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>
56 #include <linux/ethtool.h>
57 #include <linux/sockios.h>
59 /* TODO: correctly check for *BSD */
60 #include <sys/param.h>
61 #include <sys/sysctl.h>
62 #include <sys/resource.h>
65 #define _IS_WMIISTATUS_C
66 #include "wmiistatus.h"
67 #undef _IS_WMIISTATUS_C
70 /* socket file descriptor for general purposes */
71 static int general_socket;
74 * This function just concats two strings in place, it should only be used
75 * for concatting order to the name of a file or concatting color codes.
76 * Otherwise, the buffer size would have to be increased.
79 static char *concat(const char *str1, const char *str2) {
80 static char concatbuf[32];
81 (void)snprintf(concatbuf, sizeof(concatbuf), "%s%s", str1, str2);
86 * Cleans wmii's /rbar directory by deleting all regular files
89 static void cleanup_rbar_dir() {
92 char pathbuf[strlen(wmii_path)+256+1];
94 if ((dir = opendir(wmii_path)) == NULL)
97 while ((ent = readdir(dir)) != NULL) {
98 if (ent->d_type == DT_REG) {
99 (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, ent->d_name);
100 if (unlink(pathbuf) == -1)
109 * Creates the specified file in wmii's /rbar directory with
110 * correct modes and initializes colors if colormode is enabled
113 static void create_file(const char *name) {
114 char pathbuf[strlen(wmii_path)+256+1];
116 int flags = O_CREAT | O_WRONLY;
119 (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
121 /* Overwrite file's contents if it exists */
122 if (stat(pathbuf, &statbuf) >= 0)
125 if ((fd = open(pathbuf, flags, S_IRUSR | S_IWUSR)) < 0)
128 char *tmp = concat("#888888 ", wmii_normcolors);
129 if (write(fd, tmp, strlen(tmp)) != (ssize_t)strlen(tmp))
136 * Waits until wmii_path/rbar exists (= the filesystem gets mounted),
137 * cleans up all files and creates the needed files
140 static void setup(void) {
145 /* Wait until wmii_path/rbar exists */
146 for (; stat(wmii_path, &statbuf) < 0; sleep(interval));
150 create_file(concat(order[ORDER_WLAN],"wlan"));
152 create_file(concat(order[ORDER_ETH],"eth"));
154 create_file(concat(order[ORDER_BATTERY],"battery"));
155 create_file(concat(order[ORDER_LOAD],"load"));
157 create_file(concat(order[ORDER_TIME],"time"));
158 for (i = 0; i < num_run_watches; i += 2) {
159 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
160 create_file(pathbuf);
165 * Writes the given message in the corresponding file in wmii's /rbar directory
168 static void write_to_statusbar(const char *name, const char *message) {
169 char pathbuf[strlen(wmii_path)+256+1];
172 (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
173 if ((fd = open(pathbuf, O_RDWR)) == -1) {
174 /* Try to re-setup stuff and just continue */
178 if (write(fd, message, strlen(message)) != (ssize_t)strlen(message))
184 * Writes an errormessage to statusbar
187 static void write_error_to_statusbar(const char *message) {
189 create_file("error");
190 write_to_statusbar("error", message);
194 * Write errormessage to statusbar and exit
197 void die(const char *fmt, ...) {
198 if (wmii_path != NULL) {
202 (void)vsnprintf(buffer, sizeof(buffer), fmt, ap);
205 write_error_to_statusbar(buffer);
211 * Skip the given character for exactly 'amount' times, returns
212 * a pointer to the first non-'character' character in 'input'.
215 static char *skip_character(char *input, char character, int amount) {
217 size_t len = strlen(input);
220 for (walk = input; ((size_t)(walk - input) < len) && (blanks < amount); walk++)
221 if (*walk == character)
224 return (walk == input ? walk : walk-1);
228 * Get battery information from /sys. Note that it uses the design capacity to
229 * calculate the percentage, not the last full capacity, so you can see how
230 * worn off your battery is.
