/*
- * Copyright (C) 1998-2013 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 1998-2014 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
#include <sys/types.h>
#include <curses.h>
#include <locale.h>
+#include <sys/time.h>
#include "gui.cmdline.h"
#include "para.h"
#include "list.h"
#include "sched.h"
#include "signal.h"
+#include "ggo.h"
#include "version.h"
/** define the array of error lists needed by para_gui */
INIT_GUI_ERRLISTS;
static char *stat_content[NUM_STAT_ITEMS];
-#define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
-
static int signal_pipe;
-static struct win_data {
+static struct gui_window {
WINDOW *win;
size_t begx;
size_t begy;
static unsigned scroll_position;
-static int cmd_died, curses_active;
+static bool curses_active;
static pid_t cmd_pid;
-static int command_fds[2];
+static int command_fds[2] = {-1, -1};
static int stat_pipe = -1;
static struct gui_args_info conf;
enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
-#define COLOR_STATUSBAR 52
-#define COLOR_COMMAND 53
-#define COLOR_OUTPUT 54
-#define COLOR_MSG 55
-#define COLOR_ERRMSG 56
-#define COLOR_WELCOME 57
-#define COLOR_SEPARATOR 58
-#define COLOR_TOP 59
-#define COLOR_BOT 60
+/**
+ * Codes for various colors.
+ *
+ * Each status item has its own color pair. The ones defined here start at a
+ * higher number so that they do not overlap with these.
+ */
+enum gui_color_pair {
+ COLOR_STATUSBAR = NUM_STAT_ITEMS + 1,
+ COLOR_COMMAND,
+ COLOR_OUTPUT,
+ COLOR_MSG,
+ COLOR_ERRMSG,
+ COLOR_WELCOME,
+ COLOR_SEPARATOR,
+ COLOR_TOP,
+ COLOR_BOT,
+};
struct gui_command {
const char *key;
void (*handler)(void);
};
-struct stat_item {
- char name[MAXLINE];
- char prefix[MAXLINE];
- char postfix[MAXLINE];
- unsigned y;
- unsigned x;
- unsigned len;
- int fg, bg;
- int align;
- char content[MAXLINE];
-};
-
static struct gui_theme theme;
static int _argc;
return file_exists(tmp)? tmp: NULL;
}
-/*
- * print num spaces to curses window
- */
+/* Print given number of spaces to curses window. */
static void add_spaces(WINDOW* win, unsigned int num)
{
- while (num > 0) {
- num--;
- waddstr(win, " ");
+ char space[] = " ";
+ unsigned sz = sizeof(space) - 1; /* number of spaces */
+
+ while (num >= sz) {
+ waddstr(win, space);
+ num -= sz;
+ }
+ if (num > 0) {
+ assert(num < sz);
+ space[num] = '\0';
+ waddstr(win, space);
}
}
xvasprintf(&msg, fmt, ap);
va_end(ap);
wmove(in.win, 0, 0);
- align_str(in.win, msg, sb.cols, LEFT);
+ align_str(in.win, msg, in.cols, LEFT);
free(msg);
wrefresh(in.win);
}
-/*
- * update the status bar
- */
static void print_status_bar(void)
{
char *tmp;
- if (!curses_active)
- return;
- tmp = para_strdup(STANDARD_STATUS_BAR);
+ tmp = para_strdup("para_gui " PACKAGE_VERSION " (hit ? for help)");
wmove(sb.win, 0, 0);
align_str(sb.win, tmp, sb.cols, CENTER);
free(tmp);
- wrefresh(sb.win);
}
/*
* get the number of the oldest rbe that is (partially) visible. On return,
- * lines contains the sum of the number of lines of all visable entries. If the
+ * lines contains the sum of the number of lines of all visible entries. If the
* first one is only partially visible, lines is greater than bot.lines.
