1 /* Serial interface for a pipe to a separate program
2 Copyright (C) 1999, 2000, 2001, 2007, 2008, 2009, 2010
3 Free Software Foundation, Inc.
5 Contributed by Cygnus Solutions.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include "gdb_vfork.h"
29 #include <sys/types.h>
30 #include <sys/socket.h>
33 #include "gdb_string.h"
37 static int pipe_open (struct serial
*scb
, const char *name
);
38 static void pipe_close (struct serial
*scb
);
40 extern void _initialize_ser_pipe (void);
47 /* Open up a raw pipe */
50 pipe_open (struct serial
*scb
, const char *name
)
55 struct pipe_state
*state
;
57 /* Copyright (c) 1988, 1993
58 * The Regents of the University of California. All rights reserved.
60 * This code is derived from software written by Ken Arnold and
61 * published in UNIX Review, Vol. 6, No. 8.
66 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, pdes
) < 0)
68 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, err_pdes
) < 0)
75 /* Create the child process to run the command in. Note that the
76 apparent call to vfork() below *might* actually be a call to
77 fork() due to the fact that autoconf will ``#define vfork fork''
78 on certain platforms. */
91 if (fcntl (err_pdes
[0], F_SETFL
, O_NONBLOCK
) == -1)
95 err_pdes
[0] = err_pdes
[1] = -1;
101 /* re-wire pdes[1] to stdin/stdout */
103 if (pdes
[1] != STDOUT_FILENO
)
105 dup2 (pdes
[1], STDOUT_FILENO
);
108 dup2 (STDOUT_FILENO
, STDIN_FILENO
);
110 if (err_pdes
[0] != -1)
113 dup2 (err_pdes
[1], STDERR_FILENO
);
117 /* close any stray FD's - FIXME - how? */
118 /* POSIX.2 B.3.2.2 "popen() shall ensure that any streams
119 from previous popen() calls that remain open in the
120 parent process are closed in the new child process. */
121 for (old
= pidlist
; old
; old
= old
->next
)
122 close (fileno (old
->fp
)); /* don't allow a flush */
124 execl ("/bin/sh", "sh", "-c", name
, (char *) 0);
130 if (err_pdes
[1] != -1)
133 state
= XMALLOC (struct pipe_state
);
136 scb
->error_fd
= err_pdes
[0];
139 /* If we don't do this, GDB simply exits when the remote side dies. */
140 signal (SIGPIPE
, SIG_IGN
);
146 pipe_close (struct serial
*scb
)
148 struct pipe_state
*state
= scb
->state
;
151 int pid
= state
->pid
;
154 if (scb
->error_fd
!= -1)
155 close (scb
->error_fd
);
160 /* Might be useful to check that the child does die,
161 and while we're waiting for it to die print any remaining
167 _initialize_ser_pipe (void)
169 struct serial_ops
*ops
= XMALLOC (struct serial_ops
);
170 memset (ops
, 0, sizeof (struct serial_ops
));
173 ops
->open
= pipe_open
;
174 ops
->close
= pipe_close
;
175 ops
->readchar
= ser_base_readchar
;
176 ops
->write
= ser_base_write
;
177 ops
->flush_output
= ser_base_flush_output
;
178 ops
->flush_input
= ser_base_flush_input
;
179 ops
->send_break
= ser_base_send_break
;
180 ops
->go_raw
= ser_base_raw
;
181 ops
->get_tty_state
= ser_base_get_tty_state
;
182 ops
->set_tty_state
= ser_base_set_tty_state
;
183 ops
->print_tty_state
= ser_base_print_tty_state
;
184 ops
->noflush_set_tty_state
= ser_base_noflush_set_tty_state
;
185 ops
->setbaudrate
= ser_base_setbaudrate
;
186 ops
->setstopbits
= ser_base_setstopbits
;
187 ops
->drain_output
= ser_base_drain_output
;
188 ops
->async
= ser_base_async
;
189 ops
->read_prim
= ser_unix_read_prim
;
190 ops
->write_prim
= ser_unix_write_prim
;
191 serial_add_interface (ops
);