/*
* Return a pointer to a string containing information about currently open
* POSIX-level file handles. If _fileinfo is non-zero, this string is
* passed to child processes as an environment string. Each handle's data
* is of the form "PPPPPPPP:OOOOOOOO:MMMMMMMM*", where the Ps represent the
* POSIX-level file number, the Os represent the OS-level file number, and
* the Ms represent the file's mode bits. The Ps, Os, and Ms are all hex
* strings, without zero padding or 0x prefixes to conserve space. Returns
* NULL if there is insufficient memory. The caller is responsible for
* freeing the allocated memory. The returned string begins with
* "C_FILE_INFO=", and so forms a valid environment string.
*/
_WCRTLINK CHAR_TYPE *__F_NAME(__FormPosixHandleStr,__wFormPosixHandleStr)( void )
/*******************************************************************************/
{
extern unsigned __NFiles;
CHAR_TYPE * p;
int posixHandle, osHandle, mode;
CHAR_TYPE curElem[MAX_ELEM_SIZE+1];
CHAR_TYPE buf[9];
size_t len;
/*** Allocate memory for the string ***/
len = (__NFiles*MAX_ELEM_SIZE) + __F_NAME(strlen,wcslen)( STRING( "C_FILE_INFO=" ) ) + 1;
p = lib_malloc( len * sizeof( CHAR_TYPE ) );
if( p == NULL ) return( NULL );
__F_NAME(strcpy,wcscpy)( p, STRING( "C_FILE_INFO=" ) );
/*** Process the open files ***/
for( posixHandle=0; posixHandle<__NFiles; posixHandle++ ) {
__ChkTTYIOMode( posixHandle );
mode = __GetIOMode( posixHandle );
if( mode & _INITIALIZED ) { /* skip it if it's not open */
osHandle = _os_handle( posixHandle );
/*** Build the element string ***/
curElem[0] = NULLCHAR;
__F_NAME(itoa,_itow)( posixHandle, buf, 16 ); /* POSIX handle */
__F_NAME(strcat,wcscat)( curElem, buf );
__F_NAME(strcat,wcscat)( curElem, STRING( ":" ) ); /* separator */
__F_NAME(itoa,_itow)( osHandle, buf, 16 ); /* OS handle */
__F_NAME(strcat,wcscat)( curElem, buf );
__F_NAME(strcat,wcscat)( curElem, STRING( ":" ) ); /* separator */
__F_NAME(itoa,_itow)( mode, buf, 16 ); /* file mode */
__F_NAME(strcat,wcscat)( curElem, buf );
__F_NAME(strcat,wcscat)( curElem, STRING( "*" ) ); /* terminator */
__F_NAME(strcat,wcscat)( p, curElem ); /* append it */
}
}
return( p );
}
_WCRTLINK int read( int handle, void *buf, unsigned len )
{
unsigned read_len, total_len;
unsigned reduce_idx, finish_idx;
unsigned iomode_flags;
char *buffer = buf;
BOOL rc;
HANDLE h;
unsigned amount_read;
int err;
__file_handle *fh;
__handle_check( handle, -1 );
__ChkTTYIOMode( handle );
iomode_flags = __GetIOMode( handle );
if( iomode_flags == 0 )
{
__set_errno( EBADF );
return( -1 );
}
if( !(iomode_flags & _READ) )
{
__set_errno( EACCES ); /* changed from EBADF to EACCES 23-feb-89 */
return( -1 );
}
fh = (__file_handle*) __getOSHandle( handle );
if( iomode_flags & _BINARY ) /* if binary mode */
{
err=read_file(fh->name,buffer,fh->offset,len,&amount_read);
fh->offset+=amount_read;
total_len = amount_read;
if(err)
if ( amount_read == 0)
return (-1);
}
else
{
total_len = 0;
read_len = len;
do
{
err=read_file(fh->name,buffer,fh->offset,len,&amount_read);
fh->offset+=amount_read;
if( amount_read == 0 )
break; /* EOF */
reduce_idx = 0;
finish_idx = reduce_idx;
for( ; reduce_idx < amount_read; ++reduce_idx )
{
if( buffer[ reduce_idx ] == 0x1a ) /* EOF */
{
__lseek( handle,
((long)reduce_idx - (long)amount_read)+1L,
SEEK_CUR );
total_len += finish_idx;
return( total_len );
}
if( buffer[ reduce_idx ] != '\r' )
{
buffer[ finish_idx++ ] = buffer[ reduce_idx ];
};
}
total_len += finish_idx;
buffer += finish_idx;
read_len -= finish_idx;
if( iomode_flags & _ISTTY )
{
break; /* 04-feb-88, FWC */
}
} while( read_len != 0 );
}
return( total_len );
}
static int __F_NAME(__sopen,__wsopen)( const CHAR_TYPE *name, int mode,
int shflag, va_list args )
{
int rwmode;
int handle;
int attr;
int permission;
unsigned iomode_flags;
tiny_ret_t rc;
char dummy;
#ifdef __WIDECHAR__
char mbName[MB_CUR_MAX * _MAX_PATH]; /* single-byte char */
#endif
handle = -1;
rc = 0;
while( *name == STRING( ' ' ) )
++name;
#ifdef __WIDECHAR__
/*** If necessary, convert the wide filename to multibyte form ***/
if( wcstombs( mbName, name, sizeof( mbName ) ) == -1 ) {
mbName[0] = '\0';
}
#endif
rwmode = mode & ( O_RDONLY | O_WRONLY | O_RDWR | O_NOINHERIT );
if( _dos_open( __F_NAME(name,mbName), rwmode | shflag, &handle ) == 0 ) {
if( handle >= __NFiles ) {
TinyClose( handle );
__set_errno( EMFILE );
return( -1 );
}
}
/* 17-apr-90 05-sep-91 */
if( (mode & (O_RDONLY | O_WRONLY | O_RDWR)) != O_RDONLY ) {
if( handle != -1 ) {
if( ! isatty( handle ) ) { /* if not a device */
#if 0
rc = TinyAccess( name, 0 ); /* check for existence */
if( TINY_ERROR( rc ) ) { /* file does not exist */
TinyClose( handle ); /* close whatever file we got */
handle = -1;
} else if( mode & O_EXCL ) { /* must not exist */
#else
/*
Don't need to do the access check, since the file was opened
and therefore must exist (TinyOpen can't create a file).
