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deedaed1f95cd3d5d7b980817ffa5abd2c10c495
weechat/src/core/weechat.c
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Sébastien Helleu deedaed1f9 core: auto-detect terminal background and apply light theme on first start 
Detect the terminal background (via COLORFGBG or an OSC 11 query) before
GUI init and, on the first start, automatically apply the built-in
"light" theme when a light terminal is detected.

The function gui_term_theme_is_light returns an int (1 if light, 0 otherwise,
0 being the safe value when detection is unsure).
2026-06-08 09:39:22 +02:00

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/*
* ##########################################################################
* ## ___ __ ______________ _____ ##
* ## __ | / /___________ ____/__ /_______ __ /_ ##
* ## __ | /| / /_ _ \ _ \ / __ __ \ __ `/ __/ ##
* ## __ |/ |/ / / __/ __/ /___ _ / / / /_/ // /_ ##
* ## ____/|__/ \___/\___/\____/ /_/ /_/\__,_/ \__/ ##
* ## ##
* ## WeeChat - Wee Enhanced Environment for Chat ##
* ## Fast, light, extensible chat client ##
* ## ##
* ## By Sébastien Helleu <flashcode@flashtux.org> ##
* ## ##
* ## https://weechat.org/ ##
* ## ##
* ##########################################################################
*
* SPDX-FileCopyrightText: 2003-2026 Sébastien Helleu <flashcode@flashtux.org>
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
* This file is part of WeeChat, the extensible chat client.
*
* WeeChat is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* WeeChat is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with WeeChat. If not, see <https://www.gnu.org/licenses/>.
*/
/* WeeChat main functions */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <signal.h>
#ifdef HAVE_LANGINFO_CODESET
#include <langinfo.h>
#endif
#include "weechat.h"
#include "core-args.h"
#include "core-command.h"
#include "core-completion.h"
#include "core-config.h"
#include "core-debug.h"
#include "core-dir.h"
#include "core-doc.h"
#include "core-eval.h"
#include "core-hdata.h"
#include "core-hook.h"
#include "core-list.h"
#include "core-log.h"
#include "core-network.h"
#include "core-proxy.h"
#include "core-secure.h"
#include "core-secure-config.h"
#include "core-signal.h"
#include "core-string.h"
#include "core-theme.h"
#include "core-upgrade.h"
#include "core-url.h"
#include "core-utf8.h"
#include "core-util.h"
#include "../gui/gui-chat.h"
#include "../gui/gui-color.h"
#include "../gui/gui-completion.h"
#include "../gui/gui-focus.h"
#include "../gui/gui-key.h"
#include "../gui/gui-layout.h"
#include "../gui/gui-main.h"
#include "../plugins/plugin.h"
#include "../plugins/plugin-api.h"
int weechat_headless = 0; /* 1 if running headless (no GUI) */
int weechat_daemon = 0; /* 1 if daemonized (no foreground) */
int weechat_log_stdout = 0; /* 1 to log messages on stdout */
int weechat_debug_core = 0; /* debug level for core */
char *weechat_argv0 = NULL; /* WeeChat binary file name (argv[0])*/
int weechat_upgrading = 0; /* =1 if WeeChat is upgrading */
int weechat_first_start = 0; /* first start of WeeChat? */
time_t weechat_first_start_time = 0; /* start time (used by /uptime cmd) */
int weechat_term_theme_light = 0; /* 1 if light theme detected */
int weechat_upgrade_count = 0; /* number of /upgrade done */
struct timeval weechat_current_start_timeval; /* start time used to display */
/* duration of /upgrade */
int weechat_quit = 0; /* = 1 if quit request from user */
volatile sig_atomic_t weechat_quit_signal = 0; /* signal received, */
/* WeeChat must quit */
volatile sig_atomic_t weechat_reload_signal = 0; /* signal received, */
/* WeeChat must reload configuration */
