static struct gui_window {
WINDOW *win;
- size_t begx;
- size_t begy;
- size_t cols;
- size_t lines;
} top, bot, sb, in, sep;
#define RINGBUFFER_SIZE 512
int color;
};
static struct ringbuffer *bot_win_rb;
-#define NUM_LINES(len) (1 + (len) / bot.cols)
static unsigned scroll_position;
-static bool curses_active;
static pid_t cmd_pid;
static int command_fds[2] = {-1, -1};
static int stat_pipe = -1;
static struct gui_args_info conf;
+static int loglevel;
-enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
-
+enum cmd_status {
+ CMDS_IDLE, /* no command running */
+ CMDS_DCMD, /* para or display command running */
+ CMDS_XCMD, /* external command running */
+};
/**
* Codes for various colors.
static struct gui_theme theme;
-static int _argc;
-static char **_argv;
-
static void com_help(void);
static void com_reread_conf(void);
static void com_enlarge_top_win(void);
return -1;
}
+/*
+ * Even though ncurses provides getmaxx and getmaxy, these functions/macros are
+ * not described in the XSI Curses standard.
+ */
+static int get_num_lines(struct gui_window *w)
+{
+ int lines;
+ __a_unused int cols; /* avoid "set but not used" warnings */
+
+ getmaxyx(w->win, lines, cols);
+ return lines;
+}
+
+static int get_num_cols(struct gui_window *w)
+{
+ __a_unused int lines; /* avoid "set but not used" warnings */
+ int cols;
+
+ getmaxyx(w->win, lines, cols);
+ return cols;
+}
+
+/** Number of lines of the window are occupied by an output line. */
+#define NUM_LINES(len) (1 + (len) / get_num_cols(&bot))
+
+/* isendwin() returns false before initscr() was called */
+static bool curses_active(void)
+{
+ return top.win && !isendwin();
+}
+
/* taken from mutt */
static char *km_keyname(int c)
{
return buf;
}
-static char *configfile_exists(void)
-{
- static char *config_file;
- char *tmp;
-
- if (!conf.config_file_given) {
- if (!config_file) {
- char *home = para_homedir();
- config_file = make_message("%s/.paraslash/gui.conf",
- home);
- free(home);
- }
- tmp = config_file;
- } else
- tmp = conf.config_file_arg;
- return file_exists(tmp)? tmp: NULL;
-}
-
/* Print given number of spaces to curses window. */
static void add_spaces(WINDOW* win, unsigned int num)
{
char *msg;
va_list ap;
- if (!curses_active)
+ if (!curses_active())
return;
wattron(in.win, COLOR_PAIR(color));
va_start(ap, fmt);
xvasprintf(&msg, fmt, ap);
va_end(ap);
wmove(in.win, 0, 0);
- align_str(in.win, msg, in.cols, LEFT);
+ align_str(in.win, msg, get_num_cols(&in), LEFT);
free(msg);
wrefresh(in.win);
}
tmp = para_strdup("para_gui " PACKAGE_VERSION " (hit ? for help)");
wmove(sb.win, 0, 0);
- align_str(sb.win, tmp, sb.cols, CENTER);
+ align_str(sb.win, tmp, get_num_cols(&sb), CENTER);
free(tmp);
}
*/
static int first_visible_rbe(unsigned *lines)
{
- int i;
+ int i, bot_lines = get_num_lines(&bot);
+
*lines = 0;
for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
int rbe_lines;
if (!rbe)
return i - 1;
-// fprintf(stderr, "found: %s\n", rbe->msg);
rbe_lines = NUM_LINES(rbe->len);
- if (rbe_lines > bot.lines)
+ if (rbe_lines > bot_lines)
return -1;
*lines += rbe_lines;
- if (*lines >= bot.lines)
+ if (*lines >= bot_lines)
return i;
}
return RINGBUFFER_SIZE - 1;
*/
static int draw_top_rbe(unsigned *lines)
{
- int ret, fvr = first_visible_rbe(lines);
+ int bot_cols, bot_lines, ret, fvr = first_visible_rbe(lines);
struct rb_entry *rbe;
size_t bytes_to_skip, cells_to_skip, width;
rbe = ringbuffer_get(bot_win_rb, fvr);
if (!rbe)
return -1;
- if (*lines > bot.lines) {
+ getmaxyx(bot.win, bot_lines, bot_cols);
+ if (*lines > bot_lines) {
/* rbe is partially visible multi-line */
- cells_to_skip = (*lines - bot.lines) * bot.cols;
+ cells_to_skip = (*lines - bot_lines) * bot_cols;
ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
if (ret < 0)
return ret;
static void redraw_bot_win(void)
{
unsigned lines;
- int i;
+ int i, bot_lines = get_num_lines(&bot);
wmove(bot.win, 0, 0);
wclear(bot.win);
i = draw_top_rbe(&lines);
if (i <= 0)
goto out;
- while (i > 0 && lines < bot.lines) {
+ while (i > 0 && lines < bot_lines) {
struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
if (!rbe) {
lines++;
new->len = len;
new->msg = msg;
old = ringbuffer_add(bot_win_rb, new);
-// fprintf(stderr, "added: %s\n", new->msg);
if (old) {
free(old->msg);
free(old);
char *msg;
va_list ap;
- if (!curses_active)
+ if (!curses_active())
return;
va_start(ap, fmt);
xvasprintf(&msg, fmt, ap);
{
int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
- if (!curses_active)
+ if (!curses_active())
return 1;
rb_add_entry(color, para_strdup(line));
return 1;
}
-static int loglevel;
-
static __printf_2_3 void curses_log(int ll, const char *fmt,...)
