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 #include "wmiistatus.h"
  50
  51 #include "config.h"
  52
  53 static void write_to_statusbar(const char *message) {
  54         int fd = open(wmii_path, O_RDWR);
  55         if (fd == -1)
  56                 exit(-2);
  57         write(fd, message, strlen(message));
  58         close(fd);
  59 }
  60
  61 /*
  62  * Write errormessage to statusbar and exit
  63  *
  64  */
  65 static void die(const char *message) {
  66         write_to_statusbar(message);
  67         exit(-1);
  68 }
  69
  70 static char *skip_character(char *input, char character, int amount) {
  71         char *walk;
  72         int len = strlen(input),
  73             blanks = 0;
  74
  75         for (walk = input; ((walk - input) < len) && (blanks < amount); walk++)
  76                 if (*walk == character)
  77                         blanks++;
  78
  79         return (walk == input ? walk : walk-1);
  80 }
  81
  82 static void push_part(const char *input, const int n) {
  83         if (first_push)
  84                 first_push = false;
  85         else
  86                 strncpy(output+strlen(output), " | ", strlen(" | "));
  87         strncpy(output+strlen(output), input, n);
  88 }
  89
  90 /*
  91  * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
  92  * not the full capacity.
  93  *
  94  */
  95 static char *get_battery_info() {
  96         char buf[1024];
  97         static char part[512];
  98         char *walk, *last = buf;
  99         int fd = open("/sys/class/power_supply/BAT0/uevent", O_RDONLY);
 100         if (fd == -1)
 101                 die("Could not open /sys/class/power_supply/BAT0/uevent");
 102         int full_design = -1,
 103             remaining = -1,
 104             present_rate = -1;
 105         charging_status_t status = CS_DISCHARGING;
 106         memset(part, '\0', sizeof(part));
 107         read(fd, buf, sizeof(buf));
 108         for (walk = buf; (walk-buf) < 1024; walk++)
 109                 if (*walk == '=') {
 110                         if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
 111                                 full_design = atoi(walk+1);
 112                         else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW"))
 113                                 remaining = atoi(walk+1);
 114                         else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
 115                                 present_rate = atoi(walk+1);
 116                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
 117                                 status = CS_CHARGING;
 118                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
 119                                 status = CS_FULL;
 120                 } else if (*walk == '\n')
 121                         last = walk+1;
 122         close(fd);
 123
 124         if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
 125                 float remaining_time, perc;
 126                 if (status == CS_CHARGING)
 127                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 128                 else if (status == CS_DISCHARGING)
 129                         remaining_time = ((float)remaining / (float)present_rate);
 130                 else {
 131                         snprintf(part, sizeof(part), "FULL");
 132                         return part;
 133                 }
 134                 perc = ((float)remaining / (float)full_design);
 135
 136                 int seconds = (int)(remaining_time * 3600.0);
 137                 int hours = seconds / 3600;
 138                 seconds -= (hours * 3600);
 139                 int minutes = seconds / 60;
 140                 seconds -= (minutes * 60);
 141
 142                 sprintf(part, "%s %.02f%% %02d:%02d:%02d", (status == CS_CHARGING? "CHR" : "BAT"),
 143                         (perc * 100), hours, minutes, seconds);
 144         }
 145         return part;
 146 }
 147
 148 /*
 149  * Just parses /proc/net/wireless
 150  *
 151  */
 152 static char *get_wireless_info() {
 153         char buf[1024];
 154         static char part[512];
 155         char *interfaces;
 156         memset(buf, '\0', sizeof(buf));
 157         memset(part, '\0', sizeof(part));
 158
 159         int fd = open("/proc/net/wireless", O_RDONLY);
 160         if (fd == -1)
 161                 die("Could not open /proc/net/wireless");
 162         read(fd, buf, sizeof(buf));
