SQLite

  { "pwrite64",     (sqlite3_syscall_ptr)pwrite64,   0  },
#else
  { "pwrite64",     (sqlite3_syscall_ptr)0,          0  },
#endif
#define osPwrite64  ((ssize_t(*)(int,const void*,size_t,off_t))\
                    aSyscall[13].pCurrent)


  { "fchmod",       (sqlite3_syscall_ptr)fchmod,     0  },



#define osFchmod    ((int(*)(int,mode_t))aSyscall[14].pCurrent)

#if defined(HAVE_POSIX_FALLOCATE) && HAVE_POSIX_FALLOCATE
  { "fallocate",    (sqlite3_syscall_ptr)posix_fallocate,  0 },
#else
  { "fallocate",    (sqlite3_syscall_ptr)0,                0 },
#endif

  { "rmdir",        (sqlite3_syscall_ptr)rmdir,           0 },
#define osRmdir     ((int(*)(const char*))aSyscall[19].pCurrent)

  { "fchown",       (sqlite3_syscall_ptr)posixFchown,     0 },
#define osFchown    ((int(*)(int,uid_t,gid_t))aSyscall[20].pCurrent)




}; /* End of the overrideable system calls */

/*
** This is the xSetSystemCall() method of sqlite3_vfs for all of the
** "unix" VFSes.  Return SQLITE_OK opon successfully updating the
** system call pointer, or SQLITE_NOTFOUND if there is no configurable
** system call named zName.

** In that way, if a database file is -rw-rw-rw or -rw-rw-r-, and a
** transaction crashes and leaves behind hot journals, then any
** process that is able to write to the database will also be able to
** recover the hot journals.
*/
static int robust_open(const char *z, int f, mode_t m){
  int fd;



  mode_t m2 = m ? m : SQLITE_DEFAULT_FILE_PERMISSIONS;




  do{
#if defined(O_CLOEXEC)
    fd = osOpen(z,f|O_CLOEXEC,m2);
#else
    fd = osOpen(z,f,m2);
#endif
  }while( fd<0 && errno==EINTR );
  if( fd>=0 ){
    if( m!=0 ){
      struct stat statbuf;
      if( osFstat(fd, &statbuf)==0 && (statbuf.st_mode&0777)!=m ){
        osFchmod(fd, m);
      }
    }
#if defined(FD_CLOEXEC) && (!defined(O_CLOEXEC) || O_CLOEXEC==0)
    osFcntl(fd, F_SETFD, osFcntl(fd, F_GETFD, 0) | FD_CLOEXEC);
#endif
  }
  return fd;
}

/*
** Helper functions to obtain and relinquish the global mutex. The
** global mutex is used to protect the unixInodeInfo and
** vxworksFileId objects used by this file, all of which may be 

    UNIXVFS("unix-proxy",    proxyIoFinder ),
#endif
  };
  unsigned int i;          /* Loop counter */

  /* Double-check that the aSyscall[] array has been constructed
  ** correctly.  See ticket [bb3a86e890c8e96ab] */
  assert( ArraySize(aSyscall)==21 );

  /* Register all VFSes defined in the aVfs[] array */
  for(i=0; i<(sizeof(aVfs)/sizeof(sqlite3_vfs)); i++){
    sqlite3_vfs_register(&aVfs[i], i==0);
  }
  return SQLITE_OK; 
}

        }
      }
#endif
      if( is_agg && (pNC->ncFlags & NC_AllowAgg)==0 ){
        sqlite3ErrorMsg(pParse, "misuse of aggregate function %.*s()", nId,zId);
        pNC->nErr++;
        is_agg = 0;
      }else if( no_such_func && pParse->db->init.busy==0 ){
        sqlite3ErrorMsg(pParse, "no such function: %.*s", nId, zId);
        pNC->nErr++;
      }else if( wrong_num_args ){
        sqlite3ErrorMsg(pParse,"wrong number of arguments to function %.*s()",
             nId, zId);
        pNC->nErr++;
      }

