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conky/src/hddtemp.c

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/*
* Conky, a system monitor, based on torsmo
*
* Any original torsmo code is licensed under the BSD license
*
* All code written since the fork of torsmo is licensed under the GPL
*
* Please see COPYING for details
*
* Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
* Copyright (c) 2005-2007 Brenden Matthews, Philip Kovacs, et. al. (see AUTHORS)
* All rights reserved.
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*
* $Id$
*/
#include "conky.h"
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <netdb.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <netinet/in.h>
#define BUFLEN 512
#define PORT 7634
char buf[BUFLEN];
int scan_hddtemp(const char *arg, char **dev, char **addr, int *port)
{
char buf1[32], buf2[64];
int n, ret;
ret = sscanf(arg, "%31s %63s %d", buf1, buf2, &n);
if (ret < 1)
return -1;
*dev = strdup(buf1);
if (ret >= 2)
*addr = strdup(buf2);
else
*addr = strdup("127.0.0.1");
if (ret == 3)
*port = n;
else
*port = PORT;
return 0;
}
char *get_hddtemp_info(char *dev, char *hostaddr, int port, char *unit)
{
int sockfd = 0;
struct hostent *he;
struct sockaddr_in addr;
struct timeval tv;
fd_set rfds;
int len, i, devlen = strlen(dev);
char sep;
char *p, *out, *r = NULL;
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
return NULL;
}
he = gethostbyname(hostaddr);
if (!he) {
perror("gethostbyname");
goto out;
}
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr = *((struct in_addr *)he->h_addr);
memset(&(addr.sin_zero), 0, 8);
if (connect(sockfd, (struct sockaddr *)&addr, sizeof(struct sockaddr)) == -1) {
perror("connect");
goto out;
}
FD_ZERO(&rfds);
FD_SET(sockfd, &rfds);
/* We're going to wait up to a quarter a second to see whether
* there's any data available. Polling with timeout set to 0
* doesn't seem to work with hddtemp. */
tv.tv_sec = 0;
tv.tv_usec = 250000;
i = select(sockfd+1, &rfds, NULL, NULL, &tv);
if (i == -1)
{
if (errno == EINTR) /* silently ignore interrupted system call */
goto out;
else
perror("select");
}
/* No data available */
if (i <= 0)
goto out;
p = buf;
len = 0;
do {
i = recv(sockfd, p, BUFLEN - (p-buf), 0);
if (i < 0) {
perror("recv");
goto out;
}
len += i;
p += i;
} while (i > 0 && p < buf + BUFLEN - 1);
if (len < 2) {
goto out;
}
buf[len] = 0;
/* The first character read is the separator. */
sep = buf[0];
p = buf+1;
while (*p) {
if (!strncmp(p, dev, devlen)) {
p += devlen + 1;
p = strchr(p, sep);
if (!p)
goto out;
p++;
out = p;
p = strchr(p, sep);
if (!p)
goto out;
*p = '\0';
p++;
*unit = *p;
if (!strncmp(out, "NA", 2)) {
strcpy(buf, "N/A");
r = buf;
} else {
r = out;
}
goto out;
} else {
for (i = 0; i < 5; i++) {
p = strchr(p, sep);
if (!p)
goto out;
p++;
}
}
}
out: close(sockfd);
return r;
}