| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <ctype.h> |
| #include <dirent.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <inttypes.h> |
| #include <stdarg.h> |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include "action.h" |
| #include "init.h" |
| #include "init_parser.h" |
| #include "log.h" |
| #include "parser.h" |
| #include "property_service.h" |
| #include "service.h" |
| #include "util.h" |
| |
| #include <base/stringprintf.h> |
| #include <cutils/iosched_policy.h> |
| #include <cutils/list.h> |
| |
| static list_declare(service_list); |
| |
| struct import { |
| struct listnode list; |
| const char *filename; |
| }; |
| |
| static void *parse_service(struct parse_state *state, int nargs, char **args); |
| static void parse_line_service(struct parse_state *state, int nargs, char **args); |
| |
| static void *parse_action(struct parse_state *state, int nargs, char **args); |
| static void parse_line_action(struct parse_state *state, int nargs, char **args); |
| |
| #define SECTION 0x01 |
| #define COMMAND 0x02 |
| #define OPTION 0x04 |
| |
| #include "keywords.h" |
| |
| #define KEYWORD(symbol, flags, nargs, func) \ |
| [ K_##symbol ] = { #symbol, func, nargs + 1, flags, }, |
| |
| static struct { |
| const char *name; |
| int (*func)(const std::vector<std::string>& args); |
| size_t nargs; |
| unsigned char flags; |
| } keyword_info[KEYWORD_COUNT] = { |
| [ K_UNKNOWN ] = { "unknown", 0, 0, 0 }, |
| #include "keywords.h" |
| }; |
| #undef KEYWORD |
| |
| #define kw_is(kw, type) (keyword_info[kw].flags & (type)) |
| #define kw_name(kw) (keyword_info[kw].name) |
| #define kw_func(kw) (keyword_info[kw].func) |
| #define kw_nargs(kw) (keyword_info[kw].nargs) |
| |
| void dump_parser_state() { |
| ServiceManager::GetInstance().DumpState(); |
| ActionManager::GetInstance().DumpState(); |
| } |
| |
| static int lookup_keyword(const char *s) |
| { |
| switch (*s++) { |
| case 'b': |
| if (!strcmp(s, "ootchart_init")) return K_bootchart_init; |
| break; |
| case 'c': |
| if (!strcmp(s, "opy")) return K_copy; |
| if (!strcmp(s, "lass")) return K_class; |
| if (!strcmp(s, "lass_start")) return K_class_start; |
| if (!strcmp(s, "lass_stop")) return K_class_stop; |
| if (!strcmp(s, "lass_reset")) return K_class_reset; |
| if (!strcmp(s, "onsole")) return K_console; |
| if (!strcmp(s, "hown")) return K_chown; |
| if (!strcmp(s, "hmod")) return K_chmod; |
| if (!strcmp(s, "ritical")) return K_critical; |
| break; |
| case 'd': |
| if (!strcmp(s, "isabled")) return K_disabled; |
| if (!strcmp(s, "omainname")) return K_domainname; |
| break; |
| case 'e': |
| if (!strcmp(s, "nable")) return K_enable; |
| if (!strcmp(s, "xec")) return K_exec; |
| if (!strcmp(s, "xport")) return K_export; |
| break; |
| case 'g': |
| if (!strcmp(s, "roup")) return K_group; |
| break; |
| case 'h': |
| if (!strcmp(s, "ostname")) return K_hostname; |
| break; |
| case 'i': |
| if (!strcmp(s, "oprio")) return K_ioprio; |
| if (!strcmp(s, "fup")) return K_ifup; |
| if (!strcmp(s, "nsmod")) return K_insmod; |
| if (!strcmp(s, "mport")) return K_import; |
| if (!strcmp(s, "nstallkey")) return K_installkey; |
| break; |
| case 'k': |
| if (!strcmp(s, "eycodes")) return K_keycodes; |
| break; |
| case 'l': |
| if (!strcmp(s, "oglevel")) return K_loglevel; |
| if (!strcmp(s, "oad_persist_props")) return K_load_persist_props; |
