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-rw-r--r--src/shared/locale-setup.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/src/shared/locale-setup.c b/src/shared/locale-setup.c
new file mode 100644
index 0000000..b8c6647
--- /dev/null
+++ b/src/shared/locale-setup.c
@@ -0,0 +1,256 @@
+/* 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;
+}