233 static char *get_battery_info() {
235 static char part[512];
238 int full_design = -1,
241 charging_status_t status = CS_DISCHARGING;
243 if ((fd = open(battery_path, O_RDONLY)) == -1)
244 return "No battery found";
246 memset(part, 0, sizeof(part));
247 (void)read(fd, buf, sizeof(buf));
248 for (walk = buf, last = buf; (walk-buf) < 1024; walk++)
250 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN") ||
251 BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN"))
252 full_design = atoi(walk+1);
253 else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
254 BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
255 remaining = atoi(walk+1);
256 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
257 present_rate = atoi(walk+1);
258 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
259 status = CS_CHARGING;
260 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
262 } else if (*walk == '\n')
266 if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
267 float remaining_time;
268 int seconds, hours, minutes;
269 if (status == CS_CHARGING)
270 remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
271 else if (status == CS_DISCHARGING)
272 remaining_time = ((float)remaining / (float)present_rate);
273 else remaining_time = 0;
275 seconds = (int)(remaining_time * 3600.0);
276 hours = seconds / 3600;
277 seconds -= (hours * 3600);
278 minutes = seconds / 60;
279 seconds -= (minutes * 60);
281 (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
282 (status == CS_CHARGING ? "CHR" :
283 (status == CS_DISCHARGING ? "BAT" : "FULL")),
284 (((float)remaining / (float)full_design) * 100),
285 hours, minutes, seconds);
291 * Just parses /proc/net/wireless looking for lines beginning with
292 * wlan_interface, extracting the quality of the link and adding the
293 * current IP address of wlan_interface.
296 static char *get_wireless_info() {
298 static char part[512];
301 memset(buf, 0, sizeof(buf));
302 memset(part, 0, sizeof(part));
304 if ((fd = open("/proc/net/wireless", O_RDONLY)) == -1)
305 die("Could not open /proc/net/wireless\n");
306 (void)read(fd, buf, sizeof(buf));
309 interfaces = skip_character(buf, '\n', 1) + 1;
310 while ((interfaces = skip_character(interfaces, '\n', 1)+1) < buf+strlen(buf)) {
311 while (isspace((int)*interfaces))
313 if (!BEGINS_WITH(interfaces, wlan_interface))
316 if (sscanf(interfaces, "%*[^:]: 0000 %d", &quality) != 1)
318 if ((quality == UCHAR_MAX) || (quality == 0)) {
320 (void)snprintf(part, sizeof(part), "%s%s",
321 concat("#FF0000 ", wmii_normcolors), " W: down");
322 else (void)snprintf(part, sizeof(part), "W: down");
323 } else (void)snprintf(part, sizeof(part), "W: (%03d%%) %s",
324 quality, get_ip_address(wlan_interface));
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];
339 struct sockaddr_in addr;
340 socklen_t len = sizeof(struct sockaddr_in);
341 memset(part, 0, sizeof(part));
343 (void)strcpy(ifr.ifr_name, interface);
344 ifr.ifr_addr.sa_family = AF_INET;
345 if (ioctl(general_socket, SIOCGIFADDR, &ifr) < 0)
348 memcpy(&addr, &ifr.ifr_addr, len);
349 (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, len);
350 if (strlen(part) == 0)
351 (void)snprintf(part, sizeof(part), "no IP");
357 * Combines ethernet IP addresses and speed (if requested) for displaying
360 static char *get_eth_info() {
361 static char part[512];
362 const char *ip_address = get_ip_address(eth_interface);
367 /* This code path requires root privileges */
369 struct ethtool_cmd ecmd;
371 ecmd.cmd = ETHTOOL_GSET;
372 (void)memset(&ifr, 0, sizeof(ifr));
373 ifr.ifr_data = (caddr_t)&ecmd;