We don't want to do the check because there are classes of items
in the file system namespace that are not devices, but the TinyAccess
will fail on (e.g. named pipes).
*/
/* must not exist if O_CREAT specified */
if( (mode & O_EXCL) && (mode & O_CREAT) ) {
#endif
TinyClose( handle );
__set_errno( EEXIST );
return( -1 );
} else if( mode & O_TRUNC ) { /* truncate file */
rc = TinyWrite( handle, &dummy, 0 );
if( TINY_ERROR( rc ) ) {
TinyClose( handle );
return( __set_errno_dos( TINY_INFO( rc ) ) );
}
}
}
}
}
if( handle == -1 ) { /* could not open */
if( (mode & O_CREAT) == 0 || _RWD_doserrno != E_nofile ) {
return( -1 );
}
/* creating the file */
permission = va_arg( args, int );
va_end( args );
if( permission == 0 )
permission = S_IWRITE | S_IREAD;
permission &= ~_RWD_umaskval; /* 05-jan-95 */
attr = 0;
if(( permission & S_IWRITE) == 0 )
attr = _A_RDONLY;
#if 0
/* remove this support because it is not consistently available */
if( _RWD_osmajor >= 5
#ifdef __DOS_EXT__
&& !_IsFlashTek()
&& !_IsRational()
#endif
) {
/* this function is only available in version DOS 5 and up */
/* this new way was added to handle the case of creating a */
/* new file with read-only access, but with a writeable */
/* file handle */
#ifdef __WIDECHAR__
rc = TinyCreateEx( mbName, rwmode|shflag, attr, TIO_OPEN );
#else
rc = TinyCreateEx( name, rwmode|shflag, attr, TIO_OPEN );
#endif
if( TINY_ERROR( rc ) ) {
return( __set_errno_dos( TINY_INFO( rc ) ) );
}
handle = TINY_INFO( rc );
} else
#endif
{
/* do it the old way */
if( _dos_creat( __F_NAME(name,mbName), attr, &handle ) ) {
return( -1 );
}
if( handle >= __NFiles ) {
TinyClose( handle );
__set_errno( EMFILE );
return( -1 );
}
/* 21-nov-90 AFS: the file is created so now the file must be */
/* opened with the correct share permissions */
if( shflag != 0 ) {
rc = TinyClose( handle );
if( TINY_ERROR( rc ) ) {
return( __set_errno_dos( TINY_INFO( rc ) ) );
}
if( _dos_open( __F_NAME(name,mbName), rwmode | shflag, &handle ) ) {
return( -1 );
}
/* handle does not equal -1 now */
}
}
}
iomode_flags = __GetIOMode( handle );
iomode_flags &= ~(_READ|_WRITE|_APPEND|_BINARY); /* 11-aug-88 */
if( isatty( handle ) ) iomode_flags |= _ISTTY;
rwmode &= ~O_NOINHERIT;
if( rwmode == O_RDWR ) iomode_flags |= _READ | _WRITE;
if( rwmode == O_RDONLY) iomode_flags |= _READ;
if( rwmode == O_WRONLY) iomode_flags |= _WRITE;
if( mode & O_APPEND ) iomode_flags |= _APPEND;
if( mode & (O_BINARY|O_TEXT) ) {
if( mode & O_BINARY ) iomode_flags |= _BINARY;
} else {
if( _RWD_fmode == O_BINARY ) iomode_flags |= _BINARY;
}
__SetIOMode( handle, iomode_flags );
#ifdef DEFAULT_WINDOWING
if( _WindowsNewWindow != 0 ) {
if( !__F_NAME(stricmp,wcscmp)( name, STRING( "con" ) ) ) {
_WindowsNewWindow( NULL, handle, -1 );
}
}
#endif
return( handle );
}
#if 0 /* couldn't find any user; please re-enable if it's necessary */
#ifndef __WIDECHAR__ /* compile one version only */
int __set_binary( int handle )
{
unsigned iomode_flags;
__ChkTTYIOMode( handle );
iomode_flags = __GetIOMode( handle );
iomode_flags |= _BINARY;
__SetIOMode( handle, iomode_flags );
if( iomode_flags & _ISTTY ) {
tiny_ret_t rc;
rc = TinyGetDeviceInfo( handle );
if( TINY_ERROR( rc ) ) {
