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i3status.c
618 lines (532 loc) · 24.2 KB
/
i3status.c
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/*
* vim:ts=8:expandtab
*
* i3status – Generates a status line for dzen2 or xmobar
*
* Copyright © 2014 Griffin Smith <wildgriffin45 at gmail dot com>
* Copyright © 2008-2012 Michael Stapelberg and contributors
* Copyright © 2009 Thorsten Toepper <atsutane at freethoughts dot de>
* Copyright © 2010 Axel Wagner <mail at merovius dot de>
* Copyright © 2010 Fernando Tarlá Cardoso Lemos <fernandotcl at gmail dot com>
*
* See file LICENSE for license information.
*
*/
#include <string.h>
#include <stdio.h>
#include <stdbool.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <getopt.h>
#include <signal.h>
#include <confuse.h>
#include <glob.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <sys/time.h>
#include <locale.h>
#include <yajl/yajl_gen.h>
#include <yajl/yajl_version.h>
#include <libnotify/notify.h>
#include "i3status.h"
#define exit_if_null(pointer, ...) { if (pointer == NULL) die(__VA_ARGS__); }
#define CFG_COLOR_OPTS(good, degraded, bad) \
CFG_STR("color_good", good, CFGF_NONE), \
CFG_STR("color_degraded", degraded, CFGF_NONE), \
CFG_STR("color_bad", bad, CFGF_NONE)
#define CFG_CUSTOM_COLOR_OPTS CFG_COLOR_OPTS(NULL, NULL, NULL)
/* socket file descriptor for general purposes */
int general_socket;
static bool exit_upon_signal = false;
cfg_t *cfg, *cfg_general, *cfg_section;
/*
* Set the exit_upon_signal flag, because one cannot do anything in a safe
* manner in a signal handler (e.g. fprintf, which we really want to do for
* debugging purposes), see
* https://www.securecoding.cert.org/confluence/display/seccode/SIG30-C.+Call+only+asynchronous-safe+functions+within+signal+handlers
*
*/
void fatalsig(int signum) {
exit_upon_signal = true;
}
/*
* Do nothing upon SIGUSR1. Running this signal handler will nevertheless
* interrupt nanosleep() so that i3status immediately generates new output.
*
*/
void sigusr1(int signum) {
}
/*
* Checks if the given path exists by calling stat().
*
*/
static bool path_exists(const char *path) {
struct stat buf;
return (stat(path, &buf) == 0);
}
static void *scalloc(size_t size) {
void *result = calloc(size, 1);
exit_if_null(result, "Error: out of memory (calloc(%zd))\n", size);
return result;
}
static char *sstrdup(const char *str) {
char *result = strdup(str);
exit_if_null(result, "Error: out of memory (strdup())\n");
return result;
}
/*
* Validates a color in "#RRGGBB" format
*
*/
static int valid_color(const char *value)
{
if (strlen(value) != 7) return 0;
if (value[0] != '#') return 0;
for (int i = 1; i < 7; ++i) {
if (value[i] >= '0' && value[i] <= '9') continue;
if (value[i] >= 'a' && value[i] <= 'f') continue;
if (value[i] >= 'A' && value[i] <= 'F') continue;
return 0;
}
return 1;
}
/*
* This function resolves ~ in pathnames.
* It may resolve wildcards in the first part of the path, but if no match
* or multiple matches are found, it just returns a copy of path as given.
