From: "Mark E." <snowball3 AT bigfoot DOT com>
To: djgpp-workers AT delorie DOT com
Date: Tue, 5 Jun 2001 14:00:20 -0400
MIME-Version: 1.0
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Subject: scratch _IOAPPEND
Message-ID: <3B1CE5F4.8282.A748BA@localhost>
X-mailer: Pegasus Mail for Win32 (v3.12c)
Reply-To: djgpp-workers AT delorie DOT com

Here's my patch to eliminate _IOAPPEND. I also took Martin's suggestion from 
a while back and added/used __get_fd_flags.

Index: libc/ansi/stdio/fflush.c
===================================================================
RCS file: /cvs/djgpp/djgpp/src/libc/ansi/stdio/fflush.c,v
retrieving revision 1.6
diff -c -p -r1.6 fflush.c
*** libc/ansi/stdio/fflush.c	2001/05/22 20:48:25	1.6
--- libc/ansi/stdio/fflush.c	2001/06/05 17:42:09
***************
*** 11,16 ****
--- 11,17 ----
  #include <unistd.h>
  #include <libc/file.h>
  #include <io.h>
+ #include <libc/fd_props.h>
  
  int
  fflush(FILE *f)
*************** fflush(FILE *f)
*** 30,36 ****
      return 0;
    }
  
!   if (f->_flag & _IOAPPEND)
    {
      int save_errno = errno; /* We don't want llseek()'s setting 
  			       errno to remain. */
--- 31,38 ----
      return 0;
    }
  
!   if (__has_fd_properties(fileno(f))
!       && (__get_fd_flags(fileno(f)) & FILE_DESC_APPEND))
    {
      int save_errno = errno; /* We don't want llseek()'s setting 
  			       errno to remain. */
Index: libc/ansi/stdio/file.doc
===================================================================
RCS file: /cvs/djgpp/djgpp/src/libc/ansi/stdio/file.doc,v
retrieving revision 1.4
diff -c -p -r1.4 file.doc
*** libc/ansi/stdio/file.doc	2000/11/19 06:52:57	1.4
--- libc/ansi/stdio/file.doc	2001/06/05 17:42:09
*************** _IOMYBUF	buffer needs to be freed
*** 28,34 ****
  _IOEOF		file is at EOF
  _IOERR		error occurred
  _IOSTRG		sprintf
- _IOAPPEND	append mode
  _IORMONCL	remove file on close
  _IOUNGETC       buffer contents does not correspond to file
  _IOTERM         file's handle hooked by termios
--- 28,33 ----
Index: libc/ansi/stdio/flsbuf.c
===================================================================
RCS file: /cvs/djgpp/djgpp/src/libc/ansi/stdio/flsbuf.c,v
retrieving revision 1.6
diff -c -p -r1.6 flsbuf.c
*** libc/ansi/stdio/flsbuf.c	2001/05/22 20:48:25	1.6
--- libc/ansi/stdio/flsbuf.c	2001/06/05 17:42:09
***************
*** 11,16 ****
--- 11,17 ----
  #include <go32.h>
  #include <libc/file.h>
  #include <io.h>
+ #include <libc/fd_props.h>
  
  int
  _flsbuf(int c, FILE *f)
*************** _flsbuf(int c, FILE *f)
*** 97,113 ****
  	|| __libc_write_termios_hook == NULL
  	|| __libc_write_termios_hook(fileno(f), base, rn, &n) == 0)
      {
!       if (f->_flag & _IOAPPEND)
        {
  	int save_errno = errno; /* We don't want llseek()'s setting 
  				   errno to remain. */
! 	if( llseek(fileno(f), 0, SEEK_END) == -1 )
  	{
  	  errno = save_errno;
  	  return EOF;
  	}
        }
!       n = _write(fileno(f), base, rn);
      }
      if (n <= 0)
      {
--- 98,116 ----
  	|| __libc_write_termios_hook == NULL
  	|| __libc_write_termios_hook(fileno(f), base, rn, &n) == 0)
      {
!       int fd = fileno(f);
!       if (__has_fd_properties(fd)
!           && (__get_fd_flags(fd) & FILE_DESC_APPEND))
        {
  	int save_errno = errno; /* We don't want llseek()'s setting 
  				   errno to remain. */
!         if( llseek(fd, 0, SEEK_END) == -1 )
  	{
  	  errno = save_errno;
  	  return EOF;
  	}
        }
!       n = _write(fd, base, rn);
      }
      if (n <= 0)
      {
Index: libc/ansi/stdio/fopen.c
===================================================================
RCS file: /cvs/djgpp/djgpp/src/libc/ansi/stdio/fopen.c,v
retrieving revision 1.2
diff -c -p -r1.2 fopen.c
*** libc/ansi/stdio/fopen.c	2001/05/22 20:48:25	1.2
--- libc/ansi/stdio/fopen.c	2001/06/05 17:42:10
*************** fopen(const char *file, const char *mode
*** 68,74 ****
  
