+++ /dev/null
-/*
- * $Id: printcap.c,v 1.12 2009-10-14 02:24:05 didg Exp $
- *
- * Copyright (c) 1990,1994 Regents of The University of Michigan.
- * All Rights Reserved. See COPYRIGHT.
- *
- * Copyright (c) 1983 Regents of the University of California.
- * All rights reserved.
- *
- * 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * 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.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif /* HAVE_CONFIG_H */
-
-#include <ctype.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-#include <sys/types.h>
-#include <sys/stat.h>
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif /* HAVE_FCNTL_H */
-#include <atalk/paths.h>
-
-#include "printcap.h"
-
-#ifndef BUFSIZ
-#define BUFSIZ 1024
-#endif /* ! BUFSIZ */
-#define MAXHOP 32 /* max number of tc= indirections */
-
-/*
- * termcap - routines for dealing with the terminal capability data base
- *
- * BUG: Should use a "last" pointer in tbuf, so that searching
- * for capabilities alphabetically would not be a n**2/2
- * process when large numbers of capabilities are given.
- * Note: If we add a last pointer now we will screw up the
- * tc capability. We really should compile termcap.
- *
- * Essentially all the work here is scanning and decoding escapes
- * in string capabilities. We don't use stdio because the editor
- * doesn't, and because living w/o it is not hard.
- */
-
-#define PRINTCAP
-
-#ifdef PRINTCAP
-#define tgetent pgetent
-#define tskip pskip
-#define tgetstr pgetstr
-#define tdecode pdecode
-#define tgetnum pgetnum
-#define tgetflag pgetflag
-#define tdecode pdecode
-#define tnchktc pnchktc
-#define tnamatch pnamatch
-#define V6
-#endif /* PRINTCAP */
-
-static FILE *pfp = NULL; /* printcap data base file pointer */
-static char *tbuf;
-static int hopcount; /* detect infinite loops in termcap, init 0 */
-
-/*
- * Similar to tgetent except it returns the next entry instead of
- * doing a lookup.
- *
- * Added a "cap" parameter, so we can use these calls for printcap
- * and papd.conf.
- */
-int getprent( char *cap, char *bp, int bufsize)
-{
- register int c, skip = 0, i;
-
- if (pfp == NULL && (pfp = fopen( cap, "r")) == NULL)
- return(-1);
- tbuf = bp;
- i = 0;
- for (;;) {
- switch (c = getc(pfp)) {
- case EOF:
- if (bp != tbuf) {
- *bp = '\0';
- return(1);
- }
- fclose(pfp);
- pfp = NULL;
- return(0);
- case '\n':
- if (bp == tbuf) {
- skip = 0;
- continue;
- }
- if (bp[-1] == '\\') {
- bp--;
- continue;
- }
- *bp = '\0';
- return(1);
- case '#':
- if (bp == tbuf)
- skip++;
- default:
- if (skip)
- continue;
- if (bp >= tbuf+BUFSIZ) {
- write(2, "Termcap entry too long\n", 23);
- *bp = '\0';
- return(1);
- }
- *bp++ = c;
- if (++i >= bufsize) {
- write(2, "config file too large\n", 22);
- fclose(pfp);
- pfp = NULL;
- *bp = '\0';
- return(1);
- }
- }
- }
-}
-
-void endprent(void)
-{
- if (pfp != NULL)
- fclose(pfp);
-}
-
-/*
- * Get an entry for terminal name in buffer bp,
- * from the termcap file. Parse is very rudimentary;
- * we just notice escaped newlines.
- *
- * Added a "cap" parameter, so we can use these calls for printcap
- * and papd.conf.
- */
-int tgetent(char *cap, char *bp, char *name)
-{
- register char *cp;
- register int c;
- register int i = 0, cnt = 0;
- char ibuf[BUFSIZ];
- int tf;
- int skip;
-
- hopcount = 0;
- tbuf = bp;
- tf = 0;
-#ifndef V6
- cp = getenv("TERMCAP");
- /*
- * TERMCAP can have one of two things in it. It can be the
- * name of a file to use instead of /etc/termcap. In this
- * case it better start with a "/". Or it can be an entry to
- * use so we don't have to read the file. In this case it
- * has to already have the newlines crunched out.
