* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
- * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
+ * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
*
* main.c: Initialization, main loop
*
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
#include "all.h"
#include "sd-daemon.h"
+/* The original value of RLIMIT_CORE when i3 was started. We need to restore
+ * this before starting any other process, since we set RLIMIT_CORE to
+ * RLIM_INFINITY for i3 debugging versions. */
+struct rlimit original_rlimit_core;
+
+/** The number of file descriptors passed via socket activation. */
+int listen_fds;
+
static int xkb_event_base;
int xkb_current_group;
xcb_screen_t *root_screen;
xcb_window_t root;
+
+/* Color depth, visual id and colormap to use when creating windows and
+ * pixmaps. Will use 32 bit depth and an appropriate visual, if available,
+ * otherwise the root window’s default (usually 24 bit TrueColor). */
uint8_t root_depth;
+xcb_visualid_t visual_id;
+xcb_colormap_t colormap;
struct ev_loop *main_loop;
* Exit handler which destroys the main_loop. Will trigger cleanup handlers.
*
*/
-static void i3_exit() {
+static void i3_exit(void) {
/* We need ev >= 4 for the following code. Since it is not *that* important (it
* only makes sure that there are no i3-nagbar instances left behind) we still
* support old systems with libev 3. */
#if EV_VERSION_MAJOR >= 4
ev_loop_destroy(main_loop);
#endif
+
+ if (*shmlogname != '\0') {
+ fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname);
+ fflush(stderr);
+ shm_unlink(shmlogname);
+ }
+}
+
+/*
+ * (One-shot) Handler for all signals with default action "Term", see signal(7)
+ *
+ * Unlinks the SHM log and re-raises the signal.
+ *
+ */
+static void handle_signal(int sig, siginfo_t *info, void *data) {
+ fprintf(stderr, "Received signal %d, terminating\n", sig);
+ if (*shmlogname != '\0') {
+ fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname);
+ shm_unlink(shmlogname);
+ }
+ fflush(stderr);
+ raise(sig);
}
int main(int argc, char *argv[]) {
+ /* Keep a symbol pointing to the I3_VERSION string constant so that we have
+ * it in gdb backtraces. */
+ const char *i3_version __attribute__ ((unused)) = I3_VERSION;
char *override_configpath = NULL;
bool autostart = true;
char *layout_path = NULL;
bool delete_layout_path = false;
bool force_xinerama = false;
+ char *fake_outputs = NULL;
bool disable_signalhandler = false;
static struct option long_options[] = {
{"no-autostart", no_argument, 0, 'a'},
{"force-xinerama", no_argument, 0, 0},
{"force_xinerama", no_argument, 0, 0},
{"disable-signalhandler", no_argument, 0, 0},
+ {"shmlog-size", required_argument, 0, 0},
+ {"shmlog_size", required_argument, 0, 0},
{"get-socketpath", no_argument, 0, 0},
{"get_socketpath", no_argument, 0, 0},
+ {"fake_outputs", required_argument, 0, 0},
+ {"fake-outputs", required_argument, 0, 0},
{0, 0, 0, 0}
};
int option_index = 0, opt;
setlocale(LC_ALL, "");
+ /* Get the RLIMIT_CORE limit at startup time to restore this before
+ * starting processes. */
+ getrlimit(RLIMIT_CORE, &original_rlimit_core);
+
/* Disable output buffering to make redirects in .xsession actually useful for debugging */
if (!isatty(fileno(stdout)))
setbuf(stdout, NULL);
srand(time(NULL));
+ /* Init logging *before* initializing debug_build to guarantee early
+ * (file) logging. */
init_logging();
+ /* On non-release builds, disable SHM logging by default. */
+ shmlog_size = (is_debug_build() ? 25 * 1024 * 1024 : 0);
+
start_argv = argv;
while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) {
only_check_config = true;
break;
case 'v':
- printf("i3 version " I3_VERSION " © 2009-2011 Michael Stapelberg and contributors\n");
+ printf("i3 version " I3_VERSION " © 2009-2012 Michael Stapelberg and contributors\n");
exit(EXIT_SUCCESS);
case 'V':
set_verbosity(true);
break;
case 'd':
- LOG("Enabling debug loglevel %s\n", optarg);
- add_loglevel(optarg);
+ LOG("Enabling debug logging\n");
+ set_debug_logging(true);
break;
case 'l':
/* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
break;
} else if (strcmp(long_options[option_index].name, "get-socketpath") == 0 ||
strcmp(long_options[option_index].name, "get_socketpath") == 0) {
- char *socket_path = socket_path_from_x11();
