ash: optional support for $'...\t...\n...' bashism

function                                             old     new   delta
readtoken1                                          2824    3172    +348
static.C_escapes                                       -      18     +18
parse_command                                       1504    1500      -4
SIT                                                   89      83      -6
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/2 up/down: 366/-10)           Total: 356 bytes

2 files changed, 16 insertions, 0 deletions

diff --git a/shell/ash_test/ash-quoting/dollar_squote_bash1.right b/shell/ash_test/ash-quoting/dollar_squote_bash1.right
new file mode 100644
index 000000000..57536b1d9
--- /dev/null
+++ b/shell/ash_test/ash-quoting/dollar_squote_bash1.right
@@ -0,0 +1,9 @@
+a       b
+a
+b c
+def
+a'b c"d e\f
+a3b c3b e33f
+a\80b c08b
+a3b c30b
+x       y
diff --git a/shell/ash_test/ash-quoting/dollar_squote_bash1.tests b/shell/ash_test/ash-quoting/dollar_squote_bash1.tests
new file mode 100755
index 000000000..93a56cac3
--- /dev/null
+++ b/shell/ash_test/ash-quoting/dollar_squote_bash1.tests
@@ -0,0 +1,7 @@
+echo $'a\tb'
+echo $'a\nb' $'c\nd''ef'
+echo $'a\'b' $'c\"d' $'e\\f'
+echo $'a\63b' $'c\063b' $'e\0633f'
+echo $'a\80b' $'c\608b'
+echo $'a\x33b' $'c\x330b'
+echo $'x\x9y'