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

   1 #include <sys/types.h>
   2 #include <sys/stat.h>
   3 #include <fcntl.h>
   4 #include <string.h>
   5 #include <stdio.h>
   6 #include <time.h>
   7 #include <stdbool.h>
   8 #include <unistd.h>
   9 #include <stdlib.h>
  10 #include <ctype.h>
  11 #include <net/if.h>
  12 #include <sys/ioctl.h>
  13 #include <sys/socket.h>
  14 #include <netinet/in.h>
  15 #include <arpa/inet.h>
  16
  17 const char *wlan_interface = "wlan0";
  18 const char *eth_interface = "eth0";
  19
  20 // TODO: run-watches, z.B.
  21 // "/var/run/dhcp*.pid" --> checkt ob's das file gibt, ob der prozess läuft und zeigt dann yes/no an
  22 // "/var/run/vpnc*.pid"
  23
  24 char output[512];
  25 bool first_push = true;
  26
  27 static char *skip_character(char *input, char character, int amount) {
  28         char *walk;
  29         int len = strlen(input),
  30             blanks = 0;
  31
  32         for (walk = input; ((walk - input) < len) && (blanks < amount); walk++)
  33                 if (*walk == character)
  34                         blanks++;
  35
  36         return (walk == input ? walk : walk-1);
  37 }
  38
  39 static void push_part(const char *input, const int n) {
  40         if (first_push)
  41                 first_push = false;
  42         else
  43                 strncpy(output+strlen(output), " | ", strlen(" | "));
  44         strncpy(output+strlen(output), input, n);
  45 }
  46
  47 /*
  48  * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
  49  * not the full capacity.
  50  *
  51  */
  52 static char *get_battery_info() {
  53         char buf[1024];
  54         static char output[512];
  55         char *walk, *last = buf;
  56         int fd = open("/sys/class/power_supply/BAT0/uevent", O_RDONLY);
  57         int full_design = -1,
  58             remaining = -1,
  59             present_rate = -1;
  60         bool charging = false;
  61         memset(output, '\0', sizeof(output));
  62         read(fd, buf, sizeof(buf));
  63         for (walk = buf; (walk-buf) < 1024; walk++)
  64                 if (*walk == '=') {
  65                         if (strncmp(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN", strlen("POWER_SUPPLY_ENERGY_FULL_DESIGN")) == 0)
  66                                 full_design = atoi(walk+1);
  67                         else if (strncmp(last, "POWER_SUPPLY_ENERGY_NOW", strlen("POWER_SUPPLY_ENERGY_NOW")) == 0)
  68                                 remaining = atoi(walk+1);
  69                         else if (strncmp(last, "POWER_SUPPLY_CURRENT_NOW", strlen("POWER_SUPPLY_CURRENT_NOW")) == 0)
  70                                 present_rate = atoi(walk+1);
  71                         else if (strncmp(last, "POWER_SUPPLY_STATUS=Charging", strlen("POWER_SUPPLY_STATUS=Charging")) == 0)
  72                                 charging = true;
  73                 } else if (*walk == '\n')
  74                         last = walk+1;
  75         close(fd);
  76
  77         if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
  78                 float time, perc;
  79                 if (charging)
  80                         time = ((float)full_design - (float)remaining) / (float)present_rate;
  81                 else time = ((float)remaining / (float)present_rate);
  82                 perc = ((float)remaining / (float)full_design);
  83
  84                 int seconds = (int)(time * 3600.0);
  85                 int hours = seconds / 3600;
  86                 seconds -= (hours * 3600);
  87                 int minutes = seconds / 60;
  88                 seconds -= (minutes * 60);
  89
  90                 sprintf(output, "%s %.02f%% %02d:%02d:%02d", (charging ? "CHR" : "BAT"), (perc * 100), hours, minutes, seconds);
  91         }
  92         return output;
  93 }
  94
  95 /*
  96  * Just parses /proc/net/wireless
  97  *
  98  */
  99 static char *get_wireless_info() {
 100         char buf[1024];
 101         static char output[512];
 102         char *interfaces;
 103         memset(buf, '\0', sizeof(buf));
