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- /* This file implements an interface to the Customs daemon to do
- remote execution of commands under GNU make.
- THIS CODE IS NOT SUPPORTED BY THE GNU PROJECT.
- Please do not send bug reports or questions about it to
- the Make maintainers.
-
- Copyright (C) 1988, 1989, 1992, 1993 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 2, 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 "job.h"
- #include <sys/time.h>
- #include <netdb.h>
-
- #define __STRICT_BSD__ /* Don't make conflicting declarations. */
- #include "customs.h"
-
-
- char *remote_description = "Customs";
-
- /* File name of the Customs `export' client command.
- A full path name can be used to avoid some path-searching overhead. */
- #define EXPORT_COMMAND "/gnu/bin/export"
-
- /* ExportPermit gotten by start_remote_job_p, and used by start_remote_job. */
- static ExportPermit permit;
-
- /* Normalized path name of the current directory. */
- static char *normalized_cwd;
-
- /* Return nonzero if the next job should be done remotely. */
-
- int
- start_remote_job_p ()
- {
- static int inited = 0;
- int status;
-
- /* Allow the user to turn off job exportation
- (useful while he is debugging Customs, for example). */
- if (getenv ("GNU_MAKE_NO_CUSTOMS") != 0)
- return 0;
-
- if (!inited)
- {
- /* For secure Customs, make is installed setuid root and
- Customs requires a privileged source port be used. */
- make_access ();
-
- /* Ping the daemon once to see if it is there. */
- inited = Customs_Ping () == RPC_SUCCESS ? 1 : -1;
-
- /* Return to normal user access. */
- user_access ();
-
- if (starting_directory == 0)
- /* main couldn't figure it out. */
- inited = -1;
- else
- {
- /* Normalize the current directory path name to something
- that should work on all machines exported to. */
-
- normalized_cwd = (char *) xmalloc (GET_PATH_MAX);
- strcpy (normalized_cwd, starting_directory);
- if (Customs_NormPath (normalized_cwd, GET_PATH_MAX) < 0)
- /* Path normalization failure means using Customs
- won't work, but it's not really an error. */
- inited = -1;
- }
- }
-
- if (inited < 0)
- return 0;
-
- status = Customs_Host (EXPORT_SAME, &permit);
- if (status != RPC_SUCCESS)
- {
- if (debug_flag)
- printf ("Customs won't export: %s\n", Rpc_ErrorMessage (status));
- return 0;
- }
-
- return !CUSTOMS_FAIL (&permit.addr);
- }
-
- /* Start a remote job running the command in ARGV, with environment from
- ENVP. 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 nonzero if the job is remote, zero
- if it is local (meaning *ID_PTR is a process ID). */
-
- int
- start_remote_job (argv, envp, stdin_fd, is_remote, id_ptr, used_stdin)
- char **argv, **envp;
- int stdin_fd;
- int *is_remote;
- int *id_ptr;
- int *used_stdin;
- {
- extern int vfork (), execve ();
- 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;
-
- /* 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, normalized_cwd, argv[0], argv,
- envp, retport, waybill);
-
- /* Modify the waybill as if the remote child had done `child_access ()'. */
- {
- WayBill *wb = (WayBill *) waybill;
- wb->euid = wb->ruid;
- wb->rgid = wb->rgid;
- }
-
- /* 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;
- }
- else if (debug_flag)
- {
- struct hostent *host = gethostbyaddr (&permit.addr, sizeof (permit.addr),
- AF_INET);
- printf ("Job exported to %s ID %u\n",
- host == 0 ? inet_ntoa (permit.addr) : host->h_name,
- permit.id);
- }
-
- 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_COMMAND, "-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);
-
- /* Get the right stdin. */
- if (stdin_fd != 0)
- (void) dup2 (stdin_fd, 0);
-
- /* Unblock signals in the child. */
- unblock_sigs ();
-
- /* Run the command. */
- exec_command (new_argv, envp);
- }
-
- /* 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;
- }
-