2 /* $KAME: advcap.c,v 1.11 2003/05/19 09:46:50 keiichi Exp $ */
5 * Copyright (c) 1983 The Regents of the University of California.
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34 * remcap - routines for dealing with the remote host data base
36 * derived from termcap
38 #include <sys/types.h>
48 #include "pathnames.h"
53 #define MAXHOP 32 /* max number of tc= indirections */
55 #define tgetent agetent
56 #define tnchktc anchktc
57 #define tnamatch anamatch
58 #define tgetnum agetnum
59 #define tgetflag agetflag
60 #define tgetstr agetstr
63 #define V_TERMCAP "REMOTE"
70 * termcap - routines for dealing with the terminal capability data base
72 * BUG: Should use a "last" pointer in tbuf, so that searching
73 * for capabilities alphabetically would not be a n**2/2
74 * process when large numbers of capabilities are given.
75 * Note: If we add a last pointer now we will screw up the
76 * tc capability. We really should compile termcap.
78 * Essentially all the work here is scanning and decoding escapes
79 * in string capabilities. We don't use stdio because the editor
80 * doesn't, and because living w/o it is not hard.
84 static int hopcount; /* detect infinite loops in termcap, init 0 */
86 static char *remotefile;
88 extern char *conffile;
90 int tgetent(char *, char *);
91 int getent(char *, char *, char *);
94 static char *tskip(char *);
95 int64_t tgetnum(char *);
97 char *tgetstr(char *, char **);
98 static char *tdecode(char *, char **);
101 * Get an entry for terminal name in buffer bp,
102 * from the termcap file. Parse is very rudimentary;
103 * we just notice escaped newlines.
111 remotefile = cp = conffile ? conffile : _PATH_RTADVDCONF;
112 return (getent(bp, name, cp));
117 char *bp, *name, *cp;
127 * TERMCAP can have one of two things in it. It can be the
128 * name of a file to use instead of /etc/termcap. In this
129 * case it better start with a "/". Or it can be an entry to
130 * use so we don't have to read the file. In this case it
131 * has to already have the newlines crunched out.
134 tf = open(RM = cp, O_RDONLY);
138 "<%s> open: %s", __func__, strerror(errno));
145 cnt = read(tf, ibuf, BUFSIZ);
154 if (cp > bp && cp[-1] == '\\') {
160 if (cp >= bp + BUFSIZ) {
161 write(STDERR_FILENO, "Remcap entry too long\n",
170 * The real work for the match.
172 if (tnamatch(name)) {
180 * tnchktc: check the last entry, see if it's tc=xxx. If so,
181 * recursively find xxx and append that entry (minus the names)
182 * to take the place of the tc=xxx entry. This allows termcap
183 * entries to say "like an HP2621 but doesn't turn on the labels".
184 * Note that this works because of the left to right scan.
190 char tcname[16]; /* name of similar terminal */
192 char *holdtbuf = tbuf;
195 p = tbuf + strlen(tbuf) - 2; /* before the last colon */
198 write(STDERR_FILENO, "Bad remcap entry\n", 18);
202 /* p now points to beginning of last field */
203 if (p[0] != 't' || p[1] != 'c')
205 strlcpy(tcname, p + 3, sizeof tcname);
207 while (*q && *q != ':')
210 if (++hopcount > MAXHOP) {
211 write(STDERR_FILENO, "Infinite tc= loop\n", 18);
214 if (getent(tcbuf, tcname, remotefile) != 1) {
217 for (q = tcbuf; *q++ != ':'; )
219 l = p - holdtbuf + strlen(q);
221 write(STDERR_FILENO, "Remcap entry too long\n", 23);
222 q[BUFSIZ - (p-holdtbuf)] = 0;
230 * Tnamatch deals with name matching. The first field of the termcap
231 * entry is a sequence of names separated by |'s, so we compare
232 * against each such name. The normal : terminator after the last
233 * name (before the first field) stops us.
245 for (Np = np; *Np && *Bp == *Np; Bp++, Np++)
247 if (*Np == 0 && (*Bp == '|' || *Bp == ':' || *Bp == 0))
249 while (*Bp && *Bp != ':' && *Bp != '|')
251 if (*Bp == 0 || *Bp == ':')
258 * Skip to the next field. Notice that this is very dumb, not
259 * knowing about \: escapes or any such. If necessary, :'s can be put
260 * into the termcap file in octal.
280 while (isdigit(*bp++))
285 dquote = (dquote ? 1 : 0);
300 * Return the (numeric) option id.
301 * Numeric options look like
303 * i.e. the option string is separated from the numeric value by
304 * a # character. If the option is not found we return -1.
305 * Note that we handle octal numbers beginning with 0.
319 if (strncmp(bp, id, strlen(id)) != 0)
332 i *= base, i += *bp++ - '0';
338 * Handle a flag option.
339 * Flag options are given "naked", i.e. followed by a : or the end
340 * of the buffer. Return 1 if we find the option, or 0 if it is
353 if (strncmp(bp, id, strlen(id)) == 0) {
355 if (!*bp || *bp == ':')
364 * Get a string valued option.
367 * Much decoding is done on the strings, and the strings are
368 * placed in area, which is a ref parameter which is updated.
369 * No checking on area overflow.
381 if (strncmp(bp, id, strlen(id)) != 0)
389 return (tdecode(bp, area));
394 * Tdecode does the grung work to decode the
395 * string capability escapes.
415 while ((c = *str++) && c != term) {
423 dp = "E\033^^\\\\::n\nr\rt\tb\bf\f\"\"";
436 c <<= 3, c |= *str++ - '0';
437 while (--i && isdigit(*str));
443 if (c == term && term != ':') {