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#define _XOPEN_SOURCE 500
#include <ctype.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <stdio.h>
#include <json-c/json.h>
#include "sway/commands.h"
#include "sway/config.h"
#include "sway/security.h"
#include "sway/input/input-manager.h"
#include "stringop.h"
#include "log.h"
struct cmd_handler {
char *command;
sway_cmd *handle;
};
// Returns error object, or NULL if check succeeds.
struct cmd_results *checkarg(int argc, const char *name, enum expected_args type, int val) {
struct cmd_results *error = NULL;
switch (type) {
case EXPECTED_MORE_THAN:
if (argc > val) {
return NULL;
}
error = cmd_results_new(CMD_INVALID, name, "Invalid %s command "
"(expected more than %d argument%s, got %d)",
name, val, (char*[2]){"s", ""}[argc==1], argc);
break;
case EXPECTED_AT_LEAST:
if (argc >= val) {
return NULL;
}
error = cmd_results_new(CMD_INVALID, name, "Invalid %s command "
"(expected at least %d argument%s, got %d)",
name, val, (char*[2]){"s", ""}[argc==1], argc);
break;
case EXPECTED_LESS_THAN:
if (argc < val) {
return NULL;
};
error = cmd_results_new(CMD_INVALID, name, "Invalid %s command "
"(expected less than %d argument%s, got %d)",
name, val, (char*[2]){"s", ""}[argc==1], argc);
break;
case EXPECTED_EQUAL_TO:
if (argc == val) {
return NULL;
};
error = cmd_results_new(CMD_INVALID, name, "Invalid %s command "
"(expected %d arguments, got %d)", name, val, argc);
break;
}
return error;
}
void input_cmd_apply(struct input_config *input) {
int i;
i = list_seq_find(config->input_configs, input_identifier_cmp, input->identifier);
if (i >= 0) {
// merge existing config
struct input_config *ic = config->input_configs->items[i];
merge_input_config(ic, input);
free_input_config(input);
input = ic;
} else {
list_add(config->input_configs, input);
}
current_input_config = input;
sway_input_manager_apply_config(input_manager, input);
}
/**
* Check and add color to buffer.
*
* return error object, or NULL if color is valid.
*/
struct cmd_results *add_color(const char *name, char *buffer, const char *color) {
int len = strlen(color);
if (len != 7 && len != 9) {
return cmd_results_new(CMD_INVALID, name, "Invalid color definition %s", color);
}
if (color[0] != '#') {
return cmd_results_new(CMD_INVALID, name, "Invalid color definition %s", color);
}
int i;
for (i = 1; i < len; ++i) {
if (!isxdigit(color[i])) {
return cmd_results_new(CMD_INVALID, name, "Invalid color definition %s", color);
}
}
// copy color to buffer
strncpy(buffer, color, len);
// add default alpha channel if color was defined without it
if (len == 7) {
buffer[7] = 'f';
buffer[8] = 'f';
}
buffer[9] = '\0';
return NULL;
}
/* Keep alphabetized */
static struct cmd_handler handlers[] = {
{ "exec", cmd_exec },
{ "exec_always", cmd_exec_always },
{ "exit", cmd_exit },
{ "include", cmd_include },
{ "input", cmd_input },
};
static int handler_compare(const void *_a, const void *_b) {
const struct cmd_handler *a = _a;
const struct cmd_handler *b = _b;
return strcasecmp(a->command, b->command);
}
// must be in order for the bsearch
static struct cmd_handler input_handlers[] = {
{ "accel_profile", input_cmd_accel_profile },
{ "click_method", input_cmd_click_method },
{ "drag_lock", input_cmd_drag_lock },
{ "dwt", input_cmd_dwt },
{ "events", input_cmd_events },
{ "left_handed", input_cmd_left_handed },
{ "middle_emulation", input_cmd_middle_emulation },
{ "natural_scroll", input_cmd_natural_scroll },
{ "pointer_accel", input_cmd_pointer_accel },
{ "scroll_method", input_cmd_scroll_method },
{ "seat", input_cmd_seat },
{ "tap", input_cmd_tap },
};
static struct cmd_handler *find_handler(char *line, enum cmd_status block) {
struct cmd_handler d = { .command=line };
struct cmd_handler *res = NULL;
sway_log(L_DEBUG, "find_handler(%s) %d", line, block == CMD_BLOCK_INPUT);
if (block == CMD_BLOCK_INPUT) {
res = bsearch(&d, input_handlers,
sizeof(input_handlers) / sizeof(struct cmd_handler),
sizeof(struct cmd_handler), handler_compare);
} else {
res = bsearch(&d, handlers,
sizeof(handlers) / sizeof(struct cmd_handler),
sizeof(struct cmd_handler), handler_compare);
}
return res;
}
struct cmd_results *handle_command(char *_exec) {
// Even though this function will process multiple commands we will only
// return the last error, if any (for now). (Since we have access to an
// error string we could e.g. concatonate all errors there.)
