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/*
* wavemon - a wireless network monitoring aplication
*
* Copyright (c) 2001-2002 Jan Morgenstern <jan@jm-music.de>
*
* wavemon 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 2, or (at your option) any later
* version.
*
* wavemon is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with wavemon; see the file COPYING. If not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#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 {
const char *const key_name;
void (*init)(void);
int (*loop)(WINDOW *);
void (*fini)(void);
} screens[] = {
[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",
}
};
/*
* 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;
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);
wattrset(menu, cur != active ? COLOR_PAIR(CP_INACTIVE)
: COLOR_PAIR(CP_ACTIVE) | A_BOLD);
wprintw(menu, "%-6s", screens[cur].key_name);
}
wrefresh(menu);
return menu;
}
static void check_geometry(void)
{
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 (!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();
check_geometry();
cbreak();
noecho();
nonl();
clear();
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);
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();
}
endwin();
return EXIT_SUCCESS;
}
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