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# Copyright (C) 2011 Canonical Ltd.
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# Authors: Scott Moser <smoser@canonical.com>
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 3 of the License.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# the fudge factor. if its within this many 512 byte sectors, dont bother
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FUDGE=${GROWPART_FUDGE:-$((20*1024))}
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error() { echo "$@" 1>&2; }
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fail() { [ $# -eq 0 ] || echo "FAILED:" "$@"; exit 1; }
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nochange() { echo "NOCHANGE:" "$@"; exit 0; }
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changed() { echo "CHANGED:" "$@"; exit 0; }
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if [ -n "${RESTORE_FROM}" ]; then
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error "***** WARNING: Resize failed, attempting to revert ******"
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if sfdisk "${DISK}" ${CHS} -I "${RESTORE_FROM}"; then
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error "***** Appears to have gone OK ****"
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error "***** FAILED! or original partition table looked like: ****"
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cat "${RESTORE_HUMAN}" 1>&2
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[ -z "${TEMP_D}" -o ! -d "${TEMP_D}" ] || rm -Rf "${TEMP_D}"
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local level=${1}; shift;
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[ "${level}" -gt "${VERBOSITY}" ] && return
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# just a mktemp -d that doens't need mktemp if its not there.
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_RET=$(mktemp -d "${TMPDIR:-/tmp}/${0##*/}.XXXXXX" 2>/dev/null) && return
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_RET=$(umask 077 && t="${TMPDIR:-/tmp}/${0##*/}.$$" && mkdir "${t}" &&
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${0##*/} disk partition
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rewrite partition table so that partition takes up all the space it can
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-h | --help print Usage an exit
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--fudge F if part could be resized, but change would be
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less than 'F', do not resize (default: ${FUDGE})
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-N | --dry-run only report what would be done, show new 'sfdisk -d'
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-v | --verbose increase verbosity / debug
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Resize partition 1 on /dev/sda
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bad_Usage() { Usage 1>&2; error "$@"; exit 1; }
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#long_opts="help,dry-run,fudge:,verbose"
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#getopt_out=$(getopt --name "${0##*/}" \
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# --options "${short_opts}" --long "${long_opts}" -- "$@") &&
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# eval set -- "${getopt_out}" ||
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while [ $# -ne 0 ]; do
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-h|--help) Usage; exit 0;;
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--fudge) fudge=${next}; shift;;
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--dry-run) dry_run=1;;
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-v|--verbose) VERBOSITY=$(($VERBOSITY+1));;
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-*) fail "unknown option ${cur}";;
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if [ -z "${disk}" ]; then
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[ -z "${part}" ] || fail "confused by arg ${cur}"
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[ -n "${disk}" ] || bad_Usage "must supply disk and partition-number"
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[ -n "${part}" ] || bad_Usage "must supply partition-number"
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[ -e "${disk}" ] || { fail "${disk}: does not exist"; }
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[ "${part#*[!0-9]}" = "${part}" ] || fail "partition-number must be a number"
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mktemp_d && TEMP_D="${_RET}" || fail "failed to make temp dir"
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change_out=${TEMP_D}/change.out
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change_err=${TEMP_D}/change.err
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dump_out=${TEMP_D}/dump.out
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new_out=${TEMP_D}/new.out
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dump_mod=${TEMP_D}/dump.mod
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tmp="${TEMP_D}/tmp.out"
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err="${TEMP_D}/err.out"
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orig_bin="${TEMP_D}/orig.save"
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RESTORE_HUMAN="${TEMP_D}/recovery"
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# --show-pt-geometry outputs something like
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# /dev/sda: 164352 cylinders, 4 heads, 32 sectors/track
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sfdisk "${disk}" --show-pt-geometry > "${tmp}" 2>"${err}" &&
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read _devc cyl _word1 heads _word2 sectors _word3 < "${tmp}" &&
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CHS="-C $cyl -H $heads -S $sectors" ||
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fail "failed to get CHS from ${disk}"
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tot=$((${cyl}*${heads}*${sectors}))
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debug 1 "geometry is $CHS. total size=${tot}"
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sfdisk ${CHS} -uS -d "${disk}" > "${dump_out}" 2>"${err}" ||
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fail "failed to dump sfdisk info for ${disk}"
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echo "## sfdisk ${CHS} -uS -d ${disk}";
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} > "${RESTORE_HUMAN}"
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[ $? -eq 0 ] || fail "failed to save sfdisk -d output"
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sed -e 's/,//g; s/start=/start /; s/size=/size /' "${dump_out}" > "${dump_mod}"
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dpart="${disk}${part}" # disk and partition number
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pt_start=$(awk '$1 == pt { print $4 }' "pt=${dpart}" < "${dump_mod}") &&
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pt_size=$(awk '$1 == pt { print $6 }' "pt=${dpart}" < "${dump_mod}") &&
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[ -n "${pt_start}" -a -n "${pt_size}" ] &&
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pt_end=$((${pt_size}+${pt_start})) ||
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fail "failed to get start and end for ${dpart} in ${disk}"
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# find the minimal starting location that is >= pt_end
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$3 == "start" { if($4 >= pt_end && $4 < min) { min = $4 } }
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END { printf("%s\n",min); }' \
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min=${tot} pt_end=${pt_end} "${dump_mod}") &&
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[ -n "${max_end}" ] ||
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fail "failed to get max_end for partition ${part}"
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debug 1 "max_end=${max_end} tot=${tot} pt_end=${pt_end} pt_start=${pt_start} pt_size=${pt_size}"
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[ $((${pt_end})) -eq ${max_end} ] &&
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nochange "partition ${part} is size ${pt_size}. it cannot be grown"
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[ $((${pt_end}+${fudge})) -gt ${max_end} ] &&
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nochange "partition ${part} could only be grown by $((${max_end}-${pt_end})) [fudge=${fudge}]"
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# now, change the size for this partition in ${dump_out} to be the
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new_size=$((${max_end}-${pt_start}))
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sed "\|^${dpart} |s/${pt_size},/${new_size},/" "${dump_out}" > "${new_out}" ||
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fail "failed to change size in output"
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change_info="partition=${part} start=${pt_start} old: size=${pt_size} end=${pt_end} new: size=${new_size},end=${max_end}"
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if [ $dry_run -ne 0 ]; then
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echo "CHANGE: ${change_info}"
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echo "# === old sfdisk -d ==="
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echo "# === new sfdisk -d ==="
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sfdisk "${disk}" ${CHS} --force -O "${orig_bin}" \
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< "${new_out}" > "${change_out}" 2> "${change_err}" || {
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DISK=${disk}; RESTORE_FROM="${orig_bin}";
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fail "failed to resize"
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changed "${change_info}"
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# dump_out looks something like:
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## partition table of /tmp/out.img
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#/tmp/out.img1 : start= 1, size= 48194, Id=83
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#/tmp/out.img2 : start= 48195, size= 963900, Id=83
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#/tmp/out.img3 : start= 1012095, size= 305235, Id=82
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#/tmp/out.img4 : start= 1317330, size= 771120, Id= 5
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#/tmp/out.img5 : start= 1317331, size= 642599, Id=83
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#/tmp/out.img6 : start= 1959931, size= 48194, Id=83
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#/tmp/out.img7 : start= 2008126, size= 80324, Id=83
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# vi: ts=4 noexpandtab
added
removed
.pc/growpart-show-sfdisk-error-output.patch/bin/growpart
