#ifndef ONIGURUMA_H #define ONIGURUMA_H /********************************************************************** oniguruma.h - Oniguruma (regular expression library) **********************************************************************/ /*- * Copyright (c) 2002-2005 K.Kosako * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifdef __cplusplus extern "C" { #endif #define ONIGURUMA #define ONIGURUMA_VERSION_MAJOR 3 #define ONIGURUMA_VERSION_MINOR 7 #define ONIGURUMA_VERSION_TEENY 0 #ifdef __cplusplus # ifndef HAVE_PROTOTYPES # define HAVE_PROTOTYPES 1 # endif # ifndef HAVE_STDARG_PROTOTYPES # define HAVE_STDARG_PROTOTYPES 1 # endif #endif #ifndef P_ #if defined(__STDC__) || defined(_WIN32) # define P_(args) args #else # define P_(args) () #endif #endif #ifndef PV_ #ifdef HAVE_STDARG_PROTOTYPES # define PV_(args) args #else # define PV_(args) () #endif #endif #ifndef ONIG_EXTERN #if defined(_WIN32) && !defined(__GNUC__) #if defined(EXPORT) || defined(RUBY_EXPORT) #define ONIG_EXTERN extern __declspec(dllexport) #else #define ONIG_EXTERN extern __declspec(dllimport) #endif #endif #endif #ifndef ONIG_EXTERN #define ONIG_EXTERN extern #endif /* PART: character encoding */ typedef unsigned char UChar; typedef unsigned long OnigCodePoint; typedef unsigned int OnigDistance; #define ONIG_INFINITE_DISTANCE ~((OnigDistance )0) /* ambiguous match flag */ typedef unsigned int OnigAmbigType; ONIG_EXTERN OnigAmbigType OnigDefaultAmbigFlag; #define ONIGENC_AMBIGUOUS_MATCH_NONE 0 #define ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE (1<<0) #define ONIGENC_AMBIGUOUS_MATCH_NONASCII_CASE (1<<1) /* #define ONIGENC_AMBIGUOUS_MATCH_ACCENT (1<<2) */ /* #define ONIGENC_AMBIGUOUS_MATCH_HIRAGANA_KATAKANA (1<<3) */ /* #define ONIGENC_AMBIGUOUS_MATCH_KATAKANA_WIDTH (1<<4) */ #define ONIGENC_AMBIGUOUS_MATCH_LIMIT (1<<1) #define ONIGENC_AMBIGUOUS_MATCH_COMPOUND (1<<30) #define ONIGENC_AMBIGUOUS_MATCH_FULL \ ( ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE | \ ONIGENC_AMBIGUOUS_MATCH_NONASCII_CASE | \ ONIGENC_AMBIGUOUS_MATCH_COMPOUND ) #define ONIGENC_AMBIGUOUS_MATCH_DEFAULT OnigDefaultAmbigFlag #define ONIGENC_MAX_COMP_AMBIG_CODE_LEN 3 #define ONIGENC_MAX_COMP_AMBIG_CODE_ITEM_NUM 4 /* code range */ #define ONIGENC_CODE_RANGE_NUM(range) ((int )range[0]) #define ONIGENC_CODE_RANGE_FROM(range,i) range[((i)*2) + 1] #define ONIGENC_CODE_RANGE_TO(range,i) range[((i)*2) + 2] typedef struct { int len; OnigCodePoint code[ONIGENC_MAX_COMP_AMBIG_CODE_LEN]; } OnigCompAmbigCodeItem; typedef struct { int n; OnigCodePoint code; OnigCompAmbigCodeItem items[ONIGENC_MAX_COMP_AMBIG_CODE_ITEM_NUM]; } OnigCompAmbigCodes; typedef struct { OnigCodePoint from; OnigCodePoint to; } OnigPairAmbigCodes; typedef struct { OnigCodePoint esc; OnigCodePoint anychar; OnigCodePoint anytime; OnigCodePoint zero_or_one_time; OnigCodePoint one_or_more_time; OnigCodePoint anychar_anytime; } OnigMetaCharTableType; #if defined(RUBY_PLATFORM) && defined(M17N_H) #define ONIG_RUBY_M17N typedef m17n_encoding* OnigEncoding; #else typedef struct { int (*mbc_enc_len)(const UChar* p); const char* name; int max_enc_len; int min_enc_len; OnigAmbigType support_ambig_flag; OnigMetaCharTableType meta_char_table; int (*is_mbc_newline)(const UChar* p, const UChar* end); OnigCodePoint (*mbc_to_code)(const UChar* p, const UChar* end); int (*code_to_mbclen)(OnigCodePoint code); int (*code_to_mbc)(OnigCodePoint code, UChar *buf); int (*mbc_to_normalize)(OnigAmbigType flag, const UChar** pp, const UChar* end, UChar* to); int (*is_mbc_ambiguous)(OnigAmbigType flag, const UChar** pp, const UChar* end); int (*get_all_pair_ambig_codes)(OnigAmbigType flag, OnigPairAmbigCodes** acs); int (*get_all_comp_ambig_codes)(OnigAmbigType flag, OnigCompAmbigCodes** acs); int (*is_code_ctype)(OnigCodePoint code, unsigned int ctype); int (*get_ctype_code_range)(int ctype, OnigCodePoint* sb_range[], OnigCodePoint* mb_range[]); UChar* (*left_adjust_char_head)(const UChar* start, const UChar* p); int (*is_allowed_reverse_match)(const UChar* p, const UChar* end); } OnigEncodingType; typedef OnigEncodingType* OnigEncoding; ONIG_EXTERN OnigEncodingType OnigEncodingASCII; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_1; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_2; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_3; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_4; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_5; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_6; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_7; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_8; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_9; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_10; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_11; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_13; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_14; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_15; ONIG_EXTERN OnigEncodingType OnigEncodingISO_8859_16; ONIG_EXTERN OnigEncodingType OnigEncodingUTF8; ONIG_EXTERN OnigEncodingType OnigEncodingUTF16_BE; ONIG_EXTERN OnigEncodingType OnigEncodingUTF16_LE; ONIG_EXTERN OnigEncodingType OnigEncodingUTF32_BE; ONIG_EXTERN OnigEncodingType OnigEncodingUTF32_LE; ONIG_EXTERN OnigEncodingType OnigEncodingEUC_JP; ONIG_EXTERN OnigEncodingType OnigEncodingEUC_TW; ONIG_EXTERN OnigEncodingType OnigEncodingEUC_KR; ONIG_EXTERN OnigEncodingType OnigEncodingEUC_CN; ONIG_EXTERN OnigEncodingType OnigEncodingSJIS; ONIG_EXTERN OnigEncodingType OnigEncodingKOI8; ONIG_EXTERN OnigEncodingType OnigEncodingKOI8_R; ONIG_EXTERN OnigEncodingType OnigEncodingBIG5; #define ONIG_ENCODING_ASCII (&OnigEncodingASCII) #define ONIG_ENCODING_ISO_8859_1 (&OnigEncodingISO_8859_1) #define ONIG_ENCODING_ISO_8859_2 (&OnigEncodingISO_8859_2) #define ONIG_ENCODING_ISO_8859_3 (&OnigEncodingISO_8859_3) #define ONIG_ENCODING_ISO_8859_4 (&OnigEncodingISO_8859_4) #define ONIG_ENCODING_ISO_8859_5 (&OnigEncodingISO_8859_5) #define ONIG_ENCODING_ISO_8859_6 (&OnigEncodingISO_8859_6) #define ONIG_ENCODING_ISO_8859_7 (&OnigEncodingISO_8859_7) #define ONIG_ENCODING_ISO_8859_8 (&OnigEncodingISO_8859_8) #define ONIG_ENCODING_ISO_8859_9 (&OnigEncodingISO_8859_9) #define ONIG_ENCODING_ISO_8859_10 (&OnigEncodingISO_8859_10) #define ONIG_ENCODING_ISO_8859_11 (&OnigEncodingISO_8859_11) #define ONIG_ENCODING_ISO_8859_13 (&OnigEncodingISO_8859_13) #define ONIG_ENCODING_ISO_8859_14 (&OnigEncodingISO_8859_14) #define ONIG_ENCODING_ISO_8859_15 (&OnigEncodingISO_8859_15) #define ONIG_ENCODING_ISO_8859_16 (&OnigEncodingISO_8859_16) #define ONIG_ENCODING_UTF8 (&OnigEncodingUTF8) #define ONIG_ENCODING_UTF16_BE (&OnigEncodingUTF16_BE) #define ONIG_ENCODING_UTF16_LE (&OnigEncodingUTF16_LE) #define ONIG_ENCODING_UTF32_BE (&OnigEncodingUTF32_BE) #define ONIG_ENCODING_UTF32_LE (&OnigEncodingUTF32_LE) #define ONIG_ENCODING_EUC_JP (&OnigEncodingEUC_JP) #define ONIG_ENCODING_EUC_TW (&OnigEncodingEUC_TW) #define ONIG_ENCODING_EUC_KR (&OnigEncodingEUC_KR) #define ONIG_ENCODING_EUC_CN (&OnigEncodingEUC_CN) #define ONIG_ENCODING_SJIS (&OnigEncodingSJIS) #define ONIG_ENCODING_KOI8 (&OnigEncodingKOI8) #define ONIG_ENCODING_KOI8_R (&OnigEncodingKOI8_R) #define ONIG_ENCODING_BIG5 (&OnigEncodingBIG5) #endif /* else RUBY && M17N */ #define ONIG_ENCODING_UNDEF ((OnigEncoding )0) /* work size */ #define ONIGENC_CODE_TO_MBC_MAXLEN 7 #define ONIGENC_MBC_NORMALIZE_MAXLEN ONIGENC_CODE_TO_MBC_MAXLEN /* character types */ #define ONIGENC_CTYPE_NEWLINE (1<< 0) #define ONIGENC_CTYPE_ALPHA (1<< 1) #define ONIGENC_CTYPE_BLANK (1<< 2) #define ONIGENC_CTYPE_CNTRL (1<< 3) #define ONIGENC_CTYPE_DIGIT (1<< 4) #define ONIGENC_CTYPE_GRAPH (1<< 5) #define ONIGENC_CTYPE_LOWER (1<< 6) #define ONIGENC_CTYPE_PRINT (1<< 7) #define ONIGENC_CTYPE_PUNCT (1<< 8) #define ONIGENC_CTYPE_SPACE (1<< 9) #define ONIGENC_CTYPE_UPPER (1<<10) #define ONIGENC_CTYPE_XDIGIT (1<<11) #define ONIGENC_CTYPE_WORD (1<<12) #define ONIGENC_CTYPE_ASCII (1<<13) #define ONIGENC_CTYPE_ALNUM (ONIGENC_CTYPE_ALPHA | ONIGENC_CTYPE_DIGIT) #define enc_len(enc,p) ONIGENC_MBC_ENC_LEN(enc, p) #define ONIGENC_IS_UNDEF(enc) ((enc) == ONIG_ENCODING_UNDEF) #define ONIGENC_IS_SINGLEBYTE(enc) (ONIGENC_MBC_MAXLEN(enc) == 1) #define ONIGENC_IS_MBC_HEAD(enc,p) (ONIGENC_MBC_ENC_LEN(enc,p) != 1) #define ONIGENC_IS_MBC_ASCII(p) (*(p) < 128) #define ONIGENC_IS_CODE_ASCII(code) ((code) < 128) #define ONIGENC_IS_CODE_SB_WORD(enc,code) \ (ONIGENC_IS_CODE_ASCII(code) && ONIGENC_IS_CODE_WORD(enc,code)) #define ONIGENC_IS_MBC_WORD(enc,s,end) \ ONIGENC_IS_CODE_WORD(enc,ONIGENC_MBC_TO_CODE(enc,s,end)) #ifdef ONIG_RUBY_M17N #include /* for isblank(), isgraph() */ #define ONIGENC_MBC_TO_NORMALIZE(enc,flag,pp,end,buf) \ onigenc_mbc_to_normalize(enc,flag,pp,end,buf) #define ONIGENC_IS_MBC_AMBIGUOUS(enc,flag,pp,end) \ onigenc_is_mbc_ambiguous(enc,flag,pp,end) #define ONIGENC_SUPPORT_AMBIG_FLAG(enc) ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE #define ONIGENC_IS_ALLOWED_REVERSE_MATCH(enc,s,end) \ onigenc_is_allowed_reverse_match(enc, s, end) #define ONIGENC_LEFT_ADJUST_CHAR_HEAD(enc,start,s) \ onigenc_get_left_adjust_char_head(enc, start, s) #define ONIGENC_GET_ALL_PAIR_AMBIG_CODES(enc, ambig_flag, acs) 0 #define ONIGENC_GET_ALL_COMP_AMBIG_CODES(enc, ambig_flag, acs) 0 #define ONIGENC_GET_CTYPE_CODE_RANGE(enc,ctype,sbr,mbr) \ ONIG_NO_SUPPORT_CONFIG #define ONIGENC_MBC_ENC_LEN(enc,p) m17n_mbclen(enc,(int )(*p)) #define ONIGENC_MBC_MAXLEN(enc) m17n_mbmaxlen(enc) #define ONIGENC_MBC_MAXLEN_DIST(enc) \ (ONIGENC_MBC_MAXLEN(enc) > 0 ? ONIGENC_MBC_MAXLEN(enc) \ : ONIG_INFINITE_DISTANCE) #define ONIGENC_MBC_MINLEN(enc) 1 #define ONIGENC_MBC_TO_CODE(enc,p,e) m17n_codepoint((enc),(p),(e)) #define ONIGENC_CODE_TO_MBCLEN(enc,code) m17n_codelen((enc),(code)) #define ONIGENC_CODE_TO_MBC(enc,code,buf) onigenc_code_to_mbc(enc, code, buf) #if 0 /* !! not supported !! */ #define ONIGENC_IS_MBC_NEWLINE(enc,p,end) #define ONIGENC_STEP_BACK(enc,start,s,n) #endif #define ONIGENC_IS_CODE_CTYPE(enc,code,ctype) \ onigenc_is_code_ctype(enc,code,ctype) #ifdef isblank # define ONIGENC_IS_CODE_BLANK(enc,code) isblank((int )code) #else # define ONIGENC_IS_CODE_BLANK(enc,code) ((code) == ' ' || (code) == '\t') #endif #ifdef isgraph # define ONIGENC_IS_CODE_GRAPH(enc,code) isgraph((int )code) #else # define ONIGENC_IS_CODE_GRAPH(enc,code) \ (isprint((int )code) && !isspace((int )code)) #endif #define ONIGENC_IS_CODE_PRINT(enc,code) m17n_isprint(enc,code) #define ONIGENC_IS_CODE_ALNUM(enc,code) m17n_isalnum(enc,code) #define ONIGENC_IS_CODE_ALPHA(enc,code) m17n_isalpha(enc,code) #define ONIGENC_IS_CODE_LOWER(enc,code) m17n_islower(enc,code) #define ONIGENC_IS_CODE_UPPER(enc,code) m17n_isupper(enc,code) #define ONIGENC_IS_CODE_CNTRL(enc,code) m17n_iscntrl(enc,code) #define ONIGENC_IS_CODE_PUNCT(enc,code) m17n_ispunct(enc,code) #define ONIGENC_IS_CODE_SPACE(enc,code) m17n_isspace(enc,code) #define ONIGENC_IS_CODE_DIGIT(enc,code) m17n_isdigit(enc,code) #define ONIGENC_IS_CODE_XDIGIT(enc,code) m17n_isxdigit(enc,code) #define ONIGENC_IS_CODE_WORD(enc,code) m17n_iswchar(enc,code) ONIG_EXTERN int onigenc_is_code_ctype P_((OnigEncoding enc, OnigCodePoint code, int ctype)); ONIG_EXTERN int onigenc_code_to_mbc P_((OnigEncoding enc, OnigCodePoint code, UChar *buf)); ONIG_EXTERN int onigenc_mbc_to_normalize P_((OnigEncoding enc, OnigAmbigType flag, const UChar** pp, const UChar* end, UChar* buf)); ONIG_EXTERN int onigenc_is_mbc_ambiguous P_((OnigEncoding enc, OnigAmbigType flag, const UChar** pp, const UChar* end)); ONIG_EXTERN int onigenc_is_allowed_reverse_match P_((OnigEncoding enc, const UChar* s, const UChar* end)); #else /* ONIG_RUBY_M17N */ #define ONIGENC_NAME(enc) ((enc)->name) #define ONIGENC_MBC_TO_NORMALIZE(enc,flag,pp,end,buf) \ (enc)->mbc_to_normalize(flag,(const UChar** )pp,end,buf) #define ONIGENC_IS_MBC_AMBIGUOUS(enc,flag,pp,end) \ (enc)->is_mbc_ambiguous(flag,(const UChar** )pp,end) #define ONIGENC_SUPPORT_AMBIG_FLAG(enc) ((enc)->support_ambig_flag) #define ONIGENC_IS_ALLOWED_REVERSE_MATCH(enc,s,end) \ (enc)->is_allowed_reverse_match(s,end) #define ONIGENC_LEFT_ADJUST_CHAR_HEAD(enc,start,s) \ (enc)->left_adjust_char_head(start, s) #define ONIGENC_GET_ALL_PAIR_AMBIG_CODES(enc,ambig_flag,acs) \ (enc)->get_all_pair_ambig_codes(ambig_flag,acs) #define