/*-
* Copyright (c) 1991, 1993
* The 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. 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.
*/
/*
* Figure out what kind of terminal we're dealing with, and then read in
* its termcap entry.
*/
const char *
get_terminfo_entry(const char *userarg)
{
struct ttyent *t;
int rval;
char *p, *ttypath;
const char *ttype;
if (userarg) {
ttype = userarg;
goto found;
}
/* Try the environment. */
if ((ttype = getenv("TERM")) != NULL)
goto map;
/* Try ttyname(3); check for dialup or other mapping. */
if ((ttypath = ttyname(STDERR_FILENO)) != NULL) {
if ((p = strrchr(ttypath, '/')) != NULL)
++p;
else
p = ttypath;
if ((t = getttynam(p))) {
ttype = t->ty_type;
goto map;
}
}
/* If still undefined, use "unknown". */
ttype = "unknown";
map: ttype = mapped(ttype);
found:
/*
* ttype now contains a pointer to the type of the terminal.
* If the first character is '?', ask the user.
*/
if (ttype[0] == '?') {
if (ttype[1] != '\0')
ttype = askuser(ttype + 1);
else
ttype = askuser(NULL);
}
while (setupterm(ttype, 0, &rval) == ERR) {
switch (rval) {
case 1:
warnx("terminal type %s is hardcopy", ttype);
break;
case 0:
warnx("terminal type %s is unknown", ttype);
break;
default:
if (!errno)
errno = ENOENT;
err(1, NULL);
}
ttype = askuser(NULL);
}
return (ttype);
}
/* Prompt the user for a terminal type. */
static const char *
askuser(const char *dflt)
{
static char answer[256];
char *p;
/* We can get recalled; if so, don't continue uselessly. */
if (feof(stdin) || ferror(stdin)) {
(void)fprintf(stderr, "\n");
exit(1);
}
for (;;) {
if (dflt)
(void)fprintf(stderr, "Terminal type? [%s] ", dflt);
else
(void)fprintf(stderr, "Terminal type? ");
(void)fflush(stderr);
if (fgets(answer, sizeof(answer), stdin) == NULL) {
if (dflt == NULL) {
(void)fprintf(stderr, "\n");
exit(1);
}
return (dflt);
}
if ((p = strchr(answer, '\n')) != NULL)
*p = '\0';
if (answer[0])
return (answer);
if (dflt != NULL)
return (dflt);
}
}