char *weechat_home_force = NULL; /* forced home (with -d/--dir) */
int weechat_home_temp = 0; /* 1 if using a temporary home */
int weechat_home_delete_on_exit = 0; /* 1 if home is deleted on exit */
char *weechat_config_dir = NULL; /* config directory */
char *weechat_data_dir = NULL; /* data directory */
char *weechat_state_dir = NULL; /* state directory */
char *weechat_cache_dir = NULL; /* cache directory */
char *weechat_runtime_dir = NULL; /* runtime directory */
int weechat_locale_ok = 0; /* is locale OK? */
char *weechat_local_charset = NULL; /* example: ISO-8859-1, UTF-8 */
int weechat_server_cmd_line = 0; /* at least 1 server on cmd line */
char *weechat_force_plugin_autoload = NULL; /* force load of plugins */
int weechat_doc_gen = 0; /* doc generation */
char *weechat_doc_gen_path = NULL; /* path for doc generation */
int weechat_doc_gen_ok = 0; /* doc generation was successful? */
int weechat_plugin_no_dlclose = 0; /* remove calls to dlclose for libs */
/* (useful with valgrind) */
int weechat_no_gnutls = 0; /* remove init/deinit of gnutls */
/* (useful with valgrind/electric-f.)*/
int weechat_no_gcrypt = 0; /* remove init/deinit of gcrypt */
/* (useful with valgrind) */
struct t_weelist *weechat_startup_commands = NULL; /* startup commands */
/* (option -r) */
int weechat_auto_connect = 1; /* auto-connect to servers */
int weechat_auto_load_scripts = 1; /* auto-load scripts */
/*
* Display WeeChat startup message.
*/
void
weechat_startup_message (void)
{
if (weechat_headless)
{
string_fprintf (stdout,
_("WeeChat is running in headless mode "
"(ctrl-c to quit)."));
string_fprintf (stdout, "\n");
}
if (CONFIG_BOOLEAN(config_startup_display_logo))
{
gui_chat_printf (
NULL,
"%s ___ __ ______________ _____ \n"
"%s __ | / /___________ ____/__ /_______ __ /_\n"
"%s __ | /| / /_ _ \\ _ \\ / __ __ \\ __ `/ __/\n"
"%s __ |/ |/ / / __/ __/ /___ _ / / / /_/ // /_ \n"
"%s ____/|__/ \\___/\\___/\\____/ /_/ /_/\\__,_/ \\__/ ",
GUI_COLOR(GUI_COLOR_CHAT_NICK),
GUI_COLOR(GUI_COLOR_CHAT_NICK),
GUI_COLOR(GUI_COLOR_CHAT_NICK),
GUI_COLOR(GUI_COLOR_CHAT_NICK),
GUI_COLOR(GUI_COLOR_CHAT_NICK));
}
if (CONFIG_BOOLEAN(config_startup_display_version))
{
command_version_display (
NULL, /* buffer */
0, /* send_to_buffer_as_input */
0, /* translated_string */
0, /* display_git_version */
(weechat_upgrade_count > 0) ? 1 : 0); /* display_upgrades */
}
if (CONFIG_BOOLEAN(config_startup_display_logo) ||
CONFIG_BOOLEAN(config_startup_display_version))
{
gui_chat_printf (
NULL,
"- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
}
if (weechat_first_start)
{
/* message on first run (when weechat.conf is created) */
gui_chat_printf (NULL, _("Welcome to WeeChat!"));
gui_chat_printf (
NULL,
_("If you are discovering WeeChat, it is recommended to "
"read at least the quickstart guide, and the user's guide if "
"you have some time; they explain main WeeChat concepts."));
gui_chat_printf (
NULL,
_("All WeeChat docs are available at: %s"),
WEECHAT_WEBSITE_DOC);
gui_chat_printf (
NULL,
_("Moreover, there is inline help with /help on all commands and "
"options (use Tab key to complete the name)."));
gui_chat_printf (
NULL,
_("The command /fset can help to customize WeeChat."));
gui_chat_printf (
NULL,
_("You can add and connect to an IRC server with /server and "
"/connect commands (see /help server)."));
if (weechat_term_theme_light)
{
gui_chat_printf (
NULL,
_("The \"light\" theme will be automatically applied. "
"Use /theme reset to switch back to the default dark theme."));
}
gui_chat_printf (NULL, "");
gui_chat_printf (NULL, "---");
gui_chat_printf (NULL, "");
}
}
/*
* Display warnings about $TERM if it is detected as wrong.
