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         (void)snprintf(concatbuf, sizeof(concatbuf), "%s%s", str1, str2);
  68         return concatbuf;
  69 }
  70
  71 /*
  72  * Cleans wmii's /rbar directory by deleting all regular files
  73  *
  74  */
  75 static void cleanup_rbar_dir() {
  76         struct dirent *ent;
  77         DIR *dir;
  78         char pathbuf[strlen(wmii_path)+256+1];
  79
  80         if ((dir = opendir(wmii_path)) == NULL)
  81                 exit(EXIT_FAILURE);
  82
  83         while ((ent = readdir(dir)) != NULL) {
  84                 if (ent->d_type == DT_REG) {
  85                         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, ent->d_name);
  86                         if (unlink(pathbuf) == -1)
  87                                 exit(EXIT_FAILURE);
  88                 }
  89         }
  90
  91         (void)closedir(dir);
  92 }
  93
  94 /*
  95  * Creates the specified file in wmii's /rbar directory with
  96  * correct modes and initializes colors if colormode is enabled
  97  * '
  98  */
  99 static void create_file(const char *name) {
 100         char pathbuf[strlen(wmii_path)+256+1];
 101         int fd;
 102
 103         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
 104         if ((fd = open(pathbuf, O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0)
 105                 exit(EXIT_FAILURE);
 106         if (use_colors) {
 107                 char *tmp = concat("#888888 ", wmii_normcolors);
 108                 if (write(fd, tmp, strlen(tmp)) != (ssize_t)strlen(tmp))
 109                         exit(EXIT_FAILURE);
 110         }
 111         (void)close(fd);
 112 }
 113
 114 /*
 115  * Writes the given message in the corresponding file in wmii's /rbar directory
 116  *
 117  */
 118 static void write_to_statusbar(const char *name, const char *message) {
 119         char pathbuf[strlen(wmii_path)+256+1];
 120         int fd;
 121
 122         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
 123         if ((fd = open(pathbuf, O_RDWR)) == -1)
 124                 exit(EXIT_FAILURE);
 125         if (write(fd, message, strlen(message)) != (ssize_t)strlen(message))
 126                 exit(EXIT_FAILURE);
 127         (void)close(fd);
 128 }
 129
 130 /*
 131  * Writes an errormessage to statusbar
 132  *
 133  */
 134 static void write_error_to_statusbar(const char *message) {
 135         cleanup_rbar_dir();
 136         create_file("error");
 137         write_to_statusbar("error", message);
 138 }
 139
 140 /*
 141  * Write errormessage to statusbar and exit
 142  *
 143  */
 144 void die(const char *fmt, ...) {
 145         char buffer[512];
 146         va_list ap;
 147         va_start(ap, fmt);
 148         (void)vsnprintf(buffer, sizeof(buffer), fmt, ap);
 149         va_end(ap);
 150
 151         write_error_to_statusbar(buffer);
 152         exit(EXIT_FAILURE);
 153 }
 154
 155 static char *skip_character(char *input, char character, int amount) {
 156         char *walk;
 157         size_t len = strlen(input);
 158         int blanks = 0;
 159
 160         for (walk = input; ((size_t)(walk - input) < len) && (blanks < amount); walk++)
 161                 if (*walk == character)
 162                         blanks++;
 163
 164         return (walk == input ? walk : walk-1);
 165 }
 166
 167 /*
 168  * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage,
 169  * not the full capacity.
