ash: bash compat: "shift $BIGNUM" is equivalent to "shift 1"

2 files changed, 19 insertions, 0 deletions

diff --git a/shell/ash_test/ash-misc/shift1.right b/shell/ash_test/ash-misc/shift1.right
new file mode 100644
index 000000000..b53453c3a
--- /dev/null
+++ b/shell/ash_test/ash-misc/shift1.right
@@ -0,0 +1,9 @@
+2 3 4
+0: shift: line 1: Illegal number: -1
+1 2 3 4
+2 3 4
+3 4
+4
+
+1 2 3 4
+1 2 3 4
diff --git a/shell/ash_test/ash-misc/shift1.tests b/shell/ash_test/ash-misc/shift1.tests
new file mode 100755
index 000000000..0992d9b1b
--- /dev/null
+++ b/shell/ash_test/ash-misc/shift1.tests
@@ -0,0 +1,10 @@
+$THIS_SH -c 'shift;    echo "$@"' 0 1 2 3 4
+#We do abort on -1, but then we abort. bash executes echo.
+$THIS_SH -c 'shift -1; echo "$@"' 0 1 2 3 4
+$THIS_SH -c 'shift  0; echo "$@"' 0 1 2 3 4
+$THIS_SH -c 'shift  1; echo "$@"' 0 1 2 3 4
+$THIS_SH -c 'shift  2; echo "$@"' 0 1 2 3 4
+$THIS_SH -c 'shift  3; echo "$@"' 0 1 2 3 4
+$THIS_SH -c 'shift  4; echo "$@"' 0 1 2 3 4
+$THIS_SH -c 'shift  5; echo "$@"' 0 1 2 3 4
+$THIS_SH -c 'shift  6; echo "$@"' 0 1 2 3 4