	fi

	if [ -n "$disableflag" ]; then
		if ${PWCMD} lock $username ; then
			info "Account ($username) is locked."
		else
			info "Account ($username) could NOT be locked."
		fi
	fi

	_line=
	_owner=
	_perms=
	if [ -n "$msgflag" ]; then
		[ -r "$msgfile" ] && {
			# We're evaluating the contents of an external file.
			# Let's not open ourselves up for attack. _perms will
			# be empty if it's writeable only by the owner. _owner
			# will *NOT* be empty if the file is owned by root.
			#
			_dir="`dirname $msgfile`"
			_file="`basename $msgfile`"
			_perms=`/usr/bin/find $_dir -name $_file -perm +07022 -prune`
			_owner=`/usr/bin/find $_dir -name $_file -user 0 -prune`
			if [ -z "$_owner" -o -n "$_perms" ]; then
				err "The message file ($msgfile) may be writeable only by root."
				return 1
			fi
			cat "$msgfile" |
			while read _line ; do
				eval echo "$_line"
			done | ${MAILCMD} -s"Welcome" ${username}
			info "Sent welcome message to ($username)."
		}
	fi
}

# get_user
#	Reads username of the account from standard input or from a global
#	variable containing an account line from a file. The username is
#	required. If this is an interactive session it will prompt in
#	a loop until a username is entered. If it is batch processing from
#	a file it will output an error message and return to the caller.
#
get_user() {
	_input=

	# No need to take down user names if this is a configuration saving run.
	[ -n "$configflag" ] && return

	while : ; do
		if [ -z "$fflag" ]; then
			echo -n "Username: "
			read _input
		else
			_input="`echo "$fileline" | cut -f1 -d:`"
		fi

		# There *must* be a username. If this is an interactive
		# session give the user an opportunity to retry.
		#
		if [ -z "$_input" ]; then
			err "You must enter a username!"
			[ -z "$fflag" ] && continue
		fi
		break
	done
	username="$_input"
}

# get_gecos
#	Reads extra information about the user. Can be used both in interactive
#	and batch (from file) mode.
#
get_gecos() {
	_input=

	# No need to take down additional user information for a configuration run.
	[ -n "$configflag" ] && return

	if [ -z "$fflag" ]; then
		echo -n "Full name: "
		read _input
	else
		_input="`echo "$fileline" | cut -f7 -d:`"
	fi
	ugecos="$_input"
}

# get_shell
#	Get the account's shell. Works in interactive and batch mode. It
#	accepts either the base name of the shell or the full path.
#	If an invalid shell is entered it will simply use the default shell.
#
get_shell() {
	_input=
	_fullpath=
	ushell="$defaultshell"

	# Make sure the current value of the shell is a valid one
	if [ -z "$Sflag" ]; then
		if ! shell_exists $ushell ; then
			info "Using default shell ${defaultshell}."
			ushell="$defaultshell"
		fi
	fi

	if [ -z "$fflag" ]; then
		echo -n "Shell ($shells) [`basename $ushell`]: "
		read _input
	else
		_input="`echo "$fileline" | cut -f9 -d:`"
	fi
	if [ -n "$_input" ]; then
		if [ -n "$Sflag" ]; then
			ushell="$_input"
		else
			_fullpath=`fullpath_from_shell $_input`
			if [ -n "$_fullpath" ]; then
				ushell="$_fullpath"
			else
				err "Invalid shell ($_input) for user $username."
				info "Using default shell ${defaultshell}."
				ushell="$defaultshell"
			fi
		fi
	fi
}

# get_homedir
#	Reads the account's home directory. Used both with interactive input
#	and batch input.
#
get_homedir() {
	_input=
	if [ -z "$fflag" ]; then
		echo -n "Home directory [${homeprefix}/${username}]: "
		read _input
	else
		_input="`echo "$fileline" | cut -f8 -d:`"
	fi

	if [ -n "$_input" ]; then
		uhome="$_input"
		# if this is a configuration run, then user input is the home
		# directory prefix. Otherwise it is understood to
		# be $prefix/$user
		#
		[ -z "$configflag" ] && homeprefix="`dirname $uhome`" || homeprefix="$uhome"
	else
		uhome="${homeprefix}/${username}"
	fi
}

# get_uid
#	Reads a numeric userid in an interactive or batch session. Automatically
#	allocates one if it is not specified.
#
get_uid() {
	if [ -z "$uuid" ]; then
		uuid=${uidstart}
	fi

