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      1 /*	$NetBSD: textdomain.c,v 1.14 2015/05/29 12:26:28 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000, 2001 Citrus Project,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __RCSID("$NetBSD: textdomain.c,v 1.14 2015/05/29 12:26:28 christos Exp $");
     31 
     32 #include <sys/param.h>
     33 
     34 #include <stdio.h>
     35 #include <string.h>
     36 #include <stdlib.h>
     37 #include <libintl.h>
     38 #include "libintl_local.h"
     39 #include "pathnames.h"
     40 
     41 static struct domainbinding __default_binding = {
     42 	.path = { _PATH_TEXTDOMAIN },
     43 	.domainname = { DEFAULT_DOMAINNAME },
     44 };
     45 struct domainbinding *__bindings = &__default_binding;
     46 char __current_domainname[PATH_MAX] = DEFAULT_DOMAINNAME;
     47 
     48 static struct domainbinding *domainbinding_lookup(const char *, int);
     49 
     50 /*
     51  * set the default domainname for dcngettext() and friends.
     52  */
     53 char *
     54 textdomain(const char *domainname)
     55 {
     56 
     57 	/* NULL pointer gives the current setting */
     58 	if (!domainname)
     59 		return __current_domainname;
     60 
     61 	/* empty string sets the value back to the default */
     62 	if (!*domainname) {
     63 		strlcpy(__current_domainname, DEFAULT_DOMAINNAME,
     64 		    sizeof(__current_domainname));
     65 	} else {
     66 		strlcpy(__current_domainname, domainname,
     67 		    sizeof(__current_domainname));
     68 	}
     69 	return __current_domainname;
     70 }
     71 
     72 char *
     73 bindtextdomain(const char *domainname, const char *dirname)
     74 {
     75 	struct domainbinding *p;
     76 
     77 	/* NULL pointer or empty string returns NULL with no operation */
     78 	if (!domainname || !*domainname)
     79 		return NULL;
     80 
     81 	if (dirname && (strlen(dirname) + 1 > sizeof(p->path)))
     82 		return NULL;
     83 
     84 #if 0
     85 	/* disallow relative path */
     86 	if (dirname[0] != '/')
     87 		return NULL;
     88 #endif
     89 
     90 	if (strlen(domainname) + 1 > sizeof(p->domainname))
     91 		return NULL;
     92 
     93 	p = domainbinding_lookup(domainname, (dirname != NULL));
     94 
     95 	if (!dirname) {
     96 		if (p)
     97 			return (p->path);
     98 		else
     99 			return (char *)__UNCONST(_PATH_TEXTDOMAIN);
    100 	}
    101 
    102 	strlcpy(p->path, dirname, sizeof(p->path));
    103 	p->mohandle.mo.mo_magic = 0; /* invalidate current mapping */
    104 
    105 	return (p->path);
    106 }
    107 
    108 char *
    109 bind_textdomain_codeset(const char *domainname, const char *codeset)
    110 {
    111 	struct domainbinding *p;
    112 
    113 	p = domainbinding_lookup(domainname, (codeset != NULL));
    114 	if (p == NULL)
    115 		return NULL;
    116 
    117 	if (codeset) {
    118 		free(p->codeset);
    119 		p->codeset = strdup(codeset);
    120 	}
    121 
    122 	return p->codeset;
    123 }
    124 
    125 /*
    126  * lookup binding for the domainname
    127  */
    128 static struct domainbinding *
    129 domainbinding_lookup(const char *domainname, int alloc)
    130 {
    131 	struct domainbinding *p;
    132 
    133 	for (p = __bindings; p; p = p->next)
    134 		if (strcmp(p->domainname, domainname) == 0)
    135 			break;
    136 
    137 	if (!p && alloc) {
    138 		p = (struct domainbinding *)malloc(sizeof(*p));
    139 		if (!p)
    140 			return NULL;
    141 		memset(p, 0, sizeof(*p));
    142 		p->next = __bindings;
    143 		strlcpy(p->domainname, domainname, sizeof(p->domainname));
    144 		__bindings = p;
    145 	}
    146 
    147 	return p;
    148 }
    149