68 lines
1.4 KiB
C
Executable File
68 lines
1.4 KiB
C
Executable File
/* Copyright (c) 1988 AT&T */
|
|
/* All Rights Reserved */
|
|
|
|
/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
|
|
/* The copyright notice above does not evidence any */
|
|
/* actual or intended publication of such source code. */
|
|
|
|
#ident "@(#)fdopen.c 1.8 92/09/05 SMI" /* SVr4.0 1.16 */
|
|
|
|
/* 3.0 SID # 1.2 */
|
|
/*LINTLIBRARY*/
|
|
/*
|
|
* Unix routine to do an "fopen" on file descriptor
|
|
* The mode has to be repeated because you can't query its
|
|
* status
|
|
*/
|
|
#ifdef __STDC__
|
|
#pragma weak fdopen = _fdopen
|
|
#endif
|
|
#include "synonyms.h"
|
|
#include <stdio.h>
|
|
#include <limits.h>
|
|
#include "stdiom.h"
|
|
#include <thread.h>
|
|
#include <synch.h>
|
|
#include <mtlib.h>
|
|
|
|
|
|
extern long lseek( /* int fd, long offset, int whence */ );
|
|
|
|
FILE *
|
|
fdopen(fd, type) /* associate file desc. with stream */
|
|
int fd;
|
|
const char *type;
|
|
{
|
|
/* iop doesn't need locking since this function is creating it */
|
|
register FILE *iop;
|
|
register int plus;
|
|
register unsigned char flag;
|
|
|
|
if (fd > UCHAR_MAX || (iop = _findiop()) == 0)
|
|
return 0;
|
|
iop->_file = (Uchar)fd;
|
|
switch (type[0])
|
|
{
|
|
default:
|
|
#ifdef _REENTRANT
|
|
iop->_flag = 0; /* release iop */
|
|
#endif
|
|
return 0;
|
|
case 'r':
|
|
flag = _IOREAD;
|
|
break;
|
|
case 'a':
|
|
(void)lseek(fd, 0L, 2);
|
|
/*FALLTHROUGH*/
|
|
case 'w':
|
|
flag = _IOWRT;
|
|
break;
|
|
}
|
|
if ((plus = type[1]) == 'b') /* Unix ignores 'b' ANSI std */
|
|
plus = type[2];
|
|
if (plus == '+')
|
|
flag = _IORW;
|
|
iop->_flag = flag;
|
|
return iop;
|
|
}
|