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/*++
/* 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);
}
}
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