{
- int color;
- char *msg;
va_list ap;
- unsigned bytes;
- if (ll < loglevel || !curses_active)
+ if (ll < loglevel)
return;
- switch (ll) {
- case LL_DEBUG:
- case LL_INFO:
- case LL_NOTICE:
- color = COLOR_MSG;
- break;
- default:
- color = COLOR_ERRMSG;
- }
va_start(ap, fmt);
- bytes = xvasprintf(&msg, fmt, ap);
+ if (curses_active()) {
+ int color = ll <= LL_NOTICE? COLOR_MSG : COLOR_ERRMSG;
+ char *msg;
+ unsigned bytes = xvasprintf(&msg, fmt, ap);
+ if (bytes > 0 && msg[bytes - 1] == '\n')
+ msg[bytes - 1] = '\0'; /* cut trailing newline */
+ rb_add_entry(color, msg);
+ wrefresh(bot.win);
+ } else if (cmd_pid <= 0) /* no external command running */
+ vfprintf(stderr, fmt, ap);
va_end(ap);
- if (bytes > 0 && msg[bytes - 1] == '\n')
- msg[bytes - 1] = '\0'; /* cut trailing newline */
- rb_add_entry(color, msg);
- wrefresh(bot.win);
}
__printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
para_install_sighandler(SIGUSR1);
}
-/* kill every process in the process group and exit */
-__noreturn static void kill_pg_and_die(int ret)
-{
- para_sigaction(SIGTERM, SIG_IGN);
- kill(0, SIGTERM);
- exit(ret);
-}
-
static void shutdown_curses(void)
{
- if (!curses_active)
- return;
def_prog_mode();
- curses_active = false;
endwin();
}
-__noreturn static void finish(int ret)
-{
- shutdown_curses();
- kill_pg_and_die(ret);
-}
-
-/*
- * exit curses and print given message to stdout/stderr
- */
-__noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
+/* disable curses, print a message, kill running processes and exit */
+__noreturn __printf_2_3 static void die(int exit_code, const char* fmt, ...)
{
va_list argp;
- FILE *outfd = ret? stderr: stdout;
shutdown_curses();
va_start(argp, fmt);
- vfprintf(outfd, fmt, argp);
+ vfprintf(stderr, fmt, argp);
va_end(argp);
- kill_pg_and_die(ret);
-}
-
-/*
- * init all windows
- */
-static void init_wins(int top_lines)
-{
- top.lines = top_lines;
- top.cols = COLS;
- top.begy = 0;
- top.begx = 0;
-
- bot.lines = LINES - top.lines - 3;
- bot.cols = COLS;
- bot.begy = top.lines + 1;
- bot.begx = 0;
-
- sb.lines = 1;
- sb.cols = COLS;
- sb.begy = LINES - 2;
- sb.begx = 0;
-
- in.lines = 1;
- in.cols = COLS;
- in.begy = LINES - 1;
- in.begx = 0;
-
- sep.lines = 1;
- sep.cols = COLS;
- sep.begy = top.lines;
- sep.begx = 0;
-
- assume_default_colors(theme.default_fg, theme.default_bg);
- if (top.win) {
- mvwin(top.win, top.begy, top.begx);
- wresize(top.win, top.lines, top.cols);
-
- mvwin(sb.win, sb.begy, sb.begx);
- wresize(sb.win, sb.lines, sb.cols);
-
- mvwin(sep.win, sep.begy, sep.begx);
- wresize(sep.win, sep.lines, sep.cols);
-
- mvwin(bot.win, bot.begy, bot.begx);
- wresize(bot.win, bot.lines, bot.cols);
-
- mvwin(in.win, in.begy, in.begx);
- wresize(in.win, in.lines, in.cols);
- } else {
- sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
- top.win = newwin(top.lines, top.cols, top.begy, top.begx);
- bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
- sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
- in.win = newwin(in.lines, in.cols, in.begy, in.begx);
- if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
- msg_n_exit(1, "Error: Cannot create curses windows\n");
- wclear(bot.win);
- wclear(sb.win);
- wclear(in.win);
- scrollok(bot.win, 1);
- wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
- wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
- wattron(bot.win, COLOR_PAIR(COLOR_BOT));
- wattron(top.win, COLOR_PAIR(COLOR_TOP));
- nodelay(top.win, 1);
- nodelay(bot.win, 1);
- nodelay(sb.win, 1);
- nodelay(in.win, 0);
-
- keypad(top.win, 1);
- keypad(bot.win, 1);
- keypad(sb.win, 1);
- keypad(in.win, 1);
- }
- wmove(sep.win, 0, 0);
- whline(sep.win, theme.sep_char, COLS);
- wclear(top.win);
- //wclear(bot.win);
- wnoutrefresh(top.win);
- wnoutrefresh(bot.win);
- print_status_bar();
- wnoutrefresh(sb.win);
- wnoutrefresh(in.win);
- wnoutrefresh(sep.win);
- doupdate();
+ /* kill every process in the process group and exit */
+ para_sigaction(SIGTERM, SIG_IGN);
+ kill(0, SIGTERM);
+ exit(exit_code);
}
/*
char *tmp;
struct stat_item_data d = theme.data[i];
char *c = stat_content[i];
+ int top_lines = get_num_lines(&top);
