2 This file is part of GNUnet
3 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2011 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 3, 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_util_lib.h"
32 #define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
34 #define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util", syscall)
36 #define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util", syscall, filename)
38 #define GNUNET_OS_CONTROL_PIPE "GNUNET_OS_CONTROL_PIPE"
41 struct GNUNET_OS_Process
56 * Pipe we use to signal the process.
57 * NULL if unused, or if process was deemed uncontrollable.
59 struct GNUNET_DISK_FileHandle *control_pipe;
64 * Handle for 'this' process.
66 static struct GNUNET_OS_Process current_process;
70 * This handler is called when there are control data to be read on the pipe
72 * @param cls the 'struct GNUNET_DISK_FileHandle' of the control pipe
73 * @param tc scheduler context
76 parent_control_handler (void *cls,
77 const struct GNUNET_SCHEDULER_TaskContext *tc)
79 struct GNUNET_DISK_FileHandle *control_pipe = cls;
84 LOG (GNUNET_ERROR_TYPE_DEBUG, "`%s' invoked because of %d\n", __FUNCTION__,
86 if (0 != (tc->reason &
87 (GNUNET_SCHEDULER_REASON_SHUTDOWN | GNUNET_SCHEDULER_REASON_TIMEOUT)))
89 GNUNET_DISK_file_close (control_pipe);
93 ret = GNUNET_DISK_file_read (control_pipe, &sig, sizeof (sig));
94 if (sizeof (sig) != ret)
97 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "GNUNET_DISK_file_read");
98 LOG (GNUNET_ERROR_TYPE_DEBUG, "Closing control pipe\n");
99 GNUNET_DISK_file_close (control_pipe);
103 pipe_fd = getenv (GNUNET_OS_CONTROL_PIPE);
104 GNUNET_assert ( (NULL == pipe_fd) || (strlen (pipe_fd) <= 0) );
105 LOG (GNUNET_ERROR_TYPE_DEBUG,
106 "Got control code %d from parent via pipe %s\n", sig, pipe_fd);
107 GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
108 control_pipe, &parent_control_handler,
110 GNUNET_SIGNAL_raise ((int) sig);
115 * Task that connects this process to its parent via pipe;
116 * essentially, the parent control handler will read signal numbers
117 * from the 'GNUNET_OS_CONTROL_PIPE' (as given in an environment
118 * variable) and raise those signals.
120 * @param cls closure (unused)
121 * @param tc scheduler context (unused)
124 GNUNET_OS_install_parent_control_handler (void *cls,
126 GNUNET_SCHEDULER_TaskContext *tc)
130 struct GNUNET_DISK_FileHandle *control_pipe;
133 env_buf = getenv (GNUNET_OS_CONTROL_PIPE);
134 if ( (NULL == env_buf) || (strlen (env_buf) <= 0) )
136 LOG (GNUNET_ERROR_TYPE_DEBUG,
137 "Not installing a handler because $%s is empty\n",
138 GNUNET_OS_CONTROL_PIPE);
139 putenv (GNUNET_OS_CONTROL_PIPE "=");
143 pipe_fd = strtoull (env_buf, &env_buf_end, 16);
144 if ((0 != errno) || (env_buf == env_buf_end))
146 LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "strtoull", env_buf);
147 putenv (GNUNET_OS_CONTROL_PIPE "=");
150 #if !defined (WINDOWS)
151 if (pipe_fd >= FD_SETSIZE)
153 if ((FILE_TYPE_UNKNOWN == GetFileType ((HANDLE) (uintptr_t) pipe_fd))
154 && (0 != GetLastError ()))
157 LOG (GNUNET_ERROR_TYPE_ERROR,
158 "GNUNET_OS_CONTROL_PIPE `%s' contains garbage?\n", env_buf);
159 putenv (GNUNET_OS_CONTROL_PIPE "=");
163 control_pipe = GNUNET_DISK_get_handle_from_w32_handle ((HANDLE) (uintptr_t) pipe_fd);
165 control_pipe = GNUNET_DISK_get_handle_from_int_fd ((int) pipe_fd);
