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os_dbw.c
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C/C++ Source or Header
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1995-06-27
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3KB
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97 lines
/*
* Program: Operating-system dependent routines -- MS-DOS (B&W) version
*
* Author: Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* Administration Building, AG-44
* Seattle, WA 98195
* Internet: MRC@CAC.Washington.EDU
*
* Date: 11 April 1989
* Last Edited: 26 June 1995
*
* Copyright 1995 by the University of Washington
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted, provided
* that the above copyright notice appears in all copies and that both the
* above copyright notice and this permission notice appear in supporting
* documentation, and that the name of the University of Washington not be
* used in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. This software is made
* available "as is", and
* THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
* WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
* NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
* (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
/* Private function prototypes */
#include "tcp_dos.h" /* must be before osdep includes tcp.h */
#include "mail.h"
#include "osdep.h"
#include <time.h>
#include <errno.h>
#include <sys\timeb.h>
#include "misc.h"
#include "stdlib.h"
#include "bwtcp.h"
#include "fs_dos.c"
#include "ftl_dos.c"
#include "nl_dos.c"
#include "env_dos.c"
#undef write
#define read soread
#define write sowrite
#define close soclose
#include "tcp_dos.c"
/* Return my local host name
* Returns: my local host name
*/
char *mylocalhost (void)
{
char *s;
if (!myLocalHost) { /* known yet? */
/* get local host name from DISPLAY env var */
if (!((s = getenv ("DISPLAY")) || (s = getenv ("display")))) {
mm_log ("Environment variable 'DISPLAY' is not set", ERROR);
s = "random-pc";
}
myLocalHost = cpystr (s);
}
return myLocalHost;
}
/* Look up host address
* Accepts: pointer to pointer to host name
* socket address block
* Returns: non-zero with host address in socket, official host name in host;
* else NIL
*/
long lookuphost (char **host,struct sockaddr_in *sin)
{
char *s = *host; /* in case of error */
sin->sin_addr.s_addr = rhost (host);
if (sin->sin_addr.s_addr == -1) {
*host = s; /* error, restore old host name */
return NIL;
}
*host = cpystr (*host); /* make permanent copy of name */
return T; /* success */
}