aboutsummaryrefslogblamecommitdiffstats
path: root/lib/snmp/src/misc/snmp_config.erl
blob: 91a6550b0a92c0d358a44492c65a6c15ad9bc1fb (plain) (tree)
1
2
3
4
5
6
7
8
9
10
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
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
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166

                   


                                                        




                                                                      
  



                                                                         
  







                                        

                                                                           
















































































































































































































































































































                                                                                          



                                                                               


                                                                  

                                                                     




































































                                                                                   





























                                                                              

                                                    
                                                     

















































































































































































































































                                                                               



                                                                   

                                                       
                                                               

                                                            
                                                             



                                                            
                                                              

                                                                             




                                                                         
                                                      

                                                          






































































































































































































































































































































































































































































































































                                                                                                       






                                                     
























































                                                                           











                                                              


































































































































































































































































































































































































































                                                                                
                                                    



                                                                 
                                                    






                                                                               
                                                    











































































                                                                               
                                                       































































































































































































































































































































































                                                                              



                                                          










































                                                                  



















































                                                                               













































































































































































































                                                                            
%% 
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1996-2010. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%% 

-module(snmp_config).

-include_lib("kernel/include/file.hrl").
-include("snmp_types.hrl").

%% Avoid warning for local function error/1 clashing with autoimported BIF.
-compile({no_auto_import,[error/1]}).
-export([config/0]).

-export([write_config_file/4, append_config_file/4, read_config_file/3]).

-export([write_agent_snmp_files/7, write_agent_snmp_files/12,

	 write_agent_snmp_conf/5, 
	 write_agent_snmp_context_conf/1, 
	 write_agent_snmp_community_conf/1, 
	 write_agent_snmp_standard_conf/2, 
	 write_agent_snmp_target_addr_conf/4, 
	 write_agent_snmp_target_addr_conf/6, 
	 write_agent_snmp_target_params_conf/2, 
	 write_agent_snmp_notify_conf/2, 
	 write_agent_snmp_usm_conf/5, 
	 write_agent_snmp_vacm_conf/3, 

	 write_manager_snmp_files/8,
	 write_manager_snmp_conf/5, 
	 write_manager_snmp_users_conf/2, 
	 write_manager_snmp_agents_conf/2, 
	 write_manager_snmp_usm_conf/2
 	 
	]).

-export([write_agent_config/3, 
	 update_agent_config/2, 
	 
	 write_agent_context_config/3, 
	 update_agent_context_config/2, 
	 
	 write_agent_community_config/3, 
	 update_agent_community_config/2, 

	 write_agent_standard_config/3, 
	 update_agent_standard_config/2, 

	 write_agent_target_addr_config/3, 
	 update_agent_target_addr_config/2, 

	 write_agent_target_params_config/3, 
	 update_agent_target_params_config/2, 

	 write_agent_notify_config/3, 
	 update_agent_notify_config/2, 

	 write_agent_vacm_config/3, 
	 update_agent_vacm_config/2, 

	 write_agent_usm_config/3, 
	 update_agent_usm_config/2, 

	 write_manager_config/3, 
	 update_manager_config/2,

	 write_manager_users_config/3, 
	 update_manager_users_config/2,

	 write_manager_agents_config/3, 
	 update_manager_agents_config/2,

	 write_manager_usm_config/3, 
	 update_manager_usm_config/2
	]).


%%----------------------------------------------------------------------
%% Handy SNMP configuration
%%----------------------------------------------------------------------

config() ->
    case (catch config2()) of
	ok ->
	    ok;
	{error, Reason} ->
	    {error, Reason};
	E ->
	    {error, {failed, E}}
    end.


config2() ->
    intro(),
    SysAgentConfig = 
	case config_agent() of
	    [] ->
		[];
	    SAC ->
		[{agent, SAC}]
	end,
    SysMgrConfig   = 
	case config_manager() of
	    [] ->
		[];
	    SMC ->
		[{manager, SMC}]
	end,
    config_sys(SysAgentConfig ++ SysMgrConfig),
    ok.


intro() ->
    i("~nSimple SNMP configuration tool (version ~s)", [?version]),
    i("------------------------------------------------"),
    i("Note: Non-trivial configurations still has to be"),
    i("      done manually. IP addresses may be entered "),
    i("      as dront.ericsson.se (UNIX only) or"),
    i("      123.12.13.23"),
    i("------------------------------------------------"),
    ok.


config_agent() ->
    case (catch snmp_agent2()) of
	ok ->
	    [];
	{ok, SysConf} ->
	    SysConf;
	{error, Reason} ->
	    error(Reason);
	{'EXIT', Reason} ->
	    error(Reason);
	E ->
	    error({agent_config_failed, E})
    end.

snmp_agent2() ->
    case ask("~nConfigure an agent (y/n)?", "y", fun verify_yes_or_no/1) of
	yes ->
	    {Vsns, ConfigDir, SysConf} = config_agent_sys(),
	    config_agent_snmp(ConfigDir, Vsns),
	    {ok, SysConf};
	no ->
	    ok
    end.


config_manager() ->
    case (catch config_manager2()) of
	ok ->
	    [];
	{ok, SysConf} ->
	    SysConf;
	{error, Reason} ->
	    error(Reason);
	{'EXIT', Reason} ->
	    error(Reason);
	E ->
	    error({manager_config_failed, E})
    end.

config_manager2() ->
    case ask("~nConfigure a manager (y/n)?", "y", fun verify_yes_or_no/1) of
	yes ->
	    {Vsns, ConfigDir, SysConf} = config_manager_sys(),
 	    config_manager_snmp(ConfigDir, Vsns),
	    {ok, SysConf};
	no ->
	    ok
    end.


config_sys(SysConfig) ->
    i("~n--------------------"),
    {ok, DefDir} = file:get_cwd(),
    ConfigDir = ask("Configuration directory for system file (absolute path)?",
		    DefDir, fun verify_dir/1),    
    write_sys_config_file(ConfigDir, SysConfig).


%% -------------------

config_agent_sys() ->
    i("~nAgent system config: "
      "~n--------------------"),
    Prio = ask("1. Agent process priority (low/normal/high)", 
	       "normal", fun verify_prio/1),
    Vsns = ask("2. What SNMP version(s) should be used "
	       "(1,2,3,1&2,1&2&3,2&3)?", "3", fun verify_versions/1),
    %% d("Vsns: ~p", [Vsns]),
    {ok, DefDir} = file:get_cwd(),
    {DefConfDir, Warning} = default_agent_dir(DefDir),
    ConfQ = 
	if
	    Warning == "" ->
		"3. Configuration directory (absolute path)?";
	    true ->
		lists:flatten(
		  io_lib:format("3. Configuration directory (absolute path)?" 
				"~n   ~s", [Warning]))
	end,
    ConfigDir = ask(ConfQ, DefConfDir, fun verify_dir/1),
    ConfigVerb = ask("4. Config verbosity "
		     "(silence/info/log/debug/trace)?", 
		     "silence",
		     fun verify_verbosity/1),
    DbDir     = ask("5. Database directory (absolute path)?", DefDir, 
		    fun verify_dir/1),
    MibStorageType = ask("6. Mib storage type (ets/dets/mnesia)?", "ets",
			 fun verify_mib_storage_type/1),
    MibStorage = 
	case MibStorageType of
	    ets ->
		ets;
	    dets ->
		DetsDir = ask("6b. Mib storage directory (absolute path)?",
			      DbDir, fun verify_dir/1),
		DetsAction = ask("6c. Mib storage [dets] database start "
				 "action "
				 "(default/clear/keep)?", 
				 "default", fun verify_mib_storage_action/1),
		case DetsAction of
		    default ->
			{dets, DetsDir};
		    _ ->
			{dets, DetsDir, DetsAction}
		end;
	    mnesia ->
% 		Nodes = ask("Mib storage nodes?", "none", 
% 			    fun verify_mib_storage_nodes/1),
		Nodes = [],
		MnesiaAction = ask("6b. Mib storage [mnesia] database start "
				   "action "
				   "(default/clear/keep)?", 
				   "default", fun verify_mib_storage_action/1),
		case MnesiaAction of
		    default ->
			{mnesia, Nodes};
		    _ ->
			{mnesia, Nodes, MnesiaAction}
		end
	end,
    TargetCacheVerb = ask("7. Target cache verbosity "
			  "(silence/info/log/debug/trace)?", "silence",
			  fun verify_verbosity/1),
    SymStoreVerb = ask("8. Symbolic store verbosity "
		       "(silence/info/log/debug/trace)?", "silence",
		       fun verify_verbosity/1),
    LocalDbVerb = ask("9. Local DB verbosity "
		       "(silence/info/log/debug/trace)?", "silence",
		       fun verify_verbosity/1),
    LocalDbRepair = ask("10. Local DB repair (true/false/force)?", "true",
			fun verify_dets_repair/1),
    LocalDbAutoSave = ask("11. Local DB auto save (infinity/milli seconds)?", 
			  "5000", fun verify_dets_auto_save/1),
    ErrorMod = ask("12. Error report module?", "snmpa_error_logger", fun verify_module/1),
    Type = ask("13. Agent type (master/sub)?", "master", 
	       fun verify_agent_type/1),
    AgentConfig = 
	case Type of 
	    master ->
		MasterAgentVerb = ask("14. Master-agent verbosity "
				      "(silence/info/log/debug/trace)?", 
				      "silence",
				      fun verify_verbosity/1),
		ForceLoad = ask("15. Shall the agent re-read the "
				"configuration files during startup ~n"
				"    (and ignore the configuration "
				"database) (true/false)?", "true", 
				fun verify_bool/1),
		MultiThreaded = ask("16. Multi threaded agent (true/false)?", 
				    "false",
				    fun verify_bool/1),
		MeOverride = ask("17. Check for duplicate mib entries when "
				 "installing a mib (true/false)?", "false",
				 fun verify_bool/1),
		TrapOverride = ask("18. Check for duplicate trap names when "
				   "installing a mib (true/false)?", "false",
				   fun verify_bool/1),
		MibServerVerb = ask("19. Mib server verbosity "
				    "(silence/info/log/debug/trace)?", 
				    "silence",
				    fun verify_verbosity/1),
		MibServerCache = ask("20. Mib server cache "
				    "(true/false)?", 
				    "true",
				    fun verify_bool/1),
		NoteStoreVerb = ask("21. Note store verbosity "
				    "(silence/info/log/debug/trace)?", 
				    "silence",
				    fun verify_verbosity/1),
		NoteStoreTimeout = ask("22. Note store GC timeout?", "30000",
				       fun verify_timeout/1),
		ATL = 
		    case ask("23. Shall the agent use an audit trail log "
			     "(y/n)?",
			     "n", fun verify_yes_or_no/1) of
			yes ->
			    ATLType = ask("23b. Audit trail log type "
					  "(write/read_write)?",
					  "read_write", fun verify_atl_type/1),
			    ATLDir = ask("23c. Where to store the "
					 "audit trail log?",
					 DefDir, fun verify_dir/1),
			    ATLMaxFiles = ask("23d. Max number of files?", 
					      "10", 
					      fun verify_pos_integer/1),
			    ATLMaxBytes = ask("23e. Max size (in bytes) "
					      "of each file?", 
					      "10240", 
					      fun verify_pos_integer/1),
			    ATLSize = {ATLMaxBytes, ATLMaxFiles},
			    ATLRepair = ask("23f. Audit trail log repair "
					    "(true/false/truncate/snmp_repair)?", "true",
					    fun verify_atl_repair/1),
			    ATLSeqNo = ask("23g. Audit trail log "
					   "sequence-numbering (true/false)?", 
					   "false",
					   fun verify_atl_seqno/1),
			    [{audit_trail_log, [{type,   ATLType},
						{dir,    ATLDir},
						{size,   ATLSize},
						{repair, ATLRepair},
						{seqno, ATLSeqNo}]}];
			no ->
			    []
		    end,
		NetIfVerb = ask("24. Network interface verbosity "
				"(silence/info/log/debug/trace)?", 
				"silence",
				fun verify_verbosity/1),
		NetIfMod = ask("25. Which network interface module shall be used?",
			       "snmpa_net_if", fun verify_module/1),
		NetIfOpts = 
		    case NetIfMod of
			snmpa_net_if ->
			    NetIfBindTo = 
				ask("25a. Bind the agent IP address "
				    "(true/false)?",
				    "false", fun verify_bool/1),
			    NetIfNoReuse = 
				ask("25b. Shall the agents "
				    "IP address "
				    "and port be not reusable "
				    "(true/false)?",
				    "false", fun verify_bool/1),
			    NetIfReqLimit = 
				ask("25c. Agent request limit "
				    "(used for flow control) "
				    "(infinity/pos integer)?", 
				    "infinity",
				    fun verify_netif_req_limit/1),
			    NetIfRecbuf = 
				case ask("25d. Receive buffer size of the "
					 "agent (in bytes) "
					 "(default/pos integer)?", 
					 "default", 
					 fun verify_netif_recbuf/1) of
				    default ->
					[];
				    RecBufSz ->
					[{recbuf, RecBufSz}]
				end,
			    NetIfSndbuf = 
				case ask("25e. Send buffer size of the agent "
					 "(in bytes) (default/pos integer)?", 
					 "default", 
					 fun verify_netif_sndbuf/1) of
				    default ->
					[];
				    SndBufSz ->
					[{sndbuf, SndBufSz}]
				end,
			    NetIfFilter = 
				case ask("25f. Do you wish to specify a "
					 "network interface filter module "
					 "(or use default)",
					 "default", fun verify_module/1) of
				    default ->
					[];
				    NetIfFilterMod ->
					[{filter, [{module, NetIfFilterMod}]}]
				end,
			    [{bind_to,   NetIfBindTo},
			     {no_reuse,  NetIfNoReuse},
			     {req_limit, NetIfReqLimit}] ++ 
				NetIfRecbuf ++ NetIfSndbuf ++ NetIfFilter;
			_ ->
			    []
		    end,
		NetIf = [{module,    NetIfMod},
			 {verbosity, NetIfVerb},
			 {options,   NetIfOpts}],
		TermDiscoEnable = ask("26a. Allow terminating discovery "
				      "(true/false)?", "true",
				      fun verify_bool/1),
		TermDiscoConf = 
		    case TermDiscoEnable of
			true ->
			    TermDiscoStage2 = 
				ask("26b. Second stage behaviour "
				    "(discovery/plain)?", "discovery",
				    fun verify_term_disco_behaviour/1),
			    TermDiscoTrigger = 
				ask("26c. Trigger username "
				    "(default/a string)?", "default",
				    fun verify_term_disco_trigger_username/1),
			    [{enable, TermDiscoEnable},
			     {stage2, TermDiscoStage2},
			     {trigger_username, TermDiscoTrigger}];
			false ->
			    [{enable, TermDiscoEnable},
			     {stage2, discovery},
			     {trigger_username, ""}]
		    end,
		OrigDiscoEnable = ask("27a. Allow originating discovery "
				      "(true/false)?", "true",
				      fun verify_bool/1),
		OrigDiscoConf = 
		    [{enable, OrigDiscoEnable}], 
		DiscoveryConfig = 
		    [{terminating, TermDiscoConf},
		     {originating, OrigDiscoConf}], 
		[{agent_type,      master},
		 {agent_verbosity, MasterAgentVerb},
		 {discovery,       DiscoveryConfig}, 
		 {config,          [{dir,        ConfigDir}, 
				    {force_load, ForceLoad},
				    {verbosity,  ConfigVerb}]},
		 {multi_threaded,  MultiThreaded},
		 {mib_server,      [{mibentry_override,  MeOverride},
				    {trapentry_override, TrapOverride},
				    {verbosity,          MibServerVerb},
				    {cache,              MibServerCache}]},
		 {note_store,      [{timeout,   NoteStoreTimeout},
				    {verbosity, NoteStoreVerb}]},
		 {net_if, NetIf}] ++ ATL;
	    sub ->
		SubAgentVerb = ask("14. Sub-agent verbosity "
				   "(silence/info/log/debug/trace)?", 
				   "silence",
				   fun verify_verbosity/1),
		[{agent_type,      sub},
		 {agent_verbosity, SubAgentVerb},
		 {config,          [{dir, ConfigDir}]}]
	end,
    SysConfig = 
	[{priority,    Prio},
	 {versions,    Vsns},
	 {db_dir,      DbDir},
	 {mib_storage, MibStorage},
	 {target_cache, [{verbosity, TargetCacheVerb}]},
	 {symbolic_store, [{verbosity, SymStoreVerb}]},
	 {local_db, [{repair,    LocalDbRepair},
		     {auto_save, LocalDbAutoSave},
		     {verbosity, LocalDbVerb}]},
	 {error_report_module, ErrorMod}] ++ AgentConfig,
    {Vsns, ConfigDir, SysConfig}.