167 if (NULL == control_pipe)
169 LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "open", env_buf);
170 putenv (GNUNET_OS_CONTROL_PIPE "=");
173 LOG (GNUNET_ERROR_TYPE_DEBUG,
174 "Adding parent control handler pipe `%s' to the scheduler\n", env_buf);
175 GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL, control_pipe,
176 &parent_control_handler, control_pipe);
177 putenv (GNUNET_OS_CONTROL_PIPE "=");
182 * Get process structure for current process
184 * The pointer it returns points to static memory location and must not be
187 * @return pointer to the process sturcutre for this process
189 struct GNUNET_OS_Process *
190 GNUNET_OS_process_current ()
193 current_process.pid = GetCurrentProcessId ();
194 current_process.handle = GetCurrentProcess ();
196 current_process.pid = 0;
198 return ¤t_process;
203 * Sends a signal to the process
205 * @param proc pointer to process structure
207 * @return 0 on success, -1 on error
210 GNUNET_OS_process_kill (struct GNUNET_OS_Process *proc, int sig)
216 if (NULL != proc->control_pipe)
218 LOG (GNUNET_ERROR_TYPE_DEBUG, "Sending signal %d to pid: %u via pipe\n", sig, proc->pid);
219 ret = GNUNET_DISK_file_write (proc->control_pipe, &csig, sizeof (csig));
220 if (sizeof (csig) == ret)
223 /* pipe failed or non-existent, try other methods */
226 #if !defined (WINDOWS)
232 #if (SIGTERM != GNUNET_TERM_SIG)
233 case GNUNET_TERM_SIG:
235 #if defined(WINDOWS) && !defined(__CYGWIN__)
238 int must_kill = GNUNET_YES;
239 if (0 != GetExitCodeProcess (proc->handle, &exitcode))
240 must_kill = (exitcode == STILL_ACTIVE) ? GNUNET_YES : GNUNET_NO;
241 if (GNUNET_YES == must_kill)
242 if (0 == SafeTerminateProcess (proc->handle, 0, 0))
244 DWORD error_code = GetLastError ();
245 if ((error_code != WAIT_TIMEOUT) && (error_code != ERROR_PROCESS_ABORTED))
247 LOG ((error_code == ERROR_ACCESS_DENIED) ?
248 GNUNET_ERROR_TYPE_INFO : GNUNET_ERROR_TYPE_WARNING,
249 "SafeTermiateProcess failed with code %lu\n", error_code);
250 /* The problem here is that a process that is already dying
251 * might cause SafeTerminateProcess to fail with
252 * ERROR_ACCESS_DENIED, but the process WILL die eventually.
253 * If we really had a permissions problem, hanging up (which
254 * is what will happen in process_wait() in that case) is
257 if (ERROR_ACCESS_DENIED == error_code)
263 SetErrnoFromWinError (error_code);
271 LOG (GNUNET_ERROR_TYPE_DEBUG, "Sending signal %d to pid: %u via system call\n", sig, proc->pid);
272 return PLIBC_KILL (proc->pid, sig);
275 #if defined (WINDOWS)
279 LOG (GNUNET_ERROR_TYPE_DEBUG, "Sending signal %d to pid: %u via system call\n", sig, proc->pid);
280 return PLIBC_KILL (proc->pid, sig);
286 * Get the pid of the process in question
288 * @param proc the process to get the pid of
290 * @return the current process id
293 GNUNET_OS_process_get_pid (struct GNUNET_OS_Process * proc)
300 * Cleans up process structure contents (OS-dependent) and deallocates it
302 * @param proc pointer to process structure
305 GNUNET_OS_process_destroy (struct GNUNET_OS_Process *proc)
307 if (NULL != proc->control_pipe)
308 GNUNET_DISK_file_close (proc->control_pipe);
309 #if defined (WINDOWS)
310 if (proc->handle != NULL)
311 CloseHandle (proc->handle);
317 #include "gnunet_signal_lib.h"
319 extern GNUNET_SIGNAL_Handler w32_sigchld_handler;
322 * Make seaspider happy.