*
*/
static char *resolve_tilde(const char *path) {
static glob_t globbuf;
char *head, *tail, *result = NULL;
tail = strchr(path, '/');
head = strndup(path, tail ? (size_t)(tail - path) : strlen(path));
int res = glob(head, GLOB_TILDE, NULL, &globbuf);
free(head);
/* no match, or many wildcard matches are bad */
if (res == GLOB_NOMATCH || globbuf.gl_pathc != 1)
result = sstrdup(path);
else if (res != 0) {
die("glob() failed");
} else {
head = globbuf.gl_pathv[0];
result = scalloc(strlen(head) + (tail ? strlen(tail) : 0) + 1);
strncpy(result, head, strlen(head));
if (tail)
strncat(result, tail, strlen(tail));
}
globfree(&globbuf);
return result;
}
static char *get_config_path(void) {
char *xdg_config_home, *xdg_config_dirs, *config_path;
/* 1: check the traditional path under the home directory */
config_path = resolve_tilde("~/.i3status.conf");
if (path_exists(config_path))
return config_path;
/* 2: check for $XDG_CONFIG_HOME/i3status/config */
if ((xdg_config_home = getenv("XDG_CONFIG_HOME")) == NULL)
xdg_config_home = "~/.config";
xdg_config_home = resolve_tilde(xdg_config_home);
if (asprintf(&config_path, "%s/i3status/config", xdg_config_home) == -1)
die("asprintf() failed");
free(xdg_config_home);
if (path_exists(config_path))
return config_path;
free(config_path);
/* 3: check the traditional path under /etc */
config_path = SYSCONFDIR "/i3status.conf";
if (path_exists(config_path))
return sstrdup(config_path);
/* 4: check for $XDG_CONFIG_DIRS/i3status/config */
if ((xdg_config_dirs = getenv("XDG_CONFIG_DIRS")) == NULL)
xdg_config_dirs = "/etc/xdg";
char *buf = strdup(xdg_config_dirs);
char *tok = strtok(buf, ":");
while (tok != NULL) {
tok = resolve_tilde(tok);
if (asprintf(&config_path, "%s/i3status/config", tok) == -1)
die("asprintf() failed");
free(tok);
if (path_exists(config_path)) {
free(buf);
return config_path;
}
free(config_path);
tok = strtok(NULL, ":");
}
free(buf);
die("Unable to find the configuration file (looked at "
"~/.i3status.conf, $XDG_CONFIG_HOME/i3status/config, "
"/etc/i3status.conf and $XDG_CONFIG_DIRS/i3status/config)");
return NULL;
}
int main(int argc, char *argv[]) {
unsigned int j;
cfg_opt_t general_opts[] = {
CFG_STR("output_format", "auto", CFGF_NONE),
CFG_BOOL("colors", 1, CFGF_NONE),
CFG_STR("color_separator", "#333333", CFGF_NONE),
CFG_INT("interval", 1, CFGF_NONE),
CFG_COLOR_OPTS("#00FF00", "#FFFF00", "#FF0000"),
CFG_END()
};
cfg_opt_t mpd_opts[] = {
CFG_STR("format", "auto", CFGF_NONE),
CFG_STR("format_stopped", "Stopped", CFGF_NONE),
CFG_STR("notif_header_format", "%title", CFGF_NONE),
CFG_STR("notif_body_format", "%artist - %album", CFGF_NONE),
CFG_END()
};
cfg_opt_t run_watch_opts[] = {
CFG_STR("pidfile", NULL, CFGF_NONE),
CFG_STR("format", "%title: %status", CFGF_NONE),
CFG_CUSTOM_COLOR_OPTS,
CFG_END()
};
cfg_opt_t path_exists_opts[] = {
CFG_STR("path", NULL, CFGF_NONE),
CFG_STR("format", "%title: %status", CFGF_NONE),
CFG_CUSTOM_COLOR_OPTS,
CFG_END()
};
cfg_opt_t wireless_opts[] = {
CFG_STR("format_up", "W: (%quality at %essid, %bitrate) %ip", CFGF_NONE),
CFG_STR("format_down", "W: down", CFGF_NONE),
CFG_CUSTOM_COLOR_OPTS,
CFG_END()
};
cfg_opt_t ethernet_opts[] = {
CFG_STR("format_up", "E: %ip (%speed)", CFGF_NONE),
CFG_STR("format_down", "E: down", CFGF_NONE),
CFG_CUSTOM_COLOR_OPTS,
CFG_END()
};
cfg_opt_t ipv6_opts[] = {