 163         close(fd);
 164
 165         interfaces = skip_character(buf, '\n', 2) + 1;
 166         while (interfaces < buf+strlen(buf)) {
 167                 while (isspace((int)*interfaces))
 168                         interfaces++;
 169                 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
 170                         /* Skip status field (0000) */
 171                         interfaces += strlen(wlan_interface) + 2;
 172                         interfaces = skip_character(interfaces, ' ', 1);
 173                         while (isspace((int)*interfaces))
 174                                 interfaces++;
 175                         int quality = atoi(interfaces);
 176                         /* For some reason, I get 255 sometimes */
 177                         if ((quality == 255) || (quality == 0))
 178                                 snprintf(part, sizeof(part), "W: down");
 179                         else {
 180                                 snprintf(part, sizeof(part), "W: (%02d%%) ", quality);
 181                                 char *ip_address = get_ip_address(wlan_interface);
 182                                 strcpy(part+strlen(part), ip_address);
 183                         }
 184
 185                         return part;
 186                 }
 187                 interfaces = skip_character(interfaces, '\n', 1) + 1;
 188         }
 189
 190         return part;
 191 }
 192
 193 static char *get_ip_address(const char *interface) {
 194         static char part[512];
 195         struct ifreq ifr;
 196         memset(part, '\0', sizeof(part));
 197
 198         int fd = socket(AF_INET, SOCK_DGRAM, 0);
 199
 200         strcpy(ifr.ifr_name, interface);
 201         if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0)
 202                 die("Could not get interface flags (SIOCGIFFLAGS)");
 203
 204         if (!(ifr.ifr_flags & IFF_UP) ||
 205             !(ifr.ifr_flags & IFF_RUNNING)) {
 206                 close(fd);
 207                 return NULL;
 208         }
 209
 210         strcpy(ifr.ifr_name, interface);
 211         ifr.ifr_addr.sa_family = AF_INET;
 212         if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
 213                 struct sockaddr_in addr;
 214                 memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
 215                 inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, sizeof(struct sockaddr_in));
 216                 if (strlen(part) == 0)
 217                         sprintf(part, "no IP");
 218         }
 219
 220         close(fd);
 221         return part;
 222 }
 223
 224 static char *get_eth_info() {
 225         static char part[512];
 226         char *ip_address = get_ip_address(eth_interface);
 227
 228         if (ip_address == NULL)
 229                 snprintf(part, sizeof(part), "E: down");
 230         else snprintf(part, sizeof(part), "E: %s", ip_address);
 231
 232         return part;
 233 }
 234
 235
 236 int main(void) {
 237         char part[512],
 238              *end;
 239
 240         while (1) {
 241                 memset(output, '\0', sizeof(output));
 242                 first_push = true;
 243
 244                 char *wireless_info = get_wireless_info();
 245                 push_part(wireless_info, strlen(wireless_info));
 246
 247                 char *eth_info = get_eth_info();
 248                 push_part(eth_info, strlen(eth_info));
 249
 250                 char *battery_info = get_battery_info();
 251                 push_part(battery_info, strlen(battery_info));
 252
 253
 254                 /* Get load */
 255                 int load_avg = open("/proc/loadavg", O_RDONLY);
 256                 read(load_avg, part, sizeof(part));
 257                 close(load_avg);
 258                 end = skip_character(part, ' ', 3);
 259                 push_part(part, (end-part));
 260
 261                 /* Get date & time */
 262                 time_t current_time = time(NULL);
 263                 struct tm *current_tm = localtime(&current_time);
 264                 strftime(part, sizeof(part), "%d.%m.%Y %H:%M:%S", current_tm);
 265                 push_part(part, strlen(part));
 266
 267                 printf("output = %s\n", output);
 268
 269                 int fd = open("/mnt/wmii/rbar/status", O_RDWR);
 270                 write(fd, output, strlen(output));
 271                 close(fd);
 272
 273                 sleep(1);
 274         }
 275 }