ONIGENC_GET_ALL_COMP_AMBIG_CODES(enc,ambig_flag,acs) \ (enc)->get_all_comp_ambig_codes(ambig_flag,acs) #define ONIGENC_STEP_BACK(enc,start,s,n) \ onigenc_step_back((enc),(start),(s),(n)) #define ONIGENC_MBC_ENC_LEN(enc,p) (enc)->mbc_enc_len(p) #define ONIGENC_MBC_MAXLEN(enc) ((enc)->max_enc_len) #define ONIGENC_MBC_MAXLEN_DIST(enc) ONIGENC_MBC_MAXLEN(enc) #define ONIGENC_MBC_MINLEN(enc) ((enc)->min_enc_len) #define ONIGENC_IS_MBC_NEWLINE(enc,p,end) (enc)->is_mbc_newline((p),(end)) #define ONIGENC_MBC_TO_CODE(enc,p,end) (enc)->mbc_to_code((p),(end)) #define ONIGENC_CODE_TO_MBCLEN(enc,code) (enc)->code_to_mbclen(code) #define ONIGENC_CODE_TO_MBC(enc,code,buf) (enc)->code_to_mbc(code,buf) #define ONIGENC_IS_CODE_CTYPE(enc,code,ctype) (enc)->is_code_ctype(code,ctype) #define ONIGENC_IS_CODE_NEWLINE(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_NEWLINE) #define ONIGENC_IS_CODE_GRAPH(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_GRAPH) #define ONIGENC_IS_CODE_PRINT(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_PRINT) #define ONIGENC_IS_CODE_ALNUM(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_ALNUM) #define ONIGENC_IS_CODE_ALPHA(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_ALPHA) #define ONIGENC_IS_CODE_LOWER(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_LOWER) #define ONIGENC_IS_CODE_UPPER(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_UPPER) #define ONIGENC_IS_CODE_CNTRL(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_CNTRL) #define ONIGENC_IS_CODE_PUNCT(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_PUNCT) #define ONIGENC_IS_CODE_SPACE(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_SPACE) #define ONIGENC_IS_CODE_BLANK(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_BLANK) #define ONIGENC_IS_CODE_DIGIT(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_DIGIT) #define ONIGENC_IS_CODE_XDIGIT(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_XDIGIT) #define ONIGENC_IS_CODE_WORD(enc,code) \ ONIGENC_IS_CODE_CTYPE(enc,code,ONIGENC_CTYPE_WORD) #define ONIGENC_GET_CTYPE_CODE_RANGE(enc,ctype,sbr,mbr) \ (enc)->get_ctype_code_range(ctype,sbr,mbr) ONIG_EXTERN UChar* onigenc_step_back P_((OnigEncoding enc, const UChar* start, const UChar* s, int n)); #endif /* is not ONIG_RUBY_M17N */ /* encoding API */ ONIG_EXTERN int onigenc_init P_(()); ONIG_EXTERN int onigenc_set_default_encoding P_((OnigEncoding enc)); ONIG_EXTERN OnigEncoding onigenc_get_default_encoding P_(()); ONIG_EXTERN void onigenc_set_default_caseconv_table P_((const UChar* table)); ONIG_EXTERN UChar* onigenc_get_right_adjust_char_head_with_prev P_((OnigEncoding enc, const UChar* start, const UChar* s, const UChar** prev)); ONIG_EXTERN UChar* onigenc_get_prev_char_head P_((OnigEncoding enc, const UChar* start, const UChar* s)); ONIG_EXTERN UChar* onigenc_get_left_adjust_char_head P_((OnigEncoding enc, const UChar* start, const UChar* s)); ONIG_EXTERN UChar* onigenc_get_right_adjust_char_head P_((OnigEncoding enc, const UChar* start, const UChar* s)); ONIG_EXTERN int onigenc_strlen P_((OnigEncoding enc, const UChar* p, const UChar* end)); ONIG_EXTERN int onigenc_strlen_null P_((OnigEncoding enc, const UChar* p)); ONIG_EXTERN int onigenc_str_bytelen_null P_((OnigEncoding enc, const UChar* p)); /* PART: regular expression */ /* config parameters */ #define ONIG_NREGION 10 #define ONIG_MAX_BACKREF_NUM 1000 #define ONIG_MAX_REPEAT_NUM 100000 #define ONIG_MAX_MULTI_BYTE_RANGES_NUM 1000 /* constants */ #define ONIG_MAX_ERROR_MESSAGE_LEN 90 typedef unsigned int OnigOptionType; #define ONIG_OPTION_DEFAULT ONIG_OPTION_NONE /* options */ #define ONIG_OPTION_NONE 0 #define ONIG_OPTION_IGNORECASE 1L #define ONIG_OPTION_EXTEND (ONIG_OPTION_IGNORECASE << 1) #define ONIG_OPTION_MULTILINE (ONIG_OPTION_EXTEND << 1) #define ONIG_OPTION_SINGLELINE (ONIG_OPTION_MULTILINE << 1) #define ONIG_OPTION_FIND_LONGEST (ONIG_OPTION_SINGLELINE << 1) #define ONIG_OPTION_FIND_NOT_EMPTY (ONIG_OPTION_FIND_LONGEST << 1) #define ONIG_OPTION_NEGATE_SINGLELINE (ONIG_OPTION_FIND_NOT_EMPTY << 1) #define ONIG_OPTION_DONT_CAPTURE_GROUP (ONIG_OPTION_NEGATE_SINGLELINE << 1) #define ONIG_OPTION_CAPTURE_GROUP (ONIG_OPTION_DONT_CAPTURE_GROUP << 1) /* options (search time) */ #define ONIG_OPTION_NOTBOL (ONIG_OPTION_CAPTURE_GROUP << 1) #define ONIG_OPTION_NOTEOL (ONIG_OPTION_NOTBOL << 1) #define ONIG_OPTION_POSIX_REGION (ONIG_OPTION_NOTEOL << 1) #define ONIG_OPTION_ON(options,regopt) ((options) |= (regopt)) #define ONIG_OPTION_OFF(options,regopt) ((options) &= ~(regopt)) #define ONIG_IS_OPTION_ON(options,option) ((options) & (option)) /* syntax */ typedef struct { unsigned int op; unsigned int op2; unsigned int behavior; OnigOptionType options; /* default option */ } OnigSyntaxType; ONIG_EXTERN OnigSyntaxType OnigSyntaxPosixBasic; ONIG_EXTERN OnigSyntaxType OnigSyntaxPosixExtended; ONIG_EXTERN OnigSyntaxType OnigSyntaxEmacs; ONIG_EXTERN OnigSyntaxType OnigSyntaxGrep; ONIG_EXTERN OnigSyntaxType OnigSyntaxGnuRegex; ONIG_EXTERN OnigSyntaxType OnigSyntaxJava; ONIG_EXTERN OnigSyntaxType OnigSyntaxPerl; ONIG_EXTERN OnigSyntaxType OnigSyntaxRuby; /* predefined syntaxes (see regsyntax.c) */ #define ONIG_SYNTAX_POSIX_BASIC (&OnigSyntaxPosixBasic) #define ONIG_SYNTAX_POSIX_EXTENDED (&OnigSyntaxPosixExtended) #define ONIG_SYNTAX_EMACS (&OnigSyntaxEmacs) #define ONIG_SYNTAX_GREP (&OnigSyntaxGrep) #define ONIG_SYNTAX_GNU_REGEX (&OnigSyntaxGnuRegex) #define ONIG_SYNTAX_JAVA (&OnigSyntaxJava) #define ONIG_SYNTAX_PERL (&OnigSyntaxPerl) #define ONIG_SYNTAX_RUBY (&OnigSyntaxRuby) /* default syntax */ ONIG_EXTERN OnigSyntaxType* OnigDefaultSyntax; #define ONIG_SYNTAX_DEFAULT OnigDefaultSyntax /* syntax (operators) */ #define ONIG_SYN_OP_VARIABLE_META_CHARACTERS (1<<0) #define ONIG_SYN_OP_DOT_ANYCHAR (1<<1) /* . */ #define ONIG_SYN_OP_ASTERISK_ZERO_INF (1<<2) /* * */ #define ONIG_SYN_OP_ESC_ASTERISK_ZERO_INF (1<<3) #define ONIG_SYN_OP_PLUS_ONE_INF (1<<4) /* + */ #define ONIG_SYN_OP_ESC_PLUS_ONE_INF (1<<5) #define ONIG_SYN_OP_QMARK_ZERO_ONE (1<<6) /* ? */ #define ONIG_SYN_OP_ESC_QMARK_ZERO_ONE (1<<7) #define ONIG_SYN_OP_BRACE_INTERVAL (1<<8) /* {lower,upper} */ #define ONIG_SYN_OP_ESC_BRACE_INTERVAL (1<<9) /* \{lower,upper\} */ #define ONIG_SYN_OP_VBAR_ALT (1<<10) /* | */ #define ONIG_SYN_OP_ESC_VBAR_ALT (1<<11) /* \| */ #define ONIG_SYN_OP_LPAREN_SUBEXP (1<<12) /* (...) */ #define ONIG_SYN_OP_ESC_LPAREN_SUBEXP (1<<13) /* $...$ */ #define ONIG_SYN_OP_ESC_AZ_BUF_ANCHOR (1<<14) /* \A, \Z, \z */ #define ONIG_SYN_OP_ESC_CAPITAL_G_BEGIN_ANCHOR (1<<15) /* \G */ #define ONIG_SYN_OP_DECIMAL_BACKREF (1<<16) /* \num */ #define ONIG_SYN_OP_BRACKET_CC (1<<17) /* [...] */ #define ONIG_SYN_OP_ESC_W_WORD (1<<18) /* \w, \W */ #define ONIG_SYN_OP_ESC_LTGT_WORD_BEGIN_END (1<<19) /* \<. \> */ #define ONIG_SYN_OP_ESC_B_WORD_BOUND (1<<20) /* \b, \B */ #define ONIG_SYN_OP_ESC_S_WHITE_SPACE (1<<21) /* \s, \S */ #define ONIG_SYN_OP_ESC_D_DIGIT (1<<22) /* \d, \D */ #define ONIG_SYN_OP_LINE_ANCHOR (1<<23) /* ^, $ */ #define ONIG_SYN_OP_POSIX_BRACKET (1<<24) /* [:xxxx:] */ #define ONIG_SYN_OP_QMARK_NON_GREEDY (1<<25) /* ??,*?,+?,{n,m}? */ #define ONIG_SYN_OP_ESC_CONTROL_CHARS (1<<26) /* \n,\r,\t,\a ... */ #define ONIG_SYN_OP_ESC_C_CONTROL (1<<27) /* \cx */ #define ONIG_SYN_OP_ESC_OCTAL3 (1<<28) /* \OOO */ #define ONIG_SYN_OP_ESC_X_HEX2 (1<<29) /* \xHH */ #define ONIG_SYN_OP_ESC_X_BRACE_HEX8 (1<<30) /* \x{7HHHHHHH} */ #define ONIG_SYN_OP2_ESC_CAPITAL_Q_QUOTE (1<<0) /* \Q...\E */ #define ONIG_SYN_OP2_QMARK_GROUP_EFFECT (1<<1) /* (?...) */ #define ONIG_SYN_OP2_OPTION_PERL (1<<2) /* (?imsx),(?-imsx) */ #define ONIG_SYN_OP2_OPTION_RUBY (1<<3) /* (?imx), (?-imx) */ #define ONIG_SYN_OP2_PLUS_POSSESSIVE_REPEAT (1<<4) /* ?+,*+,++ */ #define ONIG_SYN_OP2_PLUS_POSSESSIVE_INTERVAL (1<<5) /* {n,m}+ */ #define ONIG_SYN_OP2_CCLASS_SET_OP (1<<6) /* [...&&..[..]..] */ #define ONIG_SYN_OP2_QMARK_LT_NAMED_GROUP (1<<7) /* (?...) */ #define ONIG_SYN_OP2_ESC_K_NAMED_BACKREF (1<<8) /* \k */ #define ONIG_SYN_OP2_ESC_G_SUBEXP_CALL (1<<9) /* \g, \g */ #define ONIG_SYN_OP2_ATMARK_CAPTURE_HISTORY (1<<10) /* (?@..),(?@..) */ #define ONIG_SYN_OP2_ESC_CAPITAL_C_BAR_CONTROL (1<<11) /* \C-x */ #define ONIG_SYN_OP2_ESC_CAPITAL_M_BAR_META (1<<12) /* \M-x */ #define ONIG_SYN_OP2_ESC_V_VTAB (1<<13) /* \v as VTAB */ #define ONIG_SYN_OP2_ESC_U_HEX4 (1<<14) /* \uHHHH */ #define ONIG_SYN_OP2_ESC_GNU_BUF_ANCHOR (1<<15) /* \`, \' */ #define ONIG_SYN_OP2_ESC_P_BRACE_CHAR_PROPERTY (1<<16) /* \p{...}, \P{...} */ #define ONIG_SYN_OP2_ESC_P_BRACE_CIRCUMFLEX_NOT (1<<17) /* \p{^..}, \P{^..} */ #define ONIG_SYN_OP2_CHAR_PROPERTY_PREFIX_IS (1<<18) /* \p{IsXDigit} */ #define ONIG_SYN_OP2_ESC_H_XDIGIT (1<<19) /* \h, \H */ /* syntax (behavior) */ #define ONIG_SYN_CONTEXT_INDEP_ANCHORS (1<<31) /* not implemented */ #define ONIG_SYN_CONTEXT_INDEP_REPEAT_OPS (1<<0) /* ?, *, +, {n,m} */ #define ONIG_SYN_CONTEXT_INVALID_REPEAT_OPS (1<<1) /* error or ignore */ #define ONIG_SYN_ALLOW_UNMATCHED_CLOSE_SUBEXP (1<<2) /* ...)... */ #define ONIG_SYN_ALLOW_INVALID_INTERVAL (1<<3) /* {??? */ #define ONIG_SYN_ALLOW_INTERVAL_LOW_ABBREV (1<<4) /* {,n} => {0,n} */ #define ONIG_SYN_STRICT_CHECK_BACKREF (1<<5) /* /(\1)/,/\1()/ ..*/ #define ONIG_SYN_DIFFERENT_LEN_ALT_LOOK_BEHIND (1<<6) /* (?<=a|bc) */ #define ONIG_SYN_CAPTURE_ONLY_NAMED_GROUP (1<<7) /* see doc/RE */ #define ONIG_SYN_ALLOW_MULTIPLEX_DEFINITION_NAME (1<<8) /* (?)(?) */ #define ONIG_SYN_FIXED_INTERVAL_IS_GREEDY_ONLY (1<<9) /* a{n}?=(?:a{n})? */ /* syntax (behavior) in char class [...] */ #define ONIG_SYN_NOT_NEWLINE_IN_NEGATIVE_CC (1<<20) /* [^...] */ #define ONIG_SYN_BACKSLASH_ESCAPE_IN_CC (1<<21) /* [..\w..] etc.. */ #define ONIG_SYN_ALLOW_EMPTY_RANGE_IN_CC (1<<22) #define ONIG_SYN_ALLOW_DOUBLE_RANGE_OP_IN_CC (1<<23) /* [0-9-a]=[0-9\-a] */ /* syntax (behavior) warning */ #define ONIG_SYN_WARN_CC_OP_NOT_ESCAPED (1<<24) /* [,-,] */ #define ONIG_SYN_WARN_REDUNDANT_NESTED_REPEAT (1<<25) /* (?:a*)+ */ /* meta character specifiers (onig_set_meta_char()) */ #define ONIG_META_CHAR_ESCAPE 0 #define ONIG_META_CHAR_ANYCHAR 1 #define ONIG_META_CHAR_ANYTIME 2 #define ONIG_META_CHAR_ZERO_OR_ONE_TIME 3 #define ONIG_META_CHAR_ONE_OR_MORE_TIME 4 #define ONIG_META_CHAR_ANYCHAR_ANYTIME 5 #define ONIG_INEFFECTIVE_META_CHAR 0 /* error codes */ #define ONIG_IS_PATTERN_ERROR(ecode) ((ecode) <= -100 && (ecode) > -1000) /* normal return */ #define ONIG_NORMAL 0 #define ONIG_MISMATCH -1 #define ONIG_NO_SUPPORT_CONFIG -2 /* internal error */ #define ONIGERR_MEMORY -5 #define ONIGERR_TYPE_BUG -6 #define ONIGERR_PARSER_BUG -11 #define ONIGERR_STACK_BUG -12 #define ONIGERR_UNDEFINED_BYTECODE -13 #define ONIGERR_UNEXPECTED_BYTECODE -14 #define ONIGERR_MATCH_STACK_LIMIT_OVER -15 #define ONIGERR_DEFAULT_ENCODING_IS_NOT_SETTED -21 #define ONIGERR_SPECIFIED_ENCODING_CANT_CONVERT_TO_WIDE_CHAR -22 /* general error */ #define ONIGERR_INVALID_ARGUMENT -30 /* syntax error */ #define ONIGERR_END_PATTERN_AT_LEFT_BRACE -100 #define ONIGERR_END_PATTERN_AT_LEFT_BRACKET -101 #define ONIGERR_EMPTY_CHAR_CLASS -102 #define ONIGERR_PREMATURE_END_OF_CHAR_CLASS -103 #define ONIGERR_END_PATTERN_AT_ESCAPE -104 #define ONIGERR_END_PATTERN_AT_META -105 #define ONIGERR_END_PATTERN_AT_CONTROL -106 #define ONIGERR_META_CODE_SYNTAX -108 #define ONIGERR_CONTROL_CODE_SYNTAX -109 #define ONIGERR_CHAR_CLASS_VALUE_AT_END_OF_RANGE -110 #define ONIGERR_CHAR_CLASS_VALUE_AT_START_OF_RANGE -111 #define ONIGERR_UNMATCHED_RANGE_SPECIFIER_IN_CHAR_CLASS -112 #define ONIGERR_TARGET_OF_REPEAT_OPERATOR_NOT_SPECIFIED -113 #define ONIGERR_TARGET_OF_REPEAT_OPERATOR_INVALID -114 #define ONIGERR_NESTED_REPEAT_OPERATOR -115 #define ONIGERR_UNMATCHED_CLOSE_PARENTHESIS -116 #define ONIGERR_END_PATTERN_WITH_UNMATCHED_PARENTHESIS -117 #define ONIGERR_END_PATTERN_IN_GROUP -118 #define ONIGERR_UNDEFINED_GROUP_OPTION -119 #define ONIGERR_INVALID_POSIX_BRACKET_TYPE -121 #define ONIGERR_INVALID_LOOK_BEHIND_PATTERN -122 #define ONIGERR_INVALID_REPEAT_RANGE_PATTERN -123 /* values error (syntax error) */ #define ONIGERR_TOO_BIG_NUMBER -200 #define ONIGERR_TOO_BIG_NUMBER_FOR_REPEAT_RANGE -201 #define ONIGERR_UPPER_SMALLER_THAN_LOWER_IN_REPEAT_RANGE -202 #define ONIGERR_EMPTY_RANGE_IN_CHAR_CLASS -203 #define ONIGERR_MISMATCH_CODE_LENGTH_IN_CLASS_RANGE -204 #define ONIGERR_TOO_MANY_MULTI_BYTE_RANGES -205 #define