374 (void)strcpy(ifr.ifr_name, eth_interface);
375 if (ioctl(general_socket, SIOCETHTOOL, &ifr) == 0)
376 ethspeed = (ecmd.speed == USHRT_MAX ? 0 : ecmd.speed);
377 else get_ethspeed = false;
381 if (ip_address == NULL)
382 (void)snprintf(part, sizeof(part), "E: down");
385 (void)snprintf(part, sizeof(part), "E: %s (%d Mbit/s)", ip_address, ethspeed);
386 else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
393 * Checks if the PID in path is still valid by checking if /proc/<pid> exists
396 static bool process_runs(const char *path) {
399 static glob_t globbuf;
402 memset(pidbuf, 0, sizeof(pidbuf));
404 if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
405 die("glob() failed\n");
406 fd = open((globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path), O_RDONLY);
410 (void)read(fd, pidbuf, sizeof(pidbuf));
414 (void)snprintf(procbuf, sizeof(procbuf), "/proc/%ld", strtol(pidbuf, NULL, 10));
415 return (stat(procbuf, &statbuf) >= 0);
417 /* TODO: correctly check for NetBSD. Evaluate if this runs on OpenBSD/FreeBSD */
418 struct kinfo_proc info;
419 size_t length = sizeof(struct kinfo_proc);
420 int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, strtol(pidbuf, NULL, 10) };
421 if (sysctl(mib, 4, &info, &length, NULL, 0) < 0)
423 return (length != 0);
427 int main(int argc, char *argv[]) {
433 char *configfile = PREFIX "/etc/wmiistatus.conf";
434 int o, option_index = 0;
435 struct option long_options[] = {
436 {"config", required_argument, 0, 'c'},
437 {"help", no_argument, 0, 'h'},
441 while ((o = getopt_long(argc, argv, "c:h", long_options, &option_index)) != -1)
444 else if ((char)o == 'h') {
445 printf("wmiistatus (c) 2008-2009 Michael Stapelberg\n"
446 "Syntax: %s [-c <configfile>]\n", argv[0]);
450 if (load_configuration(configfile) < 0)
455 if ((general_socket = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
456 die("Could not create socket\n");
459 for (i = 0; i < num_run_watches; i += 2) {
460 bool running = process_runs(run_watches[i+1]);
462 snprintf(part, sizeof(part), "%s %s: %s",
464 concat("#00FF00 ", wmii_normcolors) :
465 concat("#FF0000 ", wmii_normcolors)),
467 (running ? "yes" : "no"));
468 else snprintf(part, sizeof(part), "%s: %s", run_watches[i], (running ? "yes" : "no"));
469 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
470 write_to_statusbar(pathbuf, part);
474 write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info());
476 write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info());
478 write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info());
482 if ((load_avg = open("/proc/loadavg", O_RDONLY)) == -1)
483 die("Could not open /proc/loadavg\n");
484 (void)read(load_avg, part, sizeof(part));
485 (void)close(load_avg);
486 *skip_character(part, ' ', 3) = '\0';
488 /* TODO: correctly check for NetBSD, check if it works the same on *BSD */
490 size_t length = sizeof(struct loadavg);
491 int mib[2] = { CTL_VM, VM_LOADAVG };
492 if (sysctl(mib, 2, &load, &length, NULL, 0) < 0)
493 die("Could not sysctl({ CTL_VM, VM_LOADAVG })\n");
494 double scale = load.fscale;
495 (void)snprintf(part, sizeof(part), "%.02f %.02f %.02f",
496 (double)load.ldavg[0] / scale,
497 (double)load.ldavg[1] / scale,
498 (double)load.ldavg[2] / scale);
500 write_to_statusbar(concat(order[ORDER_LOAD], "load"), part);
503 /* Get date & time */
504 time_t current_time = time(NULL);
505 struct tm *current_tm = localtime(¤t_time);
506 (void)strftime(part, sizeof(part), time_format, current_tm);
507 write_to_statusbar(concat(order[ORDER_TIME], "time"), part);