git.sur5r.net Git - i3/i3status/blob - wmiistatus.c

   1 /*
   2  * Generates a status line for use with wmii or other minimal window managers
   3  *
   4  *
   5  * Copyright (c) 2008 Michael Stapelberg and contributors
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without modification,
   9  * are permitted provided that the following conditions are met:
  10  *
  11  * * Redistributions of source code must retain the above copyright notice, this
  12  *   list of conditions and the following disclaimer.
  13  *
  14  * * Redistributions in binary form must reproduce the above copyright notice, this
  15  *   list of conditions and the following disclaimer in the documentation and/or other
  16  *   materials provided with the distribution.
  17  *
  18  * * Neither the name of Michael Stapelberg nor the names of contributors
  19  *   may be used to endorse or promote products derived from this software without
  20  *   specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
  23  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  25  * SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  27  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  28  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  30  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  31  * DAMAGE.
  32  *
  33  */
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <fcntl.h>
  37 #include <string.h>
  38 #include <stdio.h>
  39 #include <time.h>
  40 #include <stdbool.h>
  41 #include <unistd.h>
  42 #include <stdlib.h>
  43 #include <ctype.h>
  44 #include <net/if.h>
  45 #include <sys/ioctl.h>
  46 #include <sys/socket.h>
  47 #include <netinet/in.h>
  48 #include <arpa/inet.h>
  49
  50 const char *wlan_interface = "wlan0";
  51 const char *eth_interface = "eth0";
  52
  53 // TODO: run-watches, z.B.
  54 // "/var/run/dhcp*.pid" --> checkt ob's das file gibt, ob der prozess läuft und zeigt dann yes/no an
  55 // "/var/run/vpnc*.pid"
  56
  57 char output[512];
  58 bool first_push = true;
  59
  60 static char *skip_character(char *input, char character, int amount) {
  61         char *walk;
  62         int len = strlen(input),
  63             blanks = 0;
  64
  65         for (walk = input; ((walk - input) < len) && (blanks < amount); walk++)
  66                 if (*walk == character)
  67                         blanks++;
  68
  69         return (walk == input ? walk : walk-1);
  70 }
  71
  72 static void push_part(const char *input, const int n) {
  73         if (first_push)
  74                 first_push = false;
  75         else
  76                 strncpy(output+strlen(output), " | ", strlen(" | "));
  77         strncpy(output+strlen(output), input, n);
  78 }
  79
  80 /*
  81  * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
  82  * not the full capacity.
  83  *
  84  */
  85 static char *get_battery_info() {
  86         char buf[1024];
  87         static char output[512];
  88         char *walk, *last = buf;
  89         int fd = open("/sys/class/power_supply/BAT0/uevent", O_RDONLY);
  90         int full_design = -1,
  91             remaining = -1,
  92             present_rate = -1;
  93         bool charging = false;
  94         memset(output, '\0', sizeof(output));
  95         read(fd, buf, sizeof(buf));
  96         /* TODO: charged */
  97         for (walk = buf; (walk-buf) < 1024; walk++)
  98                 if (*walk == '=') {
  99                         if (strncmp(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN", strlen("POWER_SUPPLY_ENERGY_FULL_DESIGN")) == 0)
 100                                 full_design = atoi(walk+1);
 101                         else if (strncmp(last, "POWER_SUPPLY_ENERGY_NOW", strlen("POWER_SUPPLY_ENERGY_NOW")) == 0)
 102                                 remaining = atoi(walk+1);
 103                         else if (strncmp(last, "POWER_SUPPLY_CURRENT_NOW", strlen("POWER_SUPPLY_CURRENT_NOW")) == 0)
 104                                 present_rate = atoi(walk+1);
 105                         else if (strncmp(last, "POWER_SUPPLY_STATUS=Charging", strlen("POWER_SUPPLY_STATUS=Charging")) == 0)
 106                                 charging = true;
 107                 } else if (*walk == '\n')
 108                         last = walk+1;
 109         close(fd);
 110
 111         if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
 112                 float time, perc;
 113                 if (charging)
 114                         time = ((float)full_design - (float)remaining) / (float)present_rate;
 115                 else time = ((float)remaining / (float)present_rate);
 116                 perc = ((float)remaining / (float)full_design);
 117
 118                 int seconds = (int)(time * 3600.0);
 119                 int hours = seconds / 3600;
