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contrib/mg/setupterm.c
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/* $NetBSD: setupterm.c,v 1.9 2019/04/11 23:52:08 jakllsch Exp $ */ | |||||
/* | |||||
* Copyright (c) 2009, 2011 The NetBSD Foundation, Inc. | |||||
* | |||||
* This code is derived from software contributed to The NetBSD Foundation | |||||
* by Roy Marples. | |||||
* | |||||
* 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. | |||||
* | |||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. | |||||
*/ | |||||
#include <sys/cdefs.h> | |||||
#include <sys/ioctl.h> | |||||
#include <err.h> | |||||
#include <stdbool.h> | |||||
#include <stdio.h> | |||||
#include <stdlib.h> | |||||
#include <strings.h> | |||||
#include <unistd.h> | |||||
#include "term_private.h" | |||||
#include "terminfo_term.h" | |||||
/* | |||||
* use_env is really a curses function - POSIX mandates it's in curses.h | |||||
* But it has to live in terminfo because it must precede a call to setupterm(). | |||||
*/ | |||||
static bool __use_env = true; | |||||
void | |||||
use_env(bool value) | |||||
{ | |||||
__use_env = value; | |||||
} | |||||
#define reterr(code, msg) \ | |||||
do { \ | |||||
if (errret == NULL) \ | |||||
errx(EXIT_FAILURE, msg); \ | |||||
else { \ | |||||
*errret = code; \ | |||||
return ERR; \ | |||||
} \ | |||||
} while (0 /* CONSTCOND */) | |||||
#define reterrarg(code, msg, arg) \ | |||||
do { \ | |||||
if (errret == NULL) \ | |||||
errx(EXIT_FAILURE, msg, arg); \ | |||||
else { \ | |||||
*errret = code; \ | |||||
return ERR; \ | |||||
} \ | |||||
} while (0 /* CONSTCOND */) | |||||
int | |||||
ti_setupterm(TERMINAL **nterm, const char *term, int fildes, int *errret) | |||||
{ | |||||
int error; | |||||
struct winsize win; | |||||
if (term == NULL) | |||||
term = getenv("TERM"); | |||||
if (term == NULL || *term == '\0') { | |||||
*nterm = NULL; | |||||
reterr(0, "TERM environment variable not set"); | |||||
} | |||||
if (fildes == STDOUT_FILENO && !isatty(fildes)) | |||||
fildes = STDERR_FILENO; | |||||
*nterm = calloc(1, sizeof(**nterm)); | |||||
if (*nterm == NULL) | |||||
reterr(-1, "not enough memory to create terminal structure"); | |||||
error = _ti_getterm(*nterm, term, 0); | |||||
if (error != 1) { | |||||
del_curterm(*nterm); | |||||
*nterm = NULL; | |||||
switch (error) { | |||||
case -1: | |||||
reterr(error, "cannot access the terminfo database"); | |||||
/* NOTREACHED */ | |||||
case 0: | |||||
reterrarg(error, | |||||
"%s: terminal not listed in terminfo database", | |||||
term); | |||||
/* NOTREACHED */ | |||||
default: | |||||
reterr(-1, "unknown error"); | |||||
/* NOTREACHED */ | |||||
} | |||||
} | |||||
(*nterm)->fildes = fildes; | |||||
_ti_setospeed(*nterm); | |||||
if (t_generic_type(*nterm)) | |||||
reterrarg(0, "%s: generic terminal", term); | |||||
if (t_hard_copy(*nterm)) | |||||
reterrarg(1, "%s: hardcopy terminal", term); | |||||
/* If TIOCGWINSZ works, then set initial lines and columns. */ | |||||
if (ioctl(fildes, TIOCGWINSZ, &win) != -1 && | |||||
win.ws_row != 0 && win.ws_col != 0) | |||||
{ | |||||
t_lines(*nterm) = (short)win.ws_row; | |||||
t_columns(*nterm) = (short)win.ws_col; | |||||
} | |||||
/* POSIX 1003.2 requires that the environment override. */ | |||||
if (__use_env) { | |||||
char *p; | |||||
if ((p = getenv("LINES")) != NULL) | |||||
t_lines(*nterm) = (short)strtol(p, NULL, 0); | |||||
if ((p = getenv("COLUMNS")) != NULL) | |||||
t_columns(*nterm) = (short)strtol(p, NULL, 0); | |||||
} | |||||
/* POSIX requires 1 for success */ | |||||
if (errret) | |||||
*errret = 1; | |||||
return OK; | |||||
} | |||||
int | |||||
setupterm(const char *term, int fildes, int *errret) | |||||
{ | |||||
TERMINAL *nterm; | |||||
int ret; | |||||
if (errret != NULL) | |||||
*errret = ERR; | |||||
ret = ti_setupterm(&nterm, term, fildes, errret); | |||||
if (nterm != NULL) | |||||
set_curterm(nterm); | |||||
return ret; | |||||
} |