2 This file is part of GNUnet
3 (C) 2002, 2003, 2004, 2005, 2006 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 2, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file util/os_priority.c
23 * @brief Methods to set process priority
28 #include "gnunet_common.h"
29 #include "gnunet_os_lib.h"
33 #include "gnunet_signal_lib.h"
35 extern GNUNET_SIGNAL_Handler w32_sigchld_handler;
38 * @brief Waits for a process to terminate and invokes the SIGCHLD handler
39 * @param h handle to the process
42 ChildWaitThread (HANDLE h)
44 WaitForSingleObject (h, INFINITE);
46 if (w32_sigchld_handler)
47 w32_sigchld_handler ();
55 * Set process priority
57 * @param proc id of the process
58 * @param prio priority value
59 * @return GNUNET_OK on success, GNUNET_SYSERR on error
62 GNUNET_OS_set_process_priority (pid_t proc,
63 enum GNUNET_SCHEDULER_Priority prio)
67 GNUNET_assert (prio < GNUNET_SCHEDULER_PRIORITY_COUNT);
68 if (prio == GNUNET_SCHEDULER_PRIORITY_KEEP)
70 /* convert to MINGW/Unix values */
73 case GNUNET_SCHEDULER_PRIORITY_UI:
74 case GNUNET_SCHEDULER_PRIORITY_URGENT:
76 rprio = HIGH_PRIORITY_CLASS;
82 case GNUNET_SCHEDULER_PRIORITY_HIGH:
84 rprio = ABOVE_NORMAL_PRIORITY_CLASS;
90 case GNUNET_SCHEDULER_PRIORITY_DEFAULT:
92 rprio = NORMAL_PRIORITY_CLASS;
98 case GNUNET_SCHEDULER_PRIORITY_BACKGROUND:
100 rprio = BELOW_NORMAL_PRIORITY_CLASS;
106 case GNUNET_SCHEDULER_PRIORITY_IDLE:
108 rprio = IDLE_PRIORITY_CLASS;
115 return GNUNET_SYSERR;
117 /* Set process priority */
119 SetPriorityClass (GetCurrentProcess (), rprio);
122 (proc == getpid () ) )
125 int delta = rprio - have;
128 (rprio == nice (delta)) &&
131 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING |
132 GNUNET_ERROR_TYPE_BULK, "nice");
133 return GNUNET_SYSERR;
138 if (0 != setpriority (PRIO_PROCESS, proc, rprio))
141 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING |
142 GNUNET_ERROR_TYPE_BULK, "setpriority");
143 return GNUNET_SYSERR;
147 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
148 "Priority management not availabe for this platform\n");
156 * @param pipe_stdin pipe to use to send input to child process (or NULL)
157 * @param pipe_stdout pipe to use to get output from child process (or NULL)
158 * @param filename name of the binary
159 * @param ... NULL-terminated list of arguments to the process
160 * @return process ID of the new process, -1 on error
163 GNUNET_OS_start_process (struct GNUNET_DISK_PipeHandle *pipe_stdin,
164 struct GNUNET_DISK_PipeHandle *pipe_stdout,
165 const char *filename, ...)
167 /* FIXME: Make this work on windows!!! */
180 va_start (ap, filename);
181 while (NULL != va_arg (ap, char *))
184 argv = GNUNET_malloc (sizeof (char *) * (argc + 1));
186 va_start (ap, filename);
187 while (NULL != (argv[argc] = va_arg (ap, char *)))
190 if (pipe_stdout != NULL)
192 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle(pipe_stdout, GNUNET_DISK_PIPE_END_WRITE), &fd_stdout_write, sizeof (int));
193 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle(pipe_stdout, GNUNET_DISK_PIPE_END_READ), &fd_stdout_read, sizeof (int));
195 if (pipe_stdin != NULL)
197 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle(pipe_stdin, GNUNET_DISK_PIPE_END_READ), &fd_stdin_read, sizeof (int));
198 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle(pipe_stdin, GNUNET_DISK_PIPE_END_WRITE), &fd_stdin_write, sizeof (int));
201 #if HAVE_WORKING_VFORK
210 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
215 #if HAVE_WORKING_VFORK
216 /* let's hope vfork actually works; for some extreme cases (including
217 a testcase) we need 'execvp' to have run before we return, since
218 we may send a signal to the process next and we don't want it
219 to be caught by OUR signal handler (but either by the default
220 handler or the actual handler as installed by the process itself). */
222 /* let's give the child process a chance to run execvp, 1s should
