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 #include <linux/ethtool.h>
  54 #include <linux/sockios.h>
  55
  56
  57 #define _IS_WMIISTATUS_C
  58 #include "wmiistatus.h"
  59 #undef _IS_WMIISTATUS_C
  60 #include "config.h"
  61
  62 /*
  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.
  66  *
  67  */
  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);
  71         return concatbuf;
  72 }
  73
  74 /*
  75  * Cleans wmii's /rbar directory by deleting all regular files
  76  *
  77  */
  78 static void cleanup_rbar_dir() {
  79         struct dirent *ent;
  80         DIR *dir;
  81         char pathbuf[strlen(wmii_path)+256+1];
  82
  83         if ((dir = opendir(wmii_path)) == NULL)
  84                 exit(EXIT_FAILURE);
  85
  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)
  90                                 exit(EXIT_FAILURE);
  91                 }
  92         }
  93
  94         (void)closedir(dir);
  95 }
  96
  97 /*
  98  * Creates the specified file in wmii's /rbar directory with
  99  * correct modes and initializes colors if colormode is enabled
 100  * '
 101  */
 102 static void create_file(const char *name) {
 103         char pathbuf[strlen(wmii_path)+256+1];
 104         int fd;
 105
 106         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
 107         if ((fd = open(pathbuf, O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0)
 108                 exit(EXIT_FAILURE);
 109         if (use_colors) {
 110                 char *tmp = concat("#888888 ", wmii_normcolors);
 111                 if (write(fd, tmp, strlen(tmp)) != (ssize_t)strlen(tmp))
 112                         exit(EXIT_FAILURE);
 113         }
 114         (void)close(fd);
 115 }
 116
 117 /*
 118  * Writes the given message in the corresponding file in wmii's /rbar directory
 119  *
 120  */
 121 static void write_to_statusbar(const char *name, const char *message) {
 122         char pathbuf[strlen(wmii_path)+256+1];
 123         int fd;
 124
 125         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
 126         if ((fd = open(pathbuf, O_RDWR)) == -1)
 127                 exit(EXIT_FAILURE);
 128         if (write(fd, message, strlen(message)) != (ssize_t)strlen(message))
 129                 exit(EXIT_FAILURE);
 130         (void)close(fd);
 131 }
 132
 133 /*
 134  * Writes an errormessage to statusbar
 135  *
 136  */
 137 static void write_error_to_statusbar(const char *message) {
 138         cleanup_rbar_dir();
 139         create_file("error");
 140         write_to_statusbar("error", message);
 141 }
 142
 143 /*
 144  * Write errormessage to statusbar and exit
 145  *
 146  */
 147 void die(const char *fmt, ...) {
 148         char buffer[512];
 149         va_list ap;
 150         va_start(ap, fmt);
 151         (void)vsnprintf(buffer, sizeof(buffer), fmt, ap);
 152         va_end(ap);
 153
 154         write_error_to_statusbar(buffer);
 155         exit(EXIT_FAILURE);
 156 }
 157
 158 static char *skip_character(char *input, char character, int amount) {
 159         char *walk;
 160         size_t len = strlen(input);
 161         int blanks = 0;
 162
 163         for (walk = input; ((size_t)(walk - input) < len) && (blanks < amount); walk++)
 164                 if (*walk == character)
 165                         blanks++;
 166
 167         return (walk == input ? walk : walk-1);
 168 }
 169
 170 /*
 171  * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
 172  * not the full capacity.
