Mercurial > dovecot > core-2.2
view src/lib-master/master-service-settings.c @ 9877:3de6af0eb499 HEAD
lib-master: Don't assert-crash if process gets a signal while reading config.
author | Timo Sirainen <tss@iki.fi> |
---|---|
date | Fri, 04 Sep 2009 17:14:47 -0400 |
parents | 1d2d0aa8e313 |
children | 80472a77d765 |
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/* Copyright (c) 2005-2009 Dovecot authors, see the included COPYING file */ #include "lib.h" #include "array.h" #include "istream.h" #include "write-full.h" #include "str.h" #include "settings-parser.h" #include "master-service-private.h" #include "master-service-settings.h" #include <stddef.h> #include <stdlib.h> #include <unistd.h> #include <sys/stat.h> #define DOVECOT_CONFIG_BIN_PATH BINDIR"/doveconf" #define CONFIG_HANDSHAKE "VERSION\tconfig\t1\t0\n" #undef DEF #define DEF(type, name) \ { type, #name, offsetof(struct master_service_settings, name), NULL } static struct setting_define master_service_setting_defines[] = { DEF(SET_STR, log_path), DEF(SET_STR, info_log_path), DEF(SET_STR, log_timestamp), DEF(SET_STR, syslog_facility), DEF(SET_BOOL, version_ignore), SETTING_DEFINE_LIST_END }; static struct master_service_settings master_service_default_settings = { MEMBER(log_path) "", MEMBER(info_log_path) "", MEMBER(log_timestamp) DEFAULT_FAILURE_STAMP_FORMAT, MEMBER(syslog_facility) "mail", MEMBER(version_ignore) FALSE }; struct setting_parser_info master_service_setting_parser_info = { MEMBER(defines) master_service_setting_defines, MEMBER(defaults) &master_service_default_settings, MEMBER(parent) NULL, MEMBER(dynamic_parsers) NULL, MEMBER(parent_offset) (size_t)-1, MEMBER(type_offset) (size_t)-1, MEMBER(struct_size) sizeof(struct master_service_settings) }; static void ATTR_NORETURN master_service_exec_config(struct master_service *service, bool preserve_home) { const char **conf_argv, *path, *const *paths, *binary_path; char full_path[PATH_MAX]; binary_path = service->argv[0]; if (*service->argv[0] == '/') { /* already have the path */ } else if (strchr(service->argv[0], '/') != NULL) { /* relative to current directory */ if (realpath(service->argv[0], full_path) == NULL) i_fatal("realpath(%s) failed: %m", service->argv[0]); binary_path = full_path; } else if ((path = getenv("PATH")) != NULL) { /* we have to find our executable from path */ paths = t_strsplit(path, ":"); for (; *paths != NULL; paths++) { path = t_strconcat(*paths, "/", binary_path, NULL); if (access(path, X_OK) == 0) { binary_path = path; break; } } } if (!service->keep_environment) master_service_env_clean(preserve_home); /* @UNSAFE */ conf_argv = t_new(const char *, 6 + (service->argc + 1) + 1); conf_argv[0] = DOVECOT_CONFIG_BIN_PATH; conf_argv[1] = "-f"; conf_argv[2] = t_strconcat("service=", service->name, NULL); conf_argv[3] = "-c"; conf_argv[4] = service->config_path; conf_argv[5] = "-e"; conf_argv[6] = binary_path; memcpy(conf_argv+7, service->argv + 1, (service->argc) * sizeof(conf_argv[0])); execv(conf_argv[0], (char **)conf_argv); i_fatal("execv(%s) failed: %m", conf_argv[0]); } static int master_service_read_config(struct master_service *service, const char *path, const struct master_service_settings_input *input, const char **error_r) { struct stat st; int fd, ret; if (service->config_fd != -1) { fd = service->config_fd; service->config_fd = -1; } else { fd = net_connect_unix(path); if (fd < 0) { *error_r = t_strdup_printf( "net_connect_unix(%s) failed: %m", path); if (stat(path, &st) == 0 && !S_ISFIFO(st.st_mode)) { /* it's a file, not a socket */ master_service_exec_config(service, input->preserve_home); } return -1; } net_set_nonblock(fd, FALSE); } T_BEGIN { string_t *str; str = t_str_new(128); str_append(str, CONFIG_HANDSHAKE"REQ"); if (input->module != NULL) str_printfa(str, "\tmodule=%s", input->module); if (input->service != NULL) str_printfa(str, "\tservice=%s", input->service); if (input->username != NULL) str_printfa(str, "\tuser=%s", input->username); if (input->local_ip.family != 0) { str_printfa(str, "\tlip=%s", net_ip2addr(&input->local_ip)); } if (input->remote_ip.family != 0) { str_printfa(str, "\trip=%s", net_ip2addr(&input->remote_ip)); } str_append_c(str, '\n'); ret = write_full(fd, str_data(str), str_len(str)); } T_END; if (ret < 0) { *error_r = t_strdup_printf("write_full(%s) failed: %m", path); return -1; } return fd; } static int master_service_apply_config_overrides(struct