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