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/*========================================================================
//
// fileops.cxx
//
// Implementation of ISO C rename(),remove(),tmpnam(),tmpfile() functions
//
//========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 2004 Free Software Foundation, Inc.
//
// eCos 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 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): jlarmour
// Contributors:
// Date: 2004-02-30
// Purpose: Implementation of ISO C rename(),remove(),tmpnam(),tmpfile()
// Description:
// Usage:
//
//####DESCRIPTIONEND####
//======================================================================*/
// CONFIGURATION
#include <pkgconf/system.h>
#include <pkgconf/isoinfra.h>
#include <pkgconf/libc_stdio.h> // Configuration header
// INCLUDES
#include <cyg/infra/cyg_type.h> // Common type definitions and support
#include <cyg/infra/cyg_ass.h> // Common assertion functions
#include <cyg/infra/cyg_trac.h> // Common tracing functions
#include <stdio.h> // Header for this file
#include <errno.h> // errno
#ifdef CYGPKG_LIBC_STDIO_FILEIO // unix-y functions, e.g. stat,rmdir,unlink,...
# include <unistd.h>
# include <fcntl.h>
# include <sys/stat.h>
#endif
#include <cyg/libc/stdio/io.hxx> // I/O definitions
#ifdef CYGPKG_POSIX
# include <pkgconf/posix.h>
# include <cyg/posix/export.h>
#endif
#if defined(CYGINT_ISO_EXIT) && (CYGINT_ISO_EXIT+0)
# include <stdlib.h> // used by tmpfile() for atexit()
#endif
// DEFINES
#ifdef CYGPKG_POSIX
# define CYG_STDIO_FUNCTION_START() CYG_POSIX_FUNCTION_START()
# define CYG_STDIO_FUNCTION_FINISH() CYG_POSIX_FUNCTION_FINISH()
#else
# define CYG_STDIO_FUNCTION_START() CYG_EMPTY_STATEMENT
# define CYG_STDIO_FUNCTION_FINISH() CYG_EMPTY_STATEMENT
#endif
// Handle entry
#define STDIO_ENTRY() \
CYG_REPORT_FUNCTYPE( "returning %d" ); \
CYG_STDIO_FUNCTION_START(); \
#define STDIO_RETURN(err) \
CYG_MACRO_START \
int __retval = 0; \
CYG_STDIO_FUNCTION_FINISH(); \
if( err != 0 ) __retval = -1, errno = err; \
CYG_REPORT_RETVAL( __retval ); \
return __retval; \
CYG_MACRO_END
#define STDIO_RETURN_VALUE(val) \
CYG_MACRO_START \
CYG_STDIO_FUNCTION_FINISH(); \
CYG_REPORT_RETVAL( val ); \
return val; \
CYG_MACRO_END
// FUNCTIONS
///////////////////////////////////////////////////////////////////////////
// remove()
__externC int remove( const char *path ) __THROW
{
int ret;
STDIO_ENTRY();
CYG_CHECK_DATA_PTR( path, "path pointer invalid" );
#ifdef CYGPKG_LIBC_STDIO_FILEIO
struct stat sbuf;
ret = stat( path, &sbuf );
if (0 == ret)
{
if ( S_ISDIR(sbuf.st_mode) )
{
ret = rmdir( path );
} else {
ret = unlink( path );
}
}
#else // !defined(CYGPKG_LIBC_STDIO_FILEIO)
ret = ENOSYS;
#endif
STDIO_RETURN(ret);
} // remove()
///////////////////////////////////////////////////////////////////////////
// rename()
//
// The File I/O package supplies its own complete version of this, so we
// only implement a dummy here.
#ifndef CYGPKG_LIBC_STDIO_FILEIO
__externC int rename( const char *oldname, const char *newname ) __THROW
{
STDIO_ENTRY();
CYG_CHECK_DATA_PTR(oldname, "oldname pointer invalid");
CYG_CHECK_DATA_PTR(newname, "newname pointer invalid");
STDIO_RETURN(ENOSYS);
}
#endif // ifndef CYGPKG_LIBC_STDIO_FILEIO
///////////////////////////////////////////////////////////////////////////
// tmpnam()
__externC char *tmpnam( char *s ) __THROW
{
STDIO_ENTRY();
static char staticbuf[ L_tmpnam ];
#if (TMP_MAX < 256)
typedef cyg_uint8 counttype;
#elif (TMP_MAX < 65536)
typedef cyg_uint16 counttype;
#else
typedef cyg_ucount32 counttype;
#endif
static counttype count;
counttype totaliters=0;
int i;
if ( NULL != s )
CYG_CHECK_DATA_PTR( s, "supplied string pointer invalid" );
else
s = staticbuf;
// start off by making it "tmp00000" etc. so we can fill backwards
// from end without spaces
s[0] = 't'; s[1] = 'm'; s[2] = 'p';
while (totaliters < TMP_MAX)
{
for (i=3; i < (L_tmpnam-1); i++)
{
s[i] = '0';
}
s[i] = '\0';
counttype counttmp = count;
for (i=(L_tmpnam-1); i>2; i--)
{
const char tohex[] = "0123456789abcdef";
s[i] = tohex[counttmp & 0xf];
counttmp = counttmp >> 4;
}
count++;
count %= TMP_MAX; // cycle round
totaliters++;
// s now points to a name candidate
#ifdef CYGPKG_LIBC_STDIO_FILEIO
int fd = open( s, O_RDONLY );
if (fd >= 0)
close(fd);
else if ( ENOENT == errno ) // we have a winner
break;
#else
break; // no real filesystem, so just go with what we've come up with
#endif
}
if ( totaliters == TMP_MAX ) // oops, looped right the way round
s = NULL;
STDIO_RETURN_VALUE( s );
} // tmpnam()
///////////////////////////////////////////////////////////////////////////
// tmpfile()
__externC FILE *tmpfile( void ) __THROW
{
FILE *f;
char fname[L_tmpnam];
char *s;
STDIO_ENTRY();
s = tmpnam( fname );
if ( s == NULL)
f = NULL;
else
{
// fname is now a valid name to use
f = fopen( fname, "wb+" );
#ifdef CYGPKG_LIBC_STDIO_FILEIO
// We can use remove which should mean the file is removed on program
// exit.We ignore the return code though - the standard seems to
// indicate that the return status from this function is solely
// dictated by whether the file could be created.
if (f)
remove( fname );
#endif
}
STDIO_RETURN_VALUE( f );
} // tmpfile()
///////////////////////////////////////////////////////////////////////////
// EOF fileops.cxx
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