master_service *service, struct setting_parser_context *parser, const char **error_r) { const char *const *overrides; unsigned int i, count; overrides = array_get(&service->config_overrides, &count); for (i = 0; i < count; i++) { if (settings_parse_line(parser, overrides[i]) < 0) { *error_r = t_strdup_printf( "Invalid -o parameter %s: %s", overrides[i], settings_parser_get_error(parser)); return -1; } settings_parse_set_key_expandeded(parser, service->set_pool, t_strcut(overrides[i], '=')); } return 0; } int master_service_settings_read(struct master_service *service, const struct master_service_settings_input *input, const char **error_r) { ARRAY_DEFINE(all_roots, const struct setting_parser_info *); const struct setting_parser_info *tmp_root; struct setting_parser_context *parser; struct istream *istream; const char *path, *error, *env, *const *keys; void **sets; unsigned int i; int ret, fd = -1; if (getenv("DOVECONF_ENV") == NULL && !service->default_settings) { path = input->config_path != NULL ? input->config_path : master_service_get_config_path(service); fd = master_service_read_config(service, path, input, error_r); if (fd == -1) return -1; } if (service->set_pool != NULL) { if (service->set_parser != NULL) settings_parser_deinit(&service->set_parser); p_clear(service->set_pool); } else { service->set_pool = pool_alloconly_create("master service settings", 8192); } if (input->dyn_parsers != NULL) { settings_parser_info_update(service->set_pool, input->dyn_parsers); } p_array_init(&all_roots, service->set_pool, 8); tmp_root = &master_service_setting_parser_info; array_append(&all_roots, &tmp_root, 1); if (input->roots != NULL) { for (i = 0; input->roots[i] != NULL; i++) array_append(&all_roots, &input->roots[i], 1); } parser = settings_parser_init_list(service->set_pool, array_idx(&all_roots, 0), array_count(&all_roots), SETTINGS_PARSER_FLAG_IGNORE_UNKNOWN_KEYS); if (fd != -1) { istream = i_stream_create_fd(fd, (size_t)-1, FALSE); istream->blocking = TRUE; /* fd is blocking */ ret = settings_parse_stream_read(parser, istream); i_stream_unref(&istream); i_assert(ret <= 0); if (ret < 0) { *error_r = settings_parser_get_error(parser); (void)close(fd); return -1; } } if ((service->flags & MASTER_SERVICE_FLAG_KEEP_CONFIG_OPEN) != 0) service->config_fd = fd; else if (fd != -1) (void)close(fd); /* let environment override settings. especially useful for the settings from userdb. */ if (settings_parse_environ(parser) < 0) { *error_r = settings_parser_get_error(parser); return -1; } env = getenv("VARS_EXPANDED"); if (env != NULL) T_BEGIN { keys = t_strsplit(env, " "); settings_parse_set_keys_expandeded(parser, service->set_pool, keys); } T_END; if (array_is_created(&service->config_overrides)) { if (master_service_apply_config_overrides(service, parser, error_r) < 0) return -1; } if (!settings_parser_check(parser, service->set_pool, &error)) { *error_r = t_strdup_printf("Invalid settings: %s", error); return -1; } sets = settings_parser_get_list(parser); service->set = sets[0]; service->set_parser = parser; if (service->set->version_ignore && (service->flags & MASTER_SERVICE_FLAG_STANDALONE) != 0) { /* running standalone. we want to ignore plugin versions. */ service->version_string = NULL; } /* if we change any settings afterwards, they're in expanded form. especially all settings from userdb are already expanded. */ settings_parse_set_expanded(service->set_parser, TRUE); return 0; } int master_service_settings_read_simple(struct master_service *service, const struct setting_parser_info **roots, const char **error_r) { struct master_service_settings_input input; memset(&input, 0, sizeof(input)); input.roots = roots; input.module = service->name; return master_service_settings_read(service, &input, error_r); } pool_t master_service_settings_detach(struct master_service *service) { pool_t pool = service->set_pool; settings_parser_deinit(&service->set_parser); service->set_pool = NULL; return pool; } const struct master_service_settings * master_service_settings_get(struct master_service *service) { void **sets; sets = settings_parser_get_list(service->set_parser); return sets[0]; } void **master_service_settings_get_others(struct master_service *service) { return settings_parser_get_list(service->set_parser) + 1; } int master_service_set(struct master_service *service, const char *line) { return settings_parse_line(service->set_parser, line); }