324 #define DWORD_WINAPI DWORD WINAPI
327 * @brief Waits for a process to terminate and invokes the SIGCHLD handler
328 * @param proc pointer to process structure
331 child_wait_thread (void *arg)
333 struct GNUNET_OS_Process *proc = (struct GNUNET_OS_Process *) arg;
335 WaitForSingleObject (proc->handle, INFINITE);
337 if (w32_sigchld_handler)
338 w32_sigchld_handler ();
347 CreateCustomEnvTable (char **vars)
349 char *win32_env_table;
354 size_t tablesize = 0;
355 size_t items_count = 0;
364 win32_env_table = GetEnvironmentStringsA ();
365 if (NULL == win32_env_table)
367 for (c = 0, var_ptr = vars; *var_ptr; var_ptr += 2, c++) ;
369 index = GNUNET_malloc (sizeof (char *) * n_var);
370 for (c = 0; c < n_var; c++)
372 for (items_count = 0, ptr = win32_env_table; ptr[0] != 0; items_count++)
374 size_t len = strlen (ptr);
377 for (var_ptr = vars; *var_ptr; var_ptr++)
381 var_len = strlen (var);
382 if (strncmp (var, ptr, var_len) == 0)
386 tablesize += var_len + strlen (val) + 1;
391 tablesize += len + 1;
394 for (n_found = 0, c = 0, var_ptr = vars; *var_ptr; var_ptr++, c++)
399 n_found += strlen (var) + strlen (val) + 1;
401 result = GNUNET_malloc (tablesize + n_found + 1);
402 for (result_ptr = result, ptr = win32_env_table; ptr[0] != 0;)
404 size_t len = strlen (ptr);
407 for (c = 0, var_ptr = vars; *var_ptr; var_ptr++, c++)
411 var_len = strlen (var);
412 if (strncmp (var, ptr, var_len) == 0)
420 strcpy (result_ptr, ptr);
421 result_ptr += len + 1;
425 strcpy (result_ptr, var);
426 result_ptr += var_len;
427 strcpy (result_ptr, val);
428 result_ptr += strlen (val) + 1;
432 for (c = 0, var_ptr = vars; *var_ptr; var_ptr++, c++)
436 var_len = strlen (var);
439 strcpy (result_ptr, var);
440 result_ptr += var_len;
441 strcpy (result_ptr, val);
442 result_ptr += strlen (val) + 1;
445 FreeEnvironmentStrings (win32_env_table);
454 * Open '/dev/null' and make the result the given
457 * @param target_fd desired FD to point to /dev/null
458 * @param flags open flags (O_RDONLY, O_WRONLY)
461 open_dev_null (int target_fd,
466 fd = open ("/dev/null", flags);
469 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "open", "/dev/null");
474 if (-1 == dup2 (fd, target_fd))
476 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "dup2");
480 GNUNET_break (0 == close (fd));
488 * @param pipe_control should a pipe be used to send signals to the child?
489 * @param std_inheritance a set of GNUNET_OS_INHERIT_STD_* flags controlling which
490 * std handles of the parent are inherited by the child.
491 * pipe_stdin and pipe_stdout take priority over std_inheritance
492 * (when they are non-NULL).
