[PATCH 8/9] rcutorture: Simplify logging

[SeongJae Park <sj38.park@gmail.com>]

'kvm.sh' and 'kvm-test-1-run.sh' log messages by printing the message to
'stdout' then writing it into the log file.  Generation of the message
occurs twice once for 'stdout', and once for log file.  It is redundant.
Moreover, many of the messages are containing 'date' output inside the
messages.  Because the 'date' calculation also be called twice (once for
stdout print, once for log file write), the date information in stdout
and log file can be different.  It could confuse some sensitive mind
people.

This commit simplifies the logging procedure by using 'tee'.

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
---
 .../selftests/rcutorture/bin/kvm-test-1-run.sh     |  4 +--
 tools/testing/selftests/rcutorture/bin/kvm.sh      | 32 ++++++++--------------
 2 files changed, 12 insertions(+), 24 deletions(-)

diff --git a/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh
index 0af36a721b9c..2678a9d0733d 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh
@@ -154,9 +154,7 @@ cpu_count=`configfrag_boot_cpus "$boot_args" "$config_template" "$cpu_count"`
 vcpus=`identify_qemu_vcpus`
 if test $cpu_count -gt $vcpus
 then
-	echo CPU count limited from $cpu_count to $vcpus
-	touch $resdir/Warnings
-	echo CPU count limited from $cpu_count to $vcpus >> $resdir/Warnings
+	echo CPU count limited from $cpu_count to $vcpus | tee -a $resdir/Warnings
 	cpu_count=$vcpus
 fi
 qemu_args="`specify_qemu_cpus "$QEMU" "$qemu_args" "$cpu_count"`"
diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
index cd62933e33d7..a7bbe2dc8791 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -331,8 +331,7 @@ awk < $T/cfgcpu.pack \
 # Dump out the scripting required to run one test batch.
 function dump(first, pastlast, batchnum)
 {
-	print "echo ----Start batch " batchnum ": `date`";
-	print "echo ----Start batch " batchnum ": `date` >> " rd "/log";
+	print "echo ----Start batch " batchnum ": `date` | tee -a " rd "log";
 	print "needqemurun="
 	jn=1
 	for (j = first; j < pastlast; j++) {
@@ -349,21 +348,18 @@ function dump(first, pastlast, batchnum)
 			ovf = "-ovf";
 		else
 			ovf = "";
-		print "echo ", cfr[jn], cpusr[jn] ovf ": Starting build. `date`";
-		print "echo ", cfr[jn], cpusr[jn] ovf ": Starting build. `date` >> " rd "/log";
+		print "echo ", cfr[jn], cpusr[jn] ovf ": Starting build. `date` | tee -a " rd "log";
 		print "rm -f " builddir ".*";
 		print "touch " builddir ".wait";
 		print "mkdir " builddir " > /dev/null 2>&1 || :";
 		print "mkdir " rd cfr[jn] " || :";
 		print "kvm-test-1-run.sh " CONFIGDIR cf[j], builddir, rd cfr[jn], dur " \"" TORTURE_QEMU_ARG "\" \"" TORTURE_BOOTARGS "\" > " rd cfr[jn]  "/kvm-test-1-run.sh.out 2>&1 &"
-		print "echo ", cfr[jn], cpusr[jn] ovf ": Waiting for build to complete. `date`";
-		print "echo ", cfr[jn], cpusr[jn] ovf ": Waiting for build to complete. `date` >> " rd "/log";
+		print "echo ", cfr[jn], cpusr[jn] ovf ": Waiting for build to complete. `date` | tee -a " rd "log";
 		print "while test -f " builddir ".wait"
 		print "do"
 		print "\tsleep 1"
 		print "done"
-		print "echo ", cfr[jn], cpusr[jn] ovf ": Build complete. `date`";
-		print "echo ", cfr[jn], cpusr[jn] ovf ": Build complete. `date` >> " rd "/log";
+		print "echo ", cfr[jn], cpusr[jn] ovf ": Build complete. `date` | tee -a " rd "log";
 		jn++;
 	}
 	for (j = 1; j < jn; j++) {
@@ -371,8 +367,7 @@ function dump(first, pastlast, batchnum)
 		print "rm -f " builddir ".ready"
 		print "if test -f \"" rd cfr[j] "/builtkernel\""
 		print "then"
-		print "\techo ----", cfr[j], cpusr[j] ovf ": Kernel present. `date`";
-		print "\techo ----", cfr[j], cpusr[j] ovf ": Kernel present. `date` >> " rd "/log";
+		print "\techo ----", cfr[j], cpusr[j] ovf ": Kernel present. `date` | tee -a " rd "log";
 		print "\tneedqemurun=1"
 		print "fi"
 	}
@@ -386,31 +381,26 @@ function dump(first, pastlast, batchnum)
 		njitter = ja[1];
 	if (TORTURE_BUILDONLY && njitter != 0) {
 		njitter = 0;
-		print "echo Build-only run, so suppressing jitter >> " rd "/log"
+		print "echo Build-only run, so suppressing jitter | tee -a " rd "log"
 	}
 	if (TORTURE_BUILDONLY) {
 		print "needqemurun="
 	}
 	print "if test -n \"$needqemurun\""
 	print "then"
-	print "\techo ---- Starting kernels. `date`";
-	print "\techo ---- Starting kernels. `date` >> " rd "/log";
+	print "\techo ---- Starting kernels. `date` | tee -a " rd "log";
 	for (j = 0; j < njitter; j++)
 		print "\tjitter.sh " j " " dur " " ja[2] " " ja[3] "&"
 	print "\twait"
-	print "\techo ---- All kernel runs complete. `date`";
-	print "\techo ---- All kernel runs complete. `date` >> " rd "/log";
+	print "\techo ---- All kernel runs complete. `date` | tee -a " rd "log";
 	print "else"
 	print "\twait"
-	print "\techo ---- No kernel runs. `date`";
-	print "\techo ---- No kernel runs. `date` >> " rd "/log";
+	print "\techo ---- No kernel runs. `date` | tee -a " rd "log";
 	print "fi"
 	for (j = 1; j < jn; j++) {
 		builddir=KVM "/b" j
-		print "echo ----", cfr[j], cpusr[j] ovf ": Build/run results:";
-		print "echo ----", cfr[j], cpusr[j] ovf ": Build/run results: >> " rd "/log";
-		print "cat " rd cfr[j]  "/kvm-test-1-run.sh.out";
-		print "cat " rd cfr[j]  "/kvm-test-1-run.sh.out >> " rd "/log";
+		print "echo ----", cfr[j], cpusr[j] ovf ": Build/run results: | tee -a " rd "log";
+		print "cat " rd cfr[j]  "/kvm-test-1-run.sh.out | tee -a " rd "log";
 	}
 }
 
-- 
2.13.0