- if (!curses_active || !d.len || !c)
+ if (!curses_active() || !d.len || !c)
return;
tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
- wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
+ wmove(top.win, d.y * top_lines / 100, d.x * COLS / 100);
wrefresh(top.win);
wattron(top.win, COLOR_PAIR(i + 1));
align_str(top.win, tmp, d.len * COLS / 100, d.align);
return 1;
}
-static int read_stat_pipe(fd_set *rfds)
+static void print_all_items(void)
+{
+ int i;
+
+ if (!curses_active())
+ return;
+ FOR_EACH_STATUS_ITEM(i)
+ print_stat_item(i);
+}
+
+static void clear_all_items(void)
+{
+ int i;
+
+ FOR_EACH_STATUS_ITEM(i) {
+ free(stat_content[i]);
+ stat_content[i] = para_strdup("");
+ }
+}
+
+static struct timeval next_exec;
+
+static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
+{
+ struct timeval atm, diff;
+
+ if (stat_pipe >= 0)
+ return para_fd_set(stat_pipe, rfds, max_fileno);
+ gettimeofday(&atm, NULL);
+ if (tv_diff(&next_exec, &atm, &diff) > 0) {
+ *tv = diff;
+ return;
+ }
+ tv->tv_sec = tv->tv_usec = 0; /* min delay */
+}
+
+static void status_post_select(fd_set *rfds)
{
static char *buf;
static int bufsize, loaded;
- int ret, ret2;
size_t sz;
+ pid_t pid;
+ int ret, ret2;
+
+ if (stat_pipe < 0) {
+ struct timeval atm;
+ int fds[3] = {0, 1, 0};
+ /* Avoid busy loop */
+ gettimeofday(&atm, NULL);
+ if (tv_diff(&next_exec, &atm, NULL) > 0)
+ return;
+ next_exec.tv_sec = atm.tv_sec + 2;
+ ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
+ if (ret < 0)
+ return;
+ ret = mark_fd_nonblocking(fds[1]);
+ if (ret < 0) {
+ close(fds[1]);
+ return;
+ }
+ stat_pipe = fds[1];
+ return;
+ }
- if (stat_pipe < 0)
- return 0;
if (loaded >= bufsize) {
if (bufsize > 1000 * 1000) {
loaded = 0;
- return 0;
+ return;
}
bufsize += bufsize + 1000;
buf = para_realloc(buf, bufsize);
ret2 = for_each_stat_item(buf, loaded, update_item);
if (ret < 0 || ret2 < 0) {
loaded = 0;
- return ret2 < 0? ret2 : ret;
+ PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
+ close(stat_pipe);
+ stat_pipe = -1;
+ clear_all_items();
+ free(stat_content[SI_BASENAME]);
+ stat_content[SI_BASENAME] =
+ para_strdup("stat command terminated!?");
+ print_all_items();
+ return;
}
sz = ret2; /* what is left */
if (sz > 0 && sz < loaded)
memmove(buf, buf + loaded - sz, sz);
loaded = sz;
- return 1;
}
-static void print_all_items(void)
+/*
+ * init all windows
+ */
+static void init_wins(int top_lines)
{
- int i;
+ int top_y = 0, bot_y = top_lines + 1, sb_y = LINES - 2,
+ in_y = LINES - 1, sep_y = top_lines;
+ int bot_lines = LINES - top_lines - 3, sb_lines = 1, in_lines = 1,
+ sep_lines = 1;
- if (!curses_active)
- return;
- FOR_EACH_STATUS_ITEM(i)
- print_stat_item(i);
-}
+ assume_default_colors(theme.default_fg, theme.default_bg);
+ if (top.win) {
+ wresize(top.win, top_lines, COLS);
+ mvwin(top.win, top_y, 0);
-static void clear_all_items(void)
-{
- int i;
+ wresize(sb.win, sb_lines, COLS);
+ mvwin(sb.win, sb_y, 0);
- FOR_EACH_STATUS_ITEM(i) {
- free(stat_content[i]);
- stat_content[i] = para_strdup("");
+ wresize(sep.win, sep_lines, COLS);
+ mvwin(sep.win, sep_y, 0);
+
+ wresize(bot.win, bot_lines, COLS);
+ mvwin(bot.win, bot_y, 0);
+
+ wresize(in.win, in_lines, COLS);
+ mvwin(in.win, in_y, 0);
+ } else {
+ sep.win = newwin(sep_lines, COLS, sep_y, 0);
+ top.win = newwin(top_lines, COLS, top_y, 0);
+ bot.win = newwin(bot_lines, COLS, bot_y, 0);
+ sb.win = newwin(sb_lines, COLS, sb_y, 0);
+ in.win = newwin(in_lines, COLS, in_y, 0);
+ if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
+ die(EXIT_FAILURE, "Error: Cannot create curses windows\n");
+ wclear(bot.win);
+ wclear(sb.win);
+ wclear(in.win);
+ scrollok(bot.win, 1);
+ wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
+ wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
+ wattron(bot.win, COLOR_PAIR(COLOR_BOT));
+ wattron(top.win, COLOR_PAIR(COLOR_TOP));
+ nodelay(top.win, 1);
+ nodelay(bot.win, 1);
+ nodelay(sb.win, 1);
+ nodelay(in.win, 0);
+
+ keypad(top.win, 1);
+ keypad(bot.win, 1);
+ keypad(sb.win, 1);
+ keypad(in.win, 1);
}
+ wmove(sep.win, 0, 0);
+ whline(sep.win, theme.sep_char, COLS);
+ wclear(top.win);
