added udev helper

2 files changed, 88 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 5d7c1c2..74263d0 100644
--- a/Makefile
+++ b/Makefile
@@ -9,6 +9,7 @@ SYSTEMD_LIBS   = $(shell ${PKG_CONFIG} --libs libsystemd-daemon || echo "libsyst
 
 SOCKET_PATH = /var/run/vdr/inputdev
 
+AM_CFLAGS   = -DSOCKET_PATH=\"${SOCKET_PATH}\"
 AM_CXXFLAGS = -DPACKAGE_VERSION=\"${VERSION}\" -DSOCKET_PATH=\"${SOCKET_PATH}\" ${SYSTEMD_CFLAGS}
 AM_CXXFLAGS +=  -D_FORTIFY_SOURCE=2 -Wall -Werror
 
@@ -92,6 +93,9 @@ i18n: $(I18Nmsgs) $(I18Npot)
 
 ### Targets:
 
+vdr-inputdev:	udevhelper.c
+	$(CC) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) $^ -o $@
+
 libvdr-$(PLUGIN).so: $(OBJS)
 	$(CXX) $(LDFLAGS) -shared $(OBJS) $(LIBS) -o $@
 	@cp --remove-destination $@ $(LIBDIR)/$@.$(APIVERSION)
diff --git a/udevhelper.c b/udevhelper.c
new file mode 100644
index 0000000..04cf146
--- /dev/null
+++ b/udevhelper.c
@@ -0,0 +1,84 @@
+/*	--*- c -*--
+ * Copyright (C) 2012 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
+ *
+ * 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; version 3 of the License.
+ *
+ * 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 <sysexits.h>
+#include <unistd.h>
+#include <alloca.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+int main(int argc, char *argv[])
+{
+	struct sockaddr_un	addr = {
+		.sun_family	=  AF_UNIX,
+		.sun_path	=  SOCKET_PATH,
+	};
+
+	int			fd;
+	char			*cmd;
+	char const		*dev;
+	char const		*action = getenv("ACTION");
+	ssize_t			l;
+	bool			is_add;
+
+	if (argc < 2) {
+		fprintf(stderr, "missing device name\n");
+		return EX_USAGE;
+	}
+
+	if (argc > 2) {
+		strncpy(addr.sun_path, argv[2], sizeof addr.sun_path - 1);
+		/* string is terminated by initial assignment */
+	}
+
+	fd = socket(AF_UNIX, SOCK_DGRAM, 0);
+	if (fd < 0) {
+		perror("socket()");
+		return EX_OSERR;
+	}
+
+	dev = argv[1];
+	if (strncmp(dev, "input/", 6) == 0)
+		dev += 6;
+
+	if (action == NULL)
+		action = "add";
+
+	cmd = alloca(strlen(action) + sizeof(" \n") + strlen(dev));
+	strcpy(cmd, action);
+	strcat(cmd, " ");
+	strcat(cmd, dev);
+	strcat(cmd, "\n");
+
+	l = sendto(fd, cmd, strlen(cmd), 0, (void *)&addr, sizeof addr);
+	close(fd);
+
+	if (l < 0) {
+		perror("sendto()");
+		return EX_OSERR;
+	}
+
+	if (l != strlen(cmd)) {
+		fprintf(stderr, "not all data sent\n");
+		return EX_OSERR;
+	}
+
+	return EX_OK;
+}