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>
47 #include <sys/ioctl.h>
48 #include <sys/socket.h>
49 #include <netinet/in.h>
50 #include <arpa/inet.h>
55 #include <linux/ethtool.h>
56 #include <linux/sockios.h>
59 #define _IS_WMIISTATUS_C
60 #include "wmiistatus.h"
61 #undef _IS_WMIISTATUS_C
64 /* socket file descriptor for general purposes */
65 static int general_socket;
68 * This function just concats two strings in place, it should only be used
69 * for concatting order to the name of a file or concatting color codes.
70 * Otherwise, the buffer size would have to be increased.
73 static char *concat(const char *str1, const char *str2) {
74 static char concatbuf[32];
75 (void)snprintf(concatbuf, sizeof(concatbuf), "%s%s", str1, str2);
80 * Cleans wmii's /rbar directory by deleting all regular files
83 static void cleanup_rbar_dir() {
86 char pathbuf[strlen(wmii_path)+256+1];
88 if ((dir = opendir(wmii_path)) == NULL)
91 while ((ent = readdir(dir)) != NULL) {
92 if (ent->d_type == DT_REG) {
93 (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, ent->d_name);
94 if (unlink(pathbuf) == -1)
103 * Creates the specified file in wmii's /rbar directory with
104 * correct modes and initializes colors if colormode is enabled
107 static void create_file(const char *name) {
108 char pathbuf[strlen(wmii_path)+256+1];
110 int flags = O_CREAT | O_WRONLY;
113 (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
115 /* Overwrite file's contents if it exists */
116 if (stat(pathbuf, &statbuf) >= 0)
119 if ((fd = open(pathbuf, flags, S_IRUSR | S_IWUSR)) < 0)
122 char *tmp = concat("#888888 ", wmii_normcolors);
123 if (write(fd, tmp, strlen(tmp)) != (ssize_t)strlen(tmp))
130 * Waits until wmii_path/rbar exists (= the filesystem gets mounted),
131 * cleans up all files and creates the needed files
134 static void setup(void) {
139 /* Wait until wmii_path/rbar exists */
140 for (; stat(wmii_path, &statbuf) < 0; sleep(interval));
144 create_file(concat(order[ORDER_WLAN],"wlan"));
146 create_file(concat(order[ORDER_ETH],"eth"));
148 create_file(concat(order[ORDER_BATTERY],"battery"));
149 create_file(concat(order[ORDER_LOAD],"load"));
151 create_file(concat(order[ORDER_TIME],"time"));
152 for (i = 0; i < num_run_watches; i += 2) {
153 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
154 create_file(pathbuf);
159 * Writes the given message in the corresponding file in wmii's /rbar directory
162 static void write_to_statusbar(const char *name, const char *message) {
163 char pathbuf[strlen(wmii_path)+256+1];
166 (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
167 if ((fd = open(pathbuf, O_RDWR)) == -1) {
168 /* Try to re-setup stuff and just continue */
172 if (write(fd, message, strlen(message)) != (ssize_t)strlen(message))
178 * Writes an errormessage to statusbar
181 static void write_error_to_statusbar(const char *message) {
183 create_file("error");
184 write_to_statusbar("error", message);
188 * Write errormessage to statusbar and exit
191 void die(const char *fmt, ...) {
192 if (wmii_path != NULL) {
196 (void)vsnprintf(buffer, sizeof(buffer), fmt, ap);
199 write_error_to_statusbar(buffer);
205 * Skip the given character for exactly 'amount' times, returns
206 * a pointer to the first non-'character' character in 'input'.
209 static char *skip_character(char *input, char character, int amount) {
211 size_t len = strlen(input);
214 for (walk = input; ((size_t)(walk - input) < len) && (blanks < amount); walk++)
215 if (*walk == character)
218 return (walk == input ? walk : walk-1);
222 * Get battery information from /sys. Note that it uses the design capacity to
223 * calculate the percentage, not the last full capacity, so you can see how
224 * worn off your battery is.
227 static char *get_battery_info() {
229 static char part[512];
232 int full_design = -1,
235 charging_status_t status = CS_DISCHARGING;
237 if ((fd = open(battery_path, O_RDONLY)) == -1)
238 return "No battery found";
240 memset(part, 0, sizeof(part));
241 (void)read(fd, buf, sizeof(buf));
242 for (walk = buf, last = buf; (walk-buf) < 1024; walk++)
244 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN") ||
245 BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN"))
246 full_design = atoi(walk+1);
247 else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
248 BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
249 remaining = atoi(walk+1);
250 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
251 present_rate = atoi(walk+1);
252 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
253 status = CS_CHARGING;
254 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
256 } else if (*walk == '\n')
260 if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
261 float remaining_time;
262 int seconds, hours, minutes;
263 if (status == CS_CHARGING)
264 remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
265 else if (status == CS_DISCHARGING)
266 remaining_time = ((float)remaining / (float)present_rate);
267 else remaining_time = 0;
269 seconds = (int)(remaining_time * 3600.0);
270 hours = seconds / 3600;
271 seconds -= (hours * 3600);
272 minutes = seconds / 60;
273 seconds -= (minutes * 60);
275 (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
276 (status == CS_CHARGING ? "CHR" :
277 (status == CS_DISCHARGING ? "BAT" : "FULL")),
278 (((float)remaining / (float)full_design) * 100),
279 hours, minutes, seconds);
285 * Just parses /proc/net/wireless looking for lines beginning with
286 * wlan_interface, extracting the quality of the link and adding the
287 * current IP address of wlan_interface.