223 be plenty in practice */
224 if (pipe_stdout != NULL)
225 GNUNET_DISK_pipe_close_end(pipe_stdout, GNUNET_DISK_PIPE_END_WRITE);
226 if (pipe_stdin != NULL)
227 GNUNET_DISK_pipe_close_end(pipe_stdin, GNUNET_DISK_PIPE_END_READ);
235 if (pipe_stdout != NULL)
237 GNUNET_break (0 == close (fd_stdout_read));
238 if (-1 == dup2(fd_stdout_write, 1))
239 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "dup2");
240 GNUNET_break (0 == close (fd_stdout_write));
243 if (pipe_stdin != NULL)
246 GNUNET_break (0 == close (fd_stdin_write));
247 if (-1 == dup2(fd_stdin_read, 0))
248 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "dup2");
249 GNUNET_break (0 == close (fd_stdin_read));
251 execvp (filename, argv);
252 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "execvp", filename);
259 PROCESS_INFORMATION proc;
262 HANDLE stdout_handle;
265 char path[MAX_PATH + 1];
268 va_start (ap, filename);
269 while (NULL != (arg = va_arg (ap, char *)))
270 cmdlen = cmdlen + strlen (arg) + 3;
273 cmd = idx = GNUNET_malloc (sizeof (char) * cmdlen);
274 va_start (ap, filename);
275 while (NULL != (arg = va_arg (ap, char *)))
276 idx += sprintf (idx, "\"%s\" ", arg);
279 memset (&start, 0, sizeof (start));
280 start.cb = sizeof (start);
283 if ((pipe_stdin != NULL) || (pipe_stdout != NULL))
284 start.dwFlags |= STARTF_USESTDHANDLES;
286 if (pipe_stdin != NULL)
288 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle(pipe_stdin, GNUNET_DISK_PIPE_END_READ), &stdin_handle, sizeof (HANDLE));
289 start.hStdInput = stdin_handle;
292 if (pipe_stdout != NULL)
294 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle(pipe_stdout, GNUNET_DISK_PIPE_END_WRITE), &stdout_handle, sizeof (HANDLE));
295 start.hStdOutput = stdout_handle;
298 if ((int) FindExecutable(filename, NULL, path) <= 32)
300 SetErrnoFromWinError (GetLastError ());
301 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "FindExecutable", fn);
306 (path, cmd, NULL, NULL, FALSE, DETACHED_PROCESS, NULL, NULL, &start,
309 SetErrnoFromWinError (GetLastError ());
310 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "CreateProcess", fn);
314 CreateThread (NULL, 64000, ChildWaitThread, proc.hProcess, 0, NULL);
318 CloseHandle (proc.hThread);
322 return proc.dwProcessId;
332 * @param lsocks array of listen sockets to dup systemd-style (or NULL);
333 * must be NULL on platforms where dup is not supported
334 * @param filename name of the binary
335 * @param argv NULL-terminated list of arguments to the process
336 * @return process ID of the new process, -1 on error
339 GNUNET_OS_start_process_v (const int *lsocks,
340 const char *filename, char *const argv[])
359 while (-1 != (k = lsocks[i++]))
361 flags = fcntl (k, F_GETFD);
362 GNUNET_assert (flags >= 0);
363 flags &= ~FD_CLOEXEC;
364 (void) fcntl (k, F_SETFD, flags);
365 GNUNET_array_append (lscp, ls, k);
367 GNUNET_array_append (lscp, ls, -1);
369 #if HAVE_WORKING_VFORK
378 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
382 #if HAVE_WORKING_VFORK
383 /* let's hope vfork actually works; for some extreme cases (including
384 a testcase) we need 'execvp' to have run before we return, since
385 we may send a signal to the process next and we don't want it
386 to be caught by OUR signal handler (but either by the default
387 handler or the actual handler as installed by the process itself). */
389 /* let's give the child process a chance to run execvp, 1s should
390 be plenty in practice */
394 GNUNET_array_grow (lscp, ls, 0);
399 /* read systemd documentation... */
400 GNUNET_snprintf (lpid, sizeof (lpid), "%u", getpid());
401 setenv ("LISTEN_PID", lpid, 1);
404 while (-1 != lscp[i])
407 while (-1 != lscp[j])
413 GNUNET_assert (-1 != k);
414 GNUNET_assert (0 == close (lscp[j]));
422 /* Bury any existing FD, no matter what; they should all be closed
423 on exec anyway and the important onces have been dup'ed away */
425 GNUNET_assert (-1 != dup2 (lscp[i], tgt));