return( __set_errno_dos( TINY_INFO( rc ) ) );
}
rc = TinySetDeviceInfo( handle, TINY_INFO(rc) | TIO_CTL_RAW );
if( TINY_ERROR( rc ) ) {
return( __set_errno_dos( TINY_INFO( rc ) ) );
}
}
return( 0 );
}
_WCRTLINK int read( int handle, void *buf, unsigned len )
#endif
{
unsigned read_len, total_len;
unsigned reduce_idx, finish_idx;
unsigned iomode_flags;
char *buffer = buf;
#if defined(__NT__)
DWORD amount_read;
BOOL rc;
HANDLE h;
#elif defined(__WARP__)
ULONG amount_read;
#elif defined(__OS2_286__)
USHORT amount_read;
#else
unsigned amount_read;
#endif
#if !defined(__NT__)
tiny_ret_t rc;
#endif
#ifdef DEFAULT_WINDOWING
LPWDATA res;
#endif
__handle_check( handle, -1 );
__ChkTTYIOMode( handle );
iomode_flags = __GetIOMode( handle );
if( iomode_flags == 0 ) {
#if defined( __WINDOWS__ ) || defined( __WINDOWS_386__ )
return( _lread( handle, buffer, len ) );
#else
_RWD_errno = EBADF;
return( -1 );
#endif
}
if( !(iomode_flags & _READ) ) {
_RWD_errno = EACCES; /* changed from EBADF to EACCES 23-feb-89 */
return( -1 );
}
#ifdef __NT__
h = __getOSHandle( handle );
#endif
if( iomode_flags & _BINARY ) { /* if binary mode */
#ifdef DEFAULT_WINDOWING
if( _WindowsStdin != 0 &&
(res = _WindowsIsWindowedHandle( handle )) != 0 ) {
total_len = _WindowsStdin( res, buffer, len );
rc = 0;
} else
#endif
{
#if defined(__NT__)
rc = ReadFile( h, buffer, len, &amount_read, NULL );
total_len = amount_read;
if( !rc ) {
if (GetLastError() == ERROR_BROKEN_PIPE)
return total_len;
return( __set_errno_nt() );
}
#elif defined( __OS2__ )
rc = DosRead( handle, buffer, len, &amount_read );
total_len = amount_read;
#else
rc = TinyRead( handle, buffer, len );
total_len = TINY_LINFO( rc );
#endif
}
#if !defined(__NT__)
if( TINY_ERROR( rc ) ) {
return( __set_errno_dos( TINY_INFO( rc ) ) );
}
#endif
} else {
_AccessFileH( handle );
total_len = 0;
read_len = len;
do {
#ifdef DEFAULT_WINDOWING
if( _WindowsStdin != 0 &&
(res = _WindowsIsWindowedHandle( handle )) != 0L ) {
amount_read = _WindowsStdin( res, buffer, read_len );
rc = 0;
} else
#endif
{
#if defined(__NT__)
rc = ReadFile( h, buffer, read_len, &amount_read, NULL );
if( !rc ) {
_ReleaseFileH( handle );
if( GetLastError() == ERROR_BROKEN_PIPE )
return total_len;
return( __set_errno_nt() );
}
#elif defined( __OS2__ )
rc = DosRead( handle, buffer, read_len, &amount_read );
#else
rc = TinyRead( handle, buffer, read_len );
amount_read = TINY_LINFO( rc );
#endif
}
#if !defined(__NT__)
if( TINY_ERROR( rc ) ) {
_ReleaseFileH( handle );
return( __set_errno_dos( TINY_INFO( rc ) ) );
}
#endif
if( amount_read == 0 ) { /* EOF */
break;
}
reduce_idx = 0;
finish_idx = reduce_idx;
for( ; reduce_idx < amount_read; ++reduce_idx ) {
if( buffer[ reduce_idx ] == 0x1a ) { /* EOF */
__lseek( handle,
((long)reduce_idx - (long)amount_read)+1L,
SEEK_CUR );
total_len += finish_idx;
_ReleaseFileH( handle );
return( total_len );
}
if( buffer[ reduce_idx ] != '\r' ) {
buffer[ finish_idx++ ] = buffer[ reduce_idx ];
}
}
total_len += finish_idx;
buffer += finish_idx;
read_len -= finish_idx;
if( iomode_flags & _ISTTY ) {
break; /* 04-feb-88, FWC */
}
} while( read_len != 0 );
_ReleaseFileH( handle );
}
return( total_len );
}