493 * @param pipe_stdin pipe to use to send input to child process (or NULL)
494 * @param pipe_stdout pipe to use to get output from child process (or NULL)
495 * @param pipe_stderr pipe to use for stderr for child process (or NULL)
496 * @param lsocks array of listen sockets to dup systemd-style (or NULL);
497 * must be NULL on platforms where dup is not supported
498 * @param filename name of the binary
499 * @param argv NULL-terminated list of arguments to the process
500 * @return process ID of the new process, -1 on error
502 static struct GNUNET_OS_Process *
503 start_process (int pipe_control,
504 enum GNUNET_OS_InheritStdioFlags std_inheritance,
505 struct GNUNET_DISK_PipeHandle *pipe_stdin,
506 struct GNUNET_DISK_PipeHandle *pipe_stdout,
507 struct GNUNET_DISK_PipeHandle *pipe_stderr,
508 const SOCKTYPE *lsocks,
509 const char *filename,
515 struct GNUNET_OS_Process *gnunet_proc;
516 struct GNUNET_DISK_FileHandle *childpipe_read;
517 struct GNUNET_DISK_FileHandle *childpipe_write;
518 int childpipe_read_fd;
533 if (GNUNET_SYSERR == GNUNET_OS_check_helper_binary (filename, GNUNET_NO, NULL))
534 return NULL; /* not executable */
535 if (GNUNET_YES == pipe_control)
537 struct GNUNET_DISK_PipeHandle *childpipe;
538 int dup_childpipe_read_fd = -1;
540 childpipe = GNUNET_DISK_pipe (GNUNET_NO, GNUNET_NO, GNUNET_YES, GNUNET_NO);
541 if (NULL == childpipe)
543 childpipe_read = GNUNET_DISK_pipe_detach_end (childpipe, GNUNET_DISK_PIPE_END_READ);
544 childpipe_write = GNUNET_DISK_pipe_detach_end (childpipe, GNUNET_DISK_PIPE_END_WRITE);
545 GNUNET_DISK_pipe_close (childpipe);
546 if ((NULL == childpipe_read) || (NULL == childpipe_write) ||
547 (GNUNET_OK != GNUNET_DISK_internal_file_handle_ (childpipe_read,
548 &childpipe_read_fd, sizeof (int))) ||
549 (-1 == (dup_childpipe_read_fd = dup (childpipe_read_fd))))
551 if (NULL != childpipe_read)
552 GNUNET_DISK_file_close (childpipe_read);
553 if (NULL != childpipe_write)
554 GNUNET_DISK_file_close (childpipe_write);
555 if (0 <= dup_childpipe_read_fd)
556 close (dup_childpipe_read_fd);
559 childpipe_read_fd = dup_childpipe_read_fd;
560 GNUNET_DISK_file_close (childpipe_read);
564 childpipe_write = NULL;
565 childpipe_read_fd = -1;
567 if (NULL != pipe_stdin)
569 GNUNET_assert (GNUNET_OK ==
570 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle
571 (pipe_stdin, GNUNET_DISK_PIPE_END_READ),
572 &fd_stdin_read, sizeof (int)));
573 GNUNET_assert (GNUNET_OK ==
574 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle
575 (pipe_stdin, GNUNET_DISK_PIPE_END_WRITE),
576 &fd_stdin_write, sizeof (int)));
578 if (NULL != pipe_stdout)
580 GNUNET_assert (GNUNET_OK ==
581 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle
583 GNUNET_DISK_PIPE_END_WRITE),
584 &fd_stdout_write, sizeof (int)));
585 GNUNET_assert (GNUNET_OK ==
586 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle
587 (pipe_stdout, GNUNET_DISK_PIPE_END_READ),
588 &fd_stdout_read, sizeof (int)));
590 if (NULL != pipe_stderr)
592 GNUNET_assert (GNUNET_OK ==
593 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle
595 GNUNET_DISK_PIPE_END_READ),
596 &fd_stderr_read, sizeof (int)));
597 GNUNET_assert (GNUNET_OK ==
598 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle
600 GNUNET_DISK_PIPE_END_WRITE),
601 &fd_stderr_write, sizeof (int)));
608 while (-1 != (k = lsocks[i++]))
609 GNUNET_array_append (lscp, ls, k);
610 GNUNET_array_append (lscp, ls, -1);
613 /* see https://gnunet.org/vfork */
621 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "fork");
622 GNUNET_array_grow (lscp, ls, 0);
623 if (NULL != childpipe_write)
624 GNUNET_DISK_file_close (childpipe_write);
625 if (0 <= childpipe_read_fd)
626 close (childpipe_read_fd);
632 unsetenv (GNUNET_OS_CONTROL_PIPE);
633 gnunet_proc = GNUNET_new (struct GNUNET_OS_Process);
634 gnunet_proc->pid = ret;
635 gnunet_proc->control_pipe = childpipe_write;
636 if (GNUNET_YES == pipe_control)
638 close (childpipe_read_fd);
640 GNUNET_array_grow (lscp, ls, 0);
643 if (0 <= childpipe_read_fd)
647 /* due to vfork, we must NOT free memory on DARWIN! */
648 GNUNET_DISK_file_close (childpipe_write);
650 snprintf (fdbuf, 100, "%x", childpipe_read_fd);
651 setenv (GNUNET_OS_CONTROL_PIPE, fdbuf, 1);
654 unsetenv (GNUNET_OS_CONTROL_PIPE);
655 if (NULL != pipe_stdin)
657 GNUNET_break (0 == close (fd_stdin_write));
658 if (-1 == dup2 (fd_stdin_read, 0))
659 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "dup2");
660 GNUNET_break (0 == close (fd_stdin_read));
662 else if (0 == (std_inheritance & GNUNET_OS_INHERIT_STD_IN))
664 GNUNET_break (0 == close (0));
665 open_dev_null (0, O_RDONLY);
667 if (NULL != pipe_stdout)
669 GNUNET_break (0 == close (fd_stdout_read));
670 if (-1 == dup2 (fd_stdout_write, 1))
671 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "dup2");
672 GNUNET_break (0 == close (fd_stdout_write));
674 else if (0 == (std_inheritance & GNUNET_OS_INHERIT_STD_OUT))
676 GNUNET_break (0 == close (1));
677 open_dev_null (1, O_WRONLY);
679 if (NULL != pipe_stderr)
681 GNUNET_break (0 == close (fd_stderr_read));
682 if (-1 == dup2 (fd_stderr_write, 2))
683 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "dup2");
684 GNUNET_break (0 == close (fd_stderr_write));
686 else if (0 == (std_inheritance & GNUNET_OS_INHERIT_STD_ERR))
688 GNUNET_break (0 == close (2));
689 open_dev_null (2, O_WRONLY);
693 /* read systemd documentation... */
696 while (-1 != lscp[i])
699 while (-1 != lscp[j])
705 GNUNET_assert (-1 != k);
706 GNUNET_assert (0 == close (lscp[j]));
714 /* Bury any existing FD, no matter what; they should all be closed
715 * on exec anyway and the important onces have been dup'ed away */
717 GNUNET_assert (-1 != dup2 (lscp[i], tgt));
719 /* unset close-on-exec flag */
720 flags = fcntl (tgt, F_GETFD);
721 GNUNET_assert (flags >= 0);
722 flags &= ~FD_CLOEXEC;
724 (void) fcntl (tgt, F_SETFD, flags);
728 GNUNET_snprintf (fds, sizeof (fds), "%u", i);
729 setenv ("LISTEN_FDS", fds, 1);
732 /* due to vfork, we must NOT free memory on DARWIN! */
733 GNUNET_array_grow (lscp, ls, 0);
735 execvp (filename, argv);
736 LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_ERROR, "execvp", filename);
739 struct GNUNET_DISK_FileHandle *childpipe_read;
740 struct GNUNET_DISK_FileHandle *childpipe_write;
741 HANDLE childpipe_read_handle;
743 char **non_const_argv;
748 PROCESS_INFORMATION proc;
750 struct GNUNET_OS_Process *gnunet_proc;
751 char path[MAX_PATH + 1];
