i3status/i3status.c

/*
 * vim:ts=8:expandtab
 *
 * i3status – Generates a status line for dzen2 or wmii
 *
 *
 * Copyright © 2008-2009 Michael Stapelberg and contributors
 * Copyright © 2009 Thorsten Toepper <atsutane at freethoughts dot de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright notice, this
 *   list of conditions and the following disclaimer in the documentation and/or other
 *   materials provided with the distribution.
 *
 * * Neither the name of Michael Stapelberg nor the names of contributors
 *   may be used to endorse or promote products derived from this software without
 *   specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#include <time.h>
#include <stdbool.h>
#include <stdarg.h>
#include <unistd.h>
#include <stdlib.h>
#include <limits.h>
#include <ctype.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <glob.h>
#include <dirent.h>
#include <getopt.h>
#include <signal.h>

#include "queue.h"

#ifdef LINUX
#include <linux/ethtool.h>
#include <linux/sockios.h>
#else
/* TODO: correctly check for *BSD */
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/resource.h>
#endif

#include "i3status.h"

#define BAR "^fg(#333333)^p(5;-2)^ro(2)^p()^fg()^p(5)"

struct battery {
        char *path;
        /* Use last full capacity instead of design capacity */
        bool use_last_full;
        SIMPLEQ_ENTRY(battery) batteries;
};

SIMPLEQ_HEAD(battery_head, battery) batteries;

/* socket file descriptor for general purposes */
static int general_socket;

static const char *wlan_interface;
static const char *eth_interface;
static char *wmii_path;
static const char *time_format;
static bool use_colors;
static bool get_ethspeed;
static bool get_cpu_temperature;
static char *thermal_zone;
static const char *wmii_normcolors = "#222222 #333333";
static char order[MAX_ORDER][2];
static const char **run_watches;
static unsigned int num_run_watches;
static unsigned int interval = 1;

static int max(int a, int b) {
        return (a > b ? a : b);
}

/*
 * This function just concats two strings in place, it should only be used
 * for concatting order to the name of a file or concatting color codes.
 * Otherwise, the buffer size would have to be increased.
 *
 */
static char *concat(const char *str1, const char *str2) {
        static char concatbuf[32];
        (void)snprintf(concatbuf, sizeof(concatbuf), "%s%s", str1, str2);
        return concatbuf;
}

/*
 * Returns the correct color format for dzen (^fg(color)) or wmii (color <normcolors>)
 *
 */
static char *color(const char *colorstr) {
        static char colorbuf[32];
#ifdef DZEN
        (void)snprintf(colorbuf, sizeof(colorbuf), "^fg(%s)", colorstr);
#else
        (void)snprintf(colorbuf, sizeof(colorbuf), "%s %s ", colorstr, wmii_normcolors);
#endif
        return colorbuf;
}

/*
 * Cleans wmii's /rbar directory by deleting all regular files
 *
 */
static void cleanup_rbar_dir() {
#ifdef DZEN
        return;
#endif
        struct dirent *ent;
        DIR *dir;
        char pathbuf[strlen(wmii_path)+256+1];

        if ((dir = opendir(wmii_path)) == NULL)
                exit(EXIT_FAILURE);

        while ((ent = readdir(dir)) != NULL) {
                if (ent->d_type == DT_REG) {
                        (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, ent->d_name);
                        if (unlink(pathbuf) == -1)
                                exit(EXIT_FAILURE);
                }
        }

        (void)closedir(dir);
}

/*
 * Creates the specified file in wmii's /rbar directory with
 * correct modes and initializes colors if colormode is enabled
 *
 */
static void create_file(const char *name) {
#ifdef DZEN
        return;
#endif
        char pathbuf[strlen(wmii_path)+256+1];
        int fd;
        int flags = O_CREAT | O_WRONLY;
        struct stat statbuf;

        (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);