 120                 seconds -= (hours * 3600);
 121                 int minutes = seconds / 60;
 122                 seconds -= (minutes * 60);
 123
 124                 sprintf(output, "%s %.02f%% %02d:%02d:%02d", (charging ? "CHR" : "BAT"), (perc * 100), hours, minutes, seconds);
 125         }
 126         return output;
 127 }
 128
 129 /*
 130  * Just parses /proc/net/wireless
 131  *
 132  */
 133 static char *get_wireless_info() {
 134         char buf[1024];
 135         static char output[512];
 136         char *interfaces;
 137         memset(buf, '\0', sizeof(buf));
 138         memset(output, '\0', sizeof(output));
 139
 140         int fd = open("/proc/net/wireless", O_RDONLY);
 141         read(fd, buf, sizeof(buf));
 142         close(fd);
 143
 144         interfaces = skip_character(buf, '\n', 2) + 1;
 145         while (interfaces < buf+strlen(buf)) {
 146                 while (isspace((int)*interfaces))
 147                         interfaces++;
 148                 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
 149                         /* Skip status field (0000) */
 150                         interfaces += strlen(wlan_interface) + 2;
 151                         interfaces = skip_character(interfaces, ' ', 1);
 152                         while (isspace((int)*interfaces))
 153                                 interfaces++;
 154                         int quality = atoi(interfaces);
 155                         /* For some reason, I get 255 sometimes */
 156                         if ((quality == 255) || (quality == 0))
 157                                 snprintf(output, sizeof(output), "W: down");
 158                         else snprintf(output, sizeof(output), "W: (%02d%%) ", quality);
 159                         // TODO: get IP address
 160                         return output;
 161                 }
 162                 interfaces = skip_character(interfaces, '\n', 1) + 1;
 163         }
 164
 165         return output;
 166 }
 167
 168 static char *get_eth_info() {
 169         static char output[512];
 170         struct ifreq ifr;
 171         memset(output, '\0', sizeof(output));
 172
 173         int fd = socket(AF_INET, SOCK_DGRAM, 0);
 174
 175         strcpy(ifr.ifr_name, eth_interface);
 176         if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
 177                 printf("böses fehler\n");
 178                 /* TODO: errorhandling */
 179         }
 180         if (!(ifr.ifr_flags & IFF_UP) ||
 181             !(ifr.ifr_flags & IFF_RUNNING)) {
 182                 sprintf(output, "E: down");
 183                 close(fd);
 184                 return output;
 185         }
 186
 187         strcpy(ifr.ifr_name, eth_interface);
 188         ifr.ifr_addr.sa_family = AF_INET;
 189         if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
 190                 struct sockaddr_in addr;
 191                 memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
 192                 inet_ntop(AF_INET, &addr.sin_addr.s_addr, output+3, sizeof(struct sockaddr_in));
 193                 strncpy(output, "E: ", strlen("E: "));
 194                 if (strlen(output) == 0)
 195                         sprintf(output, "E: no IP");
 196         }
 197
 198         close(fd);
 199         return output;
 200 }
 201
 202 int main() {
 203         char part[512],
 204              *end;
 205
 206         while (1) {
 207                 memset(output, '\0', sizeof(output));
 208                 first_push = true;
 209
 210                 char *wireless_info = get_wireless_info();
 211                 push_part(wireless_info, strlen(wireless_info));
 212
 213                 char *eth_info = get_eth_info();
 214                 push_part(eth_info, strlen(eth_info));
 215
 216                 char *battery_info = get_battery_info();
 217                 push_part(battery_info, strlen(battery_info));
 218
 219
 220                 /* Get load */
 221                 int load_avg = open("/proc/loadavg", O_RDONLY);
 222                 read(load_avg, part, sizeof(part));
 223                 close(load_avg);
 224                 end = skip_character(part, ' ', 3);
 225                 push_part(part, (end-part));
 226
 227                 /* Get date & time */
 228                 time_t current_time = time(NULL);
 229                 struct tm *current_tm = localtime(&current_time);
 230                 strftime(part, sizeof(part), "%d.%m.%Y %H:%M:%S", current_tm);
 231                 push_part(part, strlen(part));
 232
 233                 printf("output = %s\n", output);
 234
 235                 int fd = open("/mnt/wmii/rbar/status", O_RDWR);
 236                 write(fd, output, strlen(output));
 237                 close(fd);
 238
 239                 sleep(1);
 240         }
 241 }