fail(function(ex) {
/* The journalctl command fails when no entries are matched
* so we just ignore this status code */
if (ex.problem == "cancelled" ||
ex.exit_status === 1) {
fire_streamers();
dfd.resolve(entries);
} else {
dfd.reject(ex);
}
}).
journal.journalctl = function journalctl(/* ... */) {
var matches = [];
var i, arg, options = { follow: true };
for (i = 0; i < arguments.length; i++) {
arg = arguments[i];
if (typeof arg == "string") {
matches.push(arg);
} else if (typeof arg == "object") {
if (arg instanceof Array) {
matches.push.apply(matches, arg);
} else {
cockpit.extend(options, arg);
break;
}
} else {
console.warn("journal.journalctl called with invalid argument:", arg);
}
}
if (options.count === undefined) {
if (options.follow)
options.count = 10;
else
options.count = null;
}
var cmd = [ "journalctl", "-q", "--output=json" ];
if (!options.count)
cmd.push("--no-tail");
else
cmd.push("--lines=" + options.count);
if (options.directory)
cmd.push("--directory=" + options.directory);
if (options.boot)
cmd.push("--boot=" + options.boot);
else if (options.boot !== undefined)
cmd.push("--boot");
if (options.since)
cmd.push("--since=" + options.since);
if (options.until)
cmd.push("--until=" + options.until);
if (options.cursor)
cmd.push("--cursor=" + options.cursor);
if (options.after)
cmd.push("--after=" + options.after);
/* journalctl doesn't allow reverse and follow together */
if (options.reverse)
cmd.push("--reverse");
else if (options.follow)
cmd.push("--follow");
cmd.push("--");
cmd.push.apply(cmd, matches);
var dfd = new cockpit.defer();
var promise;
var buffer = "";
var entries = [];
var streamers = [];
var interval = null;
function fire_streamers() {
var ents, i;
if (streamers.length && entries.length > 0) {
ents = entries;
entries = [];
for (i = 0; i < streamers.length; i++)
streamers[i].apply(promise, [ents]);
} else {
window.clearInterval(interval);
interval = null;
}
}
var proc = cockpit.spawn(cmd, { host: options.host, batch: 8192, latency: 300, superuser: "******" }).
stream(function(data) {
if (buffer)
data = buffer + data;
buffer = "";
var lines = data.split("\n");
var last = lines.length - 1;
lines.forEach(function(line, i) {
if (i == last) {
buffer = line;
} else if (line && line.indexOf("-- ") !== 0) {
try {
entries.push(JSON.parse(line));
} catch (e) {
console.warn(e, line);
}
}
});
if (streamers.length && interval === null)
interval = window.setInterval(fire_streamers, 300);
}).
done(function() {
fire_streamers();
dfd.resolve(entries);
}).
fail(function(ex) {
/* The journalctl command fails when no entries are matched
* so we just ignore this status code */
if (ex.problem == "cancelled" ||
ex.exit_status === 1) {
fire_streamers();
dfd.resolve(entries);
} else {
dfd.reject(ex);
}
}).
always(function() {
window.clearInterval(interval);
});
promise = dfd.promise();
promise.stream = function stream(callback) {
streamers.push(callback);
return this;
};
promise.stop = function stop() {
proc.close("cancelled");
};
return promise;
};
done(function() {
fire_streamers();
dfd.resolve(entries);
}).