From 5b1a8d62b9c8fa7c25b70e01910abd761fae9855 Mon Sep 17 00:00:00 2001 From: Brian Ashworth Date: Wed, 5 Jun 2019 14:16:37 -0400 Subject: [PATCH] config/input: validate xkb keymap before storing This allows for an optional validation stage when storing an input config. Currently, only the xkb keymap is validated. If storing the delta input config will result in any invalid xkb keymaps, the input config will not be stored and error will be populated with the first line of the xkbcommon log. --- include/sway/config.h | 2 +- sway/commands/input.c | 11 ++- sway/commands/input/events.c | 2 +- sway/config/input.c | 134 +++++++++++++++++++++++++++-------- 4 files changed, 111 insertions(+), 38 deletions(-) diff --git a/include/sway/config.h b/include/sway/config.h index 311adb164..57ae3c639 100644 --- a/include/sway/config.h +++ b/include/sway/config.h @@ -581,7 +581,7 @@ struct input_config *new_input_config(const char* identifier); void merge_input_config(struct input_config *dst, struct input_config *src); -struct input_config *store_input_config(struct input_config *ic); +struct input_config *store_input_config(struct input_config *ic, char **error); void input_config_fill_rule_names(struct input_config *ic, struct xkb_rule_names *rules); diff --git a/sway/commands/input.c b/sway/commands/input.c index 23a6644fd..d95c4baf9 100644 --- a/sway/commands/input.c +++ b/sway/commands/input.c @@ -88,9 +88,10 @@ struct cmd_results *cmd_input(int argc, char **argv) { if (!res || res->status == CMD_SUCCESS) { char *error = NULL; - struct xkb_keymap *keymap = sway_keyboard_compile_keymap( - config->handler_context.input_config, &error); - if (!keymap) { + struct input_config *ic = + store_input_config(config->handler_context.input_config, &error); + if (!ic) { + free_input_config(config->handler_context.input_config); if (res) { free_cmd_results(res); } @@ -99,10 +100,6 @@ struct cmd_results *cmd_input(int argc, char **argv) { free(error); return res; } - xkb_keymap_unref(keymap); - - struct input_config *ic = - store_input_config(config->handler_context.input_config); input_manager_apply_input_config(ic); retranslate_keysyms(ic); diff --git a/sway/commands/input/events.c b/sway/commands/input/events.c index 44bc9e74a..cd2985ee9 100644 --- a/sway/commands/input/events.c +++ b/sway/commands/input/events.c @@ -101,7 +101,7 @@ static void toggle_wildcard_send_events(int argc, char **argv) { } else { toggle_supported_send_events_for_device(ic, input_device); } - store_input_config(ic); + store_input_config(ic, NULL); } } diff --git a/sway/config/input.c b/sway/config/input.c index 9c533e710..c4f64eb8e 100644 --- a/sway/config/input.c +++ b/sway/config/input.c @@ -3,6 +3,7 @@ #include #include #include "sway/config.h" +#include "sway/input/keyboard.h" #include "log.h" struct input_config *new_input_config(const char* identifier) { @@ -133,6 +134,49 @@ void merge_input_config(struct input_config *dst, struct input_config *src) { } } +static bool validate_xkb_merge(struct input_config *dest, + struct input_config *src, char **xkb_error) { + struct input_config *temp = new_input_config("temp"); + if (dest) { + merge_input_config(temp, dest); + } + merge_input_config(temp, src); + + struct xkb_keymap *keymap = sway_keyboard_compile_keymap(temp, xkb_error); + free_input_config(temp); + if (!keymap) { + return false; + } + + xkb_keymap_unref(keymap); + return true; +} + +static bool validate_wildcard_on_all(struct input_config *wildcard, + char **error) { + for (int i = 0; i < config->input_configs->length; i++) { + struct input_config *ic = config->input_configs->items[i]; + if (strcmp(wildcard->identifier, ic->identifier) != 0) { + sway_log(SWAY_DEBUG, "Validating xkb merge of * on %s", + ic->identifier); + if (!validate_xkb_merge(ic, wildcard, error)) { + return false; + } + } + } + + for (int i = 0; i < config->input_type_configs->length; i++) { + struct input_config *ic = config->input_type_configs->items[i]; + sway_log(SWAY_DEBUG, "Validating xkb merge of * config on %s", + ic->identifier); + if (!validate_xkb_merge(ic, wildcard, error)) { + return false; + } + } + + return true; +} + static void merge_wildcard_on_all(struct input_config *wildcard) { for (int i = 0; i < config->input_configs->length; i++) { struct input_config *ic = config->input_configs->items[i]; @@ -144,11 +188,28 @@ static void merge_wildcard_on_all(struct input_config *wildcard) { for (int i = 0; i < config->input_type_configs->length; i++) { struct input_config *ic = config->input_type_configs->items[i]; - if (strcmp(wildcard->identifier, ic->identifier) != 0) { - sway_log(SWAY_DEBUG, "Merging input * config on %s", ic->identifier); - merge_input_config(ic, wildcard); + sway_log(SWAY_DEBUG, "Merging input * config on %s", ic->identifier); + merge_input_config(ic, wildcard); + } +} + +static bool validate_type_on_existing(struct input_config *type_wildcard, + char **error) { + for (int i = 0; i < config->input_configs->length; i++) { + struct input_config *ic = config->input_configs->items[i]; + if (ic->input_type == NULL) { + continue; + } + + if (strcmp(ic->input_type, type_wildcard->identifier + 5) == 0) { + sway_log(SWAY_DEBUG, "Validating merge of %s on %s", + type_wildcard->identifier, ic->identifier); + if (!validate_xkb_merge(ic, type_wildcard, error)) { + return false; + } } } + return true; } static void merge_type_on_existing(struct input_config *type_wildcard) { @@ -167,44 +228,59 @@ static void merge_type_on_existing(struct input_config *type_wildcard) { } } -struct input_config *store_input_config(struct input_config *ic) { +struct input_config *store_input_config(struct input_config *ic, + char **error) { bool wildcard = strcmp(ic->identifier, "*") == 0; + if (wildcard && error && !validate_wildcard_on_all(ic, error)) { + return NULL; + } + + bool type = strncmp(ic->identifier, "type:", strlen("type:")) == 0; + if (type && error && !validate_type_on_existing(ic, error)) { + return NULL; + } + + list_t *config_list = type ? config->input_type_configs + : config->input_configs; + + struct input_config *current = NULL; + bool new_current = false; + + int i = list_seq_find(config_list, input_identifier_cmp, ic->identifier); + if (i >= 0) { + current = config_list->items[i]; + } + + i = list_seq_find(config->input_configs, input_identifier_cmp, "*"); + if (!current && i >= 0) { + current = new_input_config(ic->identifier); + merge_input_config(current, config->input_configs->items[i]); + new_current = true; + } + + if (error && !validate_xkb_merge(current, ic, error)) { + if (new_current) { + free_input_config(current); + } + return NULL; + } + if (wildcard) { merge_wildcard_on_all(ic); } - list_t *config_list = NULL; - if (strncmp(ic->identifier, "type:", 5) == 0) { - config_list = config->input_type_configs; + if (type) { merge_type_on_existing(ic); - } else { - config_list = config->input_configs; } - int i = list_seq_find(config_list, input_identifier_cmp, - ic->identifier); - if (i >= 0) { - sway_log(SWAY_DEBUG, "Merging on top of existing input config"); - struct input_config *current = config_list->items[i]; + if (current) { merge_input_config(current, ic); free_input_config(ic); ic = current; - } else if (!wildcard) { - sway_log(SWAY_DEBUG, "Adding non-wildcard input config"); - i = list_seq_find(config->input_configs, input_identifier_cmp, "*"); - if (i >= 0) { - sway_log(SWAY_DEBUG, "Merging on top of input * config"); - struct input_config *current = new_input_config(ic->identifier); - merge_input_config(current, config->input_configs->items[i]); - merge_input_config(current, ic); - free_input_config(ic); - ic = current; - } + } + + if (!current || new_current) { list_add(config_list, ic); - } else { - // New wildcard config. Just add it - sway_log(SWAY_DEBUG, "Adding input * config"); - list_add(config->input_configs, ic); } sway_log(SWAY_DEBUG, "Config stored for input %s", ic->identifier);