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         int flags = O_CREAT | O_WRONLY;
 106         struct stat statbuf;
 107
 108         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
 109
 110         /* Overwrite file's contents if it exists */
 111         if (stat(pathbuf, &statbuf) >= 0)
 112                 flags |= O_TRUNC;
 113
 114         if ((fd = open(pathbuf, flags, S_IRUSR | S_IWUSR)) < 0)
 115                 exit(EXIT_FAILURE);
 116         if (use_colors) {
 117                 char *tmp = concat("#888888 ", wmii_normcolors);
 118                 if (write(fd, tmp, strlen(tmp)) != (ssize_t)strlen(tmp))
 119                         exit(EXIT_FAILURE);
 120         }
 121         (void)close(fd);
 122 }
 123
 124 static void setup(void) {
 125         unsigned int i;
 126         struct stat statbuf;
 127         char pathbuf[512];
 128
 129         /* Wait until wmii_path/rbar exists */
 130         for (; stat(wmii_path, &statbuf) < 0; sleep(interval));
 131
 132         cleanup_rbar_dir();
 133         if (wlan_interface)
 134                 create_file(concat(order[ORDER_WLAN],"wlan"));
 135         if (eth_interface)
 136                 create_file(concat(order[ORDER_ETH],"eth"));
 137         if (battery_path)
 138                 create_file(concat(order[ORDER_BATTERY],"battery"));
 139         create_file(concat(order[ORDER_LOAD],"load"));
 140         if (time_format)
 141                 create_file(concat(order[ORDER_TIME],"time"));
 142         for (i = 0; i < num_run_watches; i += 2) {
 143                 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 144                 create_file(pathbuf);
 145         }
 146
 147 }
 148
 149 /*
 150  * Writes the given message in the corresponding file in wmii's /rbar directory
 151  *
 152  */
 153 static void write_to_statusbar(const char *name, const char *message) {
 154         char pathbuf[strlen(wmii_path)+256+1];
 155         int fd;
 156
 157         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
 158         if ((fd = open(pathbuf, O_RDWR)) == -1) {
 159                 /* Try to re-setup stuff and just continue */
 160                 setup();
 161                 return;
 162         }
 163         if (write(fd, message, strlen(message)) != (ssize_t)strlen(message))
 164                 exit(EXIT_FAILURE);
 165         (void)close(fd);
 166 }
 167
 168 /*
 169  * Writes an errormessage to statusbar
 170  *
 171  */
 172 static void write_error_to_statusbar(const char *message) {
 173         cleanup_rbar_dir();
 174         create_file("error");
 175         write_to_statusbar("error", message);
 176 }
 177
 178 /*
 179  * Write errormessage to statusbar and exit
 180  *
 181  */
 182 void die(const char *fmt, ...) {
 183         char buffer[512];
 184         va_list ap;
 185         va_start(ap, fmt);
 186         (void)vsnprintf(buffer, sizeof(buffer), fmt, ap);
 187         va_end(ap);
 188
 189         if (wmii_path != NULL)
 190                 write_error_to_statusbar(buffer);
 191         exit(EXIT_FAILURE);
 192 }
 193
 194 static char *skip_character(char *input, char character, int amount) {
 195         char *walk;
 196         size_t len = strlen(input);
 197         int blanks = 0;
 198
 199         for (walk = input; ((size_t)(walk - input) < len) && (blanks < amount); walk++)
 200                 if (*walk == character)
 201                         blanks++;
 202
 203         return (walk == input ? walk : walk-1);
 204 }
 205
 206 /*
 207  * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
 208  * not the full capacity.
