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);
260 PROCESS_INFORMATION proc;
263 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 + 1));
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);
282 if ((pipe_stdin != NULL) || (pipe_stdout != NULL))
283 start.dwFlags |= STARTF_USESTDHANDLES;
285 if (pipe_stdin != NULL)
287 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle(pipe_stdin, GNUNET_DISK_PIPE_END_READ), &stdin_handle, sizeof (HANDLE));
288 start.hStdInput = stdin_handle;
291 if (pipe_stdout != NULL)
293 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle(pipe_stdout, GNUNET_DISK_PIPE_END_WRITE), &stdout_handle, sizeof (HANDLE));
294 start.hStdOutput = stdout_handle;
297 findresult = (int) FindExecutableA (filename, NULL, path);
298 if (findresult <= 32)
300 SetErrnoFromWinError (GetLastError ());
301 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "FindExecutable", filename);
306 (path, cmd, NULL, NULL, TRUE, DETACHED_PROCESS, NULL, NULL, &start,
309 SetErrnoFromWinError (GetLastError ());
310 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "CreateProcess", path);
314 CreateThread (NULL, 64000, ChildWaitThread, proc.hProcess, 0, NULL);
316 CloseHandle (proc.hThread);
320 return proc.dwProcessId;
330 * @param lsocks array of listen sockets to dup systemd-style (or NULL);
331 * must be NULL on platforms where dup is not supported
332 * @param filename name of the binary
333 * @param argv NULL-terminated list of arguments to the process
334 * @return process ID of the new process, -1 on error
337 GNUNET_OS_start_process_v (const int *lsocks,
338 const char *filename, char *const argv[])
357 while (-1 != (k = lsocks[i++]))
358 GNUNET_array_append (lscp, ls, k);
359 GNUNET_array_append (lscp, ls, -1);
361 #if HAVE_WORKING_VFORK
370 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
374 #if HAVE_WORKING_VFORK
375 /* let's hope vfork actually works; for some extreme cases (including
376 a testcase) we need 'execvp' to have run before we return, since
377 we may send a signal to the process next and we don't want it
378 to be caught by OUR signal handler (but either by the default
379 handler or the actual handler as installed by the process itself). */
381 /* let's give the child process a chance to run execvp, 1s should
382 be plenty in practice */
386 GNUNET_array_grow (lscp, ls, 0);
391 /* read systemd documentation... */
392 GNUNET_snprintf (lpid, sizeof (lpid), "%u", getpid());
393 setenv ("LISTEN_PID", lpid, 1);
396 while (-1 != lscp[i])
399 while (-1 != lscp[j])
405 GNUNET_assert (-1 != k);
406 GNUNET_assert (0 == close (lscp[j]));
414 /* Bury any existing FD, no matter what; they should all be closed
415 on exec anyway and the important onces have been dup'ed away */
417 GNUNET_assert (-1 != dup2 (lscp[i], tgt));
419 /* unset close-on-exec flag */
420 flags = fcntl (tgt, F_GETFD);
421 GNUNET_assert (flags >= 0);
422 flags &= ~FD_CLOEXEC;
424 (void) fcntl (tgt, F_SETFD, flags);
428 GNUNET_snprintf (fds, sizeof (fds), "%u", i);
429 setenv ("LISTEN_FDS", fds, 1);
431 GNUNET_array_grow (lscp, ls, 0);
432 execvp (filename, argv);
433 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "execvp", filename);
436 char **arg, **non_const_argv;
440 PROCESS_INFORMATION proc;
442 char *non_const_filename = NULL;
445 GNUNET_assert (lsocks == NULL);
446 /* Count the number of arguments */