 170  *
 171  */
 172 static char *get_battery_info() {
 173         char buf[1024];
 174         static char part[512];
 175         char *walk, *last;
 176         int fd;
 177         int full_design = -1,
 178             remaining = -1,
 179             present_rate = -1;
 180         charging_status_t status = CS_DISCHARGING;
 181
 182         if ((fd = open(battery_path, O_RDONLY)) == -1)
 183                 die("Could not open %s", battery_path);
 184
 185         memset(part, 0, sizeof(part));
 186         (void)read(fd, buf, sizeof(buf));
 187         for (walk = buf, last = buf; (walk-buf) < 1024; walk++)
 188                 if (*walk == '=') {
 189                         if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
 190                                 full_design = atoi(walk+1);
 191                         else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW"))
 192                                 remaining = atoi(walk+1);
 193                         else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
 194                                 present_rate = atoi(walk+1);
 195                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
 196                                 status = CS_CHARGING;
 197                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
 198                                 status = CS_FULL;
 199                 } else if (*walk == '\n')
 200                         last = walk+1;
 201         (void)close(fd);
 202
 203         if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
 204                 float remaining_time, perc;
 205                 int seconds, hours, minutes;
 206                 if (status == CS_CHARGING)
 207                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 208                 else if (status == CS_DISCHARGING)
 209                         remaining_time = ((float)remaining / (float)present_rate);
 210                 else {
 211                         (void)snprintf(part, sizeof(part), "FULL");
 212                         return part;
 213                 }
 214                 perc = ((float)remaining / (float)full_design);
 215
 216                 seconds = (int)(remaining_time * 3600.0);
 217                 hours = seconds / 3600;
 218                 seconds -= (hours * 3600);
 219                 minutes = seconds / 60;
 220                 seconds -= (minutes * 60);
 221
 222                 (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
 223                         (status == CS_CHARGING? "CHR" : "BAT"),
 224                         (perc * 100), hours, minutes, seconds);
 225         }
 226         return part;
 227 }
 228
 229 /*
 230  * Just parses /proc/net/wireless
 231  *
 232  */
 233 static char *get_wireless_info() {
 234         char buf[1024];
 235         static char part[512];
 236         char *interfaces;
 237         int fd;
 238         memset(buf, 0, sizeof(buf));
 239         memset(part, 0, sizeof(part));
 240
 241         if ((fd = open("/proc/net/wireless", O_RDONLY)) == -1)
 242                 die("Could not open /proc/net/wireless");
 243         (void)read(fd, buf, sizeof(buf));
 244         (void)close(fd);
 245
 246         interfaces = skip_character(buf, '\n', 2) + 1;
 247         while (interfaces < buf+strlen(buf)) {
 248                 while (isspace((int)*interfaces))
 249                         interfaces++;
 250                 if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) {
 251                         int quality;
 252                         /* Skip status field (0000) */
 253                         interfaces += strlen(wlan_interface) + 2;
 254                         interfaces = skip_character(interfaces, ' ', 1);
 255                         while (isspace((int)*interfaces))
 256                                 interfaces++;
 257                         quality = atoi(interfaces);
 258                         /* For some reason, I get 255 sometimes */
 259                         if ((quality == 255) || (quality == 0)) {
 260                         if (use_colors)
 261                                 (void)snprintf(part, sizeof(part), "%s%s", concat("#FF0000 ", wmii_normcolors), " W: down");
 262                         else (void)snprintf(part, sizeof(part), "W: down");
 263
 264                         } else {
 265                                 char *ip_address;
 266                                 (void)snprintf(part, sizeof(part), "W: (%02d%%) ", quality);
 267                                 ip_address = get_ip_address(wlan_interface);
 268                                 strcpy(part+strlen(part), ip_address);
 269                         }
 270
 271                         return part;
 272                 }
 273                 interfaces = skip_character(interfaces, '\n', 1) + 1;
 274         }
 275
 276         return part;
 277 }
 278
 279 static const char *get_ip_address(const char *interface) {
 280         static char part[512];
 281         struct ifreq ifr;
 282         int fd;
 283         memset(part, 0, sizeof(part));
 284
 285         fd = socket(AF_INET, SOCK_DGRAM, 0);
 286
 287         strcpy(ifr.ifr_name, interface);
 288         if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0)
 289                 die("Could not get interface flags (SIOCGIFFLAGS)");
 290
 291         if (!(ifr.ifr_flags & IFF_UP) ||
 292             !(ifr.ifr_flags & IFF_RUNNING)) {
 293                 close(fd);
 294                 return NULL;
 295         }
 296
 297         strcpy(ifr.ifr_name, interface);
 298         ifr.ifr_addr.sa_family = AF_INET;
 299         if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