*
* If $TERM is different from "screen" or "screen-256color" and that $STY is
* set (GNU screen) or $TMUX is set (tmux), then display a warning.
*/
void
weechat_term_check (void)
{
char *term, *sty, *tmux;
const char *screen_terms = "screen-256color, screen";
const char *tmux_terms = "tmux-256color, tmux, screen-256color, screen";
const char *ptr_terms;
int is_term_ok, is_screen, is_tmux;
term = getenv ("TERM");
sty = getenv ("STY");
tmux = getenv ("TMUX");
is_screen = (sty && sty[0]);
is_tmux = (tmux && tmux[0]);
if (is_screen || is_tmux)
{
/* check if $TERM is OK (according to screen/tmux) */
is_term_ok = 0;
ptr_terms = NULL;
if (is_screen)
{
is_term_ok = (term && (strncmp (term, "screen", 6) == 0));
ptr_terms = screen_terms;
}
else if (is_tmux)
{
is_term_ok = (term
&& ((strncmp (term, "screen", 6) == 0)
|| (strncmp (term, "tmux", 4) == 0)));
ptr_terms = tmux_terms;
}
/* display a warning if $TERM is NOT OK */
if (!is_term_ok)
{
gui_chat_printf_date_tags (
NULL,
0,
"term_warning",
/* TRANSLATORS: the "under %s" can be "under screen" or "under tmux" */
_("%sWarning: WeeChat is running under %s and $TERM is \"%s\", "
"which can cause display bugs; $TERM should be set to one "
"of these values: %s"),
gui_chat_prefix[GUI_CHAT_PREFIX_ERROR],
(is_screen) ? "screen" : "tmux",
(term) ? term : "",
ptr_terms);
gui_chat_printf_date_tags (
NULL,
0,
"term_warning",
_("%sYou should add this line in the file %s: %s"),
gui_chat_prefix[GUI_CHAT_PREFIX_ERROR],
(is_screen) ? "~/.screenrc" : "~/.tmux.conf",
(is_screen) ?
"term screen-256color" :
"set -g default-terminal \"tmux-256color\"");
}
}
}
/*
* Display warning about wrong locale ($LANG and $LC_*) if they are detected as
* wrong.
*/
void
weechat_locale_check (void)
{
if (!weechat_locale_ok)
{
gui_chat_printf (
NULL,
_("%sWarning: cannot set the locale; make sure $LANG and $LC_* "
"variables are correct"),
gui_chat_prefix[GUI_CHAT_PREFIX_ERROR]);
}
}
/*
* Shut down WeeChat.
*/
void
weechat_shutdown (int return_code, int crash)
{
gui_chat_print_lines_waiting_buffer (stderr);
log_close ();
network_end ();
debug_end ();
if (!crash && weechat_home_delete_on_exit)
{
/* remove temporary home (only if not crashing) */
dir_remove_home_dirs ();
}
free (weechat_argv0);
free (weechat_home_force);
free (weechat_config_dir);
free (weechat_data_dir);
free (weechat_state_dir);
free (weechat_cache_dir);
free (weechat_runtime_dir);
free (weechat_local_charset);
free (weechat_force_plugin_autoload);
weelist_free (weechat_startup_commands);
free (weechat_doc_gen_path);
if (crash)
abort ();
else if (weechat_doc_gen)
exit ((weechat_doc_gen_ok) ? 0 : 1);
else if (return_code >= 0)
exit (return_code);
}
/*
* Initialize gettext.
*/
void
weechat_init_gettext (void)
{
weechat_locale_ok = (setlocale (LC_ALL, "") != NULL); /* init gettext */
#if ENABLE_NLS == 1
bindtextdomain (PACKAGE, LOCALEDIR);
bind_textdomain_codeset (PACKAGE, "UTF-8");
textdomain (PACKAGE);
#endif /* ENABLE_NLS == 1 */
#ifdef HAVE_LANGINFO_CODESET
weechat_local_charset = strdup (nl_langinfo (CODESET));
#else
weechat_local_charset = strdup ("");
#endif /* HAVE_LANGINFO_CODESET */
utf8_init ();
}
/*
* Initialize WeeChat.