config_agent_snmp(Dir, Vsns) ->
    i("~nAgent snmp config: "
      "~n------------------"),
    AgentName  = guess_agent_name(),
    EngineName = guess_engine_name(),
    SysName    = ask("1. System name (sysName standard variable)", 
		     AgentName, fun verify_system_name/1),
    EngineID   = ask("2. Engine ID (snmpEngineID standard variable)", 
		      EngineName, fun verify_engine_id/1),
    MMS        = ask("3. Max message size?", "484", 
		     fun verify_max_message_size/1),
    AgentUDP   = ask("4. The UDP port the agent listens to. "
		     "(standard 161)",
		     "4000", fun verify_port_number/1),
    Host       = host(),
    AgentIP    = ask("5. IP address for the agent (only used as id ~n"
		     "   when sending traps)", Host, fun verify_address/1),
    ManagerIP  = ask("6. IP address for the manager (only this manager ~n"
		     "   will have access to the agent, traps are sent ~n"
		     "   to this one)", Host, fun verify_address/1),
    TrapUdp    = ask("7. To what UDP port at the manager should traps ~n"
		     "   be sent (standard 162)?", "5000", 
		     fun verify_port_number/1),
    SecType    = ask("8. Do you want a none- minimum- or semi-secure"
		     " configuration? ~n"
		     "   Note that if you chose v1 or v2, you won't get any"
		     " security for these~n"
		     "   requests (none, minimum, semi_des, semi_aes)", 
		     "minimum", 
		    fun verify_sec_type/1),
    Passwd = 
	case lists:member(v3, Vsns) and (SecType /= none) of
	    true ->
		ensure_crypto_started(),
		ask("8b. Give a password of at least length 8. It is used to "
		    "generate ~n"
		    "    private keys for the configuration: ",
		    mandatory, fun verify_passwd/1);
	    false ->
		""
	end,
    NotifType  =
	case lists:member(v1, Vsns) of
	    true ->
		Overwrite = ask("9. Current configuration files will "
				"now be overwritten. "
				"Ok (y/n)?", "y", fun verify_yes_or_no/1),
		case Overwrite of
		    no ->
			error(overwrite_not_allowed);
		    yes ->
			ok
		end,
		trap;
	    false ->
		NT = ask("9. Should notifications be sent as traps or informs "
			 "(trap/inform)?", "trap", fun verify_notif_type/1),
		Overwrite = ask("10. Current configuration files will "
				"now be overwritten. "
				"Ok (y/n)?", "y", fun verify_yes_or_no/1),
		case Overwrite of
		    no ->
			error(overwrite_not_allowed);
		    yes ->
			ok
		end,
		NT
	end,
    case (catch write_agent_snmp_files(Dir, 
				       Vsns, ManagerIP, TrapUdp, 
				       AgentIP, AgentUDP,
				       SysName, NotifType, SecType, 
				       Passwd, EngineID, MMS)) of
	ok ->
	   i("~n- - - - - - - - - - - - -"),
	   i("Info: 1. SecurityName \"initial\" has noAuthNoPriv read access~n"
	     "         and authenticated write access to the \"restricted\"~n"
	     "         subtree."),
	   i("      2. SecurityName \"all-rights\" has noAuthNoPriv "
	     "read/write~n"
	     "         access to the \"internet\" subtree."),
	   i("      3. Standard traps are sent to the manager."),
	   case lists:member(v1, Vsns) or lists:member(v2, Vsns) of
	       true ->
		   i("      4. Community \"public\" is mapped to security name"
		     " \"initial\"."),
		   i("      5. Community \"all-rights\" is mapped to security"
		     " name \"all-rights\".");
	       false ->
		   ok
	   end,
	   i("The following agent files were written: agent.conf, "
	     "community.conf,~n"
	     "standard.conf, target_addr.conf, "
	     "target_params.conf, ~n"
	     "notify.conf" ++
	     case lists:member(v3, Vsns) of
		 true -> ", vacm.conf and usm.conf";
		 false -> " and vacm.conf"
	     end),
	   i("- - - - - - - - - - - - -"),
	   ok;
	E -> 
	    error({failed_writing_files, E})
    end.


