Add check for working AF_LOCAL sockets, which are borken

on RH7.0 with _LARGEFILE64_SOURCE, and probably not
present on non-Unix systems like VMS.
(This used to be commit 8b0a5bc436fb44f5123d037b102f2d2c4d3287e8)

2 files changed, 94 insertions, 0 deletions

diff --git a/source3/tests/.cvsignore b/source3/tests/.cvsignore
index e69de29bb2..b6c1f01120 100644
--- a/source3/tests/.cvsignore
+++ b/source3/tests/.cvsignore
@@ -0,0 +1 @@
+unixsock
diff --git a/source3/tests/unixsock.c b/source3/tests/unixsock.c
new file mode 100644
index 0000000000..f2765d68f6
--- /dev/null
+++ b/source3/tests/unixsock.c
@@ -0,0 +1,93 @@
+/* -*- c-file-style: "linux" -*-
+ *
+ * Try creating a Unix-domain socket, opening it, and reading from it.
+ * The POSIX name for these is AF_LOCAL/PF_LOCAL.
+ *
+ * This is used by the Samba autoconf scripts to detect systems which
+ * don't have Unix-domain sockets, such as (probably) VMS, or systems
+ * on which they are broken under some conditions, such as RedHat 7.0
+ * (unpatched).  We can't build WinBind there at the moment.
+ *
+ * Coding standard says to always use exit() for this, not return, so
+ * we do.
+ *
+ * Martin Pool <mbp@samba.org>, June 2000. */
+
+/* TODO: Look for AF_LOCAL (most standard), AF_UNIX, and AF_FILE. */
+
+#include <stdio.h>
+
+#ifdef HAVE_SYS_SOCKET_H
+#  include <sys/socket.h>
+#endif
+
+#ifdef HAVE_SYS_UN_H
+#  include <sys/un.h>
+#endif
+
+#ifdef HAVE_SYS_TYPES_H
+#  include <sys/types.h>
+#endif
+
+#if HAVE_SYS_WAIT_H
+# include <sys/wait.h>
+#endif
+
+#if HAVE_ERRNO_DECL
+# include <errno.h>
+#else
+extern int errno;
+#endif
+
+static int bind_socket(char const *filename)
+{
+	int sock_fd;
+	struct sockaddr_un name;
+	size_t size;
+	
+	/* Create the socket. */
+	if ((sock_fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) {
+		perror ("socket(PF_LOCAL, SOCK_STREAM)");
+		exit(1);
+	}
+     
+	/* Bind a name to the socket. */
+	name.sun_family = AF_LOCAL;
+	strncpy(name.sun_path, filename, sizeof (name.sun_path));
+     
+       /* The size of the address is
+          the offset of the start of the filename,
+          plus its length,
+          plus one for the terminating null byte.
+          Alternatively you can just do:
+          size = SUN_LEN (&name);
+      */
+	size = SUN_LEN(&name);
+	/* XXX: This probably won't work on unfriendly libcs */
+     
+	if (bind(sock_fd, (struct sockaddr *) &name, size) < 0) {
+		perror ("bind");
+		exit(1);
+	}
+
+	return sock_fd;
+}
+
+
+int main(void)
+{
+	int sock_fd;
+	int kid;
+	char const *filename = "conftest.unixsock.sock";
+
+	/* abolish hanging */
+	alarm(15);		/* secs */
+
+	if ((sock_fd = bind_socket(filename)) < 0)
+		exit(1);
+
+	/* the socket will be deleted when autoconf cleans up these
+           files. */
+
+	exit(0);
+}