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"
38 static int pipe_open (struct serial
*scb
, const char *name
);
39 static void pipe_close (struct serial
*scb
);
41 extern void _initialize_ser_pipe (void);
48 /* Open up a raw pipe */
51 pipe_open (struct serial
*scb
, const char *name
)
56 struct pipe_state
*state
;
58 /* Copyright (c) 1988, 1993
59 * The Regents of the University of California. All rights reserved.
61 * This code is derived from software written by Ken Arnold and
62 * published in UNIX Review, Vol. 6, No. 8.
68 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, pdes
) < 0)
70 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, err_pdes
) < 0)
77 /* Create the child process to run the command in. Note that the
78 apparent call to vfork() below *might* actually be a call to
79 fork() due to the fact that autoconf will ``#define vfork fork''
80 on certain platforms. */
93 if (fcntl (err_pdes
[0], F_SETFL
, O_NONBLOCK
) == -1)
97 err_pdes
[0] = err_pdes
[1] = -1;
103 /* We don't want ^c to kill the connection. */
105 pid_t sid
= setsid ();
107 signal (SIGINT
, SIG_IGN
);
109 signal (SIGINT
, SIG_IGN
);
112 /* re-wire pdes[1] to stdin/stdout */
114 if (pdes
[1] != STDOUT_FILENO
)
116 dup2 (pdes
[1], STDOUT_FILENO
);
119 dup2 (STDOUT_FILENO
, STDIN_FILENO
);
121 if (err_pdes
[0] != -1)
124 dup2 (err_pdes
[1], STDERR_FILENO
);
128 /* close any stray FD's - FIXME - how? */
129 /* POSIX.2 B.3.2.2 "popen() shall ensure that any streams
130 from previous popen() calls that remain open in the
131 parent process are closed in the new child process. */
132 for (old
= pidlist
; old
; old
= old
->next
)
133 close (fileno (old
->fp
)); /* don't allow a flush */
135 execl ("/bin/sh", "sh", "-c", name
, (char *) 0);
141 if (err_pdes
[1] != -1)
144 state
= XMALLOC (struct pipe_state
);
147 scb
->error_fd
= err_pdes
[0];
150 /* If we don't do this, GDB simply exits when the remote side dies. */
151 signal (SIGPIPE
, SIG_IGN
);
157 pipe_close (struct serial
*scb
)
159 struct pipe_state
*state
= scb
->state
;
167 kill (state
->pid
, SIGTERM
);
169 /* Assume the program will exit after SIGTERM. Might be
170 useful to print any remaining stderr output from
171 scb->error_fd while waiting. */
172 waitpid (state
->pid
, &status
, 0);
174 if (scb
->error_fd
!= -1)
175 close (scb
->error_fd
);
183 gdb_pipe (int pdes
[2])
190 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, pdes
) < 0)
193 /* If we don't do this, GDB simply exits when the remote side
195 signal (SIGPIPE
, SIG_IGN
);
201 _initialize_ser_pipe (void)
203 struct serial_ops
*ops
= XMALLOC (struct serial_ops
);
205 memset (ops
, 0, sizeof (struct serial_ops
));
208 ops
->open
= pipe_open
;
209 ops
->close
= pipe_close
;
210 ops
->readchar
= ser_base_readchar
;
211 ops
->write
= ser_base_write
;
212 ops
->flush_output
= ser_base_flush_output
;
213 ops
->flush_input
= ser_base_flush_input
;
214 ops
->send_break
= ser_base_send_break
;
215 ops
->go_raw
= ser_base_raw
;
216 ops
->get_tty_state
= ser_base_get_tty_state
;
217 ops
->set_tty_state
= ser_base_set_tty_state
;
218 ops
->print_tty_state
= ser_base_print_tty_state
;
219 ops
->noflush_set_tty_state
= ser_base_noflush_set_tty_state
;
220 ops
->setbaudrate
= ser_base_setbaudrate
;
221 ops
->setstopbits
= ser_base_setstopbits
;
222 ops
->drain_output
= ser_base_drain_output
;
223 ops
->async
= ser_base_async
;
224 ops
->read_prim
= ser_unix_read_prim
;
225 ops
->write_prim
= ser_unix_write_prim
;
226 serial_add_interface (ops
);