ONIGERR_TOO_SHORT_MULTI_BYTE_STRING -206 #define ONIGERR_TOO_BIG_BACKREF_NUMBER -207 #define ONIGERR_INVALID_BACKREF -208 #define ONIGERR_NUMBERED_BACKREF_OR_CALL_NOT_ALLOWED -209 #define ONIGERR_TOO_LONG_WIDE_CHAR_VALUE -212 #define ONIGERR_EMPTY_GROUP_NAME -214 #define ONIGERR_INVALID_GROUP_NAME -215 #define ONIGERR_INVALID_CHAR_IN_GROUP_NAME -216 #define ONIGERR_UNDEFINED_NAME_REFERENCE -217 #define ONIGERR_UNDEFINED_GROUP_REFERENCE -218 #define ONIGERR_MULTIPLEX_DEFINED_NAME -219 #define ONIGERR_MULTIPLEX_DEFINITION_NAME_CALL -220 #define ONIGERR_NEVER_ENDING_RECURSION -221 #define ONIGERR_GROUP_NUMBER_OVER_FOR_CAPTURE_HISTORY -222 #define ONIGERR_INVALID_CHAR_PROPERTY_NAME -223 #define ONIGERR_INVALID_WIDE_CHAR_VALUE -400 #define ONIGERR_TOO_BIG_WIDE_CHAR_VALUE -401 #define ONIGERR_NOT_SUPPORTED_ENCODING_COMBINATION -402 /* errors related to thread */ #define ONIGERR_OVER_THREAD_PASS_LIMIT_COUNT -1001 /* must be smaller than BIT_STATUS_BITS_NUM (unsigned int * 8) */ #define ONIG_MAX_CAPTURE_HISTORY_GROUP 31 #define ONIG_IS_CAPTURE_HISTORY_GROUP(r, i) \ ((i) <= ONIG_MAX_CAPTURE_HISTORY_GROUP && (r)->list && (r)->list[i]) typedef struct OnigCaptureTreeNodeStruct { int group; /* group number */ int beg; int end; int allocated; int num_childs; struct OnigCaptureTreeNodeStruct** childs; } OnigCaptureTreeNode; /* match result region type */ struct re_registers { int allocated; int num_regs; int* beg; int* end; /* extended */ OnigCaptureTreeNode* history_root; /* capture history tree root */ }; /* capture tree traverse */ #define ONIG_TRAVERSE_CALLBACK_AT_FIRST 1 #define ONIG_TRAVERSE_CALLBACK_AT_LAST 2 #define ONIG_TRAVERSE_CALLBACK_AT_BOTH \ ( ONIG_TRAVERSE_CALLBACK_AT_FIRST | ONIG_TRAVERSE_CALLBACK_AT_LAST ) #define ONIG_REGION_NOTPOS -1 typedef struct re_registers OnigRegion; typedef struct { UChar* par; UChar* par_end; } OnigErrorInfo; typedef struct { int lower; int upper; } OnigRepeatRange; typedef void (*OnigWarnFunc) P_((const char* s)); extern void onig_null_warn P_((const char* s)); #define ONIG_NULL_WARN onig_null_warn #define ONIG_CHAR_TABLE_SIZE 256 /* regex_t state */ #define ONIG_STATE_NORMAL 0 #define ONIG_STATE_SEARCHING 1 #define ONIG_STATE_COMPILING -1 #define ONIG_STATE_MODIFY -2 #define ONIG_STATE(reg) \ ((reg)->state > 0 ? ONIG_STATE_SEARCHING : (reg)->state) typedef struct re_pattern_buffer { /* common members of BBuf(bytes-buffer) */ unsigned char* p; /* compiled pattern */ unsigned int used; /* used space for p */ unsigned int alloc; /* allocated space for p */ int state; /* normal, searching, compiling */ int num_mem; /* used memory(...) num counted from 1 */ int num_repeat; /* OP_REPEAT/OP_REPEAT_NG id-counter */ int num_null_check; /* OP_NULL_CHECK_START/END id counter */ int num_call; /* number of subexp call */ unsigned int capture_history; /* (?@...) flag (1-31) */ unsigned int bt_mem_start; /* need backtrack flag */ unsigned int bt_mem_end; /* need backtrack flag */ int stack_pop_level; int repeat_range_alloc; OnigRepeatRange* repeat_range; OnigEncoding enc; OnigOptionType options; OnigSyntaxType* syntax; OnigAmbigType ambig_flag; void* name_table; /* optimization info (string search, char-map and anchors) */ int optimize; /* optimize flag */ int threshold_len; /* search str-length for apply optimize */ int anchor; /* BEGIN_BUF, BEGIN_POS, (SEMI_)END_BUF */ OnigDistance anchor_dmin; /* (SEMI_)END_BUF anchor distance */ OnigDistance anchor_dmax; /* (SEMI_)END_BUF anchor distance */ int sub_anchor; /* start-anchor for exact or map */ unsigned char *exact; unsigned char *exact_end; unsigned char map[ONIG_CHAR_TABLE_SIZE]; /* used as BM skip or char-map */ int *int_map; /* BM skip for exact_len > 255 */ int *int_map_backward; /* BM skip for backward search */ OnigDistance dmin; /* min-distance of exact or map */ OnigDistance dmax; /* max-distance of exact or map */ /* regex_t link chain */ struct re_pattern_buffer* chain; /* escape compile-conflict */ } regex_t; typedef struct { int num_of_elements; OnigEncoding pattern_enc; OnigEncoding target_enc; OnigSyntaxType* syntax; OnigOptionType option; OnigAmbigType ambig_flag; } OnigCompileInfo; /* Oniguruma Native API */ ONIG_EXTERN int onig_init P_((void)); ONIG_EXTERN int onig_error_code_to_str PV_((UChar* s, int err_code, ...)); ONIG_EXTERN void onig_set_warn_func P_((OnigWarnFunc f)); ONIG_EXTERN void onig_set_verb_warn_func P_((OnigWarnFunc f)); ONIG_EXTERN int onig_new P_((regex_t**, const UChar* pattern, const UChar* pattern_end, OnigOptionType option, OnigEncoding enc, OnigSyntaxType* syntax, OnigErrorInfo* einfo)); ONIG_EXTERN int onig_new_deluxe P_((regex_t** reg, const UChar* pattern, const UChar* pattern_end, OnigCompileInfo* ci, OnigErrorInfo* einfo)); ONIG_EXTERN void onig_free P_((regex_t*)); ONIG_EXTERN int onig_recompile P_((regex_t*, const UChar* pattern, const UChar* pattern_end, OnigOptionType option, OnigEncoding enc, OnigSyntaxType* syntax, OnigErrorInfo* einfo)); ONIG_EXTERN int onig_recompile_deluxe P_((regex_t* reg, const UChar* pattern, const UChar* pattern_end, OnigCompileInfo* ci, OnigErrorInfo* einfo)); ONIG_EXTERN int onig_search P_((regex_t*, const UChar* str, const UChar* end, const UChar* start, const UChar* range, OnigRegion* region, OnigOptionType option)); ONIG_EXTERN int onig_match P_((regex_t*, const UChar* str, const UChar* end, const UChar* at, OnigRegion* region, OnigOptionType option)); ONIG_EXTERN OnigRegion* onig_region_new P_((void)); ONIG_EXTERN void onig_region_init P_((OnigRegion* region)); ONIG_EXTERN void onig_region_free P_((OnigRegion* region, int free_self)); ONIG_EXTERN void onig_region_copy P_((OnigRegion* to, OnigRegion* from)); ONIG_EXTERN void onig_region_clear P_((OnigRegion* region)); ONIG_EXTERN int onig_region_resize P_((OnigRegion* region, int n)); ONIG_EXTERN int onig_region_set P_((OnigRegion* region, int at, int beg, int end)); ONIG_EXTERN int onig_name_to_group_numbers P_((regex_t* reg, const UChar* name, const UChar* name_end, int** nums)); ONIG_EXTERN int onig_name_to_backref_number P_((regex_t* reg, const UChar* name, const UChar* name_end, OnigRegion *region)); ONIG_EXTERN int onig_foreach_name P_((regex_t* reg, int (*func)(const UChar*, const UChar*,int,int*,regex_t*,void*), void* arg)); ONIG_EXTERN int onig_number_of_names P_((regex_t* reg)); ONIG_EXTERN int onig_number_of_captures P_((regex_t* reg)); ONIG_EXTERN int onig_number_of_capture_histories P_((regex_t* reg)); ONIG_EXTERN OnigCaptureTreeNode* onig_get_capture_tree P_((OnigRegion* region)); ONIG_EXTERN int onig_capture_tree_traverse P_((OnigRegion* region, int at, int(*callback_func)(int,int,int,int,int,void*), void* arg)); ONIG_EXTERN OnigEncoding onig_get_encoding P_((regex_t* reg)); ONIG_EXTERN OnigOptionType onig_get_options P_((regex_t* reg)); ONIG_EXTERN OnigAmbigType onig_get_ambig_flag P_((regex_t* reg)); ONIG_EXTERN OnigSyntaxType* onig_get_syntax P_((regex_t* reg)); ONIG_EXTERN int onig_set_default_syntax P_((OnigSyntaxType* syntax)); ONIG_EXTERN void onig_copy_syntax P_((OnigSyntaxType* to, OnigSyntaxType* from)); ONIG_EXTERN unsigned int onig_get_syntax_op P_((OnigSyntaxType* syntax)); ONIG_EXTERN unsigned int onig_get_syntax_op2 P_((OnigSyntaxType* syntax)); ONIG_EXTERN unsigned int onig_get_syntax_behavior P_((OnigSyntaxType* syntax)); ONIG_EXTERN OnigOptionType onig_get_syntax_options P_((OnigSyntaxType* syntax)); ONIG_EXTERN void onig_set_syntax_op P_((OnigSyntaxType* syntax, unsigned int op)); ONIG_EXTERN void onig_set_syntax_op2 P_((OnigSyntaxType* syntax, unsigned int op2)); ONIG_EXTERN void onig_set_syntax_behavior P_((OnigSyntaxType* syntax, unsigned int behavior)); ONIG_EXTERN void onig_set_syntax_options P_((OnigSyntaxType* syntax, OnigOptionType options)); ONIG_EXTERN int onig_set_meta_char P_((OnigEncoding enc, unsigned int what, OnigCodePoint code)); ONIG_EXTERN void onig_copy_encoding P_((OnigEncoding to, OnigEncoding from)); ONIG_EXTERN OnigAmbigType onig_get_default_ambig_flag P_(()); ONIG_EXTERN int onig_set_default_ambig_flag P_((OnigAmbigType ambig_flag)); ONIG_EXTERN unsigned int onig_get_match_stack_limit_size P_((void)); ONIG_EXTERN int onig_set_match_stack_limit_size P_((unsigned int size)); ONIG_EXTERN int onig_end P_((void)); ONIG_EXTERN const char* onig_version P_((void)); ONIG_EXTERN const char* onig_copyright P_((void)); #ifdef __cplusplus } #endif #endif /* ONIGURUMA_H */ ='n1006' href='#n1006'>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 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/*
 * NET4:	Implementation of BSD Unix domain sockets.
 *
 * Authors:	Alan Cox, <alan@lxorguk.ukuu.org.uk>
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * Fixes:
 *		Linus Torvalds	:	Assorted bug cures.
 *		Niibe Yutaka	:	async I/O support.
 *		Carsten Paeth	:	PF_UNIX check, address fixes.
 *		Alan Cox	:	Limit size of allocated blocks.
 *		Alan Cox	:	Fixed the stupid socketpair bug.
 *		Alan Cox	:	BSD compatibility fine tuning.
 *		Alan Cox	:	Fixed a bug in connect when interrupted.
 *		Alan Cox	:	Sorted out a proper draft version of
 *					file descriptor passing hacked up from
 *					Mike Shaver's work.
 *		Marty Leisner	:	Fixes to fd passing
 *		Nick Nevin	:	recvmsg bugfix.
 *		Alan Cox	:	Started proper garbage collector
 *		Heiko EiBfeldt	:	Missing verify_area check
 *		Alan Cox	:	Started POSIXisms
 *		Andreas Schwab	:	Replace inode by dentry for proper
 *					reference counting
 *		Kirk Petersen	:	Made this a module
 *	    Christoph Rohland	:	Elegant non-blocking accept/connect algorithm.
 *					Lots of bug fixes.
 *	     Alexey Kuznetosv	:	Repaired (I hope) bugs introduces
 *					by above two patches.
 *	     Andrea Arcangeli	:	If possible we block in connect(2)
 *					if the max backlog of the listen socket
 *					is been reached. This won't break
 *					old apps and it will avoid huge amount
 *					of socks hashed (this for unix_gc()
 *					performances reasons).
 *					Security fix that limits the max
 *					number of socks to 2*max_files and
 *					the number of skb queueable in the
 *					dgram receiver.
 *		Artur Skawina   :	Hash function optimizations
 *	     Alexey Kuznetsov   :	Full scale SMP. Lot of bugs are introduced 8)
 *	      Malcolm Beattie   :	Set peercred for socketpair
 *	     Michal Ostrowski   :       Module initialization cleanup.
 *	     Arnaldo C. Melo	:	Remove MOD_{INC,DEC}_USE_COUNT,
 *	     				the core infrastructure is doing that
 *	     				for all net proto families now (2.5.69+)
 *
 *
 * Known differences from reference BSD that was tested:
 *
 *	[TO FIX]
 *	ECONNREFUSED is not returned from one end of a connected() socket to the
 *		other the moment one end closes.
 *	fstat() doesn't return st_dev=0, and give the blksize as high water mark
 *		and a fake inode identifier (nor the BSD first socket fstat twice bug).
 *	[NOT TO FIX]
 *	accept() returns a path name even if the connecting socket has closed
 *		in the meantime (BSD loses the path and gives up).
 *	accept() returns 0 length path for an unbound connector. BSD returns 16
 *		and a null first byte in the path (but not for gethost/peername - BSD bug ??)
 *	socketpair(...SOCK_RAW..) doesn't panic the kernel.
 *	BSD af_unix apparently has connect forgetting to block properly.
 *		(need to check this with the POSIX spec in detail)
 *
 * Differences from 2.0.0-11-... (ANK)
 *	Bug fixes and improvements.
 *		- client shutdown killed server socket.
 *		- removed all useless cli/sti pairs.
 *
 *	Semantic changes/extensions.
 *		- generic control message passing.
 *		- SCM_CREDENTIALS control message.
 *		- "Abstract" (not FS based) socket bindings.
 *		  Abstract names are sequences of bytes (not zero terminated)
 *		  started by 0, so that this name space does not intersect
 *		  with BSD names.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/stat.h>
#include <linux/dcache.h>
#include <linux/namei.h>
#include <linux/socket.h>
#include <linux/un.h>
#include <linux/fcntl.h>
#include <linux/termios.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/in.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <net/af_unix.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/scm.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/rtnetlink.h>
#include <linux/mount.h>
#include <net/checksum.h>
#include <linux/security.h>

static struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1];
static DEFINE_SPINLOCK(unix_table_lock);
static atomic_t unix_nr_socks = ATOMIC_INIT(0);

#define unix_sockets_unbound	(&unix_socket_table[UNIX_HASH_SIZE])

#define UNIX_ABSTRACT(sk)	(unix_sk(sk)->addr->hash != UNIX_HASH_SIZE)

#ifdef CONFIG_SECURITY_NETWORK
static void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)
{
	memcpy(UNIXSID(skb), &scm->secid, sizeof(u32));
}

static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
{
	scm->secid = *UNIXSID(skb);
}
#else
static inline void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)
{ }

static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
{ }
#endif /* CONFIG_SECURITY_NETWORK */

/*
 *  SMP locking strategy:
 *    hash table is protected with spinlock unix_table_lock
 *    each socket state is protected by separate rwlock.
 */

static inline unsigned unix_hash_fold(__wsum n)
{
	unsigned hash = (__force unsigned)n;
	hash ^= hash>>16;
	hash ^= hash>>8;
	return hash&(UNIX_HASH_SIZE-1);
}

#define unix_peer(sk) (unix_sk(sk)->peer)

static inline int unix_our_peer(struct sock *sk, struct sock *osk)
{
	return unix_peer(osk) == sk;
}

static inline int unix_may_send(struct sock *sk, struct sock *osk)
{
	return (unix_peer(osk) == NULL || unix_our_peer(sk, osk));
}

static inline int unix_recvq_full(struct sock const *sk)
{
	return skb_queue_len(&sk->sk_receive_queue) > sk->sk_max_ack_backlog;
}

static struct sock *unix_peer_get(struct sock *s)
{
	struct sock *peer;

	unix_state_lock(s);
	peer = unix_peer(s);
	if (peer)
		sock_hold(peer);
	unix_state_unlock(s);
	return peer;
}

static inline void unix_release_addr(struct unix_address *addr)
{
	if (atomic_dec_and_test(&addr->refcnt))
		kfree(addr);
}

/*
 *	Check unix socket name:
 *		- should be not zero length.
 *	        - if started by not zero, should be NULL terminated (FS object)
 *		- if started by zero, it is abstract name.
 */

static int unix_mkname(struct sockaddr_un * sunaddr, int len, unsigned *hashp)
{
	if (len <= sizeof(short) || len > sizeof(*sunaddr))
		return -EINVAL;
	if (!sunaddr || sunaddr->sun_family != AF_UNIX)
		return -EINVAL;
	if (sunaddr->sun_path[0]) {
		/*
		 * This may look like an off by one error but it is a bit more
		 * subtle. 108 is the longest valid AF_UNIX path for a binding.
		 * sun_path[108] doesnt as such exist.  However in kernel space
		 * we are guaranteed that it is a valid memory location in our
		 * kernel address buffer.
		 */
		((char *)sunaddr)[len]=0;
		len = strlen(sunaddr->sun_path)+1+sizeof(short);
		return len;
	}

	*hashp = unix_hash_fold(csum_partial((char*)sunaddr, len, 0));
	return len;
}

static void __unix_remove_socket(struct sock *sk)
{
	sk_del_node_init(sk);
}

static void __unix_insert_socket(struct hlist_head *list, struct sock *sk)
{
	WARN_ON(!sk_unhashed(sk));
	sk_add_node(sk, list);
}

static inline void unix_remove_socket(struct sock *sk)
{
	spin_lock(&unix_table_lock);
	__unix_remove_socket(sk);
	spin_unlock(&unix_table_lock);
}

static inline void unix_insert_socket(struct hlist_head *list, struct sock *sk)
{
	spin_lock(&unix_table_lock);
	__unix_insert_socket(list, sk);
	spin_unlock(&unix_table_lock);
}

static struct sock *__unix_find_socket_byname(struct net *net,
					      struct sockaddr_un *sunname,
					      int len, int type, unsigned hash)
{
	struct sock *s;
	struct hlist_node *node;

	sk_for_each(s, node, &unix_socket_table[hash ^ type]) {
		struct unix_sock *u = unix_sk(s);

		if (!net_eq(sock_net(s), net))
			continue;

		if (u->addr->len == len &&
		    !memcmp(u->addr->name, sunname, len))
			goto found;
	}
	s = NULL;
found:
	return s;
}

static inline struct sock *unix_find_socket_byname(struct net *net,
						   struct sockaddr_un *sunname,
						   int len, int type,
						   unsigned hash)
{
	struct sock *s;

	spin_lock(&unix_table_lock);
	s = __unix_find_socket_byname(net, sunname, len, type, hash);
	if (s)
		sock_hold(s);
	spin_unlock(&unix_table_lock);
	return s;
}

static struct sock *unix_find_socket_byinode(struct net *net, struct inode *i)
{
	struct sock *s;
	struct hlist_node *node;

	spin_lock(&unix_table_lock);
	sk_for_each(s, node,
		    &unix_socket_table[i->i_ino & (UNIX_HASH_SIZE - 1)]) {
		struct dentry *dentry = unix_sk(s)->dentry;

		if (!net_eq(sock_net(s), net))
			continue;

		if(dentry && dentry->d_inode == i)
		{
			sock_hold(s);
			goto found;
		}
	}
	s = NULL;
found:
	spin_unlock(&unix_table_lock);
	return s;
}

static inline int unix_writable(struct sock *sk)
{
	return (atomic_read(&sk->sk_wmem_alloc) << 2) <= sk->sk_sndbuf;
}

static void unix_write_space(struct sock *sk)
{
	read_lock(&sk->sk_callback_lock);
	if (unix_writable(sk)) {
		if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
			wake_up_interruptible_sync(sk->sk_sleep);
		sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
	}
	read_unlock(&sk->sk_callback_lock);
}