- */
- if (cp && *cp) {
- if (*cp!='/') {
- cp2 = getenv("TERM");
- if (cp2==(char *) 0 || strcmp(name,cp2)==0) {
- strcpy(bp,cp);
- return(tnchktc(cap));
- } else {
- tf = open(cap, 0);
- }
- } else
- tf = open(cp, 0);
- }
- if (tf==0)
- tf = open(cap, 0);
-#else /* V6 */
- tf = open(cap, 0);
-#endif /* V6 */
- if (tf < 0)
- return (-1);
- for (;;) {
- cp = bp;
- skip = 0;
- for (;;) {
- if (i == cnt) {
- cnt = read(tf, ibuf, BUFSIZ);
- if (cnt <= 0) {
- close(tf);
- return (0);
- }
- i = 0;
- }
- c = ibuf[i++];
- if (c == '\n') {
- if (!skip && cp > bp && cp[-1] == '\\') {
- cp--;
- continue;
- }
- skip = 0;
- if (cp == bp)
- continue;
- else
- break;
- }
- if (c == '#' && cp == bp)
- skip++;
- if (skip)
- continue;
- if (cp >= bp+BUFSIZ) {
- write(2,"Termcap entry too long\n", 23);
- break;
- } else
- *cp++ = c;
- }
- *cp = 0;
-
- /*
- * The real work for the match.
- */
- if (tnamatch(name)) {
- close(tf);
- return(tnchktc(cap));
- }
- }
-}
-
-/*
- * tnchktc: check the last entry, see if it's tc=xxx. If so,
- * recursively find xxx and append that entry (minus the names)
- * to take the place of the tc=xxx entry. This allows termcap
- * entries to say "like an HP2621 but doesn't turn on the labels".
- * Note that this works because of the left to right scan.
- *
- * Added a "cap" parameter, so we can use these calls for printcap
- * and papd.conf.
- */
-int tnchktc( char *cap)
-{
- register char *p, *q;
- char tcname[16]; /* name of similar terminal */
- char tcbuf[BUFSIZ];
- char *holdtbuf = tbuf;
- int l;
-
- p = tbuf + strlen(tbuf) - 2; /* before the last colon */
- while (*--p != ':')
- if (p<tbuf) {
- write(2, "Bad termcap entry\n", 18);
- return (0);
- }
- p++;
- /* p now points to beginning of last field */
- if (p[0] != 't' || p[1] != 'c')
- return(1);
- strcpy(tcname,p+3);
- q = tcname;
- while (q && *q != ':')
- q++;
- *q = 0;
- if (++hopcount > MAXHOP) {
- write(2, "Infinite tc= loop\n", 18);
- return (0);
- }
- if (tgetent( cap, tcbuf, tcname) != 1)
- return(0);
- for (q=tcbuf; *q != ':'; q++)
- ;
- l = p - holdtbuf + strlen(q);
- if (l > BUFSIZ) {
- write(2, "Termcap entry too long\n", 23);
- q[BUFSIZ - (p-tbuf)] = 0;
- }
- strcpy(p, q+1);
- tbuf = holdtbuf;
- return(1);
-}
-
-/*
- * Tnamatch deals with name matching. The first field of the termcap
- * entry is a sequence of names separated by |'s, so we compare
- * against each such name. The normal : terminator after the last
- * name (before the first field) stops us.
- */
-int tnamatch(char *np)
-{
- register char *Np, *Bp;
-
- Bp = tbuf;
- if (*Bp == '#')
- return(0);
- for (;;) {
- for (Np = np; *Np && *Bp == *Np; Bp++, Np++)
- continue;
- if (*Np == 0 && (*Bp == '|' || *Bp == ':' || *Bp == 0))
- return (1);
- while (*Bp && *Bp != ':' && *Bp != '|')
- Bp++;
- if (*Bp == 0 || *Bp == ':')
- return (0);
- Bp++;
- }
-}
-
-/*
- * Skip to the next field. Notice that this is very dumb, not
- * knowing about \: escapes or any such. If necessary, :'s can be put
- * into the termcap file in octal.