CFG_STR("format_up", "%ip", CFGF_NONE),
CFG_STR("format_down", "no IPv6", CFGF_NONE),
CFG_CUSTOM_COLOR_OPTS,
CFG_END()
};
cfg_opt_t battery_opts[] = {
CFG_STR("format", "%status %percentage %remaining", CFGF_NONE),
CFG_STR("format_down", "No battery", CFGF_NONE),
CFG_STR("notif_header_format", "Battery: %status", CFGF_NONE),
CFG_STR("notif_body_format", "%percentage, %remaining remaining", CFGF_NONE),
CFG_STR("path", "/sys/class/power_supply/BAT%d/uevent", CFGF_NONE),
CFG_INT("low_threshold", 30, CFGF_NONE),
CFG_INT("critical_threshold", 10, CFGF_NONE),
CFG_STR("threshold_type", "time", CFGF_NONE),
CFG_BOOL("last_full_capacity", false, CFGF_NONE),
CFG_BOOL("integer_battery_capacity", false, CFGF_NONE),
CFG_CUSTOM_COLOR_OPTS,
CFG_END()
};
cfg_opt_t time_opts[] = {
CFG_STR("format", "%Y-%m-%d %H:%M:%S", CFGF_NONE),
CFG_END()
};
cfg_opt_t tztime_opts[] = {
CFG_STR("format", "%Y-%m-%d %H:%M:%S %Z", CFGF_NONE),
CFG_STR("timezone", "", CFGF_NONE),
CFG_END()
};
cfg_opt_t ddate_opts[] = {
CFG_STR("format", "%{%a, %b %d%}, %Y%N - %H", CFGF_NONE),
CFG_END()
};
cfg_opt_t load_opts[] = {
CFG_STR("format", "%1min %5min %15min", CFGF_NONE),
CFG_FLOAT("max_threshold", 5, CFGF_NONE),
CFG_CUSTOM_COLOR_OPTS,
CFG_END()
};
cfg_opt_t usage_opts[] = {
CFG_STR("format", "%usage", CFGF_NONE),
CFG_END()
};
cfg_opt_t temp_opts[] = {
CFG_STR("format", "%degrees C", CFGF_NONE),
CFG_STR("path", NULL, CFGF_NONE),
CFG_INT("max_threshold", 75, CFGF_NONE),
CFG_CUSTOM_COLOR_OPTS,
CFG_END()
};
cfg_opt_t disk_opts[] = {
CFG_STR("format", "%free", CFGF_NONE),
CFG_STR("prefix_type", "binary", CFGF_NONE),
CFG_END()
};
cfg_opt_t volume_opts[] = {
CFG_STR("format", "♪: %volume", CFGF_NONE),
CFG_STR("format_muted", "♪: 0%%", CFGF_NONE),
CFG_STR("device", "default", CFGF_NONE),
CFG_STR("mixer", "Master", CFGF_NONE),
CFG_INT("mixer_idx", 0, CFGF_NONE),
CFG_CUSTOM_COLOR_OPTS,
CFG_END()
};
cfg_opt_t opts[] = {
CFG_STR_LIST("order", "{}", CFGF_NONE),
CFG_SEC("general", general_opts, CFGF_NONE),
CFG_SEC("mpd", mpd_opts, CFGF_NONE),
CFG_SEC("run_watch", run_watch_opts, CFGF_TITLE | CFGF_MULTI),
CFG_SEC("path_exists", path_exists_opts, CFGF_TITLE | CFGF_MULTI),
CFG_SEC("wireless", wireless_opts, CFGF_TITLE | CFGF_MULTI),
CFG_SEC("ethernet", ethernet_opts, CFGF_TITLE | CFGF_MULTI),
CFG_SEC("battery", battery_opts, CFGF_TITLE | CFGF_MULTI),
CFG_SEC("cpu_temperature", temp_opts, CFGF_TITLE | CFGF_MULTI),
CFG_SEC("disk", disk_opts, CFGF_TITLE | CFGF_MULTI),
CFG_SEC("volume", volume_opts, CFGF_TITLE | CFGF_MULTI),
CFG_SEC("ipv6", ipv6_opts, CFGF_NONE),
CFG_SEC("time", time_opts, CFGF_NONE),
CFG_SEC("tztime", tztime_opts, CFGF_TITLE | CFGF_MULTI),
CFG_SEC("ddate", ddate_opts, CFGF_NONE),
CFG_SEC("load", load_opts, CFGF_NONE),
CFG_SEC("cpu_usage", usage_opts, CFGF_NONE),
CFG_CUSTOM_COLOR_OPTS,
CFG_END()
};
char *configfile = NULL;
int o, option_index = 0;
struct option long_options[] = {
{"config", required_argument, 0, 'c'},
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'v'},
{0, 0, 0, 0}
};
struct sigaction action;
memset(&action, 0, sizeof(struct sigaction));
action.sa_handler = fatalsig;
/* Exit upon SIGPIPE because when we have nowhere to write to, gathering system
* information is pointless. Also exit explicitly on SIGTERM and SIGINT because
* only this will trigger a reset of the cursor in the terminal output-format.
