git.sur5r.net Git - i3/i3status/blob - wmiistatus.c

   1 /*
   2  * Generates a status line for use with wmii or other minimal window managers
   3  *
   4  *
   5  * Copyright (c) 2008 Michael Stapelberg and contributors
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without modification,
   9  * are permitted provided that the following conditions are met:
  10  *
  11  * * Redistributions of source code must retain the above copyright notice, this
  12  *   list of conditions and the following disclaimer.
  13  *
  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.
  17  *
  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.
  21  *
  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
  31  * DAMAGE.
  32  *
  33  */
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <fcntl.h>
  37 #include <string.h>
  38 #include <stdio.h>
  39 #include <time.h>
  40 #include <stdbool.h>
  41 #include <stdarg.h>
  42 #include <unistd.h>
  43 #include <stdlib.h>
  44 #include <ctype.h>
  45 #include <net/if.h>
  46 #include <sys/ioctl.h>
  47 #include <sys/socket.h>
  48 #include <netinet/in.h>
  49 #include <arpa/inet.h>
  50 #include <glob.h>
  51 #include <dirent.h>
  52 #include <getopt.h>
  53
  54 #define _IS_WMIISTATUS_C
  55 #include "wmiistatus.h"
  56 #undef _IS_WMIISTATUS_C
  57 #include "config.h"
  58
  59 /*
  60  * This function just concats two strings in place, it should only be used
  61  * for concatting order to the name of a file or concatting color codes.
  62  * Otherwise, the buffer size would have to be increased.
  63  *
  64  */
  65 static char *concat(const char *str1, const char *str2) {
  66         static char concatbuf[32];
  67         snprintf(concatbuf, sizeof(concatbuf), "%s%s", str1, str2);
  68         return concatbuf;
  69 }
  70
  71 static void cleanup_rbar_dir() {
  72         struct dirent *ent;
  73         DIR *dir;
  74         char pathbuf[strlen(wmii_path)+256+1];
  75
  76         if ((dir = opendir(wmii_path)) == NULL)
  77                 exit(-3);
  78
  79         while ((ent = readdir(dir)) != NULL) {
  80                 if (ent->d_type == DT_REG) {
  81                         sprintf(pathbuf, "%s%s", wmii_path, ent->d_name);
  82                         unlink(pathbuf);
  83                 }
  84         }
  85
  86         closedir(dir);
  87 }
  88
  89 static void create_file(const char *name) {
  90         char pathbuf[strlen(wmii_path)+256+1];
  91
  92         sprintf(pathbuf, "%s%s", wmii_path, name);
  93         int fd = creat(pathbuf, S_IRUSR | S_IWUSR);
  94         if (fd < 0)
  95                 exit(-4);
  96         if (use_colors) {
  97                 char *tmp = concat("#888888 ", wmii_normcolors);
  98                 write(fd, tmp, strlen(tmp));
  99         }
 100         close(fd);
 101 }
 102
 103 static void write_to_statusbar(const char *name, const char *message) {
 104         char pathbuf[strlen(wmii_path)+256+1];
 105
 106         sprintf(pathbuf, "%s%s", wmii_path, name);
 107         int fd = open(pathbuf, O_RDWR);
 108         if (fd == -1)
 109                 exit(-2);
 110         write(fd, message, strlen(message));
 111         close(fd);
 112 }
 113
 114 static void write_error_to_statusbar(const char *message) {
 115         cleanup_rbar_dir();
 116         create_file("error");
 117         write_to_statusbar("error", message);
 118 }
 119
 120 /*
 121  * Write errormessage to statusbar and exit
 122  *
 123  */
 124 void die(const char *fmt, ...) {
 125         char buffer[512];
 126         va_list ap;
 127         va_start(ap, fmt);
 128         vsprintf(buffer, fmt, ap);
 129         va_end(ap);
 130
 131         write_error_to_statusbar(buffer);
 132         exit(-1);
 133 }
 134
 135 static char *skip_character(char *input, char character, int amount) {
 136         char *walk;
 137         int len = strlen(input),
 138             blanks = 0;
 139
 140         for (walk = input; ((walk - input) < len) && (blanks < amount); walk++)
 141                 if (*walk == character)
 142                         blanks++;
 143
 144         return (walk == input ? walk : walk-1);
 145 }
 146
 147 /*
 148  * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
 149  * not the full capacity.