+ print_all_items();
+ //wclear(bot.win);
+ wnoutrefresh(top.win);
+ wnoutrefresh(bot.win);
+ print_status_bar();
+ wnoutrefresh(sb.win);
+ wnoutrefresh(in.win);
+ wnoutrefresh(sep.win);
+ doupdate();
}
static void init_pair_or_die(short pair, short f, short b)
{
if (init_pair(pair, f, b) == ERR)
- msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
+ die(EXIT_FAILURE, "fatal: init_pair() failed\n");
}
static void init_colors_or_die(void)
int i;
if (!has_colors())
- msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
+ die(EXIT_FAILURE, "fatal: No color term\n");
if (start_color() == ERR)
- msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
+ die(EXIT_FAILURE, "fatal: failed to start colors\n");
FOR_EACH_STATUS_ITEM(i)
if (theme.data[i].len)
init_pair_or_die(i + 1, theme.data[i].fg,
/* (Re-)initialize the curses library. */
static void init_curses(void)
{
- curses_active = true;
+ if (curses_active())
+ return;
if (top.win && refresh() == ERR) /* refresh is really needed */
- msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
+ die(EXIT_FAILURE, "refresh() failed\n");
if (LINES < theme.lines_min || COLS < theme.cols_min)
- msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
+ die(EXIT_FAILURE, "Terminal (%dx%d) too small"
" (need at least %dx%d)\n", COLS, LINES,
theme.cols_min, theme.lines_min);
curs_set(0); /* make cursor invisible, ignore errors */
nonl(); /* do not NL->CR/NL on output, always returns OK */
/* don't echo input */
if (noecho() == ERR)
- msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
+ die(EXIT_FAILURE, "fatal: noecho() failed\n");
/* take input chars one at a time, no wait for \n */
if (cbreak() == ERR)
- msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
+ die(EXIT_FAILURE, "fatal: cbreak() failed\n");
init_colors_or_die();
clear(); /* ignore non-fatal errors */
init_wins(theme.top_lines_default);
- print_all_items();
// noecho(); /* don't echo input */
}
ret = para_reap_child(&pid);
if (ret <= 0)
return;
- if (pid == cmd_pid)
+ if (pid == cmd_pid) {
cmd_pid = 0;
+ init_curses();
+ print_in_bar(COLOR_MSG, " ");
+ }
goto reap_next_child;
}
return 0;
}
-static int check_key_map_args(void)
+static void check_key_map_args_or_die(void)
{
- char *s;
- int i, ret = -1;
- char *tmp = NULL, *handler, *arg;
+ int i;
+ char *tmp = NULL;
for (i = 0; i < conf.key_map_given; ++i) {
- s = conf.key_map_arg[i];
- if (!(*s))
- goto out;
+ char *handler, *arg;
+
free(tmp);
- tmp = para_strdup(s);
+ tmp = para_strdup(conf.key_map_arg[i]);
if (!split_key_map(tmp, &handler, &arg))
- goto out;
+ break;
if (strlen(handler) != 1)
- goto out;
- if (*handler != 'x'
- && *handler != 'd'
- && *handler != 'i'
- && *handler != 'p')
- goto out;
+ break;
+ if (*handler != 'x' && *handler != 'd' && *handler != 'i'
+ && *handler != 'p')
+ break;
if (*handler != 'i')
continue;
if (find_cmd_byname(arg) < 0)
- goto out;
+ break;
}
- ret = 0;
-out:
+ if (i != conf.key_map_given)
+ die(EXIT_FAILURE, "invalid key map: %s\n", conf.key_map_arg[i]);
free(tmp);
- return ret;
+}
+
+static void parse_config_file_or_die(bool override)
+{
+ bool err;
+ char *config_file;
+ struct gui_cmdline_parser_params params = {
+ .override = override,
+ .initialize = 0,
+ .check_required = !override,
+ .check_ambiguity = 0,
+ .print_errors = 1,
+ };
+
+ if (conf.config_file_given)
+ config_file = para_strdup(conf.config_file_arg);
+ else {
+ char *home = para_homedir();
+ config_file = make_message("%s/.paraslash/gui.conf", home);
+ free(home);
+ }
+ if (!file_exists(config_file)) {
+ if (!conf.config_file_given)
+ err = false;
+ else {
+ PARA_EMERG_LOG("config file %s does not exist\n",
+ config_file);
+ err = true;
+ }
+ goto out;
+ }
+ gui_cmdline_parser_config_file(config_file, &conf, ¶ms);
+ loglevel = get_loglevel_by_name(conf.loglevel_arg);
+ check_key_map_args_or_die();
+ theme_init(conf.theme_arg, &theme);
+ err = false;
+out:
+ free(config_file);
+ if (err)
+ exit(EXIT_FAILURE);
+}
+
+/* reread configuration, terminate on errors */
+static void reread_conf(void)
+{
+ /*
+ * gengetopt might print to stderr and exit on errors. So we have to
+ * shutdown curses first.
