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REMOTE-C.C
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1993-07-30
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/* Copyright (C) 1988, 1989 Free Software Foundation, Inc.
This file is part of GNU Make.
GNU Make 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 1, or (at your option)
any later version.
GNU Make 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 GNU Make; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "make.h"
#include "commands.h"
#include "customs.h"
#include <sys/time.h>
char *remote_description = "Customs";
/* ExportPermit gotten by start_remote_job_p, and used by start_remote_job. */
static ExportPermit permit;
/* Return nonzero if the next job should be done remotely. */
int
start_remote_job_p ()
{
if (Customs_Host (EXPORT_SAME, &permit) != RPC_SUCCESS)
return 0;
return !CUSTOMS_FAIL (&permit.addr);
}
/* Start a remote job running the command in ARGV.
It gets standard input from STDIN_FD. On failure,
return nonzero. On success, return zero, and set
*USED_STDIN to nonzero if it will actually use STDIN_FD,
zero if not, set *ID_PTR to a unique identification, and
set *IS_REMOTE to zero if the job is local, nonzero if it
is remote (meaning *ID_PTR is a process ID). */
int
start_remote_job (argv, stdin_fd, is_remote, id_ptr, used_stdin)
char **argv;
int stdin_fd;
int *is_remote;
int *id_ptr;
int *used_stdin;
{
extern char **environ;
extern int vfork (), execve ();
char cwd[MAXPATHLEN];
char waybill[MAX_DATA_SIZE], msg[128];
struct timeval timeout;
struct sockaddr_in sin;
int len;
int retsock, retport, sock;
Rpc_Stat status;
int pid;
/* Find the current directory. */
if (getwd (cwd) == 0)
{
error ("exporting: getwd: %s", cwd);
return 1;
}
/* Create the return socket. */
retsock = Rpc_UdpCreate (True, 0);
if (retsock < 0)
{
error ("exporting: Couldn't create return socket.");
return 1;
}
/* Get the return socket's port number. */
len = sizeof(sin);
if (getsockname (retsock, (struct sockaddr *) &sin, &len) < 0)
{
(void) close (retsock);
perror_with_name ("exporting: ", "getsockname");
return 1;
}
retport = sin.sin_port;
/* Create the TCP socket for talking to the remote child. */
sock = Rpc_TcpCreate (False, 0);
/* Create a WayBill to give to the server. */
len = Customs_MakeWayBill (&permit, cwd, argv[0], argv,
environ, retport, waybill);
/* Send the request to the server, timing out in 20 seconds. */
timeout.tv_usec = 0;
timeout.tv_sec = 20;
sin.sin_family = AF_INET;
sin.sin_port = htons (Customs_Port ());
sin.sin_addr = permit.addr;
status = Rpc_Call (sock, &sin, (Rpc_Proc) CUSTOMS_IMPORT,
len, (Rpc_Opaque) waybill,
sizeof(msg), (Rpc_Opaque) msg,
1, &timeout);
if (status != RPC_SUCCESS)
{
(void) close (retsock);
(void) close (sock);
error ("exporting: %s", Rpc_ErrorMessage (status));
return 1;
}
else if (msg[0] != 'O' || msg[1] != 'k' || msg[2] != '\0')
{
(void) close (retsock);
(void) close (sock);
error ("CUSTOMS_IMPORT: %s", msg);
return 1;
}
fflush (stdout);
fflush (stderr);
pid = vfork ();
if (pid < 0)
{
/* The fork failed! */
perror_with_name ("vfork", "");
return 1;
}
else if (pid == 0)
{
/* Child side. Run `export' to handle the connection. */
static char sock_buf[20], retsock_buf[20], id_buf[20];
static char *new_argv[6] =
{ "export", "-id", sock_buf, retsock_buf, id_buf, 0 };
/* Set up the arguments. */
(void) sprintf (sock_buf, "%d", sock);
(void) sprintf (retsock_buf, "%d", retsock);
(void) sprintf (id_buf, "%x", permit.id);
/* Run the command. */
(void) execvp (new_argv[0], new_argv);
perror_with_name ("execvp: ", new_argv[0]);
_exit (127);
}
/* Parent side. Return the `export' process's ID. */
(void) close (retsock);
(void) close (sock);
*is_remote = 0;
*id_ptr = pid;
return 0;
}
/* Get the status of a dead remote child. Block waiting for one to die
if BLOCK is nonzero. Set *EXIT_CODE_PTR to the exit status, *SIGNAL_PTR
to the termination signal or zero if it exited normally, and *COREDUMP_PTR
nonzero if it dumped core. Return the ID of the child that died,
0 if we would have to block and !BLOCK, or < 0 if there were none. */
int
remote_status (exit_code_ptr, signal_ptr, coredump_ptr, block)
int *exit_code_ptr, *signal_ptr, *coredump_ptr;
int block;
{
return -1;
}
/* Block asynchronous notification of remote child death.
If this notification is done by raising the child termination
signal, do not block that signal. */
void
block_remote_children ()
{
return;
}
/* Restore asynchronous notification of remote child death.
If this is done by raising the child termination signal,
do not unblock that signal. */
void
unblock_remote_children ()
{
return;
}
/* Send signal SIG to child ID. Return 0 if successful, -1 if not. */
int
remote_kill (id, sig)
int id;
int sig;
{
return -1;
}