--- lbbs/src/menu.c 2025/05/19 02:18:39 1.50 +++ lbbs/src/menu.c 2025/11/05 04:19:21 1.84 @@ -1,44 +1,40 @@ -/*************************************************************************** - menu.c - description - ------------------- - Copyright : (C) 2004-2025 by Leaflet - Email : leaflet@leafok.com - ***************************************************************************/ - -/*************************************************************************** - * * - * This program is free software; you can redistribute it and/or modify * - * it under the terms of the GNU General Public License as published by * - * the Free Software Foundation; either version 3 of the License, or * - * (at your option) any later version. * - * * - ***************************************************************************/ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +/* + * menu + * - configurable user interactive menu feature + * + * Copyright (C) 2004-2025 Leaflet + */ #include "bbs.h" #include "bbs_cmd.h" -#include "user_priv.h" #include "bbs_cmd.h" -#include "menu.h" -#include "log.h" +#include "common.h" #include "io.h" +#include "log.h" +#include "menu.h" #include "screen.h" -#include "common.h" -#include -#include +#include "user_priv.h" #include -#include #include +#include +#include +#include #include -#include #include +#include -#define MENU_SCREEN_PATH_PREFIX "var/MENU_SCR_" -#define MENU_CONF_DELIM_WITH_SPACE " ,\t\r\n" -#define MENU_CONF_DELIM_WITHOUT_SPACE "\r\n" +enum _menu_constant_t +{ + MENU_SET_RESERVED_LENGTH = sizeof(int16_t) * 4, + MENU_SHMGET_RETRY_LIMIT = 10, +}; -#define MENU_SET_RESERVED_LENGTH (sizeof(int16_t) * 4) +static const char MENU_CONF_DELIM_WITH_SPACE[] = " ,\t\r\n"; +static const char MENU_CONF_DELIM_WITHOUT_SPACE[] = "\r\n"; -MENU_SET *p_bbs_menu; +MENU_SET bbs_menu; +MENU_SET top10_menu; int load_menu(MENU_SET *p_menu_set, const char *conf_file) { @@ -59,6 +55,10 @@ int load_menu(MENU_SET *p_menu_set, cons int proj_id; key_t key; size_t size; + int retry_cnt; + + // Initialize the data structure + memset(p_menu_set, 0, sizeof(*p_menu_set)); // Use trie_dict to search menu_id by menu name p_menu_set->p_menu_name_dict = trie_dict_create(); @@ -78,40 +78,55 @@ int load_menu(MENU_SET *p_menu_set, cons if ((fin = fopen(conf_file, "r")) == NULL) { - log_error("Open %s failed", conf_file); + log_error("Open %s failed\n", conf_file); return -2; } // Allocate shared memory - proj_id = (int)(time(NULL) % getpid()); - key = ftok(conf_file, proj_id); - if (key == -1) - { - log_error("ftok(%s %d) error (%d)\n", conf_file, proj_id, errno); - return -2; - } - size = MENU_SET_RESERVED_LENGTH + sizeof(MENU) * MAX_MENUS + sizeof(MENU_ITEM) * MAX_MENUITEMS + sizeof(MENU_SCREEN) * MAX_MENUS + MAX_MENU_SCR_BUF_LENGTH * MAX_MENUS; - p_menu_set->shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); - if (p_menu_set->shmid == -1) + + proj_id = (int)(time(NULL) % getpid()); + retry_cnt = 0; + + do { - log_error("shmget(size = %d) error (%d)\n", size, errno); - return -3; - } + key = ftok(conf_file, proj_id + retry_cnt); + if (key == -1) + { + log_error("ftok(%s %d) error (%d)\n", conf_file, proj_id + retry_cnt, errno); + return -3; + } + + p_menu_set->shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); + if (p_menu_set->shmid == -1) + { + if (errno != EEXIST || retry_cnt + 1 >= MENU_SHMGET_RETRY_LIMIT) + { + log_error("shmget(conf_file=%s, size=%d) error (%d) %d times\n", + conf_file, size, errno, retry_cnt + 1); + return -3; + } + log_error("shmget(conf_file=%s, proj_id=%d, key=0x%x, size=%d) error (%d), retry ...\n", + conf_file, proj_id + retry_cnt, key, size, errno); + retry_cnt++; + } + } while (p_menu_set->shmid == -1); + p_menu_set->p_reserved = shmat(p_menu_set->shmid, NULL, 0); if (p_menu_set->p_reserved == (void *)-1) { log_error("shmat() error (%d)\n", errno); return -3; } - p_menu_set->p_menu_pool = p_menu_set->p_reserved + MENU_SET_RESERVED_LENGTH; - p_menu_set->p_menu_item_pool = p_menu_set->p_menu_pool + sizeof(MENU) * MAX_MENUS; - p_menu_set->p_menu_screen_pool = p_menu_set->p_menu_item_pool + sizeof(MENU_ITEM) * MAX_MENUITEMS; - p_menu_set->p_menu_screen_buf = p_menu_set->p_menu_screen_pool + sizeof(MENU_SCREEN) * MAX_MENUS; + + p_menu_set->p_menu_pool = (char *)(p_menu_set->p_reserved) + MENU_SET_RESERVED_LENGTH; + p_menu_set->p_menu_item_pool = (char *)(p_menu_set->p_menu_pool) + sizeof(MENU) * MAX_MENUS; + p_menu_set->p_menu_screen_pool = (char *)(p_menu_set->p_menu_item_pool) + sizeof(MENU_ITEM) * MAX_MENUITEMS; + p_menu_set->p_menu_screen_buf = (char *)(p_menu_set->p_menu_screen_pool) + sizeof(MENU_SCREEN) * MAX_MENUS; p_menu_set->p_menu_screen_buf_free = p_menu_set->p_menu_screen_buf; p_menu_set->menu_count = 0; @@ -119,6 +134,8 @@ int load_menu(MENU_SET *p_menu_set, cons p_menu_set->menu_screen_count = 0; p_menu_set->choose_step = 0; p_menu_set->menu_id_path[0] = 0; + p_menu_set->menu_item_pos[0] = 0; + p_menu_set->allow_exit = 0; while (fgets(buffer, sizeof(buffer), fin)) { @@ -160,6 +177,9 @@ int load_menu(MENU_SET *p_menu_set, cons p_menu->item_count = 0; p_menu->title.show = 0; p_menu->screen_show = 0; + p_menu->page_item_limit = 0; + p_menu->use_filter = 0; + p_menu->filter_handler = NULL; q = strtok_r(NULL, MENU_CONF_DELIM_WITH_SPACE, &saveptr); if (q == NULL) @@ -585,6 +605,85 @@ int load_menu(MENU_SET *p_menu_set, cons return -1; } } + else if (strcmp(p, "page") == 0) + { + // Menu page row + q = strtok_r(NULL, MENU_CONF_DELIM_WITH_SPACE, &saveptr); + if (q == NULL) + { + log_error("Error menu page row in menu config line %d\n", fin_line); + return -1; + } + p = q; + while (isdigit(*q)) + { + q++; + } + if (*q != '\0') + { + log_error("Error menu page row in menu config line %d\n", fin_line); + return -1; + } + p_menu->page_row = (int16_t)atoi(p); + + // Menu page col + q = strtok_r(NULL, MENU_CONF_DELIM_WITH_SPACE, &saveptr); + if (q == NULL) + { + log_error("Error menu page col in menu config line %d\n", fin_line); + return -1; + } + p = q; + while (isdigit(*q)) + { + q++; + } + if (*q != '\0') + { + log_error("Error menu page col in menu config line %d\n", fin_line); + return -1; + } + p_menu->page_col = (int16_t)atoi(p); + + // Menu page item limit + q = strtok_r(NULL, MENU_CONF_DELIM_WITH_SPACE, &saveptr); + if (q == NULL) + { + log_error("Error menu page item limit in menu config line %d\n", fin_line); + return -1; + } + p = q; + while (isdigit(*q)) + { + q++; + } + if (*q != '\0') + { + log_error("Error menu page item limit in menu config line %d\n", fin_line); + return -1; + } + p_menu->page_item_limit = (int16_t)atoi(p); + + // Check syntax + q = strtok_r(NULL, MENU_CONF_DELIM_WITH_SPACE, &saveptr); + if (q != NULL) + { + log_error("Unknown extra content in menu config line %d\n", fin_line); + return -1; + } + } + else if (strcmp(p, "use_filter") == 0) + { + p_menu->use_filter = 1; + + // Check syntax + q = strtok_r(NULL, MENU_CONF_DELIM_WITH_SPACE, &saveptr); + if (q != NULL) + { + log_error("Unknown extra content in menu config line %d\n", fin_line); + return -1; + } + } } } else // BEGIN of menu screen @@ -704,6 +803,16 @@ int load_menu(MENU_SET *p_menu_set, cons log_error("Undefined menu screen [%s]\n", p); return -1; } + + // Set menu->filter_handler of each menu pointing to filter + if (p_menu->use_filter == 1) + { + if ((p_menu->filter_handler = get_cmd_handler(p_menu->name)) == NULL) + { + log_error("Undefined menu filter handler [%s]\n", p_menu->name); + return -1; + } + } } for (menu_item_id = 0; menu_item_id < p_menu_set->menu_item_count; menu_item_id++) @@ -739,7 +848,7 @@ int load_menu(MENU_SET *p_menu_set, cons return 0; } -static int display_menu_cursor(MENU_SET *p_menu_set, int show) +int display_menu_cursor(MENU_SET *p_menu_set, int show) { MENU_ID menu_id; MENU_ITEM_ID menu_item_id; @@ -770,17 +879,17 @@ static int display_menu_cursor(MENU_SET return 0; } -int display_menu(MENU_SET *p_menu_set) +static int display_menu_current_page(MENU_SET *p_menu_set) { int16_t row = 0; int16_t col = 0; - int menu_selectable = 0; MENU_ID menu_id; MENU_ITEM_ID menu_item_id; MENU *p_menu; MENU_ITEM *p_menu_item; - MENU_SCREEN *p_menu_screen; int16_t menu_item_pos; + int16_t page_id = 0; + MENU_SCREEN *p_menu_screen; menu_id = p_menu_set->menu_id_path[p_menu_set->choose_step]; p_menu = get_menu_by_id(p_menu_set, menu_id); @@ -790,27 +899,13 @@ int display_menu(MENU_SET *p_menu_set) return -1; } - menu_item_pos = p_menu_set->menu_item_pos[p_menu_set->choose_step]; - menu_item_id = p_menu->items[menu_item_pos]; - p_menu_item = get_menu_item_by_id(p_menu_set, menu_item_id); - if (p_menu_item == NULL) - { - log_error("get_menu_item_by_id(%d) return NULL pointer\n", menu_item_id); - return -1; - } - - if (menu_item_pos > 0 && - checkpriv(&BBS_priv, 0, p_menu_item->priv) != 0 && - checklevel2(&BBS_priv, p_menu_item->level)) - { - menu_selectable = 1; - } + clrline(p_menu->page_row, p_menu->page_row + p_menu->page_item_limit - 1); if (p_menu->title.show) { if (p_menu->title.row == 0 && p_menu->title.col == 0) { - show_top(p_menu->title.text); + show_top(p_menu->title.text, BBS_name, ""); } else { @@ -835,6 +930,102 @@ int display_menu(MENU_SET *p_menu_set) prints("%s", p_menu_set->p_menu_screen_buf + p_menu_screen->buf_offset); } + menu_item_pos = p_menu_set->menu_item_pos[p_menu_set->choose_step]; + page_id = p_menu_set->menu_item_page_id[menu_item_pos]; + + while (menu_item_pos >= 0) + { + if (p_menu_set->menu_item_page_id[menu_item_pos] != page_id) + { + menu_item_pos++; + break; + } + + if (menu_item_pos == 0) + { + break; + } + + menu_item_pos--; + } + + for (; menu_item_pos < p_menu->item_count; menu_item_pos++) + { + if (p_menu_set->menu_item_page_id[menu_item_pos] != page_id) + { + break; + } + + menu_item_id = p_menu->items[menu_item_pos]; + p_menu_item = get_menu_item_by_id(p_menu_set, menu_item_id); + + if (p_menu_set->menu_item_display[menu_item_pos] == 0) + { + continue; + } + + row = p_menu_set->menu_item_r_row[menu_item_pos]; + col = p_menu_set->menu_item_r_col[menu_item_pos]; + + moveto(row, col); + prints("%s", p_menu_item->text); + } + + return 0; +} + +int display_menu(MENU_SET *p_menu_set) +{ + int16_t row = 0; + int16_t col = 0; + int menu_selectable = 0; + MENU_ID menu_id; + MENU_ITEM_ID menu_item_id; + MENU *p_menu; + MENU_ITEM *p_menu_item; + int16_t menu_item_pos; + int16_t page_id = 0; + int page_item_count = 0; + + menu_id = p_menu_set->menu_id_path[p_menu_set->choose_step]; + p_menu = get_menu_by_id(p_menu_set, menu_id); + if (p_menu == NULL) + { + log_error("get_menu_by_id(%d) return NULL pointer\n", menu_id); + if (p_menu_set->choose_step > 0) + { + p_menu_set->choose_step--; + return REDRAW; + } + return EXITMENU; + } + + if (p_menu->item_count <= 0) // empty menu + { + moveto(p_menu->screen_row, p_menu->screen_col); + clrtoeol(); + prints("没有可选项"); + press_any_key(); + return -1; + } + + menu_item_pos = p_menu_set->menu_item_pos[p_menu_set->choose_step]; + menu_item_id = p_menu->items[menu_item_pos]; + p_menu_item = get_menu_item_by_id(p_menu_set, menu_item_id); + if (p_menu_item == NULL) + { + log_error("get_menu_item_by_id(%d) return NULL pointer\n", menu_item_id); + return EXITMENU; + } + + if (menu_item_pos > 0 && + !(p_menu->use_filter ? (p_menu->filter_handler((void *)p_menu_item) == 0) + : (checkpriv(&BBS_priv, 0, p_menu_item->priv) == 0 || + checklevel2(&BBS_priv, p_menu_item->level) == 0))) + { + menu_selectable = 1; + } + for (menu_item_pos = 0; menu_item_pos < p_menu->item_count; menu_item_pos++) { menu_item_id = p_menu->items[menu_item_pos]; @@ -849,7 +1040,11 @@ int display_menu(MENU_SET *p_menu_set) col = p_menu_item->col; } - if (checkpriv(&BBS_priv, 0, p_menu_item->priv) == 0 || checklevel2(&BBS_priv, p_menu_item->level) == 0) + p_menu_set->menu_item_page_id[menu_item_pos] = page_id; + + if (p_menu->use_filter ? (p_menu->filter_handler((void *)p_menu_item) == 0) + : (checkpriv(&BBS_priv, 0, p_menu_item->priv) == 0 || + checklevel2(&BBS_priv, p_menu_item->level) == 0)) { p_menu_set->menu_item_display[menu_item_pos] = 0; p_menu_set->menu_item_r_row[menu_item_pos] = 0; @@ -868,15 +1063,30 @@ int display_menu(MENU_SET *p_menu_set) p_menu_set->menu_item_r_row[menu_item_pos] = row; p_menu_set->menu_item_r_col[menu_item_pos] = col; - moveto(row, col); - prints("%s", p_menu_item->text); - row++; + + page_item_count++; + if (p_menu->page_item_limit > 0 && page_item_count >= p_menu->page_item_limit) + { + page_id++; + page_item_count = 0; + row = p_menu->page_row; + col = p_menu->page_col; + } } } if (!menu_selectable) { + moveto(p_menu->screen_row, p_menu->screen_col); + clrtoeol(); + prints("没有可选项"); + press_any_key(); + return -1; + } + + if (display_menu_current_page(p_menu_set) != 0) + { return -1; } @@ -892,10 +1102,13 @@ int menu_control(MENU_SET *p_menu_set, i MENU *p_menu; MENU_ITEM *p_menu_item; int16_t menu_item_pos; + int16_t page_id; + int require_page_change = 0; if (p_menu_set->menu_count == 0) { - return 0; + log_error("Empty menu set\n"); + return EXITBBS; } menu_id = p_menu_set->menu_id_path[p_menu_set->choose_step]; @@ -903,27 +1116,42 @@ int menu_control(MENU_SET *p_menu_set, i if (p_menu == NULL) { log_error("get_menu_by_id(%d) return NULL pointer\n", menu_id); - return -1; + if (p_menu_set->choose_step > 0) + { + p_menu_set->choose_step--; + return REDRAW; + } + return EXITBBS; } if (p_menu->item_count == 0) { - return 0; +#ifdef _DEBUG + log_error("Empty menu (%s)\n", p_menu->name); +#endif + if (p_menu_set->choose_step > 0) + { + p_menu_set->choose_step--; + return REDRAW; + } + return EXITBBS; } menu_item_pos = p_menu_set->menu_item_pos[p_menu_set->choose_step]; + page_id = p_menu_set->menu_item_page_id[menu_item_pos]; + menu_item_id = p_menu->items[menu_item_pos]; p_menu_item = get_menu_item_by_id(p_menu_set, menu_item_id); if (p_menu_item == NULL) { log_error("get_menu_item_by_id(%d) return NULL pointer\n", menu_item_id); - return -1; + p_menu_set->menu_item_pos[p_menu_set->choose_step] = 0; + return REDRAW; } switch (key) { case CR: - igetch_reset(); case KEY_RIGHT: if (p_menu_item->submenu) { @@ -945,21 +1173,20 @@ int menu_control(MENU_SET *p_menu_set, i return ((*(p_menu_item->action_cmd_handler))((void *)(p_menu_item->name))); } break; + case KEY_ESC: case KEY_LEFT: if (p_menu_set->choose_step > 0) { p_menu_set->choose_step--; - if (display_menu(p_menu_set) != 0) - { - return menu_control(p_menu_set, KEY_LEFT); - } - if (p_menu_set->choose_step == 0) - { - return REDRAW; - } + return REDRAW; } else { + if (p_menu_set->allow_exit) + { + return EXITMENU; + } + display_menu_cursor(p_menu_set, 0); menu_item_pos = p_menu->item_count - 1; while (menu_item_pos >= 0) @@ -985,6 +1212,8 @@ int menu_control(MENU_SET *p_menu_set, i display_menu_cursor(p_menu_set, 1); } break; + case KEY_PGUP: + require_page_change = 1; case KEY_UP: display_menu_cursor(p_menu_set, 0); do @@ -993,6 +1222,7 @@ int menu_control(MENU_SET *p_menu_set, i if (menu_item_pos < 0) { menu_item_pos = p_menu->item_count - 1; + require_page_change = 0; } menu_item_id = p_menu->items[menu_item_pos]; p_menu_item = get_menu_item_by_id(p_menu_set, menu_item_id); @@ -1001,10 +1231,20 @@ int menu_control(MENU_SET *p_menu_set, i log_error("get_menu_item_by_id(%d) return NULL pointer\n", menu_item_id); return -1; } - } while (!p_menu_set->menu_item_display[menu_item_pos]); + if (require_page_change && p_menu_set->menu_item_page_id[menu_item_pos] != page_id) + { + require_page_change = 0; + } + } while (require_page_change || !p_menu_set->menu_item_display[menu_item_pos]); p_menu_set->menu_item_pos[p_menu_set->choose_step] = menu_item_pos; + if (p_menu_set->menu_item_page_id[menu_item_pos] != page_id) + { + display_menu_current_page(p_menu_set); + } display_menu_cursor(p_menu_set, 1); break; + case KEY_PGDN: + require_page_change = 1; case KEY_DOWN: display_menu_cursor(p_menu_set, 0); do @@ -1013,6 +1253,7 @@ int menu_control(MENU_SET *p_menu_set, i if (menu_item_pos >= p_menu->item_count) { menu_item_pos = 0; + require_page_change = 0; } menu_item_id = p_menu->items[menu_item_pos]; p_menu_item = get_menu_item_by_id(p_menu_set, menu_item_id); @@ -1021,12 +1262,19 @@ int menu_control(MENU_SET *p_menu_set, i log_error("get_menu_item_by_id(%d) return NULL pointer\n", menu_item_id); return -1; } - } while (!p_menu_set->menu_item_display[menu_item_pos]); + if (require_page_change && p_menu_set->menu_item_page_id[menu_item_pos] != page_id) + { + require_page_change = 0; + } + } while (require_page_change || !p_menu_set->menu_item_display[menu_item_pos]); p_menu_set->menu_item_pos[p_menu_set->choose_step] = menu_item_pos; + if (p_menu_set->menu_item_page_id[menu_item_pos] != page_id) + { + display_menu_current_page(p_menu_set); + } display_menu_cursor(p_menu_set, 1); break; case KEY_HOME: - case KEY_PGUP: display_menu_cursor(p_menu_set, 0); menu_item_pos = 0; while (menu_item_pos < p_menu->item_count - 1) @@ -1047,10 +1295,13 @@ int menu_control(MENU_SET *p_menu_set, i menu_item_pos++; } p_menu_set->menu_item_pos[p_menu_set->choose_step] = menu_item_pos; + if (p_menu_set->menu_item_page_id[menu_item_pos] != page_id) + { + display_menu_current_page(p_menu_set); + } display_menu_cursor(p_menu_set, 1); break; case KEY_END: - case KEY_PGDN: display_menu_cursor(p_menu_set, 0); menu_item_pos = p_menu->item_count - 1; while (menu_item_pos > 0) @@ -1071,6 +1322,10 @@ int menu_control(MENU_SET *p_menu_set, i menu_item_pos--; } p_menu_set->menu_item_pos[p_menu_set->choose_step] = menu_item_pos; + if (p_menu_set->menu_item_page_id[menu_item_pos] != page_id) + { + display_menu_current_page(p_menu_set); + } display_menu_cursor(p_menu_set, 1); break; default: @@ -1090,8 +1345,12 @@ int menu_control(MENU_SET *p_menu_set, i { display_menu_cursor(p_menu_set, 0); p_menu_set->menu_item_pos[p_menu_set->choose_step] = menu_item_pos; + if (p_menu_set->menu_item_page_id[menu_item_pos] != page_id) + { + display_menu_current_page(p_menu_set); + } display_menu_cursor(p_menu_set, 1); - return 0; + break; } } } @@ -1103,6 +1362,13 @@ int menu_control(MENU_SET *p_menu_set, i int unload_menu(MENU_SET *p_menu_set) { + int shmid; + + if (p_menu_set == NULL) + { + return -1; + } + if (p_menu_set->p_menu_name_dict != NULL) { trie_dict_destroy(p_menu_set->p_menu_name_dict); @@ -1115,51 +1381,62 @@ int unload_menu(MENU_SET *p_menu_set) p_menu_set->p_menu_screen_dict = NULL; } - unload_menu_shm(p_menu_set); + shmid = p_menu_set->shmid; - if (shmctl(p_menu_set->shmid, IPC_RMID, NULL) == -1) + detach_menu_shm(p_menu_set); + + if (shmid != 0 && shmctl(shmid, IPC_RMID, NULL) == -1) { - log_error("shmctl(shmid=%d, IPC_RMID) error (%d)\n", p_menu_set->shmid, errno); + log_error("shmctl(shmid=%d, IPC_RMID) error (%d)\n", shmid, errno); return -1; } return 0; } -int load_menu_shm(MENU_SET *p_menu_set) +int get_menu_shm_readonly(MENU_SET *p_menu_set) { - // Mount shared memory - if (p_menu_set->p_reserved == NULL) + void *p_shm; + + p_shm = shmat(p_menu_set->shmid, NULL, SHM_RDONLY); + if (p_shm == (void *)-1) { - p_menu_set->p_reserved = shmat(p_menu_set->shmid, NULL, SHM_RDONLY); - if (p_menu_set->p_reserved == (void *)-1) - { - log_error("shmat() error (%d)\n", errno); - return -1; - } + log_error("shmat(menu_shm shmid = %d) error (%d)\n", p_menu_set->shmid, errno); + return -1; } - p_menu_set->p_menu_pool = p_menu_set->p_reserved + MENU_SET_RESERVED_LENGTH; - p_menu_set->p_menu_item_pool = p_menu_set->p_menu_pool + sizeof(MENU) * MAX_MENUS; - p_menu_set->p_menu_screen_pool = p_menu_set->p_menu_item_pool + sizeof(MENU_ITEM) * MAX_MENUITEMS; - p_menu_set->p_menu_screen_buf = p_menu_set->p_menu_screen_pool + sizeof(MENU_SCREEN) * MAX_MENUS; + p_menu_set->p_reserved = p_shm; + p_menu_set->p_menu_pool = (char *)(p_menu_set->p_reserved) + MENU_SET_RESERVED_LENGTH; + p_menu_set->p_menu_item_pool = (char *)(p_menu_set->p_menu_pool) + sizeof(MENU) * MAX_MENUS; + p_menu_set->p_menu_screen_pool = (char *)(p_menu_set->p_menu_item_pool) + sizeof(MENU_ITEM) * MAX_MENUITEMS; + p_menu_set->p_menu_screen_buf = (char *)(p_menu_set->p_menu_screen_pool) + sizeof(MENU_SCREEN) * MAX_MENUS; p_menu_set->p_menu_screen_buf_free = p_menu_set->p_menu_screen_buf; - // Restore status varaibles into reserved memory area - p_menu_set->menu_count = *((int16_t *)p_menu_set->p_reserved); - p_menu_set->menu_item_count = *(((int16_t *)p_menu_set->p_reserved) + 1); - p_menu_set->menu_screen_count = *(((int16_t *)p_menu_set->p_reserved) + 2); - p_menu_set->choose_step = 0; p_menu_set->menu_id_path[0] = 0; + p_menu_set->menu_item_pos[0] = 0; - p_menu_set->p_menu_name_dict = NULL; - p_menu_set->p_menu_screen_dict = NULL; + return 0; +} + +int set_menu_shm_readonly(MENU_SET *p_menu_set) +{ + void *p_shm; + + // Remap shared memory in read-only mode + p_shm = shmat(p_menu_set->shmid, p_menu_set->p_reserved, SHM_RDONLY | SHM_REMAP); + if (p_shm == (void *)-1) + { + log_error("shmat(menu_shm shmid = %d) error (%d)\n", p_menu_set->shmid, errno); + return -1; + } + + p_menu_set->p_reserved = p_shm; return 0; } -int unload_menu_shm(MENU_SET *p_menu_set) +int detach_menu_shm(MENU_SET *p_menu_set) { p_menu_set->menu_count = 0; p_menu_set->menu_item_count = 0; @@ -1172,11 +1449,15 @@ int unload_menu_shm(MENU_SET *p_menu_set p_menu_set->p_menu_screen_buf = NULL; p_menu_set->p_menu_screen_buf_free = NULL; + p_menu_set->p_menu_name_dict = NULL; + p_menu_set->p_menu_screen_dict = NULL; + if (p_menu_set->p_reserved != NULL && shmdt(p_menu_set->p_reserved) == -1) { log_error("shmdt() error (%d)\n", errno); return -1; } + p_menu_set->p_reserved = NULL; return 0;