	_input=
	_prompt=

	# No need to take down uids for a configuration saving run.
	[ -n "$configflag" ] && return

	if [ -n "$uuid" ]; then
		_prompt="Uid [$uuid]: "
	else
		_prompt="Uid (Leave empty for default): "
	fi
	if [ -z "$fflag" ]; then
		echo -n "$_prompt"
		read _input
	else
		_input="`echo "$fileline" | cut -f2 -d:`"
	fi

	[ -n "$_input" ] && uuid=$_input
	uuid=`get_nextuid $uuid`
	uidstart=$uuid
}

# get_class
#	Reads login class of account. Can be used in interactive or batch mode.
#
get_class() {
	uclass="$defaultclass"
	_input=
	_class=${uclass:-"default"}

	if [ -z "$fflag" ]; then
		echo -n "Login class [$_class]: "
		read _input
	else
		_input="`echo "$fileline" | cut -f4 -d:`"
	fi

	[ -n "$_input" ] && uclass="$_input"
}

# get_logingroup
#	Reads user's login group. Can be used in both interactive and batch
#	modes. The specified value can be a group name or its numeric id.
#	This routine leaves the field blank if nothing is provided and
#	a default login group has not been set. The pw(8) command
#	will then provide a login group with the same name as the username.
#
get_logingroup() {
	ulogingroup="$defaultLgroup"
	_input=

	if [ -z "$fflag" ]; then
		echo -n "Login group [${ulogingroup:-$username}]: "
		read _input
	else
		_input="`echo "$fileline" | cut -f3 -d:`"
	fi

	# Pw(8) will use the username as login group if it's left empty
	[ -n "$_input" ] && ulogingroup="$_input"
}

# get_groups
#	Read additional groups for the user. It can be used in both interactive
#	and batch modes.
#
get_groups() {
	ugroups="$defaultgroups"
	_input=
	_group=${ulogingroup:-"${username}"}

	if [ -z "$configflag" ]; then
		[ -z "$fflag" ] && echo -n "Login group is $_group. Invite $username"
		[ -z "$fflag" ] && echo -n " into other groups? [$ugroups]: "
	else
		[ -z "$fflag" ] && echo -n "Enter additional groups [$ugroups]: "
	fi
	read _input

	[ -n "$_input" ] && ugroups="$_input"
}

# get_expire_dates
#	Read expiry information for the account and also for the password. This
#	routine is used only from batch processing mode.
#
get_expire_dates() {
	upwexpire="`echo "$fileline" | cut -f5 -d:`"
	uexpire="`echo "$fileline" | cut -f6 -d:`"
}

# get_password
#	Read the password in batch processing mode. The password field matters
#	only when the password type is "yes" or "random". If the field is empty and the
#	password type is "yes", then it assumes the account has an empty passsword
#	and changes the password type accordingly. If the password type is "random"
#	and the password field is NOT empty, then it assumes the account will NOT
#	have a random password and set passwdtype to "yes."
#
get_password() {
	# We may temporarily change a password type. Make sure it's changed
	# back to whatever it was before we process the next account.
	#
	[ -n "$savedpwtype" ] && {
		passwdtype=$savedpwtype
		savedpwtype=
	}

	# There may be a ':' in the password
	upass=${fileline#*:*:*:*:*:*:*:*:*:}

	if [ -z "$upass" ]; then
		case $passwdtype in
		yes)
			# if it's empty, assume an empty password
			passwdtype=none
			savedpwtype=yes
			;;
		esac
	else
		case $passwdtype in
		random)
			passwdtype=yes
			savedpwtype=random
			;;
		esac
	fi
}

# input_from_file
#	Reads a line of account information from standard input and
#	adds it to the user database.
#
input_from_file() {
	_field=

	while read -r fileline ; do
		case "$fileline" in
		\#*|'')
			;;
		esac

		get_user || continue
		get_gecos
		get_uid
		get_logingroup
		get_class
		get_shell
		get_homedir
		get_password
		get_expire_dates

		add_user
	done
}

# input_interactive
#	Prompts for user information interactively, and commits to
#	the user database.
#
input_interactive() {

