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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <errno.h>
#include <sys/stat.h>
#include "env-file-label.h"
#include "env-file.h"
#include "env-util.h"
#include "locale-setup.h"
#include "proc-cmdline.h"
#include "strv.h"
void locale_context_clear(LocaleContext *c) {
assert(c);
c->mtime = USEC_INFINITY;
for (LocaleVariable i = 0; i < _VARIABLE_LC_MAX; i++)
c->locale[i] = mfree(c->locale[i]);
}
int locale_context_load(LocaleContext *c, LocaleLoadFlag flag) {
int r;
assert(c);
if (FLAGS_SET(flag, LOCALE_LOAD_PROC_CMDLINE)) {
locale_context_clear(c);
r = proc_cmdline_get_key_many(PROC_CMDLINE_STRIP_RD_PREFIX,
"locale.LANG", &c->locale[VARIABLE_LANG],
"locale.LANGUAGE", &c->locale[VARIABLE_LANGUAGE],
"locale.LC_CTYPE", &c->locale[VARIABLE_LC_CTYPE],
"locale.LC_NUMERIC", &c->locale[VARIABLE_LC_NUMERIC],
"locale.LC_TIME", &c->locale[VARIABLE_LC_TIME],
"locale.LC_COLLATE", &c->locale[VARIABLE_LC_COLLATE],
"locale.LC_MONETARY", &c->locale[VARIABLE_LC_MONETARY],
"locale.LC_MESSAGES", &c->locale[VARIABLE_LC_MESSAGES],
"locale.LC_PAPER", &c->locale[VARIABLE_LC_PAPER],
"locale.LC_NAME", &c->locale[VARIABLE_LC_NAME],
"locale.LC_ADDRESS", &c->locale[VARIABLE_LC_ADDRESS],
"locale.LC_TELEPHONE", &c->locale[VARIABLE_LC_TELEPHONE],
"locale.LC_MEASUREMENT", &c->locale[VARIABLE_LC_MEASUREMENT],
"locale.LC_IDENTIFICATION", &c->locale[VARIABLE_LC_IDENTIFICATION]);
if (r < 0 && r != -ENOENT)
log_debug_errno(r, "Failed to read /proc/cmdline, ignoring: %m");
if (r > 0)
goto finalize;
}
if (FLAGS_SET(flag, LOCALE_LOAD_LOCALE_CONF)) {
struct stat st;
usec_t t;
r = stat("/etc/locale.conf", &st);
if (r < 0 && errno != ENOENT)
return log_debug_errno(errno, "Failed to stat /etc/locale.conf: %m");
if (r >= 0) {
/* If mtime is not changed, then we do not need to re-read the file. */
t = timespec_load(&st.st_mtim);
if (c->mtime != USEC_INFINITY && t == c->mtime)
return 0;
locale_context_clear(c);
c->mtime = t;
r = parse_env_file(NULL, "/etc/locale.conf",
"LANG", &c->locale[VARIABLE_LANG],
"LANGUAGE", &c->locale[VARIABLE_LANGUAGE],
"LC_CTYPE", &c->locale[VARIABLE_LC_CTYPE],
"LC_NUMERIC", &c->locale[VARIABLE_LC_NUMERIC],
"LC_TIME", &c->locale[VARIABLE_LC_TIME],
"LC_COLLATE", &c->locale[VARIABLE_LC_COLLATE],
"LC_MONETARY", &c->locale[VARIABLE_LC_MONETARY],
"LC_MESSAGES", &c->locale[VARIABLE_LC_MESSAGES],
"LC_PAPER", &c->locale[VARIABLE_LC_PAPER],
"LC_NAME", &c->locale[VARIABLE_LC_NAME],
"LC_ADDRESS", &c->locale[VARIABLE_LC_ADDRESS],
"LC_TELEPHONE", &c->locale[VARIABLE_LC_TELEPHONE],
"LC_MEASUREMENT", &c->locale[VARIABLE_LC_MEASUREMENT],
"LC_IDENTIFICATION", &c->locale[VARIABLE_LC_IDENTIFICATION]);
if (r < 0)
return log_debug_errno(r, "Failed to read /etc/locale.conf: %m");
goto finalize;
}
}
if (FLAGS_SET(flag, LOCALE_LOAD_ENVIRONMENT)) {
locale_context_clear(c);
/* Fill in what we got passed from systemd. */
for (LocaleVariable p = 0; p < _VARIABLE_LC_MAX; p++) {
const char *name = ASSERT_PTR(locale_variable_to_string(p));
r = free_and_strdup(&c->locale[p], empty_to_null(getenv(name)));