447 arg = (char **) argv;
454 /* Allocate a copy argv */
455 non_const_argv = GNUNET_malloc (sizeof (char *) * (argcount + 1));
457 /* Copy all argv strings */
459 arg = (char **) argv;
462 non_const_argv[argcount] = GNUNET_strdup (*arg);
466 non_const_argv[argcount] = NULL;
468 /* Fix .exe extension */
469 filenamelen = strlen (filename);
470 if (filenamelen <= 4 || stricmp (&filename[filenamelen - 4], ".exe") != 0)
472 non_const_filename = GNUNET_malloc (sizeof (char) * (filenamelen + 4 + 1));
473 non_const_filename = strcpy (non_const_filename, non_const_argv[0]);
474 strcat (non_const_filename, ".exe");
475 GNUNET_free (non_const_argv[0]);
476 non_const_argv[0] = non_const_filename;
479 non_const_filename = non_const_argv[0];
483 arg = non_const_argv;
486 cmdlen = cmdlen + strlen (*arg) + 3;
490 /* Allocate and create cmd */
491 cmd = idx = GNUNET_malloc (sizeof (char) * cmdlen);
492 arg = non_const_argv;
495 idx += sprintf (idx, "\"%s\" ", *arg);
499 memset (&start, 0, sizeof (start));
500 start.cb = sizeof (start);
503 (non_const_filename, cmd, NULL, NULL, FALSE, DETACHED_PROCESS, NULL, NULL, &start,
506 SetErrnoFromWinError (GetLastError ());
507 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
511 CreateThread (NULL, 64000, ChildWaitThread, proc.hProcess, 0, NULL);
513 CloseHandle (proc.hThread);
517 GNUNET_free (non_const_argv[--argcount]);
518 GNUNET_free (non_const_argv);
520 return proc.dwProcessId;
525 * Retrieve the status of a process
526 * @param proc process ID
527 * @param type status type
528 * @param code return code/signal number
529 * @return GNUNET_OK on success, GNUNET_NO if the process is still running, GNUNET_SYSERR otherwise
532 GNUNET_OS_process_status (pid_t proc, enum GNUNET_OS_ProcessStatusType *type,
539 GNUNET_assert (0 != proc);
540 ret = waitpid (proc, &status, WNOHANG);
543 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "waitpid");
544 return GNUNET_SYSERR;
548 *type = GNUNET_OS_PROCESS_RUNNING;
554 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "waitpid");
555 return GNUNET_SYSERR;
557 if (WIFEXITED (status))
559 *type = GNUNET_OS_PROCESS_EXITED;
560 *code = WEXITSTATUS (status);
562 else if (WIFSIGNALED (status))
564 *type = GNUNET_OS_PROCESS_SIGNALED;
565 *code = WTERMSIG (status);
567 else if (WIFSTOPPED (status))
569 *type = GNUNET_OS_PROCESS_SIGNALED;
570 *code = WSTOPSIG (status);
573 else if (WIFCONTINUED (status))
575 *type = GNUNET_OS_PROCESS_RUNNING;
581 *type = GNUNET_OS_PROCESS_UNKNOWN;
588 h = OpenProcess (PROCESS_QUERY_INFORMATION, FALSE, proc);
589 if (INVALID_HANDLE_VALUE == h)
591 SetErrnoFromWinError (GetLastError ());
592 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "OpenProcess");
593 return GNUNET_SYSERR;
596 c = GetExitCodeProcess (h, &c);
597 if (STILL_ACTIVE == c)
599 *type = GNUNET_OS_PROCESS_RUNNING;
604 *type = GNUNET_OS_PROCESS_EXITED;
614 * @param proc process ID to wait for
615 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
618 GNUNET_OS_process_wait (pid_t proc)
621 if (proc != waitpid (proc, NULL, 0))
622 return GNUNET_SYSERR;
629 h = OpenProcess (PROCESS_QUERY_INFORMATION, FALSE, proc);
630 if (INVALID_HANDLE_VALUE == h)
632 SetErrnoFromWinError (GetLastError ());
633 return GNUNET_SYSERR;
636 if (WAIT_OBJECT_0 != WaitForSingleObject (h, INFINITE))
638 SetErrnoFromWinError (GetLastError ());
651 /* end of os_priority.c */