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 <stdarg.h>
  42 #include <unistd.h>
  43 #include <stdlib.h>
  44 #include <ctype.h>
  45 #include <net/if.h>
  46 #include <sys/ioctl.h>
  47 #include <sys/socket.h>
  48 #include <netinet/in.h>
  49 #include <arpa/inet.h>
  50 #include <glob.h>
  51
  52 #include "wmiistatus.h"
  53 #include "config.h"
  54
  55 static void write_to_statusbar(const char *message) {
  56         int fd = open(wmii_path, O_RDWR);
  57         if (fd == -1)
  58                 exit(-2);
  59         write(fd, message, strlen(message));
  60         close(fd);
  61 }
  62
  63 /*
  64  * Write errormessage to statusbar and exit
  65  *
  66  */
  67 static void die(const char *fmt, ...) {
  68         char buffer[512];
  69         va_list ap;
  70         va_start(ap, fmt);
  71         vsprintf(buffer, fmt, ap);
  72         va_end(ap);
  73
  74         write_to_statusbar(buffer);
  75         exit(-1);
  76 }
  77
  78 static char *skip_character(char *input, char character, int amount) {
  79         char *walk;
  80         int len = strlen(input),
  81             blanks = 0;
  82
  83         for (walk = input; ((walk - input) < len) && (blanks < amount); walk++)
  84                 if (*walk == character)
  85                         blanks++;
  86
  87         return (walk == input ? walk : walk-1);
  88 }
  89
  90 static void push_part(const char *input, const int n) {
  91         if (first_push)
  92                 first_push = false;
  93         else
  94                 strncpy(output+strlen(output), " | ", strlen(" | "));
  95         strncpy(output+strlen(output), input, n);
  96 }
  97
  98 /*
  99  * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
 100  * not the full capacity.
 101  *
 102  */
 103 static char *get_battery_info() {
 104         char buf[1024];
 105         static char part[512];
 106         char *walk, *last = buf;
 107         int fd = open(battery, O_RDONLY);
 108         if (fd == -1)
 109                 die("Could not open %s", battery);
 110         int full_design = -1,
 111             remaining = -1,
 112             present_rate = -1;
 113         charging_status_t status = CS_DISCHARGING;
 114         memset(part, '\0', sizeof(part));
 115         read(fd, buf, sizeof(buf));
 116         for (walk = buf; (walk-buf) < 1024; walk++)
 117                 if (*walk == '=') {
 118                         if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
 119                                 full_design = atoi(walk+1);
 120                         else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW"))
 121                                 remaining = atoi(walk+1);
 122                         else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
 123                                 present_rate = atoi(walk+1);
 124                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
 125                                 status = CS_CHARGING;
 126                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
 127                                 status = CS_FULL;
 128                 } else if (*walk == '\n')
 129                         last = walk+1;
 130         close(fd);
 131
 132         if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
 133                 float remaining_time, perc;
 134                 if (status == CS_CHARGING)
 135                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 136                 else if (status == CS_DISCHARGING)
 137                         remaining_time = ((float)remaining / (float)present_rate);
 138                 else {
 139                         snprintf(part, sizeof(part), "FULL");
 140                         return part;
 141                 }
 142                 perc = ((float)remaining / (float)full_design);
 143
 144                 int seconds = (int)(remaining_time * 3600.0);
 145                 int hours = seconds / 3600;
 146                 seconds -= (hours * 3600);
 147                 int minutes = seconds / 60;
 148                 seconds -= (minutes * 60);
 149
 150                 sprintf(part, "%s %.02f%% %02d:%02d:%02d", (status == CS_CHARGING? "CHR" : "BAT"),
 151                         (perc * 100), hours, minutes, seconds);
 152         }
 153         return part;
 154 }
 155
 156 /*
 157  * Just parses /proc/net/wireless
 158  *
 159  */
 160 static char *get_wireless_info() {
 161         char buf[1024];
 162         static char part[512];
 163         char *interfaces;
 164         memset(buf, '\0', sizeof(buf));
 165         memset(part, '\0', sizeof(part));
 166
 167         int fd = open("/proc/net/wireless", O_RDONLY);
 168         if (fd == -1)
 169                 die("Could not open /proc/net/wireless");
 170         read(fd, buf, sizeof(buf));
 171         close(fd);
 172
 173         interfaces = skip_character(buf, '\n', 2) + 1;
 174         while (interfaces < buf+strlen(buf)) {
 175                 while (isspace((int)*interfaces))
 176                         interfaces++;
 177                 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
 178                         /* Skip status field (0000) */
