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setupterm.c revision 1.1 
      1 /* $NetBSD: setupterm.c,v 1.1 2010/02/03 15:16:32 roy Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2009 The NetBSD Foundation, Inc.
      5  *
      6  * This code is derived from software contributed to The NetBSD Foundation
      7  * by Roy Marples.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include <sys/cdefs.h>
     31 __RCSID("$NetBSD: setupterm.c,v 1.1 2010/02/03 15:16:32 roy Exp $");
     32 
     33 #include <assert.h>
     34 #include <err.h>
     35 #include <stdio.h>
     36 #include <stdlib.h>
     37 #include <strings.h>
     38 #include <unistd.h>
     39 #include <term_private.h>
     40 #include <term.h>
     41 
     42 #define reterr(code, msg)						      \
     43 	do {								      \
     44 		if (errret == NULL)					      \
     45 			errx(EXIT_FAILURE, msg);			      \
     46 		else {							      \
     47 			*errret = code;					      \
     48 			return ERR;					      \
     49 		}							      \
     50 	} while (0 /* CONSTCOND */)
     51 
     52 #define reterrarg(code, msg, arg) \
     53 	do {								      \
     54 		if (errret == NULL)					      \
     55 			errx(EXIT_FAILURE, msg, arg);			      \
     56 		else {							      \
     57 			*errret = code;					      \
     58 			return ERR;					      \
     59 		}							      \
     60 	} while (0 /* CONSTCOND */)
     61 
     62 
     63 int
     64 ti_setupterm(TERMINAL **nterm, const char *term, int fildes, int *errret)
     65 {
     66 	int error;
     67 
     68 	_DIAGASSERT(nterm != NULL);
     69 
     70        	if (term == NULL)
     71 		term = getenv("TERM");
     72 	if (term == NULL || *term == '\0')
     73 		reterr(-1, "TERM environment variable not set");
     74 	if (fildes == STDOUT_FILENO && !isatty(fildes))
     75 		fildes = STDERR_FILENO;
     76 
     77 	*nterm = calloc(1, sizeof(**nterm));
     78 	if (*nterm == NULL)
     79 		reterr(-1, "not enough memory to create terminal structure");
     80 
     81 	error = _ti_getterm(*nterm, term, 0);
     82 	if (error != 1) {
     83 		free(*nterm);
     84 		*nterm = NULL;
     85 		switch (error) {
     86 		case -1:
     87 			reterr(error, "cannot access the terminfo database");
     88 			/* NOTREACHED */
     89 		case 0:
     90 			reterrarg(error,
     91 			    "%s: terminal not listed in terminfo datase",
     92 			    term);
     93 			/* NOTREACHED */
     94 		default:
     95 			reterr(-1, "unknown error");
     96 			/* NOTREACHED */
     97 		}
     98 	}
     99 
    100 	(*nterm)->fildes = fildes;
    101 	_ti_setospeed(*nterm);
    102 	if (t_generic_type(*nterm))
    103 		reterrarg(0, "%s: generic terminal", term);
    104 	if (t_hard_copy(*nterm))
    105 		reterrarg(1, "%s: hardcopy terminal", term);
    106 	/* POSIX requires 1 for success */
    107 	if (errret)
    108 		*errret = 1;
    109 	return OK;
    110 }
    111 
    112 int
    113 setupterm(const char *term, int fildes, int *errret)
    114 {
    115 	TERMINAL *nterm;
    116 	int ret;
    117 
    118 	if (errret != NULL)
    119 		*errret = ERR;
    120 	ret = ti_setupterm(&nterm, term, fildes, errret);
    121 	if (nterm != NULL)
    122 		set_curterm(nterm);
    123 	return ret;
    124 }
    125