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 <glob.h>
  50
  51 #include "wmiistatus.h"
  52 #include "config.h"
  53
  54 static void write_to_statusbar(const char *message) {
  55         int fd = open(wmii_path, O_RDWR);
  56         if (fd == -1)
  57                 exit(-2);
  58         write(fd, message, strlen(message));
  59         close(fd);
  60 }
  61
  62 /*
  63  * Write errormessage to statusbar and exit
  64  *
  65  */
  66 static void die(const char *message) {
  67         write_to_statusbar(message);
  68         exit(-1);
  69 }
  70
  71 static char *skip_character(char *input, char character, int amount) {
  72         char *walk;
  73         int len = strlen(input),
  74             blanks = 0;
  75
  76         for (walk = input; ((walk - input) < len) && (blanks < amount); walk++)
  77                 if (*walk == character)
  78                         blanks++;
  79
  80         return (walk == input ? walk : walk-1);
  81 }
  82
  83 static void push_part(const char *input, const int n) {
  84         if (first_push)
  85                 first_push = false;
  86         else
  87                 strncpy(output+strlen(output), " | ", strlen(" | "));
  88         strncpy(output+strlen(output), input, n);
  89 }
  90
  91 /*
  92  * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
  93  * not the full capacity.
  94  *
  95  */
  96 static char *get_battery_info() {
  97         char buf[1024];
  98         static char part[512];
  99         char *walk, *last = buf;
 100         int fd = open("/sys/class/power_supply/BAT0/uevent", O_RDONLY);
 101         if (fd == -1)
 102                 die("Could not open /sys/class/power_supply/BAT0/uevent");
 103         int full_design = -1,
 104             remaining = -1,
 105             present_rate = -1;
 106         charging_status_t status = CS_DISCHARGING;
 107         memset(part, '\0', sizeof(part));
 108         read(fd, buf, sizeof(buf));
 109         for (walk = buf; (walk-buf) < 1024; walk++)
 110                 if (*walk == '=') {
 111                         if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
 112                                 full_design = atoi(walk+1);
 113                         else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW"))
 114                                 remaining = atoi(walk+1);
 115                         else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
 116                                 present_rate = atoi(walk+1);
 117                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
 118                                 status = CS_CHARGING;
 119                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
 120                                 status = CS_FULL;
 121                 } else if (*walk == '\n')
 122                         last = walk+1;
 123         close(fd);
 124
 125         if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
 126                 float remaining_time, perc;
 127                 if (status == CS_CHARGING)
 128                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 129                 else if (status == CS_DISCHARGING)
 130                         remaining_time = ((float)remaining / (float)present_rate);
 131                 else {
 132                         snprintf(part, sizeof(part), "FULL");
 133                         return part;
 134                 }
 135                 perc = ((float)remaining / (float)full_design);
 136
 137                 int seconds = (int)(remaining_time * 3600.0);
 138                 int hours = seconds / 3600;
 139                 seconds -= (hours * 3600);
 140                 int minutes = seconds / 60;
 141                 seconds -= (minutes * 60);
 142
 143                 sprintf(part, "%s %.02f%% %02d:%02d:%02d", (status == CS_CHARGING? "CHR" : "BAT"),
 144                         (perc * 100), hours, minutes, seconds);
 145         }
 146         return part;
 147 }
 148
 149 /*
 150  * Just parses /proc/net/wireless
 151  *
 152  */
 153 static char *get_wireless_info() {
 154         char buf[1024];
 155         static char part[512];
 156         char *interfaces;
 157         memset(buf, '\0', sizeof(buf));
 158         memset(part, '\0', sizeof(part));
 159
 160         int fd = open("/proc/net/wireless", O_RDONLY);
 161         if (fd == -1)
 162                 die("Could not open /proc/net/wireless");
 163         read(fd, buf, sizeof(buf));
 164         close(fd);
 165
 166         interfaces = skip_character(buf, '\n', 2) + 1;
 167         while (interfaces < buf+strlen(buf)) {
 168                 while (isspace((int)*interfaces))
 169                         interfaces++;
 170                 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
 171                         /* Skip status field (0000) */
 172                         interfaces += strlen(wlan_interface) + 2;
 173                         interfaces = skip_character(interfaces, ' ', 1);
 174                         while (isspace((int)*interfaces))
