X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=src%2Futil.c;h=0a8ba6e2785194b0453d27923d6833bd3387de46;hb=884214f14fdbd0a4a368d2a36d5e50324fa1d52a;hp=8273e0cf0150cda981d42af87b3f1171e336f10b;hpb=9436e6f26e971bb3beed3790e28c33b9a6eeedce;p=i3%2Fi3 diff --git a/src/util.c b/src/util.c index 8273e0cf..0a8ba6e2 100644 --- a/src/util.c +++ b/src/util.c @@ -1,8 +1,10 @@ +#undef I3__FILE__ +#define I3__FILE__ "util.c" /* * vim:ts=4:sw=4:expandtab * * i3 - an improved dynamic tiling window manager - * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE) + * © 2009 Michael Stapelberg and contributors (see also: LICENSE) * * util.c: Utility functions, which can be useful everywhere within i3 (see * also libi3). @@ -19,6 +21,7 @@ #include #include #include +#include #define SN_API_NOT_YET_FROZEN 1 #include @@ -45,6 +48,45 @@ Rect rect_add(Rect a, Rect b) { a.height + b.height}; } +Rect rect_sub(Rect a, Rect b) { + return (Rect){a.x - b.x, + a.y - b.y, + a.width - b.width, + a.height - b.height}; +} + +/* + * Returns true if the name consists of only digits. + * + */ +__attribute__((pure)) bool name_is_digits(const char *name) { + /* positive integers and zero are interpreted as numbers */ + for (size_t i = 0; i < strlen(name); i++) + if (!isdigit(name[i])) + return false; + + return true; +} + +/* + * Parses the workspace name as a number. Returns -1 if the workspace should be + * interpreted as a "named workspace". + * + */ +long ws_name_to_number(const char *name) { + /* positive integers and zero are interpreted as numbers */ + char *endptr = NULL; + long parsed_num = strtol(name, &endptr, 10); + if (parsed_num == LONG_MIN || + parsed_num == LONG_MAX || + parsed_num < 0 || + endptr == name) { + parsed_num = -1; + } + + return parsed_num; +} + /* * Updates *destination with new_value and returns true if it was changed or false * if it was the same @@ -111,51 +153,19 @@ void exec_i3_utility(char *name, char *argv[]) { void check_error(xcb_connection_t *conn, xcb_void_cookie_t cookie, char *err_message) { xcb_generic_error_t *error = xcb_request_check(conn, cookie); if (error != NULL) { - fprintf(stderr, "ERROR: %s (X error %d)\n", err_message , error->error_code); + fprintf(stderr, "ERROR: %s (X error %d)\n", err_message, error->error_code); xcb_disconnect(conn); exit(-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. - * - */ -char *resolve_tilde(const char *path) { - static glob_t globbuf; - char *head, *tail, *result; - - tail = strchr(path, '/'); - head = strndup(path, tail ? 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; -} - /* * Checks if the given path exists by calling stat(). * */ bool path_exists(const char *path) { - struct stat buf; - return (stat(path, &buf) == 0); + struct stat buf; + return (stat(path, &buf) == 0); } /* @@ -173,73 +183,27 @@ static char **append_argument(char **original, char *argument) { return original; } /* Copy the original array */ - char **result = smalloc((num_args+2) * sizeof(char*)); - memcpy(result, original, num_args * sizeof(char*)); + char **result = smalloc((num_args + 2) * sizeof(char *)); + memcpy(result, original, num_args * sizeof(char *)); result[num_args] = argument; - result[num_args+1] = NULL; + result[num_args + 1] = NULL; return result; } -/* - * Returns the name of a temporary file with the specified prefix. - * - */ -char *get_process_filename(const char *prefix) { - /* dir stores the directory path for this