sh: Add \u/\U support (in $'...') for UTF-8.

Because we have no iconv in base, support for other charsets is not
possible.

Note that \u/\U are processed using the locale that was active when the
shell started. This is necessary to avoid behaviour that depends on the
parse/execute split (for example when placing braces around an entire
script). Therefore, UTF-8 encoding is implemented manually.

1 files changed, 7 insertions, 0 deletions

diff --git a/bin/sh/var.c b/bin/sh/var.c
index 33890db..84b6dea 100644
--- a/bin/sh/var.c
+++ b/bin/sh/var.c
@@ -517,6 +517,13 @@ updatecharset(void)
 	localeisutf8 = !strcmp(charset, "UTF-8");
 }
 
+void
+initcharset(void)
+{
+	updatecharset();
+	initial_localeisutf8 = localeisutf8;
+}
+
 /*
  * Generate a list of exported variables.  This routine is used to construct
  * the third argument to execve when executing a program.