*/
sigaction(SIGPIPE, &action, NULL);
sigaction(SIGTERM, &action, NULL);
sigaction(SIGINT, &action, NULL);
memset(&action, 0, sizeof(struct sigaction));
action.sa_handler = sigusr1;
sigaction(SIGUSR1, &action, NULL);
if (setlocale(LC_ALL, "") == NULL)
die("Could not set locale. Please make sure all your LC_* / LANG settings are correct.");
while ((o = getopt_long(argc, argv, "c:hv", long_options, &option_index)) != -1)
if ((char)o == 'c')
configfile = optarg;
else if ((char)o == 'h') {
printf("i3status " VERSION " © 2008-2012 Michael Stapelberg and contributors\n"
"Syntax: %s [-c <configfile>] [-h] [-v]\n", argv[0]);
return 0;
} else if ((char)o == 'v') {
printf("i3status " VERSION " © 2008-2012 Michael Stapelberg and contributors\n");
return 0;
}
if (configfile == NULL)
configfile = get_config_path();
cfg = cfg_init(opts, CFGF_NOCASE);
if (cfg_parse(cfg, configfile) == CFG_PARSE_ERROR)
return EXIT_FAILURE;
if (cfg_size(cfg, "order") == 0)
die("Your 'order' array is empty. Please fix your config.\n");
cfg_general = cfg_getsec(cfg, "general");
if (cfg_general == NULL)
die("Could not get section \"general\"\n");
char *output_str = cfg_getstr(cfg_general, "output_format");
if (strcasecmp(output_str, "auto") == 0) {
fprintf(stderr, "i3status: trying to auto-detect output_format setting\n");
output_str = auto_detect_format();
if (!output_str) {
output_str = "none";
fprintf(stderr, "i3status: falling back to \"none\"\n");
} else {
fprintf(stderr, "i3status: auto-detected \"%s\"\n", output_str);
}
}
if (strcasecmp(output_str, "dzen2") == 0)
output_format = O_DZEN2;
else if (strcasecmp(output_str, "xmobar") == 0)
output_format = O_XMOBAR;
else if (strcasecmp(output_str, "i3bar") == 0)
output_format = O_I3BAR;
else if (strcasecmp(output_str, "term") == 0)
output_format = O_TERM;
else if (strcasecmp(output_str, "none") == 0)
output_format = O_NONE;
else die("Unknown output format: \"%s\"\n", output_str);
if (!valid_color(cfg_getstr(cfg_general, "color_good"))
|| !valid_color(cfg_getstr(cfg_general, "color_degraded"))
|| !valid_color(cfg_getstr(cfg_general, "color_bad"))
|| !valid_color(cfg_getstr(cfg_general, "color_separator")))
die("Bad color format");
#if YAJL_MAJOR >= 2
yajl_gen json_gen = yajl_gen_alloc(NULL);
#else
yajl_gen json_gen = yajl_gen_alloc(NULL, NULL);
#endif
if (output_format == O_I3BAR) {
/* Initialize the i3bar protocol. See i3/docs/i3bar-protocol
* for details. */
printf("{\"version\":1}\n[\n");
fflush(stdout);
yajl_gen_array_open(json_gen);
yajl_gen_clear(json_gen);
}
if (output_format == O_TERM) {
/* Save the cursor-position and hide the cursor */
printf("\033[s\033[?25l");
/* Undo at exit */
atexit(&reset_cursor);
}
if ((general_socket = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
die("Could not create socket\n");
// Initialize libnotify
notify_init("i3status");
int interval = cfg_getint(cfg_general, "interval");
/* One memory page which each plugin can use to buffer output.
* Even though it’s unclean, we just assume that the user will not
* specify a format string which expands to something longer than 4096
* bytes — given that the output of i3status is used to display
* information on screen, more than 1024 characters for the full line
* (!), not individual plugins, seem very unlikely. */
char buffer[4096];
while (1) {
if (exit_upon_signal) {
fprintf(stderr, "Exiting due to signal.\n");
cleanup_mpd();
notify_uninit();
exit(1);
}
struct timeval tv;
gettimeofday(&tv, NULL);
if (output_format == O_I3BAR)
yajl_gen_array_open(json_gen);
else if (output_format == O_TERM)
/* Restore the cursor-position, clear line */
printf("\033[u\033[K");
for (j = 0; j < cfg_size(cfg, "order"); j++) {
if (j > 0)
print_seperator();