 179                         interfaces += strlen(wlan_interface) + 2;
 180                         interfaces = skip_character(interfaces, ' ', 1);
 181                         while (isspace((int)*interfaces))
 182                                 interfaces++;
 183                         int quality = atoi(interfaces);
 184                         /* For some reason, I get 255 sometimes */
 185                         if ((quality == 255) || (quality == 0))
 186                                 snprintf(part, sizeof(part), "W: down");
 187                         else {
 188                                 snprintf(part, sizeof(part), "W: (%02d%%) ", quality);
 189                                 char *ip_address = get_ip_address(wlan_interface);
 190                                 strcpy(part+strlen(part), ip_address);
 191                         }
 192
 193                         return part;
 194                 }
 195                 interfaces = skip_character(interfaces, '\n', 1) + 1;
 196         }
 197
 198         return part;
 199 }
 200
 201 static char *get_ip_address(const char *interface) {
 202         static char part[512];
 203         struct ifreq ifr;
 204         memset(part, '\0', sizeof(part));
 205
 206         int fd = socket(AF_INET, SOCK_DGRAM, 0);
 207
 208         strcpy(ifr.ifr_name, interface);
 209         if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0)
 210                 die("Could not get interface flags (SIOCGIFFLAGS)");
 211
 212         if (!(ifr.ifr_flags & IFF_UP) ||
 213             !(ifr.ifr_flags & IFF_RUNNING)) {
 214                 close(fd);
 215                 return NULL;
 216         }
 217
 218         strcpy(ifr.ifr_name, interface);
 219         ifr.ifr_addr.sa_family = AF_INET;
 220         if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
 221                 struct sockaddr_in addr;
 222                 memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
 223                 inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, sizeof(struct sockaddr_in));
 224                 if (strlen(part) == 0)
 225                         sprintf(part, "no IP");
 226         }
 227
 228         close(fd);
 229         return part;
 230 }
 231
 232 static char *get_eth_info() {
 233         static char part[512];
 234         char *ip_address = get_ip_address(eth_interface);
 235
 236         if (ip_address == NULL)
 237                 snprintf(part, sizeof(part), "E: down");
 238         else snprintf(part, sizeof(part), "E: %s", ip_address);
 239
 240         return part;
 241 }
 242
 243 /*
 244  * Checks if the PID in path is still valid by checking if /proc/<pid> exists
 245  *
 246  */
 247 static bool process_runs(const char *path) {
 248         char pidbuf[512],
 249              procbuf[512];
 250         static glob_t globbuf;
 251         struct stat statbuf;
 252
 253         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
 254                 die("glob() failed");
 255         const char *real_path = (globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
 256         int fd = open(real_path, O_RDONLY);
 257         globfree(&globbuf);
 258         if (fd < 0)
 259                 return false;
 260         read(fd, pidbuf, sizeof(pidbuf));
 261         close(fd);
 262         sprintf(procbuf, "/proc/%s", pidbuf);
 263         return (stat(procbuf, &statbuf) >= 0);
 264 }
 265
 266 int main(void) {
 267         char part[512],
 268              *end;
 269         unsigned int i;
 270
 271         while (1) {
 272                 memset(output, '\0', sizeof(output));
 273                 first_push = true;
 274
 275                 for (i = 0; i < sizeof(run_watches) / sizeof(char*); i += 2) {
 276                         sprintf(part, "%s: %s", run_watches[i], (process_runs(run_watches[i+1]) ? "yes" : "no"));
 277                         push_part(part, strlen(part));
 278                 }
 279
 280                 char *wireless_info = get_wireless_info();
 281                 push_part(wireless_info, strlen(wireless_info));
 282
 283                 char *eth_info = get_eth_info();
 284                 push_part(eth_info, strlen(eth_info));
 285
 286                 char *battery_info = get_battery_info();
 287                 push_part(battery_info, strlen(battery_info));
 288
 289                 /* Get load */
 290                 int load_avg = open("/proc/loadavg", O_RDONLY);
 291                 if (load_avg == -1)
 292                         die("Could not open /proc/loadavg");
 293                 read(load_avg, part, sizeof(part));
 294                 close(load_avg);
 295                 end = skip_character(part, ' ', 3);
 296                 push_part(part, (end-part));
 297
 298                 /* Get date & time */
 299                 time_t current_time = time(NULL);
 300                 struct tm *current_tm = localtime(&current_time);
 301                 strftime(part, sizeof(part), time_format, current_tm);
 302                 push_part(part, strlen(part));
 303
 304                 write_to_statusbar(output);
 305
 306                 sleep(1);
 307         }
 308 }