%% -------------------

config_manager_sys() ->
    i("~nManager system config: "
      "~n----------------------"),
    Prio = ask("1. Manager process priority (low/normal/high)", 
	       "normal", fun verify_prio/1),
    Vsns = ask("2. What SNMP version(s) should be used "
	       "(1,2,3,1&2,1&2&3,2&3)?", "3", fun verify_versions/1),
    {ok, DefDir} = file:get_cwd(),
    {DefConfDir, Warning} = default_manager_dir(DefDir),
    ConfQ = 
	if
	    Warning == "" ->
		"3. Configuration directory (absolute path)?";
	    true ->
		lists:flatten(
		  io_lib:format("3. Configuration directory (absolute path)?" 
				"~n   ~s", [Warning]))
	end,
    ConfigDir = ask(ConfQ, DefConfDir, fun verify_dir/1),
    ConfigVerb = ask("4. Config verbosity "
			"(silence/info/log/debug/trace)?", 
			"silence",
			fun verify_verbosity/1),
    ConfigDbDir = ask("5. Database directory (absolute path)?", 
		      DefDir, fun verify_dir/1),
    ConfigDbRepair = ask("6. Database repair "
			 "(true/false/force)?", "true",
			 fun verify_dets_repair/1),
    ConfigDbAutoSave = ask("7. Database auto save "
			   "(infinity/milli seconds)?", 
			   "5000", fun verify_dets_auto_save/1),
    IRB = 
	case ask("8. Inform request behaviour (auto/user)?", 
		 "auto", fun verify_irb/1) of
	    auto ->
		auto;
	    user ->
		case ask("8b. Use default GC timeout"
			 "(default/seconds)?",
			 "default", fun verify_irb_user/1) of
		    default ->
			user;
		    IrbGcTo ->
			{user, IrbGcTo}
		end
	end,
    ServerVerb = ask("9. Server verbosity "
			"(silence/info/log/debug/trace)?", 
			"silence",
			fun verify_verbosity/1),
    ServerTimeout = ask("10. Server GC timeout?", "30000",
			   fun verify_timeout/1),    
    NoteStoreVerb = ask("11. Note store verbosity "
			"(silence/info/log/debug/trace)?", 
			"silence",
			fun verify_verbosity/1),
    NoteStoreTimeout = ask("12. Note store GC timeout?", "30000",
			   fun verify_timeout/1),    
    NetIfMod = ask("13. Which network interface module shall be used?",
		   "snmpm_net_if", fun verify_module/1),
    NetIfVerb = ask("14. Network interface verbosity "
		    "(silence/info/log/debug/trace)?", "silence",
		    fun verify_verbosity/1),
    NetIfBindTo = ask("15. Bind the manager IP address "
		      "(true/false)?",
		      "false", fun verify_bool/1),
    NetIfNoReuse = ask("16. Shall the manager IP address and port "
		       "be not reusable (true/false)?",
		       "false", fun verify_bool/1),
    NetIfRecbuf = 
	case ask("17. Receive buffer size of the manager (in bytes) "
		 "(default/pos integer)?", "default", 
		 fun verify_netif_recbuf/1) of
	    default ->
		[];
	    RecBufSz ->
		[{recbuf, RecBufSz}]
	end,
    NetIfSndbuf = 
	case ask("18. Send buffer size of the manager (in bytes) "
		 "(default/pos integer)?", "default", 
		 fun verify_netif_sndbuf/1) of
	    default ->
		[];
	    SndBufSz ->
		[{sndbuf, SndBufSz}]
	end,
    NetIfOpts = 
	[{bind_to,   NetIfBindTo},
	 {no_reuse,  NetIfNoReuse}] ++ NetIfRecbuf ++ NetIfSndbuf,
    NetIf = 
	[{module,    NetIfMod},
	 {verbosity, NetIfVerb},
	 {options,   NetIfOpts}], 
    ATL = 
	case ask("19. Shall the manager use an audit trail log "
		 "(y/n)?",
		 "n", fun verify_yes_or_no/1) of
	    yes ->
		ATLType = ask("19b. Audit trail log type "
			      "(write/read_write)?",
			      "read_write", fun verify_atl_type/1),
		ATLDir = ask("19c. Where to store the "
			     "audit trail log?",
			     DefDir, fun verify_dir/1),
		ATLMaxFiles = ask("19d. Max number of files?", 
				  "10", 
				  fun verify_pos_integer/1),
		ATLMaxBytes = ask("19e. Max size (in bytes) "
				  "of each file?", 
				  "10240", 
				  fun verify_pos_integer/1),
		ATLSize = {ATLMaxBytes, ATLMaxFiles},
		ATLRepair = ask("19f. Audit trail log repair "
				"(true/false/truncate/snmp_repair)?", "true",
				fun verify_atl_repair/1),
		ATLSeqNo = ask("19g. Audit trail log sequence-numbering "
			       "(true/false)?", "false",
			       fun verify_atl_seqno/1),
		[{audit_trail_log, [{type,   ATLType},
				    {dir,    ATLDir},
				    {size,   ATLSize},
				    {repair, ATLRepair},
				    {seqno,  ATLSeqNo}]}];
	    no ->
		[]
	end,
    DefUser = 
	case ask("20. Do you wish to assign a default user [yes] or use~n"
		 "    the default settings [no] (y/n)?", "n", 
		 fun verify_yes_or_no/1) of
	    yes ->
		DefUserMod = ask("20b. Default user module?", 
				 "snmpm_user_default",
				 fun verify_module/1),
		DefUserData = ask("20c. Default user data?", "undefined",
				  fun verify_user_data/1),
		[{def_user_mod,  DefUserMod},
		 {def_user_data, DefUserData}];
	    no ->
		[]
	end,
    SysConfig = 
	[{priority,   Prio},
	 {versions,   Vsns},
	 {config,     [{dir,       ConfigDir}, 
		       {verbosity, ConfigVerb},
		       {db_dir,    ConfigDbDir},
		       {repair,    ConfigDbRepair},
		       {auto_save, ConfigDbAutoSave}]},
	 {inform_request_behaviour, IRB},
	 {mibs,       []},
	 {server,     [{timeout,   ServerTimeout},
		       {verbosity, ServerVerb}]},
	 {note_store, [{timeout,   NoteStoreTimeout},
		       {verbosity, NoteStoreVerb}]},
	 {net_if,     NetIf}] ++ ATL ++ DefUser,
    {Vsns, ConfigDir, SysConfig}.


config_manager_snmp(Dir, Vsns) ->
    i("~nManager snmp config: "
      "~n--------------------"),
    EngineName = guess_engine_name(),
    EngineID   = ask("1. Engine ID (snmpEngineID standard variable)", 
		      EngineName, fun verify_engine_id/1),
    MMS        = ask("2. Max message size?", "484", 
		     fun verify_max_message_size/1),
    Host       = host(),
    IP         = ask("3. IP address for the manager (only used as id ~n"
		     "   when sending requests)",
		     Host, fun verify_address/1),
    Port       = ask("4. Port number (standard 162)?", "5000", 
		     fun verify_port_number/1),
    Users      = config_manager_snmp_users([]),
    Agents     = config_manager_snmp_agents([]),
    Usms       = config_manager_snmp_usms([]),
    Overwrite = ask("8. Current configuration files will now be overwritten. "
		    "Ok (y/n)?", "y", fun verify_yes_or_no/1),
    case Overwrite of
	no ->
	    error(overwrite_not_allowed);
	yes ->
	    ok
    end,
    case (catch write_manager_snmp_files(Dir, 
					 IP, Port, MMS, EngineID, 
					 Users, Agents, Usms)) of
	ok ->
	   i("~n- - - - - - - - - - - - -"),
	   i("The following manager files were written: "
	     "manager.conf, agents.conf " ++ 
	     case lists:member(v3, Vsns) of
		 true ->
		     ", users.conf and usm.conf";
		 false ->
		     " and users.conf"
	     end),
	   i("- - - - - - - - - - - - -"),
	    ok;
	E ->
	    error({failed_writing_files, E})
    end.
	     

config_manager_snmp_users(Users) ->
    case ask("5. Configure a user of this manager (y/n)?",
	     "y", fun verify_yes_or_no/1) of
	yes ->
	    User = config_manager_snmp_user(),
	    config_manager_snmp_users([User|Users]);
	no ->
	    lists:reverse(Users)
    end.

config_manager_snmp_user() ->
    UserId   = ask("5b. User id?", mandatory, 
		   fun verify_user_id/1),
    UserMod  = ask("5c. User callback module?", mandatory, 
		   fun verify_module/1),
    UserData = ask("5d. User (callback) data?", "undefined",
		   fun verify_user_data/1),
    {UserId, UserMod, UserData}.
    

config_manager_snmp_agents(Agents) ->
    case ask("6. Configure an agent handled by this manager (y/n)?",
	     "y", fun verify_yes_or_no/1) of
	yes ->
	    Agent = config_manager_snmp_agent(),
	    config_manager_snmp_agents([Agent|Agents]);
	no ->
	    lists:reverse(Agents)
    end.

config_manager_snmp_agent() ->
    UserId     = ask("6b. User id?", mandatory, 
		     fun verify_user_id/1),
    TargetName = ask("6c. Target name?", guess_agent_name(),
		     fun verify_system_name/1),
    Version    = ask("6d. Version (1/2/3)?", "1",
	             fun verify_version/1),
    Comm       = ask("6e. Community string ?", "public",
	             fun verify_community/1),
    EngineID   = ask("6f. Engine ID (snmpEngineID standard variable)", 
	             guess_engine_name(), fun verify_engine_id/1),
    IP         = ask("6g. IP address for the agent", host(), 
	             fun verify_address/1),
    Port       = ask("6h. The UDP port the agent listens to. "
	             "(standard 161)", "4000", fun verify_port_number/1),
    Timeout    = ask("6i. Retransmission timeout (infinity/pos integer)?",
	             "infinity", fun verify_retransmission_timeout/1),    
    MMS        = ask("6j. Max message size?", "484", 
	             fun verify_max_message_size/1),
    SecModel   = ask("6k. Security model (any/v1/v2c/usm)?", "any", 
	             fun verify_sec_model/1),
    SecName    = ask("6l. Security name?", "\"initial\"", 
	             fun verify_sec_name/1),
    SecLevel   = ask("6m. Security level (noAuthNoPriv/authNoPriv/authPriv)?",
	             "noAuthNoPriv", fun verify_sec_level/1),
    {UserId,
     TargetName, Comm, IP, Port, EngineID, Timeout, MMS, 
     Version, SecModel, SecName, SecLevel}.


config_manager_snmp_usms(Usms) ->
    case ask("7. Configure an usm user handled by this manager (y/n)?",
	     "y", fun verify_yes_or_no/1) of
	yes ->
	    Usm = config_manager_snmp_usm(),
	    config_manager_snmp_usms([Usm|Usms]);
	no ->
	    lists:reverse(Usms)
    end.

config_manager_snmp_usm() ->
    EngineID = ask("7a. Engine ID", guess_engine_name(), 
		   fun verify_engine_id/1),
    UserName = ask("7b. User name?", mandatory, fun verify_usm_name/1),
    SecName  = ask("7c. Security name?", UserName,
		   fun verify_usm_sec_name/1),
    AuthP    = ask("7d. Authentication protocol (no/sha/md5)?", "no",
		   fun verify_usm_auth_protocol/1),
    AuthKey  = ask_auth_key("7e", AuthP), 
    PrivP    = ask("7e. Priv protocol (no/des/aes)?", "no",
		   fun verify_usm_priv_protocol/1),
    PrivKey  = ask_priv_key("7f", PrivP), 
    {EngineID, UserName,
     SecName, AuthP, AuthKey, PrivP, PrivKey}.


%% ------------------------------------------------------------------

is_members([], _Files) ->
    true;
is_members([H|T], Files) ->
    lists:member(H, Files) andalso is_members(T, Files).

default_agent_dir(DefDir) ->
    default_dir("agent", DefDir).

default_manager_dir(DefDir) ->
    default_dir("manager", DefDir).

default_dir(Component, DefDir) ->
    %% Look for the component dir, if found use that as default
    {ok, Files} = file:list_dir(DefDir),
    case lists:member(Component, Files) of
	true ->
	    {filename:join(DefDir, Component), ""};
	false ->
	    %% No luck, 
	    %% so check if cwd contains either agent and/or 
	    %% manager config files. If it does, issue a warning

	    %% Check for presence of agent config files
	    %% If all the agent config files are present,
	    %% issue a warning
	    AgentConfs = 
		[
		 "agent.conf",
		 "context.conf",
		 "community.conf",
		 "notify.conf",
		 "standard.conf",
		 "target_params.conf",
		 "target_addr.conf",
		 "usm.conf",	 
		 "vacm.conf"
		],
	    IsAgentDir = is_members(AgentConfs, Files),

	    %% Check for presence of manager config files
	    %% If all the manager config files are present,
	    %% issue a warning
	    ManagerConfs = 
		[
		 "agents.conf",
		 "manager.conf",
		 "users.conf",
		 "usm.conf"
		],
	    IsManagerDir = is_members(ManagerConfs, Files),
	    Warning = 
		if
		    IsAgentDir and IsManagerDir ->
			"Note that the default directory contains both agent and manager config files";
		    IsAgentDir ->
			"Note that the default directory contains agent config files";
		    IsManagerDir ->
			"Note that the default directory contains manager config files";
		    true ->
			""
		end,
	    {DefDir, Warning}
    end.


%% ------------------------------------------------------------------

ask_auth_key(_Prefix, usmNoAuthProtocol) ->
    "";
ask_auth_key(Prefix, usmHMACSHAAuthProtocol) ->
    ask(Prefix ++ "  Authentication [sha] key (length 0 or 20)?", "\"\"",
	fun verify_usm_auth_sha_key/1);
ask_auth_key(Prefix, usmHMACMD5AuthProtocol) ->
    ask(Prefix ++ "  Authentication [md5] key (length 0 or 16)?", "\"\"",
	fun verify_usm_auth_md5_key/1).

ask_priv_key(_Prefix, usmNoPrivProtocol) ->
    "";
ask_priv_key(Prefix, usmDESPrivProtocol) ->
    ask(Prefix ++ "  Priv [des] key (length 0 or 16)?", "\"\"",
	fun verify_usm_priv_des_key/1);
ask_priv_key(Prefix, usmAesCfb128Protocol) ->
    ask(Prefix ++ "  Priv [aes] key (length 0 or 16)?", "\"\"",
	fun verify_usm_priv_aes_key/1).