	_disable=
	_pass=
	_passconfirm=
	_random="no"
	_emptypass="no"
	_usepass="yes"
	_logingroup_ok="no"
	_groups_ok="no"
	case $passwdtype in
	none)
		_emptypass="yes"
		_usepass="yes"
		;;
	no)
		_usepass="no"
		;;
	random)
		_random="yes"
		;;
	esac

	get_user
	get_gecos
	get_uid

	# The case where group = user is handled elsewhere, so
	# validate any other groups the user is invited to.
	until [ "$_logingroup_ok" = yes ]; do
		get_logingroup
		_logingroup_ok=yes
		if [ -n "$ulogingroup" -a "$username" != "$ulogingroup" ]; then
			if ! ${PWCMD} show group $ulogingroup > /dev/null 2>&1; then
				echo "Group $ulogingroup does not exist!"
				_logingroup_ok=no
			fi
		fi
	done
	until [ "$_groups_ok" = yes ]; do
		get_groups
		_groups_ok=yes
		for i in $ugroups; do
			if [ "$username" != "$i" ]; then
				if ! ${PWCMD} show group $i > /dev/null 2>&1; then
					echo "Group $i does not exist!"
					_groups_ok=no
				fi
			fi
		done
	done

	get_class
	get_shell
	get_homedir

	while : ; do
		echo -n "Use password-based authentication? [$_usepass]: "
		read _input
		[ -z "$_input" ] && _input=$_usepass
		case $_input in
		[Nn][Oo]|[Nn])
			passwdtype="no"
			;;
		[Yy][Ee][Ss]|[Yy][Ee]|[Yy])
			while : ; do
				echo -n "Use an empty password? (yes/no) [$_emptypass]: "
				read _input
				[ -n "$_input" ] && _emptypass=$_input
				case $_emptypass in
				[Nn][Oo]|[Nn])
					echo -n "Use a random password? (yes/no) [$_random]: "
					read _input
					[ -n "$_input" ] && _random="$_input"
					case $_random in
					[Yy][Ee][Ss]|[Yy][Ee]|[Yy])
						passwdtype="random"
						break
						;;
					esac
					passwdtype="yes"
					[ -n "$configflag" ] && break
					trap 'stty echo; exit' 0 1 2 3 15
					stty -echo
					echo -n "Enter password: "
					read -r upass
					echo''
					echo -n "Enter password again: "
					read -r _passconfirm
					echo ''
					stty echo
					# if user entered a blank password
					# explicitly ask again.
					[ -z "$upass" -a -z "$_passconfirm" ] \
					    && continue
					;;
				[Yy][Ee][Ss]|[Yy][Ee]|[Yy])
					passwdtype="none"
					break;
					;;
				*)
					# invalid answer; repeat the loop
					continue
					;;
				esac
				if [ "$upass" != "$_passconfirm" ]; then
					echo "Passwords did not match!"
					continue
				fi
				break
			done
			;;
		*)
			# invalid answer; repeat loop
			continue
			;;
		esac
		break;
	done
	_disable=${disableflag:-"no"}
	while : ; do
		echo -n "Lock out the account after creation? [$_disable]: "
		read _input
		[ -z "$_input" ] && _input=$_disable
		case $_input in
		[Nn][Oo]|[Nn])
			disableflag=
			;;
		[Yy][Ee][Ss]|[Yy][Ee]|[Yy])
			disableflag=yes
			;;
		*)
			# invalid answer; repeat loop
			continue
			;;
		esac
		break
	done
	
	# Display the information we have so far and prompt to
	# commit it.
	#
	_disable=${disableflag:-"no"}
	[ -z "$configflag" ] && printf "%-10s : %s\n" Username $username
	case $passwdtype in
	yes)
		_pass='*****'
		;;
	no)
		_pass='<disabled>'
		;;
	none)
		_pass='<blank>'
		;;
	random)
		_pass='<random>'
		;;
	esac
	[ -z "$configflag" ] && printf "%-10s : %s\n" "Password" "$_pass"
	[ -n "$configflag" ] && printf "%-10s : %s\n" "Pass Type" "$passwdtype"
	[ -z "$configflag" ] && printf "%-10s : %s\n" "Full Name" "$ugecos"
	[ -z "$configflag" ] && printf "%-10s : %s\n" "Uid" "$uuid"
	printf "%-10s : %s\n" "Class" "$uclass"
	printf "%-10s : %s %s\n" "Groups" "${ulogingroup:-$username}" "$ugroups"
	printf "%-10s : %s\n" "Home" "$uhome"
	printf "%-10s : %s\n" "Shell" "$ushell"
	printf "%-10s : %s\n" "Locked" "$_disable"
	while : ; do
		echo -n "OK? (yes/no): "
		read _input
		case $_input in
		[Nn][Oo]|[Nn])
			return 1
			;;
		[Yy][Ee][Ss]|[Yy][Ee]|[Yy])
			add_user
			;;
		*)
			continue
			;;
		esac
		break
	done
	return 0
}