and all subsequent calls so that - * we only create a temporary directory once per i3 instance. */ - static char *dir = NULL; - if (dir == NULL) { - /* Check if XDG_RUNTIME_DIR is set. If so, we use XDG_RUNTIME_DIR/i3 */ - if ((dir = getenv("XDG_RUNTIME_DIR"))) { - char *tmp; - sasprintf(&tmp, "%s/i3", dir); - dir = tmp; - if (!path_exists(dir)) { - if (mkdir(dir, 0700) == -1) { - perror("mkdir()"); - return NULL; - } - } - } else { - /* If not, we create a (secure) temp directory using the template - * /tmp/i3-.XXXXXX */ - struct passwd *pw = getpwuid(getuid()); - const char *username = pw ? pw->pw_name : "unknown"; - sasprintf(&dir, "/tmp/i3-%s.XXXXXX", username); - /* mkdtemp modifies dir */ - if (mkdtemp(dir) == NULL) { - perror("mkdtemp()"); - return NULL; - } - } - } - char *filename; - sasprintf(&filename, "%s/%s.%d", dir, prefix, getpid()); - return filename; -} - -#define y(x, ...) yajl_gen_ ## x (gen, ##__VA_ARGS__) -#define ystr(str) yajl_gen_string(gen, (unsigned char*)str, strlen(str)) +#define y(x, ...) yajl_gen_##x(gen, ##__VA_ARGS__) +#define ystr(str) yajl_gen_string(gen, (unsigned char *)str, strlen(str)) char *store_restart_layout(void) { setlocale(LC_NUMERIC, "C"); -#if YAJL_MAJOR >= 2 yajl_gen gen = yajl_gen_alloc(NULL); -#else - yajl_gen gen = yajl_gen_alloc(NULL, NULL); -#endif dump_node(gen, croot, true); setlocale(LC_NUMERIC, ""); const unsigned char *payload; -#if YAJL_MAJOR >= 2 size_t length; -#else - unsigned int length; -#endif y(get_buf, &payload, &length); /* create a temporary file if one hasn't been specified, or just @@ -253,6 +217,15 @@ char *store_restart_layout(void) { filename = resolve_tilde(config.restart_state_path); } + /* create the directory, it could have been cleaned up before restarting or + * may not exist at all in case it was user-specified. */ + char *filenamecopy = sstrdup(filename); + char *base = dirname(filenamecopy); + DLOG("Creating \"%s\" for storing the restart layout\n", base); + if (!mkdirp(base)) + ELOG("Could not create \"%s\" for storing the restart layout, layout will be lost.\n", base); + free(filenamecopy); + int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR); if (fd == -1) { perror("open()"); @@ -260,33 +233,17 @@ char *store_restart_layout(void) { return NULL; } - int written = 0; - while (written < length) { - int n = write(fd, payload + written, length - written); - /* TODO: correct error-handling */ - if (n == -1) { - perror("write()"); - free(filename); - close(fd); - return NULL; - } - if (n == 0) { - printf("write == 0?\n"); - free(filename); - close(fd); - return NULL; - } - written += n; -#if YAJL_MAJOR >= 2 - printf("written: %d of %zd\n", written, length); -#else - printf("written: %d of %d\n", written, length); -#endif + if (writeall(fd, payload, length) == -1) { + ELOG("Could not write restart layout to \"%s\", layout will be lost: %s\n", filename, strerror(errno)); + free(filename); + close(fd); + return NULL; } + close(fd); if (length > 0) { - printf("layout: %.*s\n", (int)length, payload); + DLOG("layout: %.