- */
-static char *tskip(char *bp)
-{
-
- while (*bp && *bp != ':')
- bp++;
- while (*bp && *bp == ':')
- bp++;
- return (bp);
-}
-
-/*
- * Return the (numeric) option id.
- * Numeric options look like
- * li#80
- * i.e. the option string is separated from the numeric value by
- * a # character. If the option is not found we return -1.
- * Note that we handle octal numbers beginning with 0.
- */
-int tgetnum(char *id)
-{
- register int i, base;
- register char *bp = tbuf;
-
- for (;;) {
- bp = tskip(bp);
- if (*bp == 0)
- return (-1);
- if (*bp++ != id[0] || *bp == 0 || *bp++ != id[1])
- continue;
- if (*bp == '@')
- return(-1);
- if (*bp != '#')
- continue;
- bp++;
- base = 10;
- if (*bp == '0')
- base = 8;
- i = 0;
- while (isdigit(*bp))
- i *= base, i += *bp++ - '0';
- return (i);
- }
-}
-
-/*
- * Handle a flag option.
- * Flag options are given "naked", i.e. followed by a : or the end
- * of the buffer. Return 1 if we find the option, or 0 if it is
- * not given.
- */
-int tgetflag(char *id)
-{
- register char *bp = tbuf;
-
- for (;;) {
- bp = tskip(bp);
- if (!*bp)
- return (0);
- if (*bp++ == id[0] && *bp != 0 && *bp++ == id[1]) {
- if (!*bp || *bp == ':')
- return (1);
- else if (*bp == '@')
- return(0);
- }
- }
-}
-
-/*
- * Tdecode does the grung work to decode the
- * string capability escapes.
- */
-static char *
-tdecode(char *str, char **area)
-{
- register char *cp;
- register int c;
- register char *dp;
- int i;
-
- cp = *area;
- while ((c = *str++) && c != ':') {
- switch (c) {
-
- case '^':
- c = *str++ & 037;
- break;
-
- case '\\':
- dp = "E\033^^\\\\::n\nr\rt\tb\bf\f";
- c = *str++;
-nextc:
- if (*dp++ == c) {
- c = *dp++;
- break;
- }
- dp++;
- if (*dp)
- goto nextc;
- if (isdigit(c)) {
- c -= '0', i = 2;
- do
- c <<= 3, c |= *str++ - '0';
- while (--i && isdigit(*str));
- }
- break;
- }
- *cp++ = c;
- }
- *cp++ = 0;
- str = *area;
- *area = cp;
- return (str);
-}
-
-/*
- * Get a string valued option.
- * These are given as
- * cl=^Z
- * Much decoding is done on the strings, and the strings are
- * placed in area, which is a ref parameter which is updated.
- * No checking on area overflow.
- */
-char *
-tgetstr(char *id, char **area)
-{
- register char *bp = tbuf;
-
- for (;;) {
- bp = tskip(bp);
- if (!*bp)
- return (NULL);
- if (*bp++ != id[0] || *bp == 0 || *bp++ != id[1])
- continue;
- if (*bp == '@')
- return(NULL);
- if (*bp != '=')
- continue;
- bp++;
- return (tdecode(bp, area));
- }
-}
-
-static char *
-decodename(char *str, char **area, int bufsize)
-{
- register char *cp;
- register int c;
- register char *dp;
- int i;
-
- cp = *area;
- while ((c = *str++) && --bufsize && c != ':' && c != '|' ) {
- switch (c) {
-
- case '^':
- c = *str++ & 037;
- break;
-
- case '\\':
- dp = "E\033^^\\\\::n\nr\rt\tb\bf\f";
- c = *str++;
-nextc:
- if (*dp++ == c) {
- c = *dp++;
- break;
- }
- dp++;
- if (*dp)
- goto nextc;
- if (isdigit(c)) {
- c -= '0', i = 2;
- do
- c <<= 3, c |= *str++ - '0';
- while (--i && isdigit(*str));
- }
- break;
- }
- *cp++ = c;
- }
- *cp++ = 0;
- str = *area;
- *area = cp;
- return (str);
-}
-
-char *
-getpname(char **area, int bufsize)
-{
- return( decodename( tbuf, area, bufsize));
-}
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