*/
void
weechat_init (int argc, char *argv[], void (*gui_init_cb)(void))
{
weechat_first_start_time = time (NULL); /* initialize start time */
gettimeofday (&weechat_current_start_timeval, NULL);
/* set the seed for the pseudo-random integer generator */
srand ((weechat_current_start_timeval.tv_sec
* weechat_current_start_timeval.tv_usec)
^ getpid ());
/* detect the terminal theme, before initializing the GUI */
weechat_term_theme_light = gui_term_theme_is_light ();
weeurl_init (); /* initialize URL */
string_init (); /* initialize string */
signal_init (); /* initialize signals */
hdata_init (); /* initialize hdata */
hook_init (); /* initialize hooks */
debug_init (); /* hook signals for debug */
gui_color_init (); /* initialize colors */
gui_chat_init (); /* initialize chat */
command_init (); /* initialize WeeChat commands */
completion_init (); /* add core completion hooks */
gui_key_init (); /* init keys */
network_init_gcrypt (); /* init gcrypt */
if (!secure_init ()) /* init secured data */
weechat_shutdown (EXIT_FAILURE, 0);
if (!secure_config_init ()) /* init secured data options (sec.*)*/
weechat_shutdown (EXIT_FAILURE, 0);
theme_init (); /* initialize theme registry */
theme_builtin_init (); /* register built-in themes */
if (!config_weechat_init ()) /* init WeeChat options (weechat.*) */
weechat_shutdown (EXIT_FAILURE, 0);
args_parse (argc, argv); /* parse command line args */
dir_create_home_dirs (); /* create WeeChat home directories */
log_init (); /* init log file */
plugin_api_init (); /* create some hooks (info,hdata,..)*/
secure_config_read (); /* read secured data options */
config_weechat_read (); /* read WeeChat options */
network_init_gnutls (); /* init GnuTLS */
if (gui_init_cb)
(*gui_init_cb) (); /* init WeeChat interface */
if (weechat_upgrading)
{
if (upgrade_weechat_load ()) /* upgrade with session file */
weechat_upgrade_count++; /* increase /upgrade count */
else
weechat_upgrading = 0;
}
if (!weechat_doc_gen)
weechat_startup_message (); /* display WeeChat startup message */
gui_chat_print_lines_waiting_buffer (NULL); /* display lines waiting */
weechat_term_check (); /* warning about wrong $TERM */
weechat_locale_check (); /* warning about wrong locale */
command_startup (0); /* command executed before plugins */
plugin_init (weechat_force_plugin_autoload, /* init plugin interface(s) */
argc, argv);
command_startup (1); /* commands executed after plugins */
if (!weechat_upgrading)
gui_layout_window_apply (gui_layout_current, -1);
if (weechat_upgrading)
upgrade_weechat_end (); /* remove .upgrade files + signal */
if (weechat_doc_gen)
{
weechat_doc_gen_ok = doc_generate (weechat_doc_gen_path);
weechat_quit = 1;
}
if (weechat_first_start && isatty (STDOUT_FILENO) && !weechat_headless && !weechat_doc_gen)
{
/* switch to "light" theme if terminal background was detected as "light" */
if (weechat_term_theme_light)
theme_apply ("light");
}
}
/*
* End WeeChat.
*/
void
weechat_end (void (*gui_end_cb)(int clean_exit))
{
gui_layout_store_on_exit (); /* store layout */
plugin_end (); /* end plugin interface(s) */
if (CONFIG_BOOLEAN(config_look_save_config_on_exit))
(void) config_weechat_write (); /* save WeeChat config file */
(void) secure_config_write (); /* save secured data */
if (gui_end_cb)
(*gui_end_cb) (1); /* shut down WeeChat GUI */
proxy_free_all (); /* free all proxies */
config_weechat_free (); /* free WeeChat options */
secure_config_free (); /* free secured data options */
config_file_free_all (); /* free all configuration files */
gui_key_end (); /* remove all keys */
unhook_all (); /* remove all hooks */
hdata_end (); /* end hdata */
secure_end (); /* end secured data */
theme_end (); /* end theme registry */
string_end (); /* end string */
weeurl_end ();
weechat_shutdown (-1, 0); /* end other things */
}
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