+ char *socket_path = root_atom_contents("I3_SOCKET_PATH");
if (socket_path) {
printf("%s\n", socket_path);
return 0;
}
return 1;
+ } else if (strcmp(long_options[option_index].name, "shmlog-size") == 0 ||
+ strcmp(long_options[option_index].name, "shmlog_size") == 0) {
+ shmlog_size = atoi(optarg);
+ /* Re-initialize logging immediately to get as many
+ * logmessages as possible into the SHM log. */
+ init_logging();
+ LOG("Limiting SHM log size to %d bytes\n", shmlog_size);
+ break;
} else if (strcmp(long_options[option_index].name, "restart") == 0) {
FREE(layout_path);
layout_path = sstrdup(optarg);
delete_layout_path = true;
break;
+ } else if (strcmp(long_options[option_index].name, "fake-outputs") == 0 ||
+ strcmp(long_options[option_index].name, "fake_outputs") == 0) {
+ LOG("Initializing fake outputs: %s\n", optarg);
+ fake_outputs = sstrdup(optarg);
+ break;
}
/* fall-through */
default:
- fprintf(stderr, "Usage: %s [-c configfile] [-d loglevel] [-a] [-v] [-V] [-C]\n", argv[0]);
+ fprintf(stderr, "Usage: %s [-c configfile] [-d all] [-a] [-v] [-V] [-C]\n", argv[0]);
fprintf(stderr, "\n");
fprintf(stderr, "\t-a disable autostart ('exec' lines in config)\n");
fprintf(stderr, "\t-c <file> use the provided configfile instead\n");
fprintf(stderr, "\t-C validate configuration file and exit\n");
- fprintf(stderr, "\t-d <level> enable debug output with the specified loglevel\n");
+ fprintf(stderr, "\t-d all enable debug output\n");
fprintf(stderr, "\t-L <file> path to the serialized layout during restarts\n");
fprintf(stderr, "\t-v display version and exit\n");
fprintf(stderr, "\t-V enable verbose mode\n");
fprintf(stderr, "\t--get-socketpath\n"
"\tRetrieve the i3 IPC socket path from X11, print it, then exit.\n");
fprintf(stderr, "\n");
+ fprintf(stderr, "\t--shmlog-size <limit>\n"
+ "\tLimits the size of the i3 SHM log to <limit> bytes. Setting this\n"
+ "\tto 0 disables SHM logging entirely.\n"
+ "\tThe default is %d bytes.\n", shmlog_size);
+ fprintf(stderr, "\n");
fprintf(stderr, "If you pass plain text arguments, i3 will interpret them as a command\n"
"to send to a currently running i3 (like i3-msg). This allows you to\n"
"use nice and logical commands, such as:\n"
/* If the user passes more arguments, we act like i3-msg would: Just send
* the arguments as an IPC message to i3. This allows for nice semantic
* commands such as 'i3 border none'. */
- if (optind < argc) {
+ if (!only_check_config && optind < argc) {
/* We enable verbose mode so that the user knows what’s going on.
* This should make it easier to find mistakes when the user passes
* arguments by mistake. */
}
optind++;
}
- LOG("Command is: %s (%d bytes)\n", payload, strlen(payload));
- char *socket_path = socket_path_from_x11();
+ DLOG("Command is: %s (%zd bytes)\n", payload, strlen(payload));
+ char *socket_path = root_atom_contents("I3_SOCKET_PATH");
if (!socket_path) {
ELOG("Could not get i3 IPC socket path\n");
return 1;
return 0;
}
+ /* Enable logging to handle the case when the user did not specify --shmlog-size */
+ init_logging();
+
+ /* Try to enable core dumps by default when running a debug build */
+ if (is_debug_build()) {
+ struct rlimit limit = { RLIM_INFINITY, RLIM_INFINITY };
+ setrlimit(RLIMIT_CORE, &limit);
+
+ /* The following code is helpful, but not required. We thus don’t pay
+ * much attention to error handling, non-linux or other edge cases. */
+ char cwd[PATH_MAX];
+ LOG("CORE DUMPS: You are running a development version of i3, so coredumps were automatically enabled (ulimit -c unlimited).\n");
+ if (getcwd(cwd, sizeof(cwd)) != NULL)
+ LOG("CORE DUMPS: Your current working directory is \"%s\".\n", cwd);
+ int patternfd;
+ if ((patternfd = open("/proc/sys/kernel/core_pattern", O_RDONLY)) >= 0) {
+ memset(cwd, '\0', sizeof(cwd));
+ if (read(patternfd, cwd, sizeof(cwd)) > 0)
+ /* a trailing newline is included in cwd */
+ LOG("CORE DUMPS: Your core_pattern is: %s", cwd);
+ close(patternfd);
+ }
+ }
+
LOG("i3 (tree) version " I3_VERSION " starting\n");
conn = xcb_connect(NULL, &conn_screen);
root_screen = xcb_aux_get_screen(conn, conn_screen);
root = root_screen->root;
+
+ /* By default, we use the same depth and visual as the root window, which
+ * usually is TrueColor (24 bit depth) and the corresponding visual.