 209  *
 210  */
 211 static char *get_battery_info() {
 212         char buf[1024];
 213         static char part[512];
 214         char *walk, *last;
 215         int fd;
 216         int full_design = -1,
 217             remaining = -1,
 218             present_rate = -1;
 219         charging_status_t status = CS_DISCHARGING;
 220
 221         if ((fd = open(battery_path, O_RDONLY)) == -1)
 222                 die("Could not open %s", battery_path);
 223
 224         memset(part, 0, sizeof(part));
 225         (void)read(fd, buf, sizeof(buf));
 226         for (walk = buf, last = buf; (walk-buf) < 1024; walk++)
 227                 if (*walk == '=') {
 228                         if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN") ||
 229                             BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN"))
 230                                 full_design = atoi(walk+1);
 231                         else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
 232                                  BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
 233                                 remaining = atoi(walk+1);
 234                         else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
 235                                 present_rate = atoi(walk+1);
 236                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
 237                                 status = CS_CHARGING;
 238                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
 239                                 status = CS_FULL;
 240                 } else if (*walk == '\n')
 241                         last = walk+1;
 242         (void)close(fd);
 243
 244         if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
 245                 float remaining_time, perc;
 246                 int seconds, hours, minutes;
 247                 if (status == CS_CHARGING)
 248                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 249                 else if (status == CS_DISCHARGING)
 250                         remaining_time = ((float)remaining / (float)present_rate);
 251                 else {
 252                         (void)snprintf(part, sizeof(part), "FULL");
 253                         return part;
 254                 }
 255                 perc = ((float)remaining / (float)full_design);
 256
 257                 seconds = (int)(remaining_time * 3600.0);
 258                 hours = seconds / 3600;
 259                 seconds -= (hours * 3600);
 260                 minutes = seconds / 60;
 261                 seconds -= (minutes * 60);
 262
 263                 (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
 264                         (status == CS_CHARGING? "CHR" : "BAT"),
 265                         (perc * 100), hours, minutes, seconds);
 266         }
 267         return part;
 268 }
 269
 270 /*
 271  * Just parses /proc/net/wireless
 272  *
 273  */
 274 static char *get_wireless_info() {
 275         char buf[1024];
 276         static char part[512];
 277         char *interfaces;
 278         int fd;
 279         memset(buf, 0, sizeof(buf));
 280         memset(part, 0, sizeof(part));
 281
 282         if ((fd = open("/proc/net/wireless", O_RDONLY)) == -1)
 283                 die("Could not open /proc/net/wireless");
 284         (void)read(fd, buf, sizeof(buf));
 285         (void)close(fd);
 286
 287         interfaces = skip_character(buf, '\n', 2) + 1;
 288         while (interfaces < buf+strlen(buf)) {
 289                 while (isspace((int)*interfaces))
 290                         interfaces++;
 291                 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
 292                         int quality;
 293                         /* Skip status field (0000) */
 294                         interfaces += strlen(wlan_interface) + 2;
 295                         interfaces = skip_character(interfaces, ' ', 1);
 296                         while (isspace((int)*interfaces))
 297                                 interfaces++;
 298                         quality = atoi(interfaces);
 299                         /* For some reason, I get 255 sometimes */
 300                         if ((quality == 255) || (quality == 0)) {
 301                         if (use_colors)
 302                                 (void)snprintf(part, sizeof(part), "%s%s", concat("#FF0000 ", wmii_normcolors), " W: down");
 303                         else (void)snprintf(part, sizeof(part), "W: down");
 304
 305                         } else {
 306                                 const char *ip_address;
 307                                 (void)snprintf(part, sizeof(part), "W: (%03d%%) ", quality);
 308                                 ip_address = get_ip_address(wlan_interface);
 309                                 strcpy(part+strlen(part), ip_address);
 310                         }
 311
 312                         return part;
 313                 }
 314                 interfaces = skip_character(interfaces, '\n', 1) + 1;
 315         }
 316
 317         return part;
 318 }
 319
 320 static const char *get_ip_address(const char *interface) {
 321         static char part[512];
 322         struct ifreq ifr;
 323         int fd;
 324         memset(part, 0, sizeof(part));
 325
 326         fd = socket(AF_INET, SOCK_DGRAM, 0);
 327
 328         strcpy(ifr.ifr_name, interface);
 329         if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0)
 330                 die("Could not get interface flags (SIOCGIFFLAGS)");
 331
 332         if (!(ifr.ifr_flags & IFF_UP) ||
 333             !(ifr.ifr_flags & IFF_RUNNING)) {
 334                 close(fd);
 335                 return NULL;
 336         }
 337
 338         strcpy(ifr.ifr_name, interface);
 339         ifr.ifr_addr.sa_family = AF_INET;
 340         if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
 341                 struct sockaddr_in addr;
