Github user danobi commented on a diff in the pull request:
https://github.com/apache/trafficserver/pull/274#discussion_r36781403
--- Diff: lib/ts/BaseLogFile.cc ---
@@ -0,0 +1,571 @@
+/** @file
+
+ Base class for log files implementation
+
+ @section license License
+
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements. See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership. The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+#include "BaseLogFile.h"
+
+/*
+ * This consturctor creates a BaseLogFile based on a given name.
+ * This is the most common way BaseLogFiles are created.
+ */
+BaseLogFile::BaseLogFile(const char *name)
+ : m_name(ats_strdup(name)), m_hostname(NULL), m_is_regfile(false),
m_has_signature(false), m_signature(0), m_is_init(false)
+{
+ m_fp = NULL;
+ m_start_time = time(0);
+ m_end_time = 0L;
+ m_bytes_written = 0;
+ m_meta_info = NULL;
+
+ log_log_trace("exiting BaseLogFile constructor, m_name=%s, this=%p\n",
m_name, this);
+}
+
+/*
+ * This consturctor creates a BaseLogFile based on a given name.
+ * Similar to above constructor, but is overloaded with the object
signature
+ */
+BaseLogFile::BaseLogFile(const char *name, uint64_t sig)
+ : m_name(ats_strdup(name)), m_hostname(NULL), m_is_regfile(false),
m_has_signature(true), m_signature(sig), m_is_init(false)
+{
+ m_fp = NULL;
+ m_start_time = time(0);
+ m_end_time = 0L;
+ m_bytes_written = 0;
+ m_meta_info = NULL;
+
+ log_log_trace("exiting BaseLogFile constructor, m_name=%s, this=%p\n",
m_name, this);
+}
+
+/*
+ * This copy constructor creates a BaseLogFile based on a given copy.
+ */
+BaseLogFile::BaseLogFile(const BaseLogFile ©)
+ : m_fp(NULL), m_start_time(copy.m_start_time), m_end_time(0L),
m_bytes_written(0), m_name(ats_strdup(copy.m_name)),
+ m_hostname(ats_strdup(m_hostname)), m_is_regfile(false),
m_has_signature(copy.m_has_signature), m_signature(copy.m_signature),
+ m_is_init(copy.m_is_init), m_meta_info(NULL)
+{
+ log_log_trace("exiting BaseLogFile copy constructor, m_name=%s,
this=%p\n", m_name, this);
+}
+
+/*
+ * Destructor.
+ */
+BaseLogFile::~BaseLogFile()
+{
+ log_log_trace("entering BaseLogFile destructor, m_name=%s, this=%p\n",
m_name, this);
+
+ if (m_is_regfile)
+ close_file();
+ else
+ log_log_trace("not a regular file, not closing, m_name=%s, this=%p\n",
m_name, this);
+ if (m_name)
+ ats_free(m_name);
+ if (m_hostname)
+ ats_free(m_hostname);
+
+ log_log_trace("exiting BaseLogFile destructor, this=%p\n", this);
+}
+
+/*
+ * This function is called by a client of BaseLogFile to roll the
underlying
+ * file The tricky part to this routine is in coming up with the new file
name,
+ * which contains the bounding timestamp interval for the entries
+ * within the file.
+
+ * Under normal operating conditions, this BaseLogFile object was in
existence
+ * for all writes to the file. In this case, the LogFile members
m_start_time
+ * and m_end_time will have the starting and ending times for the actual
+ * entries written to the file.
+
+ * On restart situations, it is possible to re-open an existing
BaseLogFile,
+ * which means that the m_start_time variable will be later than the actual
+ * entries recorded in the file. In this case, we'll use the creation time
+ * of the file, which should be recorded in the meta-information located on
+ * disk.
+
+ * If we can't use the meta-file, either because it's not there or because
+ * it's not valid, then we'll use timestamp 0 (Jan 1, 1970) as the starting
+ * bound.
+
+ * Return 1 if file rolled, 0 otherwise
+ */
+int
+BaseLogFile::roll(long interval_start, long interval_end)
--- End diff --
It was originally like that in LogFile.cc. I assume for reasons related to
the `snprintf()` calls later.
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