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-rw-r--r--src/util/unix_dgram_connect.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/src/util/unix_dgram_connect.c b/src/util/unix_dgram_connect.c
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+/*++
+/* NAME
+/* unix_dgram_connect 3
+/* SUMMARY
+/* connect to UNIX-domain datagram server
+/* SYNOPSIS
+/* #include <connect.h>
+/*
+/* int unix_dgram_connect(
+/* const char *path,
+/* int block_mode)
+/* DESCRIPTION
+/* unix_dgram_connect() connects to the specified UNIX-domain
+/* datagram server, and returns the resulting file descriptor.
+/*
+/* Arguments:
+/* .IP path
+/* Null-terminated string with connection destination.`
+/* .IP block_mode
+/* Either NON_BLOCKING for a non-blocking socket, or BLOCKING for
+/* blocking mode.
+/* DIAGNOSIICS
+/* Fatal errors: path too large, can't create socket.
+/*
+/* Other errors result in a -1 result value, with errno indicating
+/* why the service is unavailable.
+/* .sp
+/* ENOENT: the named socket does not exist.
+/* .sp
+/* ECONNREFUSED: the named socket is not open.
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* Google, Inc.
+/* 111 8th Avenue
+/* New York, NY 10011, USA
+/*--*/
+
+ /*
+ * System library.
+ */
+#include <sys_defs.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <string.h>
+
+ /*
+ * Utility library.
+ */
+#include <msg.h>
+#include <connect.h>
+#include <iostuff.h>
+
+/* unix_dgram_connect - connect to UNIX-domain datagram service */
+
+int unix_dgram_connect(const char *path, int block_mode)
+{
+ const char myname[] = "unix_dgram_connect";
+#undef sun
+ struct sockaddr_un sun;
+ ssize_t path_len;
+ int sock;
+
+ /*
+ * Translate address information to internal form.
+ */
+ if ((path_len = strlen(path)) >= sizeof(sun.sun_path))
+ msg_fatal("%s: unix-domain name too long: %s", myname, path);
+ memset((void *) &sun, 0, sizeof(sun));
+ sun.sun_family = AF_UNIX;
+#ifdef HAS_SUN_LEN
+ sun.sun_len = path_len + 1;
+#endif
+ memcpy(sun.sun_path, path, path_len + 1);
+
+ /*
+ * Create a client socket.
+ */
+ if ((sock = socket(AF_UNIX, SOCK_DGRAM, 0)) < 0)
+ msg_fatal("%s: socket: %m", myname);
+ if (connect(sock, (struct sockaddr *) &sun, sizeof(sun)) < 0) {
+ close(sock);
+ return (-1);
+ }
+ non_blocking(sock, block_mode);
+ return (sock);
+}