        /* Overwrite file's contents if it exists */
        if (stat(pathbuf, &statbuf) >= 0)
                flags |= O_TRUNC;

        if ((fd = open(pathbuf, flags, S_IRUSR | S_IWUSR)) < 0)
                exit(EXIT_FAILURE);
        if (use_colors) {
                char *tmp = color("#888888");
                if (write(fd, tmp, strlen(tmp)) != (ssize_t)strlen(tmp))
                        exit(EXIT_FAILURE);
        }
        (void)close(fd);
}

/*
 * Waits until wmii_path/rbar exists (= the filesystem gets mounted),
 * cleans up all files and creates the needed files
 *
 */
static void setup(void) {
        unsigned int i;
        char pathbuf[512];

#ifndef DZEN
        struct stat statbuf;
        /* Wait until wmii_path/rbar exists */
        for (; stat(wmii_path, &statbuf) < 0; sleep(interval));
#endif

        cleanup_rbar_dir();
        if (wlan_interface)
                create_file(concat(order[ORDER_WLAN],"wlan"));
        if (eth_interface)
                create_file(concat(order[ORDER_ETH],"eth"));
        if (get_cpu_temperature)
                create_file(concat(order[ORDER_CPU_TEMPERATURE], "cpu_temperature"));
        create_file(concat(order[ORDER_LOAD],"load"));
        if (time_format)
                create_file(concat(order[ORDER_TIME],"time"));
        for (i = 0; i < num_run_watches; i += 2) {
                snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
                create_file(pathbuf);
        }
}

/*
 * Writes the given message in the corresponding file in wmii's /rbar directory
 *
 */
static void write_to_statusbar(const char *name, const char *message, bool final_entry) {
#ifdef DZEN
        if (final_entry) {
                if (printf("%s^p(6)\n", message) < 0) {
                        perror("printf");
                        exit(1);
                }

                fflush(stdout);
                return;
        }
        if (printf("%s" BAR, message) < 0) {
                perror("printf");
                exit(1);
        }
        return;
#endif

        char pathbuf[strlen(wmii_path)+256+1];
        int fd;

        (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
        if ((fd = open(pathbuf, O_RDWR)) == -1) {
                /* Try to re-setup stuff and just continue */
                setup();
                return;
        }
        if (write(fd, message, strlen(message)) != (ssize_t)strlen(message))
                exit(EXIT_FAILURE);
        (void)close(fd);
}

/*
 * Writes an errormessage to statusbar
 *
 */
static void write_error_to_statusbar(const char *message) {
        cleanup_rbar_dir();
        create_file("error");
        write_to_statusbar("error", message, true);
}

/*
 * Write errormessage to statusbar and exit
 *
 */
void die(const char *fmt, ...) {
        char buffer[512];
        va_list ap;
        va_start(ap, fmt);
        (void)vsnprintf(buffer, sizeof(buffer), fmt, ap);
        va_end(ap);

        if (wmii_path != NULL)
                write_error_to_statusbar(buffer);
        else
                fprintf(stderr, "%s", buffer);
        exit(EXIT_FAILURE);
}

/*
 * Skip the given character for exactly 'amount' times, returns
 * a pointer to the first non-'character' character in 'input'.
 *
 */
static char *skip_character(char *input, char character, int amount) {
        char *walk;
        size_t len = strlen(input);
        int blanks = 0;

        for (walk = input; ((size_t)(walk - input) < len) && (blanks < amount); walk++)
                if (*walk == character)
                        blanks++;

        return (walk == input ? walk : walk-1);
}

/*
 * Get battery information from /sys. Note that it uses the design capacity to
 * calculate the percentage, not the last full capacity, so you can see how
 * worn off your battery is.
 *
 */
static char *get_battery_info(struct battery *bat) {
        char buf[1024];
        static char part[512];
        char *walk, *last;
        int fd;
        int full_design = -1,
            remaining = -1,
            present_rate = -1;
        charging_status_t status = CS_DISCHARGING;

        if ((fd = open(bat->path, O_RDONLY)) == -1)
                return "No battery found";

        memset(part, 0, sizeof(part));
        (void)read(fd, buf, sizeof(buf));
        for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
                if (*walk == '\n') {
                        last = walk+1;
                        continue;
                }

                if (*walk != '=')
                        continue;

                if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
                    BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
                        remaining = atoi(walk+1);
                else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
                        present_rate = atoi(walk+1);
                else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
                        status = CS_CHARGING;
                else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
                        status = CS_FULL;
                else {
                        /* The only thing left is the full capacity */
                        if (bat->use_last_full) {
                                if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
                                    !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
                                        continue;
                        } else {
                                if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
                                    !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
                                        continue;
                        }

