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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 12:06:34 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 12:06:34 +0000
commit5e61585d76ae77fd5e9e96ebabb57afa4d74880d (patch)
tree2b467823aaeebc7ef8bc9e3cabe8074eaef1666d /src/util/stream_send_fd.c
parentInitial commit. (diff)
downloadpostfix-upstream/3.5.24.tar.xz
postfix-upstream/3.5.24.zip
Adding upstream version 3.5.24.upstream/3.5.24upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/util/stream_send_fd.c')
-rw-r--r--src/util/stream_send_fd.c115
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