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|
/* $OpenBSD: setlocale.c,v 1.30 2019/07/03 03:24:04 deraadt Exp $ */
/*
* Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
*
* 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.
*/
#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include "rune.h"
static void
freegl(char **oldgl)
{
int ic;
if (oldgl == NULL)
return;
for (ic = LC_ALL; ic < _LC_LAST; ic++)
free(oldgl[ic]);
free(oldgl);
}
static char **
dupgl(char **oldgl)
{
char **newgl;
int ic;
if ((newgl = calloc(_LC_LAST, sizeof(*newgl))) == NULL)
return NULL;
for (ic = LC_ALL; ic < _LC_LAST; ic++) {
if ((newgl[ic] = strdup(ic == LC_ALL ? "" :
oldgl == NULL ? "C" : oldgl[ic])) == NULL) {
freegl(newgl);
return NULL;
}
}
return newgl;
}
static int
changegl(int category, const char *locname, char **gl)
{
char *cp;
if ((locname = _get_locname(category, locname)) == NULL ||
(cp = strdup(locname)) == NULL)
return -1;
free(gl[category]);
gl[category] = cp;
return 0;
}
char *
setlocale(int category, const char *locname)
{
/*
* Even though only LC_CTYPE has any effect in the OpenBSD
* base system, store complete information about the global
* locale, such that third-party software can access it,
* both via setlocale(3) and via locale(1).
*/
static char global_locname[256];
static char **global_locale;
char **newgl, *firstname, *nextname;
int ic;
if (category < LC_ALL || category >= _LC_LAST)
return NULL;
/*
* Change the global locale.
*/
if (locname != NULL) {
if ((newgl = dupgl(global_locale)) == NULL)
return NULL;
if (category == LC_ALL && strchr(locname, '/') != NULL) {
/* One value for each category. */
if ((firstname = strdup(locname)) == NULL) {
freegl(newgl);
return NULL;
}
nextname = firstname;
for (ic = 1; ic < _LC_LAST; ic++)
if (nextname == NULL || changegl(ic,
strsep(&nextname, "/"), newgl) == -1)
break;
free(firstname);
if (ic < _LC_LAST || nextname != NULL) {
freegl(newgl);
return NULL;
}
} else {
/* One value only. */
if (changegl(category, locname, newgl) == -1) {
freegl(newgl);
return NULL;
}
/* One common value for all categories. */
if (category == LC_ALL) {
for (ic = 1; ic < _LC_LAST; ic++) {
if (changegl(ic, locname,
newgl) == -1) {
freegl(newgl);
return NULL;
}
}
}
}
} else
newgl = global_locale;
/*
* Assemble a string representation of the globale locale.
*/
/* setlocale(3) was never called with a non-NULL argument. */
if (newgl == NULL) {
(void)strlcpy(global_locname, "C", sizeof(global_locname));
goto done;
}
/* Individual category, or LC_ALL uniformly set. */
if (category > LC_ALL || newgl[LC_ALL][0] != '\0') {
if (strlcpy(global_locname, newgl[category],
sizeof(global_locname)) >= sizeof(global_locname))
global_locname[0] = '\0';
goto done;
}
/*
* Check whether all categories agree and return either
* the single common name for all categories or a string
* listing the names for all categories.
*/
for (ic = 2; ic < _LC_LAST; ic++)
if (strcmp(newgl[ic], newgl[1]) != 0)
break;
if (ic == _LC_LAST) {
if (strlcpy(global_locname, newgl[1],
sizeof(global_locname)) >= sizeof(global_locname))
global_locname[0] = '\0';
} else {
ic = snprintf(global_locname, sizeof(global_locname),
"%s/%s/%s/%s/%s/%s", newgl[1], newgl[2], newgl[3],
newgl[4], newgl[5], newgl[6]);
if (ic < 0 || ic >= sizeof(global_locname))
global_locname[0] = '\0';
}
done:
if (locname != NULL) {
/*
* We can't replace the global locale earlier
* because we first have to make sure that we
* also have the memory required to report success.
*/
if (global_locname[0] != '\0') {
freegl(global_locale);
global_locale = newgl;
if (category == LC_ALL || category == LC_CTYPE)
_GlobalRuneLocale =
strchr(newgl[LC_CTYPE], '.') == NULL ?
&_DefaultRuneLocale : _Utf8RuneLocale;
} else {
freegl(newgl);
return NULL;
}
}
return global_locname;
}
DEF_STRONG(setlocale);
|