| if (!strcmp(s, "oad_all_props")) return K_load_all_props; |
| break; |
| case 'm': |
| if (!strcmp(s, "kdir")) return K_mkdir; |
| if (!strcmp(s, "ount_all")) return K_mount_all; |
| if (!strcmp(s, "ount")) return K_mount; |
| break; |
| case 'o': |
| if (!strcmp(s, "n")) return K_on; |
| if (!strcmp(s, "neshot")) return K_oneshot; |
| if (!strcmp(s, "nrestart")) return K_onrestart; |
| break; |
| case 'p': |
| if (!strcmp(s, "owerctl")) return K_powerctl; |
| break; |
| case 'r': |
| if (!strcmp(s, "estart")) return K_restart; |
| if (!strcmp(s, "estorecon")) return K_restorecon; |
| if (!strcmp(s, "estorecon_recursive")) return K_restorecon_recursive; |
| if (!strcmp(s, "mdir")) return K_rmdir; |
| if (!strcmp(s, "m")) return K_rm; |
| break; |
| case 's': |
| if (!strcmp(s, "eclabel")) return K_seclabel; |
| if (!strcmp(s, "ervice")) return K_service; |
| if (!strcmp(s, "etenv")) return K_setenv; |
| if (!strcmp(s, "etprop")) return K_setprop; |
| if (!strcmp(s, "etrlimit")) return K_setrlimit; |
| if (!strcmp(s, "ocket")) return K_socket; |
| if (!strcmp(s, "tart")) return K_start; |
| if (!strcmp(s, "top")) return K_stop; |
| if (!strcmp(s, "wapon_all")) return K_swapon_all; |
| if (!strcmp(s, "ymlink")) return K_symlink; |
| if (!strcmp(s, "ysclktz")) return K_sysclktz; |
| break; |
| case 't': |
| if (!strcmp(s, "rigger")) return K_trigger; |
| break; |
| case 'u': |
| if (!strcmp(s, "ser")) return K_user; |
| break; |
| case 'v': |
| if (!strcmp(s, "erity_load_state")) return K_verity_load_state; |
| if (!strcmp(s, "erity_update_state")) return K_verity_update_state; |
| break; |
| case 'w': |
| if (!strcmp(s, "rite")) return K_write; |
| if (!strcmp(s, "ritepid")) return K_writepid; |
| if (!strcmp(s, "ait")) return K_wait; |
| break; |
| } |
| return K_UNKNOWN; |
| } |
| |
| static void parse_line_no_op(struct parse_state*, int, char**) { |
| } |
| |
| int expand_props(const std::string& src, std::string* dst) { |
| const char *src_ptr = src.c_str(); |
| |
| if (!dst) { |
| return -1; |
| } |
| |
| /* - variables can either be $x.y or ${x.y}, in case they are only part |
| * of the string. |
| * - will accept $$ as a literal $. |
| * - no nested property expansion, i.e. ${foo.${bar}} is not supported, |
| * bad things will happen |
| */ |
| while (*src_ptr) { |
| const char *c; |
| |
| c = strchr(src_ptr, '$'); |
| if (!c) { |
| dst->append(src_ptr); |
| break; |
| } |
| |
| dst->append(src_ptr, c); |
| c++; |
| |
| if (*c == '$') { |
| dst->push_back(*(c++)); |
| src_ptr = c; |
| continue; |
| } else if (*c == '\0') { |
| break; |
| } |
| |
| std::string prop_name; |
| if (*c == '{') { |
| c++; |
| const char* end = strchr(c, '}'); |
| if (!end) { |
| // failed to find closing brace, abort. |
| ERROR("unexpected end of string in '%s', looking for }\n", src.c_str()); |
| goto err; |
| } |
| prop_name = std::string(c, end); |
| c = end + 1; |
| } else { |
| prop_name = c; |
| ERROR("using deprecated syntax for specifying property '%s', use ${name} instead\n", |
| c); |
| c += prop_name.size(); |
| } |
| |
| if (prop_name.empty()) { |
| ERROR("invalid zero-length prop name in '%s'\n", src.c_str()); |
| goto err; |
| } |
| |
| std::string prop_val = property_get(prop_name.c_str()); |
| if (prop_val.empty()) { |
| ERROR("property '%s' doesn't exist while expanding '%s'\n", |
