Add helpers for initd socket

Signed-off-by: David Oberhollenzer <goliath@infraroot.at>

1 files changed, 46 insertions, 0 deletions

diff --git a/lib/init/init_socket_open.c b/lib/init/init_socket_open.c
new file mode 100644
index 0000000..d0cf168
--- /dev/null
+++ b/lib/init/init_socket_open.c
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: ISC */
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+
+#include "initsock.h"
+
+int init_socket_open(const char *tmppath)
+{
+	struct sockaddr_un un;
+	int fd;
+
+	fd = socket(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC, 0);
+	if (fd < 0) {
+		perror("socket");
+		return -1;
+	}
+
+	memset(&un, 0, sizeof(un));
+	un.sun_family = AF_UNIX;
+
+	strcpy(un.sun_path, tmppath);
+
+	if (bind(fd, (struct sockaddr *)&un, sizeof(un))) {
+		fprintf(stderr, "bind: %s: %s", tmppath, strerror(errno));
+		close(fd);
+		unlink(tmppath);
+		return -1;
+	}
+
+	memset(&un, 0, sizeof(un));
+	un.sun_family = AF_UNIX;
+
+	strcpy(un.sun_path, INIT_SOCK_PATH);
+
+	if (connect(fd, (struct sockaddr *)&un, sizeof(un))) {
+		perror("connect: " INIT_SOCK_PATH);
+		close(fd);
+		return -1;
+	}
+
+	return fd;
+}