if (r < 0)
return log_oom_debug();
}
goto finalize;
}
/* Nothing loaded. */
locale_context_clear(c);
return 0;
finalize:
if (FLAGS_SET(flag, LOCALE_LOAD_SIMPLIFY))
locale_variables_simplify(c->locale);
return 0;
}
int locale_context_build_env(const LocaleContext *c, char ***ret_set, char ***ret_unset) {
_cleanup_strv_free_ char **set = NULL, **unset = NULL;
int r;
assert(c);
if (!ret_set && !ret_unset)
return 0;
for (LocaleVariable p = 0; p < _VARIABLE_LC_MAX; p++) {
const char *name = ASSERT_PTR(locale_variable_to_string(p));
if (isempty(c->locale[p])) {
if (!ret_unset)
continue;
r = strv_extend(&unset, name);
} else {
if (!ret_set)
continue;
r = strv_env_assign(&set, name, c->locale[p]);
}
if (r < 0)
return r;
}
if (ret_set)
*ret_set = TAKE_PTR(set);
if (ret_unset)
*ret_unset = TAKE_PTR(unset);
return 0;
}
int locale_context_save(LocaleContext *c, char ***ret_set, char ***ret_unset) {
_cleanup_strv_free_ char **set = NULL, **unset = NULL;
struct stat st;
int r;
assert(c);
/* Set values will be returned as strv in *ret on success. */
r = locale_context_build_env(c, &set, ret_unset ? &unset : NULL);
if (r < 0)
return r;
if (strv_isempty(set)) {
if (unlink("/etc/locale.conf") < 0)
return errno == ENOENT ? 0 : -errno;
c->mtime = USEC_INFINITY;
if (ret_set)
*ret_set = NULL;
if (ret_unset)
*ret_unset = NULL;
return 0;
}
r = write_env_file_label("/etc/locale.conf", set);
if (r < 0)
return r;
if (stat("/etc/locale.conf", &st) >= 0)
c->mtime = timespec_load(&st.st_mtim);
if (ret_set)
*ret_set = TAKE_PTR(set);
if (ret_unset)
*ret_unset = TAKE_PTR(unset);
return 0;
}
int locale_context_merge(const LocaleContext *c, char *l[_VARIABLE_LC_MAX]) {
assert(c);
assert(l);
for (LocaleVariable p = 0; p < _VARIABLE_LC_MAX; p++)
if (!isempty(c->locale[p]) && isempty(l[p])) {
l[p] = strdup(c->locale[p]);
if (!l[p])
return -ENOMEM;
}
return 0;
}
void locale_context_take(LocaleContext *c, char *l[_VARIABLE_LC_MAX]) {
assert(c);
assert(l);
for (LocaleVariable p = 0; p < _VARIABLE_LC_MAX; p++)
free_and_replace(c->locale[p], l[p]);
}
bool locale_context_equal(const LocaleContext *c, char *l[_VARIABLE_LC_MAX]) {
assert(c);
assert(l);
for (LocaleVariable p = 0; p < _VARIABLE_LC_MAX; p++)
if (!streq_ptr(c->locale[p], l[p]))
return false;
return true;
}
int locale_setup(char ***environment) {
_cleanup_(locale_context_clear) LocaleContext c = { .mtime = USEC_INFINITY };
_cleanup_strv_free_ char **add = NULL;
int r;
assert(environment);
r = locale_context_load(&c, LOCALE_LOAD_PROC_CMDLINE | LOCALE_LOAD_LOCALE_CONF);
if (r < 0)
return r;
r = locale_context_build_env(&c, &add, NULL);
if (r < 0)
return r;
if (strv_isempty(add)) {
/* If no locale is configured then default to compile-time default. */
add = strv_new("LANG=" SYSTEMD_DEFAULT_LOCALE);
if (!add)
return -ENOMEM;
}
if (strv_isempty(*environment))
strv_free_and_replace(*environment, add);
else {
char **merged;
merged = strv_env_merge(*environment, add);
if (!merged)
return -ENOMEM;
strv_free_and_replace(*environment, merged);
}
return 0;
}
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