[PATCH v2] zram-swap: explicitely use mkswap/swapon/swapoff from /sbin

[Rui Salvaterra]

The required BusyBox applets are enabled by default, so we can rely on them
being present in the system. This way, we make sure there are no conflicts with
less featured variants of these same applets which might also be present in the
system.

Fixes: 0bd7dfa3ed60588ec83a8f60f48b6991ebb16940

Signed-off-by: Rui Salvaterra <rsalvaterra at gmail.com>
---
 package/system/zram-swap/files/zram.init | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/package/system/zram-swap/files/zram.init b/package/system/zram-swap/files/zram.init
index a6126e578f..f31a87438c 100755
--- a/package/system/zram-swap/files/zram.init
+++ b/package/system/zram-swap/files/zram.init
@@ -35,18 +35,18 @@ zram_applicable()
 		return 1
 	}
 
-	which mkswap >/dev/null || {
-		logger -s -t zram_applicable -p daemon.err "[ERROR] 'mkswap' not installed"
+	[ -x /sbin/mkswap ] || {
+		logger -s -t zram_applicable -p daemon.err "[ERROR] 'BusyBox mkswap' not installed"
 		return 1
 	}
 
-	which swapon >/dev/null || {
-		logger -s -t zram_applicable -p daemon.err "[ERROR] 'swapon' not installed"
+	[ -x /sbin/swapon ] || {
+		logger -s -t zram_applicable -p daemon.err "[ERROR] 'BusyBox swapon' not installed"
 		return 1
 	}
 
-	which swapoff >/dev/null || {
-		logger -s -t zram_applicable -p daemon.err "[ERROR] 'swapoff' not installed"
+	[ -x /sbin/swapoff ] || {
+		logger -s -t zram_applicable -p daemon.err "[ERROR] 'BusyBox swapoff' not installed"
 		return 1
 	}
 }
@@ -181,8 +181,8 @@ start()
 	zram_comp_algo "$zram_dev"
 	zram_comp_streams "$zram_dev"
 	echo $(( $zram_size * 1024 * 1024 )) >"/sys/block/$( basename "$zram_dev" )/disksize"
-	mkswap "$zram_dev"
-	swapon -d $zram_priority "$zram_dev"
+	/sbin/mkswap "$zram_dev"
+	/sbin/swapon -d $zram_priority "$zram_dev"
 }
 
 stop()
@@ -191,7 +191,7 @@ stop()
 
 	for zram_dev in $( grep zram /proc/swaps |awk '{print $1}' ); do {
 		logger -s -t zram_stop -p daemon.debug "deactivate swap $zram_dev"
-		swapoff "$zram_dev" && zram_reset "$zram_dev" "claiming memory back"
+		/sbin/swapoff "$zram_dev" && zram_reset "$zram_dev" "claiming memory back"
 		local dev_index="$( echo $zram_dev | grep -o "[0-9]*$" )"
 		if [ $dev_index -ne 0 ]; then
 			logger -s -t zram_stop -p daemon.debug "removing zram $zram_dev"
-- 
2.27.0