 175                                 interfaces++;
 176                         int quality = atoi(interfaces);
 177                         /* For some reason, I get 255 sometimes */
 178                         if ((quality == 255) || (quality == 0))
 179                                 snprintf(part, sizeof(part), "W: down");
 180                         else {
 181                                 snprintf(part, sizeof(part), "W: (%02d%%) ", quality);
 182                                 char *ip_address = get_ip_address(wlan_interface);
 183                                 strcpy(part+strlen(part), ip_address);
 184                         }
 185
 186                         return part;
 187                 }
 188                 interfaces = skip_character(interfaces, '\n', 1) + 1;
 189         }
 190
 191         return part;
 192 }
 193
 194 static char *get_ip_address(const char *interface) {
 195         static char part[512];
 196         struct ifreq ifr;
 197         memset(part, '\0', sizeof(part));
 198
 199         int fd = socket(AF_INET, SOCK_DGRAM, 0);
 200
 201         strcpy(ifr.ifr_name, interface);
 202         if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0)
 203                 die("Could not get interface flags (SIOCGIFFLAGS)");
 204
 205         if (!(ifr.ifr_flags & IFF_UP) ||
 206             !(ifr.ifr_flags & IFF_RUNNING)) {
 207                 close(fd);
 208                 return NULL;
 209         }
 210
 211         strcpy(ifr.ifr_name, interface);
 212         ifr.ifr_addr.sa_family = AF_INET;
 213         if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
 214                 struct sockaddr_in addr;
 215                 memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
 216                 inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, sizeof(struct sockaddr_in));
 217                 if (strlen(part) == 0)
 218                         sprintf(part, "no IP");
 219         }
 220
 221         close(fd);
 222         return part;
 223 }
 224
 225 static char *get_eth_info() {
 226         static char part[512];
 227         char *ip_address = get_ip_address(eth_interface);
 228
 229         if (ip_address == NULL)
 230                 snprintf(part, sizeof(part), "E: down");
 231         else snprintf(part, sizeof(part), "E: %s", ip_address);
 232
 233         return part;
 234 }
 235
 236 /*
 237  * Checks if the PID in path is still valid by checking if /proc/<pid> exists
 238  *
 239  */
 240 bool process_runs(const char *path) {
 241         char pidbuf[512],
 242              procbuf[512];
 243         static glob_t globbuf;
 244         struct stat statbuf;
 245
 246         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
 247                 die("glob() failed");
 248         const char *real_path = (globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
 249         int fd = open(real_path, O_RDONLY);
 250         globfree(&globbuf);
 251         if (fd < 0)
 252                 return false;
 253         read(fd, pidbuf, sizeof(pidbuf));
 254         close(fd);
 255         sprintf(procbuf, "/proc/%s", pidbuf);
 256         return (stat(procbuf, &statbuf) >= 0);
 257 }
 258
 259 int main(void) {
 260         char part[512],
 261              *end;
 262         unsigned int i;
 263
 264         while (1) {
 265                 memset(output, '\0', sizeof(output));
 266                 first_push = true;
 267
 268                 for (i = 0; i < sizeof(run_watches) / sizeof(char*); i += 2) {
 269                         sprintf(part, "%s: %s", run_watches[i], (process_runs(run_watches[i+1]) ? "yes" : "no"));
 270                         push_part(part, strlen(part));
 271                 }
 272
 273                 char *wireless_info = get_wireless_info();
 274                 push_part(wireless_info, strlen(wireless_info));
 275
 276                 char *eth_info = get_eth_info();
 277                 push_part(eth_info, strlen(eth_info));
 278
 279                 char *battery_info = get_battery_info();
 280                 push_part(battery_info, strlen(battery_info));
 281
 282                 /* Get load */
 283                 int load_avg = open("/proc/loadavg", O_RDONLY);
 284                 if (load_avg == -1)
 285                         die("Could not open /proc/loadavg");
 286                 read(load_avg, part, sizeof(part));
 287                 close(load_avg);
 288                 end = skip_character(part, ' ', 3);
 289                 push_part(part, (end-part));
 290
 291                 /* Get date & time */
 292                 time_t current_time = time(NULL);
 293                 struct tm *current_tm = localtime(&current_time);
 294                 strftime(part, sizeof(part), "%d.%m.%Y %H:%M:%S", current_tm);
 295                 push_part(part, strlen(part));
 296
 297                 int fd = open("/mnt/wmii/rbar/status", O_RDWR);
 298                 write(fd, output, strlen(output));
 299                 close(fd);
 300
 301                 sleep(1);
 302         }
 303 }