+ */
+ shutdown_curses();
+ parse_config_file_or_die(true /* override */);
+ init_curses();
+ print_in_bar(COLOR_MSG, "config file reloaded\n");
}
/*
* React to various signal-related events
*/
-static void handle_signal(int sig)
+static void signal_post_select(fd_set *rfds)
{
- switch (sig) {
+ int ret = para_next_signal(rfds);
+ if (ret <= 0)
+ return;
+ switch (ret) {
case SIGTERM:
- msg_n_exit(EXIT_FAILURE,
- "only the good die young (caught SIGTERM))\n");
+ die(EXIT_FAILURE, "only the good die young (caught SIGTERM)\n");
return;
case SIGWINCH:
- if (curses_active) {
+ if (curses_active()) {
shutdown_curses();
init_curses();
redraw_bot_win();
return;
case SIGUSR1:
PARA_NOTICE_LOG("got SIGUSR1, rereading configuration\n");
- com_reread_conf();
+ reread_conf();
return;
case SIGCHLD:
check_sigchld();
}
}
-static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
+#define COMMAND_BUF_SIZE 32768
+
+static enum cmd_status cmd_status(void)
{
- static struct timeval next_exec, atm, diff;
- int ret, fds[3] = {0, 1, 0};
- pid_t pid;
+ if (command_fds[0] >= 0 || command_fds[1] >= 0)
+ return CMDS_DCMD;
+ if (cmd_pid > 0)
+ return CMDS_XCMD;
+ return CMDS_IDLE;
+}
- if (stat_pipe >= 0)
- goto success;
- /* Avoid busy loop */
- gettimeofday(&atm, NULL);
- if (tv_diff(&next_exec, &atm, &diff) > 0) {
- if (tv_diff(&diff, tv, NULL) < 0)
- *tv = diff;
- return;
- }
- next_exec.tv_sec = atm.tv_sec + 2;
- ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
- if (ret < 0)
- return;
- ret = mark_fd_nonblocking(fds[1]);
- if (ret < 0) {
- close(fds[1]);
+static void command_pre_select(fd_set *rfds, int *max_fileno)
+{
+ enum cmd_status cmds = cmd_status();
+
+ if (cmds != CMDS_DCMD)
return;
- }
- stat_pipe = fds[1];
-success:
- para_fd_set(stat_pipe, rfds, max_fileno);
+ if (command_fds[0] >= 0)
+ para_fd_set(command_fds[0], rfds, max_fileno);
+ if (command_fds[1] >= 0)
+ para_fd_set(command_fds[1], rfds, max_fileno);
}
-#define COMMAND_BUF_SIZE 32768
-
-/*
- * This is the core select loop. Besides the (internal) signal
- * pipe, the following other fds are checked according to the mode:
- *
- * GETCH_MODE: check stdin, return when key is pressed
- *
- * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
- * stdout and stderr or when any key is pressed.
- *
- * EXTERNAL_MODE: Check only signal pipe. Used when an external command
- * is running. During that time curses is disabled. Returns when
- * cmd_pid == 0.