 104         memset(output, '\0', sizeof(output));
 105
 106         int fd = open("/proc/net/wireless", O_RDONLY);
 107         read(fd, buf, sizeof(buf));
 108         close(fd);
 109
 110         interfaces = skip_character(buf, '\n', 2) + 1;
 111         while (interfaces < buf+strlen(buf)) {
 112                 while (isspace((int)*interfaces))
 113                         interfaces++;
 114                 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
 115                         /* Skip status field (0000) */
 116                         interfaces += strlen(wlan_interface) + 2;
 117                         interfaces = skip_character(interfaces, ' ', 1);
 118                         while (isspace((int)*interfaces))
 119                                 interfaces++;
 120                         int quality = atoi(interfaces);
 121                         /* For some reason, I get 255 sometimes */
 122                         if (quality == 255)
 123                                 quality = 0;
 124                         snprintf(output, sizeof(output), "W: (%02d%%) ", quality);
 125                         return output;
 126                 }
 127                 interfaces = skip_character(interfaces, '\n', 1) + 1;
 128         }
 129
 130         return output;
 131 }
 132
 133 static char *get_eth_info() {
 134         static char output[512];
 135         struct ifreq ifr;
 136         memset(output, '\0', sizeof(output));
 137
 138         int fd = socket(AF_INET, SOCK_DGRAM, 0);
 139
 140         strcpy(ifr.ifr_name, eth_interface);
 141         if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
 142                 printf("böses fehler\n");
 143                 /* TODO: errorhandling */
 144         }
 145         if (!(ifr.ifr_flags & IFF_UP) ||
 146             !(ifr.ifr_flags & IFF_RUNNING)) {
 147                 sprintf(output, "E: down");
 148                 close(fd);
 149                 return output;
 150         }
 151
 152         strcpy(ifr.ifr_name, eth_interface);
 153         ifr.ifr_addr.sa_family = AF_INET;
 154         if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
 155                 struct sockaddr_in addr;
 156                 memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
 157                 inet_ntop(AF_INET, &addr.sin_addr.s_addr, output+3, sizeof(struct sockaddr_in));
 158                 strncpy(output, "E: ", strlen("E: "));
 159                 if (strlen(output) == 0)
 160                         sprintf(output, "E: no IP");
 161         }
 162
 163         close(fd);
 164         return output;
 165 }
 166
 167 int main() {
 168         char part[512],
 169              *end;
 170
 171         while (1) {
 172                 memset(output, '\0', sizeof(output));
 173                 first_push = true;
 174
 175                 char *wireless_info = get_wireless_info();
 176                 push_part(wireless_info, strlen(wireless_info));
 177
 178                 char *eth_info = get_eth_info();
 179                 push_part(eth_info, strlen(eth_info));
 180
 181                 char *battery_info = get_battery_info();
 182                 push_part(battery_info, strlen(battery_info));
 183
 184
 185                 /* Get load */
 186                 int load_avg = open("/proc/loadavg", O_RDONLY);
 187                 read(load_avg, part, sizeof(part));
 188                 close(load_avg);
 189                 end = skip_character(part, ' ', 3);
 190                 push_part(part, (end-part));
 191
 192                 /* Get date & time */
 193                 time_t current_time = time(NULL);
 194                 struct tm *current_tm = localtime(&current_time);
 195                 strftime(part, sizeof(part), "%d.%m.%Y %H:%M:%S", current_tm);
 196                 push_part(part, strlen(part));
 197
 198                 printf("output = %s\n", output);
 199
 200                 int fd = open("/mnt/wmii/rbar/status", O_RDWR);
 201                 write(fd, output, strlen(output));
 202                 close(fd);
 203
 204                 sleep(1);
 205         }
 206 }