2 * Generates a status line for use with wmii or other minimal window managers
5 * Copyright (c) 2008-2009 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>
46 #include <sys/ioctl.h>
47 #include <sys/socket.h>
48 #include <netinet/in.h>
49 #include <arpa/inet.h>
53 #include <linux/ethtool.h>
54 #include <linux/sockios.h>
57 #define _IS_WMIISTATUS_C
58 #include "wmiistatus.h"
59 #undef _IS_WMIISTATUS_C
62 /* socket file descriptor for general purposes */
63 static int general_socket;
66 * This function just concats two strings in place, it should only be used
67 * for concatting order to the name of a file or concatting color codes.
68 * Otherwise, the buffer size would have to be increased.
71 static char *concat(const char *str1, const char *str2) {
72 static char concatbuf[32];
73 (void)snprintf(concatbuf, sizeof(concatbuf), "%s%s", str1, str2);
78 * Cleans wmii's /rbar directory by deleting all regular files
81 static void cleanup_rbar_dir() {
84 char pathbuf[strlen(wmii_path)+256+1];
86 if ((dir = opendir(wmii_path)) == NULL)
89 while ((ent = readdir(dir)) != NULL) {
90 if (ent->d_type == DT_REG) {
91 (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, ent->d_name);
92 if (unlink(pathbuf) == -1)
101 * Creates the specified file in wmii's /rbar directory with
102 * correct modes and initializes colors if colormode is enabled
105 static void create_file(const char *name) {
106 char pathbuf[strlen(wmii_path)+256+1];
108 int flags = O_CREAT | O_WRONLY;
111 (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
113 /* Overwrite file's contents if it exists */
114 if (stat(pathbuf, &statbuf) >= 0)
117 if ((fd = open(pathbuf, flags, S_IRUSR | S_IWUSR)) < 0)
120 char *tmp = concat("#888888 ", wmii_normcolors);
121 if (write(fd, tmp, strlen(tmp)) != (ssize_t)strlen(tmp))
128 * Waits until wmii_path/rbar exists (= the filesystem gets mounted),
129 * cleans up all files and creates the needed files
132 static void setup(void) {
137 /* Wait until wmii_path/rbar exists */
138 for (; stat(wmii_path, &statbuf) < 0; sleep(interval));
142 create_file(concat(order[ORDER_WLAN],"wlan"));
144 create_file(concat(order[ORDER_ETH],"eth"));
146 create_file(concat(order[ORDER_BATTERY],"battery"));
147 create_file(concat(order[ORDER_LOAD],"load"));
149 create_file(concat(order[ORDER_TIME],"time"));
150 for (i = 0; i < num_run_watches; i += 2) {
151 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
152 create_file(pathbuf);
158 * Writes the given message in the corresponding file in wmii's /rbar directory
161 static void write_to_statusbar(const char *name, const char *message) {
162 char pathbuf[strlen(wmii_path)+256+1];
165 (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
166 if ((fd = open(pathbuf, O_RDWR)) == -1) {
167 /* Try to re-setup stuff and just continue */
171 if (write(fd, message, strlen(message)) != (ssize_t)strlen(message))
177 * Writes an errormessage to statusbar
180 static void write_error_to_statusbar(const char *message) {
182 create_file("error");
183 write_to_statusbar("error", message);
187 * Write errormessage to statusbar and exit
190 void die(const char *fmt, ...) {
194 (void)vsnprintf(buffer, sizeof(buffer), fmt, ap);
197 if (wmii_path != NULL)
198 write_error_to_statusbar(buffer);
203 * Skip the given character for maximum 'amount' times, returns
204 * a pointer to the first non-'character' character in 'input'.
207 static char *skip_character(char *input, char character, int amount) {
209 size_t len = strlen(input);
212 for (walk = input; ((size_t)(walk - input) < len) && (blanks < amount); walk++)
213 if (*walk == character)
216 return (walk == input ? walk : walk-1);
220 * Get battery information from /sys. Note that it uses the design capacity to
221 * calculate the percentage, not the last full capacity, so you can see how
222 * worn off your battery is.
