* 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;
+
+/* Whether this version of i3 is a debug build or a release build. */
+bool debug_build = false;
+
+/** 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;
xcb_key_symbols_free(keysyms);
keysyms = xcb_key_symbols_alloc(conn);
- xcb_get_numlock_mask(conn);
+ xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
ungrab_all_keys(conn);
DLOG("Re-grabbing...\n");
#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[]) {
bool delete_layout_path = false;
bool force_xinerama = false;
bool disable_signalhandler = false;
+ bool enable_32bit_visual = false;
static struct option long_options[] = {
{"no-autostart", no_argument, 0, 'a'},
{"config", required_argument, 0, 'c'},
{"layout", required_argument, 0, 'L'},
{"restart", required_argument, 0, 0},
{"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},
+ {"enable-32bit-visual", no_argument, 0, 0},
+ {"enable_32bit_visual", no_argument, 0, 0},
{0, 0, 0, 0}
};
int option_index = 0, opt;
+ xcb_void_cookie_t colormap_cookie;
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();
+ /* I3_VERSION contains either something like this:
+ * "4.0.2 (2011-11-11, branch "release")".
+ * or: "4.0.2-123-gCOFFEEBABE (2011-11-11, branch "next")".
+ *
+ * So we check for the offset of the first opening round bracket to
+ * determine whether this is a git version or a release version. */
+ debug_build = ((strchr(I3_VERSION, '(') - I3_VERSION) > 10);
+
+ /* On non-release builds, disable SHM logging by default. */
+ shmlog_size = (debug_build ? 25 * 1024 * 1024 : 0);
+
start_argv = argv;
while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) {
/* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
break;
case 0:
- if (strcmp(long_options[option_index].name, "force-xinerama") == 0) {
+ if (strcmp(long_options[option_index].name, "force-xinerama") == 0 ||
+ strcmp(long_options[option_index].name, "force_xinerama") == 0) {
force_xinerama = true;
ELOG("Using Xinerama instead of RandR. This option should be "
"avoided at all cost because it does not refresh the list "
} else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
disable_signalhandler = true;
break;
- } else if (strcmp(long_options[option_index].name, "get-socketpath") == 0) {
- char *socket_path = socket_path_from_x11();
+ } else if (strcmp(long_options[option_index].name, "get-socketpath") == 0 ||
+ strcmp(long_options[option_index].name, "get_socketpath") == 0) {
+ 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, "enable_32bit_visual") == 0 ||
+ strcmp(long_options[option_index].name, "enable-32bit-visual") == 0) {
+ LOG("Enabling 32 bit visual (if available)\n");
+ enable_32bit_visual = true;
+ break;
}
/* fall-through */
default:
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, "\t--enable-32bit-visual\n"
+ "\tMakes i3 use a 32 bit visual, if available. Necessary for\n"
+ "\tpseudo-transparency with xcompmgr.\n");
+ 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"
payload = sstrdup(argv[optind]);
} else {
char *both;
- if (asprintf(&both, "%s %s", payload, argv[optind]) == -1)
- err(EXIT_FAILURE, "asprintf");
+ sasprintf(&both, "%s %s", payload, argv[optind]);
free(payload);
payload = both;
}
optind++;
}
LOG("Command is: %s (%d bytes)\n", payload, strlen(payload));
- char *socket_path = socket_path_from_x11();
+ 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 (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;
+
+ if (enable_32bit_visual) {
+ xcb_depth_iterator_t depth_iter;
+ xcb_visualtype_iterator_t visual_iter;
+ for (depth_iter = xcb_screen_allowed_depths_iterator(root_screen);
+ depth_iter.rem;
+ xcb_depth_next(&depth_iter)) {
+ if (depth_iter.data->depth != 32)
+ continue;
+ visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
+ if (!visual_iter.rem)
+ continue;
+
+ visual_id = visual_iter.data->visual_id;
+ root_depth = depth_iter.data->depth;
+ colormap = xcb_generate_id(conn);
+ colormap_cookie = xcb_create_colormap_checked(conn, XCB_COLORMAP_ALLOC_NONE, colormap, root, visual_id);
+ DLOG("Found a visual with 32 bit depth.\n");
+ break;
+ }
+ }
+
+ 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);
cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
check_error(conn, cookie, "Another window manager seems to be running");
+ /* By now we already checked for replies once, so let’s see if colormap
+ * creation worked (if requested). */
+ if (colormap != root_screen->default_colormap) {
+ xcb_generic_error_t *error = xcb_request_check(conn, colormap_cookie);
+ if (error != NULL) {
+ ELOG("Could not create ColorMap for 32 bit visual, falling back to X11 default.\n");
+ 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);
+ free(error);
+ }
+ }
+
xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
if (greply == NULL) {
ELOG("Could not get geometry of the root window, exiting\n");
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);
- xcb_get_numlock_mask(conn);
+ xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
translate_keysyms();
grab_all_keys(conn, false);
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 */
struct Autostart *exec;
TAILQ_FOREACH(exec, &autostarts, autostarts) {
LOG("auto-starting %s\n", exec->command);
- start_application(exec->command);
+ start_application(exec->command, exec->no_startup_id);
}
}
struct Autostart *exec_always;
TAILQ_FOREACH(exec_always, &autostarts_always, autostarts_always) {
LOG("auto-starting (always!) %s\n", exec_always->command);
- start_application(exec_always->command);
+ start_application(exec_always->command, exec_always->no_startup_id);
}
/* Start i3bar processes for all configured bars */
Barconfig *barconfig;
TAILQ_FOREACH(barconfig, &barconfigs, configs) {
char *command = NULL;
- asprintf(&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);
+ start_application(command, true);
free(command);
}
projects / i3 / i3 / blobdiff