** be clear:  this routine converts utf8 to unicode.  This routine is 
** optimized for the common case where the next character is a single byte.
*/
static unsigned re_next_char(ReInput *p){
  unsigned c;
  if( p->i>=p->mx ) return 0;
  c = p->z[p->i++];
  if( c>=0x80 ){
    if( (c&0xe0)==0xc0 && p->i<p->mx && (p->z[p->i]&0xc0)==0x80 ){
      c = (c&0x1f)<<6 | (p->z[p->i++]&0x3f);
      if( c<0x80 ) c = 0xfffd;
    }else if( (c&0xf0)==0xe0 && p->i+1<p->mx && (p->z[p->i]&0xc0)==0x80
           && (p->z[p->i+1]&0xc0)==0x80 ){
      c = (c&0x0f)<<12 | ((p->z[p->i]&0x3f)<<6) | (p->z[p->i+1]&0x3f);
      p->i += 2;
      if( c<=0x3ff || (c>=0xd800 && c<=0xdfff) ) c = 0xfffd;
    }else if( (c&0xf8)==0xf0 && p->i+3<p->mx && (p->z[p->i]&0xc0)==0x80
           && (p->z[p->i+1]&0xc0)==0x80 && (p->z[p->i+2]&0xc0)==0x80 ){
      c = (c&0x07)<<18 | ((p->z[p->i]&0x3f)<<12) | ((p->z[p->i+1]&0x3f)<<6)
                       | (p->z[p->i+2]&0x3f);
      p->i += 3;
      if( c<=0xffff || c>0x10ffff ) c = 0xfffd;
    }else{
      c = 0xfffd;
    }
  }
  return c;
}
static unsigned re_next_char_nocase(ReInput *p){

/* Return true if c is a "digit" character:  [0-9] */
static int re_digit_char(int c){
  return (c>='0' && c<='9');
}

/* Return true if c is a perl "space" character:  [ \t\r\n\v\f] */
static int re_space_char(int c){
  return c==' ' || c=='\t' || c=='\n' || c=='\r' || c=='\v' || c=='\f';
}

/* Run a compiled regular expression on the zero-terminated input
** string zIn[].  Return true on a match and false if there is no match.
*/
int re_match(ReCompiled *pRe, const unsigned char *zIn, int nIn){
  ReStateSet aStateSet[2], *pThis, *pNext;
  ReStateNumber aSpace[100];
  ReStateNumber *pToFree;
  unsigned int i = 0;
  unsigned int iSwap = 0;
  int c = RE_EOF+1;
  int cPrev = 0;
  int rc = 0;
  ReInput in;

  in.z = zIn;
  in.i = 0;
  in.mx = nIn>=0 ? nIn : strlen((char const*)zIn);

  /* Look for the initial prefix match, if there is one. */
  if( pRe->nInit ){
    unsigned char x = pRe->zInit[0];
    while( in.i+pRe->nInit<=in.mx 
        && (zIn[in.i]!=x || memcmp(zIn+in.i, pRe->zInit, pRe->nInit)!=0)
    ){
      in.i++;
    }
    if( in.i+pRe->nInit>in.mx ) return 0;
  }

  if( pRe->nState<=(sizeof(aSpace)/(sizeof(aSpace[0])*2)) ){
    pToFree = 0;
    aStateSet[0].aState = aSpace;
  }else{
    pToFree = sqlite3_malloc( sizeof(ReStateNumber)*2*pRe->nState );
    if( pToFree==0 ) return -1;
    aStateSet[0].aState = pToFree;

  static const char zEsc[] = "afnrtv\\()*.+?[$^{|}]";
  static const char zTrans[] = "\a\f\n\r\t\v";
  int i, v = 0;
  char c;
  if( p->sIn.i>=p->sIn.mx ) return 0;
  c = p->sIn.z[p->sIn.i];
  if( c=='u' && p->sIn.i+5<p->sIn.mx ){

    const unsigned char *zIn = p->sIn.z + p->sIn.i;
    v = 0;
    if( re_hex(zIn[1],&v)
     && re_hex(zIn[2],&v)
     && re_hex(zIn[3],&v)
     && re_hex(zIn[4],&v)
    ){
      p->sIn.i += 5;
      return v;

  if( zIn[0]=='^' ){
    zIn++;
  }else{
    re_append(pRe, RE_OP_ANYSTAR, 0);
  }
  pRe->sIn.z = (unsigned char*)zIn;
  pRe->sIn.i = 0;
  pRe->sIn.mx = strlen(zIn);
  zErr = re_subcompile_re(pRe);
  if( zErr ){
    re_free(pRe);
    return zErr;
  }
  if( rePeek(pRe)=='$' && pRe->sIn.i+1>=pRe->sIn.mx ){
    re_append(pRe, RE_OP_MATCH, RE_EOF);
    re_append(pRe, RE_OP_ACCEPT, 0);
    *ppRe = pRe;
  }else if( pRe->sIn.i>=pRe->sIn.mx ){
    re_append(pRe, RE_OP_ACCEPT, 0);
    *ppRe = pRe;
  }else{
    re_free(pRe);
    return "unrecognized character";
  }