 150  *
 151  */
 152 static char *get_battery_info() {
 153         char buf[1024];
 154         static char part[512];
 155         char *walk, *last = buf;
 156         int fd = open(battery_path, O_RDONLY);
 157         if (fd == -1)
 158                 die("Could not open %s", battery_path);
 159         int full_design = -1,
 160             remaining = -1,
 161             present_rate = -1;
 162         charging_status_t status = CS_DISCHARGING;
 163         memset(part, '\0', sizeof(part));
 164         read(fd, buf, sizeof(buf));
 165         for (walk = buf; (walk-buf) < 1024; walk++)
 166                 if (*walk == '=') {
 167                         if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
 168                                 full_design = atoi(walk+1);
 169                         else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW"))
 170                                 remaining = atoi(walk+1);
 171                         else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
 172                                 present_rate = atoi(walk+1);
 173                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
 174                                 status = CS_CHARGING;
 175                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
 176                                 status = CS_FULL;
 177                 } else if (*walk == '\n')
 178                         last = walk+1;
 179         close(fd);
 180
 181         if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
 182                 float remaining_time, perc;
 183                 if (status == CS_CHARGING)
 184                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 185                 else if (status == CS_DISCHARGING)
 186                         remaining_time = ((float)remaining / (float)present_rate);
 187                 else {
 188                         snprintf(part, sizeof(part), "FULL");
 189                         return part;
 190                 }
 191                 perc = ((float)remaining / (float)full_design);
 192
 193                 int seconds = (int)(remaining_time * 3600.0);
 194                 int hours = seconds / 3600;
 195                 seconds -= (hours * 3600);
 196                 int minutes = seconds / 60;
 197                 seconds -= (minutes * 60);
 198
 199                 sprintf(part, "%s %.02f%% %02d:%02d:%02d", (status == CS_CHARGING? "CHR" : "BAT"),
 200                         (perc * 100), hours, minutes, seconds);
 201         }
 202         return part;
 203 }
 204
 205 /*
 206  * Just parses /proc/net/wireless
 207  *
 208  */
 209 static char *get_wireless_info() {
 210         char buf[1024];
 211         static char part[512];
 212         char *interfaces;
 213         memset(buf, '\0', sizeof(buf));
 214         memset(part, '\0', sizeof(part));
 215
 216         int fd = open("/proc/net/wireless", O_RDONLY);
 217         if (fd == -1)
 218                 die("Could not open /proc/net/wireless");
 219         read(fd, buf, sizeof(buf));
 220         close(fd);
 221
 222         interfaces = skip_character(buf, '\n', 2) + 1;
 223         while (interfaces < buf+strlen(buf)) {
 224                 while (isspace((int)*interfaces))
 225                         interfaces++;
 226                 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
 227                         /* Skip status field (0000) */
 228                         interfaces += strlen(wlan_interface) + 2;
 229                         interfaces = skip_character(interfaces, ' ', 1);
 230                         while (isspace((int)*interfaces))
 231                                 interfaces++;
 232                         int quality = atoi(interfaces);
 233                         /* For some reason, I get 255 sometimes */
 234                         if ((quality == 255) || (quality == 0)) {
 235                         if (use_colors)
 236                                 snprintf(part, sizeof(part), "%s%s", concat("#FF0000 ", wmii_normcolors), " W: down");
 237                         else snprintf(part, sizeof(part), "W: down");
 238
 239                         } else {
 240                                 snprintf(part, sizeof(part), "W: (%02d%%) ", quality);
 241                                 char *ip_address = get_ip_address(wlan_interface);
 242                                 strcpy(part+strlen(part), ip_address);
 243                         }
 244
 245                         return part;
 246                 }
 247                 interfaces = skip_character(interfaces, '\n', 1) + 1;
 248         }
 249
 250         return part;
 251 }
 252
 253 static char *get_ip_address(const char *interface) {
 254         static char part[512];
 255         struct ifreq ifr;
 256         memset(part, '\0', sizeof(part));
 257
 258         int fd = socket(AF_INET, SOCK_DGRAM, 0);
 259
 260         strcpy(ifr.ifr_name, interface);
 261         if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0)
 262                 die("Could not get interface flags (SIOCGIFFLAGS)");
 263
 264         if (!(ifr.ifr_flags & IFF_UP) ||
 265             !(ifr.ifr_flags & IFF_RUNNING)) {
 266                 close(fd);
 267                 return NULL;
 268         }
 269
 270         strcpy(ifr.ifr_name, interface);
 271         ifr.ifr_addr.sa_family = AF_INET;