 300                 struct sockaddr_in addr;
 301                 memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in));
 302                 (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, (socklen_t)sizeof(struct sockaddr_in));
 303                 if (strlen(part) == 0)
 304                         snprintf(part, sizeof(part), "no IP");
 305         }
 306
 307         (void)close(fd);
 308         return part;
 309 }
 310
 311 static char *get_eth_info() {
 312         static char part[512];
 313         const char *ip_address = get_ip_address(eth_interface);
 314
 315         if (ip_address == NULL)
 316                 (void)snprintf(part, sizeof(part), "E: down");
 317         else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
 318
 319         return part;
 320 }
 321
 322 /*
 323  * Checks if the PID in path is still valid by checking if /proc/<pid> exists
 324  *
 325  */
 326 static bool process_runs(const char *path) {
 327         char pidbuf[512],
 328              procbuf[512],
 329              *walk;
 330         ssize_t n;
 331         static glob_t globbuf;
 332         struct stat statbuf;
 333         const char *real_path;
 334         int fd;
 335
 336         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
 337                 die("glob() failed");
 338         real_path = (globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
 339         fd = open(real_path, O_RDONLY);
 340         globfree(&globbuf);
 341         if (fd < 0)
 342                 return false;
 343         if ((n = read(fd, pidbuf, sizeof(pidbuf))) > 0)
 344                 pidbuf[n] = '\0';
 345         (void)close(fd);
 346         for (walk = pidbuf; *walk != '\0'; walk++)
 347                 if (!isdigit((int)(*walk))) {
 348                         *walk = '\0';
 349                         break;
 350                 }
 351         (void)snprintf(procbuf, sizeof(procbuf), "/proc/%s", pidbuf);
 352         return (stat(procbuf, &statbuf) >= 0);
 353 }
 354
 355 int main(int argc, char *argv[]) {
 356         char part[512],
 357              pathbuf[512],
 358              *end;
 359         unsigned int i;
 360         int load_avg;
 361
 362         char *configfile = PREFIX "/etc/wmiistatus.conf";
 363         int o, option_index = 0;
 364         struct option long_options[] = {
 365                 {"config", required_argument, 0, 'c'},
 366                 {0, 0, 0, 0}
 367         };
 368
 369         while ((o = getopt_long(argc, argv, "c:", long_options, &option_index)) != -1)
 370                 if ((char)o == 'c')
 371                         configfile = optarg;
 372
 373         load_configuration(configfile);
 374         cleanup_rbar_dir();
 375         if (wlan_interface)
 376                 create_file(concat(order[ORDER_WLAN],"wlan"));
 377         if (eth_interface)
 378                 create_file(concat(order[ORDER_ETH],"eth"));
 379         if (battery_path)
 380                 create_file(concat(order[ORDER_BATTERY],"battery"));
 381         create_file(concat(order[ORDER_LOAD],"load"));
 382         if (time_format)
 383                 create_file(concat(order[ORDER_TIME],"time"));
 384         for (i = 0; i < num_run_watches; i += 2) {
 385                 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 386                 create_file(pathbuf);
 387         }
 388
 389         while (1) {
 390                 for (i = 0; i < num_run_watches; i += 2) {
 391                         bool running = process_runs(run_watches[i+1]);
 392                         if (use_colors)
 393                                 snprintf(part, sizeof(part), "%s %s: %s",
 394                                         (running ?
 395                                                 concat("#00FF00 ", wmii_normcolors) :
 396                                                 concat("#FF0000 ", wmii_normcolors)),
 397                                         run_watches[i],
 398                                         (running ? "yes" : "no"));
 399                         else snprintf(part, sizeof(part), "%s: %s", run_watches[i], (running ? "yes" : "no"));
 400                         snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 401                         write_to_statusbar(pathbuf, part);
 402                 }
 403
 404                 if (wlan_interface)
 405                         write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info());
 406                 if (eth_interface)
 407                         write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info());
 408                 if (battery_path)
 409                         write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info());
 410
 411                 /* Get load */
 412                 if ((load_avg = open("/proc/loadavg", O_RDONLY)) == -1)
 413                         die("Could not open /proc/loadavg");
 414                 (void)read(load_avg, part, sizeof(part));
 415                 (void)close(load_avg);
 416                 end = skip_character(part, ' ', 3);
 417                 *end = '\0';
 418                 write_to_statusbar(concat(order[ORDER_LOAD], "load"), part);
 419
 420                 if (time_format) {
 421                         /* Get date & time */
 422                         time_t current_time = time(NULL);
 423                         struct tm *current_tm = localtime(&current_time);
 424                         (void)strftime(part, sizeof(part), time_format, current_tm);
 425                         write_to_statusbar(concat(order[ORDER_TIME], "time"), part);
 426                 }
 427
 428                 sleep(interval);
 429         }
 430 }