  /* The following is a performance optimization.  If the regex begins with
  ** ".*" (if the input regex lacks an initial "^") and afterwards there are
  ** one or more matching characters, enter those matching characters into
  ** zInit[].  The re_match() routine can then search ahead in the input 
  ** string looking for the initial match without having to run the whole
  ** regex engine over the string.  Do not worry able trying to match
  ** unicode characters beyond plane 0 - those are very rare and this is
  ** just an optimization. */
  if( pRe->aOp[0]==RE_OP_ANYSTAR ){
    for(j=0, i=1; j<sizeof(pRe->zInit)-2 && pRe->aOp[i]==RE_OP_MATCH; i++){
      unsigned x = pRe->aArg[i];
      if( x<=127 ){
        pRe->zInit[j++] = x;
      }else if( x<=0xfff ){
        pRe->zInit[j++] = 0xc0 | (x>>6);
        pRe->zInit[j++] = 0x80 | (x&0x3f);
      }else if( x<=0xffff ){
        pRe->zInit[j++] = 0xd0 | (x>>12);
        pRe->zInit[j++] = 0x80 | ((x>>6)&0x3f);
        pRe->zInit[j++] = 0x80 | (x&0x3f);
      }else{
        break;
      }
    }
    if( j>0 && pRe->zInit[j-1]==0 ) j--;
    pRe->nInit = j;
  }

    ** variable.  */
    if( bSort && (pSrc->jointype & JT_LEFT)==0 ){
      int bRev = 2;
      WHERETRACE(("      --> before isSortingIndex: nPriorSat=%d\n",nPriorSat));
      pc.plan.nOBSat = isSortingIndex(p, pProbe, iCur, &bRev);
      WHERETRACE(("      --> after  isSortingIndex: bRev=%d nOBSat=%d\n",
                  bRev, pc.plan.nOBSat));
      if( nPriorSat<pc.plan.nOBSat || (pc.plan.wsFlags & WHERE_ALL_UNIQUE)!=0 ){
        pc.plan.wsFlags |= WHERE_ORDERED;
      }
      if( nOrderBy==pc.plan.nOBSat ){
        bSort = 0;
        pc.plan.wsFlags |= WHERE_ROWID_RANGE|WHERE_COLUMN_RANGE;
      }
      if( bRev & 1 ) pc.plan.wsFlags |= WHERE_REVERSE;

# This file implements regression tests for SQLite library.  The
# focus of this file is testing CHECK constraints
#
# $Id: check.test,v 1.13 2009/06/05 17:09:12 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set ::testprefix check

# Only run these tests if the build includes support for CHECK constraints
ifcapable !check {
  finish_test
  return
}

} {0 {}}
do_test check-6.15 {
  execsql {SELECT * FROM t1}
} {3 12.0 2 20.0}


}

#--------------------------------------------------------------------------
# If a connection opens a database that contains a CHECK constraint that
# uses an unknown UDF, the schema should not be considered malformed.
# Attempting to modify the table should fail (since the CHECK constraint
# cannot be tested).
#
reset_db
proc myfunc {x} {expr $x < 10}
db func myfunc myfunc

do_execsql_test  7.1 { CREATE TABLE t6(a CHECK (myfunc(a))) }
do_execsql_test  7.2 { INSERT INTO t6 VALUES(9)  }
do_catchsql_test 7.3 { INSERT INTO t6 VALUES(11) } {1 {constraint failed}}

do_test 7.4 {
  sqlite3 db2 test.db
  execsql { SELECT * FROM t6 } db2 
} {9}

do_test 7.5 {
  catchsql { INSERT INTO t6 VALUES(8) } db2
} {1 {unknown function: myfunc()}}

do_test 7.6 {
  catchsql { CREATE TABLE t7(a CHECK (myfunc(a))) } db2
} {1 {no such function: myfunc}}

do_test 7.7 {
  db2 func myfunc myfunc
  execsql { INSERT INTO t6 VALUES(8) } db2
} {}

do_test 7.8 {
  db2 func myfunc myfunc
  catchsql { INSERT INTO t6 VALUES(12) } db2
} {1 {constraint failed}}


finish_test

# 2013 January 09
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is testing that the optimizations that disable
# ORDER BY clauses work correctly on a 3-way join.  See ticket
# http://www.sqlite.org/src/956e4d7f89
#


set testdir [file dirname $argv0]
source $testdir/tester.tcl
set ::testprefix orderby3

# Generate test data for a join.  Verify that the join gets the
# correct answer.
#
do_execsql_test 1.0 {
  CREATE TABLE t1(a INTEGER PRIMARY KEY);
  CREATE TABLE t2(b INTEGER PRIMARY KEY, c INTEGER);
  CREATE TABLE t3(d INTEGER);
    
  INSERT INTO t1 VALUES(1),(2),(3);
    