/* When dgram socket disconnects (or changes its peer), we clear its receive
 * queue of packets arrived from previous peer. First, it allows to do
 * flow control based only on wmem_alloc; second, sk connected to peer
 * may receive messages only from that peer. */
static void unix_dgram_disconnected(struct sock *sk, struct sock *other)
{
	if (!skb_queue_empty(&sk->sk_receive_queue)) {
		skb_queue_purge(&sk->sk_receive_queue);
		wake_up_interruptible_all(&unix_sk(sk)->peer_wait);

		/* If one link of bidirectional dgram pipe is disconnected,
		 * we signal error. Messages are lost. Do not make this,
		 * when peer was not connected to us.
		 */
		if (!sock_flag(other, SOCK_DEAD) && unix_peer(other) == sk) {
			other->sk_err = ECONNRESET;
			other->sk_error_report(other);
		}
	}
}

static void unix_sock_destructor(struct sock *sk)
{
	struct unix_sock *u = unix_sk(sk);

	skb_queue_purge(&sk->sk_receive_queue);

	WARN_ON(atomic_read(&sk->sk_wmem_alloc));
	WARN_ON(!sk_unhashed(sk));
	WARN_ON(sk->sk_socket);
	if (!sock_flag(sk, SOCK_DEAD)) {
		printk("Attempt to release alive unix socket: %p\n", sk);
		return;
	}

	if (u->addr)
		unix_release_addr(u->addr);

	atomic_dec(&unix_nr_socks);
#ifdef UNIX_REFCNT_DEBUG
	printk(KERN_DEBUG "UNIX %p is destroyed, %d are still alive.\n", sk, atomic_read(&unix_nr_socks));
#endif
}

static int unix_release_sock (struct sock *sk, int embrion)
{
	struct unix_sock *u = unix_sk(sk);
	struct dentry *dentry;
	struct vfsmount *mnt;
	struct sock *skpair;
	struct sk_buff *skb;
	int state;

	unix_remove_socket(sk);

	/* Clear state */
	unix_state_lock(sk);
	sock_orphan(sk);
	sk->sk_shutdown = SHUTDOWN_MASK;
	dentry	     = u->dentry;
	u->dentry    = NULL;
	mnt	     = u->mnt;
	u->mnt	     = NULL;
	state = sk->sk_state;
	sk->sk_state = TCP_CLOSE;
	unix_state_unlock(sk);

	wake_up_interruptible_all(&u->peer_wait);

	skpair=unix_peer(sk);

	if (skpair!=NULL) {
		if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_SEQPACKET) {
			unix_state_lock(skpair);
			/* No more writes */
			skpair->sk_shutdown = SHUTDOWN_MASK;
			if (!skb_queue_empty(&sk->sk_receive_queue) || embrion)
				skpair->sk_err = ECONNRESET;
			unix_state_unlock(skpair);
			skpair->sk_state_change(skpair);
			read_lock(&skpair->sk_callback_lock);
			sk_wake_async(skpair, SOCK_WAKE_WAITD, POLL_HUP);
			read_unlock(&skpair->sk_callback_lock);
		}
		sock_put(skpair); /* It may now die */
		unix_peer(sk) = NULL;
	}

	/* Try to flush out this socket. Throw out buffers at least */

	while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
		if (state==TCP_LISTEN)
			unix_release_sock(skb->sk, 1);
		/* passed fds are erased in the kfree_skb hook	      */
		kfree_skb(skb);
	}

	if (dentry) {
		dput(dentry);
		mntput(mnt);
	}

	sock_put(sk);

	/* ---- Socket is dead now and most probably destroyed ---- */

	/*
	 * Fixme: BSD difference: In BSD all sockets connected to use get
	 *	  ECONNRESET and we die on the spot. In Linux we behave
	 *	  like files and pipes do and wait for the last
	 *	  dereference.
	 *
	 * Can't we simply set sock->err?
	 *
	 *	  What the above comment does talk about? --ANK(980817)
	 */

	if (unix_tot_inflight)
		unix_gc();		/* Garbage collect fds */

	return 0;
}

static int unix_listen(struct socket *sock, int backlog)
{
	int err;
	struct sock *sk = sock->sk;
	struct unix_sock *u = unix_sk(sk);

	err = -EOPNOTSUPP;
	if (sock->type!=SOCK_STREAM && sock->type!=SOCK_SEQPACKET)
		goto out;			/* Only stream/seqpacket sockets accept */
	err = -EINVAL;
	if (!u->addr)
		goto out;			/* No listens on an unbound socket */
	unix_state_lock(sk);
	if (sk->sk_state != TCP_CLOSE && sk->sk_state != TCP_LISTEN)
		goto out_unlock;
	if (backlog > sk->sk_max_ack_backlog)
		wake_up_interruptible_all(&u->peer_wait);
	sk->sk_max_ack_backlog	= backlog;
	sk->sk_state		= TCP_LISTEN;
	/* set credentials so connect can copy them */
	sk->sk_peercred.pid	= task_tgid_vnr(current);
	sk->sk_peercred.uid	= current->euid;
	sk->sk_peercred.gid	= current->egid;
	err = 0;

out_unlock:
	unix_state_unlock(sk);
out:
	return err;
}

static int unix_release(struct socket *);
static int unix_bind(struct socket *, struct sockaddr *, int);
static int unix_stream_connect(struct socket *, struct sockaddr *,
			       int addr_len, int flags);
static int unix_socketpair(struct socket *, struct socket *);
static int unix_accept(struct socket *, struct socket *, int);
static int unix_getname(struct socket *, struct sockaddr *, int *, int);
static unsigned int unix_poll(struct file *, struct socket *, poll_table *);
static unsigned int unix_dgram_poll(struct file *, struct socket *,
				    poll_table *);
static int unix_ioctl(struct socket *, unsigned int, unsigned long);
static int unix_shutdown(struct socket *, int);
static int unix_stream_sendmsg(struct kiocb *, struct socket *,
			       struct msghdr *, size_t);
static int unix_stream_recvmsg(struct kiocb *, struct socket *,
			       struct msghdr *, size_t, int);
static int unix_dgram_sendmsg(struct kiocb *, struct socket *,
			      struct msghdr *, size_t);
static int unix_dgram_recvmsg(struct kiocb *, struct socket *,
			      struct msghdr *, size_t, int);
static int unix_dgram_connect(struct socket *, struct sockaddr *,
			      int, int);
static int unix_seqpacket_sendmsg(struct kiocb *, struct socket *,
				  struct msghdr *, size_t);

static const struct proto_ops unix_stream_ops = {
	.family =	PF_UNIX,
	.owner =	THIS_MODULE,
	.release =	unix_release,
	.bind =		unix_bind,
	.connect =	unix_stream_connect,
	.socketpair =	unix_socketpair,
	.accept =	unix_accept,
	.getname =	unix_getname,
	.poll =		unix_poll,
	.ioctl =	unix_ioctl,
	.listen =	unix_listen,
	.shutdown =	unix_shutdown,
	.setsockopt =	sock_no_setsockopt,
	.getsockopt =	sock_no_getsockopt,
	.sendmsg =	unix_stream_sendmsg,
	.recvmsg =	unix_stream_recvmsg,
	.mmap =		sock_no_mmap,
	.sendpage =	sock_no_sendpage,
};

static const struct proto_ops unix_dgram_ops = {
	.family =	PF_UNIX,
	.owner =	THIS_MODULE,
	.release =	unix_release,
	.bind =		unix_bind,
	.connect =	unix_dgram_connect,
	.socketpair =	unix_socketpair,
	.accept =	sock_no_accept,
	.getname =	unix_getname,
	.poll =		unix_dgram_poll,
	.ioctl =	unix_ioctl,
	.listen =	sock_no_listen,
	.shutdown =	unix_shutdown,
	.setsockopt =	sock_no_setsockopt,
	.getsockopt =	sock_no_getsockopt,
	.sendmsg =	unix_dgram_sendmsg,
	.recvmsg =	unix_dgram_recvmsg,
	.mmap =		sock_no_mmap,
	.sendpage =	sock_no_sendpage,
};

static const struct proto_ops unix_seqpacket_ops = {
	.family =	PF_UNIX,
	.owner =	THIS_MODULE,
	.release =	unix_release,
	.bind =		unix_bind,
	.connect =	unix_stream_connect,
	.socketpair =	unix_socketpair,
	.accept =	unix_accept,
	.getname =	unix_getname,
	.poll =		unix_dgram_poll,
	.ioctl =	unix_ioctl,
	.listen =	unix_listen,
	.shutdown =	unix_shutdown,
	.setsockopt =	sock_no_setsockopt,
	.getsockopt =	sock_no_getsockopt,
	.sendmsg =	unix_seqpacket_sendmsg,
	.recvmsg =	unix_dgram_recvmsg,
	.mmap =		sock_no_mmap,
	.sendpage =	sock_no_sendpage,
};

static struct proto unix_proto = {
	.name	  = "UNIX",
	.owner	  = THIS_MODULE,
	.obj_size = sizeof(struct unix_sock),
};

/*
 * AF_UNIX sockets do not interact with hardware, hence they
 * dont trigger interrupts - so it's safe for them to have
 * bh-unsafe locking for their sk_receive_queue.lock. Split off
 * this special lock-class by reinitializing the spinlock key:
 */
static struct lock_class_key af_unix_sk_receive_queue_lock_key;

static struct sock * unix_create1(struct net *net, struct socket *sock)
{
	struct sock *sk = NULL;
	struct unix_sock *u;

	atomic_inc(&unix_nr_socks);
	if (atomic_read(&unix_nr_socks) > 2 * get_max_files())
		goto out;

	sk = sk_alloc(net, PF_UNIX, GFP_KERNEL, &unix_proto);
	if (!sk)
		goto out;

	sock_init_data(sock,sk);
	lockdep_set_class(&sk->sk_receive_queue.lock,
				&af_unix_sk_receive_queue_lock_key);

	sk->sk_write_space	= unix_write_space;
	sk->sk_max_ack_backlog	= net->unx.sysctl_max_dgram_qlen;
	sk->sk_destruct		= unix_sock_destructor;
	u	  = unix_sk(sk);
	u->dentry = NULL;
	u->mnt	  = NULL;
	spin_lock_init(&u->lock);
	atomic_long_set(&u->inflight, 0);
	INIT_LIST_HEAD(&u->link);
	mutex_init(&u->readlock); /* single task reading lock */
	init_waitqueue_head(&u->peer_wait);
	unix_insert_socket(unix_sockets_unbound, sk);
out:
	if (sk == NULL)
		atomic_dec(&unix_nr_socks);
	return sk;
}

static int unix_create(struct net *net, struct socket *sock, int protocol)
{
	if (protocol && protocol != PF_UNIX)
		return -EPROTONOSUPPORT;

	sock->state = SS_UNCONNECTED;

	switch (sock->type) {
	case SOCK_STREAM:
		sock->ops = &unix_stream_ops;
		break;
		/*
		 *	Believe it or not BSD has AF_UNIX, SOCK_RAW though
		 *	nothing uses it.
		 */
	case SOCK_RAW:
		sock->type=SOCK_DGRAM;
	case SOCK_DGRAM:
		sock->ops = &unix_dgram_ops;
		break;
	case SOCK_SEQPACKET:
		sock->ops = &unix_seqpacket_ops;
		break;
	default:
		return -ESOCKTNOSUPPORT;
	}

	return unix_create1(net, sock) ? 0 : -ENOMEM;
}

static int unix_release(struct socket *sock)
{
	struct sock *sk = sock->sk;

	if (!sk)
		return 0;

	sock->sk = NULL;

	return unix_release_sock (sk, 0);
}

static int unix_autobind(struct socket *sock)
{
	struct sock *sk = sock->sk;
	struct net *net = sock_net(sk);
	struct unix_sock *u = unix_sk(sk);
	static u32 ordernum = 1;
	struct unix_address * addr;
	int err;

	mutex_lock(&u->readlock);

	err = 0;
	if (u->addr)
		goto out;

	err = -ENOMEM;
	addr = kzalloc(sizeof(*addr) + sizeof(short) + 16, GFP_KERNEL);
	if (!addr)
		goto out;

	addr->name->sun_family = AF_UNIX;
	atomic_set(&addr->refcnt, 1);

retry:
	addr->len = sprintf(addr->name->sun_path+1, "%05x", ordernum) + 1 + sizeof(short);
	addr->hash = unix_hash_fold(csum_partial((void*)addr->name, addr->len, 0));

	spin_lock(&unix_table_lock);
	ordernum = (ordernum+1)&0xFFFFF;

	if (__unix_find_socket_byname(net, addr->name, addr->len, sock->type,
				      addr->hash)) {
		spin_unlock(&unix_table_lock);
		/* Sanity yield. It is unusual case, but yet... */
		if (!(ordernum&0xFF))
			yield();
		goto retry;
	}
	addr->hash ^= sk->sk_type;