- */
-static int do_select(int mode)
+static void command_post_select(fd_set *rfds)
{
- fd_set rfds;
- int ret, i, max_fileno;
- char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
- int cbo[2] = {0, 0}; /* command buf offsets */
- struct timeval tv;
- unsigned flags[2] = {0, 0}; /* for for_each_line() */
+ int i, ret;
+ static char command_buf[2][COMMAND_BUF_SIZE];
+ static int cbo[2]; /* command buf offsets */
+ static unsigned flags[2]; /* for for_each_line() */
+ enum cmd_status cmds = cmd_status();
-repeat:
- tv.tv_sec = conf.timeout_arg / 1000;
- tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
-// ret = refresh_status();
- FD_ZERO(&rfds);
- max_fileno = 0;
- status_pre_select(&rfds, &max_fileno, &tv);
- /* signal pipe */
- para_fd_set(signal_pipe, &rfds, &max_fileno);
- /* command pipe only for COMMAND_MODE */
- if (mode == COMMAND_MODE) {
- if (command_fds[0] >= 0)
- para_fd_set(command_fds[0], &rfds, &max_fileno);
- if (command_fds[1] >= 0)
- para_fd_set(command_fds[1], &rfds, &max_fileno);
- }
- if (mode == GETCH_MODE || mode == COMMAND_MODE)
- para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
- ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
- if (ret <= 0)
- goto check_return; /* skip fd checks */
- /* signals */
- ret = para_next_signal(&rfds);
- if (ret > 0)
- handle_signal(ret);
- /* read command pipe if ready */
- if (mode == COMMAND_MODE) {
- for (i = 0; i < 2; i++) {
- size_t sz;
- if (command_fds[i] < 0)
- continue;
- ret = read_nonblock(command_fds[i],
- command_buf[i] + cbo[i],
- COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
- cbo[i] += sz;
- sz = cbo[i];
- cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
- add_output_line, &i);
- if (sz != cbo[i]) { /* at least one line found */
- wrefresh(bot.win);
- flags[i] = 0;
- }
- if (ret < 0) {
- PARA_NOTICE_LOG("closing command fd %d: %s\n",
+ if (cmds != CMDS_DCMD)
+ return;
+ for (i = 0; i < 2; i++) {
+ size_t sz;
+ if (command_fds[i] < 0)
+ continue;
+ ret = read_nonblock(command_fds[i],
+ command_buf[i] + cbo[i],
+ COMMAND_BUF_SIZE - 1 - cbo[i], rfds, &sz);
+ cbo[i] += sz;
+ sz = cbo[i];
+ cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
+ add_output_line, &i);
+ if (sz != cbo[i]) { /* at least one line found */
+ wrefresh(bot.win);
+ flags[i] = 0;
+ }
+ if (ret < 0 || cmd_pid == 0) {
+ if (ret < 0)
+ PARA_NOTICE_LOG("closing command fd %d: %s",
i, para_strerror(-ret));
- close(command_fds[i]);
- command_fds[i] = -1;
- flags[i] = 0;
- cbo[i] = 0;
- if (command_fds[!i] < 0) /* both fds closed */
- return 0;
- }
- if (cbo[i] == COMMAND_BUF_SIZE - 1) {
- PARA_NOTICE_LOG("discarding overlong line\n");
- cbo[i] = 0;
- flags[i] = FELF_DISCARD_FIRST;
- }
+ close(command_fds[i]);
+ command_fds[i] = -1;
+ flags[i] = 0;
+ cbo[i] = 0;
+ if (command_fds[!i] < 0) /* both fds closed */
+ return;
}
- }
- ret = read_stat_pipe(&rfds);
- if (ret < 0) {
- PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
- close(stat_pipe);
- stat_pipe = -1;
- clear_all_items();
- free(stat_content[SI_BASENAME]);
- stat_content[SI_BASENAME] =
- para_strdup("stat command terminated!?");
- print_all_items();
- }
-check_return:
- switch (mode) {
- case COMMAND_MODE:
- ret = wgetch(top.win);
- if (ret != ERR && ret != KEY_RESIZE) {
- if (cmd_pid)
- kill(cmd_pid, SIGTERM);
- return -1;
+ if (cbo[i] == COMMAND_BUF_SIZE - 1) {
+ PARA_NOTICE_LOG("discarding overlong line");
+ cbo[i] = 0;
+ flags[i] = FELF_DISCARD_FIRST;
}
- break;
- case GETCH_MODE:
- ret = wgetch(top.win);
- if (ret != ERR && ret != KEY_RESIZE)
- return ret;
- break;
- case EXTERNAL_MODE:
- if (cmd_pid == 0)
- return 0;
}
- goto repeat;
+}
+
+static void input_pre_select(fd_set *rfds, int *max_fileno)
+{
+ enum cmd_status cmds = cmd_status();
+
+ if (cmds != CMDS_XCMD)
+ para_fd_set(STDIN_FILENO, rfds, max_fileno);
}
/* read from command pipe and print data to bot window */
goto fail;
command_fds[0] = fds[1];
command_fds[1] = fds[2];
- if (do_select(COMMAND_MODE) >= 0)
- PARA_INFO_LOG("command complete\n");
- else
- PARA_NOTICE_LOG("command aborted\n");
- print_in_bar(COLOR_MSG, " ");
return;
fail:
PARA_ERROR_LOG("%s\n", para_strerror(-ret));
if (cmd_pid)
return;
shutdown_curses();
- if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
+ para_exec_cmdline_pid(&cmd_pid, cmd, fds);
+}
+
+static void handle_command(int c)
+{
+ int i;
+
+ /* first check user-defined key bindings */
+ for (i = 0; i < conf.key_map_given; ++i) {
+ char *tmp, *handler, *arg;
+
