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 static void setup(void) {
 118         unsigned int i;
 119         struct stat statbuf;
 120         char pathbuf[512];
 121
 122         /* Wait until wmii_path/rbar exists */
 123         for (; stat(wmii_path, &statbuf) < 0; sleep(interval));
 124
 125         cleanup_rbar_dir();
 126         if (wlan_interface)
 127                 create_file(concat(order[ORDER_WLAN],"wlan"));
 128         if (eth_interface)
 129                 create_file(concat(order[ORDER_ETH],"eth"));
 130         if (battery_path)
 131                 create_file(concat(order[ORDER_BATTERY],"battery"));
 132         create_file(concat(order[ORDER_LOAD],"load"));
 133         if (time_format)
 134                 create_file(concat(order[ORDER_TIME],"time"));
 135         for (i = 0; i < num_run_watches; i += 2) {
 136                 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 137                 create_file(pathbuf);
 138         }
 139
 140 }
 141
 142 /*
 143  * Writes the given message in the corresponding file in wmii's /rbar directory
 144  *
 145  */
 146 static void write_to_statusbar(const char *name, const char *message) {
 147         char pathbuf[strlen(wmii_path)+256+1];
 148         int fd;
 149
 150         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
 151         if ((fd = open(pathbuf, O_RDWR)) == -1) {
 152                 /* Try to re-setup stuff and just continue */
 153                 setup();
 154                 return;
 155         }
 156         if (write(fd, message, strlen(message)) != (ssize_t)strlen(message))
 157                 exit(EXIT_FAILURE);
 158         (void)close(fd);
 159 }
 160
 161 /*
 162  * Writes an errormessage to statusbar
 163  *
 164  */
 165 static void write_error_to_statusbar(const char *message) {
 166         cleanup_rbar_dir();
 167         create_file("error");
 168         write_to_statusbar("error", message);
 169 }
 170
 171 /*
 172  * Write errormessage to statusbar and exit
 173  *
 174  */
 175 void die(const char *fmt, ...) {
 176         char buffer[512];
 177         va_list ap;
 178         va_start(ap, fmt);
 179         (void)vsnprintf(buffer, sizeof(buffer), fmt, ap);
 180         va_end(ap);
 181
 182         if (wmii_path != NULL)
 183                 write_error_to_statusbar(buffer);
 184         exit(EXIT_FAILURE);
 185 }
 186
 187 static char *skip_character(char *input, char character, int amount) {
 188         char *walk;
 189         size_t len = strlen(input);
 190         int blanks = 0;
 191
 192         for (walk = input; ((size_t)(walk - input) < len) && (blanks < amount); walk++)
 193                 if (*walk == character)
 194                         blanks++;
 195
 196         return (walk == input ? walk : walk-1);
 197 }
 198
 199 /*
 200  * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
 201  * not the full capacity.
 202  *
 203  */
 204 static char *get_battery_info() {
 205         char buf[1024];
 206         static char part[512];
 207         char *walk, *last;
 208         int fd;
 209         int full_design = -1,
 210             remaining = -1,
 211             present_rate = -1;
 212         charging_status_t status = CS_DISCHARGING;
 213
 214         if ((fd = open(battery_path, O_RDONLY)) == -1)
 215                 die("Could not open %s", battery_path);
 216
 217         memset(part, 0, sizeof(part));
 218         (void)read(fd, buf, sizeof(buf));
 219         for (walk = buf, last = buf; (walk-buf) < 1024; walk++)
 220                 if (*walk == '=') {
 221                         if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN") ||
 222                             BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN"))
 223                                 full_design = atoi(walk+1);
 224                         else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
 225                                  BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
 226                                 remaining = atoi(walk+1);
 227                         else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
 228                                 present_rate = atoi(walk+1);
 229                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
 230                                 status = CS_CHARGING;
 231                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
 232                                 status = CS_FULL;
 233                 } else if (*walk == '\n')
 234                         last = walk+1;
 235         (void)close(fd);
 236
 237         if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
 238                 float remaining_time, perc;
 239                 int seconds, hours, minutes;
 240                 if (status == CS_CHARGING)
 241                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 242                 else if (status == CS_DISCHARGING)