%% ------------------------------------------------------------------

verify_yes_or_no("y") ->
    {ok, yes};
verify_yes_or_no("yes") ->
    {ok, yes};
verify_yes_or_no("n") ->
    {ok, no};
verify_yes_or_no("no") ->
    {ok, no};
verify_yes_or_no(YON) ->
    {error, "invalid yes or no: " ++ YON}.


verify_prio("low") ->
    {ok, low};
verify_prio("normal") ->
    {ok, normal};
verify_prio("high") ->
    {ok, high};
verify_prio(Prio) ->
    {error, "invalid process priority: " ++ Prio}.


verify_system_name(Name) -> {ok, Name}.


verify_engine_id(Name) -> {ok, Name}.


verify_max_message_size(MMS) ->
    case (catch list_to_integer(MMS)) of
	I when is_integer(I) andalso (I >= 484) ->
	    {ok, I};
	I when is_integer(I) ->
	    {error, "invalid max message size (must be atleast 484): " ++ MMS};
	_ ->
	    {error, "invalid max message size: " ++ MMS}
    end.
	
 
verify_port_number(P) ->
    case (catch list_to_integer(P)) of
	N when is_integer(N) andalso (N > 0) ->
	    {ok, N};
	_ ->
	    {error, "invalid port number: " ++ P}
    end.


verify_versions("1")     -> {ok, [v1]};
verify_versions("2")     -> {ok, [v2]};
verify_versions("3")     -> {ok, [v3]};
verify_versions("1&2")   -> {ok, [v1,v2]};
verify_versions("1&3")   -> {ok, [v1,v3]};
verify_versions("2&3")   -> {ok, [v2,v3]};
verify_versions("1&2&3") -> {ok, [v1,v2,v3]};
verify_versions(V)       -> {error, "incorrect version(s): " ++ V}.

verify_version("1")     -> {ok, v1};
verify_version("2")     -> {ok, v2};
verify_version("3")     -> {ok, v3};
verify_version(V)       -> {error, "incorrect version: " ++ V}.

    
verify_passwd(Passwd) when length(Passwd) >= 8 ->
    {ok, Passwd};
verify_passwd(_P) ->
    {error, "invalid password"}.


verify_dir(Dir) ->
    case filename:pathtype(Dir) of
	absolute -> 
	    case file:read_file_info(Dir) of
		{ok, #file_info{type = directory}} ->
		    {ok, snmp_misc:ensure_trailing_dir_delimiter(Dir)};
		{ok, _FileInfo} ->
		    {error, Dir ++ " is not a directory"};
		_ ->
		    {error, "invalid directory: " ++ Dir}
	    end;
	_E -> 
	    {error, "invalid directory (not absolute): " ++ Dir}
    end.
	    

verify_notif_type("trap")   -> {ok, trap};
verify_notif_type("inform") -> {ok, inform};
verify_notif_type(NT)       -> {error, "invalid notifcation type: " ++ NT}.


verify_sec_type("none")     -> {ok, none};
verify_sec_type("minimum")  -> {ok, minimum};
verify_sec_type("semi_des") -> {ok, {semi, des}};
verify_sec_type("semi_aes") -> {ok, {semi, aes}};
verify_sec_type(ST)         -> {error, "invalid security type: " ++ ST}.

    
verify_address(A) ->
    case (catch snmp_misc:ip(A)) of
	{ok, IP} ->
	     {ok, tuple_to_list(IP)};
	{error, _} ->
	    {error, "invalid address: " ++ A};
	_E ->
	    {error, "invalid address: " ++ A}
    end.


verify_mib_storage_type("m") ->
    {ok, mnesia};
verify_mib_storage_type("mnesia") ->
    {ok, mnesia};
verify_mib_storage_type("d") ->
    {ok, dets};
verify_mib_storage_type("dets") ->
    {ok, dets};
verify_mib_storage_type("e") ->
    {ok, ets};
verify_mib_storage_type("ets") ->
    {ok, ets};
verify_mib_storage_type(T) ->
    {error, "invalid mib storage type: " ++ T}.

verify_mib_storage_action("default") ->
    {ok, default};
verify_mib_storage_action("clear") ->
    {ok, clear};
verify_mib_storage_action("keep") ->
    {ok, keep};
verify_mib_storage_action(A) ->
    {error, "invalid mib storage action: " ++ A}.


verify_verbosity("silence") ->
    {ok, silence};
verify_verbosity("info") ->
    {ok, info};
verify_verbosity("log") ->
    {ok, log};
verify_verbosity("debug") ->
    {ok, debug};
verify_verbosity("trace") ->
    {ok, trace};
verify_verbosity(V) ->
    {error, "invalid verbosity: " ++ V}.


verify_dets_repair("true") ->
    {ok, true};
verify_dets_repair("false") ->
    {ok, false};
verify_dets_repair("force") ->
    {ok, force};
verify_dets_repair(R) ->
    {error, "invalid repair: " ++ R}.

verify_dets_auto_save("infinity") ->
    {ok, infinity};
verify_dets_auto_save(I0) ->
    case (catch list_to_integer(I0)) of
	I when is_integer(I) andalso (I > 0) ->
	    {ok, I};
	_ -> 
	    {error, "invalid auto save timeout time: " ++ I0}
    end.


%% I know that this is a little of the edge, but...
verify_module(M0) ->
    case (catch list_to_atom(M0)) of
	M when is_atom(M) ->
	    {ok, M};
	_ ->
	    {error, "invalid module: " ++ M0}
    end.
	 

verify_agent_type("master") ->
    {ok, master};
verify_agent_type("sub") ->
    {ok, sub};
verify_agent_type(AT) ->
    {error, "invalid agent type: " ++ AT}.


verify_bool("true") ->
    {ok, true};
verify_bool("false") ->
    {ok, false};
verify_bool(B) ->
    {error, "invalid boolean: " ++ B}.


verify_timeout(T0) ->
    case (catch list_to_integer(T0)) of
	T when is_integer(T) andalso (T > 0) ->
	    {ok, T};
	_ ->
	    {error, "invalid timeout time: '" ++ T0 ++ "'"}
    end.


verify_retransmission_timeout("infinity") ->
    {ok, infinity};
verify_retransmission_timeout([${|R] = Timer) ->
    case lists:reverse(R) of
	[$}|R2] ->
	    case string:tokens(lists:reverse(R2), ", ") of
		[WaitForStr, FactorStr, IncrStr, RetryStr] ->
		    WaitFor = incr_timer_value(WaitForStr, 1),
		    Factor  = incr_timer_value(FactorStr,  1),
		    Incr    = incr_timer_value(IncrStr,    0),
		    Retry   = incr_timer_value(RetryStr,   0),
		    {ok, {WaitFor, Factor, Incr, Retry}};
		_ ->
		    {error, "invalid retransmission timer: '" ++ Timer ++ "'"}
	    end;
	_ ->
	    {error, "invalid retransmission timer: '" ++ Timer ++ "'"}
    end;
verify_retransmission_timeout(T0) ->
    case (catch list_to_integer(T0)) of
	T when is_integer(T) andalso (T > 0) ->
	    {ok, T};
	_ ->
	    {error, "invalid timeout time: '" ++ T0 ++ "'"}
    end.

incr_timer_value(Str, Min) ->
    case (catch list_to_integer(Str)) of
	I when is_integer(I) andalso (I >= Min) ->
	    I;
	I when is_integer(I) ->
	    E = lists:flatten(io_lib:format("invalid incremental timer value "
					    "(min value is ~w): " ++ Str, 
					    [Min])),
	    error(E);
	_ ->
	    error("invalid incremental timer value: " ++ Str)
    end.
	 

%% verify_atl_type("read") ->
%%     {ok, read};
verify_atl_type("write") ->
    {ok, write};
verify_atl_type("read_write") ->
    {ok, read_write};
verify_atl_type(T) ->
    {error, "invalid log type: " ++ T}.

verify_atl_repair("true") ->
    {ok, true};
verify_atl_repair("false") ->
    {ok, false};
verify_atl_repair("truncate") ->
    {ok, truncate};
verify_atl_repair("snmp_repair") ->
    {ok, snmp_repair};
verify_atl_repair(R) ->
    {error, "invalid audit trail log repair: " ++ R}.

verify_atl_seqno("true") ->
    {ok, true};
verify_atl_seqno("false") ->
    {ok, false};
verify_atl_seqno(SN) ->
    {error, "invalid audit trail log seqno: " ++ SN}.


verify_pos_integer(I0) ->
    case (catch list_to_integer(I0)) of
	I when is_integer(I) andalso (I > 0) ->
	    {ok, I};
	_ ->
	    {error, "invalid integer value: " ++ I0}
    end.


verify_netif_req_limit("infinity") ->
    {ok, infinity};
verify_netif_req_limit(I0) ->
    case (catch list_to_integer(I0)) of
	I when is_integer(I) andalso (I > 0) ->
	    {ok, I};
	_ ->
	    {error, "invalid network interface request limit: " ++ I0}
    end.

verify_netif_recbuf(Val) ->
    verify_netif_recbuf_or_sndbuf(Val, "recbuf").

verify_netif_sndbuf(Val) ->
    verify_netif_recbuf_or_sndbuf(Val, "sndbuf").

verify_netif_recbuf_or_sndbuf("default", _) ->
    {ok, default};
verify_netif_recbuf_or_sndbuf(I0, Buf) ->
    case (catch list_to_integer(I0)) of
	I when is_integer(I) andalso (I > 0) ->
	    {ok, I};
	_ ->
	    {error, "invalid network interface " ++ Buf ++ " size: " ++ I0}
    end.


verify_irb("auto") ->
    {ok, auto};
verify_irb("user") ->
    {ok, user};
verify_irb(IRB) ->
    E = lists:flatten(io_lib:format("invalid irb: ~p", [IRB])),
    {error, E}.


verify_irb_user("default") ->
    {ok, default};
verify_irb_user(TO) ->
    case (catch list_to_integer(TO)) of
	I when is_integer(I) andalso (I > 0) ->
	    {ok, I*1000}; % Time is given in seconds
	_ ->
	    {error, "invalid IRB GC time: " ++ TO}
    end.
    

verify_term_disco_behaviour("discovery") ->
    {ok, discovery};
verify_term_disco_behaviour("plain") ->
    {ok, plain};
verify_term_disco_behaviour(B) ->
    {error, "invalid terminating discovery behaviour: " ++ B}.

verify_term_disco_trigger_username("default") ->
    {ok, ""};
verify_term_disco_trigger_username(Trigger) ->
    {ok, Trigger}.


verify_user_id(UserId) when is_list(UserId) ->
    case (catch list_to_atom(UserId)) of
	A when is_atom(A) ->
	    {ok, A};
	_ ->
	    {error, "invalid user id: " ++ UserId}
    end;
verify_user_id(UserId) when is_atom(UserId) ->
    {ok, UserId};
verify_user_id(UserId) ->
    E = lists:flatten(io_lib:format("invalid user id: ~p", [UserId])),
    {error, E}.

verify_user_data("undefined") ->
    {ok, undefined};
verify_user_data(UserData) ->
    {ok, UserData}.


verify_community("\"\"") ->
    {ok, ""};
verify_community(Comm) ->
    {ok, Comm}.


% verify_context_name("\"\"") ->
%     {ok, ""};
% verify_context_name(Ctx) ->
%     {ok, Ctx}.


