shared: add is_efiboot()

[elogind.git] / src / shared / util.c

diff --git a/src/shared/util.c b/src/shared/util.c
index 402b7caa3f56a015e3ff687402d94f36b9eadb7a..99836953bfafd8853ba3d217476b5cd42139b9f2 100644 (file)
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -57,6 +57,8 @@
 #include <sys/vfs.h>
 #include <linux/magic.h>
 #include <limits.h>
+#include <langinfo.h>
+#include <locale.h>
 
 #include "macro.h"
 #include "util.h"
@@ -75,6 +77,10 @@ char **saved_argv = NULL;
 static volatile unsigned cached_columns = 0;
 static volatile unsigned cached_lines = 0;
 
+bool is_efiboot(void) {
+        return access("/sys/firmware/efi", F_OK) >= 0;
+}
+
 size_t page_size(void) {
         static __thread size_t pgsz = 0;
         long r;
@@ -6115,3 +6121,45 @@ void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
         }
         return NULL;
 }
+
+bool is_locale_utf8(void) {
+        const char *set;
+        static int cached_answer = -1;
+
+        if (cached_answer >= 0)
+                goto out;
+
+        if (!setlocale(LC_ALL, "")) {
+                cached_answer = true;
+                goto out;
+        }
+
+        set = nl_langinfo(CODESET);
+        if (!set) {
+                cached_answer = true;
+                goto out;
+        }
+
+        cached_answer = streq(set, "UTF-8");
+out:
+        return (bool)cached_answer;
+}
+
+const char *draw_special_char(DrawSpecialChar ch) {
+        static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = {
+                /* UTF-8 */ {
+                        [DRAW_BOX_VERT]           = "\342\224\202", /* │ */
+                        [DRAW_BOX_VERT_AND_RIGHT] = "\342\224\234", /* ├ */
+                        [DRAW_BOX_UP_AND_RIGHT]   = "\342\224\224", /* └ */
+                        [DRAW_TRIANGULAR_BULLET]  = "\342\200\243", /* ‣ */
+                },
+                /* ASCII fallback */ {
+                        [DRAW_BOX_VERT] = "|",
+                        [DRAW_BOX_VERT_AND_RIGHT] = "+",
+                        [DRAW_BOX_UP_AND_RIGHT]   = "\\",
+                        [DRAW_TRIANGULAR_BULLET]  = ">",
+                }
+        };
+
+        return draw_table[!is_locale_utf8()][ch];
+}