	__unix_remove_socket(sk);
	u->addr = addr;
	__unix_insert_socket(&unix_socket_table[addr->hash], sk);
	spin_unlock(&unix_table_lock);
	err = 0;

out:	mutex_unlock(&u->readlock);
	return err;
}

static struct sock *unix_find_other(struct net *net,
				    struct sockaddr_un *sunname, int len,
				    int type, unsigned hash, int *error)
{
	struct sock *u;
	struct path path;
	int err = 0;

	if (sunname->sun_path[0]) {
		struct inode *inode;
		err = kern_path(sunname->sun_path, LOOKUP_FOLLOW, &path);
		if (err)
			goto fail;
		inode = path.dentry->d_inode;
		err = inode_permission(inode, MAY_WRITE);
		if (err)
			goto put_fail;

		err = -ECONNREFUSED;
		if (!S_ISSOCK(inode->i_mode))
			goto put_fail;
		u = unix_find_socket_byinode(net, inode);
		if (!u)
			goto put_fail;

		if (u->sk_type == type)
			touch_atime(path.mnt, path.dentry);

		path_put(&path);

		err=-EPROTOTYPE;
		if (u->sk_type != type) {
			sock_put(u);
			goto fail;
		}
	} else {
		err = -ECONNREFUSED;
		u=unix_find_socket_byname(net, sunname, len, type, hash);
		if (u) {
			struct dentry *dentry;
			dentry = unix_sk(u)->dentry;
			if (dentry)
				touch_atime(unix_sk(u)->mnt, dentry);
		} else
			goto fail;
	}
	return u;

put_fail:
	path_put(&path);
fail:
	*error=err;
	return NULL;
}


static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
{
	struct sock *sk = sock->sk;
	struct net *net = sock_net(sk);
	struct unix_sock *u = unix_sk(sk);
	struct sockaddr_un *sunaddr=(struct sockaddr_un *)uaddr;
	struct dentry * dentry = NULL;
	struct nameidata nd;
	int err;
	unsigned hash;
	struct unix_address *addr;
	struct hlist_head *list;

	err = -EINVAL;
	if (sunaddr->sun_family != AF_UNIX)
		goto out;

	if (addr_len==sizeof(short)) {
		err = unix_autobind(sock);
		goto out;
	}

	err = unix_mkname(sunaddr, addr_len, &hash);
	if (err < 0)
		goto out;
	addr_len = err;

	mutex_lock(&u->readlock);

	err = -EINVAL;
	if (u->addr)
		goto out_up;

	err = -ENOMEM;
	addr = kmalloc(sizeof(*addr)+addr_len, GFP_KERNEL);
	if (!addr)
		goto out_up;

	memcpy(addr->name, sunaddr, addr_len);
	addr->len = addr_len;
	addr->hash = hash ^ sk->sk_type;
	atomic_set(&addr->refcnt, 1);

	if (sunaddr->sun_path[0]) {
		unsigned int mode;
		err = 0;
		/*
		 * Get the parent directory, calculate the hash for last
		 * component.
		 */
		err = path_lookup(sunaddr->sun_path, LOOKUP_PARENT, &nd);
		if (err)
			goto out_mknod_parent;

		dentry = lookup_create(&nd, 0);
		err = PTR_ERR(dentry);
		if (IS_ERR(dentry))
			goto out_mknod_unlock;

		/*
		 * All right, let's create it.
		 */
		mode = S_IFSOCK |
		       (SOCK_INODE(sock)->i_mode & ~current->fs->umask);
		err = mnt_want_write(nd.path.mnt);
		if (err)
			goto out_mknod_dput;
		err = vfs_mknod(nd.path.dentry->d_inode, dentry, mode, 0);
		mnt_drop_write(nd.path.mnt);
		if (err)
			goto out_mknod_dput;
		mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
		dput(nd.path.dentry);
		nd.path.dentry = dentry;

		addr->hash = UNIX_HASH_SIZE;
	}

	spin_lock(&unix_table_lock);

	if (!sunaddr->sun_path[0]) {
		err = -EADDRINUSE;
		if (__unix_find_socket_byname(net, sunaddr, addr_len,
					      sk->sk_type, hash)) {
			unix_release_addr(addr);
			goto out_unlock;
		}

		list = &unix_socket_table[addr->hash];
	} else {
		list = &unix_socket_table[dentry->d_inode->i_ino & (UNIX_HASH_SIZE-1)];
		u->dentry = nd.path.dentry;
		u->mnt    = nd.path.mnt;
	}

	err = 0;
	__unix_remove_socket(sk);
	u->addr = addr;
	__unix_insert_socket(list, sk);

out_unlock:
	spin_unlock(&unix_table_lock);
out_up:
	mutex_unlock(&u->readlock);
out:
	return err;

out_mknod_dput:
	dput(dentry);
out_mknod_unlock:
	mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
	path_put(&nd.path);
out_mknod_parent:
	if (err==-EEXIST)
		err=-EADDRINUSE;
	unix_release_addr(addr);
	goto out_up;
}

static void unix_state_double_lock(struct sock *sk1, struct sock *sk2)
{
	if (unlikely(sk1 == sk2) || !sk2) {
		unix_state_lock(sk1);
		return;
	}
	if (sk1 < sk2) {
		unix_state_lock(sk1);
		unix_state_lock_nested(sk2);
	} else {
		unix_state_lock(sk2);
		unix_state_lock_nested(sk1);
	}
}

static void unix_state_double_unlock(struct sock *sk1, struct sock *sk2)
{
	if (unlikely(sk1 == sk2) || !sk2) {
		unix_state_unlock(sk1);
		return;
	}
	unix_state_unlock(sk1);
	unix_state_unlock(sk2);
}

static int unix_dgram_connect(struct socket *sock, struct sockaddr *addr,
			      int alen, int flags)
{
	struct sock *sk = sock->sk;
	struct net *net = sock_net(sk);
	struct sockaddr_un *sunaddr=(struct sockaddr_un*)addr;
	struct sock *other;
	unsigned hash;
	int err;

	if (addr->sa_family != AF_UNSPEC) {
		err = unix_mkname(sunaddr, alen, &hash);
		if (err < 0)
			goto out;
		alen = err;

		if (test_bit(SOCK_PASSCRED, &sock->flags) &&
		    !unix_sk(sk)->addr && (err = unix_autobind(sock)) != 0)
			goto out;

restart:
		other=unix_find_other(net, sunaddr, alen, sock->type, hash, &err);
		if (!other)
			goto out;

		unix_state_double_lock(sk, other);

		/* Apparently VFS overslept socket death. Retry. */
		if (sock_flag(other, SOCK_DEAD)) {
			unix_state_double_unlock(sk, other);
			sock_put(other);
			goto restart;
		}

		err = -EPERM;
		if (!unix_may_send(sk, other))
			goto out_unlock;

		err = security_unix_may_send(sk->sk_socket, other->sk_socket);
		if (err)
			goto out_unlock;

	} else {
		/*
		 *	1003.1g breaking connected state with AF_UNSPEC
		 */
		other = NULL;
		unix_state_double_lock(sk, other);
	}

	/*
	 * If it was connected, reconnect.
	 */
	if (unix_peer(sk)) {
		struct sock *old_peer = unix_peer(sk);
		unix_peer(sk)=other;
		unix_state_double_unlock(sk, other);

		if (other != old_peer)
			unix_dgram_disconnected(sk, old_peer);
		sock_put(old_peer);
	} else {
		unix_peer(sk)=other;
		unix_state_double_unlock(sk, other);
	}
	return 0;

out_unlock:
	unix_state_double_unlock(sk, other);
	sock_put(other);
out:
	return err;
}

static long unix_wait_for_peer(struct sock *other, long timeo)
{
	struct unix_sock *u = unix_sk(other);
	int sched;
	DEFINE_WAIT(wait);

	prepare_to_wait_exclusive(&u->peer_wait, &wait, TASK_INTERRUPTIBLE);

	sched = !sock_flag(other, SOCK_DEAD) &&
		!(other->sk_shutdown & RCV_SHUTDOWN) &&
		unix_recvq_full(other);

	unix_state_unlock(other);

	if (sched)
		timeo = schedule_timeout(timeo);

	finish_wait(&u->peer_wait, &wait);
	return timeo;
}

static int unix_stream_connect(struct socket *sock, struct sockaddr *uaddr,
			       int addr_len, int flags)
{
	struct sockaddr_un *sunaddr=(struct sockaddr_un *)uaddr;
	struct sock *sk = sock->sk;
	struct net *net = sock_net(sk);
	struct unix_sock *u = unix_sk(sk), *newu, *otheru;
	struct sock *newsk = NULL;
	struct sock *other = NULL;
	struct sk_buff *skb = NULL;
	unsigned hash;
	int st;
	int err;
	long timeo;

	err = unix_mkname(sunaddr, addr_len, &hash);
	if (err < 0)
		goto out;
	addr_len = err;

	if (test_bit(SOCK_PASSCRED, &sock->flags)
		&& !u->addr && (err = unix_autobind(sock)) != 0)
		goto out;

	timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);

	/* First of all allocate resources.
	   If we will make it after state is locked,
	   we will have to recheck all again in any case.
	 */

	err = -ENOMEM;

	/* create new sock for complete connection */
	newsk = unix_create1(sock_net(sk), NULL);
	if (newsk == NULL)
		goto out;

	/* Allocate skb for sending to listening sock */
	skb = sock_wmalloc(newsk, 1, 0, GFP_KERNEL);
	if (skb == NULL)
		goto out;

restart:
	/*  Find listening sock. */
	other = unix_find_other(net, sunaddr, addr_len, sk->sk_type, hash, &err);
	if (!other)
		goto out;

	/* Latch state of peer */
	unix_state_lock(other);

	/* Apparently VFS overslept socket death. Retry. */
	if (sock_flag(other, SOCK_DEAD)) {
		unix_state_unlock(other);
		sock_put(other);
		goto restart;
	}

	err = -ECONNREFUSED;
	if (other->sk_state != TCP_LISTEN)
		goto out_unlock;

	if (unix_recvq_full(other)) {
		err = -EAGAIN;
		if (!timeo)
			goto out_unlock;

		timeo = unix_wait_for_peer(other, timeo);

		err = sock_intr_errno(timeo);
		if (signal_pending(current))
			goto out;
		sock_put(other);
		goto restart;
	}

	/* Latch our state.

	   It is tricky place. We need to grab write lock and cannot
	   drop lock on peer. It is dangerous because deadlock is
	   possible. Connect to self case and simultaneous
	   attempt to connect are eliminated by checking socket
	   state. other is TCP_LISTEN, if sk is TCP_LISTEN we
	   check this before attempt to grab lock.

	   Well, and we have to recheck the state after socket locked.
	 */
	st = sk->sk_state;

	switch (st) {
	case TCP_CLOSE:
		/* This is ok... continue with connect */
		break;
	case TCP_ESTABLISHED:
		/* Socket is already connected */
		err = -EISCONN;
		goto out_unlock;
	default:
		err = -EINVAL;
		goto out_unlock;
	}

	unix_state_lock_nested(sk);

	if (sk->sk_state != st) {
		unix_state_unlock(sk);
		unix_state_unlock(other);
		sock_put(other);
		goto restart;
	}

	err = security_unix_stream_connect(sock, other->sk_socket, newsk);
	if (err) {
		unix_state_unlock(sk);
		goto out_unlock;
	}

	/* The way is open! Fastly set all the necessary fields... */

	sock_hold(sk);
	unix_peer(newsk)	= sk;
	newsk->sk_state		= TCP_ESTABLISHED;
	newsk->sk_type		= sk->sk_type;
	newsk->sk_peercred.pid	= task_tgid_vnr(current);
	newsk->sk_peercred.uid	= current->euid;
	newsk->sk_peercred.gid	= current->egid;
	newu = unix_sk(newsk);
	newsk->sk_sleep		= &newu->peer_wait;
	otheru = unix_sk(other);

	/* copy address information from listening to new sock*/
	if (otheru->addr) {
		atomic_inc(&otheru->addr->refcnt);
		newu->addr = otheru->addr;
	}
	if (otheru->dentry) {
		newu->dentry	= dget(otheru->dentry);
		newu->mnt	= mntget(otheru->mnt);
	}

	/* Set credentials */
	sk->sk_peercred = other->sk_peercred;

	sock->state	= SS_CONNECTED;
	sk->sk_state	= TCP_ESTABLISHED;
	sock_hold(newsk);

	smp_mb__after_atomic_inc();	/* sock_hold() does an atomic_inc() */
	unix_peer(sk)	= newsk;

	unix_state_unlock(sk);

	/* take ten and and send info to listening sock */
	spin_lock(&other->sk_receive_queue.lock);
	__skb_queue_tail(&other->sk_receive_queue, skb);
	spin_unlock(&other->sk_receive_queue.lock);
	unix_state_unlock(other);
	other->sk_data_ready(other, 0);
	sock_put(other);
	return 0;

out_unlock:
	if (other)
		unix_state_unlock(other);

out:
	if (skb)
		kfree_skb(skb);
	if (newsk)
		unix_release_sock(newsk, 0);
	if (other)
		sock_put(other);
	return err;
}

static int unix_socketpair(struct socket *socka, struct socket *sockb)
{
	struct sock *ska=socka->sk, *skb = sockb->sk;

	/* Join our sockets back to back */
	sock_hold(ska);
	sock_hold(skb);
	unix_peer(ska)=skb;
	unix_peer(skb)=ska;
	ska->sk_peercred.pid = skb->sk_peercred.pid = task_tgid_vnr(current);
	ska->sk_peercred.uid = skb->sk_peercred.uid = current->euid;
	ska->sk_peercred.gid = skb->sk_peercred.gid = current->egid;

	if (ska->sk_type != SOCK_DGRAM) {
		ska->sk_state = TCP_ESTABLISHED;
		skb->sk_state = TCP_ESTABLISHED;
		socka->state  = SS_CONNECTED;
		sockb->state  = SS_CONNECTED;
	}
	return 0;
}

static int unix_accept(struct socket *sock, struct socket *newsock, int flags)
{
	struct sock *sk = sock->sk;
	struct sock *tsk;
	struct sk_buff *skb;
	int err;

	err = -EOPNOTSUPP;
	if (sock->type!=SOCK_STREAM && sock->type!=SOCK_SEQPACKET)
		goto out;

	err = -EINVAL;
	if (sk->sk_state != TCP_LISTEN)
		goto out;

