campo-sirio/cb5/f4create.c

/* f4create.c   (c)Copyright Sequiter Software Inc., 1990-1994.  All rights reserved. */

#include "d4all.h"

#ifndef S4UNIX
#ifdef __TURBOC__
#pragma hdrstop
#endif
#endif

#ifdef S4TEMP
#include "t4test.h"
#endif

#include <time.h>


#ifndef S4UNIX
#ifndef S4IBMOS2
#ifndef __TURBOC__
#include <sys\locking.h>
#define S4LOCKING
#endif
#ifdef __ZTC__
extern int  errno ;
#endif
#ifdef _MSC_VER
#include <sys\types.h>
#include <sys\locking.h>
#endif
#ifdef __TURBOC__
/*      extern int cdecl errno ; */
#endif
#endif

#include <sys\stat.h>
#include <share.h>
#endif

#ifdef S4MACINTOSH
#include <unix.h>
#endif

#include <fcntl.h>
#include <errno.h>

#ifdef S4ERRNO
extern int errno ;
#endif

int S4FUNCTION file4create( FILE4 *file, CODE4 *code_base, char *name, int do_alloc )
{
  int len ;
#ifdef S4WINDOWS
  int exist_handle ;
#else
  int  extra_flag ;
  int  oflag, pmode ;
#endif
#ifdef S4UNIX
#ifdef S4MACINTOSH
  char MACname[128] ;
  FSSpec MACfile ;
#endif
#endif
#ifdef S4WIN32     /* NT defaults */
  DWORD fdwAccess ;
  DWORD fdwShareMode ;
  DWORD fdwCreate ;
#endif

#ifdef S4DEBUG
  if ( file == 0 || code_base == 0 || name == 0 )
    e4severe( e4parm, E4_F4CREATE ) ;
#endif

  memset( (void *)file, 0, sizeof( FILE4 ) ) ;
  file->code_base = code_base ;
  file->hand = -1 ;

  if ( code_base->error_code < 0 )
    return -1 ;
  code_base->error_code = 0 ;

#ifdef S4UNIX
  /* Force to lower case for SCO Foxbase Compatibility */
  if ( code_base->safety )
    extra_flag = O_EXCL ;
  else
    extra_flag = 0 ;

  oflag = (int)(O_CREAT | O_TRUNC | O_RDWR) ;

#ifdef S4MACINTOSH
  file->hand = open( (char *)name, extra_flag | oflag ) ;
  if ( file->hand < 0 )
  {
    if ( code_base->create_error )
      return e4describe( file->code_base, e4create, E4_CREATE_FIL, name, (char *) 0 ) ;
    code_base->error_code = r4no_create ;
    return r4no_create ;
  }
  close( file->hand ) ;

  memcpy( MACname, name, sizeof(MACname) ) ;
  CtoPstr( (char *)MACname ) ;  /* convert C string to Pascal string */

  if (FSMakeFSSpec( 0, 0, MACname, &MACfile ) < 0 )
    return e4describe( file->code_base, e4create, E4_CREATE_FIL, name, (char *) 0 ) ;

  if ( code_base->exclusive )
  {
    if (FSpOpenDF( &MACfile, fsCurPerm, (short *)&file->hand ) < 0 )
      return e4describe( file->code_base, e4create, E4_CREATE_FIL, name, (char *) 0 ) ;
  }
  else
  {
    if (FSpOpenDF( &MACfile, fsRdWrShPerm, (short *)&file->hand ) < 0 )
      return e4describe( file->code_base, e4create, E4_CREATE_FIL, name, (char *) 0 ) ;
  }
#else
  if ( code_base->exclusive )
    pmode = 0600 ;  /* Allow exclusive read/write permission  */
  else
    pmode = 0666 ;  /* Allow full read/write permission  */

  file->hand = open( name, extra_flag | oflag, pmode ) ;
#endif
#else
#ifdef S4WIN32
  if ( code_base->read_only == 1 )
  {
    file->is_read_only = 1 ;
    fdwAccess = GENERIC_READ ;
  }
  else
    fdwAccess = GENERIC_WRITE | GENERIC_READ ;

  if ( code_base->exclusive )
    fdwShareMode = 0 ;
  else
    fdwShareMode = FILE_SHARE_WRITE | FILE_SHARE_READ ;

  if ( code_base->safety )
    fdwCreate = CREATE_NEW ;
  else
    fdwCreate = CREATE_ALWAYS ;

  file->hand = (int) CreateFile( name, fdwAccess, fdwShareMode, 0, fdwCreate, FILE_ATTRIBUTE_NORMAL, 0 ) ;
#else
#ifdef S4WINDOWS
  exist_handle =  -1 ;
  if ( code_base->safety )
    exist_handle = access( name, 0 ) ;  /* if file doesn't exist, create */

  if ( exist_handle < 0 )  /* if file doesn't exist, create */
  {
    /* do initial creation in exclusive mode */
    file->hand = _lcreat( name, 0 ) ;   /* attr == 0 : read/write permission */

    if ( file->hand >= 0 )  /* now that file is created, move to regular r/w mode */
    {
      _lclose( file->hand ) ;
      if ( code_base->exclusive )
        file->hand = _lopen( name, OF_READWRITE | OF_SHARE_EXCLUSIVE ) ;
      else
        file->hand = _lopen( name, OF_READWRITE | OF_SHARE_DENY_NONE ) ;
    }
  }
#else
  oflag = (int)( O_CREAT | O_TRUNC | O_BINARY | O_RDWR ) ;
  pmode = (int)( S_IREAD  | S_IWRITE ) ;
  if ( code_base->safety )
    extra_flag = O_EXCL ;
  else
    extra_flag = 0 ;

  if ( code_base->exclusive )
    file->hand = sopen( name, extra_flag | oflag, SH_DENYWR, pmode ) ;
  else
    file->hand = sopen( name, extra_flag | oflag, SH_DENYNO, pmode ) ;
#endif
#endif
#endif

#ifdef S4WIN32
  if ( file->hand == (int) INVALID_HANDLE_VALUE )
#else
    if ( file->hand < 0 )
#endif
    {
      if ( code_base->create_error )
        return e4describe( file->code_base, e4create, E4_CREATE_FIL, name, (char *) 0 ) ;
      code_base->error_code = r4no_create ;
      return r4no_create ;
    }

  if ( do_alloc )
  {
    len = strlen(name) + 1 ;
    file->name = (char *)u4alloc_er( code_base, len ) ;
    if ( file->name == 0 )
    {
      file4close( file ) ;
      return e4memory ;
    }
    u4ncpy( file->name, name, len ) ;
    file->do_alloc_free = 1 ;
  }
  else
    file->name = name ;

  file->is_exclusive = (char)code_base->exclusive ;
  file->file_created = 1 ;
  return 0 ;
}