  INSERT INTO t2 VALUES(3, 1);
  INSERT INTO t2 VALUES(4, 2);
  INSERT INTO t2 VALUES(5, 3);
    
  INSERT INTO t3 VALUES(4),(3),(5);
} {}
do_execsql_test 1.1.asc {
  SELECT t1.a
    FROM t1, t2, t3
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a;
} {1 2 3}
do_execsql_test 1.1.desc {
  SELECT t1.a
    FROM t1, t2, t3
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a DESC;
} {3 2 1}
do_execsql_test 1.123.asc {
  SELECT t1.a
    FROM t1 CROSS JOIN t2 CROSS JOIN t3
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a;
} {1 2 3}
do_execsql_test 1.123.desc {
  SELECT t1.a
    FROM t1 CROSS JOIN t2 CROSS JOIN t3
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a DESC;
} {3 2 1}
do_execsql_test 1.132.asc {
  SELECT t1.a
    FROM t1 CROSS JOIN t3 CROSS JOIN t2
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a;
} {1 2 3}
do_execsql_test 1.132.desc {
  SELECT t1.a
    FROM t1 CROSS JOIN t3 CROSS JOIN t2
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a DESC;
} {3 2 1}
do_execsql_test 1.213.asc {
  SELECT t1.a
    FROM t2 CROSS JOIN t1 CROSS JOIN t3
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a;
} {1 2 3}
do_execsql_test 1.213.desc {
  SELECT t1.a
    FROM t2 CROSS JOIN t1 CROSS JOIN t3
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a DESC;
} {3 2 1}
do_execsql_test 1.231.asc {
  SELECT t1.a
    FROM t2 CROSS JOIN t3 CROSS JOIN t1
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a;
} {1 2 3}
do_execsql_test 1.231.desc {
  SELECT t1.a
    FROM t2 CROSS JOIN t3 CROSS JOIN t1
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a DESC;
} {3 2 1}
do_execsql_test 1.312.asc {
  SELECT t1.a
    FROM t3 CROSS JOIN t1 CROSS JOIN t2
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a;
} {1 2 3}
do_execsql_test 1.312.desc {
  SELECT t1.a
    FROM t3 CROSS JOIN t1 CROSS JOIN t2
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a DESC;
} {3 2 1}
do_execsql_test 1.321.asc {
  SELECT t1.a
    FROM t3 CROSS JOIN t2 CROSS JOIN t1
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a;
} {1 2 3}
do_execsql_test 1.321.desc {
  SELECT t1.a
    FROM t3 CROSS JOIN t2 CROSS JOIN t1
   WHERE t1.a=t2.c AND t2.b=t3.d
   ORDER BY t1.a DESC;
} {3 2 1}

finish_test

    INSERT INTO t1 VALUES('IV', 'sixteen');
    INSERT INTO t1 VALUES('V' , 'twentyfive');
  COMMIT;
} {delete}
tv filter {}
db close
tv delete 
catch {
  test_syscall install fchmod
  test_syscall fault 1 1
}
do_test pager1.4.7.2 {
  faultsim_restore_and_reopen
  catch {file attributes test.db-journal -permissions r--------}
  catch {file attributes test.db-journal -readonly 1}
  catchsql { SELECT * FROM t1 }
} {1 {unable to open database file}}
catch {
  test_syscall reset
  test_syscall fault 0 0
}
do_test pager1.4.7.3 {
  db close
  catch {file attributes test.db-journal -permissions rw-rw-rw-}
  catch {file attributes test.db-journal -readonly 0}
  delete_file test.db-journal
  file exists test.db-journal
} {0}

  fconfigure $fd -encoding binary -translation binary
  seek $fd 0
  puts -nonewline $fd "\xd9\xd5\x05\xf9\x20\xa1\x63\xd7"
  close $fd

  execsql COMMIT
} {}

# Disable fchmod to make sure SQLite itself does not try to change the
# permission bits on us
#
catch {
  test_syscall install fchmod
  test_syscall fault 1 1
}

do_test tkt3457-1.2 {
  forcecopy bak.db-journal test.db-journal
  file attributes test.db-journal -permissions ---------
  catchsql { SELECT * FROM t1 }
} {1 {unable to open database file}}
do_test tkt3457-1.3 {

} {1 {unable to open database file}}

do_test tkt3457-1.5 {
  forcecopy bak.db-journal test.db-journal
  file attributes test.db-journal -permissions rw-rw-rw-
  catchsql { SELECT * FROM t1 }
} {0 {1 2 3 4 5 6}}

# Reenable fchmod
catch {
  test_syscall uninstall
  test_syscall fault 0 0
}

finish_test