440 lines
12 KiB
C
440 lines
12 KiB
C
#ifndef __GNO__
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)getent.c 8.2 (Berkeley) 12/15/93";
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#endif
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#endif /* not lint */
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#include <stdlib.h>
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#include <string.h>
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#include "misc-proto.h"
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static char *area;
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static char gettytab[] = "/etc/gettytab";
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/*ARGSUSED*/
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int
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getent(char *cp __unused, const char *name)
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{
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int retval;
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char *tempnam, *dba[2] = { gettytab, NULL };
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tempnam = strdup(name);
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retval = cgetent(&area, dba, tempnam) == 0 ? 1 : 0;
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free(tempnam);
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return(retval);
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}
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/*ARGSUSED*/
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char *
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Getstr(const char *id, char **cpp __unused)
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{
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int retval;
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char *answer, *tempid;
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tempid = strdup(id);
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retval = cgetstr(area, tempid, &answer);
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free(tempid);
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return((retval > 0) ? answer : NULL);
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}
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#else
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/* On GNO, use code for this taken from GNO's getty. */
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/*
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* Copyright (c) 1983 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef __GNO__
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#ifndef lint
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static char sccsid[] = "@(#)gettytab.c 5.5 (Berkeley) 2/25/91";
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#endif /* not lint */
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#endif
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <paths.h>
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#ifndef _PATH_GETTYTAB
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#define _PATH_GETTYTAB "/etc/gettytab"
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#endif
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#define TABBUFSIZ 512
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static char *tbuf;
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int hopcount; /* detect infinite loops in termcap, init 0 */
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int nchktc(void);
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int namatch(char *np);
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static char * skip (register char *bp);
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static char * decode (register char *str, char **area);
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/*
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* Get an entry for terminal name in buffer bp,
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* from the termcap file. Parse is very rudimentary;
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* we just notice escaped newlines.
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*/
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int
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getent(char *bp, char *name)
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{
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register char *cp;
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register int c;
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register int i = 0, cnt = 0;
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static char ibuf[TABBUFSIZ];
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char *cp2;
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int tf;
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tbuf = bp;
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tf = open(_PATH_GETTYTAB, O_RDONLY);
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if (tf < 0)
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return (-1);
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for (;;) {
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cp = bp;
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for (;;) {
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if (i == cnt) {
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cnt = read(tf, ibuf, TABBUFSIZ);
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if (cnt <= 0) {
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close(tf);
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return (0);
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}
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i = 0;
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}
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c = ibuf[i++];
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if (c == '\n' || c == '\r') {
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if (cp > bp && cp[-1] == '\\'){
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cp--;
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continue;
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}
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break;
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}
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if (cp >= bp+TABBUFSIZ) {
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write(STDERR_FILENO,"Gettytab entry too long\n", 24);
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break;
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} else
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*cp++ = c;
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}
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*cp = 0;
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/*
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* The real work for the match.
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*/
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if (namatch(name)) {
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close(tf);
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return(nchktc());
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}
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}
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}
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/*
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* tnchktc: check the last entry, see if it's tc=xxx. If so,
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* recursively find xxx and append that entry (minus the names)
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* to take the place of the tc=xxx entry. This allows termcap
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* entries to say "like an HP2621 but doesn't turn on the labels".
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* Note that this works because of the left to right scan.
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*/
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#define MAXHOP 32
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int
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nchktc(void)
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{
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register char *p, *q;
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char tcname[16]; /* name of similar terminal */
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char *tcbuf;
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/*char tcbuf[TABBUFSIZ];*/
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char *holdtbuf = tbuf;
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int l;
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tcbuf = malloc(TABBUFSIZ);
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p = tbuf + strlen(tbuf) - 2; /* before the last colon */
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while (*--p != ':')
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if (p<tbuf) {
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write(STDERR_FILENO, "Bad gettytab entry\n", 19);
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free(tcbuf);
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return (0);
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}
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p++;
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/* p now points to beginning of last field */
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if (p[0] != 't' || p[1] != 'c') {
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free(tcbuf);
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return(1);
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}
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strcpy(tcname,p+3);
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q = tcname;
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while (q && *q != ':')
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q++;
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*q = 0;
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if (++hopcount > MAXHOP) {
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write(STDERR_FILENO, "Getty: infinite tc= loop\n", 25);
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free(tcbuf);
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return (0);
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}
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if (getent(tcbuf, tcname) != 1) {
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free(tcbuf);
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return(0);
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}
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for (q=tcbuf; *q != ':'; q++)
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;
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l = p - holdtbuf + strlen(q);
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if (l > TABBUFSIZ) {
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write(STDERR_FILENO, "Gettytab entry too long\n", 24);
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q[TABBUFSIZ - (p-tbuf)] = 0;
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}
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strcpy(p, q+1);
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tbuf = holdtbuf;
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free(tcbuf);
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return(1);
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}
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/*
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* Tnamatch deals with name matching. The first field of the termcap
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* entry is a sequence of names separated by |'s, so we compare
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* against each such name. The normal : terminator after the last
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* name (before the first field) stops us.
