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-rw-r--r--scripts/repo-add.sh.in38
1 files changed, 26 insertions, 12 deletions
diff --git a/scripts/repo-add.sh.in b/scripts/repo-add.sh.in
index 280c0240..fd05b48b 100644
--- a/scripts/repo-add.sh.in
+++ b/scripts/repo-add.sh.in
@@ -640,37 +640,51 @@ if (( success )); then
msg "$(gettext "Creating updated database file '%s'")" "$REPO_DB_FILE"
TAR_OPT=$(verify_repo_extension "$REPO_DB_FILE")
+ # $LOCKFILE is already guaranteed to be absolute so this is safe
+ dirname=${LOCKFILE%/*}
filename=${REPO_DB_FILE##*/}
+ # this ensures we create it on the same filesystem, making moves atomic
+ tempname="$dirname/.tmp.$filename"
pushd "$tmpdir/tree" >/dev/null
if ( shopt -s nullglob; files=(*); (( ${#files[*]} )) ); then
- bsdtar -c${TAR_OPT}f "$tmpdir/$filename" *
+ bsdtar -c${TAR_OPT}f "$tempname" *
else
# we have no packages remaining? zip up some emptyness
warning "$(gettext "No packages remain, creating empty database.")"
- bsdtar -c${TAR_OPT}f "$tmpdir/$filename" -T /dev/null
+ bsdtar -c${TAR_OPT}f "$tempname" -T /dev/null
fi
popd >/dev/null
- create_signature "$tmpdir/$filename"
+ create_signature "$tempname"
- [[ -f $REPO_DB_FILE ]] && mv -f "$REPO_DB_FILE" "${REPO_DB_FILE}.old"
+ # hardlink or move the previous version of the database and signature to .old
+ # extension as a backup measure
+ if [[ -f $REPO_DB_FILE ]]; then
+ ln -f "$REPO_DB_FILE" "$REPO_DB_FILE.old" 2>/dev/null || \
+ mv -f "$REPO_DB_FILE" "$REPO_DB_FILE.old"
+ fi
if [[ -f $REPO_DB_FILE.sig ]]; then
- mv -f "$REPO_DB_FILE.sig" "$REPO_DB_FILE.old.sig"
+ ln -f "$REPO_DB_FILE.sig" "$REPO_DB_FILE.old.sig" 2>/dev/null || \
+ mv -f "$REPO_DB_FILE.sig" "$REPO_DB_FILE.old.sig"
else
rm -f "$REPO_DB_FILE.old.sig"
fi
- [[ -f $tmpdir/$filename ]] && mv "$tmpdir/$filename" "$REPO_DB_FILE"
- [[ -f $tmpdir/$filename.sig ]] && mv "$tmpdir/$filename.sig" "$REPO_DB_FILE.sig"
+
+ # rotate the newly-created database and signature into place
+ mv "$tempname" "$REPO_DB_FILE"
+ if [[ -f $tempname.sig ]]; then
+ mv "$tempname.sig" "$REPO_DB_FILE.sig"
+ fi
+
dblink="${REPO_DB_FILE%.tar*}"
- target=${REPO_DB_FILE##*/}
rm -f "$dblink" "$dblink.sig"
- ln -s "$target" "$dblink" 2>/dev/null || \
- ln "$target" "$dblink" 2>/dev/null || \
+ ln -s "$filename" "$dblink" 2>/dev/null || \
+ ln "$filename" "$dblink" 2>/dev/null || \
cp "$REPO_DB_FILE" "$dblink"
if [[ -f "$REPO_DB_FILE.sig" ]]; then
- ln -s "$target.sig" "$dblink.sig" 2>/dev/null || \
- ln "$target.sig" "$dblink.sig" 2>/dev/null || \
+ ln -s "$filename.sig" "$dblink.sig" 2>/dev/null || \
+ ln "$filename.sig" "$dblink.sig" 2>/dev/null || \
cp "$REPO_DB_FILE.sig" "$dblink.sig"
fi
else