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-rw-r--r--plugin_hddtemp.c282
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diff --git a/plugin_hddtemp.c b/plugin_hddtemp.c
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+/* $Id: plugin_hddtemp.c 950 2009-01-08 14:59:24Z michael $
+ * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/plugin_hddtemp.c $
+ *
+ * plugin hddtemp
+ *
+ * Copyright (C) 2007 Scott Bronson <brons_lcd4linux@rinspin.com>
+ * Copyright (C) 2004, 2005, 2006, 2007, 2008 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * This file is part of LCD4Linux.
+ *
+ * LCD4Linux 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; either version 2, or (at your option)
+ * any later version.
+ *
+ * LCD4Linux 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/* Example:
+ * (I tried to put this info on the wiki but Akismet claimed it was spam)
+
+ Widget SmallHDDTemp {
+ class 'Text'
+ expression hddtemp('/dev/hda')
+ width 4
+ precision 1
+ align 'R'
+ update tick
+ }
+
+ hddtemp home page: http://www.guzu.net/linux/hddtemp.php
+
+ Quick Examples:
+ * hddtemp() -- return temperature of first drive (order is defined by the hddtemp daemon).
+ * hddtemp('/dev/hda') -- return temperature of /dev/hda on localhost.
+ * hddtemp('ST3400832A') -- return temperature of the drive with the given ID.
+ * hddtemp('burly', '') -- return temperature of the first drive on host burly.
+ * hddtemp('burly', 17634, '/dev/hda') -- return temperature of /dev/hda on burly connecting to the hddtemp daemon listening on port 17634.
+
+You can find out what drives are being monitored by running
+ telnet HOST PORT
+
+i.e.
+
+ $ telnet localhost 7634
+ Trying 127.0.0.1...
+ Connected to localhost.
+ Escape character is '^]'.
+ |/dev/hda|ST3400832A|53|C|Connection closed by foreign host.
+
+This tells me that /dev/hda is a Seagate ST3400832A running at an awfully
+toasty 53 degC.
+
+ */
+
+
+/*
+ * exported functions:
+ *
+ * int plugin_init_hddtemp (void)
+ * adds various functions
+ * void plugin_exit_hddtemp (void)
+ *
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+/* network specific includes */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+
+/* these should always be included */
+#include "debug.h"
+#include "plugin.h"
+
+
+
+static int socket_open(const char *name, int port)
+{
+ struct sockaddr_in server;
+ struct hostent *host_info;
+ unsigned long addr;
+ int sock;
+
+ sock = socket(PF_INET, SOCK_STREAM, 0);
+ if (sock < 0) {
+ error("[hddtemp] failed to create socket: %s", strerror(errno));
+ return -1;
+ }
+
+ memset(&server, 0, sizeof(server));
+ if ((addr = inet_addr(name)) != INADDR_NONE) {
+ memcpy((char *) &server.sin_addr, &addr, sizeof(addr));
+ } else {
+ host_info = gethostbyname(name);
+ if (NULL == host_info) {
+ error("[hddtemp] Unknown server: %s", name);
+ return -1;
+ }
+ memcpy((char *) &server.sin_addr, host_info->h_addr, host_info->h_length);
+ }
+
+ server.sin_family = AF_INET;
+ server.sin_port = htons(port);
+
+ if (connect(sock, (struct sockaddr *) &server, sizeof(server)) < 0) {
+ error("[hddtemp] can't connect to server %s: %s", name, strerror(errno));
+ return -1;
+ }
+
+ return sock;
+}
+
+
+static size_t hddtemp_read(int socket, char *buffer, size_t size)
+{
+ size_t count = 0;
+ ssize_t len;
+
+ while (count < size) {
+ len = read(socket, buffer + count, size - count);
+ if (len > 0) {
+ count += len;
+ } else if (len < 0) {
+ error("[hddtemp] couldn't read from socket: %s", strerror(errno));
+ return -1;
+ } else {
+ break; /* remote socket has closed */
+ }
+ }
+
+ // null-terminate the string
+ if (count < size) {
+ buffer[count] = '\0';
+ } else {
+ buffer[size - 1] = '\0';
+ }
+
+ return count;
+}
+
+
+static int hddtemp_connect(const char *host, int port, char *buffer, size_t size)
+{
+ int socket, ret;
+
+ socket = socket_open(host, port);
+ if (socket < 0) {
+ error("[hddtemp] Error accessing %s:%d: %s", host, port, strerror(errno));
+ return -1;
+ }
+
+ ret = hddtemp_read(socket, buffer, size);
+ close(socket);
+
+ return ret;
+}
+
+
+/* split a value into columns and return the nth column */
+/* WARNING: does return a pointer to a static string!! */
+static char *split(const char *value, const int column)
+{
+ static char buffer[256];
+ const char *p, *q, *v;
+ size_t l;
+ int c;
+
+ c = 0;
+ p = value;
+ q = NULL;
+ for (v = value; v && *v; v++) {
+ if (*v == '|') {
+ if (c == column) {
+ q = v;
+ break;
+ } else {
+ p = v + 1;
+ }
+ c++;
+ }
+ }
+
+ if (c < column)
+ return NULL;
+
+ l = q ? (size_t) (q - p) : strlen(p);
+ if (l >= sizeof(buffer))
+ l = sizeof(buffer) - 1;
+ strncpy(buffer, p, l);
+
+ buffer[l] = '\0';
+ return buffer;
+}
+
+static char *hddtemp_fetch(const char *host, int port, const char *device)
+{
+ char buffer[4096];
+ char *key;
+ int i;
+
+ /* fetch a buffer of all hddtemps */
+ if (!hddtemp_connect(host, port, buffer, sizeof(buffer))) {
+ return "err";
+ }
+
+ i = 1;
+ while (1) {
+ key = split(buffer, i);
+ if (key == NULL)
+ break;
+ if (strcmp(device, key) == 0) {
+ return split(buffer, i + 2);
+ }
+ i += 5;
+ }
+
+ return "n/a";
+}
+
+
+static void my_hddtemp(RESULT * result, int argc, RESULT * argv[])
+{
+ char *device = "";
+ int port = 7634;
+ char *host = "localhost";
+ char *value;
+
+ switch (argc) {
+ case 0:
+ break;
+ case 1:
+ device = R2S(argv[0]);
+ break;
+ case 2:
+ host = R2S(argv[0]);
+ device = R2S(argv[1]);
+ break;
+ case 3:
+ host = R2S(argv[0]);
+ port = (int) R2N(argv[1]);
+ device = R2S(argv[2]);
+ break;
+ default:
+ error("hddtemp(): too many parameters");
+ SetResult(&result, R_STRING, "");
+ return;
+ }
+
+ value = hddtemp_fetch(host, port, device);
+ SetResult(&result, R_STRING, value);
+}
+
+
+int plugin_init_hddtemp(void)
+{
+ AddFunction("hddtemp", -1, my_hddtemp);
+
+ return 0;
+}
+
+
+void plugin_exit_hddtemp(void)
+{
+}
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