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/*++
/* NAME
/* stream_connect 3
/* SUMMARY
/* connect to stream listener
/* SYNOPSIS
/* #include <connect.h>
/*
/* int stream_connect(path, block_mode, timeout)
/* const char *path;
/* int block_mode;
/* int timeout;
/* DESCRIPTION
/* stream_connect() connects to a stream listener for the specified
/* pathname, and returns the resulting file descriptor.
/*
/* Arguments:
/* .IP path
/* Null-terminated string with listener endpoint name.
/* .IP block_mode
/* Either NON_BLOCKING for a non-blocking stream, or BLOCKING for
/* blocking mode. However, a stream connection succeeds or fails
/* immediately.
/* .IP timeout
/* This argument is ignored; it is present for compatibility with
/* other interfaces. Stream connections succeed or fail immediately.
/* 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 library. */
#include <sys_defs.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 <connect.h>
/* stream_connect - connect to stream listener */
int stream_connect(const char *path, int block_mode, int unused_timeout)
{
#ifdef STREAM_CONNECTIONS
const char *myname = "stream_connect";
int pair[2];
int fifo;
/*
* The requested file system object must exist, otherwise we can't reach
* the server.
*/
if ((fifo = open(path, O_WRONLY | O_NONBLOCK, 0)) < 0)
return (-1);
/*
* This is for {unix,inet}_connect() compatibility.
*/
if (block_mode == BLOCKING)
non_blocking(fifo, BLOCKING);
/*
* Create a pipe, and send one pipe end to the server.
*/
if (pipe(pair) < 0)
msg_fatal("%s: pipe: %m", myname);
if (ioctl(fifo, I_SENDFD, pair[1]) < 0)
msg_fatal("%s: send file descriptor: %m", myname);
close(pair[1]);
/*
* This is for {unix,inet}_connect() compatibility.
*/
if (block_mode == NON_BLOCKING)
non_blocking(pair[0], NON_BLOCKING);
/*
* Cleanup.
*/
close(fifo);
/*
* Keep the other end of the pipe.
*/
return (pair[0]);
#else
msg_fatal("stream connections are not implemented");
#endif
}
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