225 static char *get_battery_info() {
227 static char part[512];
230 int full_design = -1,
233 charging_status_t status = CS_DISCHARGING;
235 if ((fd = open(battery_path, O_RDONLY)) == -1)
236 return "No battery found";
238 memset(part, 0, sizeof(part));
239 (void)read(fd, buf, sizeof(buf));
240 for (walk = buf, last = buf; (walk-buf) < 1024; walk++)
242 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN") ||
243 BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN"))
244 full_design = atoi(walk+1);
245 else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
246 BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
247 remaining = atoi(walk+1);
248 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
249 present_rate = atoi(walk+1);
250 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
251 status = CS_CHARGING;
252 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
254 } else if (*walk == '\n')
258 if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
259 float remaining_time, perc;
260 int seconds, hours, minutes;
261 if (status == CS_CHARGING)
262 remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
263 else if (status == CS_DISCHARGING)
264 remaining_time = ((float)remaining / (float)present_rate);
266 (void)snprintf(part, sizeof(part), "FULL");
269 perc = ((float)remaining / (float)full_design);
271 seconds = (int)(remaining_time * 3600.0);
272 hours = seconds / 3600;
273 seconds -= (hours * 3600);
274 minutes = seconds / 60;
275 seconds -= (minutes * 60);
277 (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
278 (status == CS_CHARGING? "CHR" : "BAT"),
279 (perc * 100), hours, minutes, seconds);
285 * Just parses /proc/net/wireless
288 static char *get_wireless_info() {
290 static char part[512];
293 memset(buf, 0, sizeof(buf));
294 memset(part, 0, sizeof(part));
296 if ((fd = open("/proc/net/wireless", O_RDONLY)) == -1)
297 die("Could not open /proc/net/wireless");
298 (void)read(fd, buf, sizeof(buf));
301 interfaces = skip_character(buf, '\n', 2) + 1;
302 while (interfaces < buf+strlen(buf)) {
303 while (isspace((int)*interfaces))
305 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
307 /* Skip status field (0000) */
308 interfaces += strlen(wlan_interface) + 2;
309 interfaces = skip_character(interfaces, ' ', 1);
310 while (isspace((int)*interfaces))
312 quality = atoi(interfaces);
313 /* For some reason, I get 255 sometimes */
314 if ((quality == 255) || (quality == 0)) {
316 (void)snprintf(part, sizeof(part), "%s%s", concat("#FF0000 ", wmii_normcolors), " W: down");
317 else (void)snprintf(part, sizeof(part), "W: down");
320 const char *ip_address;
321 (void)snprintf(part, sizeof(part), "W: (%03d%%) ", quality);
322 ip_address = get_ip_address(wlan_interface);
323 strcpy(part+strlen(part), ip_address);
328 interfaces = skip_character(interfaces, '\n', 1) + 1;
335 * Return the IP address for the given interface or "no IP" if the
336 * interface is up and running but hasn't got an IP address yet
339 static const char *get_ip_address(const char *interface) {
340 static char part[512];
342 struct sockaddr_in addr;
343 socklen_t len = sizeof(struct sockaddr_in);
344 memset(part, 0, sizeof(part));
346 (void)strcpy(ifr.ifr_name, interface);
347 ifr.ifr_addr.sa_family = AF_INET;
348 if (ioctl(general_socket, SIOCGIFADDR, &ifr) < 0)
351 memcpy(&addr, &ifr.ifr_addr, len);
352 (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, len);
353 if (strlen(part) == 0)
354 (void)snprintf(part, sizeof(part), "no IP");
360 * Combines ethernet IP addresses and speed (if requested) for displaying
363 static char *get_eth_info() {
364 static char part[512];
365 const char *ip_address = get_ip_address(eth_interface);
369 /* This code path requires root privileges */
371 struct ethtool_cmd ecmd;
374 ecmd.cmd = ETHTOOL_GSET;
375 (void)memset(&ifr, 0, sizeof(ifr));
376 ifr.ifr_data = (caddr_t)&ecmd;
377 (void)strcpy(ifr.ifr_name, eth_interface);
378 if ((err = ioctl(general_socket, SIOCETHTOOL, &ifr)) == 0)
379 ethspeed = (ecmd.speed == 65535 ? 0 : ecmd.speed);
380 else get_ethspeed = false;
383 if (ip_address == NULL)
384 (void)snprintf(part, sizeof(part), "E: down");
387 (void)snprintf(part, sizeof(part), "E: %s (%d Mbit/s)", ip_address, ethspeed);
388 else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
395 * Checks if the PID in path is still valid by checking if /proc/<pid> exists
398 static bool process_runs(const char *path) {
403 static glob_t globbuf;
405 const char *real_path;
408 if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
409 die("glob() failed");
410 real_path = (globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
411 fd = open(real_path, O_RDONLY);
415 if ((n = read(fd, pidbuf, sizeof(pidbuf))) > 0)
418 for (walk = pidbuf; *walk != '\0'; walk++)
419 if (!isdigit((int)(*walk))) {
423 (void)snprintf(procbuf, sizeof(procbuf), "/proc/%s", pidbuf);
424 return (stat(procbuf, &statbuf) >= 0);
427 int main(int argc, char *argv[]) {
434 char *configfile = PREFIX "/etc/wmiistatus.conf";
435 int o, option_index = 0;
436 struct option long_options[] = {
437 {"config", required_argument, 0, 'c'},
441 while ((o = getopt_long(argc, argv, "c:", long_options, &option_index)) != -1)
445 if (load_configuration(configfile) < 0)
450 if ((general_socket = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
451 die("Could not create socket");
454 for (i = 0; i < num_run_watches; i += 2) {
455 bool running = process_runs(run_watches[i+1]);
457 snprintf(part, sizeof(part), "%s %s: %s",
459 concat("#00FF00 ", wmii_normcolors) :
460 concat("#FF0000 ", wmii_normcolors)),
462 (running ? "yes" : "no"));
463 else snprintf(part, sizeof(part), "%s: %s", run_watches[i], (running ? "yes" : "no"));
464 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
465 write_to_statusbar(pathbuf, part);
469 write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info());
471 write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info());
473 write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info());
476 if ((load_avg = open("/proc/loadavg", O_RDONLY)) == -1)
477 die("Could not open /proc/loadavg");
478 (void)read(load_avg, part, sizeof(part));
479 (void)close(load_avg);
480 end = skip_character(part, ' ', 3);
482 write_to_statusbar(concat(order[ORDER_LOAD], "load"), part);
485 /* Get date & time */
486 time_t current_time = time(NULL);
487 struct tm *current_tm = localtime(¤t_time);
488 (void)strftime(part, sizeof(part), time_format, current_tm);
489 write_to_statusbar(concat(order[ORDER_TIME], "time"), part);