struct cmd_results *results = NULL;
char *exec = strdup(_exec);
char *head = exec;
char *cmdlist;
char *cmd;
head = exec;
do {
// Split command list
cmdlist = argsep(&head, ";");
cmdlist += strspn(cmdlist, whitespace);
do {
// Split commands
cmd = argsep(&cmdlist, ",");
cmd += strspn(cmd, whitespace);
if (strcmp(cmd, "") == 0) {
sway_log(L_INFO, "Ignoring empty command.");
continue;
}
sway_log(L_INFO, "Handling command '%s'", cmd);
//TODO better handling of argv
int argc;
char **argv = split_args(cmd, &argc);
if (strcmp(argv[0], "exec") != 0) {
int i;
for (i = 1; i < argc; ++i) {
if (*argv[i] == '\"' || *argv[i] == '\'') {
strip_quotes(argv[i]);
}
}
}
struct cmd_handler *handler = find_handler(argv[0], CMD_BLOCK_END);
if (!handler) {
if (results) {
free_cmd_results(results);
}
results = cmd_results_new(CMD_INVALID, cmd, "Unknown/invalid command");
free_argv(argc, argv);
goto cleanup;
}
struct cmd_results *res = handler->handle(argc-1, argv+1);
if (res->status != CMD_SUCCESS) {
free_argv(argc, argv);
if (results) {
free_cmd_results(results);
}
results = res;
goto cleanup;
}
free_cmd_results(res);
free_argv(argc, argv);
} while(cmdlist);
} while(head);
cleanup:
free(exec);
if (!results) {
results = cmd_results_new(CMD_SUCCESS, NULL, NULL);
}
return results;
}
// this is like handle_command above, except:
// 1) it ignores empty commands (empty lines)
// 2) it does variable substitution
// 3) it doesn't split commands (because the multiple commands are supposed to
// be chained together)
// 4) handle_command handles all state internally while config_command has some
// state handled outside (notably the block mode, in read_config)
struct cmd_results *config_command(char *exec, enum cmd_status block) {
struct cmd_results *results = NULL;
int argc;
char **argv = split_args(exec, &argc);
if (!argc) {
results = cmd_results_new(CMD_SUCCESS, NULL, NULL);
goto cleanup;
}
sway_log(L_INFO, "handling config command '%s'", exec);
// Endblock
if (**argv == '}') {
results = cmd_results_new(CMD_BLOCK_END, NULL, NULL);
goto cleanup;
}
struct cmd_handler *handler = find_handler(argv[0], block);
if (!handler) {
char *input = argv[0] ? argv[0] : "(empty)";
results = cmd_results_new(CMD_INVALID, input, "Unknown/invalid command");
goto cleanup;
}
int i;
// Var replacement, for all but first argument of set
// TODO commands
for (i = /*handler->handle == cmd_set ? 2 :*/ 1; i < argc; ++i) {
argv[i] = do_var_replacement(argv[i]);
unescape_string(argv[i]);
}
// Strip quotes for first argument.