| prop_name.c_str(), src.c_str()); |
| goto err; |
| } |
| |
| dst->append(prop_val); |
| src_ptr = c; |
| continue; |
| } |
| |
| return 0; |
| err: |
| return -1; |
| } |
| |
| static void parse_import(struct parse_state *state, int nargs, char **args) |
| { |
| if (nargs != 2) { |
| ERROR("single argument needed for import\n"); |
| return; |
| } |
| |
| std::string conf_file; |
| int ret = expand_props(args[1], &conf_file); |
| if (ret) { |
| ERROR("error while handling import on line '%d' in '%s'\n", |
| state->line, state->filename); |
| return; |
| } |
| |
| struct import* import = (struct import*) calloc(1, sizeof(struct import)); |
| import->filename = strdup(conf_file.c_str()); |
| |
| struct listnode *import_list = (listnode*) state->priv; |
| list_add_tail(import_list, &import->list); |
| INFO("Added '%s' to import list\n", import->filename); |
| } |
| |
| static void parse_new_section(struct parse_state *state, int kw, |
| int nargs, char **args) |
| { |
| printf("[ %s %s ]\n", args[0], |
| nargs > 1 ? args[1] : ""); |
| switch(kw) { |
| case K_service: |
| state->context = parse_service(state, nargs, args); |
| if (state->context) { |
| state->parse_line = parse_line_service; |
| return; |
| } |
| break; |
| case K_on: |
| state->context = parse_action(state, nargs, args); |
| if (state->context) { |
| state->parse_line = parse_line_action; |
| return; |
| } |
| break; |
| case K_import: |
| parse_import(state, nargs, args); |
| break; |
| } |
| state->parse_line = parse_line_no_op; |
| } |
| |
| static void parse_config(const char *fn, const std::string& data) |
| { |
| struct listnode import_list; |
| struct listnode *node; |
| char *args[INIT_PARSER_MAXARGS]; |
| |
| int nargs = 0; |
| |
| //TODO: Use a parser with const input and remove this copy |
| std::vector<char> data_copy(data.begin(), data.end()); |
| data_copy.push_back('\0'); |
| |
| parse_state state; |
| state.filename = fn; |
| state.line = 0; |
| state.ptr = &data_copy[0]; |
| state.nexttoken = 0; |
| state.parse_line = parse_line_no_op; |
| |
| list_init(&import_list); |
| state.priv = &import_list; |
| |
| for (;;) { |
| switch (next_token(&state)) { |
| case T_EOF: |
| state.parse_line(&state, 0, 0); |
| goto parser_done; |
| case T_NEWLINE: |
| state.line++; |
| if (nargs) { |
| int kw = lookup_keyword(args[0]); |
| if (kw_is(kw, SECTION)) { |
| state.parse_line(&state, 0, 0); |
| parse_new_section(&state, kw, nargs, args); |
| } else { |
| state.parse_line(&state, nargs, args); |
| } |
| nargs = 0; |
| } |
| break; |
| case T_TEXT: |
| if (nargs < INIT_PARSER_MAXARGS) { |
| args[nargs++] = state.text; |
| } |
| break; |
| } |
| } |
| |
| parser_done: |
| list_for_each(node, &import_list) { |
| struct import* import = node_to_item(node, struct import, list); |
| if (!init_parse_config(import->filename)) { |
| ERROR("could not import file '%s' from '%s': %s\n", |
| import->filename, fn, strerror(errno)); |
| } |
| } |
| } |
| |
| static bool init_parse_config_file(const char* path) { |
| INFO("Parsing file %s...\n", path); |
| Timer t; |
| std::string data; |
| if (!read_file(path, &data)) { |
| return false; |
| } |
| |
| data.push_back('\n'); // TODO: fix parse_config. |
| parse_config(path, data); |
| dump_parser_state(); |
| |
| NOTICE("(Parsing %s took %.2fs.)\n", path, t.duration()); |
