NetBSD/usr.bin/tip/remote.c

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/* $NetBSD: remote.c,v 1.17 2006/12/14 17:09:43 christos Exp $ */
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/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
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*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
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#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1992, 1993\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)remote.c 8.1 (Berkeley) 6/6/93";
#endif
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__RCSID("$NetBSD: remote.c,v 1.17 2006/12/14 17:09:43 christos Exp $");
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#endif /* not lint */
#include "pathnames.h"
#include "tip.h"
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/*
* Attributes to be gleened from remote host description
* data base.
*/
static char **caps[] = {
&AT, &DV, &CM, &CU, &EL, &IE, &OE, &PN, &PR, &DI,
&ES, &EX, &FO, &RC, &RE, &PA
};
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static const char *capstrings[] = {
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"at", "dv", "cm", "cu", "el", "ie", "oe", "pn", "pr",
"di", "es", "ex", "fo", "rc", "re", "pa", 0
};
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static const char *db_array[3] = { _PATH_REMOTE, 0, 0 };
#define cgetflag(f) (cgetcap(bp, f, ':') != NULL)
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static void getremcap(char *);
static char tiprecord[] = "tip.record";
static char wspace[] = "\t\n\b\f";
static void
getremcap(char *host)
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{
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const char **p;
char ***q;
char *bp;
char *rempath;
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int status;
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rempath = getenv("REMOTE");
if (rempath != NULL) {
if (*rempath != '/')
/* we have an entry */
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(void)cgetset(rempath);
else { /* we have a path */
db_array[1] = rempath;
db_array[2] = _PATH_REMOTE;
}
}
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if ((status = cgetent(&bp, db_array, host)) < 0) {
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if (DV ||
(host[0] == '/' && access(DV = host, R_OK | W_OK) == 0)) {
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CU = DV;
HO = host;
HW = 1;
DU = 0;
if (!BR)
BR = DEFBR;
FS = DEFFS;
return;
}
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switch(status) {
case -1:
warnx("unknown host %s", host);
break;
case -2:
warnx("can't open host description file");
break;
case -3:
warnx("possible reference loop in host "
"description file");
break;
}
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exit(3);
}
for (p = capstrings, q = caps; *p != NULL; p++, q++)
if (**q == NULL)
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(void)cgetstr(bp, *p, *q);
if (!BR && (cgetnum(bp, "br", &BR) == -1))
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BR = DEFBR;
if (cgetnum(bp, "fs", &FS) == -1)
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FS = DEFFS;
if (DU < 0)
DU = 0;
else
DU = cgetflag("du");
if (DV == NULL) {
errx(3, "%s: missing device spec\n", host);
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}
if (DU && CU == NULL)
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CU = DV;
if (DU && PN == NULL) {
errx(3, "%s: missing phone number\n", host);
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}
HD = cgetflag("hd");
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/*
* This effectively eliminates the "hw" attribute
* from the description file
*/
if (!HW)
HW = (CU == NULL) || (DU && equal(DV, CU));
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HO = host;
/*
* see if uppercase mode should be turned on initially
*/
if (cgetflag("ra"))
setboolean(value(RAISE), 1);
if (cgetflag("ec"))
setboolean(value(ECHOCHECK), 1);
if (cgetflag("be"))
setboolean(value(BEAUTIFY), 1);
if (cgetflag("nb"))
setboolean(value(BEAUTIFY), 0);
if (cgetflag("sc"))
setboolean(value(SCRIPT), 1);
if (cgetflag("tb"))
setboolean(value(TABEXPAND), 1);
if (cgetflag("vb"))
setboolean(value(VERBOSE), 1);
if (cgetflag("nv"))
setboolean(value(VERBOSE), 0);
if (cgetflag("ta"))
setboolean(value(TAND), 1);
if (cgetflag("nt"))
setboolean(value(TAND), 0);
if (cgetflag("rw"))
setboolean(value(RAWFTP), 1);
if (cgetflag("hd"))
setboolean(value(HALFDUPLEX), 1);
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if (cgetflag("dc"))
DC = 1;
if (cgetflag("hf"))
setboolean(value(HARDWAREFLOW), 1);
if (RE == NULL)
RE = tiprecord;
if (EX == NULL)
EX = wspace;
if (ES != NULL)
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(void)vstring("es", ES);
if (FO != NULL)
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(void)vstring("fo", FO);
if (PR != NULL)
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(void)vstring("pr", PR);
if (RC != NULL)
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(void)vstring("rc", RC);
if (cgetnum(bp, "dl", &DL) == -1)
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DL = 0;
if (cgetnum(bp, "cl", &CL) == -1)
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CL = 0;
if (cgetnum(bp, "et", &ET) == -1)
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ET = 10;
}
char *
getremote(char *host)
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{
char *cp;
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static char *next;
static int lookedup = 0;
if (!lookedup) {
if (host == NULL && (host = getenv("HOST")) == NULL) {
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errx(3, "no host specified");
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}
getremcap(host);
next = DV;
lookedup++;
}
/*
* We return a new device each time we're called (to allow
* a rotary action to be simulated)
*/
if (next == NULL)
return (NULL);
if ((cp = strchr(next, ',')) == NULL) {
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DV = next;
next = NULL;
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} else {
*cp++ = '\0';
DV = next;
next = cp;
}
return (DV);
}