diff options
Diffstat (limited to '')
| -rw-r--r-- | wavemon.c | 231 |
1 files changed, 179 insertions, 52 deletions
@@ -19,29 +19,96 @@ */ #include "wavemon.h" #include <locale.h> +#include <setjmp.h> /* GLOBALS */ + +/** + * screen switching table + * @key_name: name under which the screen appears in the menu bar + * @init: screen initialisation function pointer + * @loop: screen update function pointer (connected to menu) + * @fini: screen cleanup function pointer + */ static const struct { - char key_name[6]; - enum wavemon_screen (*screen_func)(WINDOW *); + const char *const key_name; + void (*init)(void); + int (*loop)(WINDOW *); + void (*fini)(void); } screens[] = { - [SCR_INFO] = { "info", scr_info }, - [SCR_LHIST] = { "lhist", scr_lhist }, - [SCR_APLIST] = { "aplst", scr_aplst }, - [SCR_EMPTY_F4] = { "", NULL }, - [SCR_EMPTY_F5] = { "", NULL }, - [SCR_EMPTY_F6] = { "", NULL }, - [SCR_CONF] = { "prefs", scr_conf }, - [SCR_HELP] = { "help", scr_help }, - [SCR_ABOUT] = { "about", scr_about }, - [SCR_QUIT] = { "quit", NULL } + [SCR_INFO] = { + .key_name = "info", + .init = scr_info_init, + .loop = scr_info_loop, + .fini = scr_info_fini + }, + [SCR_LHIST] = { + .key_name = "lhist", + .init = scr_lhist_init, + .loop = scr_lhist_loop, + .fini = scr_lhist_fini + }, + [SCR_APLIST] = { + .key_name = "scan", + .init = scr_aplst_init, + .loop = scr_aplst_loop, + .fini = scr_aplst_fini + }, + [SCR_EMPTY_F4] = { + .key_name = "", + }, + [SCR_EMPTY_F5] = { + .key_name = "", + }, + [SCR_EMPTY_F6] = { + .key_name = "", + }, + [SCR_CONF] = { + .key_name = "prefs", + .init = scr_conf_init, + .loop = scr_conf_loop, + .fini = scr_conf_fini + }, + [SCR_HELP] = { + .key_name = "help", + .init = scr_help_init, + .loop = scr_help_loop, + .fini = scr_help_fini + }, + [SCR_ABOUT] = { + .key_name = "about", + .init = scr_about_init, + .loop = scr_about_loop, + .fini = scr_about_fini + }, + [SCR_QUIT] = { + .key_name = "quit", + } }; -static void update_menubar(WINDOW *menu, const enum wavemon_screen active) +/* + * SIGWINCH handling with buffer synchronisation variable + */ +static sigjmp_buf env_winch; +static volatile sig_atomic_t env_winch_ready; + +static void sig_winch(int signo) { + if (env_winch_ready) { + env_winch_ready = false; + siglongjmp(env_winch, 1); + } +} + +static WINDOW *init_menubar(const enum wavemon_screen active) +{ + WINDOW *menu = newwin(1, WAV_WIDTH, WAV_HEIGHT, 0); enum wavemon_screen cur; - for (cur = SCR_INFO, wmove(menu, 0, 0); cur <= SCR_QUIT; cur++) { + nodelay(menu, TRUE); + keypad(menu, TRUE); + wmove(menu, 0, 0); + for (cur = SCR_INFO; cur <= SCR_QUIT; cur++) { wattrset(menu, A_REVERSE | A_BOLD); wprintw(menu, "F%d", cur + 1); @@ -50,32 +117,35 @@ static void update_menubar(WINDOW *menu, const enum wavemon_screen active) wprintw(menu, "%-6s", screens[cur].key_name); } wrefresh(menu); + + return menu; } -static void sig_winch(int signo) +static void check_geometry(void) { - endwin(); - errx(1, "under the pain of death, thou shaltst not resize thyne window"); + if (conf.check_geometry && + (LINES < MIN_SCREEN_LINES || COLS < MIN_SCREEN_COLS)) + err_quit("need at least a screen of %ux%u, have only %ux%u", + MIN_SCREEN_LINES, MIN_SCREEN_COLS, LINES, COLS); } int main(int argc, char *argv[]) { WINDOW *w_menu; enum wavemon_screen cur, next; + sigset_t blockmask, oldmask; getconf(argc, argv); - if (signal(SIGWINCH, sig_winch) == SIG_ERR) - err(1, "cannot install handler for window changes"); + if (!isatty(STDIN_FILENO)) + errx(1, "input is not from a terminal"); /* honour numeric separators if the environment defines them */ setlocale(LC_NUMERIC, ""); /* initialize the ncurses interface */ initscr(); - if (LINES < MIN_SCREEN_LINES || COLS < MIN_SCREEN_COLS) - err_quit("need at least a screen of %ux%u, have only %ux%u", - MIN_SCREEN_LINES, MIN_SCREEN_COLS, LINES, COLS); + check_geometry(); cbreak(); noecho(); nonl(); @@ -83,36 +153,93 @@ int main(int argc, char *argv[]) curs_set(0); start_color(); - init_pair(CP_STANDARD, COLOR_WHITE, COLOR_BLACK); - init_pair(CP_SCALEHI, COLOR_RED, COLOR_BLACK); - init_pair(CP_SCALEMID, COLOR_YELLOW, COLOR_BLACK); - init_pair(CP_SCALELOW, COLOR_GREEN, COLOR_BLACK); - init_pair(CP_WTITLE, COLOR_CYAN, COLOR_BLACK); - init_pair(CP_INACTIVE, COLOR_CYAN, COLOR_BLACK); - init_pair(CP_ACTIVE, COLOR_CYAN, COLOR_BLUE); - init_pair(CP_STATSIG, COLOR_GREEN, COLOR_BLACK); - init_pair(CP_STATNOISE, COLOR_RED, COLOR_BLACK); - init_pair(CP_STATSNR, COLOR_BLUE, COLOR_BLUE); - init_pair(CP_STATBKG, COLOR_BLUE, COLOR_BLACK); - init_pair(CP_STATSIG_S, COLOR_GREEN, COLOR_BLUE); - init_pair(CP_STATNOISE_S, COLOR_RED, COLOR_BLUE); - init_pair(CP_PREF_NORMAL, COLOR_WHITE, COLOR_BLACK); - init_pair(CP_PREF_SELECT, COLOR_WHITE, COLOR_BLUE); - init_pair(CP_PREF_ARROW, COLOR_RED, COLOR_BLACK); - - w_menu = newwin(1, WAV_WIDTH, WAV_HEIGHT, 0); - nodelay(w_menu, TRUE); - keypad(w_menu, TRUE); - - for (cur = SCR_HELP, next = conf.startup_scr; next != SCR_QUIT; ) { - - if (screens[next].screen_func != NULL) - cur = next; - - reinit_on_changes(); - update_menubar(w_menu, cur); - next = (*screens[cur].screen_func)(w_menu); - + init_pair(CP_STANDARD, COLOR_WHITE, COLOR_BLACK); + init_pair(CP_SCALEHI, COLOR_RED, COLOR_BLACK); + init_pair(CP_SCALEMID, COLOR_YELLOW, COLOR_BLACK); + init_pair(CP_SCALELOW, COLOR_GREEN, COLOR_BLACK); + init_pair(CP_WTITLE, COLOR_CYAN, COLOR_BLACK); + init_pair(CP_INACTIVE, COLOR_CYAN, COLOR_BLACK); + init_pair(CP_ACTIVE, COLOR_CYAN, COLOR_BLUE); + + init_pair(CP_STATSIG, COLOR_GREEN, COLOR_BLACK); + init_pair(CP_STATNOISE, COLOR_RED, COLOR_BLACK); + init_pair(CP_STATSNR, COLOR_BLUE, COLOR_BLUE); + init_pair(CP_STATBKG, COLOR_BLUE, COLOR_BLACK); + init_pair(CP_STATSIG_S, COLOR_GREEN, COLOR_BLUE); + init_pair(CP_STATNOISE_S, COLOR_RED, COLOR_BLUE); + + init_pair(CP_PREF_NORMAL, COLOR_WHITE, COLOR_BLACK); + init_pair(CP_PREF_SELECT, COLOR_WHITE, COLOR_BLUE); + init_pair(CP_PREF_ARROW, COLOR_RED, COLOR_BLACK); + + init_pair(CP_SCAN_CRYPT, COLOR_RED, COLOR_BLACK); + init_pair(CP_SCAN_UNENC, COLOR_GREEN, COLOR_BLACK); + init_pair(CP_SCAN_NON_AP, COLOR_YELLOW, COLOR_BLACK); + + /* Override signal handlers installed during ncurses initialisation. */ + xsignal(SIGCHLD, SIG_IGN); + xsignal(SIGWINCH, sig_winch); /* triggers only when env_winch_ready */ + sigemptyset(&blockmask); + sigaddset(&blockmask, SIGWINCH); + + for (cur = conf.startup_scr; cur != SCR_QUIT; cur = next) { + + if (sigprocmask(SIG_BLOCK, &blockmask, &oldmask) < 0) + err_sys("cannot block SIGWINCH"); + + next = cur; + w_menu = init_menubar(cur); + (*screens[cur].init)(); + + if (sigprocmask(SIG_SETMASK, &oldmask, NULL) < 0) + err_sys("cannot unblock SIGWINCH"); + + if (sigsetjmp(env_winch, true) == 0) { + env_winch_ready = true; + + do { + int key = (*screens[cur].loop)(w_menu); + + if (key <= 0) + usleep(5000); + switch (key) { + case KEY_F(1): + case KEY_F(2): + case KEY_F(3): + case KEY_F(7): + case KEY_F(8): + case KEY_F(9): + case KEY_F(10): + next = key - KEY_F(1); + break; + case 'i': + next = SCR_INFO; + break; + case 'q': + next = SCR_QUIT; + break; + default: + continue; + } + } while (next == cur); + } + + delwin(w_menu); + (*screens[cur].fini)(); + + /* + * next = cur is set in the protected critical section before + * sigsetjmp. Due to the loop condition, it can not occur when + * no SIGWINCH occurred, hence it indicates a resizing event. + */ + if (next == cur) { + struct winsize size; + + if (ioctl(STDIN_FILENO, TIOCGWINSZ, &size) < 0) + err_sys("can not determine terminal size"); + resizeterm(size.ws_row, size.ws_col); + check_geometry(); + } clear(); refresh(); } |