 272         if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
 273                 struct sockaddr_in addr;
 274                 memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
 275                 inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, sizeof(struct sockaddr_in));
 276                 if (strlen(part) == 0)
 277                         sprintf(part, "no IP");
 278         }
 279
 280         close(fd);
 281         return part;
 282 }
 283
 284 static char *get_eth_info() {
 285         static char part[512];
 286         char *ip_address = get_ip_address(eth_interface);
 287
 288         if (ip_address == NULL)
 289                 snprintf(part, sizeof(part), "E: down");
 290         else snprintf(part, sizeof(part), "E: %s", ip_address);
 291
 292         return part;
 293 }
 294
 295 /*
 296  * Checks if the PID in path is still valid by checking if /proc/<pid> exists
 297  *
 298  */
 299 static bool process_runs(const char *path) {
 300         char pidbuf[512],
 301              procbuf[512],
 302              *walk;
 303         int n;
 304         static glob_t globbuf;
 305         struct stat statbuf;
 306
 307         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
 308                 die("glob() failed");
 309         const char *real_path = (globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
 310         int fd = open(real_path, O_RDONLY);
 311         globfree(&globbuf);
 312         if (fd < 0)
 313                 return false;
 314         n = read(fd, pidbuf, sizeof(pidbuf));
 315         if (n > 0)
 316                 pidbuf[n] = '\0';
 317         close(fd);
 318         for (walk = pidbuf; *walk != '\0'; walk++)
 319                 if (!isdigit((int)(*walk))) {
 320                         *walk = '\0';
 321                         break;
 322                 }
 323         sprintf(procbuf, "/proc/%s", pidbuf);
 324         return (stat(procbuf, &statbuf) >= 0);
 325 }
 326
 327 int main(int argc, char *argv[]) {
 328         char part[512],
 329              pathbuf[512],
 330              *end;
 331         unsigned int i;
 332
 333         char *configfile = PREFIX "/etc/wmiistatus.conf";
 334         int o, option_index = 0;
 335         struct option long_options[] = {
 336                 {"config", required_argument, 0, 'c'},
 337                 {0, 0, 0, 0}
 338         };
 339
 340         while ((o = getopt_long(argc, argv, "c:", long_options, &option_index)) != -1)
 341                 if ((char)o == 'c')
 342                         configfile = optarg;
 343
 344         load_configuration(configfile);
 345         cleanup_rbar_dir();
 346         if (wlan_interface)
 347                 create_file(concat(order[ORDER_WLAN],"wlan"));
 348         if (eth_interface)
 349                 create_file(concat(order[ORDER_ETH],"eth"));
 350         if (battery_path)
 351                 create_file(concat(order[ORDER_BATTERY],"battery"));
 352         create_file(concat(order[ORDER_LOAD],"load"));
 353         if (time_format)
 354                 create_file(concat(order[ORDER_TIME],"time"));
 355         for (i = 0; i < num_run_watches; i += 2) {
 356                 sprintf(pathbuf, "%s%s", order[ORDER_RUN], run_watches[i]);
 357                 create_file(pathbuf);
 358         }
 359
 360         while (1) {
 361                 for (i = 0; i < num_run_watches; i += 2) {
 362                         bool running = process_runs(run_watches[i+1]);
 363                         if (use_colors)
 364                                 sprintf(part, "%s %s: %s", (running ? concat("#00FF00 ", wmii_normcolors) : concat("#FF0000 ", wmii_normcolors)), run_watches[i], (running ? "yes" : "no"));
 365                         else sprintf(part, "%s: %s", run_watches[i], (running ? "yes" : "no"));
 366                         sprintf(pathbuf, "%s%s", order[ORDER_RUN], run_watches[i]);
 367                         write_to_statusbar(pathbuf, part);
 368                 }
 369
 370                 if (wlan_interface)
 371                         write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info());
 372                 if (eth_interface)
 373                         write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info());
 374                 if (battery_path)
 375                         write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info());
 376
 377                 /* Get load */
 378                 int load_avg = open("/proc/loadavg", O_RDONLY);
 379                 if (load_avg == -1)
 380                         die("Could not open /proc/loadavg");
 381                 read(load_avg, part, sizeof(part));
 382                 close(load_avg);
 383                 end = skip_character(part, ' ', 3);
 384                 *end = '\0';
 385                 write_to_statusbar(concat(order[ORDER_LOAD], "load"), part);
 386
 387                 if (time_format) {
 388                         /* Get date & time */
 389                         time_t current_time = time(NULL);
 390                         struct tm *current_tm = localtime(&current_time);
 391                         strftime(part, sizeof(part), time_format, current_tm);
 392                         write_to_statusbar(concat(order[ORDER_TIME], "time"), part);
 393                 }
 394
 395                 sleep(interval);
 396         }
 397 }