290 static char *get_wireless_info() {
292 static char part[512];
295 memset(buf, 0, sizeof(buf));
296 memset(part, 0, sizeof(part));
298 if ((fd = open("/proc/net/wireless", O_RDONLY)) == -1)
299 die("Could not open /proc/net/wireless\n");
300 (void)read(fd, buf, sizeof(buf));
303 interfaces = skip_character(buf, '\n', 1) + 1;
304 while ((interfaces = skip_character(interfaces, '\n', 1)+1) < buf+strlen(buf)) {
305 while (isspace((int)*interfaces))
307 if (!BEGINS_WITH(interfaces, wlan_interface))
310 if (sscanf(interfaces, "%*[^:]: 0000 %d", &quality) != 1)
312 if ((quality == UCHAR_MAX) || (quality == 0)) {
314 (void)snprintf(part, sizeof(part), "%s%s",
315 concat("#FF0000 ", wmii_normcolors), " W: down");
316 else (void)snprintf(part, sizeof(part), "W: down");
317 } else (void)snprintf(part, sizeof(part), "W: (%03d%%) %s",
318 quality, get_ip_address(wlan_interface));
326 * Return the IP address for the given interface or "no IP" if the
327 * interface is up and running but hasn't got an IP address yet
330 static const char *get_ip_address(const char *interface) {
331 static char part[512];
333 struct sockaddr_in addr;
334 socklen_t len = sizeof(struct sockaddr_in);
335 memset(part, 0, sizeof(part));
337 (void)strcpy(ifr.ifr_name, interface);
338 ifr.ifr_addr.sa_family = AF_INET;
339 if (ioctl(general_socket, SIOCGIFADDR, &ifr) < 0)
342 memcpy(&addr, &ifr.ifr_addr, len);
343 (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, len);
344 if (strlen(part) == 0)
345 (void)snprintf(part, sizeof(part), "no IP");
351 * Combines ethernet IP addresses and speed (if requested) for displaying
354 static char *get_eth_info() {
355 static char part[512];
356 const char *ip_address = get_ip_address(eth_interface);
361 /* This code path requires root privileges */
363 struct ethtool_cmd ecmd;
365 ecmd.cmd = ETHTOOL_GSET;
366 (void)memset(&ifr, 0, sizeof(ifr));
367 ifr.ifr_data = (caddr_t)&ecmd;
368 (void)strcpy(ifr.ifr_name, eth_interface);
369 if (ioctl(general_socket, SIOCETHTOOL, &ifr) == 0)
370 ethspeed = (ecmd.speed == USHRT_MAX ? 0 : ecmd.speed);
371 else get_ethspeed = false;
375 if (ip_address == NULL)
376 (void)snprintf(part, sizeof(part), "E: down");
379 (void)snprintf(part, sizeof(part), "E: %s (%d Mbit/s)", ip_address, ethspeed);
380 else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
387 * Checks if the PID in path is still valid by checking if /proc/<pid> exists
390 static bool process_runs(const char *path) {
393 static glob_t globbuf;
396 memset(pidbuf, 0, sizeof(pidbuf));
398 if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
399 die("glob() failed\n");
400 fd = open((globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path), O_RDONLY);
404 (void)read(fd, pidbuf, sizeof(pidbuf));
407 (void)snprintf(procbuf, sizeof(procbuf), "/proc/%ld", strtol(pidbuf, NULL, 10));
408 return (stat(procbuf, &statbuf) >= 0);
411 int main(int argc, char *argv[]) {
417 char *configfile = PREFIX "/etc/wmiistatus.conf";
418 int o, option_index = 0;
419 struct option long_options[] = {
420 {"config", required_argument, 0, 'c'},
421 {"help", no_argument, 0, 'h'},
425 while ((o = getopt_long(argc, argv, "c:h", long_options, &option_index)) != -1)
428 else if ((char)o == 'h') {
429 printf("wmiistatus (c) 2008-2009 Michael Stapelberg\n"
430 "Syntax: %s [-c <configfile>]\n", argv[0]);
434 if (load_configuration(configfile) < 0)
439 if ((general_socket = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
440 die("Could not create socket\n");
443 for (i = 0; i < num_run_watches; i += 2) {
444 bool running = process_runs(run_watches[i+1]);
446 snprintf(part, sizeof(part), "%s %s: %s",
448 concat("#00FF00 ", wmii_normcolors) :
449 concat("#FF0000 ", wmii_normcolors)),
451 (running ? "yes" : "no"));
452 else snprintf(part, sizeof(part), "%s: %s", run_watches[i], (running ? "yes" : "no"));
453 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
454 write_to_statusbar(pathbuf, part);
458 write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info());
460 write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info());
462 write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info());
465 if ((load_avg = open("/proc/loadavg", O_RDONLY)) == -1)
466 die("Could not open /proc/loadavg\n");
467 (void)read(load_avg, part, sizeof(part));
468 (void)close(load_avg);
469 *skip_character(part, ' ', 3) = '\0';
470 write_to_statusbar(concat(order[ORDER_LOAD], "load"), part);
473 /* Get date & time */
474 time_t current_time = time(NULL);
475 struct tm *current_tm = localtime(¤t_time);
476 (void)strftime(part, sizeof(part), time_format, current_tm);
477 write_to_statusbar(concat(order[ORDER_TIME], "time"), part);