                        full_design = atoi(walk+1);
                }
        }
        (void)close(fd);

        if ((full_design == 1) || (remaining == -1))
                return part;

        if (present_rate > 0) {
                float remaining_time;
                int seconds, hours, minutes;
                if (status == CS_CHARGING)
                        remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
                else if (status == CS_DISCHARGING)
                        remaining_time = ((float)remaining / (float)present_rate);
                else remaining_time = 0;

                seconds = (int)(remaining_time * 3600.0);
                hours = seconds / 3600;
                seconds -= (hours * 3600);
                minutes = seconds / 60;
                seconds -= (minutes * 60);

                (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
                        (status == CS_CHARGING ? "CHR" :
                         (status == CS_DISCHARGING ? "BAT" : "FULL")),
                        (((float)remaining / (float)full_design) * 100),
                        max(hours, 0), max(minutes, 0), max(seconds, 0));
        } else {
                (void)snprintf(part, sizeof(part), "%s %.02f%%",
                        (status == CS_CHARGING ? "CHR" :
                         (status == CS_DISCHARGING ? "BAT" : "FULL")),
                        (((float)remaining / (float)full_design) * 100));
        }
        return part;
}

/*
 * Return the IP address for the given interface or "no IP" if the
 * interface is up and running but hasn't got an IP address yet
 *
 */
static const char *get_ip_address(const char *interface) {
        static char part[512];
        struct ifreq ifr;
        struct sockaddr_in addr;
        socklen_t len = sizeof(struct sockaddr_in);
        memset(part, 0, sizeof(part));

        /* First check if the interface is running */
        (void)strcpy(ifr.ifr_name, interface);
        if (ioctl(general_socket, SIOCGIFFLAGS, &ifr) < 0 ||
            !(ifr.ifr_flags & IFF_RUNNING))
                return NULL;

        /* Interface is up, get the IP address */
        (void)strcpy(ifr.ifr_name, interface);
        ifr.ifr_addr.sa_family = AF_INET;
        if (ioctl(general_socket, SIOCGIFADDR, &ifr) < 0)
                return "no IP";

        memcpy(&addr, &ifr.ifr_addr, len);
        (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, len);
        if (strlen(part) == 0)
                (void)snprintf(part, sizeof(part), "no IP");

        return part;
}

/*
 * Just parses /proc/net/wireless looking for lines beginning with
 * wlan_interface, extracting the quality of the link and adding the
 * current IP address of wlan_interface.
 *
 */
static char *get_wireless_info() {
        char buf[1024];
        static char part[512];
        char *interfaces;
        int fd;
        memset(buf, 0, sizeof(buf));
        memset(part, 0, sizeof(part));

        if ((fd = open("/proc/net/wireless", O_RDONLY)) == -1)
                die("Could not open /proc/net/wireless\n");
        (void)read(fd, buf, sizeof(buf));
        (void)close(fd);

        interfaces = skip_character(buf, '\n', 1) + 1;
        while ((interfaces = skip_character(interfaces, '\n', 1)+1) < buf+strlen(buf)) {
                while (isspace((int)*interfaces))
                        interfaces++;
                if (!BEGINS_WITH(interfaces, wlan_interface))
                        continue;
                int quality;
                if (sscanf(interfaces, "%*[^:]: 0000 %d", &quality) != 1)
                        continue;
                if ((quality == UCHAR_MAX) || (quality == 0)) {
                        if (use_colors)
                                (void)snprintf(part, sizeof(part), "%sW: down", color("#FF0000"));
                        else (void)snprintf(part, sizeof(part), "W: down");
                } else (void)snprintf(part, sizeof(part), "%sW: (%03d%%) %s",
                                color("#00FF00"), quality, get_ip_address(wlan_interface));
                return part;
        }

