[PATCH] zram-swap: robustify mkswap/swapon/swapoff invocation

[Rui Salvaterra]

Instead of assuming /sbin contains the correct BusyBox symlinks, directly invoke
the busybox executable. The required utilities are guaranteed to be present,
since the zram-swap package selects them. Additionally, don't assume busybox
resides in /bin, rely on PATH to find it.

Signed-off-by: Rui Salvaterra <rsalvaterra at gmail.com>
---
 package/system/zram-swap/Makefile        |  2 +-
 package/system/zram-swap/files/zram.init | 20 +++-----------------
 2 files changed, 4 insertions(+), 18 deletions(-)

diff --git a/package/system/zram-swap/Makefile b/package/system/zram-swap/Makefile
index 80f87fcdff..5c56828d10 100644
--- a/package/system/zram-swap/Makefile
+++ b/package/system/zram-swap/Makefile
@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=zram-swap
-PKG_RELEASE:=8
+PKG_RELEASE:=9
 
 PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
 
diff --git a/package/system/zram-swap/files/zram.init b/package/system/zram-swap/files/zram.init
index d97e85efa5..7ea80bc2ca 100755
--- a/package/system/zram-swap/files/zram.init
+++ b/package/system/zram-swap/files/zram.init
@@ -34,20 +34,6 @@ zram_applicable()
 		return 1
 	}
 
-	[ -x /sbin/mkswap ] || {
-		logger -s -t zram_applicable -p daemon.err "[ERROR] 'BusyBox mkswap' not installed"
-		return 1
-	}
-
-	[ -x /sbin/swapon ] || {
-		logger -s -t zram_applicable -p daemon.err "[ERROR] 'BusyBox swapon' not installed"
-		return 1
-	}
-
-	[ -x /sbin/swapoff ] || {
-		logger -s -t zram_applicable -p daemon.err "[ERROR] 'BusyBox swapoff' not installed"
-		return 1
-	}
 }
 
 zram_dev()
@@ -171,8 +157,8 @@ start()
 	zram_reset "$zram_dev" "enforcing defaults"
 	zram_comp_algo "$zram_dev"
 	echo $(( $zram_size * 1024 * 1024 )) >"/sys/block/$( basename "$zram_dev" )/disksize"
-	/sbin/mkswap "$zram_dev"
-	/sbin/swapon -d $zram_priority "$zram_dev"
+	busybox mkswap "$zram_dev"
+	busybox swapon -d $zram_priority "$zram_dev"
 }
 
 stop()
@@ -181,7 +167,7 @@ stop()
 
 	for zram_dev in $( grep zram /proc/swaps |awk '{print $1}' ); do {
 		logger -s -t zram_stop -p daemon.debug "deactivate swap $zram_dev"
-		/sbin/swapoff "$zram_dev" && zram_reset "$zram_dev" "claiming memory back"
+		busybox swapoff "$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"
-- 
2.32.0