*s\n", (int)length, payload); } y(free); @@ -302,7 +259,8 @@ char *store_restart_layout(void) { void i3_restart(bool forget_layout) { char *restart_filename = forget_layout ? NULL : store_restart_layout(); - kill_configerror_nagbar(true); + kill_nagbar(&config_error_nagbar_pid, true); + kill_nagbar(&command_error_nagbar_pid, true); restore_geometry(); @@ -316,8 +274,9 @@ void i3_restart(bool forget_layout) { if (restart_filename != NULL) { /* create the new argv */ int num_args; - for (num_args = 0; start_argv[num_args] != NULL; num_args++); - char **new_argv = scalloc((num_args + 3) * sizeof(char*)); + for (num_args = 0; start_argv[num_args] != NULL; num_args++) + ; + char **new_argv = scalloc((num_args + 3) * sizeof(char *)); /* copy the arguments, but skip the ones we'll replace */ int write_index = 0; @@ -379,3 +338,103 @@ void *memmem(const void *l, size_t l_len, const void *s, size_t s_len) { } #endif + +/* + * Handler which will be called when we get a SIGCHLD for the nagbar, meaning + * it exited (or could not be started, depending on the exit code). + * + */ +static void nagbar_exited(EV_P_ ev_child *watcher, int revents) { + ev_child_stop(EV_A_ watcher); + + if (!WIFEXITED(watcher->rstatus)) { + ELOG("ERROR: i3-nagbar did not exit normally.\n"); + return; + } + + int exitcode = WEXITSTATUS(watcher->rstatus); + DLOG("i3-nagbar process exited with status %d\n", exitcode); + if (exitcode == 2) { + ELOG("ERROR: i3-nagbar could not be found. Is it correctly installed on your system?\n"); + } + + *((pid_t *)watcher->data) = -1; +} + +/* + * Cleanup handler. Will be called when i3 exits. Kills i3-nagbar with signal + * SIGKILL (9) to make sure there are no left-over i3-nagbar processes. + * + */ +static void nagbar_cleanup(EV_P_ ev_cleanup *watcher, int revent) { + pid_t *nagbar_pid = (pid_t *)watcher->data; + if (*nagbar_pid != -1) { + LOG("Sending SIGKILL (%d) to i3-nagbar with PID %d\n", SIGKILL, *nagbar_pid); + kill(*nagbar_pid, SIGKILL); + } +} + +/* + * Starts an i3-nagbar instance with the given parameters. Takes care of + * handling SIGCHLD and killing i3-nagbar when i3 exits. + * + * The resulting PID will be stored in *nagbar_pid and can be used with + * kill_nagbar() to kill the bar later on. + * + */ +void start_nagbar(pid_t *nagbar_pid, char *argv[]) { + if (*nagbar_pid != -1) { + DLOG("i3-nagbar already running (PID %d), not starting again.\n", *nagbar_pid); + return; + } + + *nagbar_pid = fork(); + if (*nagbar_pid == -1) { + warn("Could not fork()"); + return; + } + + /* child */ + if (*nagbar_pid == 0) + exec_i3_utility("i3-nagbar", argv); + + DLOG("Starting i3-nagbar with PID %d\n", *nagbar_pid); + + /* parent */ + /* install a child watcher */ + ev_child *child = smalloc(sizeof(ev_child)); + ev_child_init(child, &nagbar_exited, *nagbar_pid, 0); + child->data = nagbar_pid; + ev_child_start(main_loop, child); + + /* install a cleanup watcher (will be called when i3 exits and i3-nagbar is + * still running) */ + ev_cleanup *cleanup = smalloc(sizeof(ev_cleanup)); + ev_cleanup_init(cleanup, nagbar_cleanup); + cleanup->data = nagbar_pid; + ev_cleanup_start(main_loop, cleanup); +} + +/* + * Kills the i3-nagbar process, if *nagbar_pid != -1. + * + * If wait_for_it is set (restarting i3), this function will waitpid(), + * otherwise, ev is assumed to handle it (reloading). + * + */ +void kill_nagbar(pid_t *nagbar_pid, bool wait_for_it) { + if (*nagbar_pid == -1) + return; + + if (kill(*nagbar_pid, SIGTERM) == -1) + warn("kill(configerror_nagbar) failed"); + + if (!wait_for_it) + return; + + /* When restarting, we don’t enter the ev main loop anymore and after the + * exec(), our old pid is no longer watched. So, ev won’t handle SIGCHLD + * for us and we would end up with a process. Therefore we + * waitpid() here. */ + waitpid(*nagbar_pid, NULL, 0); +}