const char *current = cfg_getnstr(cfg, "order", j);
CASE_SEC("mpd") {
SEC_OPEN_MAP("mpd");
print_mpd(json_gen, buffer,
cfg_getstr(sec, "format"),
cfg_getstr(sec, "format_stopped"),
cfg_getstr(sec, "notif_header_format"),
cfg_getstr(sec, "notif_body_format"));
SEC_CLOSE_MAP;
}
CASE_SEC("ipv6") {
SEC_OPEN_MAP("ipv6");
print_ipv6_info(json_gen, buffer, cfg_getstr(sec, "format_up"), cfg_getstr(sec, "format_down"));
SEC_CLOSE_MAP;
}
CASE_SEC_TITLE("wireless") {
SEC_OPEN_MAP("wireless");
print_wireless_info(json_gen, buffer, title, cfg_getstr(sec, "format_up"), cfg_getstr(sec, "format_down"));
SEC_CLOSE_MAP;
}
CASE_SEC_TITLE("ethernet") {
SEC_OPEN_MAP("ethernet");
print_eth_info(json_gen, buffer, title, cfg_getstr(sec, "format_up"), cfg_getstr(sec, "format_down"));
SEC_CLOSE_MAP;
}
CASE_SEC_TITLE("battery") {
SEC_OPEN_MAP("battery");
print_battery_info(json_gen, buffer, atoi(title),
cfg_getstr(sec, "path"),
cfg_getstr(sec, "format"),
cfg_getstr(sec, "format_down"),
cfg_getstr(sec, "notif_header_format"),
cfg_getstr(sec, "notif_body_format"),
cfg_getint(sec, "low_threshold"),
cfg_getstr(sec, "threshold_type"),
cfg_getbool(sec, "last_full_capacity"),
cfg_getbool(sec, "integer_battery_capacity"));
SEC_CLOSE_MAP;
}
CASE_SEC_TITLE("run_watch") {
SEC_OPEN_MAP("run_watch");
print_run_watch(json_gen, buffer, title, cfg_getstr(sec, "pidfile"), cfg_getstr(sec, "format"));
SEC_CLOSE_MAP;
}
CASE_SEC_TITLE("path_exists") {
SEC_OPEN_MAP("path_exists");
print_path_exists(json_gen, buffer, title, cfg_getstr(sec, "path"), cfg_getstr(sec, "format"));
SEC_CLOSE_MAP;
}
CASE_SEC_TITLE("disk") {
SEC_OPEN_MAP("disk_info");
print_disk_info(json_gen, buffer, title, cfg_getstr(sec, "format"), cfg_getstr(sec, "prefix_type"));
SEC_CLOSE_MAP;
}
CASE_SEC("load") {
SEC_OPEN_MAP("load");
print_load(json_gen, buffer, cfg_getstr(sec, "format"), cfg_getfloat(sec, "max_threshold"));
SEC_CLOSE_MAP;
}
CASE_SEC("time") {
SEC_OPEN_MAP("time");
print_time(json_gen, buffer, cfg_getstr(sec, "format"), NULL, tv.tv_sec);
SEC_CLOSE_MAP;
}
CASE_SEC_TITLE("tztime") {
SEC_OPEN_MAP("tztime");
print_time(json_gen, buffer, cfg_getstr(sec, "format"), cfg_getstr(sec, "timezone"), tv.tv_sec);
SEC_CLOSE_MAP;
}
CASE_SEC("ddate") {
SEC_OPEN_MAP("ddate");
print_ddate(json_gen, buffer, cfg_getstr(sec, "format"), tv.tv_sec);
SEC_CLOSE_MAP;
}
CASE_SEC_TITLE("volume") {
SEC_OPEN_MAP("volume");
print_volume(json_gen, buffer, cfg_getstr(sec, "format"),
cfg_getstr(sec, "format_muted"),
cfg_getstr(sec, "device"),
cfg_getstr(sec, "mixer"),
cfg_getint(sec, "mixer_idx"));
SEC_CLOSE_MAP;
}
CASE_SEC_TITLE("cpu_temperature") {
SEC_OPEN_MAP("cpu_temperature");
print_cpu_temperature_info(json_gen, buffer, atoi(title), cfg_getstr(sec, "path"), cfg_getstr(sec, "format"), cfg_getint(sec, "max_threshold"));
SEC_CLOSE_MAP;
}
CASE_SEC("cpu_usage") {
SEC_OPEN_MAP("cpu_usage");
print_cpu_usage(json_gen, buffer, cfg_getstr(sec, "format"));
SEC_CLOSE_MAP;
}
}
if (output_format == O_I3BAR) {
yajl_gen_array_close(json_gen);
const unsigned char *buf;
#if YAJL_MAJOR >= 2
size_t len;
#else
unsigned int len;
#endif
yajl_gen_get_buf(json_gen, &buf, &len);
write(STDOUT_FILENO, buf, len);
yajl_gen_clear(json_gen);
}
printf("\n");
fflush(stdout);
/* To provide updates on every full second (as good as possible)
* we don’t use sleep(interval) but we sleep until the next
* second (with microsecond precision) plus (interval-1)
* seconds. We also align to 60 seconds modulo interval such
* that we start with :00 on every new minute. */
struct timeval current_timeval;
gettimeofday(¤t_timeval, NULL);
struct timespec ts = {interval - 1 - (current_timeval.tv_sec % interval), (10e5 - current_timeval.tv_usec) * 1000};
nanosleep(&ts, NULL);
}
cleanup_mpd();
notify_uninit();
}