 243                         remaining_time = ((float)remaining / (float)present_rate);
 244                 else {
 245                         (void)snprintf(part, sizeof(part), "FULL");
 246                         return part;
 247                 }
 248                 perc = ((float)remaining / (float)full_design);
 249
 250                 seconds = (int)(remaining_time * 3600.0);
 251                 hours = seconds / 3600;
 252                 seconds -= (hours * 3600);
 253                 minutes = seconds / 60;
 254                 seconds -= (minutes * 60);
 255
 256                 (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
 257                         (status == CS_CHARGING? "CHR" : "BAT"),
 258                         (perc * 100), hours, minutes, seconds);
 259         }
 260         return part;
 261 }
 262
 263 /*
 264  * Just parses /proc/net/wireless
 265  *
 266  */
 267 static char *get_wireless_info() {
 268         char buf[1024];
 269         static char part[512];
 270         char *interfaces;
 271         int fd;
 272         memset(buf, 0, sizeof(buf));
 273         memset(part, 0, sizeof(part));
 274
 275         if ((fd = open("/proc/net/wireless", O_RDONLY)) == -1)
 276                 die("Could not open /proc/net/wireless");
 277         (void)read(fd, buf, sizeof(buf));
 278         (void)close(fd);
 279
 280         interfaces = skip_character(buf, '\n', 2) + 1;
 281         while (interfaces < buf+strlen(buf)) {
 282                 while (isspace((int)*interfaces))
 283                         interfaces++;
 284                 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
 285                         int quality;
 286                         /* Skip status field (0000) */
 287                         interfaces += strlen(wlan_interface) + 2;
 288                         interfaces = skip_character(interfaces, ' ', 1);
 289                         while (isspace((int)*interfaces))
 290                                 interfaces++;
 291                         quality = atoi(interfaces);
 292                         /* For some reason, I get 255 sometimes */
 293                         if ((quality == 255) || (quality == 0)) {
 294                         if (use_colors)
 295                                 (void)snprintf(part, sizeof(part), "%s%s", concat("#FF0000 ", wmii_normcolors), " W: down");
 296                         else (void)snprintf(part, sizeof(part), "W: down");
 297
 298                         } else {
 299                                 const char *ip_address;
 300                                 (void)snprintf(part, sizeof(part), "W: (%03d%%) ", quality);
 301                                 ip_address = get_ip_address(wlan_interface);
 302                                 strcpy(part+strlen(part), ip_address);
 303                         }
 304
 305                         return part;
 306                 }
 307                 interfaces = skip_character(interfaces, '\n', 1) + 1;
 308         }
 309
 310         return part;
 311 }
 312
 313 static const char *get_ip_address(const char *interface) {
 314         static char part[512];
 315         struct ifreq ifr;
 316         int fd;
 317         memset(part, 0, sizeof(part));
 318
 319         fd = socket(AF_INET, SOCK_DGRAM, 0);
 320
 321         strcpy(ifr.ifr_name, interface);
 322         if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0)
 323                 die("Could not get interface flags (SIOCGIFFLAGS)");
 324
 325         if (!(ifr.ifr_flags & IFF_UP) ||
 326             !(ifr.ifr_flags & IFF_RUNNING)) {
 327                 close(fd);
 328                 return NULL;
 329         }
 330
 331         strcpy(ifr.ifr_name, interface);
 332         ifr.ifr_addr.sa_family = AF_INET;
 333         if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
 334                 struct sockaddr_in addr;
 335                 memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
 336                 (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, (socklen_t)sizeof(struct sockaddr_in));
 337                 if (strlen(part) == 0)
 338                         snprintf(part, sizeof(part), "no IP");
 339         }
 340
 341         (void)close(fd);
 342         return part;
 343 }
 344
 345 static char *get_eth_info() {
 346         static char part[512];
 347         const char *ip_address = get_ip_address(eth_interface);
 348         int ethspeed = 0;
 349
 350         if (get_ethspeed) {
 351                 struct ifreq ifr;
 352                 struct ethtool_cmd ecmd;
 353                 int fd, err;
 354
 355                 if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
 356                         write_error_to_statusbar("Could not open socket");
 357
 358                 ecmd.cmd = ETHTOOL_GSET;
 359                 (void)memset(&ifr, 0, sizeof(ifr));
 360                 ifr.ifr_data = (caddr_t)&ecmd;
 361                 (void)strcpy(ifr.ifr_name, eth_interface);
