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/* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
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* vim: ts=4 sw=4 noet ai cindent syntax=c
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* Conky, a system monitor, based on torsmo
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* Any original torsmo code is licensed under the BSD license
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* All code written since the fork of torsmo is licensed under the GPL
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* Please see COPYING for details
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* Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
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* Copyright (c) 2005-2010 Brenden Matthews, Philip Kovacs, et. al.
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* All rights reserved.
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "conky.h" /* text_buffer_size */
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#include "text_object.h"
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/* this is the root of all per disk stats,
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* also containing the totals. */
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struct diskio_stat stats = {
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.sample = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
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.sample_read = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
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.sample_write = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
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.last_read = UINT_MAX,
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.last_write = UINT_MAX,
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void clear_diskio_stats(void)
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struct diskio_stat *cur;
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stats.next = stats.next->next;
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struct diskio_stat *prepare_diskio_stat(const char *s)
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char stat_name[text_buffer_size], device_name[text_buffer_size];
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struct diskio_stat *cur = &stats;
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#if defined(__FreeBSD__)
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if (strncmp(s, "/dev/", 5) == 0) {
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// supplied a /dev/device arg, so cut off the /dev part
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strncpy(device_name, s + 5, text_buffer_size);
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strncpy(device_name, s, text_buffer_size);
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snprintf(stat_name, text_buffer_size, "/dev/%s", device_name);
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if (stat(stat_name, &sb)) {
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NORM_ERR("diskio device '%s' does not exist", s);
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if (!strcmp(cur->dev, device_name)) {
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/* no existing found, make a new one */
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cur->next = calloc(1, sizeof(struct diskio_stat));
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cur->dev = strndup(device_name, text_buffer_size);
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cur->last = UINT_MAX;
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cur->last_read = UINT_MAX;
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cur->last_write = UINT_MAX;
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void parse_diskio_arg(struct text_object *obj, const char *arg)
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obj->data.opaque = prepare_diskio_stat(arg);
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/* dir indicates the direction:
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static void print_diskio_dir(struct text_object *obj, int dir, char *p, int p_max_size)
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struct diskio_stat *diskio = obj->data.opaque;
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val = diskio->current_read;
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val = diskio->current;
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val = diskio->current_write;
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/* TODO: move this correction from kB to kB/s elsewhere
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* (or get rid of it??) */
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human_readable((val / update_interval) * 1024LL, p, p_max_size);
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void print_diskio(struct text_object *obj, char *p, int p_max_size)
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print_diskio_dir(obj, 0, p, p_max_size);
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void print_diskio_read(struct text_object *obj, char *p, int p_max_size)
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print_diskio_dir(obj, -1, p, p_max_size);
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void print_diskio_write(struct text_object *obj, char *p, int p_max_size)
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print_diskio_dir(obj, 1, p, p_max_size);
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void parse_diskiograph_arg(struct text_object *obj, const char *arg)
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buf = scan_graph(obj, arg, 0);
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obj->data.opaque = prepare_diskio_stat(dev_name(buf));
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static void print_diskiograph_dir(struct text_object *obj, int dir, char *p, int p_max_size)
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struct diskio_stat *diskio = obj->data.opaque;
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val = diskio->current_read;
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val = diskio->current;
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val = diskio->current_write;
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new_graph(obj, p, p_max_size, val);
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void print_diskiograph(struct text_object *obj, char *p, int p_max_size)
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print_diskiograph_dir(obj, 0, p, p_max_size);
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void print_diskiograph_read(struct text_object *obj, char *p, int p_max_size)
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print_diskiograph_dir(obj, -1, p, p_max_size);
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void print_diskiograph_write(struct text_object *obj, char *p, int p_max_size)
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print_diskiograph_dir(obj, 1, p, p_max_size);
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void update_diskio_values(struct diskio_stat *ds,
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unsigned int reads, unsigned int writes)
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double sum=0, sum_r=0, sum_w=0;
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if (reads < ds->last_read || writes < ds->last_write) {
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/* counter overflow or reset - rebase to sane values */
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ds->last = reads+writes;
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ds->last_read = reads;
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ds->last_write = writes;
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/* since the values in /proc/diskstats are absolute, we have to subtract
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* our last reading. The numbers stand for "sectors read", and we therefore
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* have to divide by two to get KB */
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ds->sample_read[0] = (reads - ds->last_read) / 2;
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ds->sample_write[0] = (writes - ds->last_write) / 2;
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ds->sample[0] = ds->sample_read[0] + ds->sample_write[0];
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/* compute averages */
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for (i = 0; i < (signed) info.diskio_avg_samples; i++) {
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sum += ds->sample[i];
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sum_r += ds->sample_read[i];
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sum_w += ds->sample_write[i];
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ds->current = sum / (double) info.diskio_avg_samples;
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ds->current_read = sum_r / (double) info.diskio_avg_samples;
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ds->current_write = sum_w / (double) info.diskio_avg_samples;
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/* shift sample history */
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for (i = info.diskio_avg_samples-1; i > 0; i--) {
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ds->sample[i] = ds->sample[i-1];
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ds->sample_read[i] = ds->sample_read[i-1];
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ds->sample_write[i] = ds->sample_write[i-1];
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ds->last_read = reads;
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ds->last_write = writes;
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ds->last = ds->last_read + ds->last_write;