add primitive shuf

1 files changed, 16 insertions, 0 deletions

diff --git a/files/common/sbin/shuf b/files/common/sbin/shuf
new file mode 100755
index 0000000..8d82d4d
--- /dev/null
+++ b/files/common/sbin/shuf
@@ -0,0 +1,16 @@
+#!/usr/bin/awk -f
+BEGIN{
+    srand() # seed by time
+    srand(seed+srand()) # allow additional external seed
+}
+{ lines[++d]=$0 }
+END{
+    while (d > 0) {
+	if (e==d) {break}
+	r = int(1 + rand() * d)
+	print lines[r]
+	lines[r] = lines[d]
+	delete lines[d]
+	--d
+    }
+}