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From f0d9e0cb24958bc11c8d83f0a3de651def2aa1d6 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Thu, 30 Apr 2020 18:30:56 +0200
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Subject: [PATCH] locale-util: add new helper locale_is_installed()
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This new helper checks whether the specified locale is installed. It's
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distinct from locale_is_valid() which just superficially checks if a
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string looks like something that could be a valid locale.
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Heavily inspired by @jsynacek's #13964.
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Replaces: #13964
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(cherry picked from commit 23fa786ca67ed3a32930ff1a7b175ac823db187c)
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Related: #1755287
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---
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src/basic/locale-util.c | 15 +++++++++++++++
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src/basic/locale-util.h | 1 +
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2 files changed, 16 insertions(+)
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diff --git a/src/basic/locale-util.c b/src/basic/locale-util.c
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index 7cd143ea6f..42ef309ebd 100644
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--- a/src/basic/locale-util.c
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+++ b/src/basic/locale-util.c
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@@ -204,6 +204,21 @@ bool locale_is_valid(const char *name) {
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return true;
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}
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+int locale_is_installed(const char *name) {
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+ if (!locale_is_valid(name))
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+ return false;
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+
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+ if (STR_IN_SET(name, "C", "POSIX")) /* These ones are always OK */
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+ return true;
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+
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+ _cleanup_(freelocalep) locale_t loc =
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+ newlocale(LC_ALL_MASK, name, 0);
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+ if (loc == (locale_t) 0)
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+ return errno == ENOMEM ? -ENOMEM : false;
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+
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+ return true;
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+}
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+
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void init_gettext(void) {
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setlocale(LC_ALL, "");
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textdomain(GETTEXT_PACKAGE);
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diff --git a/src/basic/locale-util.h b/src/basic/locale-util.h
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index 368675f286..b40f9c641a 100644
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--- a/src/basic/locale-util.h
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+++ b/src/basic/locale-util.h
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@@ -31,6 +31,7 @@ typedef enum LocaleVariable {
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int get_locales(char ***l);
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bool locale_is_valid(const char *name);
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+int locale_is_installed(const char *name);
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#define _(String) gettext(String)
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#define N_(String) String
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