 342                 memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
 343                 (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, (socklen_t)sizeof(struct sockaddr_in));
 344                 if (strlen(part) == 0)
 345                         snprintf(part, sizeof(part), "no IP");
 346         }
 347
 348         (void)close(fd);
 349         return part;
 350 }
 351
 352 static char *get_eth_info() {
 353         static char part[512];
 354         const char *ip_address = get_ip_address(eth_interface);
 355         int ethspeed = 0;
 356
 357         if (get_ethspeed) {
 358                 struct ifreq ifr;
 359                 struct ethtool_cmd ecmd;
 360                 int fd, err;
 361
 362                 if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
 363                         write_error_to_statusbar("Could not open socket");
 364
 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 ((err = ioctl(fd, SIOCETHTOOL, &ifr)) == 0)
 370                         ethspeed = ecmd.speed;
 371                 else write_error_to_statusbar("Could not get interface speed. Insufficient privileges?");
 372
 373                 (void)close(fd);
 374         }
 375
 376         if (ip_address == NULL)
 377                 (void)snprintf(part, sizeof(part), "E: down");
 378         else {
 379                 if (get_ethspeed)
 380                         (void)snprintf(part, sizeof(part), "E: %s (%d Mbit/s)", ip_address, ethspeed);
 381                 else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
 382         }
 383
 384         return part;
 385 }
 386
 387 /*
 388  * Checks if the PID in path is still valid by checking if /proc/<pid> exists
 389  *
 390  */
 391 static bool process_runs(const char *path) {
 392         char pidbuf[512],
 393              procbuf[512],
 394              *walk;
 395         ssize_t n;
 396         static glob_t globbuf;
 397         struct stat statbuf;
 398         const char *real_path;
 399         int fd;
 400
 401         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
 402                 die("glob() failed");
 403         real_path = (globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
 404         fd = open(real_path, O_RDONLY);
 405         globfree(&globbuf);
 406         if (fd < 0)
 407                 return false;
 408         if ((n = read(fd, pidbuf, sizeof(pidbuf))) > 0)
 409                 pidbuf[n] = '\0';
 410         (void)close(fd);
 411         for (walk = pidbuf; *walk != '\0'; walk++)
 412                 if (!isdigit((int)(*walk))) {
 413                         *walk = '\0';
 414                         break;
 415                 }
 416         (void)snprintf(procbuf, sizeof(procbuf), "/proc/%s", pidbuf);
 417         return (stat(procbuf, &statbuf) >= 0);
 418 }
 419
 420 int main(int argc, char *argv[]) {
 421         char part[512],
 422              pathbuf[512],
 423              *end;
 424         unsigned int i;
 425         int load_avg;
 426
 427         char *configfile = PREFIX "/etc/wmiistatus.conf";
 428         int o, option_index = 0;
 429         struct option long_options[] = {
 430                 {"config", required_argument, 0, 'c'},
 431                 {0, 0, 0, 0}
 432         };
 433
 434         while ((o = getopt_long(argc, argv, "c:", long_options, &option_index)) != -1)
 435                 if ((char)o == 'c')
 436                         configfile = optarg;
 437
 438         if (load_configuration(configfile) < 0)
 439                 return EXIT_FAILURE;
 440
 441         setup();
 442
 443         while (1) {
 444                 for (i = 0; i < num_run_watches; i += 2) {
 445                         bool running = process_runs(run_watches[i+1]);
 446                         if (use_colors)
 447                                 snprintf(part, sizeof(part), "%s %s: %s",
 448                                         (running ?
 449                                                 concat("#00FF00 ", wmii_normcolors) :
 450                                                 concat("#FF0000 ", wmii_normcolors)),
 451                                         run_watches[i],
 452                                         (running ? "yes" : "no"));
 453                         else snprintf(part, sizeof(part), "%s: %s", run_watches[i], (running ? "yes" : "no"));
 454                         snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 455                         write_to_statusbar(pathbuf, part);
 456                 }
 457
 458                 if (wlan_interface)
 459                         write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info());
 460                 if (eth_interface)
 461                         write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info());
 462                 if (battery_path)
 463                         write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info());
 464
 465                 /* Get load */
 466                 if ((load_avg = open("/proc/loadavg", O_RDONLY)) == -1)
 467                         die("Could not open /proc/loadavg");
 468                 (void)read(load_avg, part, sizeof(part));
 469                 (void)close(load_avg);
 470                 end = skip_character(part, ' ', 3);
 471                 *end = '\0';
 472                 write_to_statusbar(concat(order[ORDER_LOAD], "load"), part);
 473
 474                 if (time_format) {
 475                         /* Get date & time */
 476                         time_t current_time = time(NULL);
 477                         struct tm *current_tm = localtime(&current_time);
 478                         (void)strftime(part, sizeof(part), time_format, current_tm);
 479                         write_to_statusbar(concat(order[ORDER_TIME], "time"), part);
 480                 }
 481
 482                 sleep(interval);
 483         }
 484 }