| return true; |
| } |
| |
| static bool init_parse_config_dir(const char* path) { |
| INFO("Parsing directory %s...\n", path); |
| std::unique_ptr<DIR, int(*)(DIR*)> config_dir(opendir(path), closedir); |
| if (!config_dir) { |
| ERROR("Could not import directory '%s'\n", path); |
| return false; |
| } |
| dirent* current_file; |
| while ((current_file = readdir(config_dir.get()))) { |
| std::string current_path = |
| android::base::StringPrintf("%s/%s", path, current_file->d_name); |
| // Ignore directories and only process regular files. |
| if (current_file->d_type == DT_REG) { |
| if (!init_parse_config_file(current_path.c_str())) { |
| ERROR("could not import file '%s'\n", current_path.c_str()); |
| } |
| } |
| } |
| return true; |
| } |
| |
| bool init_parse_config(const char* path) { |
| if (is_dir(path)) { |
| return init_parse_config_dir(path); |
| } |
| return init_parse_config_file(path); |
| } |
| |
| static void *parse_service(struct parse_state *state, int nargs, char **args) |
| { |
| if (nargs < 3) { |
| parse_error(state, "services must have a name and a program\n"); |
| return nullptr; |
| } |
| std::vector<std::string> str_args(args + 2, args + nargs); |
| std::string ret_err; |
| Service* svc = ServiceManager::GetInstance().AddNewService(args[1], "default", |
| str_args, &ret_err); |
| |
| if (!svc) { |
| parse_error(state, "%s\n", ret_err.c_str()); |
| } |
| |
| return svc; |
| } |
| |
| static void parse_line_service(struct parse_state *state, int nargs, char **args) |
| { |
| if (nargs == 0) { |
| return; |
| } |
| |
| Service* svc = static_cast<Service*>(state->context); |
| int kw = lookup_keyword(args[0]); |
| std::vector<std::string> str_args(args, args + nargs); |
| std::string ret_err; |
| bool ret = svc->HandleLine(kw, str_args, &ret_err); |
| |
| if (!ret) { |
| parse_error(state, "%s\n", ret_err.c_str()); |
| } |
| } |
| |
| static void *parse_action(struct parse_state* state, int nargs, char **args) |
| { |
| std::string ret_err; |
| std::vector<std::string> triggers(args + 1, args + nargs); |
| Action* ret = ActionManager::GetInstance().AddNewAction(triggers, &ret_err); |
| |
| if (!ret) { |
| parse_error(state, "%s\n", ret_err.c_str()); |
| } |
| |
| return ret; |
| } |
| |
| bool add_command_to_action(Action* action, const std::vector<std::string>& args, |
| const std::string& filename, int line, std::string* err) |
| { |
| int kw; |
| size_t n; |
| |
| kw = lookup_keyword(args[0].c_str()); |
| if (!kw_is(kw, COMMAND)) { |
| *err = android::base::StringPrintf("invalid command '%s'\n", args[0].c_str()); |
| return false; |
| } |
| |
| n = kw_nargs(kw); |
| if (args.size() < n) { |
| *err = android::base::StringPrintf("%s requires %zu %s\n", |
| args[0].c_str(), n - 1, |
| n > 2 ? "arguments" : "argument"); |
| return false; |
| } |
| |
| action->AddCommand(kw_func(kw), args, filename, line); |
| return true; |
| } |
| |
| static void parse_line_action(struct parse_state* state, int nargs, char **args) |
| { |
| if (nargs == 0) { |
| return; |
| } |
| |
| Action* action = static_cast<Action*>(state->context); |
| std::vector<std::string> str_args(args, args + nargs); |
| std::string ret_err; |
| bool ret = add_command_to_action(action, str_args, state->filename, |
| state->line, &ret_err); |
| if (!ret) { |
| parse_error(state, "%s\n", ret_err.c_str()); |
| } |
| } |