        return part;
}

/*
 * Combines ethernet IP addresses and speed (if requested) for displaying
 *
 */
static char *get_eth_info() {
        static char part[512];
        const char *ip_address = get_ip_address(eth_interface);
        int ethspeed = 0;

        if (get_ethspeed) {
#ifdef LINUX
                /* This code path requires root privileges */
                struct ifreq ifr;
                struct ethtool_cmd ecmd;

                ecmd.cmd = ETHTOOL_GSET;
                (void)memset(&ifr, 0, sizeof(ifr));
                ifr.ifr_data = (caddr_t)&ecmd;
                (void)strcpy(ifr.ifr_name, eth_interface);
                if (ioctl(general_socket, SIOCETHTOOL, &ifr) == 0)
                        ethspeed = (ecmd.speed == USHRT_MAX ? 0 : ecmd.speed);
                else get_ethspeed = false;
#endif
        }

        if (ip_address == NULL)
                (void)snprintf(part, sizeof(part), "E: down");
        else {
                if (get_ethspeed)
                        (void)snprintf(part, sizeof(part), "E: %s (%d Mbit/s)", ip_address, ethspeed);
                else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
        }

        return part;
}

/*
 * Reads the CPU temperature from /sys/class/thermal/thermal_zone0/temp and
 * returns the temperature in degree celcius.
 *
 */
static char *get_cpu_temperature_info() {
        static char part[16];
        char buf[16];
        int temp;
        int fd;

        memset(buf, 0, sizeof(buf));
        memset(part, 0, sizeof(part));

        if ((fd = open(thermal_zone, O_RDONLY)) == -1)
                die("Could not open %s\n", thermal_zone);
        (void)read(fd, buf, sizeof(buf));
        (void)close(fd);

        if (sscanf(buf, "%d", &temp) != 1)
                (void)snprintf(part, sizeof(part), "T: ? C");
        else
                (void)snprintf(part, sizeof(part), "T: %d C", (temp/1000));

        return part;
}

/*
 * Checks if the PID in path is still valid by checking:
 *  (Linux) if /proc/<pid> exists
 *  (NetBSD) if sysctl returns process infos for this pid
 *
 */
static bool process_runs(const char *path) {
        char pidbuf[16];
        static glob_t globbuf;
        int fd;
        memset(pidbuf, 0, sizeof(pidbuf));

        if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
                die("glob() failed\n");
        fd = open((globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path), O_RDONLY);
        globfree(&globbuf);
        if (fd < 0)
                return false;
        (void)read(fd, pidbuf, sizeof(pidbuf));
        (void)close(fd);

#ifdef LINUX
        struct stat statbuf;
        char procbuf[512];
        (void)snprintf(procbuf, sizeof(procbuf), "/proc/%ld", strtol(pidbuf, NULL, 10));
        return (stat(procbuf, &statbuf) >= 0);
#else
        /* TODO: correctly check for NetBSD. Evaluate if this runs on OpenBSD/FreeBSD */
        struct kinfo_proc info;
        size_t length = sizeof(struct kinfo_proc);
        int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, strtol(pidbuf, NULL, 10) };
        if (sysctl(mib, 4, &info, &length, NULL, 0) < 0)
                return false;
        return (length != 0);
#endif
}

/*
 * Reads the configuration from the given file
 *
 */
static int load_configuration(const char *configfile) {
        #define OPT(x) else if (strcasecmp(dest_name, x) == 0)

        /* check if the file exists */
        struct stat buf;
        if (stat(configfile, &buf) < 0)
                return -1;

        int result = 0;
        FILE *handle = fopen(configfile, "r");
        if (handle == NULL)
                die("Could not open configfile\n");
        char dest_name[512], dest_value[512], whole_buffer[1026];

        while (!feof(handle)) {
                char *ret;
                if ((ret = fgets(whole_buffer, 1024, handle)) == whole_buffer) {
                        /* sscanf implicitly strips whitespace */
                        if (sscanf(whole_buffer, "%s %[^\n]", dest_name, dest_value) < 1)
                                continue;
                } else if (ret != NULL)
                        die("Could not read line in configuration file\n");