// TODO This part needs to be handled much better
if (argc>1 && (*argv[1] == '\"' || *argv[1] == '\'')) {
strip_quotes(argv[1]);
}
if (handler->handle) {
results = handler->handle(argc-1, argv+1);
} else {
results = cmd_results_new(CMD_INVALID, argv[0], "This command is shimmed, but unimplemented");
}
cleanup:
free_argv(argc, argv);
return results;
}
struct cmd_results *config_commands_command(char *exec) {
struct cmd_results *results = NULL;
int argc;
char **argv = split_args(exec, &argc);
if (!argc) {
results = cmd_results_new(CMD_SUCCESS, NULL, NULL);
goto cleanup;
}
// Find handler for the command this is setting a policy for
char *cmd = argv[0];
if (strcmp(cmd, "}") == 0) {
results = cmd_results_new(CMD_BLOCK_END, NULL, NULL);
goto cleanup;
}
struct cmd_handler *handler = find_handler(cmd, CMD_BLOCK_END);
if (!handler && strcmp(cmd, "*") != 0) {
char *input = cmd ? cmd : "(empty)";
results = cmd_results_new(CMD_INVALID, input, "Unknown/invalid command");
goto cleanup;
}
enum command_context context = 0;
struct {
char *name;
enum command_context context;
} context_names[] = {
{ "config", CONTEXT_CONFIG },
{ "binding", CONTEXT_BINDING },
{ "ipc", CONTEXT_IPC },
{ "criteria", CONTEXT_CRITERIA },
{ "all", CONTEXT_ALL },
};
for (int i = 1; i < argc; ++i) {
size_t j;
for (j = 0; j < sizeof(context_names) / sizeof(context_names[0]); ++j) {
if (strcmp(context_names[j].name, argv[i]) == 0) {
break;
}
}
if (j == sizeof(context_names) / sizeof(context_names[0])) {
results = cmd_results_new(CMD_INVALID, cmd,
"Invalid command context %s", argv[i]);
goto cleanup;
}
context |= context_names[j].context;
}
struct command_policy *policy = NULL;
for (int i = 0; i < config->command_policies->length; ++i) {
struct command_policy *p = config->command_policies->items[i];
if (strcmp(p->command, cmd) == 0) {
policy = p;
break;
}
}
if (!policy) {
policy = alloc_command_policy(cmd);
sway_assert(policy, "Unable to allocate security policy");
if (policy) {
list_add(config->command_policies, policy);
}
}
policy->context = context;
sway_log(L_INFO, "Set command policy for %s to %d",
policy->command, policy->context);
results = cmd_results_new(CMD_SUCCESS, NULL, NULL);
cleanup:
free_argv(argc, argv);
return results;
}
struct cmd_results *cmd_results_new(enum cmd_status status,
const char *input, const char *format, ...) {
struct cmd_results *results = malloc(sizeof(struct cmd_results));
if (!results) {
sway_log(L_ERROR, "Unable to allocate command results");
return NULL;
}
results->status = status;
if (input) {
results->input = strdup(input); // input is the command name
} else {
results->input = NULL;
}
if (format) {
char *error = malloc(256);
va_list args;
va_start(args, format);
if (error) {
vsnprintf(error, 256, format, args);
}
va_end(args);
results->error = error;
} else {
results->error = NULL;
}
return results;
}
void free_cmd_results(struct cmd_results *results) {
if (results->input) {
free(results->input);
}
if (results->error) {
free(results->error);
}
free(results);
}
const char *cmd_results_to_json(struct cmd_results *results) {
json_object *result_array = json_object_new_array();
json_object *root = json_object_new_object();
json_object_object_add(root, "success",
json_object_new_boolean(results->status == CMD_SUCCESS));
if (results->input) {
json_object_object_add(
root, "input", json_object_new_string(results->input));
}
if (results->error) {
json_object_object_add(
root, "error", json_object_new_string(results->error));
}
json_object_array_add(result_array, root);
const char *json = json_object_to_json_string(result_array);
free(result_array);
free(root);
return json;
}
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