*/
static int first_visible_rbe(unsigned *lines)
static int add_output_line(char *line, void *data)
{
int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
+
if (!curses_active)
return 1;
rb_add_entry(color, para_strdup(line));
static int loglevel;
-__printf_2_3 void curses_log(int ll, const char *fmt,...)
+static __printf_2_3 void curses_log(int ll, const char *fmt,...)
{
int color;
char *msg;
para_install_sighandler(SIGCHLD);
para_install_sighandler(SIGWINCH);
para_install_sighandler(SIGUSR1);
- para_sigaction(SIGHUP, SIG_IGN);
}
-__noreturn static void do_exit(int ret)
+/* 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);
if (!curses_active)
return;
def_prog_mode();
- curses_active = 0;
+ curses_active = false;
endwin();
}
__noreturn static void finish(int ret)
{
shutdown_curses();
- do_exit(ret);
+ kill_pg_and_die(ret);
}
/*
va_start(argp, fmt);
vfprintf(outfd, fmt, argp);
va_end(argp);
- do_exit(ret);
+ kill_pg_and_die(ret);
}
static void print_welcome(void)
{
if (loglevel > LL_NOTICE)
return;
- outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
- " \"" CODENAME "\". Theme: %s", theme.name);
+ outputf(COLOR_WELCOME, "Welcome to %s. Theme: %s",
+ version_single_line("gui"), theme.name);
wclrtoeol(bot.win);
}
keypad(bot.win, 1);
keypad(sb.win, 1);
keypad(in.win, 1);
- print_status_bar();
}
wmove(sep.win, 0, 0);
for (i = 1; i <= COLS; i++)
//wclear(bot.win);
wnoutrefresh(top.win);
wnoutrefresh(bot.win);
- //wnoutrefresh(sb.win);
print_status_bar();
+ wnoutrefresh(sb.win);
wnoutrefresh(in.win);
wnoutrefresh(sep.win);
doupdate();
/* (Re-)initialize the curses library. */
static void init_curses(void)
{
- curses_active = 1;
- if (top.win && refresh() == ERR) /* refesh is really needed */
+ curses_active = true;
+ if (top.win && refresh() == ERR) /* refresh is really needed */
msg_n_exit(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"
{
int ret;
pid_t pid;
+
reap_next_child:
ret = para_reap_child(&pid);
if (ret <= 0)
return;
- if (pid == cmd_pid) {
+ if (pid == cmd_pid)
cmd_pid = 0;
- cmd_died = 1;
- }
goto reap_next_child;
}
for (i = 0; i < conf.key_map_given; ++i) {
s = conf.key_map_arg[i];
if (!(*s))
- goto err_out;
+ goto out;
free(tmp);
tmp = para_strdup(s);
if (!split_key_map(tmp, &handler, &arg))
- goto err_out;
+ goto out;
if (strlen(handler) != 1)
- goto err_out;
+ goto out;
if (*handler != 'x'
&& *handler != 'd'
&& *handler != 'i'
&& *handler != 'p')
- goto err_out;
+ goto out;
if (*handler != 'i')
continue;
if (find_cmd_byname(arg) < 0)
- goto err_out;
+ goto out;
}
ret = 0;
-err_out:
+out:
free(tmp);
return ret;
}
}
return;
case SIGINT:
- PARA_WARNING_LOG("caught SIGINT, reset");
+ PARA_WARNING_LOG("caught SIGINT, reset\n");
/* Nothing to do. SIGINT killed our child which gets noticed
* by do_select and resets everything.
*/
return;
case SIGUSR1:
- PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
+ PARA_NOTICE_LOG("got SIGUSR1, rereading configuration\n");
com_reread_conf();
return;
case SIGCHLD:
}
}
-static int open_stat_pipe(void)
+static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
{
- static int init = 1;
+ static struct timeval next_exec, atm, diff;
int ret, fds[3] = {0, 1, 0};
pid_t pid;
- if (init)
- init = 0;
- else
- /*
- * Sleep a bit to avoid a busy loop. As the call to sleep() may
- * be interrupted by SIGCHLD, we simply wait until the call
- * succeeds.
