1 /* GNU Make remote job exportation interface to the Customs daemon.
2 THIS CODE IS NOT SUPPORTED BY THE GNU PROJECT.
3 Please do not send bug reports or questions about it to
6 Copyright (C) 1988-2013 Free Software Foundation, Inc.
7 This file is part of GNU Make.
9 GNU Make is free software; you can redistribute it and/or modify it under the
10 terms of the GNU General Public License as published by the Free Software
11 Foundation; either version 3 of the License, or (at your option) any later
14 GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
16 A PARTICULAR PURPOSE. See the GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License along with
19 this program. If not, see <http://www.gnu.org/licenses/>. */
32 char *remote_description = "Customs";
34 /* File name of the Customs 'export' client command.
35 A full path name can be used to avoid some path-searching overhead. */
36 #define EXPORT_COMMAND "/usr/local/bin/export"
38 /* ExportPermit gotten by start_remote_job_p, and used by start_remote_job. */
39 static ExportPermit permit;
41 /* Normalized path name of the current directory. */
42 static char *normalized_cwd;
44 /* Call once at startup even if no commands are run. */
51 /* Called before exit. */
58 /* Return nonzero if the next job should be done remotely. */
61 start_remote_job_p (int first_p)
63 static int inited = 0;
69 /* Allow the user to turn off job exportation (useful while he is
70 debugging Customs, for example). */
71 if (getenv ("GNU_MAKE_NO_CUSTOMS") != 0)
77 /* For secure Customs, make is installed setuid root and
78 Customs requires a privileged source port be used. */
84 /* Ping the daemon once to see if it is there. */
85 inited = Customs_Ping () == RPC_SUCCESS ? 1 : -1;
87 /* Return to normal user access. */
90 if (starting_directory == 0)
91 /* main couldn't figure it out. */
95 /* Normalize the current directory path name to something
96 that should work on all machines exported to. */
98 normalized_cwd = xmalloc (GET_PATH_MAX);
99 strcpy (normalized_cwd, starting_directory);
100 if (Customs_NormPath (normalized_cwd, GET_PATH_MAX) < 0)
101 /* Path normalization failure means using Customs
102 won't work, but it's not really an error. */
110 njobs = job_slots_used;
112 njobs -= 1; /* correction for being called from reap_children() */
114 /* the first job should run locally, or, if the -l flag is given, we use
115 that as clue as to how many local jobs should be scheduled locally */
116 if (max_load_average < 0 && njobs == 0 || njobs < max_load_average)
119 status = Customs_Host (EXPORT_SAME, &permit);
120 if (status != RPC_SUCCESS)
122 DB (DB_JOBS, (_("Customs won't export: %s\n"),
123 Rpc_ErrorMessage (status)));
127 return !CUSTOMS_FAIL (&permit.addr);
130 /* Start a remote job running the command in ARGV, with environment from
131 ENVP. It gets standard input from STDIN_FD. On failure, return
132 nonzero. On success, return zero, and set *USED_STDIN to nonzero if it
133 will actually use STDIN_FD, zero if not, set *ID_PTR to a unique
134 identification, and set *IS_REMOTE to nonzero if the job is remote, zero
135 if it is local (meaning *ID_PTR is a process ID). */
138 start_remote_job (char **argv, char **envp, int stdin_fd,
139 int *is_remote, int *id_ptr, int *used_stdin)
141 char waybill[MAX_DATA_SIZE], msg[128];
142 struct hostent *host;
143 struct timeval timeout;
144 struct sockaddr_in sin;
146 int retsock, retport, sock;
150 /* Create the return socket. */
151 retsock = Rpc_UdpCreate (True, 0);
154 error (NILF, "exporting: Couldn't create return socket.");
158 /* Get the return socket's port number. */
160 if (getsockname (retsock, (struct sockaddr *) &sin, &len) < 0)
162 (void) close (retsock);
163 perror_with_name ("exporting: ", "getsockname");
166 retport = sin.sin_port;
168 /* Create the TCP socket for talking to the remote child. */
169 sock = Rpc_TcpCreate (False, 0);
171 /* Create a WayBill to give to the server. */
172 len = Customs_MakeWayBill (&permit, normalized_cwd, argv[0], argv,
173 envp, retport, waybill);
175 /* Modify the waybill as if the remote child had done 'child_access ()'. */
177 WayBill *wb = (WayBill *) waybill;
182 /* Send the request to the server, timing out in 20 seconds. */
185 sin.sin_family = AF_INET;
186 sin.sin_port = htons (Customs_Port ());
187 sin.sin_addr = permit.addr;
188 status = Rpc_Call (sock, &sin, (Rpc_Proc) CUSTOMS_IMPORT,
189 len, (Rpc_Opaque) waybill,
190 sizeof (msg), (Rpc_Opaque) msg,
193 host = gethostbyaddr ((char *)&permit.addr, sizeof(permit.addr), AF_INET);
195 if (status != RPC_SUCCESS)
197 (void) close (retsock);
199 error (NILF, "exporting to %s: %s",
200 host ? host->h_name : inet_ntoa (permit.addr),
201 Rpc_ErrorMessage (status));
204 else if (msg[0] != 'O' || msg[1] != 'k' || msg[2] != '\0')
206 (void) close (retsock);
208 error (NILF, "exporting to %s: %s",
209 host ? host->h_name : inet_ntoa (permit.addr),
215 error (NILF, "*** exported to %s (id %u)",
216 host ? host->h_name : inet_ntoa (permit.addr),
226 /* The fork failed! */
227 perror_with_name ("fork", "");
232 /* Child side. Run 'export' to handle the connection. */
233 static char sock_buf[20], retsock_buf[20], id_buf[20];
234 static char *new_argv[6] =
235 { EXPORT_COMMAND, "-id", sock_buf, retsock_buf, id_buf, 0 };
237 /* Set up the arguments. */
238 (void) sprintf (sock_buf, "%d", sock);
239 (void) sprintf (retsock_buf, "%d", retsock);
240 (void) sprintf (id_buf, "%x", permit.id);
242 /* Get the right stdin. */
244 (void) dup2 (stdin_fd, 0);
246 /* Unblock signals in the child. */
249 /* Run the command. */
250 exec_command (new_argv, envp);
253 /* Parent side. Return the 'export' process's ID. */
254 (void) close (retsock);
262 /* Get the status of a dead remote child. Block waiting for one to die
263 if BLOCK is nonzero. Set *EXIT_CODE_PTR to the exit status, *SIGNAL_PTR
264 to the termination signal or zero if it exited normally, and *COREDUMP_PTR
265 nonzero if it dumped core. Return the ID of the child that died,
266 0 if we would have to block and !BLOCK, or < 0 if there were none. */
269 remote_status (int *exit_code_ptr, int *signal_ptr, int *coredump_ptr,
275 /* Block asynchronous notification of remote child death.
276 If this notification is done by raising the child termination
277 signal, do not block that signal. */
279 block_remote_children (void)
284 /* Restore asynchronous notification of remote child death.
285 If this is done by raising the child termination signal,
286 do not unblock that signal. */
288 unblock_remote_children (void)
293 /* Send signal SIG to child ID. Return 0 if successful, -1 if not. */
295 remote_kill (int id, int sig)