 173  *
 174  */
 175 static char *get_battery_info() {
 176         char buf[1024];
 177         static char part[512];
 178         char *walk, *last;
 179         int fd;
 180         int full_design = -1,
 181             remaining = -1,
 182             present_rate = -1;
 183         charging_status_t status = CS_DISCHARGING;
 184
 185         if ((fd = open(battery_path, O_RDONLY)) == -1)
 186                 die("Could not open %s", battery_path);
 187
 188         memset(part, 0, sizeof(part));
 189         (void)read(fd, buf, sizeof(buf));
 190         for (walk = buf, last = buf; (walk-buf) < 1024; walk++)
 191                 if (*walk == '=') {
 192                         if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN") ||
 193                             BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN"))
 194                                 full_design = atoi(walk+1);
 195                         else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
 196                                  BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
 197                                 remaining = atoi(walk+1);
 198                         else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
 199                                 present_rate = atoi(walk+1);
 200                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
 201                                 status = CS_CHARGING;
 202                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
 203                                 status = CS_FULL;
 204                 } else if (*walk == '\n')
 205                         last = walk+1;
 206         (void)close(fd);
 207
 208         if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
 209                 float remaining_time, perc;
 210                 int seconds, hours, minutes;
 211                 if (status == CS_CHARGING)
 212                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 213                 else if (status == CS_DISCHARGING)
 214                         remaining_time = ((float)remaining / (float)present_rate);
 215                 else {
 216                         (void)snprintf(part, sizeof(part), "FULL");
 217                         return part;
 218                 }
 219                 perc = ((float)remaining / (float)full_design);
 220
 221                 seconds = (int)(remaining_time * 3600.0);
 222                 hours = seconds / 3600;
 223                 seconds -= (hours * 3600);
 224                 minutes = seconds / 60;
 225                 seconds -= (minutes * 60);
 226
 227                 (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
 228                         (status == CS_CHARGING? "CHR" : "BAT"),
 229                         (perc * 100), hours, minutes, seconds);
 230         }
 231         return part;
 232 }
 233
 234 /*
 235  * Just parses /proc/net/wireless
 236  *
 237  */
 238 static char *get_wireless_info() {
 239         char buf[1024];
 240         static char part[512];
 241         char *interfaces;
 242         int fd;
 243         memset(buf, 0, sizeof(buf));
 244         memset(part, 0, sizeof(part));
 245
 246         if ((fd = open("/proc/net/wireless", O_RDONLY)) == -1)
 247                 die("Could not open /proc/net/wireless");
 248         (void)read(fd, buf, sizeof(buf));
 249         (void)close(fd);
 250
 251         interfaces = skip_character(buf, '\n', 2) + 1;
 252         while (interfaces < buf+strlen(buf)) {
 253                 while (isspace((int)*interfaces))
 254                         interfaces++;
 255                 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
 256                         int quality;
 257                         /* Skip status field (0000) */
 258                         interfaces += strlen(wlan_interface) + 2;
 259                         interfaces = skip_character(interfaces, ' ', 1);
 260                         while (isspace((int)*interfaces))
 261                                 interfaces++;
 262                         quality = atoi(interfaces);
 263                         /* For some reason, I get 255 sometimes */
 264                         if ((quality == 255) || (quality == 0)) {
 265                         if (use_colors)
 266                                 (void)snprintf(part, sizeof(part), "%s%s", concat("#FF0000 ", wmii_normcolors), " W: down");
 267                         else (void)snprintf(part, sizeof(part), "W: down");
 268
 269                         } else {
 270                                 const char *ip_address;
 271                                 (void)snprintf(part, sizeof(part), "W: (%02d%%) ", quality);
 272                                 ip_address = get_ip_address(wlan_interface);
 273                                 strcpy(part+strlen(part), ip_address);
 274                         }
 275
 276                         return part;
 277                 }
 278                 interfaces = skip_character(interfaces, '\n', 1) + 1;
 279         }
 280
 281         return part;
 282 }
 283
 284 static const char *get_ip_address(const char *interface) {
 285         static char part[512];
 286         struct ifreq ifr;
 287         int fd;
 288         memset(part, 0, sizeof(part));
 289
 290         fd = socket(AF_INET, SOCK_DGRAM, 0);
 291
 292         strcpy(ifr.ifr_name, interface);
 293         if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0)
 294                 die("Could not get interface flags (SIOCGIFFLAGS)");
 295
 296         if (!(ifr.ifr_flags & IFF_UP) ||
 297             !(ifr.ifr_flags & IFF_RUNNING)) {
 298                 close(fd);
 299                 return NULL;
 300         }
 301
 302         strcpy(ifr.ifr_name, interface);
 303         ifr.ifr_addr.sa_family = AF_INET;
 304         if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
 305                 struct sockaddr_in addr;
 306                 memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
 307                 (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, (socklen_t)sizeof(struct sockaddr_in));
 308                 if (strlen(part) == 0)
 309                         snprintf(part, sizeof(part), "no IP");
 310         }
 311
 312         (void)close(fd);
 313         return part;