- */
- while (sleep(2))
- ; /* nothing */
+ 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;
+ return;
ret = mark_fd_nonblocking(fds[1]);
- if (ret >= 0)
- return fds[1];
- close(fds[1]);
- return ret;
+ if (ret < 0) {
+ close(fds[1]);
+ return;
+ }
+ stat_pipe = fds[1];
+success:
+ para_fd_set(stat_pipe, rfds, max_fileno);
}
-#define COMMAND_BUF_SIZE 4096
+#define COMMAND_BUF_SIZE 32768
/*
* This is the core select loop. Besides the (internal) signal
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() */
repeat:
tv.tv_sec = conf.timeout_arg / 1000;
// ret = refresh_status();
FD_ZERO(&rfds);
max_fileno = 0;
- if (stat_pipe < 0)
- stat_pipe = open_stat_pipe();
- if (stat_pipe >= 0)
- para_fd_set(stat_pipe, &rfds, &max_fileno);
+ status_pre_select(&rfds, &max_fileno, &tv);
/* signal pipe */
para_fd_set(signal_pipe, &rfds, &max_fileno);
/* command pipe only for COMMAND_MODE */
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 */
COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
cbo[i] += sz;
sz = cbo[i];
- cbo[i] = for_each_line(command_buf[i], cbo[i],
+ cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
add_output_line, &i);
- if (sz != cbo[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",
+ PARA_NOTICE_LOG("closing command fd %d: %s\n",
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;
+ }
}
}
ret = read_stat_pipe(&rfds);
case COMMAND_MODE:
ret = wgetch(top.win);
if (ret != ERR && ret != KEY_RESIZE) {
- if (command_fds[0] >= 0) {
- close(command_fds[0]);
- command_fds[0] = -1;
- }
- if (command_fds[1] >= 0) {
- close(command_fds[1]);
- command_fds[1] = -1;
- }
if (cmd_pid)
kill(cmd_pid, SIGTERM);
return -1;
return ret;
break;
case EXTERNAL_MODE:
- if (cmd_died) {
- cmd_died = 0;
+ if (cmd_pid == 0)
return 0;
- }
}
goto repeat;
}
-/*
- * read from command pipe and print data to bot window
- */
-static void send_output(void)
+/* read from command pipe and print data to bot window */
+static void exec_and_display_cmd(const char *cmd)
{
- int ret;
+ int ret, fds[3] = {0, 1, 1};
- ret = mark_fd_nonblocking(command_fds[0]);
+ outputf(COLOR_COMMAND, "%s", cmd);
+ ret = para_exec_cmdline_pid(&cmd_pid, cmd, fds);
+ if (ret < 0)
+ return;
+ ret = mark_fd_nonblocking(fds[1]);
if (ret < 0)
goto fail;
- ret = mark_fd_nonblocking(command_fds[1]);
+ ret = mark_fd_nonblocking(fds[2]);
if (ret < 0)
goto fail;
+ command_fds[0] = fds[1];
+ command_fds[1] = fds[2];
if (do_select(COMMAND_MODE) >= 0)
- PARA_INFO_LOG("command complete");
+ PARA_INFO_LOG("command complete\n");
else
- PARA_NOTICE_LOG("command aborted");
+ PARA_NOTICE_LOG("command aborted\n");
print_in_bar(COLOR_MSG, " ");
return;
fail:
static void para_cmd(char *cmd)
{
- int ret, fds[3] = {0, 1, 1};
- char *c = make_message(BINDIR "/para_client -- %s", cmd);
+ char *c;
- outputf(COLOR_COMMAND, "%s", c);
print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
- ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
+ c = make_message(BINDIR "/para_client -- %s", cmd);
+ exec_and_display_cmd(c);
free(c);
- if (ret < 0)
- return;
- command_fds[0] = fds[1];
- command_fds[1] = fds[2];
- send_output();
}
-/*
- * exec command and print output to bot win
- */
static void display_cmd(char *cmd)
{
- int fds[3] = {0, 1, 1};
-
print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
- outputf(COLOR_COMMAND, "%s", cmd);
