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73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* Copyright (C) 1994 Free Software Foundation, Inc.
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Ported to standalone by Joel Sherrill jsherril@redstone-emh2.army.mil,
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On-Line Applications Research Corporation.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <sysdep.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stddef.h>
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#include "filedesc.h"
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#include <fcntl.h>
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#include <standalone.h>
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/* Write NBYTES of BUF to FD. Return the number written, or -1. */
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ssize_t
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DEFUN(__write, (fd, buf, nbytes),
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int fd AND CONST PTR buf AND size_t nbytes)
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{
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int count;
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CONST char *data = buf;
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if (nbytes == 0)
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return 0;
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if ( !__FD_Is_valid( fd ) || !__FD_Table[ fd ].in_use )
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{
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errno = EBADF;
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return -1;
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}
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if (buf == NULL)
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{
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errno = EINVAL;
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return -1;
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}
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if ( !(__FD_Table[ fd ].flags & (O_WRONLY|O_RDWR)) ) /* is it writeable? */
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{
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errno = EBADF;
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return -1;
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}
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/*
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* All open file descriptors are mapped to the console.
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*/
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for ( count=0 ; count != nbytes ; count++ ) {
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if ( _Console_Putc(data[ count ]) == -1 )
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return -1;
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if ( data[count] == '\n' && _Console_Putc('\r') == -1 )
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return -1;
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}
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return count;
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}
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