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-rwxr-xr-xmkarchroot29
1 files changed, 24 insertions, 5 deletions
diff --git a/mkarchroot b/mkarchroot
index ac05a6b..f385731 100755
--- a/mkarchroot
+++ b/mkarchroot
@@ -26,7 +26,7 @@ usage() {
echo ' -C <file> Location of a pacman config file'
echo ' -M <file> Location of a makepkg config file'
echo ' -n Do not copy config files into the chroot'
- echo " -c <dir> Set pacman cache. Default: /var/cache/pacman/pkg"
+ echo ' -c <dir> Set pacman cache. Default: /var/cache/pacman/pkg'
echo ' -h This message'
exit $1
}
@@ -68,7 +68,7 @@ shift 1
if [ -z "$cache_dir" ]; then
cache_conf=${working_dir}/etc/pacman.conf
[ ! -f $cache_conf ] && cache_conf=${pac_conf:-/etc/pacman.conf}
- cache_dir=$((grep -m 1 '^CacheDir' $cache_conf || echo 'CacheDir = /var/cache/pacman/pkg') | sed 's/CacheDir\s*=\s*//')
+ cache_dir=$( (grep -m 1 '^CacheDir' $cache_conf || echo 'CacheDir = /var/cache/pacman/pkg') | sed 's/CacheDir\s*=\s*//')
unset cache_conf
fi
@@ -82,8 +82,7 @@ if echo "${host_mirror}" | grep -q 'file://'; then
host_mirror_path=$(echo "${host_mirror}" | sed -E 's#file://(/.*)/\$repo/os/\$arch#\1#g')
fi
-# {{{ functions
-
+# {{{ functions
chroot_mount() {
[ -e "${working_dir}/sys" ] || mkdir "${working_dir}/sys"
mount -t sysfs sysfs "${working_dir}/sys"
@@ -142,6 +141,20 @@ chroot_umount () {
umount "${working_dir}/${cache_dir}"
[ -n "${host_mirror_path}" ] && umount "${working_dir}/${host_mirror_path}"
}
+
+chroot_lock () {
+ # Only reopen the FD if it wasn't handed to us
+ if [ "$(readlink -f /dev/fd/9)" != "${working_dir}.lock" ]; then
+ exec 9>"${working_dir}.lock"
+ fi
+
+ # Lock the chroot. Take note of the FD number.
+ if ! flock -n 9; then
+ echo -n "locking chroot..."
+ flock 9
+ echo "done"
+ fi
+}
# }}}
umask 0022
@@ -154,22 +167,28 @@ if [ "$RUN" != "" ]; then
exit 1
fi
+ chroot_lock
chroot_mount
copy_hostconf
eval chroot "${working_dir}" ${RUN}
# }}}
- else
+else
# {{{ build chroot
if [ -e "${working_dir}" -a "${FORCE}" = "n" ]; then
echo "error: working dir '${working_dir}' already exists - try using -f"
exit 1
fi
+ if { type -P btrfs && btrfs subvolume create "${working_dir}"; } &>/dev/null; then
+ chmod 0755 "${working_dir}"
+ fi
+
mkdir -p "${working_dir}/var/lib/pacman/sync"
mkdir -p "${working_dir}/etc/"
+ chroot_lock
chroot_mount
pacargs="--noconfirm --root=${working_dir} --cachedir=${cache_dir}"