427 /* set close-on-exec flag */
428 flags = fcntl (tgt, F_GETFD);
429 GNUNET_assert (flags >= 0);
430 flags &= ~FD_CLOEXEC;
431 (void) fcntl (tgt, F_SETFD, flags);
435 GNUNET_snprintf (fds, sizeof (fds), "%u", i);
436 setenv ("LISTEN_FDS", fds, 1);
438 GNUNET_array_grow (lscp, ls, 0);
439 execvp (filename, argv);
440 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "execvp", filename);
443 char **arg, **non_const_argv;
447 PROCESS_INFORMATION proc;
449 char *non_const_filename = NULL;
452 GNUNET_assert (lsocks == NULL);
453 /* Count the number of arguments */
461 /* Allocate a copy argv */
462 non_const_argv = GNUNET_malloc (sizeof (char *) * (argcount + 1));
464 /* Copy all argv strings */
469 non_const_argv[argcount] = GNUNET_strdup (*arg);
473 non_const_argv[argcount] = NULL;
475 /* Fix .exe extension */
476 filenamelen = strlen (filename);
477 if (filenamelen <= 4 || stricmp (&filename[filenamelen - 4], ".exe") != 0)
479 non_const_filename = GNUNET_malloc (sizeof (char) * (filenamelen + 4 + 1));
480 non_const_filename = strcpy (non_const_filename, non_const_argv[0]);
481 strcat (non_const_filename, ".exe");
482 GNUNET_free (non_const_argv[0]);
483 non_const_argv[0] = non_const_filename;
486 non_const_filename = non_const_argv[0];
490 arg = non_const_argv;
493 cmdlen = cmdlen + strlen (*arg) + 3;
497 /* Allocate and create cmd */
498 cmd = idx = GNUNET_malloc (sizeof (char) * cmdlen);
499 arg = non_const_argv;
502 idx += sprintf (idx, "\"%s\" ", *arg);
506 memset (&start, 0, sizeof (start));
507 start.cb = sizeof (start);
510 (non_const_filename, cmd, NULL, NULL, FALSE, DETACHED_PROCESS, NULL, NULL, &start,
513 SetErrnoFromWinError (GetLastError ());
514 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
518 CreateThread (NULL, 64000, ChildWaitThread, proc.hProcess, 0, NULL);
520 CloseHandle (proc.hThread);
524 GNUNET_free (non_const_argv[--argcount]);
525 GNUNET_free (non_const_argv);
527 return proc.dwProcessId;
532 * Retrieve the status of a process
533 * @param proc process ID
534 * @param type status type
535 * @param code return code/signal number
536 * @return GNUNET_OK on success, GNUNET_NO if the process is still running, GNUNET_SYSERR otherwise
539 GNUNET_OS_process_status (pid_t proc, enum GNUNET_OS_ProcessStatusType *type,
546 GNUNET_assert (0 != proc);
547 ret = waitpid (proc, &status, WNOHANG);
550 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "waitpid");
551 return GNUNET_SYSERR;
555 *type = GNUNET_OS_PROCESS_RUNNING;
561 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "waitpid");
562 return GNUNET_SYSERR;
564 if (WIFEXITED (status))
566 *type = GNUNET_OS_PROCESS_EXITED;
567 *code = WEXITSTATUS (status);
569 else if (WIFSIGNALED (status))
571 *type = GNUNET_OS_PROCESS_SIGNALED;
572 *code = WTERMSIG (status);
574 else if (WIFSTOPPED (status))
576 *type = GNUNET_OS_PROCESS_SIGNALED;
577 *code = WSTOPSIG (status);
580 else if (WIFCONTINUED (status))
582 *type = GNUNET_OS_PROCESS_RUNNING;
588 *type = GNUNET_OS_PROCESS_UNKNOWN;
595 h = OpenProcess (PROCESS_QUERY_INFORMATION, FALSE, proc);
596 if (INVALID_HANDLE_VALUE == h)
598 SetErrnoFromWinError (GetLastError ());
599 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "OpenProcess");
600 return GNUNET_SYSERR;
603 c = GetExitCodeProcess (proc, &c);
604 if (STILL_ACTIVE == c)
606 *type = GNUNET_OS_PROCESS_RUNNING;
611 *type = GNUNET_OS_PROCESS_EXITED;
621 * @param proc process ID to wait for
622 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
625 GNUNET_OS_process_wait (pid_t proc)
628 if (proc != waitpid (proc, NULL, 0))
629 return GNUNET_SYSERR;
636 h = OpenProcess (PROCESS_QUERY_INFORMATION, FALSE, proc);
637 if (INVALID_HANDLE_VALUE == h)
639 SetErrnoFromWinError (GetLastError ());
640 return GNUNET_SYSERR;
643 if (WAIT_OBJECT_0 != WaitForSingleObject (h, INFINITE))
645 SetErrnoFromWinError (GetLastError ());
658 /* end of os_priority.c */