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/* $OpenBSD: read_bsd_terminfo.c,v 1.14 2003/06/17 21:56:24 millert Exp $ */
/*
* Copyright (c) 1998, 1999, 2000 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef lint
static const char rcsid[] = "$OpenBSD: read_bsd_terminfo.c,v 1.14 2003/06/17 21:56:24 millert Exp $";
#endif
#include <curses.priv.h>
#include <tic.h>
#include <term.h> /* lines, columns, cur_term */
#include <term_entry.h>
#define _PATH_TERMINFO "/usr/share/misc/terminfo"
/* Function prototypes for private functions, */
static int _nc_lookup_bsd_terminfo_entry(const char *const, const char *const, TERMTYPE *);
/*
* Look up ``tn'' in the BSD terminfo.db file and fill in ``tp''
* with the info we find there.
* Returns 1 on success, 0 on failure.
*/
int
_nc_read_bsd_terminfo_entry(tn, filename, tp)
const char *const tn;
char *const filename;
TERMTYPE *const tp;
{
char **fname, *p;
char envterm[PATH_MAX]; /* local copy of $TERMINFO */
char hometerm[PATH_MAX]; /* local copy of $HOME/.terminfo */
char *pathvec[4]; /* list of possible terminfo files */
size_t len;
fname = pathvec;
/* $TERMINFO may hold a path to a terminfo file */
if (use_terminfo_vars() && (p = getenv("TERMINFO")) != NULL) {
len = strlcpy(envterm, p, sizeof(envterm));
if (len < sizeof(envterm))
*fname++ = envterm;
}
/* Also check $HOME/.terminfo if it exists */
if (use_terminfo_vars() && (p = getenv("HOME")) != NULL && *p != '\0') {
len = snprintf(hometerm, sizeof(hometerm), "%s/.terminfo", p);
if (len > 0 && len < sizeof(hometerm))
*fname++ = hometerm;
}
/* Finally we check the system terminfo file */
*fname++ = _PATH_TERMINFO;
*fname = NULL;
/*
* Lookup ``tn'' in each possible terminfo file until
* we find it or reach the end.
*/
for (fname = pathvec; *fname; fname++) {
if (_nc_lookup_bsd_terminfo_entry(tn, *fname, tp) == 1) {
/* Set copyout parameter and return */
(void)strlcpy(filename, *fname, PATH_MAX);
return (1);
}
}
return (0);
}
/*
* Given a path /path/to/terminfo/X/termname, look up termname
* /path/to/terminfo.db and fill in ``tp'' with the info we find there.
* Returns 1 on success, 0 on failure.
*/
int
_nc_read_bsd_terminfo_file(filename, tp)
const char *const filename;
TERMTYPE *const tp;
{
char path[PATH_MAX]; /* path to terminfo.db */
char *tname; /* name of terminal to look up */
char *p;
(void)strlcpy(path, filename, sizeof(path));
/* Split filename into path and term name components. */
if ((tname = strrchr(path, '/')) == NULL)
return (0);
*tname++ = '\0';
if ((p = strrchr(path, '/')) == NULL)
return (0);
*p = '\0';
return (_nc_lookup_bsd_terminfo_entry(tname, path, tp));
}
/*
* Look up ``tn'' in the BSD terminfo file ``filename'' and fill in
* ``tp'' with the info we find there.
* Returns 1 on success, 0 on failure.
*/
static int
_nc_lookup_bsd_terminfo_entry(tn, filename, tp)
const char *const tn;
const char *const filename;
TERMTYPE *const tp;
{
char *pathvec[2];
char *capbuf, *cptr, *infobuf, *iptr, lastc;
int error;
size_t len;
pathvec[0] = (char *)filename;
pathvec[1] = NULL;
capbuf = NULL;
infobuf = NULL;
_nc_set_source(filename); /* For useful error messages */
/* Don't prepend any hardcoded entries. */
(void) cgetset(NULL);
/* Lookup tn in 'filename' */
error = cgetent(&capbuf, pathvec, (char *)tn);
if (error == 0) {
/*
* To make the terminfo parser happy we need to, as a minimum,
* 1) convert ':' separators to ','
* 2) add a newline after the name field
* 3) add a newline at the end of the entry
*/
/* Add space for 2 extra newlines and the final NUL */
infobuf = malloc(strlen(capbuf) + 3);
if (infobuf == NULL) {
error = TRUE;
goto done;
}
/* Copy name and aliases, adding a newline. */
cptr = strchr(capbuf, ':');
if (cptr == NULL) {
error = TRUE;
goto done;
}
len = cptr - capbuf;
memcpy(infobuf, capbuf, len);
iptr = infobuf + len;
*iptr++ = ',';
*iptr++ = '\n';
/* Copy the rest of capbuf, converting ':' -> ',' */
for (++cptr, lastc = '\0'; *cptr; cptr++) {
/* XXX - somewhat simplistic */
if (*cptr == ':' && lastc != '\\')
*iptr++ = ',';
else
*iptr++ = *cptr;
lastc = *cptr;
}
*iptr++ = '\n';
*iptr = '\0';
/*
* Parse the terminfo entry; sets _nc_head as a side effect.
* (_nc_head is actually a linked list but since we only parse
* a single entry we know there is only one entry in the list).
*/
_nc_read_entry_source(NULL, infobuf, FALSE, FALSE, NULLHOOK);
if (_nc_head == 0) {
error = TRUE;
goto done;
}
/*
* Save term entry and prevent _nc_free_entries() from freeing
* up the string table (since we use it in tp).
*/
*tp = _nc_head->tterm;
_nc_head->tterm.str_table = NULL;
_nc_free_entries(_nc_head);
}
done:
if (capbuf)
free(capbuf);
if (infobuf)
free(infobuf);
cgetclose();
return ((error == 0));
}
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