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-rw-r--r--lib/block.sh92
1 files changed, 92 insertions, 0 deletions
diff --git a/lib/block.sh b/lib/block.sh
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+++ b/lib/block.sh
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+# Functions for mounting and unmounting block devices
+#
+# Copyright (C) 2015 Patrick "P. J." McDermott
+#
+# This file is part of the ProteanOS Development Kit.
+#
+# The ProteanOS Development Kit is free software: you can redistribute
+# it and/or modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# The ProteanOS Development Kit is distributed in the hope that it
+# will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with the ProteanOS Development Kit. If not, see
+# <http://www.gnu.org/licenses/>.
+
+[ "x${_BLOCK_SM+set}" = 'xset' ] && return 0
+_BLOCK_SM=1
+
+use rand
+use vardata
+
+is_block()
+{
+ local dev="${1}"
+
+ [ -b "${dev}" ]
+ return ${?}
+}
+
+check_block()
+{
+ local dev="${1}"
+
+ if ! [ -b "${dev}" ]; then
+ error 2 "$(get_msg 'block_device_invalid')" "${dev}"
+ fi
+}
+
+block_mount()
+{
+ local dev="${1}"
+ local dir=
+
+ check_block "${dev}"
+
+ rand
+ dir="$(get_vardata_dir 'mount')/block-$(printf '%010d' ${rand_x})"
+ if ! mkdir "${dir}"; then
+ error 2 "$(get_msg 'block_mkdir_fail')" "${dir}"
+ fi
+
+ if ! mount "${dev}" "${dir}"; then
+ rmdir "${dir}"
+ error 2 "$(get_msg 'block_mount_fail')" "${dev}"
+ fi
+
+ printf '%s' "${dir}"
+ return 0
+}
+
+block_umount()
+{
+ local dir="${1}"
+ local i=
+ local timed_out=
+
+ i=0
+ timed_out=false
+ while ! umount "${dir}"; do
+ i=$(($i + 1))
+ if [ ${i} -eq 10 ]; then
+ timed_out=true
+ break
+ fi
+ sleep 1
+ done
+
+ if ${timed_out}; then
+ error 2 "$(get_msg 'block_umount_fail')" "${dir}"
+ fi
+
+ if ! rmdir "${dir}"; then
+ error 2 "$(get_msg 'block_rmdir_fail')" "${dir}"
+ fi
+
+ return 0
+}