lxc-alpine: fixes for checkbashism

Fix the issues reported by checkbashisms and change back to #!/bin/sh

Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

diff --git a/templates/lxc-alpine.in b/templates/lxc-alpine.in
index 5c4c585060b917f3abdf2fa7660b699c87320ec8..459428dad32c918c6c94245c35c41050368db7e7 100644 (file)
--- a/templates/lxc-alpine.in
+++ b/templates/lxc-alpine.in
@@ -1,9 +1,9 @@
-#!/bin/bash
+#!/bin/sh
 
 # Detect use under userns (unsupported)
 for arg in "$@"; do
-    [ "$arg" == "--" ] && break
-    if [ "$arg" == "--mapped-uid" -o "$arg" == "--mapped-gid" ]; then
+    [ "$arg" = "--" ] && break
+    if [ "$arg" = "--mapped-uid" -o "$arg" = "--mapped-gid" ]; then
         echo "This template can't be used for unprivileged containers." 1>&2
         echo "You may want to try the \"download\" template instead." 1>&2
         exit 1
@@ -11,7 +11,8 @@ for arg in "$@"; do
 done
 
 # Make sure the usual locations are in PATH
-export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
+PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
+export PATH
 
 key_sha256sums="9c102bcc376af1498d549b77bdbfa815ae86faa1d2d82f040e616b18ef2df2d4  alpine-devel@lists.alpinelinux.org-4a6a0840.rsa.pub
 2adcf7ce224f476330b5360ca5edb92fd0bf91c92d83292ed028d7c4e26333ab  alpine-devel@lists.alpinelinux.org-4d07755e.rsa.pub"
@@ -79,7 +80,8 @@ get_static_apk () {
     if [ "$auto_repo_dir" ]; then
         mirror_list=$rootfs/usr/share/alpine-mirrors/MIRRORS.txt
         mirror_count=$(wc -l $mirror_list | cut -d " " -f 1)
-        repository=$(sed $(expr $RANDOM % $mirror_count + 1)\!d \
+        random=$(hexdump -n 2 -e '/2 "%u"' /dev/urandom)
+        repository=$(sed $(expr $random % $mirror_count + 1)\!d \
             $mirror_list)$auto_repo_dir
         echo "Selecting mirror $repository"
     fi