 362                 if ((err = ioctl(fd, SIOCETHTOOL, &ifr)) == 0)
 363                         ethspeed = ecmd.speed;
 364                 else write_error_to_statusbar("Could not get interface speed. Insufficient privileges?");
 365
 366                 (void)close(fd);
 367         }
 368
 369         if (ip_address == NULL)
 370                 (void)snprintf(part, sizeof(part), "E: down");
 371         else {
 372                 if (get_ethspeed)
 373                         (void)snprintf(part, sizeof(part), "E: %s (%d Mbit/s)", ip_address, ethspeed);
 374                 else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
 375         }
 376
 377         return part;
 378 }
 379
 380 /*
 381  * Checks if the PID in path is still valid by checking if /proc/<pid> exists
 382  *
 383  */
 384 static bool process_runs(const char *path) {
 385         char pidbuf[512],
 386              procbuf[512],
 387              *walk;
 388         ssize_t n;
 389         static glob_t globbuf;
 390         struct stat statbuf;
 391         const char *real_path;
 392         int fd;
 393
 394         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
 395                 die("glob() failed");
 396         real_path = (globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
 397         fd = open(real_path, O_RDONLY);
 398         globfree(&globbuf);
 399         if (fd < 0)
 400                 return false;
 401         if ((n = read(fd, pidbuf, sizeof(pidbuf))) > 0)
 402                 pidbuf[n] = '\0';
 403         (void)close(fd);
 404         for (walk = pidbuf; *walk != '\0'; walk++)
 405                 if (!isdigit((int)(*walk))) {
 406                         *walk = '\0';
 407                         break;
 408                 }
 409         (void)snprintf(procbuf, sizeof(procbuf), "/proc/%s", pidbuf);
 410         return (stat(procbuf, &statbuf) >= 0);
 411 }
 412
 413 int main(int argc, char *argv[]) {
 414         char part[512],
 415              pathbuf[512],
 416              *end;
 417         unsigned int i;
 418         int load_avg;
 419
 420         char *configfile = PREFIX "/etc/wmiistatus.conf";
 421         int o, option_index = 0;
 422         struct option long_options[] = {
 423                 {"config", required_argument, 0, 'c'},
 424                 {0, 0, 0, 0}
 425         };
 426
 427         while ((o = getopt_long(argc, argv, "c:", long_options, &option_index)) != -1)
 428                 if ((char)o == 'c')
 429                         configfile = optarg;
 430
 431         if (load_configuration(configfile) < 0)
 432                 return EXIT_FAILURE;
 433
 434         setup();
 435
 436         while (1) {
 437                 for (i = 0; i < num_run_watches; i += 2) {
 438                         bool running = process_runs(run_watches[i+1]);
 439                         if (use_colors)
 440                                 snprintf(part, sizeof(part), "%s %s: %s",
 441                                         (running ?
 442                                                 concat("#00FF00 ", wmii_normcolors) :
 443                                                 concat("#FF0000 ", wmii_normcolors)),
 444                                         run_watches[i],
 445                                         (running ? "yes" : "no"));
 446                         else snprintf(part, sizeof(part), "%s: %s", run_watches[i], (running ? "yes" : "no"));
 447                         snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 448                         write_to_statusbar(pathbuf, part);
 449                 }
 450
 451                 if (wlan_interface)
 452                         write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info());
 453                 if (eth_interface)
 454                         write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info());
 455                 if (battery_path)
 456                         write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info());
 457
 458                 /* Get load */
 459                 if ((load_avg = open("/proc/loadavg", O_RDONLY)) == -1)
 460                         die("Could not open /proc/loadavg");
 461                 (void)read(load_avg, part, sizeof(part));
 462                 (void)close(load_avg);
 463                 end = skip_character(part, ' ', 3);
 464                 *end = '\0';
 465                 write_to_statusbar(concat(order[ORDER_LOAD], "load"), part);
 466
 467                 if (time_format) {
 468                         /* Get date & time */
 469                         time_t current_time = time(NULL);
 470                         struct tm *current_tm = localtime(&current_time);
 471                         (void)strftime(part, sizeof(part), time_format, current_tm);
 472                         write_to_statusbar(concat(order[ORDER_TIME], "time"), part);
 473                 }
 474
 475                 sleep(interval);
 476         }
 477 }