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From 827ca9237044f4821eb442fee1eef07ec7c3448c Mon Sep 17 00:00:00 2001
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From: Lars Kellogg-Stedman <lars@redhat.com>
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Date: Thu, 6 Dec 2018 15:32:35 -0500
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Subject: [PATCH] growpart: fix bug occurring if start sector and size were the
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same.
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The existing sed expression would erroneously change the start sector
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of a partition, rather than the size, if the start sector and size
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were identical. This commit modifies the sed expression so that it
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will only operate on the final match in the line.
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bzr-revno: 338.1.1
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(cherry picked from commit 7b11ac4d3abe16525639cff9198f5e7f8303280b)
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---
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bin/growpart | 2 +-
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test/test-growpart-start-matches-size | 75 +++++++++++++++++++++++++++
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2 files changed, 76 insertions(+), 1 deletion(-)
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create mode 100755 test/test-growpart-start-matches-size
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diff --git a/bin/growpart b/bin/growpart
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index 13eda6e..4069fd4 100755
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--- a/bin/growpart
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+++ b/bin/growpart
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@@ -314,7 +314,7 @@ resize_sfdisk() {
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# now, change the size for this partition in ${dump_out} to be the
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# new size
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new_size=$((${max_end}-${pt_start}))
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- sed "\|^\s*${dpart} |s/${pt_size},/${new_size},/" "${dump_out}" \
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+ sed "\|^\s*${dpart} |s/\(.*\)${pt_size},/\1${new_size},/" "${dump_out}" \
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>"${new_out}" ||
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fail "failed to change size in output"
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diff --git a/test/test-growpart-start-matches-size b/test/test-growpart-start-matches-size
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new file mode 100755
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index 0000000..9967827
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--- /dev/null
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+++ b/test/test-growpart-start-matches-size
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@@ -0,0 +1,75 @@
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+#!/bin/bash
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+#
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+# Create a disk image where there exists a partition whose sizes matches the
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+# start sector.
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+# brought up under bug 1807171, which describes an error in the sed expression
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+# used to generate the replacement partition map
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+
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+set -e
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+
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+TEMP_D=""
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+
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+rq() {
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+ local out="${TEMP_D}/out"
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+ "$@" > "$out" 2>&1 || { echo "FAILED:" "$@"; cat "$out"; return 1; }
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+}
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+fail() { echo "FAILED:" "$@" 1>&2; exit 1; }
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+
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+setup_img() {
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+ local img_fp="$1" img=""
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+ img=$(basename "$img_fp")
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+ sfdisk "${img_fp}" <
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+label: gpt
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+label-id: db24000c-6ef3-4a17-b71c-1064baa29514
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+device: ${img}
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+unit: sectors
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+first-lba: 2048
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+last-lba: 4194270
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+
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+${img}1 : start= 2048, size= 1024000, type=C12A7328-F81F-11D2-BA4B-00A0C93EC93B, uuid=5bc16165-bfc0-4e13-94eb-b898dc0bca41
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+${img}2 : start= 1026048, size= 1026048, type=4F68BCE3-E8CD-4DB1-96E7-FBCAF984B709, uuid=a0e1636e-b759-4e7a-bd14-6f3d6c04745d
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+EOF
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+}
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+
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+cleanup() {
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+ [ ! -d "${TEMP_D}" ] || rm -Rf "${TEMP_D}"
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+}
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+TEMP_D=$(mktemp -d ${TMPDIR:-/tmp}/${0##*/}.XXXXXX)
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+trap cleanup EXIT
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+
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+expected_sfdisk="CHANGED: partition=2 start=1026048 old: size=1026048 end=2052096 new: size=3168223 end=4194271"
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+expected_sgdisk="CHANGED: partition=2 start=1026048 old: size=1026048 end=2052096 new: size=3166208 end=4192256"
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+CR='
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+'
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+for resizer in sfdisk sgdisk; do
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+ expected_var_name="expected_$resizer"
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+ expected="${!expected_var_name}"
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+
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+ img="${TEMP_D}/disk-$resizer.img"
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+ echo "====== Testing with resizer=$resizer ====="
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+ rq truncate "--size=2G" "$img"
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+ ( cd ${TEMP_D} && rq setup_img "${img##*/}" ) || fail "setup image $img"
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+ echo "==== before ===="
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+ ( cd "${TEMP_D}" && sfdisk --dump "${img##*/}" )
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+ err="${TEMP_D}/gp.err"
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+ out="${TEMP_D}/gp.out"
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+ if ! GROWPART_RESIZER=$resizer \
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+ growpart -v -v "$img" 2 2>"$err" > "$out"; then
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+ cat "$err" "$out"
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+ fail "[resizer=$resizer] growpart failed"
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+ fi
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+ echo "==== after ===="
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+ ( cd "${TEMP_D}" && sfdisk --dump "${img##*/}" )
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+ echo
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+ echo "==== after sgdisk ==="
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+ ( cd "${TEMP_D}" && sgdisk --print "${img##*/}" )
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+ echo "==== growpart-stderr ==="
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+ cat "$err"
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+ echo "==== growpart-stdout ===="
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+ cat "$out"
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+ [ "$(cat $out)" = "$expected" ] || {
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+ fail "[resizer=$resizer] output ^^^ did not match expected vvv:${CR}$expected"
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+ }
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+done
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+
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+# vi: ts=4 noexpandtab
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--
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2.17.2
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