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
63 * This function just concats two strings in place, it should only be used
64 * for concatting order to the name of a file or concatting color codes.
65 * Otherwise, the buffer size would have to be increased.
68 static char *concat(const char *str1, const char *str2) {
69 static char concatbuf[32];
70 (void)snprintf(concatbuf, sizeof(concatbuf), "%s%s", str1, str2);
75 * Cleans wmii's /rbar directory by deleting all regular files
78 static void cleanup_rbar_dir() {
81 char pathbuf[strlen(wmii_path)+256+1];
83 if ((dir = opendir(wmii_path)) == NULL)
86 while ((ent = readdir(dir)) != NULL) {
87 if (ent->d_type == DT_REG) {
88 (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, ent->d_name);
89 if (unlink(pathbuf) == -1)
98 * Creates the specified file in wmii's /rbar directory with
99 * correct modes and initializes colors if colormode is enabled
102 static void create_file(const char *name) {
103 char pathbuf[strlen(wmii_path)+256+1];
105 int flags = O_CREAT | O_WRONLY;
108 (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
110 /* Overwrite file's contents if it exists */
111 if (stat(pathbuf, &statbuf) >= 0)
114 if ((fd = open(pathbuf, flags, S_IRUSR | S_IWUSR)) < 0)
117 char *tmp = concat("#888888 ", wmii_normcolors);
118 if (write(fd, tmp, strlen(tmp)) != (ssize_t)strlen(tmp))
125 * Waits until wmii_path/rbar exists (= the filesystem gets mounted),
126 * cleans up all files and creates the needed files
129 static void setup(void) {
134 /* Wait until wmii_path/rbar exists */
135 for (; stat(wmii_path, &statbuf) < 0; sleep(interval));
139 create_file(concat(order[ORDER_WLAN],"wlan"));
141 create_file(concat(order[ORDER_ETH],"eth"));
143 create_file(concat(order[ORDER_BATTERY],"battery"));
144 create_file(concat(order[ORDER_LOAD],"load"));
146 create_file(concat(order[ORDER_TIME],"time"));
147 for (i = 0; i < num_run_watches; i += 2) {
148 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
149 create_file(pathbuf);
155 * Writes the given message in the corresponding file in wmii's /rbar directory
158 static void write_to_statusbar(const char *name, const char *message) {
159 char pathbuf[strlen(wmii_path)+256+1];
162 (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
163 if ((fd = open(pathbuf, O_RDWR)) == -1) {
164 /* Try to re-setup stuff and just continue */
168 if (write(fd, message, strlen(message)) != (ssize_t)strlen(message))
174 * Writes an errormessage to statusbar
177 static void write_error_to_statusbar(const char *message) {
179 create_file("error");
180 write_to_statusbar("error", message);
184 * Write errormessage to statusbar and exit
187 void die(const char *fmt, ...) {
191 (void)vsnprintf(buffer, sizeof(buffer), fmt, ap);
194 if (wmii_path != NULL)
195 write_error_to_statusbar(buffer);
200 * Skip the given character for maximum 'amount' times, returns
201 * a pointer to the first non-'character' character in 'input'.
204 static char *skip_character(char *input, char character, int amount) {
206 size_t len = strlen(input);
209 for (walk = input; ((size_t)(walk - input) < len) && (blanks < amount); walk++)
210 if (*walk == character)
213 return (walk == input ? walk : walk-1);
217 * Get battery information from /sys. Note that it uses the design capacity to
218 * calculate the percentage, not the last full capacity, so you can see how
219 * worn off your battery is.
222 static char *get_battery_info() {
224 static char part[512];
227 int full_design = -1,
230 charging_status_t status = CS_DISCHARGING;
232 if ((fd = open(battery_path, O_RDONLY)) == -1)
233 return "No battery found";
235 memset(part, 0, sizeof(part));
236 (void)read(fd, buf, sizeof(buf));
237 for (walk = buf, last = buf; (walk-buf) < 1024; walk++)
239 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN") ||
240 BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN"))
241 full_design = atoi(walk+1);
242 else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
243 BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
244 remaining = atoi(walk+1);
245 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
246 present_rate = atoi(walk+1);
247 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
248 status = CS_CHARGING;
249 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
251 } else if (*walk == '\n')
255 if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
256 float remaining_time, perc;
257 int seconds, hours, minutes;
258 if (status == CS_CHARGING)
259 remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
260 else if (status == CS_DISCHARGING)
261 remaining_time = ((float)remaining / (float)present_rate);
263 (void)snprintf(part, sizeof(part), "FULL");
266 perc = ((float)remaining / (float)full_design);
268 seconds = (int)(remaining_time * 3600.0);
269 hours = seconds / 3600;
270 seconds -= (hours * 3600);
271 minutes = seconds / 60;
272 seconds -= (minutes * 60);
274 (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
275 (status == CS_CHARGING? "CHR" : "BAT"),
276 (perc * 100), hours, minutes, seconds);
282 * Just parses /proc/net/wireless
285 static char *get_wireless_info() {
