1 files changed, 115 insertions, 0 deletions
diff --git a/src/util/stream_send_fd.c b/src/util/stream_send_fd.c
new file mode 100644
index 0000000..0a9aebf
--- /dev/null
+++ b/src/util/stream_send_fd.c
@@ -0,0 +1,115 @@
+/*++
+/* NAME
+/*	stream_send_fd 3
+/* SUMMARY
+/*	send file descriptor
+/* SYNOPSIS
+/*	#include <iostuff.h>
+/*
+/*	int	stream_send_fd(fd, sendfd)
+/*	int	fd;
+/*	int	sendfd;
+/* DESCRIPTION
+/*	stream_send_fd() sends a file descriptor over the specified
+/*	stream.
+/*
+/*	Arguments:
+/* .IP fd
+/*	File descriptor that connects the sending and receiving processes.
+/* .IP sendfd
+/*	The file descriptor to be sent.
+/* DIAGNOSTICS
+/*	stream_send_fd() returns -1 upon failure.
+/* 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 library. */
+
+#include <sys_defs.h>			/* includes <sys/types.h> */
+
+#ifdef STREAM_CONNECTIONS
+
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stropts.h>
+
+#endif
+
+/* Utility library. */
+
+#include <msg.h>
+#include <iostuff.h>
+
+/* stream_send_fd - send file descriptor */
+
+int     stream_send_fd(int fd, int sendfd)
+{
+#ifdef STREAM_CONNECTIONS
+    const char *myname = "stream_send_fd";
+
+    if (ioctl(fd, I_SENDFD, sendfd) < 0)
+	msg_fatal("%s: send file descriptor %d: %m", myname, sendfd);
+    return (0);
+#else
+            msg_fatal("stream connections are not implemented");
+#endif
+}
+
+#ifdef TEST
+
+ /*
+  * Proof-of-concept program. Open a file and send the descriptor, presumably
+  * to the stream_recv_fd test program.
+  */
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <split_at.h>
+#include <connect.h>
+
+int     main(int argc, char **argv)
+{
+    char   *transport;
+    char   *endpoint;
+    char   *path;
+    int     server_sock;
+    int     client_fd;
+
+    if (argc < 3
+	|| (endpoint = split_at(transport = argv[1], ':')) == 0
+	|| *endpoint == 0 || *transport == 0)
+	msg_fatal("usage: %s transport:endpoint file...", argv[0]);
+
+    if (strcmp(transport, "stream") == 0) {
+	server_sock = stream_connect(endpoint, BLOCKING, 0);
+    } else {
+	msg_fatal("invalid transport name: %s", transport);
+    }
+    if (server_sock < 0)
+	msg_fatal("connect %s:%s: %m", transport, endpoint);
+
+    argv += 2;
+    while ((path = *argv++) != 0) {
+	if ((client_fd = open(path, O_RDONLY, 0)) < 0)
+	    msg_fatal("open %s: %m", path);
+	msg_info("path=%s client_fd=%d", path, client_fd);
+	if (stream_send_fd(server_sock, client_fd) < 0)
+	    msg_fatal("send file descriptor: %m");
+	if (close(client_fd) != 0)
+	    msg_fatal("close(%d): %m", client_fd);
+    }
+    exit(0);
+}
+
+#endif