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|
# vim: filetype=sh
# basic routines
# --------------
missing_or_empty()
{
f="$1"
if [ ! -e "$f" ]
then
echo 1
return
else
if [ "$(cat "$f" | wc -l)" -eq 0 ]
then
echo 1
return
fi
fi
echo 0
}
num_dir_entries() {
d="$1"
if [ ! -d "$d" ]
then
echo 0
else
ls -1 "$d" | wc -l
fi
}
abspath()
{
echo "$(cd "$(dirname "$1")" && pwd)/$(basename "$1")"
}
print_last_word()
{
awk '{print $NF}'
}
# divide %1/%2 rounding up
ceil()
{
divide=$1
by=$2
echo $(((divide+by-1)/by))
}
estimated_size_mb()
{
du -sm "$1" | awk '{print $1}'
}
real_size_human_readable()
{
du -sh --apparent-size "$1" | awk '{print $1}'
}
device_size_mb()
{
size_b=$(blockdev --getsize64 $1)
echo $((size_b/1024/1024))
}
size_as_mb()
{
echo $(($(echo $1 | sed -e "s/M//" -e "s/G/*1024/")))
}
check_integer() {
case "$1" in
''|*[!0-9]*)
return 1 ;; # not a number
*)
return 0 ;; # number
esac
}
sum_lines() {
exp="$(paste -sd+ -)"
[ "$exp" = "" ] && echo 0 || echo "$(($exp))"
}
# grep returns non-zero if no line is found.
# in some cases, having no line is expected
# (e.g. in the case of error lines)
# thus the or-true construct.
happy_grep()
{
grep "$@" || true
}
# get total size needed taking into account
# an overhead.
# $1: the initial size (not taking the overhead into account)
# $2: percent of overhead
# return value: the size needed (such that applying the
# overhead would get $1 again)
apply_overhead_percent()
{
echo $((($1)*100/(100-($2))))
}
quiet()
{
$* >/dev/null
}
wait_for_device()
{
while [ ! -e "$1" ]
do
sleep 0.1
done
}
get_vg_name()
{
case "$1" in
"draft")
echo "DRAFT_$2"
;;
"final")
echo "DBSTCK_$2"
;;
esac
}
get_rootfs_uuid()
{
image_name="$1" # final or draft
cat $DBSTCK_TMPDIR/$image_name/rootfs_vol/uuid
}
|