287 static char part[512];
290 memset(buf, 0, sizeof(buf));
291 memset(part, 0, sizeof(part));
293 if ((fd = open("/proc/net/wireless", O_RDONLY)) == -1)
294 die("Could not open /proc/net/wireless");
295 (void)read(fd, buf, sizeof(buf));
298 interfaces = skip_character(buf, '\n', 2) + 1;
299 while (interfaces < buf+strlen(buf)) {
300 while (isspace((int)*interfaces))
302 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
304 /* Skip status field (0000) */
305 interfaces += strlen(wlan_interface) + 2;
306 interfaces = skip_character(interfaces, ' ', 1);
307 while (isspace((int)*interfaces))
309 quality = atoi(interfaces);
310 /* For some reason, I get 255 sometimes */
311 if ((quality == 255) || (quality == 0)) {
313 (void)snprintf(part, sizeof(part), "%s%s", concat("#FF0000 ", wmii_normcolors), " W: down");
314 else (void)snprintf(part, sizeof(part), "W: down");
317 const char *ip_address;
318 (void)snprintf(part, sizeof(part), "W: (%03d%%) ", quality);
319 ip_address = get_ip_address(wlan_interface);
320 strcpy(part+strlen(part), ip_address);
325 interfaces = skip_character(interfaces, '\n', 1) + 1;
332 * Return the IP address for the given interface or "no IP" if the
333 * interface is up and running but hasn't got an IP address yet
336 static const char *get_ip_address(const char *interface) {
337 static char part[512];
340 memset(part, 0, sizeof(part));
342 if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
343 die("Could not create socket");
345 strcpy(ifr.ifr_name, interface);
346 if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0)
347 die("Could not get interface flags (SIOCGIFFLAGS)");
349 if (!(ifr.ifr_flags & IFF_UP) ||
350 !(ifr.ifr_flags & IFF_RUNNING)) {
355 (void)strcpy(ifr.ifr_name, interface);
356 ifr.ifr_addr.sa_family = AF_INET;
357 if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
358 struct sockaddr_in addr;
359 memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
360 (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, (socklen_t)sizeof(struct sockaddr_in));
361 if (strlen(part) == 0)
362 snprintf(part, sizeof(part), "no IP");
370 * Combines ethernet IP addresses and speed (if requested) for displaying
373 static char *get_eth_info() {
374 static char part[512];
375 const char *ip_address = get_ip_address(eth_interface);
379 /* This code path requires root privileges */
381 struct ethtool_cmd ecmd;
384 if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
385 write_error_to_statusbar("Could not open socket");
387 ecmd.cmd = ETHTOOL_GSET;
388 (void)memset(&ifr, 0, sizeof(ifr));
389 ifr.ifr_data = (caddr_t)&ecmd;
390 (void)strcpy(ifr.ifr_name, eth_interface);
391 if ((err = ioctl(fd, SIOCETHTOOL, &ifr)) == 0)
392 ethspeed = (ecmd.speed == 65535 ? 0 : ecmd.speed);
393 else get_ethspeed = false;
398 if (ip_address == NULL)
399 (void)snprintf(part, sizeof(part), "E: down");
402 (void)snprintf(part, sizeof(part), "E: %s (%d Mbit/s)", ip_address, ethspeed);
403 else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
410 * Checks if the PID in path is still valid by checking if /proc/<pid> exists
413 static bool process_runs(const char *path) {
418 static glob_t globbuf;
420 const char *real_path;
423 if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
424 die("glob() failed");
425 real_path = (globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
426 fd = open(real_path, O_RDONLY);
430 if ((n = read(fd, pidbuf, sizeof(pidbuf))) > 0)
433 for (walk = pidbuf; *walk != '\0'; walk++)
434 if (!isdigit((int)(*walk))) {
438 (void)snprintf(procbuf, sizeof(procbuf), "/proc/%s", pidbuf);
439 return (stat(procbuf, &statbuf) >= 0);
442 int main(int argc, char *argv[]) {
449 char *configfile = PREFIX "/etc/wmiistatus.conf";
450 int o, option_index = 0;
451 struct option long_options[] = {
452 {"config", required_argument, 0, 'c'},
456 while ((o = getopt_long(argc, argv, "c:", long_options, &option_index)) != -1)
460 if (load_configuration(configfile) < 0)
466 for (i = 0; i < num_run_watches; i += 2) {
467 bool running = process_runs(run_watches[i+1]);
469 snprintf(part, sizeof(part), "%s %s: %s",
471 concat("#00FF00 ", wmii_normcolors) :
472 concat("#FF0000 ", wmii_normcolors)),
474 (running ? "yes" : "no"));
475 else snprintf(part, sizeof(part), "%s: %s", run_watches[i], (running ? "yes" : "no"));
476 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
477 write_to_statusbar(pathbuf, part);
481 write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info());
483 write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info());
485 write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info());
488 if ((load_avg = open("/proc/loadavg", O_RDONLY)) == -1)
489 die("Could not open /proc/loadavg");
490 (void)read(load_avg, part, sizeof(part));
491 (void)close(load_avg);
492 end = skip_character(part, ' ', 3);
494 write_to_statusbar(concat(order[ORDER_LOAD], "load"), part);
497 /* Get date & time */
498 time_t current_time = time(NULL);
499 struct tm *current_tm = localtime(¤t_time);
500 (void)strftime(part, sizeof(part), time_format, current_tm);
501 write_to_statusbar(concat(order[ORDER_TIME], "time"), part);