- added new interactive GUI config program for spacenavd

git-svn-id: svn+ssh://svn.code.sf.net/p/spacenav/code/spnavcfg@22 ef983eb1-d774-4af8-acfd-baaf7b16a646

.gitattributes

@@ -0,0 +1 @@
+*.png filter=lfs diff=lfs merge=lfs -text

Makefile

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+PREFIX = /usr/local
+
+obj = spnavcfg.o front.o back.o ../spacenavd/cfgfile.o
+bin = spnavcfg
+
+CC = gcc
+INSTALL = install
+CFLAGS = -pedantic -Wall -g -I../spacenavd `pkg-config --cflags gtk+-2.0`
+LDFLAGS = `pkg-config --libs gtk+-2.0`
+
+$(bin): $(obj)
+	$(CC) -o $@ $(obj) $(LDFLAGS)
+
+.PHONY: clean
+clean:
+	rm -f $(obj) $(bin)
+
+.PHONY: install
+install:
+	$(INSTALL) -d $(PREFIX)/bin
+	$(INSTALL) -m 4775 $(bin) $(PREFIX)/bin/$(bin)
+
+.PHONY: uninstall
+uninstall:
+	rm -f $(PREFIX)/bin/$(bin)

back.c

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+/*
+spnavcfg - an interactive GUI configurator for the spacenavd daemon.
+Copyright (C) 2007 John Tsiombikas <nuclear@siggraph.org>
+
+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.
+
+This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <errno.h>
+#include <ctype.h>
+#include <unistd.h>
+#include "cfgfile.h"
+#include "cmd.h"
+
+#define CFGFILE		"/etc/spnavrc"
+
+int get_daemon_pid(void);
+static int update_cfg(void);
+static void sig(int s);
+
+static struct cfg cfg;
+static int dpid = -1;
+
+int backend(int pfd)
+{
+	signal(SIGTERM, sig);
+
+	for(;;) {
+		ssize_t res;
+		int cmd;
+
+		/* get command */
+		if(read(pfd, &cmd, 1) == -1 && errno != EINTR) {
+			perror("pipe read blew up in my face! wtf");
+			return -1;
+		}
+
+		switch(cmd) {
+		case CMD_PING:
+			kill(getppid(), ((dpid = get_daemon_pid()) == -1) ? SIGUSR2 : SIGUSR1);
+			break;
+
+		case CMD_CFG:
+			{
+				char *buf = (char*)&cfg;
+				int sz = sizeof cfg;
+
+				while(sz && (res = read(pfd, buf, sz)) > 0) {
+					buf += res;
+					sz -= res;
+				}
+				update_cfg();
+			}
+			break;
+
+		case CMD_STARTX:
+		case CMD_STOPX:
+			if(dpid == -1) {
+				if((dpid = get_daemon_pid()) == -1) {
+					return -1;
+				}
+			}
+			if(kill(dpid, cmd == CMD_STARTX ? SIGUSR1 : SIGUSR2) == -1) {
+				if(errno != EPERM) {
+					dpid = -1;
+					kill(getppid(), SIGUSR2);
+				}
+			}
+			break;
+
+		default:
+			break;
+		}
+	}
+
+	return 0;
+}
+
+int get_daemon_pid(void)
+{
+	FILE *fp;
+	char buf[64];
+
+	if(!(fp = fopen("/tmp/.spnavd.pid", "r"))) {
+		fprintf(stderr, "no spacenav pid file, can't find daemon\n");
+		return -1;
+	}
+	fgets(buf, sizeof buf, fp);
+	fclose(fp);
+
+	if(!isdigit(buf[0])) {
+		fprintf(stderr, "fucked up pidfile, can't find daemon\n");
+		return -1;
+	}
+	return atoi(buf);
+}
+
+static int update_cfg(void)
+{
+	if(write_cfg(CFGFILE, &cfg) == -1) {
+		return -1;
+	}
+
+	if(dpid == -1) {
+		if((dpid = get_daemon_pid()) == -1) {
+			return -1;
+		}
+	}
+	
+	if(kill(dpid, SIGHUP) == -1 && errno != EPERM) {
+		dpid = -1;	/* invalidate pid, will be searched again next time */
+		return -1;
+	}
+
+	return 0;
+}
+
+static void sig(int s)
+{
+	_exit(0);
+}