    if (*mode == 'a')
    {
-     f->_flag |= _IOAPPEND;
      llseek(fd, 0, SEEK_END);
    }
  
--- 68,73 ----
Index: libc/ansi/stdio/freopen.c
===================================================================
RCS file: /cvs/djgpp/djgpp/src/libc/ansi/stdio/freopen.c,v
retrieving revision 1.4
diff -c -p -r1.4 freopen.c
*** libc/ansi/stdio/freopen.c	2001/05/22 20:48:25	1.4
--- libc/ansi/stdio/freopen.c	2001/06/05 17:42:10
*************** freopen(const char *file, const char *mo
*** 62,68 ****
  
    if (*mode == 'a')
    {
-     f->_flag |= _IOAPPEND;
      llseek(fd, 0, SEEK_END);
    }
  
--- 62,67 ----
Index: libc/posix/stdio/fdopen.c
===================================================================
RCS file: /cvs/djgpp/djgpp/src/libc/posix/stdio/fdopen.c,v
retrieving revision 1.2
diff -c -p -r1.2 fdopen.c
*** libc/posix/stdio/fdopen.c	2001/05/22 20:48:25	1.2
--- libc/posix/stdio/fdopen.c	2001/06/05 17:42:26
***************
*** 1,3 ****
--- 1,4 ----
+ /* Copyright (C) 2001 DJ Delorie, see COPYING.DJ for details */
  /* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
  #include <libc/stubs.h>
  #include <sys/types.h>
***************
*** 7,12 ****
--- 8,14 ----
  #include <io.h>
  #include <libc/file.h>
  #include <libc/local.h>
+ #include <libc/fd_props.h>
  
  FILE *
  fdopen(int fildes, const char *mode)
*************** fdopen(int fildes, const char *mode)
*** 46,56 ****
    else
      oflags |= (_fmode & (O_TEXT|O_BINARY));
  
-   if (*mode == 'a')
-   {
-     f->_flag |= _IOAPPEND;
-   }
- 
    f->_cnt = 0;
    f->_file = fildes;
    f->_bufsiz = 0;
--- 48,53 ----
*************** fdopen(int fildes, const char *mode)
*** 64,69 ****
--- 61,75 ----
    f->_base = f->_ptr = NULL;
  
    setmode(fildes, oflags & (O_TEXT|O_BINARY));
+ 
+   /* Set or clear the append flag according to the mode.  */
+   if (__has_fd_properties(fildes))
+   {
+     if (*mode == 'a')
+       __set_fd_flags(fildes, FILE_DESC_APPEND);
+     else
+       __clear_fd_flags(fildes, FILE_DESC_APPEND);
+   }
  
    return f;
  }
Index: include/libc/fd_props.h
===================================================================
RCS file: /cvs/djgpp/djgpp/include/libc/fd_props.h,v
retrieving revision 1.4
diff -c -p -r1.4 fd_props.h
*** include/libc/fd_props.h	2001/05/22 20:48:25	1.4
--- include/libc/fd_props.h	2001/06/05 17:53:41
*************** static __inline__ void __clear_fd_flags(
*** 60,65 ****
--- 60,70 ----
    __fd_properties[_fd]->flags &= ~_flags;
  }
  
+ static __inline__ unsigned long __get_fd_flags(int _fd)
+ {
+   return __fd_properties[_fd]->flags;
+ }
+ 
  #endif /* !_POSIX_SOURCE */
  #endif /* !__STRICT_ANSI__ */
  #endif /* !__dj_ENFORCE_ANSI_FREESTANDING */