                /* skip comments and empty lines */
                if (dest_name[0] == '#' || strlen(dest_name) < 3)
                        continue;

                OPT("wlan")
                        wlan_interface = strdup(dest_value);
                OPT("eth")
                        eth_interface = strdup(dest_value);
                OPT("time_format")
                        time_format = strdup(dest_value);
                OPT("battery") {
                        struct battery *new = calloc(1, sizeof(struct battery));
                        if (new == NULL)
                                die("Could not allocate memory\n");
                        if (asprintf(&(new->path), "/sys/class/power_supply/BAT%d/uevent", atoi(dest_value)) == -1)
                                die("Could not build battery path\n");

                        /* check if flags were specified for this battery */
                        if (strstr(dest_value, ",") != NULL) {
                                char *flags = strstr(dest_value, ",");
                                flags++;
                                if (*flags == 'f')
                                        new->use_last_full = true;
                        }
                        SIMPLEQ_INSERT_TAIL(&batteries, new, batteries);
                } OPT("color")
                        use_colors = true;
                OPT("get_ethspeed")
                        get_ethspeed = true;
                OPT("get_cpu_temperature") {
                        get_cpu_temperature = true;
                        if (strlen(dest_value) > 0) {
                                if (asprintf(&thermal_zone, "/sys/class/thermal/thermal_zone%d/temp", atoi(dest_value)) == -1)
                                        die("Could not build thermal_zone path\n");
                        } else {
                                 if (asprintf(&thermal_zone, "/sys/class/thermal/thermal_zone0/temp") == -1)
                                        die("Could not build thermal_zone path\n");
                        }
                } OPT("normcolors")
                        wmii_normcolors = strdup(dest_value);
                OPT("interval")
                        interval = atoi(dest_value);
                OPT("wmii_path")
                {
#ifndef DZEN
                        static glob_t globbuf;
                        struct stat stbuf;
                        if (glob(dest_value, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
                                die("glob() failed\n");
                        wmii_path = strdup(globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : dest_value);
                        globfree(&globbuf);

                        if ((stat(wmii_path, &stbuf)) == -1) {
                                fprintf(stderr, "Warning: wmii_path contains an invalid path\n");
                                free(wmii_path);
                                wmii_path = strdup(dest_value);
                        }
                        if (wmii_path[strlen(wmii_path)-1] != '/')
                                die("wmii_path is not terminated by /\n");
#endif
                }
                OPT("run_watch")
                {
                        char *name = strdup(dest_value);
                        char *path = name;
                        while (*path != ' ')
                                path++;
                        *(path++) = '\0';
                        num_run_watches += 2;
                        run_watches = realloc(run_watches, sizeof(char*) * num_run_watches);
                        run_watches[num_run_watches-2] = name;
                        run_watches[num_run_watches-1] = path;
                }
                OPT("order")
                {
                        #define SET_ORDER(opt, idx) { if (strcasecmp(token, opt) == 0) sprintf(order[idx], "%d", c++); }
                        char *walk, *token;
                        int c = 0;
                        walk = token = dest_value;
                        while (*walk != '\0') {
                                while ((*walk != ',') && (*walk != '\0'))
                                        walk++;
                                *(walk++) = '\0';
                                SET_ORDER("run", ORDER_RUN);
                                SET_ORDER("wlan", ORDER_WLAN);
                                SET_ORDER("eth", ORDER_ETH);
                                SET_ORDER("battery", ORDER_BATTERY);
                                SET_ORDER("cpu_temperature", ORDER_CPU_TEMPERATURE);
                                SET_ORDER("load", ORDER_LOAD);
                                SET_ORDER("time", ORDER_TIME);
                                token = walk;
                                while (isspace((int)(*token)))
                                        token++;
                        }
                }
                else
                {
                        result = -2;
                        die("Unknown configfile option: %s\n", dest_name);
                }
        }
        fclose(handle);

