2 * Generates a status line for use with wmii or other minimal window managers
5 * Copyright (c) 2008 Michael Stapelberg and contributors
8 * Redistribution and use in source and binary forms, with or without modification,
9 * are permitted provided that the following conditions are met:
11 * * Redistributions of source code must retain the above copyright notice, this
12 * list of conditions and the following disclaimer.
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.
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.
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
34 #include <sys/types.h>
45 #include <sys/ioctl.h>
46 #include <sys/socket.h>
47 #include <netinet/in.h>
48 #include <arpa/inet.h>
50 const char *wlan_interface = "wlan0";
51 const char *eth_interface = "eth0";
53 // TODO: run-watches, z.B.
54 // "/var/run/dhcp*.pid" --> checkt ob's das file gibt, ob der prozess läuft und zeigt dann yes/no an
55 // "/var/run/vpnc*.pid"
58 bool first_push = true;
60 static char *skip_character(char *input, char character, int amount) {
62 int len = strlen(input),
65 for (walk = input; ((walk - input) < len) && (blanks < amount); walk++)
66 if (*walk == character)
69 return (walk == input ? walk : walk-1);
72 static void push_part(const char *input, const int n) {
76 strncpy(output+strlen(output), " | ", strlen(" | "));
77 strncpy(output+strlen(output), input, n);
81 * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
82 * not the full capacity.
85 static char *get_battery_info() {
87 static char output[512];
88 char *walk, *last = buf;
89 int fd = open("/sys/class/power_supply/BAT0/uevent", O_RDONLY);
93 bool charging = false;
94 memset(output, '\0', sizeof(output));
95 read(fd, buf, sizeof(buf));
97 for (walk = buf; (walk-buf) < 1024; walk++)
99 if (strncmp(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN", strlen("POWER_SUPPLY_ENERGY_FULL_DESIGN")) == 0)
100 full_design = atoi(walk+1);
101 else if (strncmp(last, "POWER_SUPPLY_ENERGY_NOW", strlen("POWER_SUPPLY_ENERGY_NOW")) == 0)
102 remaining = atoi(walk+1);
103 else if (strncmp(last, "POWER_SUPPLY_CURRENT_NOW", strlen("POWER_SUPPLY_CURRENT_NOW")) == 0)
104 present_rate = atoi(walk+1);
105 else if (strncmp(last, "POWER_SUPPLY_STATUS=Charging", strlen("POWER_SUPPLY_STATUS=Charging")) == 0)
107 } else if (*walk == '\n')
111 if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
114 time = ((float)full_design - (float)remaining) / (float)present_rate;
115 else time = ((float)remaining / (float)present_rate);
116 perc = ((float)remaining / (float)full_design);
118 int seconds = (int)(time * 3600.0);
119 int hours = seconds / 3600;
120 seconds -= (hours * 3600);
121 int minutes = seconds / 60;
122 seconds -= (minutes * 60);
124 sprintf(output, "%s %.02f%% %02d:%02d:%02d", (charging ? "CHR" : "BAT"), (perc * 100), hours, minutes, seconds);
130 * Just parses /proc/net/wireless
133 static char *get_wireless_info() {
135 static char output[512];
137 memset(buf, '\0', sizeof(buf));
138 memset(output, '\0', sizeof(output));
140 int fd = open("/proc/net/wireless", O_RDONLY);
141 read(fd, buf, sizeof(buf));
144 interfaces = skip_character(buf, '\n', 2) + 1;
145 while (interfaces < buf+strlen(buf)) {
146 while (isspace((int)*interfaces))
148 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
149 /* Skip status field (0000) */
150 interfaces += strlen(wlan_interface) + 2;
151 interfaces = skip_character(interfaces, ' ', 1);
152 while (isspace((int)*interfaces))
154 int quality = atoi(interfaces);
155 /* For some reason, I get 255 sometimes */
156 if ((quality == 255) || (quality == 0))
157 snprintf(output, sizeof(output), "W: down");
158 else snprintf(output, sizeof(output), "W: (%02d%%) ", quality);
159 // TODO: get IP address
162 interfaces = skip_character(interfaces, '\n', 1) + 1;
168 static char *get_eth_info() {
169 static char output[512];
171 memset(output, '\0', sizeof(output));
173 int fd = socket(AF_INET, SOCK_DGRAM, 0);
175 strcpy(ifr.ifr_name, eth_interface);
176 if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
177 printf("böses fehler\n");
178 /* TODO: errorhandling */
180 if (!(ifr.ifr_flags & IFF_UP) ||
181 !(ifr.ifr_flags & IFF_RUNNING)) {
182 sprintf(output, "E: down");
187 strcpy(ifr.ifr_name, eth_interface);
188 ifr.ifr_addr.sa_family = AF_INET;
189 if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
190 struct sockaddr_in addr;
191 memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
192 inet_ntop(AF_INET, &addr.sin_addr.s_addr, output+3, sizeof(struct sockaddr_in));
193 strncpy(output, "E: ", strlen("E: "));
194 if (strlen(output) == 0)
195 sprintf(output, "E: no IP");
207 memset(output, '\0', sizeof(output));
210 char *wireless_info = get_wireless_info();
211 push_part(wireless_info, strlen(wireless_info));
213 char *eth_info = get_eth_info();
214 push_part(eth_info, strlen(eth_info));
216 char *battery_info = get_battery_info();
217 push_part(battery_info, strlen(battery_info));
221 int load_avg = open("/proc/loadavg", O_RDONLY);
222 read(load_avg, part, sizeof(part));
224 end = skip_character(part, ' ', 3);
225 push_part(part, (end-part));
227 /* Get date & time */
228 time_t current_time = time(NULL);
229 struct tm *current_tm = localtime(¤t_time);
230 strftime(part, sizeof(part), "%d.%m.%Y %H:%M:%S", current_tm);
231 push_part(part, strlen(part));
233 printf("output = %s\n", output);
235 int fd = open("/mnt/wmii/rbar/status", O_RDWR);
236 write(fd, output, strlen(output));