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>
49 #include "wmiistatus.h"
53 static void write_to_statusbar(const char *message) {
54 int fd = open(wmii_path, O_RDWR);
57 write(fd, message, strlen(message));
62 * Write errormessage to statusbar and exit
65 static void die(const char *message) {
66 write_to_statusbar(message);
70 static char *skip_character(char *input, char character, int amount) {
72 int len = strlen(input),
75 for (walk = input; ((walk - input) < len) && (blanks < amount); walk++)
76 if (*walk == character)
79 return (walk == input ? walk : walk-1);
82 static void push_part(const char *input, const int n) {
86 strncpy(output+strlen(output), " | ", strlen(" | "));
87 strncpy(output+strlen(output), input, n);
91 * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
92 * not the full capacity.
95 static char *get_battery_info() {
97 static char part[512];
98 char *walk, *last = buf;
99 int fd = open("/sys/class/power_supply/BAT0/uevent", O_RDONLY);
101 die("Could not open /sys/class/power_supply/BAT0/uevent");
102 int full_design = -1,
105 charging_status_t status = CS_DISCHARGING;
106 memset(part, '\0', sizeof(part));
107 read(fd, buf, sizeof(buf));
108 for (walk = buf; (walk-buf) < 1024; walk++)
110 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
111 full_design = atoi(walk+1);
112 else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW"))
113 remaining = atoi(walk+1);
114 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
115 present_rate = atoi(walk+1);
116 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
117 status = CS_CHARGING;
118 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
120 } else if (*walk == '\n')
124 if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
125 float remaining_time, perc;
126 if (status == CS_CHARGING)
127 remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
128 else if (status == CS_DISCHARGING)
129 remaining_time = ((float)remaining / (float)present_rate);
131 snprintf(part, sizeof(part), "FULL");
134 perc = ((float)remaining / (float)full_design);
136 int seconds = (int)(remaining_time * 3600.0);
137 int hours = seconds / 3600;
138 seconds -= (hours * 3600);
139 int minutes = seconds / 60;
140 seconds -= (minutes * 60);
142 sprintf(part, "%s %.02f%% %02d:%02d:%02d", (status == CS_CHARGING? "CHR" : "BAT"),
143 (perc * 100), hours, minutes, seconds);
149 * Just parses /proc/net/wireless
152 static char *get_wireless_info() {
154 static char part[512];
156 memset(buf, '\0', sizeof(buf));
157 memset(part, '\0', sizeof(part));
159 int fd = open("/proc/net/wireless", O_RDONLY);
161 die("Could not open /proc/net/wireless");
162 read(fd, buf, sizeof(buf));
165 interfaces = skip_character(buf, '\n', 2) + 1;
166 while (interfaces < buf+strlen(buf)) {
167 while (isspace((int)*interfaces))
169 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
170 /* Skip status field (0000) */
171 interfaces += strlen(wlan_interface) + 2;
172 interfaces = skip_character(interfaces, ' ', 1);
173 while (isspace((int)*interfaces))
175 int quality = atoi(interfaces);
176 /* For some reason, I get 255 sometimes */
177 if ((quality == 255) || (quality == 0))
178 snprintf(part, sizeof(part), "W: down");
180 snprintf(part, sizeof(part), "W: (%02d%%) ", quality);
181 char *ip_address = get_ip_address(wlan_interface);
182 strcpy(part+strlen(part), ip_address);
187 interfaces = skip_character(interfaces, '\n', 1) + 1;
193 static char *get_ip_address(const char *interface) {
194 static char part[512];
196 memset(part, '\0', sizeof(part));
198 int fd = socket(AF_INET, SOCK_DGRAM, 0);
200 strcpy(ifr.ifr_name, interface);
201 if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0)
202 die("Could not get interface flags (SIOCGIFFLAGS)");
204 if (!(ifr.ifr_flags & IFF_UP) ||
205 !(ifr.ifr_flags & IFF_RUNNING)) {
210 strcpy(ifr.ifr_name, interface);
211 ifr.ifr_addr.sa_family = AF_INET;
212 if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
213 struct sockaddr_in addr;
214 memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
215 inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, sizeof(struct sockaddr_in));
216 if (strlen(part) == 0)
217 sprintf(part, "no IP");
224 static char *get_eth_info() {
225 static char part[512];
226 char *ip_address = get_ip_address(eth_interface);
228 if (ip_address == NULL)
229 snprintf(part, sizeof(part), "E: down");
230 else snprintf(part, sizeof(part), "E: %s", ip_address);
241 memset(output, '\0', sizeof(output));
244 char *wireless_info = get_wireless_info();
245 push_part(wireless_info, strlen(wireless_info));
247 char *eth_info = get_eth_info();
248 push_part(eth_info, strlen(eth_info));
250 char *battery_info = get_battery_info();
251 push_part(battery_info, strlen(battery_info));
255 int load_avg = open("/proc/loadavg", O_RDONLY);
256 read(load_avg, part, sizeof(part));
258 end = skip_character(part, ' ', 3);
259 push_part(part, (end-part));
261 /* Get date & time */
262 time_t current_time = time(NULL);
263 struct tm *current_tm = localtime(¤t_time);
264 strftime(part, sizeof(part), "%d.%m.%Y %H:%M:%S", current_tm);
265 push_part(part, strlen(part));
267 printf("output = %s\n", output);
269 int fd = open("/mnt/wmii/rbar/status", O_RDWR);
270 write(fd, output, strlen(output));