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diff --git a/src/temperature.h b/src/temperature.h
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+/*
+ *  temperature.h: The header file for disk drive temperature sensing
+ *
+ *  This program is free software; you can redistribute it and/or modify it under
+ *  the terms of the GNU General Public License as published by the Free Software
+ *  Foundation, version 2.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ *  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ *  details.
+ *
+ *  You should have received a copy of the GNU General Public License along with
+ *  this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef TEMPERATURE_H_
+#define TEMPERATURE_H_
+
+#include <sys/types.h>
+#include "context.h"
+
+/**
+ * This function is called after each nwipe_context_t has been created.
+ * It initialises the temperature variables in each context and then
+ * constructs a path that is placed in the context that points to the
+ * appropriate /sys/class/hwmon/hwmonX directory that corresponds with
+ * the particular drive represented in the context structure.
+ * @param pointer to a drive context
+ * @return returns 0 on success < 1 on error
+ */
+int nwipe_init_temperature( nwipe_context_t* );
+
+void nwipe_update_temperature( nwipe_context_t* );
+
+/**
+ * Workaround for obtaining temperatures from SCSI/SAS drives
+ * @param pointer to a drive context
+ * @return returns 0 on success < 1 on error
+ */
+int nwipe_init_scsi_temperature( nwipe_context_t* );
+int nwipe_get_scsi_temperature( nwipe_context_t* );
+void nwipe_shut_scsi_temperature( nwipe_context_t* );
+void* nwipe_update_temperature_thread( void* ptr );
+
+/**
+ * This function is normally called only once. It's called after both the
+ * nwipe_init_temperature() function and nwipe_update_temperature()
+ * functions have been called. It logs the drives critical, highest, lowest
+ * and lowest critical temperatures. Not all drives report four temperatures.
+ * @param pointer to a drive context
+ */
+void nwipe_log_drives_temperature_limits( nwipe_context_t* );
+
+#define NUMBER_OF_FILES 7
+
+#define NO_TEMPERATURE_DATA 1000000
+
+#endif /* TEMPERATURE_H_ */