+ * However, we also check if a 32 bit depth and visual are available (for
+ * transparency) and use it if so. */
root_depth = root_screen->root_depth;
+ visual_id = root_screen->root_visual;
+ colormap = root_screen->default_colormap;
+
+ DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_id);
+
xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
xcb_query_pointer_cookie_t pointercookie = xcb_query_pointer(conn, root);
property_handlers_init();
- /* Set up the atoms we support */
- xcb_atom_t supported_atoms[] = {
-#define xmacro(atom) A_ ## atom,
-#include "atoms.xmacro"
-#undef xmacro
- };
- xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTED, XCB_ATOM_ATOM, 32, 16, supported_atoms);
- /* Set up the window manager’s name */
- xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32, 1, &root);
- xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
+ ewmh_setup_hints();
keysyms = xcb_key_symbols_alloc(conn);
free(greply);
- /* Force Xinerama (for drivers which don't support RandR yet, esp. the
- * nVidia binary graphics driver), when specified either in the config
- * file or on command-line */
- if (force_xinerama || config.force_xinerama) {
+ /* Setup fake outputs for testing */
+ if (fake_outputs == NULL && config.fake_outputs != NULL)
+ fake_outputs = config.fake_outputs;
+
+ if (fake_outputs != NULL) {
+ fake_outputs_init(fake_outputs);
+ FREE(fake_outputs);
+ config.fake_outputs = NULL;
+ } else if (force_xinerama || config.force_xinerama) {
+ /* Force Xinerama (for drivers which don't support RandR yet, esp. the
+ * nVidia binary graphics driver), when specified either in the config
+ * file or on command-line */
xinerama_init();
} else {
DLOG("Checking for XRandR...\n");
Output *output = NULL;
if (!(pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL))) {
ELOG("Could not query pointer position, using first screen\n");
- output = get_first_output();
} else {
DLOG("Pointer at %d, %d\n", pointerreply->root_x, pointerreply->root_y);
output = get_output_containing(pointerreply->root_x, pointerreply->root_y);
ev_io_start(main_loop, ipc_io);
}
- /* Also handle the UNIX domain sockets passed via socket activation */
- int fds = sd_listen_fds(1);
- if (fds < 0)
+ /* Also handle the UNIX domain sockets passed via socket activation. The
+ * parameter 1 means "remove the environment variables", we don’t want to
+ * pass these to child processes. */
+ listen_fds = sd_listen_fds(0);
+ if (listen_fds < 0)
ELOG("socket activation: Error in sd_listen_fds\n");
- else if (fds == 0)
+ else if (listen_fds == 0)
DLOG("socket activation: no sockets passed\n");
else {
- for (int fd = SD_LISTEN_FDS_START; fd < (SD_LISTEN_FDS_START + fds); fd++) {
+ int flags;
+ for (int fd = SD_LISTEN_FDS_START;
+ fd < (SD_LISTEN_FDS_START + listen_fds);
+ fd++) {
DLOG("socket activation: also listening on fd %d\n", fd);
+
+ /* sd_listen_fds() enables FD_CLOEXEC by default.
+ * However, we need to keep the file descriptors open for in-place
+ * restarting, therefore we explicitly disable FD_CLOEXEC. */
+ if ((flags = fcntl(fd, F_GETFD)) < 0 ||
+ fcntl(fd, F_SETFD, flags & ~FD_CLOEXEC) < 0) {
+ ELOG("Could not disable FD_CLOEXEC on fd %d\n", fd);
+ }
+
struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
ev_io_init(ipc_io, ipc_new_client, fd, EV_READ);
ev_io_start(main_loop, ipc_io);
manage_existing_windows(root);
+ struct sigaction action;
+
+ action.sa_sigaction = handle_signal;
+ action.sa_flags = SA_NODEFER | SA_RESETHAND | SA_SIGINFO;
+ sigemptyset(&action.sa_mask);
+
if (!disable_signalhandler)
setup_signal_handler();
+ else {
+ /* Catch all signals with default action "Core", see signal(7) */
+ if (sigaction(SIGQUIT, &action, NULL) == -1 ||
+ sigaction(SIGILL, &action, NULL) == -1 ||
+ sigaction(SIGABRT, &action, NULL) == -1 ||
+ sigaction(SIGFPE, &action, NULL) == -1 ||
+ sigaction(SIGSEGV, &action, NULL) == -1)
+ ELOG("Could not setup signal handler");
+ }
+
+ /* Catch all signals with default action "Term", see signal(7) */
+ if (sigaction(SIGHUP, &action, NULL) == -1 ||
+ sigaction(SIGINT, &action, NULL) == -1 ||
+ sigaction(SIGALRM, &action, NULL) == -1 ||
+ sigaction(SIGUSR1, &action, NULL) == -1 ||
+ sigaction(SIGUSR2, &action, NULL) == -1)
+ ELOG("Could not setup signal handler");
/* Ignore SIGPIPE to survive errors when an IPC client disconnects
* while we are sending him a message */
Barconfig *barconfig;
TAILQ_FOREACH(barconfig, &barconfigs, configs) {
char *command = NULL;
- sasprintf(&command, "i3bar --bar_id=%s --socket=\"%s\"",
- barconfig->id, current_socketpath);
+ sasprintf(&command, "%s --bar_id=%s --socket=\"%s\"",
+ barconfig->i3bar_command ? barconfig->i3bar_command : "i3bar",
+ barconfig->id, current_socketpath);
LOG("Starting bar process: %s\n", command);
start_application(command, true);
free(command);
projects / i3 / i3 / blobdiff