Added C program which creates sockets

1 files changed, 37 insertions, 0 deletions

diff --git a/yarns/sockbind.c b/yarns/sockbind.c
new file mode 100644
index 0000000..2f656ba
--- /dev/null
+++ b/yarns/sockbind.c
@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+/*
+ * There is currently no command within Busybox or otherwise to create named
+ * UNIX sockets; this program is used to compensate for that.
+ */
+
+int main(int argc, char *argv[])
+{
+	int sfd, len;
+	struct sockaddr_un sock = { .sun_family = AF_UNIX };
+
+	if (argc != 2) {
+		fprintf(stderr, "Usage: %s PATH\n", argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	len = sizeof(sock) - offsetof(struct sockaddr_un, sun_path);
+	strncpy(sock.sun_path, argv[1], len);
+
+	if ((sfd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
+		perror("socket");
+		return EXIT_FAILURE;
+	}
+
+	if (bind(sfd, (struct sockaddr*)&sock, sizeof(sock)) == -1) {
+		perror("bind");
+		return EXIT_FAILURE;
+	}
+
+	return EXIT_SUCCESS;
+}