setup-efi-ivi: use printf instead of echo

This is better because echo is very different in different shells, and
interpret various special bytes differently, and its behavior may sometimes be
very surprizing.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

2 files changed, 6 insertions, 5 deletions

diff --git a/packaging/setup-efi-ivi.spec b/packaging/setup-efi-ivi.spec
index 77c6b31..023ef45 100644
--- a/packaging/setup-efi-ivi.spec
+++ b/packaging/setup-efi-ivi.spec
@@ -10,6 +10,7 @@ Requires:       gummiboot
 Requires:       /usr/bin/sed
 Requires:       /usr/bin/sort
 Requires:       /usr/bin/grep
+Requires:       /usr/bin/printf
 ExclusiveArch:  %{ix86} x86_64
 
 %description
diff --git a/setup-efi-ivi b/setup-efi-ivi
index 7f00b92..22ae9a0 100755
--- a/setup-efi-ivi
+++ b/setup-efi-ivi
@@ -9,7 +9,7 @@ PROG="setup-efi-ivi"
 # This is a helper function which prints an error message and exits
 fatal()
 {
-	echo "$PROG: error: $1" 1>&2
+	printf "%s\n" "$PROG: error: $1" 1>&2
 	exit 1
 }
 
@@ -26,15 +26,15 @@ boot_fstype=
 
 while [ "$pnum" -lt "$INSTALLERFW_PART_COUNT" ]; do
 	mountpoint="INSTALLERFW_PART${pnum}_MOUNTPOINT"
-	mountpoint="$(eval echo '$'$mountpoint)"
+	mountpoint="$(eval printf "%s" '$'$mountpoint)"
 
 	# Find out all the required data for the root and boot partition
 	if [ "$mountpoint" == "/" ]; then
 		root_partuuid=INSTALLERFW_PART${pnum}_PARTUUID
-		root_partuuid="$(eval echo '$'$root_partuuid)"
+		root_partuuid="$(eval printf "%s" '$'$root_partuuid)"
 	elif [ "$mountpoint" == "$boot_mountpoint" ]; then
 		boot_fstype=INSTALLERFW_PART${pnum}_FSTYPE
-		boot_fstype="$(eval echo '$'$boot_fstype)"
+		boot_fstype="$(eval printf "%s" '$'$boot_fstype)"
 	fi
 
 	pnum="$((pnum+1))"
@@ -59,7 +59,7 @@ mkdir -p "$boot_mountpoint/EFI/boot"
 
 # Find out the latest kernel binary in boot partition
 vmlinuz="$(ls -1 "$boot_mountpoint" | grep "^vmlinuz-" | sort -r | head -n1)"
-vmlinuz_version="$(echo $vmlinuz | sed -e 's/vmlinuz-\(.*\)/\1/')"
+vmlinuz_version="$(printf "%s" $vmlinuz | sed -e 's/vmlinuz-\(.*\)/\1/')"
 
 # Create the gummiboot configuration file
 mkdir -p "$boot_mountpoint/loader"