+ tmp = para_strdup(conf.key_map_arg[i]);
+ if (!split_key_map(tmp, &handler, &arg)) {
+ free(tmp);
+ return;
+ }
+ if (strcmp(tmp, km_keyname(c))) {
+ free(tmp);
+ continue;
+ }
+ if (*handler == 'd')
+ display_cmd(arg);
+ else if (*handler == 'x')
+ external_cmd(arg);
+ else if (*handler == 'p')
+ para_cmd(arg);
+ else if (*handler == 'i') {
+ int num = find_cmd_byname(arg);
+ if (num >= 0)
+ command_list[num].handler();
+ }
+ free(tmp);
return;
- do_select(EXTERNAL_MODE);
- init_curses();
+ }
+ /* not found, check internal key bindings */
+ for (i = 0; command_list[i].handler; i++) {
+ if (!strcmp(km_keyname(c), command_list[i].key)) {
+ command_list[i].handler();
+ return;
+ }
+ }
+ print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
+ km_keyname(c));
+}
+
+static void input_post_select(void)
+{
+ int ret;
+ enum cmd_status cmds = cmd_status();
+
+ if (cmds == CMDS_XCMD)
+ return;
+ ret = wgetch(top.win);
+ if (ret == ERR || ret == KEY_RESIZE)
+ return;
+ if (cmds == CMDS_IDLE)
+ return handle_command(ret);
+ if (cmd_pid != 0)
+ kill(cmd_pid, SIGTERM);
+}
+
+static void signal_pre_select(fd_set *rfds, int *max_fileno)
+{
+ para_fd_set(signal_pipe, rfds, max_fileno);
+}
+
+/*
+ * This is the core select loop. It checks the following fds:
+ *
+ * - signal pipe
+ * - stdin
+ * - stdout/stderr of display or internal commands
+ */
+__noreturn static void do_select(void)
+{
+ fd_set rfds;
+ int ret, max_fileno;
+ struct timeval tv;
+
+repeat:
+ tv.tv_sec = conf.timeout_arg / 1000;
+ tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
+ FD_ZERO(&rfds);
+ max_fileno = 0;
+ status_pre_select(&rfds, &max_fileno, &tv);
+ signal_pre_select(&rfds, &max_fileno);
+ command_pre_select(&rfds, &max_fileno);
+ input_pre_select(&rfds, &max_fileno);
+ ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
+ if (ret <= 0)
+ goto repeat; /* skip fd checks */
+ signal_post_select(&rfds);
+ command_post_select(&rfds);
+ status_post_select(&rfds);
+ input_post_select();
+ goto repeat;
}
static void print_scroll_msg(void)
static void com_scroll_top(void)
{
- int i = RINGBUFFER_SIZE - 1;
+ int i = RINGBUFFER_SIZE - 1, bot_lines = get_num_lines(&bot);
unsigned lines = 0;
while (i > 0 && !ringbuffer_get(bot_win_rb, i))
i--;
/* i is oldest entry */
- for (; lines < bot.lines && i >= 0; i--) {
+ for (; lines < bot_lines && i >= 0; i--) {
struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
if (!rbe)
break;
static void com_page_down(void)
{
unsigned lines = 0;
- int i = scroll_position;
+ int i = scroll_position, bot_lines = get_num_lines(&bot);
- while (lines < bot.lines && --i > 0) {
+ while (lines < bot_lines && --i > 0) {
struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
if (!rbe)
break;
static void com_page_up(void)
{
unsigned lines;
- int fvr = first_visible_rbe(&lines);
+ int fvr = first_visible_rbe(&lines), bot_lines = get_num_lines(&bot);
if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
scroll_position = fvr + 1;
for (; scroll_position > 0; scroll_position--) {
first_visible_rbe(&lines);
- if (lines == bot.lines)
+ if (lines == bot_lines)
break;
}
redraw_bot_win();
static void com_scroll_down(void)
{
struct rb_entry *rbe;
- int rbe_lines;
+ int rbe_lines, bot_lines = get_num_lines(&bot);
if (!scroll_position) {
print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
rbe = ringbuffer_get(bot_win_rb, scroll_position);
rbe_lines = NUM_LINES(rbe->len);
wscrl(bot.win, rbe_lines);
- wmove(bot.win, bot.lines - rbe_lines, 0);
+ wmove(bot.win, bot_lines - rbe_lines, 0);
wattron(bot.win, COLOR_PAIR(rbe->color));
waddstr(bot.win, rbe->msg);
wrefresh(bot.win);
break;
rbe_lines = NUM_LINES(rbe->len);
lines += rbe_lines;
-// fprintf(stderr, "msg: %s\n", rbe->msg);
wattron(bot.win, COLOR_PAIR(rbe->color));
waddstr(bot.win, "\n");
waddstr(bot.win, rbe->msg);
print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
}
-/*
- * reread configuration, terminate on errors
- */
static void com_reread_conf(void)
{
- char *cf = configfile_exists();
- struct gui_cmdline_parser_params params = {
- .override = 1,
- .initialize = 1,
- .check_required = 0,
- .check_ambiguity = 0,
- .print_errors = 0,
- };
-
- if (!cf) {
- PARA_WARNING_LOG("there is no configuration to read\n");
- return;
- }
- PARA_INFO_LOG("rereading command line options and config file\n");
- gui_cmdline_parser_ext(_argc, _argv, &conf, ¶ms);
- /*
- * Despite .print_errors is set to 0, gengetopt will print to stderr
- * anyway, and exit on errors. So we have to shutdown curses first.
