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/* Serial interface for local domain connections on Un*x like systems.
Copyright (C) 1992-2024 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "serial.h"
#include "ser-base.h"
#include <sys/socket.h>
#include <sys/un.h>
#ifndef UNIX_PATH_MAX
#define UNIX_PATH_MAX sizeof(((struct sockaddr_un *) NULL)->sun_path)
#endif
/* Open an AF_UNIX socket. */
static void
uds_open (struct serial *scb, const char *name)
{
struct sockaddr_un addr;
if (strlen (name) > UNIX_PATH_MAX - 1)
error (_("The socket name is too long. It may be no longer than %s bytes."),
pulongest (UNIX_PATH_MAX - 1L));
memset (&addr, 0, sizeof addr);
addr.sun_family = AF_UNIX;
strncpy (addr.sun_path, name, UNIX_PATH_MAX - 1);
scb->fd = socket (AF_UNIX, SOCK_STREAM, 0);
if (scb->fd < 0)
perror_with_name (_("could not open socket"));
if (connect (scb->fd, (struct sockaddr *) &addr,
sizeof (struct sockaddr_un)) < 0)
{
int saved = errno;
close (scb->fd);
perror_with_name (_("could not connect to remote"), saved);
}
}
static void
uds_close (struct serial *scb)
{
if (scb->fd == -1)
return;
close (scb->fd);
scb->fd = -1;
}
static int
uds_read_prim (struct serial *scb, size_t count)
{
int result = recv (scb->fd, scb->buf, count, 0);
if (result == -1 && errno != EINTR)
perror_with_name ("error while reading");
return result;
}
static int
uds_write_prim (struct serial *scb, const void *buf, size_t count)
{
int result = send (scb->fd, buf, count, 0);
if (result == -1 && errno != EINTR)
perror_with_name ("error while writing");
return result;
}
/* The local socket ops. */
static const struct serial_ops uds_ops =
{
"local",
uds_open,
uds_close,
NULL,
ser_base_readchar,
ser_base_write,
ser_base_flush_output,
ser_base_flush_input,
ser_base_send_break,
ser_base_raw,
ser_base_get_tty_state,
ser_base_copy_tty_state,
ser_base_set_tty_state,
ser_base_print_tty_state,
ser_base_setbaudrate,
ser_base_setstopbits,
ser_base_setparity,
ser_base_drain_output,
ser_base_async,
uds_read_prim,
uds_write_prim
};
void _initialize_ser_socket ();
void
_initialize_ser_socket ()
{
serial_add_interface (&uds_ops);
}
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