- if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
- return;
- command_fds[0] = fds[1];
- command_fds[1] = fds[2];
- send_output();
+ exec_and_display_cmd(cmd);
}
/*
shutdown_curses();
if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
return;
- cmd_died = 0;
do_select(EXTERNAL_MODE);
init_curses();
}
{
unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
int first_rbe = first_visible_rbe(&lines_total);
+
print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
filled - scroll_position, ringbuffer_filled(bot_win_rb));
}
{
unsigned lines = 0;
int i = scroll_position;
+
while (lines < bot.lines && --i > 0) {
struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
if (!rbe)
*/
static void com_reread_conf(void)
{
- char *cf =configfile_exists();
+ char *cf = configfile_exists();
struct gui_cmdline_parser_params params = {
.override = 1,
.initialize = 1,
};
if (!cf) {
- PARA_WARNING_LOG("there is no configuration to read");
+ PARA_WARNING_LOG("there is no configuration to read\n");
return;
}
- PARA_INFO_LOG("rereading command line options and config file");
+ PARA_INFO_LOG("rereading command line options and config file\n");
gui_cmdline_parser_ext(_argc, _argv, &conf, ¶ms);
- if (gui_cmdline_parser_config_file(cf, &conf, ¶ms) != 0) {
- PARA_EMERG_LOG("errors in config file");
- finish(EXIT_FAILURE);
- }
- PARA_NOTICE_LOG("config file reloaded");
+ /*
+ * 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);
}
static void com_shrink_top_win(void)
{
if (top.lines <= theme.top_lines_min) {
- PARA_WARNING_LOG("can not decrease top window");
+ PARA_WARNING_LOG("can not decrease top window\n");
return;
}
init_wins(top.lines - 1);
static void com_enlarge_top_win(void)
{
if (bot.lines < 3) {
- PARA_WARNING_LOG("can not increase top window");
+ PARA_WARNING_LOG("can not increase top window\n");
return;
}
init_wins(top.lines + 1);
static void com_version(void)
{
- print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
- CODENAME "\"");
+ print_in_bar(COLOR_MSG, "%s", version_single_line("gui"));
}
__noreturn static void com_quit(void)
/* This seems to be needed twice, why? */
com_refresh();
com_refresh();
- PARA_NOTICE_LOG("new theme: %s", theme.name);
+ PARA_NOTICE_LOG("new theme: %s\n", theme.name);
}
static void com_next_theme(void)
{
int i;
- /* first check user's key bindings */
+ /* first check user-defined key bindings */
for (i = 0; i < conf.key_map_given; ++i) {
char *tmp, *handler, *arg;
km_keyname(c));
}
+__noreturn static void print_help_and_die(void)
+{
+ struct ggo_help h = DEFINE_GGO_HELP(gui);
+ bool d = conf.detailed_help_given;
+
+ ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
+ exit(0);
+}
+
int main(int argc, char *argv[])
{
int ret;
_argv = argv;
gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
- HANDLE_VERSION_FLAG("gui", conf);
+ 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",
.check_ambiguity = 0,
.print_errors = 1,
};
- if (gui_cmdline_parser_config_file(cf, &conf, ¶ms) != 0)
- exit(EXIT_FAILURE);
+ gui_cmdline_parser_config_file(cf, &conf, ¶ms);
+ loglevel = get_loglevel_by_name(conf.loglevel_arg);
}
- 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);
- top.lines = theme.top_lines_default;
setup_signal_handling();
bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
setlocale(LC_CTYPE, "");
projects / paraslash.git / blobdiff