% verify_mp_model("v1") ->
%     {ok, v1};
% verify_mp_model("v2c") ->
%     {ok, v2c};
% verify_mp_model("v3") ->
%     {ok, v3};
% verify_mp_model(M) ->
%     {error, "invalid mp model: " ++ M}.


verify_sec_model("any") ->
    {ok, any};
verify_sec_model("v1") ->
    {ok, v1};
verify_sec_model("v2c") ->
    {ok, v2c};
verify_sec_model("usm") ->
    {ok, usm};
verify_sec_model(M) ->
    {error, "invalid sec model: " ++ M}.

verify_sec_name("\"initial\"") ->
    {ok, "initial"};
verify_sec_name(N) ->
    {ok, N}.


verify_sec_level("noAuthNoPriv") ->
    {ok, noAuthNoPriv};
verify_sec_level("authNoPriv") ->
    {ok, authNoPriv};
verify_sec_level("authPriv") ->
    {ok, authPriv};
verify_sec_level(L) ->
    {error, "invalid sec level: " ++ L}.


verify_usm_name(Name) ->
    {ok, Name}.

verify_usm_sec_name(Name) ->
    {ok, Name}.


verify_usm_auth_protocol("no") ->
    {ok, usmNoAuthProtocol};
verify_usm_auth_protocol("sha") ->
    {ok, usmHMACSHAAuthProtocol};
verify_usm_auth_protocol("md5") ->
    {ok, usmHMACMD5AuthProtocol};
verify_usm_auth_protocol(AuthP) ->
    {error, "invalid auth protocol: " ++ AuthP}.

verify_usm_auth_sha_key(Key) ->
    verify_usm_key("auth sha", Key, 20).

verify_usm_auth_md5_key(Key) ->
    verify_usm_key("auth md5", Key, 16).

verify_usm_priv_protocol("no") ->
    {ok, usmNoPrivProtocol};
verify_usm_priv_protocol("des") ->
    {ok, usmDESPrivProtocol};
verify_usm_priv_protocol("aes") ->
    {ok, usmAesCfb128Protocol};
verify_usm_priv_protocol(AuthP) ->
    {error, "invalid priv protocol: " ++ AuthP}.

verify_usm_priv_des_key(Key) ->
    verify_usm_key("priv des", Key, 16).

verify_usm_priv_aes_key(Key) ->
    verify_usm_key("priv aes", Key, 16).

verify_usm_key(_What, "\"\"", _ExpectLength) ->
    {ok, ""};
verify_usm_key(_What, Key, ExpectLength) when length(Key) =:= ExpectLength ->
    {ok, Key};
verify_usm_key(What, [$[|RestKey] = Key0, ExpectLength) ->
    case lists:reverse(RestKey) of
	[$]|RevRestKey] ->
	    Key1 = lists:reverse(RevRestKey),
	    verify_usm_key2(What, Key1, ExpectLength);
	_ ->
	    %% Its not a list ([...]) and its not the correct length, ...
	    {error, "invalid " ++ What ++ " key length: " ++ Key0}
    end;
verify_usm_key(What, Key, ExpectLength) ->
    verify_usm_key2(What, Key, ExpectLength).
    
verify_usm_key2(What, Key0, ExpectLength) ->
    case string:tokens(Key0, [$,]) of
	Key when length(Key) =:= ExpectLength ->
	    convert_usm_key(Key, []);
	_ ->
	    {error, "invalid " ++ What ++ " key length: " ++ Key0}
    end.
    
convert_usm_key([], Acc) ->
    {ok, lists:reverse(Acc)};
convert_usm_key([I|Is], Acc) ->
    case (catch list_to_integer(I)) of
	Int when is_integer(Int) ->
	    convert_usm_key(Is, [Int|Acc]);
	_Err ->
	    {error, "invalid key number: " ++ I}
    end.

	     
% ip(Host) ->
%     case catch snmp_misc:ip(Host) of
% 	{ok, IPtuple} -> tuple_to_list(IPtuple);
% 	{error, Reason} -> throw({error, Reason});
% 	_Q -> throw({error, {"ip conversion failed", Host}})
%     end.

% make_ip(Str) ->
%     case catch snmp_misc:ip(Str) of
% 	{ok, IPtuple} -> tuple_to_list(IPtuple);
% 	_Q -> ip(Str)
%     end.


print_q(Q, mandatory) ->
    io:format(Q ++ " ",[]);
print_q(Q, Default) when is_list(Default) ->
    io:format(Q ++ " [~s] ",[Default]).

%% Defval = string() | mandatory
ask(Q, Default, Verify) when is_list(Q) andalso is_function(Verify) ->
    print_q(Q, Default),
    PrelAnsw = io:get_line(''),
    Answer = 
	case remove_newline(PrelAnsw) of
	    "" when Default =/= mandatory -> Default;
	    "" -> ask(Q, Default, Verify);
	    A -> A
    end,
    case (catch Verify(Answer)) of
	{ok, Answer2} ->
	    Answer2;
	{error, ReasonStr} ->
	    i("ERROR: " ++ ReasonStr),
	    ask(Q, Default, Verify)
    end.


host() ->
    case (catch inet:gethostname()) of
	{ok, Name} ->
	    case (catch inet:getaddr(Name, inet)) of
		{ok, Addr} when is_tuple(Addr) ->
		    lists:flatten(
		      io_lib:format("~w.~w.~w.~w", tuple_to_list(Addr)));
		_ ->
		    "127.0.0.1"
	    end;
	_ -> 
	    "127.0.0.1"
    end.

guess_agent_name() ->
    case os:type() of
	{unix, _} ->
	    lists:append(remove_newline(os:cmd("echo $USER")), "'s agent");
	{_,_} -> "my agent"
    end.

guess_engine_name() ->
    case os:type() of
	{unix, _} ->
	    lists:append(remove_newline(os:cmd("echo $USER")), "'s engine");
	{_,_} -> "my engine"
    end.

% guess_user_id() ->
%     case os:type() of
% 	{unix, _} ->
% 	    lists:append(remove_newline(os:cmd("echo $USER")), "'s user");
% 	{_,_} -> "user_id"
%     end.

    
remove_newline(Str) -> 
    lists:delete($\n, Str).


%%======================================================================
%% File generation
%%======================================================================

%%----------------------------------------------------------------------
%% Dir: string()  (ex: "../conf/")
%% ManagerIP, AgentIP: [int(),int(),int(),int()]
%% TrapUdp, AgentUDP: integer()
%% SysName: string()
%%----------------------------------------------------------------------
write_agent_snmp_files(Dir, Vsns, ManagerIP, TrapUdp, 
		       AgentIP, AgentUDP, SysName) 
  when is_list(Dir) andalso 
       is_list(Vsns) andalso 
       is_list(ManagerIP) andalso 
       is_integer(TrapUdp) andalso 
       is_list(AgentIP) andalso 
       is_integer(AgentUDP) andalso 
       is_list(SysName) ->
    write_agent_snmp_files(Dir, Vsns, ManagerIP, TrapUdp, AgentIP, AgentUDP,
			   SysName, "trap", none, "", "agentEngine", 484).

%% 
%% ----- Agent config files generator functions -----
%% 

write_agent_snmp_files(Dir, Vsns, ManagerIP, TrapUdp, AgentIP, AgentUDP, 
		       SysName, NotifType, SecType, Passwd, EngineID, MMS) ->
    write_agent_snmp_conf(Dir, AgentIP, AgentUDP, EngineID, MMS),
    write_agent_snmp_context_conf(Dir),
    write_agent_snmp_community_conf(Dir),
    write_agent_snmp_standard_conf(Dir, SysName),
    write_agent_snmp_target_addr_conf(Dir, ManagerIP, TrapUdp, Vsns),
    write_agent_snmp_target_params_conf(Dir, Vsns),
    write_agent_snmp_notify_conf(Dir, NotifType),
    write_agent_snmp_usm_conf(Dir, Vsns, EngineID, SecType, Passwd),
    write_agent_snmp_vacm_conf(Dir, Vsns, SecType),
    ok.


%% 
%% ------ [agent] agent.conf ------
%% 

write_agent_snmp_conf(Dir, AgentIP, AgentUDP, EngineID, MMS) -> 
    Comment = 
"%% This file defines the Agent local configuration info\n"
"%% The data is inserted into the snmpEngine* variables defined\n"
"%% in SNMP-FRAMEWORK-MIB, and the intAgent* variables defined\n"
"%% in OTP-SNMPEA-MIB.\n"
"%% Each row is a 2-tuple:\n"
"%% {AgentVariable, Value}.\n"
"%% For example\n"
"%% {intAgentUDPPort, 4000}.\n"
"%% The ip address for the agent is sent as id in traps.\n"
"%% {intAgentIpAddress, [127,42,17,5]}.\n"
"%% {snmpEngineID, \"agentEngine\"}.\n"
"%% {snmpEngineMaxMessageSize, 484}.\n"
"%%\n\n",
    Hdr = header() ++ Comment, 
    Conf = [{intAgentUDPPort,          AgentUDP}, 
	    {intAgentIpAddress,        AgentIP},
	    {snmpEngineID,             EngineID},
	    {snmpEngineMaxMessageSize, MMS}],
    write_agent_config(Dir, Hdr, Conf).

write_agent_config(Dir, Hdr, Conf) ->
    snmpa_conf:write_agent_config(Dir, Hdr, Conf).
    
update_agent_config(Dir, Conf) ->
    snmpa_conf:append_agent_config(Dir, Conf).
    

%% 
%% ------ [agent] context.conf ------
%% 

write_agent_snmp_context_conf(Dir) ->
    Comment = 
"%% This file defines the contexts known to the agent.\n"
"%% The data is inserted into the vacmContextTable defined\n"
"%% in SNMP-VIEW-BASED-ACM-MIB.\n"
"%% Each row is a string:\n"
"%% ContextName.\n"
"%%\n"
"%% The empty string is the default context.\n"
"%% For example\n"
"%% \"bridge1\".\n"
"%% \"bridge2\".\n"
"%%\n\n",
    Hdr = header() ++ Comment,
    Conf = [""],
    write_agent_context_config(Dir, Hdr, Conf).

write_agent_context_config(Dir, Hdr, Conf) ->
    snmpa_conf:write_context_config(Dir, Hdr, Conf).

update_agent_context_config(Dir, Conf) ->
    snmpa_conf:append_context_config(Dir, Conf).

    
%% 
%% ------ community.conf ------
%% 

write_agent_snmp_community_conf(Dir) ->
    Comment = 
"%% This file defines the community info which maps to VACM parameters.\n"
"%% The data is inserted into the snmpCommunityTable defined\n"
"%% in SNMP-COMMUNITY-MIB.\n"
"%% Each row is a 5-tuple:\n"
"%% {CommunityIndex, CommunityName, SecurityName, ContextName, TransportTag}.\n"
"%% For example\n"
"%% {\"1\", \"public\", \"initial\", \"\", \"\"}.\n"
"%% {\"2\", \"secret\", \"secret_name\", \"\", \"tag\"}.\n"
"%% {\"3\", \"bridge1\", \"initial\", \"bridge1\", \"\"}.\n"
"%%\n\n",
    Hdr = header() ++ Comment,
    Conf = [{"public", "public", "initial", "", ""}, 
	    {"all-rights", "all-rights", "all-rights", "", ""}, 
	    {"standard trap", "standard trap", "initial", "", ""}], 
    write_agent_community_config(Dir, Hdr, Conf).

write_agent_community_config(Dir, Hdr, Conf) ->
    snmpa_conf:write_community_config(Dir, Hdr, Conf).

update_agent_community_config(Dir, Conf) ->
    snmpa_conf:append_community_config(Dir, Conf).
    

%% 
%% ------ standard.conf ------
%% 

write_agent_snmp_standard_conf(Dir, SysName) ->
    Comment = 
"%% This file defines the STANDARD-MIB info.\n"
"%% Each row is a 2-tuple:\n"
"%% {StandardVariable, Value}.\n"
"%% For example\n"
"%% {sysDescr, \"Erlang SNMP agent\"}.\n"
"%% {sysObjectID, [1,2,3]}.\n"
"%% {sysContact, \"{mbj,eklas}@erlang.ericsson.se\"}.\n"
"%% {sysName, \"test\"}.\n"
"%% {sysLocation, \"erlang\"}.\n"
"%% {sysServices, 72}.\n"
"%% {snmpEnableAuthenTraps, enabled}.\n"
"%%\n\n",
    Hdr = header() ++ Comment,
    Conf = [{sysDescr,              "Erlang SNMP agent"},
	    {sysObjectID,           [1,2,3]},
	    {sysContact,            "{mbj,eklas}@erlang.ericsson.se"},
	    {sysLocation,           "erlang"}, 
	    {sysServices,           72}, 
	    {snmpEnableAuthenTraps, enabled},
	    {sysName,               SysName}],
    write_agent_standard_config(Dir, Hdr, Conf).

write_agent_standard_config(Dir, Hdr, Conf) ->
    snmpa_conf:write_standard_config(Dir, Hdr, Conf).

update_agent_standard_config(Dir, Conf) ->
    snmpa_conf:append_standard_config(Dir, Conf).


