1 files changed, 110 insertions, 0 deletions
diff --git a/src/util/unix_connect.c b/src/util/unix_connect.c
new file mode 100644
index 0000000..cbd8c0d
--- /dev/null
+++ b/src/util/unix_connect.c
@@ -0,0 +1,110 @@
+/*++
+/* NAME
+/*	unix_connect 3
+/* SUMMARY
+/*	connect to UNIX-domain listener
+/* SYNOPSIS
+/*	#include <connect.h>
+/*
+/*	int	unix_connect(addr, block_mode, timeout)
+/*	const char *addr;
+/*	int	block_mode;
+/*	int	timeout;
+/* DESCRIPTION
+/*	unix_connect() connects to a listener in the UNIX domain at the
+/*	specified address, and returns the resulting file descriptor.
+/*
+/*	Arguments:
+/* .IP addr
+/*	Null-terminated string with connection destination.
+/* .IP block_mode
+/*	Either NON_BLOCKING for a non-blocking socket, or BLOCKING for
+/*	blocking mode.
+/* .IP timeout
+/*	Bounds the number of seconds that the operation may take. Specify
+/*	a value <= 0 to disable the time limit.
+/* DIAGNOSTICS
+/*	The result is -1 in case the connection could not be made.
+/*	Fatal errors: other system call failures.
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/*	Wietse Venema
+/*	IBM T.J. Watson Research
+/*	P.O. Box 704
+/*	Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System interfaces. */
+
+#include <sys_defs.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+/* Utility library. */
+
+#include "msg.h"
+#include "iostuff.h"
+#include "sane_connect.h"
+#include "connect.h"
+#include "timed_connect.h"
+
+/* unix_connect - connect to UNIX-domain listener */
+
+int     unix_connect(const char *addr, int block_mode, int timeout)
+{
+#undef sun
+    struct sockaddr_un sun;
+    ssize_t len = strlen(addr);
+    int     sock;
+
+    /*
+     * Translate address information to internal form.
+     */
+    if (len >= sizeof(sun.sun_path))
+	msg_fatal("unix-domain name too long: %s", addr);
+    memset((void *) &sun, 0, sizeof(sun));
+    sun.sun_family = AF_UNIX;
+#ifdef HAS_SUN_LEN
+    sun.sun_len = len + 1;
+#endif
+    memcpy(sun.sun_path, addr, len + 1);
+
+    /*
+     * Create a client socket.
+     */
+    if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
+	return (-1);
+
+    /*
+     * Timed connect.
+     */
+    if (timeout > 0) {
+	non_blocking(sock, NON_BLOCKING);
+	if (timed_connect(sock, (struct sockaddr *) &sun, sizeof(sun), timeout) < 0) {
+	    close(sock);
+	    return (-1);
+	}
+	if (block_mode != NON_BLOCKING)
+	    non_blocking(sock, block_mode);
+	return (sock);
+    }
+
+    /*
+     * Maybe block until connected.
+     */
+    else {
+	non_blocking(sock, block_mode);
+	if (sane_connect(sock, (struct sockaddr *) &sun, sizeof(sun)) < 0
+	    && errno != EINPROGRESS) {
+	    close(sock);
+	    return (-1);
+	}
+	return (sock);
+    }
+}