- */
- shutdown_curses();
- gui_cmdline_parser_config_file(cf, &conf, ¶ms);
- init_curses();
- PARA_NOTICE_LOG("config file reloaded\n");
- if (check_key_map_args() < 0)
- finish(EXIT_FAILURE);
+ reread_conf();
}
static void com_help(void)
static void com_shrink_top_win(void)
{
- if (top.lines <= theme.top_lines_min) {
+ int top_lines = get_num_lines(&top);
+
+ if (top_lines <= theme.top_lines_min) {
PARA_WARNING_LOG("can not decrease top window\n");
return;
}
- init_wins(top.lines - 1);
- wclear(top.win);
- print_all_items();
+ init_wins(top_lines - 1);
print_in_bar(COLOR_MSG, "%s", "decreased top window");
}
static void com_enlarge_top_win(void)
{
- if (bot.lines < 3) {
+ int top_lines = get_num_lines(&top), bot_lines = get_num_lines(&bot);
+
+ if (bot_lines < 3) {
PARA_WARNING_LOG("can not increase top window\n");
return;
}
- init_wins(top.lines + 1);
- wclear(top.win);
- print_all_items();
+ init_wins(top_lines + 1);
print_in_bar(COLOR_MSG, "increased top window");
}
__noreturn static void com_quit(void)
{
- finish(0);
+ die(EXIT_SUCCESS, "%s", "");
}
static void com_refresh(void)
init_curses();
}
-static void change_theme(int next)
-{
- if (next)
- next_theme(&theme);
- else
- prev_theme(&theme);
- /* This seems to be needed twice, why? */
- com_refresh();
- com_refresh();
- PARA_NOTICE_LOG("new theme: %s\n", theme.name);
-}
-
static void com_next_theme(void)
{
- change_theme(1);
+ theme_next(&theme);
+ com_refresh();
}
static void com_prev_theme(void)
{
- change_theme(0);
-}
-
-
-static void handle_command(int c)
-{
- int i;
-
- /* first check user-defined key bindings */
- for (i = 0; i < conf.key_map_given; ++i) {
- char *tmp, *handler, *arg;
-
- tmp = para_strdup(conf.key_map_arg[i]);
- if (!split_key_map(tmp, &handler, &arg)) {
- free(tmp);
- return;
- }
- if (strcmp(tmp, km_keyname(c))) {
- free(tmp);
- continue;
- }
- if (*handler == 'd')
- display_cmd(arg);
- else if (*handler == 'x')
- external_cmd(arg);
- else if (*handler == 'p')
- para_cmd(arg);
- else if (*handler == 'i') {
- int num = find_cmd_byname(arg);
- if (num >= 0)
- command_list[num].handler();
- }
- free(tmp);
- return;
- }
- /* not found, check internal key bindings */
- for (i = 0; command_list[i].handler; i++) {
- if (!strcmp(km_keyname(c), command_list[i].key)) {
- command_list[i].handler();
- return;
- }
- }
- print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
- km_keyname(c));
+ theme_prev(&theme);
+ com_refresh();
}
__noreturn static void print_help_and_die(void)
int main(int argc, char *argv[])
{
- int ret;
- char *cf;
-
- _argc = argc;
- _argv = argv;
-
gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
loglevel = get_loglevel_by_name(conf.loglevel_arg);
version_handle_flag("gui", conf.version_given);
if (conf.help_given || conf.detailed_help_given)
print_help_and_die();
- cf = configfile_exists();
- if (!cf && conf.config_file_given) {
- fprintf(stderr, "can not read config file %s\n",
- conf.config_file_arg);
- exit(EXIT_FAILURE);
- }
- if (cf) {
- struct gui_cmdline_parser_params params = {
- .override = 0,
- .initialize = 0,
- .check_required = 0,
- .check_ambiguity = 0,
- .print_errors = 1,
- };
- gui_cmdline_parser_config_file(cf, &conf, ¶ms);
- loglevel = get_loglevel_by_name(conf.loglevel_arg);
- }
- if (check_key_map_args() < 0) {
- fprintf(stderr, "invalid key map\n");
- exit(EXIT_FAILURE);
- }
- init_theme_or_die(conf.theme_arg, &theme);
+ parse_config_file_or_die(false /* override */);
setup_signal_handling();
bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
setlocale(LC_CTYPE, "");
initscr(); /* needed only once, always successful */
init_curses();
- for (;;) {
- print_status_bar();
- ret = do_select(GETCH_MODE);
- if (!ret)
- continue;
- print_in_bar(COLOR_MSG, " ");
- handle_command(ret);
- }
+ do_select();
}
projects / paraslash.git / blobdiff