cmd.h

@@ -0,0 +1,28 @@
+/*
+spnavcfg - an interactive GUI configurator for the spacenavd daemon.
+Copyright (C) 2007 John Tsiombikas <nuclear@siggraph.org>
+
+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.
+
+This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef CMD_H_
+#define CMD_H_
+
+enum {
+	CMD_PING,		/* check daemon status */
+	CMD_CFG,		/* update configuration (and HUP daemon) */
+	CMD_STARTX,		/* signal daemon to enable X protocol */
+	CMD_STOPX		/* yada yada stop X protocol */
+};
+
+#endif	/* CMD_H_ */

front.c

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+/*
+spnavcfg - an interactive GUI configurator for the spacenavd daemon.
+Copyright (C) 2007 John Tsiombikas <nuclear@siggraph.org>
+
+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.
+
+This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
+#include <gtk/gtk.h>
+#include "cfgfile.h"
+#include "cmd.h"
+
+#define CFGFILE		"/etc/spnavrc"
+
+static void update_cfg(void);
+static void layout(void);
+static void sig(int s);
+static void chk_handler(GtkToggleButton *bn, void *data);
+static void slider_handler(GtkRange *rng, void *data);
+
+static void add_child(GtkWidget *parent, GtkWidget *child);
+static GtkWidget *create_vbox(GtkWidget *parent);
+static GtkWidget *create_hbox(GtkWidget *parent);
+
+static GtkWidget *win;
+
+static struct cfg cfg;
+static int pipe_fd;
+
+void frontend(int pfd)
+{
+	int argc = 0;
+	int ruid = getuid();
+#ifdef __linux__
+	int setresuid(uid_t ruid, uid_t euid, uid_t suid);
+	setresuid(ruid, ruid, ruid);
+#else
+	seteuid(ruid);
+#endif
+
+	pipe_fd = pfd;
+
+	signal(SIGUSR1, sig);
+	signal(SIGUSR2, sig);
+
+	gtk_init(&argc, 0);
+
+	read_cfg(CFGFILE, &cfg);
+
+	win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+	gtk_window_set_title(GTK_WINDOW(win), "spacenavd configuration");
+	g_signal_connect(G_OBJECT(win), "delete_event", G_CALLBACK(gtk_main_quit), 0);
+	gtk_container_set_border_width(GTK_CONTAINER(win), 4);
+
+	layout();
+
+	gtk_widget_show_all(win);
+
+	gtk_main();
+}
+
+static void update_cfg(void)
+{
+	int cmd = CMD_CFG;
+	write(pipe_fd, &cmd, 1);
+	write(pipe_fd, &cfg, sizeof cfg);
+}
+
+static void layout(void)
+{
+	int i;
+	GtkWidget *w;
+	GtkWidget *vbox, *hbox, *bbox, *tbl, *frm;
+
+	vbox = create_vbox(win);
+
+	frm = gtk_frame_new("invert axis");
+	add_child(vbox, frm);
+
+	tbl = gtk_table_new(3, 4, FALSE);
+	add_child(frm, tbl);
+
+	gtk_table_attach_defaults(GTK_TABLE(tbl), gtk_label_new("X"), 1, 2, 0, 1);
+	gtk_table_attach_defaults(GTK_TABLE(tbl), gtk_label_new("Y"), 2, 3, 0, 1);
+	gtk_table_attach_defaults(GTK_TABLE(tbl), gtk_label_new("Z"), 3, 4, 0, 1);
+	gtk_table_attach_defaults(GTK_TABLE(tbl), gtk_label_new("translation"), 0, 1, 1, 2);
+	gtk_table_attach_defaults(GTK_TABLE(tbl), gtk_label_new("rotation"), 0, 1, 2, 3);
+
+	for(i=0; i<6; i++) {
+		int x = i % 3 + 1;
+		int y = i / 3 + 1;
+		w = gtk_check_button_new();
+		gtk_table_attach_defaults(GTK_TABLE(tbl), w, x, x + 1, y, y + 1);
+		g_signal_connect(G_OBJECT(w), "toggled", G_CALLBACK(chk_handler), (void*)i);
+	}
+
+	/*hbox = create_hbox(vbox);*/
+	frm = gtk_frame_new("sensitivity");
+	add_child(vbox, frm);
+
