[PATCH blktests v2 1/2] Move and rename uptime_s()

[Bart Van Assche <bvanassche@acm.org>]

Make it easy to use the uptime_s() function from block tests. Change the
implementation of this function into something that is easier to read.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 common/multipath-over-rdma | 9 +--------
 common/rc                  | 5 +++++
 tests/nvmeof-mp/rc         | 2 +-
 tests/srp/014              | 2 +-
 tests/srp/rc               | 2 +-
 5 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/common/multipath-over-rdma b/common/multipath-over-rdma
index 65ebb7b7f5f7..545a81e8c18e 100644
--- a/common/multipath-over-rdma
+++ b/common/multipath-over-rdma
@@ -129,19 +129,12 @@ held_by() {
 	done
 }
 
-# System uptime in seconds.
-uptime_s() {
-	local a b
-
-	echo "$(</proc/uptime)" | { read -r a b && echo "${a%%.*}"; }
-}
-
 # Sleep until either $1 seconds have elapsed or until the deadline $2 has been
 # reached. Return 1 if and only if the deadline has been met.
 sleep_until() {
 	local duration=$1 deadline=$2 u
 
-	u=$(uptime_s)
+	u=$(_uptime_s)
 	if [ $((u + duration)) -le "$deadline" ]; then
 		sleep "$duration"
 	else
diff --git a/common/rc b/common/rc
index 41aee3aaa735..87b1e0718382 100644
--- a/common/rc
+++ b/common/rc
@@ -246,3 +246,8 @@ _test_dev_is_partition() {
 _filter_xfs_io_error() {
 	sed -e 's/^\(.*\)64\(: .*$\)/\1\2/'
 }
+
+# System uptime in seconds.
+_uptime_s() {
+	awk '{ print int($1) }' /proc/uptime
+}
diff --git a/tests/nvmeof-mp/rc b/tests/nvmeof-mp/rc
index 2493fcee12de..278843a1270d 100755
--- a/tests/nvmeof-mp/rc
+++ b/tests/nvmeof-mp/rc
@@ -113,7 +113,7 @@ simulate_network_failure_loop() {
 
 	[ -e "$dev" ] || return $?
 	[ -n "$duration" ] || return $?
-	deadline=$(($(uptime_s) + duration))
+	deadline=$(($(_uptime_s) + duration))
 	while [ $rc = 0 ]; do
 		sleep_until 5 ${deadline} || break
 		for d in $(held_by "$dev"); do
diff --git a/tests/srp/014 b/tests/srp/014
index 8ecd8a439a82..7afde6284b83 100755
--- a/tests/srp/014
+++ b/tests/srp/014
@@ -69,7 +69,7 @@ sg_reset_loop() {
 	[ -e "$dev" ] || return $?
 	[ -n "$duration" ] || return $?
 	reset_type=(-d -b)
-	deadline=$(($(uptime_s) + duration))
+	deadline=$(($(_uptime_s) + duration))
 	while true; do
 		sleep_until 1 ${deadline} || break
 		cmd="sg_reset --no-esc ${reset_type[i++ % 2]} $dev"
diff --git a/tests/srp/rc b/tests/srp/rc
index 696d94e5fb97..a1bc09b496ec 100755
--- a/tests/srp/rc
+++ b/tests/srp/rc
@@ -247,7 +247,7 @@ simulate_network_failure_loop() {
 
 	[ -e "$dev" ] || return $?
 	[ -n "$duration" ] || return $?
-	deadline=$(($(uptime_s) + duration))
+	deadline=$(($(_uptime_s) + duration))
 	s=5
 	while [ $rc = 0 ]; do
 		sleep_until 5 ${deadline} || break
-- 
2.24.0.rc0.303.g954a862665-goog