%% 
%% ------ target_addr.conf ------
%% 

write_agent_snmp_target_addr_conf(Dir, ManagerIp, UDP, Vsns) -> 
    Timeout    = 1500, 
    RetryCount = 3, 
    write_agent_snmp_target_addr_conf(Dir, ManagerIp, UDP, 
				      Timeout, RetryCount, 
				      Vsns).

write_agent_snmp_target_addr_conf(Dir, ManagerIp, UDP, 
				  Timeout, RetryCount, 
				  Vsns) -> 
    Comment = 
"%% This file defines the target address parameters.\n"
"%% The data is inserted into the snmpTargetAddrTable defined\n"
"%% in SNMP-TARGET-MIB, and in the snmpTargetAddrExtTable defined\n"
"%% in SNMP-COMMUNITY-MIB.\n"
"%% Each row is a 10-tuple:\n"
"%% {Name, Ip, Udp, Timeout, RetryCount, TagList, ParamsName, EngineId,\n"
"%%        TMask, MaxMessageSize}.\n"
"%% The EngineId value is only used if Inform-Requests are sent to this\n"
"%% target.  If Informs are not sent, this value is ignored, and can be\n"
"%% e.g. an empty string.  However, if Informs are sent, it is essential\n"
"%% that the value of EngineId matches the value of the target's\n"
"%% actual snmpEngineID.\n"
"%% For example\n"
"%% {\"1.2.3.4 v1\", [1,2,3,4], 162, \n"
"%%  1500, 3, \"std_inform\", \"otp_v2\", \"\",\n"
"%%  [127,0,0,0],  2048}.\n"
"%%\n\n",
    Hdr = header() ++ Comment,
    F = fun(v1 = Vsn, Acc) ->
		[{mk_ip(ManagerIp, Vsn), 
		  snmp_target_mib:default_domain(), 
		  ManagerIp, UDP, Timeout, RetryCount, 
		  "std_trap", mk_param(Vsn), "", [], 2048}| Acc];
	   (v2 = Vsn, Acc) ->
		[{mk_ip(ManagerIp, Vsn), 
		  snmp_target_mib:default_domain(), 
		  ManagerIp, UDP, Timeout, RetryCount, 
		  "std_trap", mk_param(Vsn), "", [], 2048},
		 {lists:flatten(io_lib:format("~s.2",[mk_ip(ManagerIp, Vsn)])),
		  ManagerIp, UDP, Timeout, RetryCount, 
		  "std_inform", mk_param(Vsn), "", [], 2048}| Acc];
	   (v3 = Vsn, Acc) ->
		[{mk_ip(ManagerIp, Vsn), 
		  snmp_target_mib:default_domain(), 
		  ManagerIp, UDP, Timeout, RetryCount, 
		  "std_trap", mk_param(Vsn), "", [], 2048},
		 {lists:flatten(io_lib:format("~s.3",[mk_ip(ManagerIp, Vsn)])),
		  ManagerIp, UDP, Timeout, RetryCount, 
		  "std_inform", mk_param(Vsn), "mgrEngine", [], 2048}| Acc]
	end,
    Conf = lists:foldl(F, [], Vsns),
    write_agent_target_addr_config(Dir, Hdr, Conf).

mk_param(Vsn) ->
    lists:flatten(io_lib:format("target_~w", [Vsn])).

mk_ip([A,B,C,D], Vsn) ->
    lists:flatten(io_lib:format("~w.~w.~w.~w ~w", [A,B,C,D,Vsn])).

write_agent_target_addr_config(Dir, Hdr, Conf) ->
    snmpa_conf:write_target_addr_config(Dir, Hdr, Conf).

update_agent_target_addr_config(Dir, Conf) ->
    snmpa_conf:append_target_addr_config(Dir, Conf).


%% 
%% ------ target_params.conf ------
%% 

write_agent_snmp_target_params_conf(Dir, Vsns) -> 
    Comment = 
"%% This file defines the target parameters.\n"
"%% The data is inserted into the snmpTargetParamsTable defined\n"
"%% in SNMP-TARGET-MIB.\n"
"%% Each row is a 5-tuple:\n"
"%% {Name, MPModel, SecurityModel, SecurityName, SecurityLevel}.\n"
"%% For example\n"
"%% {\"target_v3\", v3, usm, \"\", noAuthNoPriv}.\n"
"%%\n\n",
    Hdr = header() ++ Comment,
    Conf = [fun(V) ->
		    MP = if V == v1 -> v1;
			    V == v2 -> v2c;
			    V == v3 -> v3
			 end,
		    SM = if V == v1 -> v1;
			    V == v2 -> v2c;
			    V == v3 -> usm
			 end,
		    Name = lists:flatten(
			     io_lib:format("target_~w", [V])),
		    {Name, MP, SM, "initial", noAuthNoPriv}
	    end(Vsn) || Vsn <- Vsns],
    write_agent_target_params_config(Dir, Hdr, Conf).

write_agent_target_params_config(Dir, Hdr, Conf) ->
    snmpa_conf:write_target_params_config(Dir, Hdr, Conf).

update_agent_target_params_config(Dir, Conf) ->
    snmpa_conf:append_target_params_config(Dir, Conf).


%% 
%% ------ notify.conf ------
%% 

write_agent_snmp_notify_conf(Dir, NotifyType) -> 
    Comment = 
"%% This file defines the notification parameters.\n"
"%% The data is inserted into the snmpNotifyTable defined\n"
"%% in SNMP-NOTIFICATION-MIB.\n"
"%% The Name is used as CommunityString for v1 and v2c.\n"
"%% Each row is a 3-tuple:\n"
"%% {Name, Tag, Type}.\n"
"%% For example\n"
"%% {\"standard trap\", \"std_trap\", trap}.\n"
"%% {\"standard inform\", \"std_inform\", inform}.\n"
"%%\n\n",
    Hdr = header() ++ Comment, 
    Conf = [{"standard trap", "std_trap", NotifyType}],
    write_agent_notify_config(Dir, Hdr, Conf).

write_agent_notify_config(Dir, Hdr, Conf) ->
    snmpa_conf:write_notify_config(Dir, Hdr, Conf).

update_agent_notify_config(Dir, Conf) ->
    snmpa_conf:append_notify_config(Dir, Conf).


%% 
%% ------ usm.conf ------
%% 

write_agent_snmp_usm_conf(Dir, Vsns, EngineID, SecType, Passwd) -> 
    case lists:member(v3, Vsns) of
	false -> ok;
	true -> write_agent_snmp_usm_conf(Dir, EngineID, SecType, Passwd)
    end.

write_agent_snmp_usm_conf(Dir, EngineID, SecType, Passwd) -> 
    Comment = 
"%% This file defines the security parameters for the user-based\n"
"%% security model.\n"
"%% The data is inserted into the usmUserTable defined\n"
"%% in SNMP-USER-BASED-SM-MIB.\n"
"%% Each row is a 14-tuple:\n"
"%% {EngineID, UserName, SecName, Clone, AuthP, AuthKeyC, OwnAuthKeyC,\n"
"%%  PrivP, PrivKeyC, OwnPrivKeyC, Public, AuthKey, PrivKey}.\n"
"%% For example\n"
"%% {\"agentEngine\", \"initial\", \"initial\", zeroDotZero,\n"
"%%  usmNoAuthProtocol, \"\", \"\", usmNoPrivProtocol, \"\", \"\", \"\",\n"
"%%  \"\", \"\"}.\n"
"%%\n\n",
    Hdr = header() ++ Comment,
    Conf = write_agent_snmp_usm_conf2(EngineID, SecType, Passwd),
    write_agent_usm_config(Dir, Hdr, Conf).

write_agent_snmp_usm_conf2(EngineID, none, _Passwd) ->
    [{EngineID, "initial", "initial", zeroDotZero, 
      usmNoAuthProtocol, "", "", 
      usmNoPrivProtocol, "", "", 
      "", "", ""}];
write_agent_snmp_usm_conf2(EngineID, SecType, Passwd) ->
    Secret16 = agent_snmp_mk_secret(md5, Passwd, EngineID),
    Secret20 = agent_snmp_mk_secret(sha, Passwd, EngineID),
    {PrivProt, PrivSecret} = 
	case SecType of
	    minimum ->
		{usmNoPrivProtocol,    ""};
	    {semi, des} ->
		{usmDESPrivProtocol,   Secret16};
	    {semi, aes} ->
		{usmAesCfb128Protocol, Secret16}
	end,
    [{EngineID, "initial", "initial", zeroDotZero, 
      usmHMACMD5AuthProtocol, "", "", 
      PrivProt, "", "", 
      "", Secret16, PrivSecret},
     
     {EngineID, "templateMD5", "templateMD5", zeroDotZero, 
      usmHMACMD5AuthProtocol, "", "", 
      PrivProt, "", "", 
      "", Secret16, PrivSecret}, 

     {EngineID, "templateSHA", "templateSHA", zeroDotZero, 
      usmHMACSHAAuthProtocol, "", "", 
      PrivProt, "", "", 
      "", Secret20, PrivSecret}].

write_agent_usm_config(Dir, Hdr, Conf) ->
    snmpa_conf:write_usm_config(Dir, Hdr, Conf).

update_agent_usm_config(Dir, Conf) ->
    snmpa_conf:append_usm_config(Dir, Conf).


%% 
%% ------ vacm.conf ------
%% 

write_agent_snmp_vacm_conf(Dir, Vsns, SecType) ->
    Comment = 
"%% This file defines the Mib Views.\n"
"%% The data is inserted into the vacm* tables defined\n"
"%% in SNMP-VIEW-BASED-ACM-MIB.\n"
"%% Each row is one of 3 tuples; one for each table in the MIB:\n"
"%% {vacmSecurityToGroup, SecModel, SecName, GroupName}.\n"
"%% {vacmAccess, GroupName, Prefix, SecModel, SecLevel, Match, RV, WV, NV}.\n"
"%% {vacmViewTreeFamily, ViewIndex, ViewSubtree, ViewStatus, ViewMask}.\n"
"%% For example\n"
"%% {vacmSecurityToGroup, v2c, \"initial\", \"initial\"}.\n"
"%% {vacmSecurityToGroup, usm, \"initial\", \"initial\"}.\n"
"%%  read/notify access to system\n"
"%% {vacmAccess, \"initial\", \"\", any, noAuthNoPriv, exact,\n"
"%%              \"system\", \"\", \"system\"}.\n"
"%% {vacmViewTreeFamily, \"system\", [1,3,6,1,2,1,1], included, null}.\n"
"%% {vacmViewTreeFamily, \"exmib\", [1,3,6,1,3], included, null}."
" % for EX1-MIB\n"
"%% {vacmViewTreeFamily, \"internet\", [1,3,6,1], included, null}.\n"
"%%\n\n",
    Hdr = lists:flatten(header()) ++ Comment,
    Groups = 
	lists:foldl(
	  fun(V, Acc) ->
		  [{vacmSecurityToGroup, vacm_ver(V), 
		    "initial",    "initial"},
		   {vacmSecurityToGroup, vacm_ver(V), 
		    "all-rights", "all-rights"}|
		   Acc]
	  end, [], Vsns),
    Acc = 
	[{vacmAccess, "initial", "", any, noAuthNoPriv, exact, 
	  "restricted", "", "restricted"}, 
	 {vacmAccess, "initial", "", usm, authNoPriv, exact, 
	  "internet", "internet", "internet"}, 
	 {vacmAccess, "initial", "", usm, authPriv, exact, 
	  "internet", "internet", "internet"}, 
	 {vacmAccess, "all-rights", "", any, noAuthNoPriv, exact, 
	  "internet", "internet", "internet"}],
    VTF0 = 
	case SecType of
	    none ->
		[{vacmViewTreeFamily, 
		  "restricted", [1,3,6,1], included, null}];
	    minimum ->
		[{vacmViewTreeFamily, 
		  "restricted", [1,3,6,1], included, null}];
	    {semi, _} ->
		[{vacmViewTreeFamily, 
		  "restricted", [1,3,6,1,2,1,1], included, null},
		 {vacmViewTreeFamily, 
		  "restricted", [1,3,6,1,2,1,11], included, null},
		 {vacmViewTreeFamily, 
		  "restricted", [1,3,6,1,6,3,10,2,1], included, null},
		 {vacmViewTreeFamily, 
		  "restricted", [1,3,6,1,6,3,11,2,1], included, null},
		 {vacmViewTreeFamily, 
		  "restricted", [1,3,6,1,6,3,15,1,1], included, null}]
	end,
    VTF = VTF0 ++ [{vacmViewTreeFamily,"internet",[1,3,6,1],included,null}],
    write_agent_vacm_config(Dir, Hdr, Groups ++ Acc ++ VTF).

vacm_ver(v1) -> v1;
vacm_ver(v2) -> v2c;
vacm_ver(v3) -> usm.
     
write_agent_vacm_config(Dir, Hdr, Conf) ->
    snmpa_conf:write_vacm_config(Dir, Hdr, Conf).

update_agent_vacm_config(Dir, Conf) ->
    snmpa_conf:append_vacm_config(Dir, Conf).


