242 lines
7.2 KiB
C
242 lines
7.2 KiB
C
/*
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* Generates a status line for use with wmii or other minimal window managers
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*
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*
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* Copyright (c) 2008 Michael Stapelberg and contributors
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* * Neither the name of Michael Stapelberg nor the names of contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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#include <stdio.h>
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#include <time.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <net/if.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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const char *wlan_interface = "wlan0";
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const char *eth_interface = "eth0";
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// TODO: run-watches, z.B.
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// "/var/run/dhcp*.pid" --> checkt ob's das file gibt, ob der prozess läuft und zeigt dann yes/no an
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// "/var/run/vpnc*.pid"
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char output[512];
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bool first_push = true;
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static char *skip_character(char *input, char character, int amount) {
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char *walk;
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int len = strlen(input),
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blanks = 0;
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for (walk = input; ((walk - input) < len) && (blanks < amount); walk++)
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if (*walk == character)
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blanks++;
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return (walk == input ? walk : walk-1);
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}
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static void push_part(const char *input, const int n) {
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if (first_push)
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first_push = false;
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else
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strncpy(output+strlen(output), " | ", strlen(" | "));
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strncpy(output+strlen(output), input, n);
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}
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/*
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* Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
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* not the full capacity.
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*
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*/
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static char *get_battery_info() {
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char buf[1024];
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static char output[512];
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char *walk, *last = buf;
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int fd = open("/sys/class/power_supply/BAT0/uevent", O_RDONLY);
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int full_design = -1,
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remaining = -1,
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present_rate = -1;
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bool charging = false;
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memset(output, '\0', sizeof(output));
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read(fd, buf, sizeof(buf));
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/* TODO: charged */
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for (walk = buf; (walk-buf) < 1024; walk++)
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if (*walk == '=') {
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if (strncmp(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN", strlen("POWER_SUPPLY_ENERGY_FULL_DESIGN")) == 0)
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full_design = atoi(walk+1);
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else if (strncmp(last, "POWER_SUPPLY_ENERGY_NOW", strlen("POWER_SUPPLY_ENERGY_NOW")) == 0)
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remaining = atoi(walk+1);
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else if (strncmp(last, "POWER_SUPPLY_CURRENT_NOW", strlen("POWER_SUPPLY_CURRENT_NOW")) == 0)
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present_rate = atoi(walk+1);
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else if (strncmp(last, "POWER_SUPPLY_STATUS=Charging", strlen("POWER_SUPPLY_STATUS=Charging")) == 0)
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charging = true;
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} else if (*walk == '\n')
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last = walk+1;
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close(fd);
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if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
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float time, perc;
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if (charging)
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time = ((float)full_design - (float)remaining) / (float)present_rate;
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else time = ((float)remaining / (float)present_rate);
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perc = ((float)remaining / (float)full_design);
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int seconds = (int)(time * 3600.0);
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int hours = seconds / 3600;
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seconds -= (hours * 3600);
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int minutes = seconds / 60;
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seconds -= (minutes * 60);
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sprintf(output, "%s %.02f%% %02d:%02d:%02d", (charging ? "CHR" : "BAT"), (perc * 100), hours, minutes, seconds);
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}
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return output;
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}
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/*
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* Just parses /proc/net/wireless
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*
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*/
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static char *get_wireless_info() {
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char buf[1024];
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static char output[512];
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char *interfaces;
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memset(buf, '\0', sizeof(buf));
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memset(output, '\0', sizeof(output));
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int fd = open("/proc/net/wireless", O_RDONLY);
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read(fd, buf, sizeof(buf));
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close(fd);
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interfaces = skip_character(buf, '\n', 2) + 1;
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while (interfaces < buf+strlen(buf)) {
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while (isspace((int)*interfaces))
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interfaces++;
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if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
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/* Skip status field (0000) */
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interfaces += strlen(wlan_interface) + 2;
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interfaces = skip_character(interfaces, ' ', 1);
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while (isspace((int)*interfaces))
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interfaces++;
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int quality = atoi(interfaces);
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/* For some reason, I get 255 sometimes */
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if ((quality == 255) || (quality == 0))
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snprintf(output, sizeof(output), "W: down");
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else snprintf(output, sizeof(output), "W: (%02d%%) ", quality);
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// TODO: get IP address
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return output;
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}
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interfaces = skip_character(interfaces, '\n', 1) + 1;
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}
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return output;
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}
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static char *get_eth_info() {
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static char output[512];
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struct ifreq ifr;
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memset(output, '\0', sizeof(output));
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int fd = socket(AF_INET, SOCK_DGRAM, 0);
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strcpy(ifr.ifr_name, eth_interface);
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if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
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printf("böses fehler\n");
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/* TODO: errorhandling */
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}
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if (!(ifr.ifr_flags & IFF_UP) ||
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!(ifr.ifr_flags & IFF_RUNNING)) {
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sprintf(output, "E: down");
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close(fd);
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return output;
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}
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strcpy(ifr.ifr_name, eth_interface);
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ifr.ifr_addr.sa_family = AF_INET;
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if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
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struct sockaddr_in addr;
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memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
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inet_ntop(AF_INET, &addr.sin_addr.s_addr, output+3, sizeof(struct sockaddr_in));
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strncpy(output, "E: ", strlen("E: "));
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if (strlen(output) == 0)
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sprintf(output, "E: no IP");
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}
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close(fd);
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return output;
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}
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int main() {
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char part[512],
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*end;
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while (1) {
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memset(output, '\0', sizeof(output));
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first_push = true;
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char *wireless_info = get_wireless_info();
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push_part(wireless_info, strlen(wireless_info));
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char *eth_info = get_eth_info();
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push_part(eth_info, strlen(eth_info));
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char *battery_info = get_battery_info();
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push_part(battery_info, strlen(battery_info));
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/* Get load */
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int load_avg = open("/proc/loadavg", O_RDONLY);
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read(load_avg, part, sizeof(part));
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close(load_avg);
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end = skip_character(part, ' ', 3);
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push_part(part, (end-part));
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/* Get date & time */
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time_t current_time = time(NULL);
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struct tm *current_tm = localtime(¤t_time);
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strftime(part, sizeof(part), "%d.%m.%Y %H:%M:%S", current_tm);
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push_part(part, strlen(part));
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printf("output = %s\n", output);
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int fd = open("/mnt/wmii/rbar/status", O_RDWR);
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write(fd, output, strlen(output));
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close(fd);
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sleep(1);
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}
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}
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