#### END SUBROUTINE DEFINITION ####

THISCMD=`/usr/bin/basename $0`
DEFAULTSHELL=/bin/sh
ADDUSERCONF="${ADDUSERCONF:-/etc/adduser.conf}"
PWCMD="${PWCMD:-/usr/sbin/pw}"
MAILCMD="${MAILCMD:-mail}"
ETCSHELLS="${ETCSHELLS:-/etc/shells}"
NOHOME="/nonexistent"
NOLOGIN="nologin"
NOLOGIN_PATH="/usr/sbin/nologin"
GREPCMD="/usr/bin/grep"
DATECMD="/bin/date"

# Set default values
#
username=
uuid=
uidstart=
ugecos=
ulogingroup=
uclass=
uhome=
upass=
ushell=
udotdir=/usr/share/skel
ugroups=
uexpire=
upwexpire=
shells="`valid_shells`"
passwdtype="yes"
msgfile=/etc/adduser.msg
msgflag=
quietflag=
configflag=
fflag=
infile=
disableflag=
Dflag=
Sflag=
readconfig="yes"
homeprefix="/home"
randompass=
fileline=
savedpwtype=
defaultclass=
defaultLgroup=
defaultgroups=
defaultshell="${DEFAULTSHELL}"

# Make sure the user running this program is root. This isn't a security
# measure as much as it is a usefull method of reminding the user to
# 'su -' before he/she wastes time entering data that won't be saved.
#
procowner=${procowner:-`/usr/bin/id -u`}
if [ "$procowner" != "0" ]; then
	err 'you must be the super-user (uid 0) to use this utility.'
	exit 1
fi

# Overide from our conf file
# Quickly go through the commandline line to see if we should read
# from our configuration file. The actual parsing of the commandline
# arguments happens after we read in our configuration file (commandline
# should override configuration file).
#
for _i in $* ; do
	if [ "$_i" = "-N" ]; then
		readconfig=
		break;
	fi
done
if [ -n "$readconfig" ]; then
	# On a long-lived system, the first time this script is run it
	# will barf upon reading the configuration file for its perl predecessor.
	if ( . ${ADDUSERCONF} > /dev/null 2>&1 ); then
		[ -r ${ADDUSERCONF} ] && . ${ADDUSERCONF} > /dev/null 2>&1
	fi
fi 

# Proccess command-line options
#
for _switch ; do
	case $_switch in
	-L)
		defaultclass="$2"
		shift; shift
		;;
	-C)
		configflag=yes
		shift
		;;
	-D)
		Dflag=yes
		shift
		;;
	-E)
		disableflag=yes
		shift
		;;
	-k)
		udotdir="$2"
		shift; shift
		;;
	-f)
		[ "$2" != "-" ] && infile="$2"
		fflag=yes
		shift; shift
		;;
	-g)
		defaultLgroup="$2"
		shift; shift
		;;
	-G)
		defaultgroups="$2"
		shift; shift
		;;
	-h)
		show_usage
		exit 0
		;;
	-d)
		homeprefix="$2"
		shift; shift
		;;
	-m)
		case "$2" in
		[Nn][Oo])
			msgflag=
			;;
		*)
			msgflag=yes
			msgfile="$2"
			;;
		esac
		shift; shift
		;;
	-N)
		readconfig=
		shift
		;;
	-w)
		case "$2" in
		no|none|random|yes)
			passwdtype=$2
			;;
		*)
			show_usage
			exit 1
			;;
		esac
		shift; shift
		;;
	-q)
		quietflag=yes
		shift
		;;
	-s)
		defaultshell="`fullpath_from_shell $2`"
		shift; shift
		;;
	-S)
		Sflag=yes
		shift
		;;
	-u)
		uidstart=$2
		shift; shift
		;;
	esac
done

# If the -f switch was used, get input from a file. Otherwise,
# this is an interactive session.
#
if [ -n "$fflag" ]; then
	if [ -z "$infile" ]; then
		input_from_file
	elif [ -n "$infile" ]; then
		if [ -r "$infile" ]; then
			input_from_file < $infile
		else
			err "File ($infile) is unreadable or does not exist."
		fi
	fi
else
	input_interactive
	while : ; do
		if [ -z "$configflag" ]; then
			echo -n "Add another user? (yes/no): "
		else
			echo -n "Re-edit the default configuration? (yes/no): "
		fi
		read _input
		case $_input in
		[Yy][Ee][Ss]|[Yy][Ee]|[Yy])
			uidstart=`get_nextuid $uidstart`
			input_interactive
			continue
			;;
		[Nn][Oo]|[Nn])
			echo "Goodbye!"
			;;
		*)
			continue
			;;
		esac
		break
	done
fi
OpenPOWER on IntegriCloud