vcs.maemo.org Git - monky/blob - src/hddtemp.c

   1 /* Conky, a system monitor, based on torsmo
   2  *
   3  * Any original torsmo code is licensed under the BSD license
   4  *
   5  * All code written since the fork of torsmo is licensed under the GPL
   6  *
   7  * Please see COPYING for details
   8  *
   9  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
  10  * Copyright (c) 2005-2008 Brenden Matthews, Philip Kovacs, et. al.
  11  *      (see AUTHORS)
  12  * All rights reserved.
  13  *
  14  * This program is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation, either version 3 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25  *
  26  * $Id$ */
  27
  28 #include "conky.h"
  29 #include <errno.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <stdlib.h>
  33 #include <unistd.h>
  34 #include <fcntl.h>
  35 #include <netdb.h>
  36 #include <sys/select.h>
  37 #include <sys/socket.h>
  38 #include <netinet/in.h>
  39
  40 #define BUFLEN 512
  41 #define PORT 7634
  42
  43 char buf[BUFLEN];
  44
  45 int scan_hddtemp(const char *arg, char **dev, char **addr, int *port, char** temp)
  46 {
  47         char buf1[32], buf2[64];
  48         int n, ret;
  49
  50         ret = sscanf(arg, "%31s %63s %d", buf1, buf2, &n);
  51
  52         if (ret < 1) {
  53                 return -1;
  54         }
  55
  56         if (strncmp(buf1, "/dev/", 5)) {
  57                 strncpy(buf1 + 5, buf1, 32 - 5);
  58                 strncpy(buf1, "/dev/", 5);
  59         }
  60         *dev = strndup(buf1, text_buffer_size);
  61
  62         if (ret >= 2) {
  63                 *addr = strndup(buf2, text_buffer_size);
  64         } else {
  65                 *addr = strndup("127.0.0.1", text_buffer_size);
  66         }
  67
  68         if (ret == 3) {
  69                 *port = n;
  70         } else {
  71                 *port = PORT;
  72         }
  73
  74         *temp = malloc(text_buffer_size);
  75         memset(*temp, 0, text_buffer_size);
  76
  77         return 0;
  78 }
  79
  80 char *get_hddtemp_info(char *dev, char *hostaddr, int port, char *unit)
  81 {
  82         int sockfd = 0;
  83         struct hostent he, *he_res = 0;
  84         int he_errno;
  85         char hostbuff[2048];
  86         struct sockaddr_in addr;
  87         struct timeval tv;
  88         fd_set rfds;
  89         int len, i, devlen = strlen(dev);
  90         char sep;
  91         char *p, *out, *r = NULL;
  92
  93         if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
  94                 perror("socket");
  95                 return NULL;
  96         }
  97
  98         do {
  99 #ifdef HAVE_GETHOSTBYNAME_R
 100                 if (gethostbyname_r(hostaddr, &he, hostbuff, sizeof(hostbuff), &he_res, &he_errno)) {   // get the host info
 101                         ERR("hddtemp gethostbyname_r: %s", hstrerror(h_errno));
 102                         break;
 103                 }
 104 #else /* HAVE_GETHOSTBYNAME_R */
 105                 he_res = gethostbyname(hostaddr);
 106                 if (!he_res) {
 107                         perror("gethostbyname");
 108                         break;
 109                 }
 110 #endif /* HAVE_GETHOSTBYNAME_R */
 111
 112                 addr.sin_family = AF_INET;
 113                 addr.sin_port = htons(port);
 114                 addr.sin_addr = *((struct in_addr *) he_res->h_addr);
 115                 memset(&(addr.sin_zero), 0, 8);
 116
 117                 if (connect(sockfd, (struct sockaddr *) &addr,
 118                                         sizeof(struct sockaddr)) == -1) {
 119                         perror("connect");
 120                         break;
 121                 }
 122
 123                 FD_ZERO(&rfds);
 124                 FD_SET(sockfd, &rfds);
 125
 126                 /* We're going to wait up to a quarter a second to see whether there's
 127                  * any data available. Polling with timeout set to 0 doesn't seem to work
 128                  * with hddtemp. */
 129                 tv.tv_sec = 0;
 130                 tv.tv_usec = 250000;
 131
 132                 i = select(sockfd + 1, &rfds, NULL, NULL, &tv);
 133                 if (i == -1) {
 134                         if (errno == EINTR) {   /* silently ignore interrupted system call */
 135                                 break;
 136                         } else {
 137                                 perror("select");
 138                         }
 139                 }
 140
 141                 /* No data available */
 142                 if (i <= 0) {
 143                         break;
 144                 }
 145
 146                 p = buf;
 147                 len = 0;
 148                 do {
 149                         i = recv(sockfd, p, BUFLEN - (p - buf), 0);
 150                         if (i < 0) {
 151                                 perror("recv");
 152                                 break;
 153                         }
 154                         len += i;
 155                         p += i;
 156                 } while (i > 0 && p < buf + BUFLEN - 1);
 157
 158                 if (len < 2) {
 159                         break;
 160                 }
 161
 162                 buf[len] = 0;
 163
 164                 /* The first character read is the separator. */
 165                 sep = buf[0];
 166                 p = buf + 1;
 167
 168                 while (*p) {
 169                         if (!strncmp(p, dev, devlen)) {
 170                                 p += devlen + 1;
 171                                 p = strchr(p, sep);
 172                                 if (!p) {
 173                                         break;
 174                                 }
 175                                 p++;
 176                                 out = p;
 177                                 p = strchr(p, sep);
 178                                 if (!p) {
 179                                         break;
 180                                 }
 181                                 *p = '\0';
 182                                 p++;
 183                                 *unit = *p;
 184                                 if (!strncmp(out, "NA", 2)) {
 185                                         strncpy(buf, "N/A", BUFLEN);
 186                                         r = buf;
 187                                 } else {
 188                                         r = out;
 189                                 }
 190                                 break;
 191                         } else {
 192                                 for (i = 0; i < 5; i++) {
 193                                         p = strchr(p, sep);
 194                                         if (!p) {
 195                                                 break;
 196                                         }
 197                                         p++;
 198                                 }
 199                                 if (!p && i < 5) {
 200                                         break;
 201                                 }
 202                         }
 203                 }
 204         } while (0);
 205         close(sockfd);
 206         return r;
 207 }