 314 }
 315
 316 static char *get_eth_info() {
 317         static char part[512];
 318         const char *ip_address = get_ip_address(eth_interface);
 319         int ethspeed = 0;
 320
 321         if (get_ethspeed) {
 322                 struct ifreq ifr;
 323                 struct ethtool_cmd ecmd;
 324                 int fd, err;
 325
 326                 if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
 327                         write_error_to_statusbar("Could not open socket");
 328
 329                 ecmd.cmd = ETHTOOL_GSET;
 330                 (void)memset(&ifr, 0, sizeof(ifr));
 331                 ifr.ifr_data = (caddr_t)&ecmd;
 332                 (void)strcpy(ifr.ifr_name, eth_interface);
 333                 if ((err = ioctl(fd, SIOCETHTOOL, &ifr)) == 0)
 334                         ethspeed = ecmd.speed;
 335                 else write_error_to_statusbar("Could not get interface speed. Insufficient privileges?");
 336
 337                 (void)close(fd);
 338         }
 339
 340         if (ip_address == NULL)
 341                 (void)snprintf(part, sizeof(part), "E: down");
 342         else {
 343                 if (get_ethspeed)
 344                         (void)snprintf(part, sizeof(part), "E: %s (%d Mbit/s)", ip_address, ethspeed);
 345                 else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
 346         }
 347
 348         return part;
 349 }
 350
 351 /*
 352  * Checks if the PID in path is still valid by checking if /proc/<pid> exists
 353  *
 354  */
 355 static bool process_runs(const char *path) {
 356         char pidbuf[512],
 357              procbuf[512],
 358              *walk;
 359         ssize_t n;
 360         static glob_t globbuf;
 361         struct stat statbuf;
 362         const char *real_path;
 363         int fd;
 364
 365         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
 366                 die("glob() failed");
 367         real_path = (globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
 368         fd = open(real_path, O_RDONLY);
 369         globfree(&globbuf);
 370         if (fd < 0)
 371                 return false;
 372         if ((n = read(fd, pidbuf, sizeof(pidbuf))) > 0)
 373                 pidbuf[n] = '\0';
 374         (void)close(fd);
 375         for (walk = pidbuf; *walk != '\0'; walk++)
 376                 if (!isdigit((int)(*walk))) {
 377                         *walk = '\0';
 378                         break;
 379                 }
 380         (void)snprintf(procbuf, sizeof(procbuf), "/proc/%s", pidbuf);
 381         return (stat(procbuf, &statbuf) >= 0);
 382 }
 383
 384 int main(int argc, char *argv[]) {
 385         char part[512],
 386              pathbuf[512],
 387              *end;
 388         unsigned int i;
 389         int load_avg;
 390
 391         char *configfile = PREFIX "/etc/wmiistatus.conf";
 392         int o, option_index = 0;
 393         struct option long_options[] = {
 394                 {"config", required_argument, 0, 'c'},
 395                 {0, 0, 0, 0}
 396         };
 397
 398         while ((o = getopt_long(argc, argv, "c:", long_options, &option_index)) != -1)
 399                 if ((char)o == 'c')
 400                         configfile = optarg;
 401
 402         load_configuration(configfile);
 403         cleanup_rbar_dir();
 404         if (wlan_interface)
 405                 create_file(concat(order[ORDER_WLAN],"wlan"));
 406         if (eth_interface)
 407                 create_file(concat(order[ORDER_ETH],"eth"));
 408         if (battery_path)
 409                 create_file(concat(order[ORDER_BATTERY],"battery"));
 410         create_file(concat(order[ORDER_LOAD],"load"));
 411         if (time_format)
 412                 create_file(concat(order[ORDER_TIME],"time"));
 413         for (i = 0; i < num_run_watches; i += 2) {
 414                 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 415                 create_file(pathbuf);
 416         }
 417
 418         while (1) {
 419                 for (i = 0; i < num_run_watches; i += 2) {
 420                         bool running = process_runs(run_watches[i+1]);
 421                         if (use_colors)
 422                                 snprintf(part, sizeof(part), "%s %s: %s",
 423                                         (running ?
 424                                                 concat("#00FF00 ", wmii_normcolors) :
 425                                                 concat("#FF0000 ", wmii_normcolors)),
 426                                         run_watches[i],
 427                                         (running ? "yes" : "no"));
 428                         else snprintf(part, sizeof(part), "%s: %s", run_watches[i], (running ? "yes" : "no"));
 429                         snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 430                         write_to_statusbar(pathbuf, part);
 431                 }
 432
 433                 if (wlan_interface)
 434                         write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info());
 435                 if (eth_interface)
 436                         write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info());
 437                 if (battery_path)
 438                         write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info());
 439
 440                 /* Get load */
 441                 if ((load_avg = open("/proc/loadavg", O_RDONLY)) == -1)
 442                         die("Could not open /proc/loadavg");
 443                 (void)read(load_avg, part, sizeof(part));
 444                 (void)close(load_avg);
 445                 end = skip_character(part, ' ', 3);
 446                 *end = '\0';
 447                 write_to_statusbar(concat(order[ORDER_LOAD], "load"), part);
 448
 449                 if (time_format) {
 450                         /* Get date & time */
 451                         time_t current_time = time(NULL);
 452                         struct tm *current_tm = localtime(&current_time);
 453                         (void)strftime(part, sizeof(part), time_format, current_tm);
 454                         write_to_statusbar(concat(order[ORDER_TIME], "time"), part);
 455                 }
 456
 457                 sleep(interval);
 458         }
 459 }