%% 
%% ----- Manager config files generator functions -----
%% 

write_manager_snmp_files(Dir, IP, Port, MMS, EngineID, 
			 Users, Agents, Usms) ->
    write_manager_snmp_conf(Dir, IP, Port, MMS, EngineID),
    write_manager_snmp_users_conf(Dir, Users),
    write_manager_snmp_agents_conf(Dir, Agents),
    write_manager_snmp_usm_conf(Dir, Usms),  
    ok.


%% 
%% ------ manager.conf ------
%% 

write_manager_snmp_conf(Dir, IP, Port, MMS, EngineID) -> 
    Comment = 
"%% This file defines the Manager local configuration info\n"
"%% Each row is a 2-tuple:\n"
"%% {Variable, Value}.\n"
"%% For example\n"
"%% {port,             5000}.\n"
"%% {address,          [127,42,17,5]}.\n"
"%% {engine_id,        \"managerEngine\"}.\n"
"%% {max_message_size, 484}.\n"
"%%\n\n",
    Hdr = header() ++ Comment,
    Conf = [{port,             Port}, 
            {address,          IP}, 
	    {engine_id,        EngineID}, 
	    {max_message_size, MMS}], 
    write_manager_config(Dir, Hdr, Conf).

write_manager_config(Dir, Hdr, Conf) ->
    snmpm_conf:write_manager_config(Dir, Hdr, Conf).
    
update_manager_config(Dir, Conf) ->
    snmpm_conf:append_manager_config(Dir, Conf).
    

%% 
%% ------ users.conf ------
%% 

write_manager_snmp_users_conf(Dir, Users) ->
    Comment = 
"%% This file defines the users the manager handles\n"
"%% Each row is a 3-tuple:\n"
"%% {UserId, UserMod, UserData}.\n"
"%% For example\n"
"%% {kalle, kalle_callback_user_mod, \"dummy\"}.\n"
"%%\n\n",
    Hdr = header() ++ Comment,
    write_manager_users_config(Dir, Hdr, Users).

write_manager_users_config(Dir, Hdr, Users) ->
    snmpm_conf:write_users_config(Dir, Hdr, Users).

update_manager_users_config(Dir, Users) ->
    snmpm_conf:append_users_config(Dir, Users).


%% 
%% ------ agents.conf ------
%% 

write_manager_snmp_agents_conf(Dir, Agents) ->
    Comment = 
"%% This file defines the agents the manager handles\n"
"%% Each row is a 12-tuple:\n"
"%% {UserId, \n"
"%%  TargetName, Comm, Ip, Port, EngineID, Timeout, \n"
"%%  MaxMessageSize, Version, SecModel, SecName, SecLevel}\n"
"%%\n\n",
    Hdr = header() ++ Comment, 
    write_manager_agents_config(Dir, Hdr, Agents).

write_manager_agents_config(Dir, Hdr, Agents) ->
    snmpm_conf:write_agents_config(Dir, Hdr, Agents).

update_manager_agents_config(Dir, Agents) ->
    snmpm_conf:append_agents_config(Dir, Agents).


%% 
%% ------ usm.conf -----
%% 

write_manager_snmp_usm_conf(Dir, Usms) ->
    Comment = 
"%% This file defines the usm users the manager handles\n"
"%% Each row is a 6 or 7-tuple:\n"
"%% {EngineID, UserName, AuthP, AuthKey, PrivP, PrivKey}\n"
"%% {EngineID, UserName, SecName, AuthP, AuthKey, PrivP, PrivKey}\n"
"%%\n\n",
    Hdr = header() ++ Comment,
    write_manager_usm_config(Dir, Hdr, Usms).

write_manager_usm_config(Dir, Hdr, Usms) ->
    snmpm_conf:write_usm_config(Dir, Hdr, Usms).

update_manager_usm_config(Dir, Usms) ->
    snmpm_conf:append_usm_config(Dir, Usms).


%% 
%% -------------------------------------------------------------------------
%% 

write_sys_config_file(Dir, Services) ->
    {ok, Fid} = file:open(filename:join(Dir,"sys.config"), [write]),
    ok = io:format(Fid, "~s", [header()]),
    ok = io:format(Fid, "[{snmp, ~n", []),
    ok = io:format(Fid, "  [~n", []),
    write_sys_config_file_services(Fid, Services),
    ok = io:format(Fid, "  ]~n", []),
    ok = io:format(Fid, " }~n", []),
    ok = io:format(Fid, "].~n", []),
    ok.

write_sys_config_file_services(Fid, [Service]) ->
    write_sys_config_file_service(Fid, Service),
    ok = io:format(Fid, "~n", []),
    ok;
write_sys_config_file_services(Fid, [Service|Services]) ->
    write_sys_config_file_service(Fid, Service),
    ok = io:format(Fid, ", ~n", []),
    write_sys_config_file_services(Fid, Services).

write_sys_config_file_service(Fid, {Service, Opts}) ->
    ok = io:format(Fid, "   {~w,~n", [Service]),
    ok = io:format(Fid, "    [~n", []),
    write_sys_config_file_service_opts(Fid, Service, Opts),
    ok = io:format(Fid, "    ]~n", []),
    ok = io:format(Fid, "   }", []),
    true.

write_sys_config_file_service_opts(Fid, agent, Opts) ->
    write_sys_config_file_agent_opts(Fid, Opts);
write_sys_config_file_service_opts(Fid, manager, Opts) ->
    write_sys_config_file_manager_opts(Fid, Opts).


write_sys_config_file_agent_opts(Fid, [Opt]) ->
    write_sys_config_file_agent_opt(Fid, Opt),
    ok = io:format(Fid, "~n", []),
    ok;
write_sys_config_file_agent_opts(Fid, [Opt|Opts]) ->
    write_sys_config_file_agent_opt(Fid, Opt),
    ok = io:format(Fid, ", ~n", []),
    write_sys_config_file_agent_opts(Fid, Opts).


write_sys_config_file_agent_opt(Fid, {mibs, []}) ->
    ok = io:format(Fid, "     {mibs, []}", []);
write_sys_config_file_agent_opt(Fid, {priority, Prio}) ->
    ok = io:format(Fid, "     {priority, ~w}", [Prio]);
write_sys_config_file_agent_opt(Fid, {error_report_mod, Mod}) ->
    ok = io:format(Fid, "     {error_report_mod, ~w}", [Mod]);
write_sys_config_file_agent_opt(Fid, {versions, Vsns}) ->
    ok = io:format(Fid, "     {versions, ~w}", [Vsns]);
write_sys_config_file_agent_opt(Fid, {multi_threaded, B}) ->
    ok = io:format(Fid, "     {multi_threaded, ~w}", [B]);
write_sys_config_file_agent_opt(Fid, {config, Opts}) ->
    ok = io:format(Fid, "     {config, [", []),
    write_sys_config_file_agent_config_opts(Fid, Opts),
    ok = io:format(Fid, "}", []);
write_sys_config_file_agent_opt(Fid, {db_dir, Dir}) ->
    ok = io:format(Fid, "     {db_dir, \"~s\"}", [Dir]);
write_sys_config_file_agent_opt(Fid, {mib_storage, ets}) ->
    ok = io:format(Fid, "     {mib_storage, ets}", []);
write_sys_config_file_agent_opt(Fid, {mib_storage, {dets, Dir}}) ->
    ok = io:format(Fid, "     {mib_storage, {dets, \"~s\"}}", [Dir]);
write_sys_config_file_agent_opt(Fid, {mib_storage, {dets, Dir, Act}}) ->
    ok = io:format(Fid, "     {mib_storage, {dets, \"~s\", ~w}}", 
		   [Dir, Act]);
write_sys_config_file_agent_opt(Fid, {mib_storage, {mnesia, Nodes}}) ->
    ok = io:format(Fid, "     {mib_storage, {mnesia, ~w}}", [Nodes]);
write_sys_config_file_agent_opt(Fid, {mib_storage, {mnesia, Nodes, Act}}) ->
    ok = io:format(Fid, "     {mib_storage, {mnesia, ~w, ~w}}", 
		   [Nodes, Act]);
write_sys_config_file_agent_opt(Fid, {target_cache, Opts}) ->
    ok = io:format(Fid, "     {target_cache, ~w}", [Opts]);
write_sys_config_file_agent_opt(Fid, {local_db, Opts}) ->
    ok = io:format(Fid, "     {local_db, ~w}", [Opts]);
write_sys_config_file_agent_opt(Fid, {note_store, Opts}) ->
    ok = io:format(Fid, "     {note_store, ~w}", [Opts]);
write_sys_config_file_agent_opt(Fid, {symbolic_store, Opts}) ->
    ok = io:format(Fid, "     {symbolic_store, ~w}", [Opts]);
write_sys_config_file_agent_opt(Fid, {agent_type, Type}) ->
    ok = io:format(Fid, "     {agent_type, ~w}", [Type]);
write_sys_config_file_agent_opt(Fid, {agent_verbosity, Verb}) ->
    ok = io:format(Fid, "     {agent_verbosity, ~w}", [Verb]);
write_sys_config_file_agent_opt(Fid, {audit_trail_log, Opts}) ->
    ok = io:format(Fid, "     {audit_trail_log, [", []),
    write_sys_config_file_agent_atl_opts(Fid, Opts),
    ok = io:format(Fid, "}", []);
write_sys_config_file_agent_opt(Fid, {discovery, Opts}) ->
    ok = io:format(Fid, "     {discovery, [", []),
    write_sys_config_file_agent_disco_opts(Fid, Opts),
    ok = io:format(Fid, "}", []);
write_sys_config_file_agent_opt(Fid, {net_if, Opts}) ->
    ok = io:format(Fid, "     {net_if, ~w}", [Opts]);
write_sys_config_file_agent_opt(Fid, {mib_server, Opts}) ->
    ok = io:format(Fid, "     {mib_server, ~w}", [Opts]);
write_sys_config_file_agent_opt(Fid, {Key, Val}) ->
    ok = io:format(Fid, "     {~w, ~w}", [Key, Val]).
    

%% Mandatory option dir, means that this is never empty:
write_sys_config_file_agent_config_opts(Fid, [Opt]) ->
    write_sys_config_file_agent_config_opt(Fid, Opt),
    ok = io:format(Fid, "]", []),
    ok;
write_sys_config_file_agent_config_opts(Fid, [Opt|Opts]) ->
    write_sys_config_file_agent_config_opt(Fid, Opt),
    ok = io:format(Fid, ", ", []),
    write_sys_config_file_agent_config_opts(Fid, Opts).
    
write_sys_config_file_agent_config_opt(Fid, {dir, Dir}) ->
    ok = io:format(Fid, "{dir, \"~s\"}", [Dir]);
write_sys_config_file_agent_config_opt(Fid, {force_load, Bool}) ->
    ok = io:format(Fid, "{force_load, ~w}", [Bool]);
write_sys_config_file_agent_config_opt(Fid, {verbosity, Verb}) ->
    ok = io:format(Fid, "{verbosity, ~w}", [Verb]).