	/* If socket state is TCP_LISTEN it cannot change (for now...),
	 * so that no locks are necessary.
	 */

	skb = skb_recv_datagram(sk, 0, flags&O_NONBLOCK, &err);
	if (!skb) {
		/* This means receive shutdown. */
		if (err == 0)
			err = -EINVAL;
		goto out;
	}

	tsk = skb->sk;
	skb_free_datagram(sk, skb);
	wake_up_interruptible(&unix_sk(sk)->peer_wait);

	/* attach accepted sock to socket */
	unix_state_lock(tsk);
	newsock->state = SS_CONNECTED;
	sock_graft(tsk, newsock);
	unix_state_unlock(tsk);
	return 0;

out:
	return err;
}


static int unix_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len, int peer)
{
	struct sock *sk = sock->sk;
	struct unix_sock *u;
	struct sockaddr_un *sunaddr=(struct sockaddr_un *)uaddr;
	int err = 0;

	if (peer) {
		sk = unix_peer_get(sk);

		err = -ENOTCONN;
		if (!sk)
			goto out;
		err = 0;
	} else {
		sock_hold(sk);
	}

	u = unix_sk(sk);
	unix_state_lock(sk);
	if (!u->addr) {
		sunaddr->sun_family = AF_UNIX;
		sunaddr->sun_path[0] = 0;
		*uaddr_len = sizeof(short);
	} else {
		struct unix_address *addr = u->addr;

		*uaddr_len = addr->len;
		memcpy(sunaddr, addr->name, *uaddr_len);
	}
	unix_state_unlock(sk);
	sock_put(sk);
out:
	return err;
}

static void unix_detach_fds(struct scm_cookie *scm, struct sk_buff *skb)
{
	int i;

	scm->fp = UNIXCB(skb).fp;
	skb->destructor = sock_wfree;
	UNIXCB(skb).fp = NULL;

	for (i=scm->fp->count-1; i>=0; i--)
		unix_notinflight(scm->fp->fp[i]);
}

static void unix_destruct_fds(struct sk_buff *skb)
{
	struct scm_cookie scm;
	memset(&scm, 0, sizeof(scm));
	unix_detach_fds(&scm, skb);

	/* Alas, it calls VFS */
	/* So fscking what? fput() had been SMP-safe since the last Summer */
	scm_destroy(&scm);
	sock_wfree(skb);
}

static void unix_attach_fds(struct scm_cookie *scm, struct sk_buff *skb)
{
	int i;
	for (i=scm->fp->count-1; i>=0; i--)
		unix_inflight(scm->fp->fp[i]);
	UNIXCB(skb).fp = scm->fp;
	skb->destructor = unix_destruct_fds;
	scm->fp = NULL;
}

/*
 *	Send AF_UNIX data.
 */

static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock,
			      struct msghdr *msg, size_t len)
{
	struct sock_iocb *siocb = kiocb_to_siocb(kiocb);
	struct sock *sk = sock->sk;
	struct net *net = sock_net(sk);
	struct unix_sock *u = unix_sk(sk);
	struct sockaddr_un *sunaddr=msg->msg_name;
	struct sock *other = NULL;
	int namelen = 0; /* fake GCC */
	int err;
	unsigned hash;
	struct sk_buff *skb;
	long timeo;
	struct scm_cookie tmp_scm;

	if (NULL == siocb->scm)
		siocb->scm = &tmp_scm;
	err = scm_send(sock, msg, siocb->scm);
	if (err < 0)
		return err;

	err = -EOPNOTSUPP;
	if (msg->msg_flags&MSG_OOB)
		goto out;

	if (msg->msg_namelen) {
		err = unix_mkname(sunaddr, msg->msg_namelen, &hash);
		if (err < 0)
			goto out;
		namelen = err;
	} else {
		sunaddr = NULL;
		err = -ENOTCONN;
		other = unix_peer_get(sk);
		if (!other)
			goto out;
	}

	if (test_bit(SOCK_PASSCRED, &sock->flags)
		&& !u->addr && (err = unix_autobind(sock)) != 0)
		goto out;

	err = -EMSGSIZE;
	if (len > sk->sk_sndbuf - 32)
		goto out;

	skb = sock_alloc_send_skb(sk, len, msg->msg_flags&MSG_DONTWAIT, &err);
	if (skb==NULL)
		goto out;

	memcpy(UNIXCREDS(skb), &siocb->scm->creds, sizeof(struct ucred));
	if (siocb->scm->fp)
		unix_attach_fds(siocb->scm, skb);
	unix_get_secdata(siocb->scm, skb);

	skb_reset_transport_header(skb);
	err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len);
	if (err)
		goto out_free;

	timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);

restart:
	if (!other) {
		err = -ECONNRESET;
		if (sunaddr == NULL)
			goto out_free;

		other = unix_find_other(net, sunaddr, namelen, sk->sk_type,
					hash, &err);
		if (other==NULL)
			goto out_free;
	}

	unix_state_lock(other);
	err = -EPERM;
	if (!unix_may_send(sk, other))
		goto out_unlock;

	if (sock_flag(other, SOCK_DEAD)) {
		/*
		 *	Check with 1003.1g - what should
		 *	datagram error
		 */
		unix_state_unlock(other);
		sock_put(other);

		err = 0;
		unix_state_lock(sk);
		if (unix_peer(sk) == other) {
			unix_peer(sk)=NULL;
			unix_state_unlock(sk);

			unix_dgram_disconnected(sk, other);
			sock_put(other);
			err = -ECONNREFUSED;
		} else {
			unix_state_unlock(sk);
		}

		other = NULL;
		if (err)
			goto out_free;
		goto restart;
	}

	err = -EPIPE;
	if (other->sk_shutdown & RCV_SHUTDOWN)
		goto out_unlock;

	if (sk->sk_type != SOCK_SEQPACKET) {
		err = security_unix_may_send(sk->sk_socket, other->sk_socket);
		if (err)
			goto out_unlock;
	}

	if (unix_peer(other) != sk && unix_recvq_full(other)) {
		if (!timeo) {
			err = -EAGAIN;
			goto out_unlock;
		}

		timeo = unix_wait_for_peer(other, timeo);

		err = sock_intr_errno(timeo);
		if (signal_pending(current))
			goto out_free;

		goto restart;
	}

	skb_queue_tail(&other->sk_receive_queue, skb);
	unix_state_unlock(other);
	other->sk_data_ready(other, len);
	sock_put(other);
	scm_destroy(siocb->scm);
	return len;

out_unlock:
	unix_state_unlock(other);
out_free:
	kfree_skb(skb);
out:
	if (other)
		sock_put(other);
	scm_destroy(siocb->scm);
	return err;
}


static int unix_stream_sendmsg(struct kiocb *kiocb, struct socket *sock,
			       struct msghdr *msg, size_t len)
{
	struct sock_iocb *siocb = kiocb_to_siocb(kiocb);
	struct sock *sk = sock->sk;
	struct sock *other = NULL;
	struct sockaddr_un *sunaddr=msg->msg_name;
	int err,size;
	struct sk_buff *skb;
	int sent=0;
	struct scm_cookie tmp_scm;

	if (NULL == siocb->scm)
		siocb->scm = &tmp_scm;
	err = scm_send(sock, msg, siocb->scm);
	if (err < 0)
		return err;

	err = -EOPNOTSUPP;
	if (msg->msg_flags&MSG_OOB)
		goto out_err;

	if (msg->msg_namelen) {
		err = sk->sk_state == TCP_ESTABLISHED ? -EISCONN : -EOPNOTSUPP;
		goto out_err;
	} else {
		sunaddr = NULL;
		err = -ENOTCONN;
		other = unix_peer(sk);
		if (!other)
			goto out_err;
	}

	if (sk->sk_shutdown & SEND_SHUTDOWN)
		goto pipe_err;

	while(sent < len)
	{
		/*
		 *	Optimisation for the fact that under 0.01% of X
		 *	messages typically need breaking up.
		 */

		size = len-sent;

		/* Keep two messages in the pipe so it schedules better */
		if (size > ((sk->sk_sndbuf >> 1) - 64))
			size = (sk->sk_sndbuf >> 1) - 64;

		if (size > SKB_MAX_ALLOC)
			size = SKB_MAX_ALLOC;

		/*
		 *	Grab a buffer
		 */

		skb=sock_alloc_send_skb(sk,size,msg->msg_flags&MSG_DONTWAIT, &err);

		if (skb==NULL)
			goto out_err;

		/*
		 *	If you pass two values to the sock_alloc_send_skb
		 *	it tries to grab the large buffer with GFP_NOFS
		 *	(which can fail easily), and if it fails grab the
		 *	fallback size buffer which is under a page and will
		 *	succeed. [Alan]
		 */
		size = min_t(int, size, skb_tailroom(skb));

		memcpy(UNIXCREDS(skb), &siocb->scm->creds, sizeof(struct ucred));
		if (siocb->scm->fp)
			unix_attach_fds(siocb->scm, skb);

		if ((err = memcpy_fromiovec(skb_put(skb,size), msg->msg_iov, size)) != 0) {
			kfree_skb(skb);
			goto out_err;
		}

		unix_state_lock(other);

		if (sock_flag(other, SOCK_DEAD) ||
		    (other->sk_shutdown & RCV_SHUTDOWN))
			goto pipe_err_free;

		skb_queue_tail(&other->sk_receive_queue, skb);
		unix_state_unlock(other);
		other->sk_data_ready(other, size);
		sent+=size;
	}

	scm_destroy(siocb->scm);
	siocb->scm = NULL;

	return sent;

pipe_err_free:
	unix_state_unlock(other);
	kfree_skb(skb);
pipe_err:
	if (sent==0 && !(msg->msg_flags&MSG_NOSIGNAL))
		send_sig(SIGPIPE,current,0);
	err = -EPIPE;
out_err:
	scm_destroy(siocb->scm);
	siocb->scm = NULL;
	return sent ? : err;
}

static int unix_seqpacket_sendmsg(struct kiocb *kiocb, struct socket *sock,
				  struct msghdr *msg, size_t len)
{
	int err;
	struct sock *sk = sock->sk;

	err = sock_error(sk);
	if (err)
		return err;

	if (sk->sk_state != TCP_ESTABLISHED)
		return -ENOTCONN;

	if (msg->msg_namelen)
		msg->msg_namelen = 0;

	return unix_dgram_sendmsg(kiocb, sock, msg, len);
}

static void unix_copy_addr(struct msghdr *msg, struct sock *sk)
{
	struct unix_sock *u = unix_sk(sk);

	msg->msg_namelen = 0;
	if (u->addr) {
		msg->msg_namelen = u->addr->len;
		memcpy(msg->msg_name, u->addr->name, u->addr->len);
	}
}

static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
			      struct msghdr *msg, size_t size,
			      int flags)
{
	struct sock_iocb *siocb = kiocb_to_siocb(iocb);
	struct scm_cookie tmp_scm;
	struct sock *sk = sock->sk;
	struct unix_sock *u = unix_sk(sk);
	int noblock = flags & MSG_DONTWAIT;
	struct sk_buff *skb;
	int err;

	err = -EOPNOTSUPP;
	if (flags&MSG_OOB)
		goto out;

	msg->msg_namelen = 0;

	mutex_lock(&u->readlock);

	skb = skb_recv_datagram(sk, flags, noblock, &err);
	if (!skb) {
		unix_state_lock(sk);
		/* Signal EOF on disconnected non-blocking SEQPACKET socket. */
		if (sk->sk_type == SOCK_SEQPACKET && err == -EAGAIN &&
		    (sk->sk_shutdown & RCV_SHUTDOWN))
			err = 0;
		unix_state_unlock(sk);
		goto out_unlock;
	}

	wake_up_interruptible_sync(&u->peer_wait);

	if (msg->msg_name)
		unix_copy_addr(msg, skb->sk);

	if (size > skb->len)
		size = skb->len;
	else if (size < skb->len)
		msg->msg_flags |= MSG_TRUNC;

	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, size);
	if (err)
		goto out_free;

	if (!siocb->scm) {
		siocb->scm = &tmp_scm;
		memset(&tmp_scm, 0, sizeof(tmp_scm));
	}
	siocb->scm->creds = *UNIXCREDS(skb);
	unix_set_secdata(siocb->scm, skb);

	if (!(flags & MSG_PEEK))
	{
		if (UNIXCB(skb).fp)
			unix_detach_fds(siocb->scm, skb);
	}
	else
	{
		/* It is questionable: on PEEK we could:
		   - do not return fds - good, but too simple 8)
		   - return fds, and do not return them on read (old strategy,
		     apparently wrong)
		   - clone fds (I chose it for now, it is the most universal
		     solution)

		   POSIX 1003.1g does not actually define this clearly
		   at all. POSIX 1003.1g doesn't define a lot of things
		   clearly however!

