Read /etc/fstab to determine data partition

Rather than hard-code the GPT partition label into the `init-storage`
and `factory-reset` scripts, these now determine the block device by
reading `/etc/fstab` and using the device specified for `/var`.

overlay/usr/libexec/factory-reset

@@ -1,7 +1,7 @@
 #!/bin/sh
 # vim: set sw=4 ts=4 sts=4 et :
 
-DATAPART=PARTLABEL=dch-data
+DATAPART=$(awk '$2=="/var"{print $1}' /etc/fstab)
 
 seq 1 30
 

overlay/usr/libexec/init-storage

@@ -71,7 +71,7 @@ setup_etc() {
     umount "${tmpdir}"
 }
 
-datapart=$(findfs PARTLABEL=dch-data)
+datapart=$(findfs $(awk '$2=="/var"{print $1}' /etc/fstab))
 if [ -b "${datapart}" ]; then
     printf 'Found data partition: %s\n' "${datapart}"
 else

repos/aimee-os/sec-policy/selinux-aimee-os/files/aimee-os.te

@@ -45,6 +45,7 @@ files_runtime_filetrans(aimee_storinit_t, aimee_storinit_runtime_t, dir)
 
 corecmd_exec_bin(aimee_storinit_t)
 
+files_read_etc_files(aimee_storinit_t)
 storage_raw_read_fixed_disk(aimee_storinit_t)
 fstools_domtrans(aimee_storinit_t)
 mount_exec(aimee_storinit_t)
@@ -201,6 +202,7 @@ allow aimee_factory_reset_t self:fifo_file rw_fifo_file_perms;
 corecmd_exec_bin(aimee_factory_reset_t)
 dev_read_sysfs(aimee_factory_reset_t)
 kernel_read_system_state(aimee_factory_reset_t)
+files_read_etc_files(aimee_factory_reset_t)
 fstools_exec(aimee_factory_reset_t)
 fstools_manage_runtime_files(aimee_factory_reset_t)
 miscfiles_read_localization(aimee_factory_reset_t)