+	w = gtk_hscale_new_with_range(0.0, 4.0, 0.1);
+	gtk_range_set_update_policy(GTK_RANGE(w), GTK_UPDATE_DELAYED);
+	gtk_range_set_value(GTK_RANGE(w), cfg.sensitivity);
+	gtk_scale_set_value_pos(GTK_SCALE(w), GTK_POS_RIGHT);
+	g_signal_connect(G_OBJECT(w), "value_changed", G_CALLBACK(slider_handler), 0);
+	add_child(frm, w);
+
+	bbox = gtk_hbutton_box_new();
+	add_child(vbox, bbox);
+
+	/*w = gtk_button_new_from_stock(GTK_STOCK_APPLY);
+	g_signal_connect(G_OBJECT(w), "clicked", G_CALLBACK(bn_handler), 0);
+	add_child(bbox, w);*/
+
+	w = gtk_button_new_from_stock(GTK_STOCK_CLOSE);
+	g_signal_connect(G_OBJECT(w), "clicked", G_CALLBACK(gtk_main_quit), 0);
+	add_child(bbox, w);
+}
+
+static void sig(int s)
+{
+	GtkWidget *dlg;
+
+	switch(s) {
+	case SIGUSR1:	/* daemon alive */
+		dlg = gtk_message_dialog_new(GTK_WINDOW(win), GTK_DIALOG_DESTROY_WITH_PARENT,
+				GTK_MESSAGE_INFO, GTK_BUTTONS_CLOSE, "The spacenavd driver is running fine.");
+		g_signal_connect_swapped(dlg, "response", G_CALLBACK(gtk_widget_destroy), dlg);
+		break;
+
+	case SIGUSR2:	/* daemon dead */
+		dlg = gtk_message_dialog_new(GTK_WINDOW(win), GTK_DIALOG_DESTROY_WITH_PARENT,
+				GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE, "The driver isn't running at the moment.\n"
+				"You can still modify the configuration through this panel though.");
+		g_signal_connect_swapped(dlg, "response", G_CALLBACK(gtk_widget_destroy), dlg);
+		break;
+
+	default:
+		break;
+	}
+}
+
+static void chk_handler(GtkToggleButton *bn, void *data)
+{
+	int which = (int)data;
+	int state = gtk_toggle_button_get_active(bn);
+
+	cfg.invert[which] = state;
+	update_cfg();
+}
+
+static void slider_handler(GtkRange *rng, void *data)
+{
+	cfg.sensitivity = gtk_range_get_value(rng);
+	update_cfg();
+}
+
+
+static void add_child(GtkWidget *parent, GtkWidget *child)
+{
+	if(GTK_IS_BOX(parent)) {
+		gtk_box_pack_start(GTK_BOX(parent), child, TRUE, TRUE, 3);
+	} else if(GTK_CONTAINER(parent)) {
+		gtk_container_add(GTK_CONTAINER(parent), child);
+	} else {
+		fprintf(stderr, "failed to add child\n");
+	}
+}
+
+static GtkWidget *create_vbox(GtkWidget *parent)
+{
+	GtkWidget *box = gtk_vbox_new(FALSE, 5);
+	add_child(parent, box);
+	return box;
+}
+
+static GtkWidget *create_hbox(GtkWidget *parent)
+{
+	GtkWidget *box = gtk_hbox_new(FALSE, 5);
+	add_child(parent, box);
+	return box;
+}

spnavcfg.c

@@ -0,0 +1,56 @@
+/*
+spnavcfg - an interactive GUI configurator for the spacenavd daemon.
+Copyright (C) 2007 John Tsiombikas <nuclear@siggraph.org>
+
+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.
+
+This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+void frontend(int pfd);
+void backend(int pfd);
+
+static void sig(int s);
+
+int main(int argc, char **argv)
+{
+	int cpid;
+	int pipefd[2];
+
+	signal(SIGCHLD, sig);
+
+	pipe(pipefd);
+	if((cpid = fork()) == 0) {
+		/* child should be the setuid-root backend, write cfg and kill */
+		close(pipefd[1]);
+		backend(pipefd[0]);
+		_exit(0);
+	} else {
+		/* parent, GUI frontend */
+		close(pipefd[0]);
+		frontend(pipefd[1]);
+		kill(cpid, SIGTERM);
+	}
+	return 0;
+}
+
+static void sig(int s)
+{
+	if(s == SIGCHLD) {
+		wait(0);
+	}
+}