2 * $Id: printcap.c,v 1.9 2003-02-17 01:33:01 srittau Exp $
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41 #endif /* HAVE_CONFIG_H */
48 #endif /* HAVE_UNISTD_H */
49 #include <sys/types.h>
53 #endif /* HAVE_FCNTL_H */
54 #include <atalk/paths.h>
61 #define MAXHOP 32 /* max number of tc= indirections */
64 * termcap - routines for dealing with the terminal capability data base
66 * BUG: Should use a "last" pointer in tbuf, so that searching
67 * for capabilities alphabetically would not be a n**2/2
68 * process when large numbers of capabilities are given.
69 * Note: If we add a last pointer now we will screw up the
70 * tc capability. We really should compile termcap.
72 * Essentially all the work here is scanning and decoding escapes
73 * in string capabilities. We don't use stdio because the editor
74 * doesn't, and because living w/o it is not hard.
80 #define tgetent pgetent
82 #define tgetstr pgetstr
83 #define tdecode pdecode
84 #define tgetnum pgetnum
85 #define tgetflag pgetflag
86 #define tdecode pdecode
87 #define tnchktc pnchktc
88 #define tnamatch pnamatch
92 static FILE *pfp = NULL; /* printcap data base file pointer */
94 static int hopcount; /* detect infinite loops in termcap, init 0 */
97 static char *tdecode();
101 * Similar to tgetent except it returns the next entry instead of
104 * Added a "cap" parameter, so we can use these calls for printcap
107 int getprent( cap, bp, bufsize )
110 register int bufsize;
112 register int c, skip = 0, i;
114 if (pfp == NULL && (pfp = fopen( cap, "r")) == NULL)
119 switch (c = getc(pfp)) {
129 if (bp[-1] == '\\') {
141 if (bp >= tbuf+BUFSIZ) {
142 write(2, "Termcap entry too long\n", 23);
147 if (++i >= bufsize) {
148 write(2, "config file too large\n", 22);
165 * Get an entry for terminal name in buffer bp,
166 * from the termcap file. Parse is very rudimentary;
167 * we just notice escaped newlines.
169 * Added a "cap" parameter, so we can use these calls for printcap
172 int tgetent( cap, bp, name)
173 char *cap, *bp, *name;
177 register int i = 0, cnt = 0;
186 cp = getenv("TERMCAP");
188 * TERMCAP can have one of two things in it. It can be the
189 * name of a file to use instead of /etc/termcap. In this
190 * case it better start with a "/". Or it can be an entry to
191 * use so we don't have to read the file. In this case it
192 * has to already have the newlines crunched out.
196 cp2 = getenv("TERM");
197 if (cp2==(char *) 0 || strcmp(name,cp2)==0) {
199 return(tnchktc(cap));
218 cnt = read(tf, ibuf, BUFSIZ);
227 if (!skip && cp > bp && cp[-1] == '\\') {
237 if (c == '#' && cp == bp)
241 if (cp >= bp+BUFSIZ) {
242 write(2,"Termcap entry too long\n", 23);
250 * The real work for the match.
252 if (tnamatch(name)) {
254 return(tnchktc(cap));
260 * tnchktc: check the last entry, see if it's tc=xxx. If so,
261 * recursively find xxx and append that entry (minus the names)
262 * to take the place of the tc=xxx entry. This allows termcap
263 * entries to say "like an HP2621 but doesn't turn on the labels".
264 * Note that this works because of the left to right scan.
266 * Added a "cap" parameter, so we can use these calls for printcap
272 register char *p, *q;
273 char tcname[16]; /* name of similar terminal */
275 char *holdtbuf = tbuf;
278 p = tbuf + strlen(tbuf) - 2; /* before the last colon */
281 write(2, "Bad termcap entry\n", 18);
285 /* p now points to beginning of last field */
286 if (p[0] != 't' || p[1] != 'c')
290 while (q && *q != ':')
293 if (++hopcount > MAXHOP) {
294 write(2, "Infinite tc= loop\n", 18);
297 if (tgetent( cap, tcbuf, tcname) != 1)
299 for (q=tcbuf; *q != ':'; q++)
301 l = p - holdtbuf + strlen(q);
303 write(2, "Termcap entry too long\n", 23);
304 q[BUFSIZ - (p-tbuf)] = 0;
312 * Tnamatch deals with name matching. The first field of the termcap
313 * entry is a sequence of names separated by |'s, so we compare
314 * against each such name. The normal : terminator after the last
315 * name (before the first field) stops us.
320 register char *Np, *Bp;
326 for (Np = np; *Np && *Bp == *Np; Bp++, Np++)
328 if (*Np == 0 && (*Bp == '|' || *Bp == ':' || *Bp == 0))
330 while (*Bp && *Bp != ':' && *Bp != '|')
332 if (*Bp == 0 || *Bp == ':')
339 * Skip to the next field. Notice that this is very dumb, not
340 * knowing about \: escapes or any such. If necessary, :'s can be put
341 * into the termcap file in octal.
348 while (*bp && *bp != ':')
356 * Return the (numeric) option id.
357 * Numeric options look like
359 * i.e. the option string is separated from the numeric value by
360 * a # character. If the option is not found we return -1.
361 * Note that we handle octal numbers beginning with 0.
366 register int i, base;
367 register char *bp = tbuf;
373 if (*bp++ != id[0] || *bp == 0 || *bp++ != id[1])
385 i *= base, i += *bp++ - '0';
391 * Handle a flag option.
392 * Flag options are given "naked", i.e. followed by a : or the end
393 * of the buffer. Return 1 if we find the option, or 0 if it is
399 register char *bp = tbuf;
405 if (*bp++ == id[0] && *bp != 0 && *bp++ == id[1]) {
406 if (!*bp || *bp == ':')
415 * Get a string valued option.
418 * Much decoding is done on the strings, and the strings are
419 * placed in area, which is a ref parameter which is updated.
420 * No checking on area overflow.
426 register char *bp = tbuf;
432 if (*bp++ != id[0] || *bp == 0 || *bp++ != id[1])
439 return (tdecode(bp, area));
444 * Tdecode does the grung work to decode the
445 * string capability escapes.
458 while ((c = *str++) && c != ':') {
466 dp = "E\033^^\\\\::n\nr\rt\tb\bf\f";
479 c <<= 3, c |= *str++ - '0';
480 while (--i && isdigit(*str));
493 decodename(str, area, bufsize)
504 while ((c = *str++) && --bufsize && c != ':' && c != '|' ) {
512 dp = "E\033^^\\\\::n\nr\rt\tb\bf\f";
525 c <<= 3, c |= *str++ - '0';
526 while (--i && isdigit(*str));
539 getpname( area, bufsize )
543 return( decodename( tbuf, area, bufsize));