Initial commit

diff --git a/Makefile b/Makefile
new file mode 100644 (file)
index 0000000..1d1250d
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,2 @@
+all:
+       gcc -Wall -O2 -o wmiistatus wmiistatus.c

diff --git a/wmiistatus.c b/wmiistatus.c
new file mode 100644 (file)
index 0000000..d6ebc14
--- /dev/null
+++ b/wmiistatus.c
@@ -0,0 +1,206 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdio.h>
+#include <time.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+const char *wlan_interface = "wlan0";
+const char *eth_interface = "eth0";
+
+// TODO: run-watches, z.B.
+// "/var/run/dhcp*.pid" --> checkt ob's das file gibt, ob der prozess läuft und zeigt dann yes/no an
+// "/var/run/vpnc*.pid"
+
+char output[512];
+bool first_push = true;
+
+static char *skip_character(char *input, char character, int amount) {
+       char *walk;
+       int len = strlen(input),
+           blanks = 0;
+
+       for (walk = input; ((walk - input) < len) && (blanks < amount); walk++)
+               if (*walk == character)
+                       blanks++;
+
+       return (walk == input ? walk : walk-1);
+}
+
+static void push_part(const char *input, const int n) {
+       if (first_push)
+               first_push = false;
+       else
+               strncpy(output+strlen(output), " | ", strlen(" | "));
+       strncpy(output+strlen(output), input, n);
+}
+
+/*
+ * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
+ * not the full capacity.
+ *
+ */
+static char *get_battery_info() {
+       char buf[1024];
+       static char output[512];
+       char *walk, *last = buf;
+       int fd = open("/sys/class/power_supply/BAT0/uevent", O_RDONLY);
+       int full_design = -1,
+           remaining = -1,
+           present_rate = -1;
+       bool charging = false;
+       memset(output, '\0', sizeof(output));
+       read(fd, buf, sizeof(buf));
+       for (walk = buf; (walk-buf) < 1024; walk++)
+               if (*walk == '=') {
+                       if (strncmp(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN", strlen("POWER_SUPPLY_ENERGY_FULL_DESIGN")) == 0)
+                               full_design = atoi(walk+1);
+                       else if (strncmp(last, "POWER_SUPPLY_ENERGY_NOW", strlen("POWER_SUPPLY_ENERGY_NOW")) == 0)
+                               remaining = atoi(walk+1);
+                       else if (strncmp(last, "POWER_SUPPLY_CURRENT_NOW", strlen("POWER_SUPPLY_CURRENT_NOW")) == 0)
+                               present_rate = atoi(walk+1);
+                       else if (strncmp(last, "POWER_SUPPLY_STATUS=Charging", strlen("POWER_SUPPLY_STATUS=Charging")) == 0)
+                               charging = true;
+               } else if (*walk == '\n')
+                       last = walk+1;
+       close(fd);
+
+       if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
+               float time, perc;
+               if (charging)
+                       time = ((float)full_design - (float)remaining) / (float)present_rate;
+               else time = ((float)remaining / (float)present_rate);
+               perc = ((float)remaining / (float)full_design);
+
+               int seconds = (int)(time * 3600.0);
+               int hours = seconds / 3600;
+               seconds -= (hours * 3600);
+               int minutes = seconds / 60;
+               seconds -= (minutes * 60);
+
+               sprintf(output, "%s %.02f%% %02d:%02d:%02d", (charging ? "CHR" : "BAT"), (perc * 100), hours, minutes, seconds);
+       }
+       return output;
+}
+
+/*
+ * Just parses /proc/net/wireless
+ *
+ */
+static char *get_wireless_info() {
+       char buf[1024];
+       static char output[512];
+       char *interfaces;
+       memset(buf, '\0', sizeof(buf));
+       memset(output, '\0', sizeof(output));
+
+       int fd = open("/proc/net/wireless", O_RDONLY);
+       read(fd, buf, sizeof(buf));
+       close(fd);
+
+       interfaces = skip_character(buf, '\n', 2) + 1;
+       while (interfaces < buf+strlen(buf)) {
+               while (isspace((int)*interfaces))
+                       interfaces++;
+               if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
+                       /* Skip status field (0000) */
+                       interfaces += strlen(wlan_interface) + 2;
+                       interfaces = skip_character(interfaces, ' ', 1);
+                       while (isspace((int)*interfaces))
+                               interfaces++;
+                       int quality = atoi(interfaces);
+                       /* For some reason, I get 255 sometimes */
+                       if (quality == 255)
+                               quality = 0;
+                       snprintf(output, sizeof(output), "W: (%02d%%) ", quality);
+                       return output;
+               }
+               interfaces = skip_character(interfaces, '\n', 1) + 1;
+       }
+
+       return output;
+}
+
+static char *get_eth_info() {
+       static char output[512];
+       struct ifreq ifr;
+       memset(output, '\0', sizeof(output));
+
+       int fd = socket(AF_INET, SOCK_DGRAM, 0);
+
+       strcpy(ifr.ifr_name, eth_interface);
+       if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
+               printf("böses fehler\n");
+               /* TODO: errorhandling */
+       }
+       if (!(ifr.ifr_flags & IFF_UP) ||
+           !(ifr.ifr_flags & IFF_RUNNING)) {
+               sprintf(output, "E: down");
+               close(fd);
+               return output;
+       }
+
+       strcpy(ifr.ifr_name, eth_interface);
+       ifr.ifr_addr.sa_family = AF_INET;
+       if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
+               struct sockaddr_in addr;
+               memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
+               inet_ntop(AF_INET, &addr.sin_addr.s_addr, output+3, sizeof(struct sockaddr_in));
+               strncpy(output, "E: ", strlen("E: "));
+               if (strlen(output) == 0)
+                       sprintf(output, "E: no IP");
+       }
+
+       close(fd);
+       return output;
+}
+
+int main() {
+       char part[512],
+            *end;
+
+       while (1) {
+               memset(output, '\0', sizeof(output));
+               first_push = true;
+
+               char *wireless_info = get_wireless_info();
+               push_part(wireless_info, strlen(wireless_info));
+
+               char *eth_info = get_eth_info();
+               push_part(eth_info, strlen(eth_info));
+
+               char *battery_info = get_battery_info();
+               push_part(battery_info, strlen(battery_info));
+
+               
+               /* Get load */
+               int load_avg = open("/proc/loadavg", O_RDONLY);
+               read(load_avg, part, sizeof(part));
+               close(load_avg);
+               end = skip_character(part, ' ', 3);
+               push_part(part, (end-part));
+
+               /* Get date & time */
+               time_t current_time = time(NULL);
+               struct tm *current_tm = localtime(&current_time);
+               strftime(part, sizeof(part), "%d.%m.%Y %H:%M:%S", current_tm);
+               push_part(part, strlen(part));
+
+               printf("output = %s\n", output);
+
+               int fd = open("/mnt/wmii/rbar/status", O_RDWR);
+               write(fd, output, strlen(output));
+               close(fd);
+
+               sleep(1);
+       }
+}