#ifndef DZEN
        if (wmii_path == NULL)
                exit(EXIT_FAILURE);
#endif

        return result;
}

/*
 * Exit upon SIGPIPE because when we have nowhere to write to, gathering
 * system information is pointless.
 *
 */
void sigpipe(int signum) {
        fprintf(stderr, "Received SIGPIPE, exiting\n");
        exit(1);
}

int main(int argc, char *argv[]) {
        char part[512],
             pathbuf[512];
        unsigned int i;

        char *configfile = PREFIX "/etc/i3status.conf";
        int o, option_index = 0;
        struct option long_options[] = {
                {"config", required_argument, 0, 'c'},
                {"help", no_argument, 0, 'h'},
                {0, 0, 0, 0}
        };

        struct sigaction action;
        memset(&action, 0, sizeof(struct sigaction));
        action.sa_handler = sigpipe;
        sigaction(SIGPIPE, &action, NULL);

        SIMPLEQ_INIT(&batteries);

        while ((o = getopt_long(argc, argv, "c:h", long_options, &option_index)) != -1)
                if ((char)o == 'c')
                        configfile = optarg;
                else if ((char)o == 'h') {
                        printf("i3status (c) 2008-2009 Michael Stapelberg\n"
                                "Syntax: %s [-c <configfile>]\n", argv[0]);
                        return 0;
                }

        if (load_configuration(configfile) < 0)
                return EXIT_FAILURE;

        setup();

        if ((general_socket = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
                die("Could not create socket\n");

        while (1) {
                for (i = 0; i < num_run_watches; i += 2) {
                        bool running = process_runs(run_watches[i+1]);
                        if (use_colors)
                                snprintf(part, sizeof(part), "%s%s: %s",
                                        (running ? color("#00FF00") : color("#FF0000")),
                                        run_watches[i],
                                        (running ? "yes" : "no"));
                        else snprintf(part, sizeof(part), "%s: %s", run_watches[i], (running ? "yes" : "no"));
                        snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
                        write_to_statusbar(pathbuf, part, false);
                }

                if (wlan_interface)
                        write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info(), false);
                if (eth_interface)
                        write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info(), false);
                struct battery *current_battery;
                SIMPLEQ_FOREACH(current_battery, &batteries, batteries) {
                        write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info(current_battery), false);
                }
                if (get_cpu_temperature)
                        write_to_statusbar(concat(order[ORDER_CPU_TEMPERATURE], "cpu_temperature"), get_cpu_temperature_info(), false);

                /* Get load */
#ifdef LINUX
                int load_avg;
                if ((load_avg = open("/proc/loadavg", O_RDONLY)) == -1)
                        die("Could not open /proc/loadavg\n");
                (void)read(load_avg, part, sizeof(part));
                (void)close(load_avg);
                *skip_character(part, ' ', 3) = '\0';
#else
                /* TODO: correctly check for NetBSD, check if it works the same on *BSD */
                struct loadavg load;
                size_t length = sizeof(struct loadavg);
                int mib[2] = { CTL_VM, VM_LOADAVG };
                if (sysctl(mib, 2, &load, &length, NULL, 0) < 0)
                        die("Could not sysctl({ CTL_VM, VM_LOADAVG })\n");
                double scale = load.fscale;
                (void)snprintf(part, sizeof(part), "%.02f %.02f %.02f",
                                (double)load.ldavg[0] / scale,
                                (double)load.ldavg[1] / scale,
                                (double)load.ldavg[2] / scale);
#endif
                write_to_statusbar(concat(order[ORDER_LOAD], "load"), part, !time_format);

                if (time_format) {
                        /* Get date & time */
                        time_t current_time = time(NULL);
                        struct tm *current_tm = localtime(&current_time);
                        (void)strftime(part, sizeof(part), time_format, current_tm);
                        write_to_statusbar(concat(order[ORDER_TIME], "time"), part, true);
                }

                sleep(interval);
        }
}