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137 lines
3.4 KiB
137 lines
3.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later
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// UCI tools for uvol
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// (c) 2022 Daniel Golle <daniel@makrotopia.org>
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let uci_spooldir = "/var/spool/uvol";
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let init_spooldir = function(void) {
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parentdir = fs.stat(fs.dirname(uci_spooldir));
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if (!parentdir || parentdir.type != "directory")
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fs.mkdir(fs.dirname(uci_spooldir), 0755);
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fs.mkdir(uci_spooldir, 0700);
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};
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uvol_uci = {
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uvol_uci_add: function(vol_name, dev_name, mode) {
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try {
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let autofs = false;
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let uuid;
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let target;
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if (mode == "ro")
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autofs = true;
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let uciname = replace(vol_name, /[-.]/g, "_");
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uciname = replace(uciname, /!([:alnum:]_)/g, "");
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let bdinfo_p = fs.popen("/sbin/block info");
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let bdinfo_l;
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while (bdinfo_l = bdinfo_p.read("line")) {
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if (substr(bdinfo_l, 0, length(dev_name) + 1) != dev_name + ":")
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continue;
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let bdinfo_e = split(bdinfo_l, " ");
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shift(bdinfo_e);
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for (let bdinfo_a in bdinfo_e) {
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let bdinfo_v = split(bdinfo_a, "=");
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if (bdinfo_v[0] && bdinfo_v[0] == "UUID") {
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uuid = trim(bdinfo_v[1], "\"");
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break;
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}
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}
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break;
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}
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if (!uuid)
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return 22;
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if (uciname == "_meta")
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target = "/tmp/run/uvol/.meta";
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else if (substr(uciname, 0, 1) == "_")
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return 1;
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else
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target = sprintf("/tmp/run/uvol/%s", vol_name);
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init_spooldir();
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let remspool = sprintf("%s/remove-%s", uci_spooldir, uciname);
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if (fs.stat(remspool))
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fs.unlink(remspool);
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let addobj = {};
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addobj.name=uciname;
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addobj.uuid=uuid;
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addobj.target=target;
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addobj.options=mode;
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addobj.autofs=autofs;
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addobj.enabled=true;
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let spoolfile = fs.open(sprintf("%s/add-%s", uci_spooldir, uciname), "w");
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spoolfile.write(addobj);
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spoolfile.close();
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} catch(e) {
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printf("adding UCI section to spool failed");
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return -1;
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}
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return 0;
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},
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uvol_uci_remove: function(vol_name) {
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let uciname = replace(vol_name, /[-.]/g, "_");
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uciname = replace(uciname, /!([:alnum:]_)/g, "");
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let addspool = sprintf("%s/add-%s", uci_spooldir, uciname);
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if (fs.stat(addspool)) {
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fs.unlink(addspool);
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return 0;
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}
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init_spooldir();
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let spoolfile = fs.open(sprintf("%s/remove-%s", uci_spooldir, uciname), "w");
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spoolfile.write(uciname);
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spoolfile.close();
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return 0;
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},
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uvol_uci_commit: function(vol_name) {
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try {
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let uciname = null;
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if (vol_name) {
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uciname = replace(vol_name, /[-.]/g, "_");
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uciname = replace(uciname, /!([:alnum:]_)/g, "");
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}
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for (let file in fs.glob(sprintf("%s/*-%s", uci_spooldir, uciname?uciname:"*"))) {
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let action = split(fs.basename(file), "-")[0];
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let spoolfd = fs.open(file, "r");
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let spoolstr = spoolfd.read("all");
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spoolfd.close();
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fs.unlink(file);
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if (action == "remove") {
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cursor.delete("fstab", spoolstr);
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} else if (action == "add") {
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let spoolobj = json(spoolstr);
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cursor.set("fstab", spoolobj.name, "mount");
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for (key in keys(spoolobj)) {
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if (key == "name")
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continue;
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cursor.set("fstab", spoolobj.name, key, spoolobj[key]);
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}
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}
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}
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cursor.commit();
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} catch(e) {
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printf("committing UCI spool failed");
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return -1;
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}
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return 0;
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},
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uvol_uci_init: function () {
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cursor.load("fstab");
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let f = cursor.get("fstab", "@uvol[0]", "initialized");
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if (f == 1)
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return 0;
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cursor.add("fstab", "uvol");
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cursor.set("fstab", "@uvol[-1]", "initialized", true);
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cursor.commit();
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cursor.unload("fstab");
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return 0;
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}
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};
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