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*/
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int
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namatch(char *np)
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{
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register char *Np, *Bp;
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Bp = tbuf;
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if (*Bp == '#')
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return(0);
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for (;;) {
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for (Np = np; *Np && *Bp == *Np; Bp++, Np++)
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continue;
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if (*Np == 0 && (*Bp == '|' || *Bp == ':' || *Bp == 0))
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return (1);
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while (*Bp && *Bp != ':' && *Bp != '|')
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Bp++;
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if (*Bp == 0 || *Bp == ':')
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return (0);
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Bp++;
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}
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}
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/*
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* Skip to the next field. Notice that this is very dumb, not
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* knowing about \: escapes or any such. If necessary, :'s can be put
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* into the termcap file in octal.
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*/
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static char *
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skip(register char *bp)
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{
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while (*bp && *bp != ':')
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bp++;
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if (*bp == ':')
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bp++;
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return (bp);
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}
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/*
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* Return the (numeric) option id.
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* Numeric options look like
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* li#80
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* i.e. the option string is separated from the numeric value by
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* a # character. If the option is not found we return -1.
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* Note that we handle octal numbers beginning with 0.
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*/
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long
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getnum(char *id)
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{
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register long i, base;
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register char *bp = tbuf;
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for (;;) {
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bp = skip(bp);
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if (*bp == 0)
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return (-1);
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if (*bp++ != id[0] || *bp == 0 || *bp++ != id[1])
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continue;
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if (*bp == '@')
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return(-1);
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if (*bp != '#')
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continue;
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bp++;
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base = 10;
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if (*bp == '0')
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base = 8;
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i = 0;
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while (isdigit(*bp))
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i *= base, i += *bp++ - '0';
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return (i);
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}
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}
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/*
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* Handle a flag option.
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* Flag options are given "naked", i.e. followed by a : or the end
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* of the buffer. Return 1 if we find the option, or 0 if it is
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* not given.
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*/
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int
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getflag (char *id)
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{
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register char *bp = tbuf;
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for (;;) {
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bp = skip(bp);
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if (!*bp)
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return (-1);
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if (*bp++ == id[0] && *bp != 0 && *bp++ == id[1]) {
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if (!*bp || *bp == ':')
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return (1);
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else if (*bp == '!')
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return (0);
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else if (*bp == '@')
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return(-1);
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}
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}
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}
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/*
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* Get a string valued option.
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* These are given as
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* cl=^Z
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* Much decoding is done on the strings, and the strings are
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* placed in area, which is a ref parameter which is updated.
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* No checking on area overflow.
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*/
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char *
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Getstr(char *id, char **area)
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{
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register char *bp = tbuf;
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for (;;) {
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bp = skip(bp);
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if (!*bp)
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return (0);
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if (*bp++ != id[0] || *bp == 0 || *bp++ != id[1])
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continue;
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if (*bp == '@')
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return(0);
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if (*bp != '=')
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continue;
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bp++;
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return (decode(bp, area));
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}
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}
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/*
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* Tdecode does the grung work to decode the
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* string capability escapes.
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*/
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static char *
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decode(register char *str, char **area)
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{
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register char *cp;
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register int c;
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register char *dp;
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int i;
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cp = *area;
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while ((c = *str++) && c != ':') {
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switch (c) {
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case '^':
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c = *str++ & 037;
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break;
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case '\\':
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dp = "E\033^^\\\\::n\nr\rt\tb\bf\f";
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c = *str++;
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nextc:
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if (*dp++ == c) {
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c = *dp++;
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break;
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}
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dp++;
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if (*dp)
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goto nextc;
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if (isdigit(c)) {
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c -= '0', i = 2;
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do
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c <<= 3, c |= *str++ - '0';
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while (--i && isdigit(*str));
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}
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break;
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}
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*cp++ = c;
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}
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*cp++ = 0;
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str = *area;
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*area = cp;
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return (str);
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}
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#endif |