		*/
		if (UNIXCB(skb).fp)
			siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
	}
	err = size;

	scm_recv(sock, msg, siocb->scm, flags);

out_free:
	skb_free_datagram(sk,skb);
out_unlock:
	mutex_unlock(&u->readlock);
out:
	return err;
}

/*
 *	Sleep until data has arrive. But check for races..
 */

static long unix_stream_data_wait(struct sock * sk, long timeo)
{
	DEFINE_WAIT(wait);

	unix_state_lock(sk);

	for (;;) {
		prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);

		if (!skb_queue_empty(&sk->sk_receive_queue) ||
		    sk->sk_err ||
		    (sk->sk_shutdown & RCV_SHUTDOWN) ||
		    signal_pending(current) ||
		    !timeo)
			break;

		set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
		unix_state_unlock(sk);
		timeo = schedule_timeout(timeo);
		unix_state_lock(sk);
		clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
	}

	finish_wait(sk->sk_sleep, &wait);
	unix_state_unlock(sk);
	return timeo;
}



static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
			       struct msghdr *msg, size_t size,
			       int flags)
{
	struct sock_iocb *siocb = kiocb_to_siocb(iocb);
	struct scm_cookie tmp_scm;
	struct sock *sk = sock->sk;
	struct unix_sock *u = unix_sk(sk);
	struct sockaddr_un *sunaddr=msg->msg_name;
	int copied = 0;
	int check_creds = 0;
	int target;
	int err = 0;
	long timeo;

	err = -EINVAL;
	if (sk->sk_state != TCP_ESTABLISHED)
		goto out;

	err = -EOPNOTSUPP;
	if (flags&MSG_OOB)
		goto out;

	target = sock_rcvlowat(sk, flags&MSG_WAITALL, size);
	timeo = sock_rcvtimeo(sk, flags&MSG_DONTWAIT);

	msg->msg_namelen = 0;

	/* Lock the socket to prevent queue disordering
	 * while sleeps in memcpy_tomsg
	 */

	if (!siocb->scm) {
		siocb->scm = &tmp_scm;
		memset(&tmp_scm, 0, sizeof(tmp_scm));
	}

	mutex_lock(&u->readlock);

	do
	{
		int chunk;
		struct sk_buff *skb;

		unix_state_lock(sk);
		skb = skb_dequeue(&sk->sk_receive_queue);
		if (skb==NULL)
		{
			if (copied >= target)
				goto unlock;

			/*
			 *	POSIX 1003.1g mandates this order.
			 */

			if ((err = sock_error(sk)) != 0)
				goto unlock;
			if (sk->sk_shutdown & RCV_SHUTDOWN)
				goto unlock;

			unix_state_unlock(sk);
			err = -EAGAIN;
			if (!timeo)
				break;
			mutex_unlock(&u->readlock);

			timeo = unix_stream_data_wait(sk, timeo);

			if (signal_pending(current)) {
				err = sock_intr_errno(timeo);
				goto out;
			}
			mutex_lock(&u->readlock);
			continue;
 unlock:
			unix_state_unlock(sk);
			break;
		}
		unix_state_unlock(sk);

		if (check_creds) {
			/* Never glue messages from different writers */
			if (memcmp(UNIXCREDS(skb), &siocb->scm->creds, sizeof(siocb->scm->creds)) != 0) {
				skb_queue_head(&sk->sk_receive_queue, skb);
				break;
			}
		} else {
			/* Copy credentials */
			siocb->scm->creds = *UNIXCREDS(skb);
			check_creds = 1;
		}

		/* Copy address just once */
		if (sunaddr)
		{
			unix_copy_addr(msg, skb->sk);
			sunaddr = NULL;
		}

		chunk = min_t(unsigned int, skb->len, size);
		if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
			skb_queue_head(&sk->sk_receive_queue, skb);
			if (copied == 0)
				copied = -EFAULT;
			break;
		}
		copied += chunk;
		size -= chunk;

		/* Mark read part of skb as used */
		if (!(flags & MSG_PEEK))
		{
			skb_pull(skb, chunk);

			if (UNIXCB(skb).fp)
				unix_detach_fds(siocb->scm, skb);

			/* put the skb back if we didn't use it up.. */
			if (skb->len)
			{
				skb_queue_head(&sk->sk_receive_queue, skb);
				break;
			}

			kfree_skb(skb);

			if (siocb->scm->fp)
				break;
		}
		else
		{
			/* It is questionable, see note in unix_dgram_recvmsg.
			 */
			if (UNIXCB(skb).fp)
				siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);

			/* put message back and return */
			skb_queue_head(&sk->sk_receive_queue, skb);
			break;
		}
	} while (size);

	mutex_unlock(&u->readlock);
	scm_recv(sock, msg, siocb->scm, flags);
out:
	return copied ? : err;
}

static int unix_shutdown(struct socket *sock, int mode)
{
	struct sock *sk = sock->sk;
	struct sock *other;

	mode = (mode+1)&(RCV_SHUTDOWN|SEND_SHUTDOWN);

	if (mode) {
		unix_state_lock(sk);
		sk->sk_shutdown |= mode;
		other=unix_peer(sk);
		if (other)
			sock_hold(other);
		unix_state_unlock(sk);
		sk->sk_state_change(sk);

		if (other &&
			(sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_SEQPACKET)) {

			int peer_mode = 0;

			if (mode&RCV_SHUTDOWN)
				peer_mode |= SEND_SHUTDOWN;
			if (mode&SEND_SHUTDOWN)
				peer_mode |= RCV_SHUTDOWN;
			unix_state_lock(other);
			other->sk_shutdown |= peer_mode;
			unix_state_unlock(other);
			other->sk_state_change(other);
			read_lock(&other->sk_callback_lock);
			if (peer_mode == SHUTDOWN_MASK)
				sk_wake_async(other, SOCK_WAKE_WAITD, POLL_HUP);
			else if (peer_mode & RCV_SHUTDOWN)
				sk_wake_async(other, SOCK_WAKE_WAITD, POLL_IN);
			read_unlock(&other->sk_callback_lock);
		}
		if (other)
			sock_put(other);
	}
	return 0;
}

static int unix_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	struct sock *sk = sock->sk;
	long amount=0;
	int err;

	switch(cmd)
	{
		case SIOCOUTQ:
			amount = atomic_read(&sk->sk_wmem_alloc);
			err = put_user(amount, (int __user *)arg);
			break;
		case SIOCINQ:
		{
			struct sk_buff *skb;

			if (sk->sk_state == TCP_LISTEN) {
				err = -EINVAL;
				break;
			}

			spin_lock(&sk->sk_receive_queue.lock);
			if (sk->sk_type == SOCK_STREAM ||
			    sk->sk_type == SOCK_SEQPACKET) {
				skb_queue_walk(&sk->sk_receive_queue, skb)
					amount += skb->len;
			} else {
				skb = skb_peek(&sk->sk_receive_queue);
				if (skb)
					amount=skb->len;
			}
			spin_unlock(&sk->sk_receive_queue.lock);
			err = put_user(amount, (int __user *)arg);
			break;
		}

		default:
			err = -ENOIOCTLCMD;
			break;
	}
	return err;
}

static unsigned int unix_poll(struct file * file, struct socket *sock, poll_table *wait)
{
	struct sock *sk = sock->sk;
	unsigned int mask;

	poll_wait(file, sk->sk_sleep, wait);
	mask = 0;

	/* exceptional events? */
	if (sk->sk_err)
		mask |= POLLERR;
	if (sk->sk_shutdown == SHUTDOWN_MASK)
		mask |= POLLHUP;
	if (sk->sk_shutdown & RCV_SHUTDOWN)
		mask |= POLLRDHUP;

	/* readable? */
	if (!skb_queue_empty(&sk->sk_receive_queue) ||
	    (sk->sk_shutdown & RCV_SHUTDOWN))
		mask |= POLLIN | POLLRDNORM;

	/* Connection-based need to check for termination and startup */
	if ((sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_SEQPACKET) && sk->sk_state == TCP_CLOSE)
		mask |= POLLHUP;

	/*
	 * we set writable also when the other side has shut down the
	 * connection. This prevents stuck sockets.
	 */
	if (unix_writable(sk))
		mask |= POLLOUT | POLLWRNORM | POLLWRBAND;

	return mask;
}

static unsigned int unix_dgram_poll(struct file *file, struct socket *sock,
				    poll_table *wait)
{
	struct sock *sk = sock->sk, *other;
	unsigned int mask, writable;

	poll_wait(file, sk->sk_sleep, wait);
	mask = 0;

	/* exceptional events? */
	if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
		mask |= POLLERR;
	if (sk->sk_shutdown & RCV_SHUTDOWN)
		mask |= POLLRDHUP;
	if (sk->sk_shutdown == SHUTDOWN_MASK)
		mask |= POLLHUP;

	/* readable? */
	if (!skb_queue_empty(&sk->sk_receive_queue) ||
	    (sk->sk_shutdown & RCV_SHUTDOWN))
		mask |= POLLIN | POLLRDNORM;

	/* Connection-based need to check for termination and startup */
	if (sk->sk_type == SOCK_SEQPACKET) {
		if (sk->sk_state == TCP_CLOSE)
			mask |= POLLHUP;
		/* connection hasn't started yet? */
		if (sk->sk_state == TCP_SYN_SENT)
			return mask;
	}

	/* writable? */
	writable = unix_writable(sk);
	if (writable) {
		other = unix_peer_get(sk);
		if (other) {
			if (unix_peer(other) != sk) {
				poll_wait(file, &unix_sk(other)->peer_wait,
					  wait);
				if (unix_recvq_full(other))
					writable = 0;
			}

			sock_put(other);
		}
	}

	if (writable)
		mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
	else
		set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);

	return mask;
}

#ifdef CONFIG_PROC_FS
static struct sock *first_unix_socket(int *i)
{
	for (*i = 0; *i <= UNIX_HASH_SIZE; (*i)++) {
		if (!hlist_empty(&unix_socket_table[*i]))
			return __sk_head(&unix_socket_table[*i]);
	}
	return NULL;
}

static struct sock *next_unix_socket(int *i, struct sock *s)
{
	struct sock *next = sk_next(s);
	/* More in this chain? */
	if (next)
		return next;
	/* Look for next non-empty chain. */
	for ((*i)++; *i <= UNIX_HASH_SIZE; (*i)++) {
		if (!hlist_empty(&unix_socket_table[*i]))
			return __sk_head(&unix_socket_table[*i]);
	}
	return NULL;
}

struct unix_iter_state {
	struct seq_net_private p;
	int i;
};
static struct sock *unix_seq_idx(struct seq_file *seq, loff_t pos)
{
	struct unix_iter_state *iter = seq->private;
	loff_t off = 0;
	struct sock *s;

	for (s = first_unix_socket(&iter->i); s; s = next_unix_socket(&iter->i, s)) {
		if (sock_net(s) != seq_file_net(seq))
			continue;
		if (off == pos)
			return s;
		++off;
	}
	return NULL;
}


static void *unix_seq_start(struct seq_file *seq, loff_t *pos)
	__acquires(unix_table_lock)
{
	spin_lock(&unix_table_lock);
	return *pos ? unix_seq_idx(seq, *pos - 1) : SEQ_START_TOKEN;
}

static void *unix_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct unix_iter_state *iter = seq->private;
	struct sock *sk = v;
	++*pos;

	if (v == SEQ_START_TOKEN)
		sk = first_unix_socket(&iter->i);
	else
		sk = next_unix_socket(&iter->i, sk);
	while (sk && (sock_net(sk) != seq_file_net(seq)))
		sk = next_unix_socket(&iter->i, sk);
	return sk;
}

static void unix_seq_stop(struct seq_file *seq, void *v)
	__releases(unix_table_lock)
{
	spin_unlock(&unix_table_lock);
}

static int unix_seq_show(struct seq_file *seq, void *v)
{

	if (v == SEQ_START_TOKEN)
		seq_puts(seq, "Num       RefCount Protocol Flags    Type St "
			 "Inode Path\n");
	else {
		struct sock *s = v;
		struct unix_sock *u = unix_sk(s);
		unix_state_lock(s);

		seq_printf(seq, "%p: %08X %08X %08X %04X %02X %5lu",
			s,
			atomic_read(&s->sk_refcnt),
			0,
			s->sk_state == TCP_LISTEN ? __SO_ACCEPTCON : 0,
			s->sk_type,
			s->sk_socket ?
			(s->sk_state == TCP_ESTABLISHED ? SS_CONNECTED : SS_UNCONNECTED) :
			(s->sk_state == TCP_ESTABLISHED ? SS_CONNECTING : SS_DISCONNECTING),
			sock_i_ino(s));

		if (u->addr) {
			int i, len;
			seq_putc(seq, ' ');

			i = 0;
			len = u->addr->len - sizeof(short);
			if (!UNIX_ABSTRACT(s))
				len--;
			else {
				seq_putc(seq, '@');
				i++;
			}
			for ( ; i < len; i++)
				seq_putc(seq, u->addr->name->sun_path[i]);
		}
		unix_state_unlock(s);
		seq_putc(seq, '\n');
	}

	return 0;
}

static const struct seq_operations unix_seq_ops = {
	.start  = unix_seq_start,
	.next   = unix_seq_next,
	.stop   = unix_seq_stop,
	.show   = unix_seq_show,
};


static int unix_seq_open(struct inode *inode, struct file *file)
{
	return seq_open_net(inode, file, &unix_seq_ops,
			    sizeof(struct unix_iter_state));
}

static const struct file_operations unix_seq_fops = {
	.owner		= THIS_MODULE,
	.open		= unix_seq_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release_net,
};

#endif

static struct net_proto_family unix_family_ops = {
	.family = PF_UNIX,
	.create = unix_create,
	.owner	= THIS_MODULE,
};


static int unix_net_init(struct net *net)
{
	int error = -ENOMEM;

	net->unx.sysctl_max_dgram_qlen = 10;
	if (unix_sysctl_register(net))
		goto out;

#ifdef CONFIG_PROC_FS
	if (!proc_net_fops_create(net, "unix", 0, &unix_seq_fops)) {
		unix_sysctl_unregister(net);
		goto out;
	}
#endif
	error = 0;
out:
	return error;
}

static void unix_net_exit(struct net *net)
{
	unix_sysctl_unregister(net);
	proc_net_remove(net, "unix");
}

static struct pernet_operations unix_net_ops = {
	.init = unix_net_init,
	.exit = unix_net_exit,
};

static int __init af_unix_init(void)
{
	int rc = -1;
	struct sk_buff *dummy_skb;

	BUILD_BUG_ON(sizeof(struct unix_skb_parms) > sizeof(dummy_skb->cb));

	rc = proto_register(&unix_proto, 1);
	if (rc != 0) {
		printk(KERN_CRIT "%s: Cannot create unix_sock SLAB cache!\n",
		       __func__);
		goto out;
	}

	sock_register(&unix_family_ops);
	register_pernet_subsys(&unix_net_ops);
out:
	return rc;
}

static void __exit af_unix_exit(void)
{
	sock_unregister(PF_UNIX);
	proto_unregister(&unix_proto);
	unregister_pernet_subsys(&unix_net_ops);
}

/* Earlier than device_initcall() so that other drivers invoking
   request_module() don't end up in a loop when modprobe tries
   to use a UNIX socket. But later than subsys_initcall() because
   we depend on stuff initialised there */
fs_initcall(af_unix_init);
module_exit(af_unix_exit);

MODULE_LICENSE("GPL");
MODULE_ALIAS_NETPROTO(PF_UNIX);