%% This is only present if there is atleast one option
write_sys_config_file_agent_atl_opts(Fid, [Opt]) ->
    write_sys_config_file_agent_atl_opt(Fid, Opt),
    ok = io:format(Fid, "]", []),
    ok;
write_sys_config_file_agent_atl_opts(Fid, [Opt|Opts]) ->
    write_sys_config_file_agent_atl_opt(Fid, Opt),
    ok = io:format(Fid, ", ", []),
    write_sys_config_file_agent_atl_opts(Fid, Opts).
    
write_sys_config_file_agent_atl_opt(Fid, {dir, Dir}) ->
    ok = io:format(Fid, "{dir, \"~s\"}", [Dir]);
write_sys_config_file_agent_atl_opt(Fid, {type, Type}) ->
    ok = io:format(Fid, "{type, ~w}", [Type]);
write_sys_config_file_agent_atl_opt(Fid, {size, Size}) ->
    ok = io:format(Fid, "{size, ~w}", [Size]);
write_sys_config_file_agent_atl_opt(Fid, {repair, Rep}) ->
    ok = io:format(Fid, "{repair, ~w}", [Rep]);
write_sys_config_file_agent_atl_opt(Fid, {seqno, SeqNo}) ->
    ok = io:format(Fid, "{seqno, ~w}", [SeqNo]).


%% These options are allways there
write_sys_config_file_agent_disco_opts(Fid, [Opt]) ->
    write_sys_config_file_agent_disco_opt(Fid, Opt),
    ok = io:format(Fid, "]", []),
    ok;
write_sys_config_file_agent_disco_opts(Fid, [Opt|Opts]) ->
    write_sys_config_file_agent_disco_opt(Fid, Opt),
    ok = io:format(Fid, ", ", []),
    write_sys_config_file_agent_disco_opts(Fid, Opts).
    
write_sys_config_file_agent_disco_opt(Fid, {terminating, Opts}) ->
    ok = io:format(Fid, "{terminating, [", []),
    write_sys_config_file_agent_term_disco_opts(Fid, Opts),
    ok = io:format(Fid, "}", []);
write_sys_config_file_agent_disco_opt(Fid, {originating, Opts}) ->
    ok = io:format(Fid, "{originating, [", []),
    write_sys_config_file_agent_orig_disco_opts(Fid, Opts),
    ok = io:format(Fid, "}", []).

write_sys_config_file_agent_term_disco_opts(Fid, [Opt]) ->
    write_sys_config_file_agent_term_disco_opt(Fid, Opt),
    ok = io:format(Fid, "]", []),
    ok;
write_sys_config_file_agent_term_disco_opts(Fid, [Opt|Opts]) ->
    write_sys_config_file_agent_term_disco_opt(Fid, Opt),
    ok = io:format(Fid, ", ", []),
    write_sys_config_file_agent_term_disco_opts(Fid, Opts).
    
write_sys_config_file_agent_term_disco_opt(Fid, {enable, Enable}) ->
    ok = io:format(Fid, "{enable, ~w}", [Enable]);
write_sys_config_file_agent_term_disco_opt(Fid, {stage2, Stage2}) ->
    ok = io:format(Fid, "{stage2, ~w}", [Stage2]);
write_sys_config_file_agent_term_disco_opt(Fid, {trigger_username, Trigger}) ->
    ok = io:format(Fid, "{trigger_username, \"~s\"}", [Trigger]).

write_sys_config_file_agent_orig_disco_opts(Fid, [Opt]) ->
    write_sys_config_file_agent_orig_disco_opt(Fid, Opt),
    ok = io:format(Fid, "]", []),
    ok;
write_sys_config_file_agent_orig_disco_opts(Fid, [Opt|Opts]) ->
    write_sys_config_file_agent_orig_disco_opt(Fid, Opt),
    ok = io:format(Fid, ", ", []),
    write_sys_config_file_agent_orig_disco_opts(Fid, Opts).
    
write_sys_config_file_agent_orig_disco_opt(Fid, {enable, Enable}) ->
    ok = io:format(Fid, "{enable, ~w}", [Enable]).



write_sys_config_file_manager_opts(Fid, [Opt]) ->
    write_sys_config_file_manager_opt(Fid, Opt),
    ok = io:format(Fid, "~n", []),
    ok;
write_sys_config_file_manager_opts(Fid, [Opt|Opts]) ->
    write_sys_config_file_manager_opt(Fid, Opt),
    ok = io:format(Fid, ", ~n", []),
    write_sys_config_file_manager_opts(Fid, Opts).


write_sys_config_file_manager_opt(Fid, {mibs, []}) ->
    ok = io:format(Fid, "     {mibs, []}", []);
write_sys_config_file_manager_opt(Fid, {priority, Prio}) ->
    ok = io:format(Fid, "     {priority, ~w}", [Prio]);
write_sys_config_file_manager_opt(Fid, {versions, Vsns}) ->
    ok = io:format(Fid, "     {versions, ~w}", [Vsns]);
write_sys_config_file_manager_opt(Fid, {config, Opts}) ->
    ok = io:format(Fid, "     {config, [", []),
    write_sys_config_file_manager_config_opts(Fid, Opts),
    ok = io:format(Fid, "}", []);
write_sys_config_file_manager_opt(Fid, {server, Opts}) ->
    ok = io:format(Fid, "     {server, ~w}", [Opts]);
write_sys_config_file_manager_opt(Fid, {note_store, Opts}) ->
    ok = io:format(Fid, "     {note_store, ~w}", [Opts]);
write_sys_config_file_manager_opt(Fid, {audit_trail_log, Opts}) ->
    ok = io:format(Fid, "     {audit_trail_log, [", []),
    write_sys_config_file_manager_atl_opts(Fid, Opts),
    ok = io:format(Fid, "}", []);
write_sys_config_file_manager_opt(Fid, {net_if, Opts}) ->
    ok = io:format(Fid, "     {net_if, ~w}", [Opts]);
write_sys_config_file_manager_opt(Fid, {Key, Val}) ->
    ok = io:format(Fid, "     {~w, ~w}", [Key, Val]).
    
%% Mandatory option dir, means that this is never empty:
write_sys_config_file_manager_config_opts(Fid, [Opt]) ->
    write_sys_config_file_manager_config_opt(Fid, Opt),
    ok = io:format(Fid, "]", []),
    ok;
write_sys_config_file_manager_config_opts(Fid, [Opt|Opts]) ->
    write_sys_config_file_manager_config_opt(Fid, Opt),
    ok = io:format(Fid, ", ", []),
    write_sys_config_file_manager_config_opts(Fid, Opts).
    
write_sys_config_file_manager_config_opt(Fid, {dir, Dir}) ->
    ok = io:format(Fid, "{dir, \"~s\"}", [Dir]);
write_sys_config_file_manager_config_opt(Fid, {db_dir, Dir}) ->
    ok = io:format(Fid, "{db_dir, \"~s\"}", [Dir]);
write_sys_config_file_manager_config_opt(Fid, {repair, Rep}) ->
    ok = io:format(Fid, "{repair, ~w}", [Rep]);
write_sys_config_file_manager_config_opt(Fid, {auto_save, As}) ->
    ok = io:format(Fid, "{auto_save, ~w}", [As]);
write_sys_config_file_manager_config_opt(Fid, {verbosity, Verb}) ->
    ok = io:format(Fid, "{verbosity, ~w}", [Verb]).


%% This is only present if there is atleast one option
write_sys_config_file_manager_atl_opts(Fid, [Opt]) ->
    write_sys_config_file_manager_atl_opt(Fid, Opt),
    ok = io:format(Fid, "]", []),
    ok;
write_sys_config_file_manager_atl_opts(Fid, [Opt|Opts]) ->
    write_sys_config_file_manager_atl_opt(Fid, Opt),
    ok = io:format(Fid, ", ", []),
    write_sys_config_file_manager_atl_opts(Fid, Opts).
    
write_sys_config_file_manager_atl_opt(Fid, {dir, Dir}) ->
    ok = io:format(Fid, "{dir, \"~s\"}", [Dir]);
write_sys_config_file_manager_atl_opt(Fid, {type, Type}) ->
    ok = io:format(Fid, "{type, ~w}", [Type]);
write_sys_config_file_manager_atl_opt(Fid, {size, Size}) ->
    ok = io:format(Fid, "{size, ~w}", [Size]);
write_sys_config_file_manager_atl_opt(Fid, {repair, Rep}) ->
    ok = io:format(Fid, "{repair, ~w}", [Rep]).


header() ->
    {Y,Mo,D} = date(),
    {H,Mi,S} = time(),
    io_lib:format("%% This file was generated by "
		  "snmp_config (version-~s) ~w-~2.2.0w-~2.2.0w "
		  "~2.2.0w:~2.2.0w:~2.2.0w\n",
		  [?version,Y,Mo,D,H,Mi,S]).


write_config_file(Dir, FileName, Verify, Write) 
  when (is_list(Dir) andalso 
	is_list(FileName) andalso 
	is_function(Verify) andalso 
	is_function(Write)) ->
    (catch do_write_config_file(Dir, FileName, Verify, Write)).

do_write_config_file(Dir, FileName, Verify, Write) ->
    Verify(),
    case file:open(filename:join(Dir, FileName), [write]) of
	{ok, Fd} ->
	    (catch Write(Fd)),
	    file:close(Fd),
	    ok;
	Error ->
	    Error
    end.


append_config_file(Dir, FileName, Verify, Write) 
  when (is_list(Dir) andalso 
	is_list(FileName) andalso 
	is_function(Verify) andalso 
	is_function(Write)) ->
    (catch do_append_config_file(Dir, FileName, Verify, Write)).

do_append_config_file(Dir, FileName, Verify, Write) ->
    Verify(),
    case file:open(filename:join(Dir, FileName), [read, write]) of
	{ok, Fd} ->
	    file:position(Fd, eof),
	    (catch Write(Fd)),
	    file:close(Fd),
	    ok;
	Error ->
	    Error
    end.


read_config_file(Dir, FileName, Verify) 
  when is_list(Dir) andalso is_list(FileName) andalso is_function(Verify) ->
    (catch do_read_config_file(Dir, FileName, Verify)).

do_read_config_file(Dir, FileName, Verify) ->
    case file:open(filename:join(Dir, FileName), [read]) of
	{ok, Fd} ->
	    Result = read_loop(Fd, [], Verify, 1),
	    file:close(Fd),
	    Result;
	{error, Reason} ->
	    {error, {Reason, FileName}}
    end.

read_loop(Fd, Acc, Check, StartLine) ->
    case read_term(Fd, StartLine) of
	{ok, Term, EndLine} ->
	    case (catch Check(Term)) of
		ok ->
		    read_loop(Fd, [Term | Acc], Check, EndLine);
		{error, Reason} ->
		    {error, {failed_check, StartLine, EndLine, Reason}};
		Error ->
		    {error, {failed_check, StartLine, EndLine, Error}}
	    end;
	{error, EndLine, Error} ->
            {error, {failed_reading, StartLine, EndLine, Error}};
        eof ->
            {ok, lists:reverse(Acc)}
    end.
	    
read_term(Fd, StartLine) ->
    case io:request(Fd, {get_until, "", erl_scan, tokens, [StartLine]}) of
	{ok, Tokens, EndLine} ->
	    case erl_parse:parse_term(Tokens) of
                {ok, Term} ->
                    {ok, Term, EndLine};
                {error, {Line, erl_parse, Error}} ->
                    {error, Line, {parse_error, Error}}
            end;
        {error, E, EndLine} ->
            {error, EndLine, E};
        {eof, _EndLine} ->
            eof;
        Other ->
            Other
    end.


agent_snmp_mk_secret(Alg, Passwd, EngineID) ->
    snmp_usm:passwd2localized_key(Alg, Passwd, EngineID).


ensure_crypto_started() ->
    i("making sure crypto server is started..."),
    ensure_started(crypto).

ensure_started(App) ->
    case (catch App:start()) of
	ok ->
	    ok;
	{error, {already_started, App}} ->
	    ok;
	E ->
	    error({failed_starting, App, E})
    end.


%% -------------------------------------------------------------------------

% d(F, A) ->
%     i("DBG: " ++ F, A).

i(F) ->
    i(F, []).

i(F, A) ->
    io:format(F ++ "~n", A).

error(R) ->
    throw({error, R}).