Added randomize test option to ./check

Merge of master-melb:xfs-cmds:24664a by kenmcd.

  Added comment about the randomize '-r' option.

README

@@ -76,6 +76,7 @@ Running tests:
     - for udf tests: ./check -udf [test(s)]
       Running all the udf tests: ./check -udf -g udf
     - for running nfs tests: ./check -nfs [test(s)]
+    - To randomize test order: ./check -r [test(s)]
 
     
     The check script tests the return value of each script, and

common

@@ -1,6 +1,6 @@
 ##/bin/sh 
 #
-# Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
+# Copyright (c) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.
 #
 # common procedures for QA scripts
 #
@@ -34,6 +34,7 @@ showme=false
 sortme=false
 expunge=true
 have_test_arg=false
+randomize=false
 rm -f $tmp.list $tmp.tmp $tmp.sed
 
 export FSTYP=xfs
@@ -117,7 +118,7 @@ check options
     -q			quick [deprecated]
     -T			output timestamps
     -x group[,group...]	exclude tests from these groups
-    -r 			randomize order
+    -r 			randomize test order
 '
 	    exit 0
 	    ;;
@@ -155,6 +156,10 @@ check options
 	    showme=true
 	    xpand=false
 	    ;;
+        -r)	# randomize test order
+	    randomize=true
+	    xpand=false
+	    ;;
 
 	-T)	# turn on timestamp output
 	    timestamp=true
@@ -248,6 +253,11 @@ fi
 list=`sort $tmp.list`
 rm -f $tmp.list $tmp.tmp $tmp.sed
 
+if $randomize
+then
+    list=`echo $list | awk -f randomize.awk`
+fi
+
 case "$FSTYP" in
     xfs)
 	 [ "$XFS_LOGPRINT_PROG" = "" ] && _fatal "xfs_logprint not found"

randomize.awk

@@ -0,0 +1,23 @@
+# Copyright (c) 2005 Silicon Graphics, Inc.  All Rights Reserved.
+
+# randomize stdin.
+
+function randomize(array, N) {
+  for(i = 0; i < N; i++) {
+    j = int(rand()*N)
+    if ( i != j) {
+    tmp = array[i]
+    array[i] = array[j]
+    array[j] = tmp
+    }
+  }
+return
+}
+
+{
+    srand()
+    for (i = 0; i < NF; i++ ) array[i] = $(i+1)
+    randomize(array, NF)
+    for (i = 0; i < NF; i++) printf("%s ", array[i])
+}
+