mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 06:20:06 +00:00
96aa2d94a2
* libio/Makefile, libio/cleanup.c, libio/clearerr.c, libio/feof.c, libio/ferror.c, libio/fgetc.c, libio/filedoalloc.c, libio/fileno.c, libio/fileops.c, libio/fputc.c, libio/freopen.c, libio/fseek.c, libio/genops.c, libio/getc.c, libio/getchar.c, libio/iofclose.c, libio/iofdopen.c, libio/iofflush.c, libio/iofgetpos.c, libio/iofgets.c, libio/iofopen.c, libio/iofprintf.c, libio/iofputs.c, libio/iofread.c, libio/iofscanf.c, libio/iofsetpos.c, libio/ioftell.c, libio/iofwrite.c, libio/iogetdelim.c, libio/iogetline.c, libio/iogets.c, libio/iolibio.h, libio/iopadn.c, libio/ioprims.c, libio/ioputs.c, libio/ioseekoff.c, libio/ioseekpos.c, libio/iosetbuffer.c, libio/iosetvbuf.c, libio/iosprintf.c, libio/ioungetc.c, libio/iovsprintf.c, libio/iovsscanf.c, libio/libio.h, libio/libioP.h, libio/putc.c, libio/putchar.c, libio/rewind.c, libio/setbuf.c, libio/setlinebuf.c, libio/stdfiles.c, libio/stdio.c, libio/stdio.h, libio/strfile.h, libio/strops.c, libio/vasprintf.c, libio/vscanf.c, libio/vsnprintf.c: New files. Slightly modified version from Linux libc. * libio/memstream.c, libio/vdprintf.c: New files for functions not (yet) part of GNU libio. * libio/iofopncook.c: Implementation of `fopencookie', mainly written by Per Bothner. * stdio-common/getline.c: Adapted to libio. * stdio-common/snprintf.c: Adapted to libio. * stdio-common/vfprintf.c: Adapted to libio. * stdio-common/vfscanf.c: Adapted to libio. * sysdeps/posix/tempname.c: Adapted to libio.
125 lines
3.5 KiB
C
125 lines
3.5 KiB
C
/*
|
|
Copyright (C) 1993, 1994 Free Software Foundation
|
|
|
|
This file is part of the GNU IO Library. This library 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.
|
|
|
|
This library 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 this library; see the file COPYING. If not, write to the Free
|
|
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
As a special exception, if you link this library with files
|
|
compiled with a GNU compiler to produce an executable, this does not cause
|
|
the resulting executable to be covered by the GNU General Public License.
|
|
This exception does not however invalidate any other reasons why
|
|
the executable file might be covered by the GNU General Public License. */
|
|
|
|
#ifdef __STDC__
|
|
#include <stdlib.h>
|
|
#endif
|
|
#include "libioP.h"
|
|
#include <fcntl.h>
|
|
|
|
#ifndef _IO_fcntl
|
|
#define _IO_fcntl fcntl
|
|
#endif
|
|
|
|
_IO_FILE *
|
|
_IO_fdopen (fd, mode)
|
|
int fd;
|
|
const char *mode;
|
|
{
|
|
int read_write;
|
|
int posix_mode = 0;
|
|
struct _IO_FILE_plus *fp;
|
|
int fd_flags;
|
|
|
|
switch (*mode++)
|
|
{
|
|
case 'r':
|
|
read_write = _IO_NO_WRITES;
|
|
break;
|
|
case 'w':
|
|
read_write = _IO_NO_READS;
|
|
break;
|
|
case 'a':
|
|
posix_mode = O_APPEND;
|
|
read_write = _IO_NO_READS|_IO_IS_APPENDING;
|
|
break;
|
|
default:
|
|
#ifdef EINVAL
|
|
errno = EINVAL;
|
|
#endif
|
|
return NULL;
|
|
}
|
|
if (mode[0] == '+' || (mode[0] == 'b' && mode[1] == '+'))
|
|
read_write &= _IO_IS_APPENDING;
|
|
#ifdef F_GETFL
|
|
fd_flags = _IO_fcntl (fd, F_GETFL);
|
|
#ifndef O_ACCMODE
|
|
#define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)
|
|
#endif
|
|
if (fd_flags == -1
|
|
|| ((fd_flags & O_ACCMODE) == O_RDONLY && !(read_write & _IO_NO_WRITES))
|
|
|| ((fd_flags & O_ACCMODE) == O_WRONLY && !(read_write & _IO_NO_READS)))
|
|
return NULL;
|
|
|
|
/* The May 93 draft of P1003.4/D14.1 (redesignated as 1003.1b)
|
|
[System Application Program Interface (API) Amendment 1:
|
|
Realtime Extensions], Rationale B.8.3.3
|
|
Open a Stream on a File Descriptor says:
|
|
|
|
Although not explicitly required by POSIX.1, a good
|
|
implementation of append ("a") mode would cause the
|
|
O_APPEND flag to be set.
|
|
|
|
(Historical implementations [such as Solaris2] do a one-time
|
|
seek in fdopen.)
|
|
|
|
However, we do not turn O_APPEND off if the mode is "w" (even
|
|
though that would seem consistent) because that would be more
|
|
likely to break historical programs.
|
|
*/
|
|
if ((posix_mode & O_APPEND) && !(fd_flags & O_APPEND))
|
|
{
|
|
#ifdef F_SETFL
|
|
if (_IO_fcntl (fd, F_SETFL, fd_flags | O_APPEND) == -1)
|
|
#endif
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
fp = (struct _IO_FILE_plus *) malloc (sizeof (struct _IO_FILE_plus));
|
|
if (fp == NULL)
|
|
return NULL;
|
|
_IO_init (&fp->file, 0);
|
|
_IO_JUMPS (&fp->file) = &_IO_file_jumps;
|
|
_IO_file_init (&fp->file);
|
|
#if !_IO_UNIFIED_JUMPTABLES
|
|
fp->vtable = NULL;
|
|
#endif
|
|
if (_IO_file_attach (&fp->file, fd) == NULL)
|
|
{
|
|
_IO_un_link (&fp->file);
|
|
free (fp);
|
|
return NULL;
|
|
}
|
|
fp->file._flags &= ~_IO_DELETE_DONT_CLOSE;
|
|
|
|
fp->file._IO_file_flags =
|
|
_IO_mask_flags (&fp->file, read_write,
|
|
_IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING);
|
|
|
|
return (_IO_FILE *) fp;
|
|
}
|
|
|
|
weak_alias (_IO_fdopen, fdopen)
|