752 char *our_env[7] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL };
753 char *env_block = NULL;
761 char *non_const_filename;
762 char win_path[MAX_PATH + 1];
763 struct GNUNET_DISK_PipeHandle *lsocks_pipe;
764 const struct GNUNET_DISK_FileHandle *lsocks_write_fd;
775 HANDLE stdout_handle;
776 HANDLE stdih, stdoh, stdeh;
777 DWORD stdif, stdof, stdef;
780 DWORD create_no_window;
782 if (GNUNET_SYSERR == GNUNET_OS_check_helper_binary (filename, GNUNET_NO, NULL))
783 return NULL; /* not executable */
785 /* Search in prefix dir (hopefully - the directory from which
786 * the current module was loaded), bindir and libdir, then in PATH
788 self_prefix = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_SELF_PREFIX);
789 bindir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_BINDIR);
790 libdir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_LIBDIR);
792 pathbuf_len = GetEnvironmentVariableA ("PATH", (char *) &pathbuf, 0);
795 pathbuf_len + 1 + strlen (self_prefix) + 1 + strlen (bindir) + 1 +
798 pathbuf = GNUNET_malloc (alloc_len * sizeof (char));
801 ptr += sprintf (pathbuf, "%s;%s;%s;", self_prefix, bindir, libdir);
802 GNUNET_free (self_prefix);
803 GNUNET_free (bindir);
804 GNUNET_free (libdir);
806 alloc_len = GetEnvironmentVariableA ("PATH", ptr, pathbuf_len);
807 if (alloc_len != pathbuf_len - 1)
809 GNUNET_free (pathbuf);
810 errno = ENOSYS; /* PATH changed on the fly. What kind of error is that? */
814 cmdlen = strlen (filename);
815 if ( (cmdlen < 5) || (0 != strcmp (&filename[cmdlen - 4], ".exe")) )
816 GNUNET_asprintf (&non_const_filename, "%s.exe", filename);
818 GNUNET_asprintf (&non_const_filename, "%s", filename);
820 /* It could be in POSIX form, convert it to a DOS path early on */
821 if (ERROR_SUCCESS != (lRet = plibc_conv_to_win_path (non_const_filename, win_path)))
823 SetErrnoFromWinError (lRet);
824 LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_ERROR, "plibc_conv_to_win_path",
826 GNUNET_free (non_const_filename);
827 GNUNET_free (pathbuf);
830 GNUNET_free (non_const_filename);
831 non_const_filename = GNUNET_strdup (win_path);
832 /* Check that this is the full path. If it isn't, search. */
833 /* FIXME: convert it to wchar_t and use SearchPathW?
834 * Remember: arguments to _start_process() are technically in UTF-8...
836 if (non_const_filename[1] == ':')
838 snprintf (path, sizeof (path) / sizeof (char), "%s", non_const_filename);
839 LOG (GNUNET_ERROR_TYPE_DEBUG,
840 "Using path `%s' as-is. PATH is %s\n", path, ptr);
842 else if (!SearchPathA
843 (pathbuf, non_const_filename, NULL, sizeof (path) / sizeof (char),
846 SetErrnoFromWinError (GetLastError ());
847 LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_ERROR, "SearchPath",
849 GNUNET_free (non_const_filename);
850 GNUNET_free (pathbuf);
854 LOG (GNUNET_ERROR_TYPE_DEBUG,
855 "Found `%s' in PATH `%s'\n", path, pathbuf);
856 GNUNET_free (pathbuf);
857 GNUNET_free (non_const_filename);
859 /* Count the number of arguments */
860 arg = (char **) argv;
867 /* Allocate a copy argv */
868 non_const_argv = GNUNET_malloc (sizeof (char *) * (argcount + 1));
870 /* Copy all argv strings */
872 arg = (char **) argv;
876 non_const_argv[argcount] = GNUNET_strdup (path);
878 non_const_argv[argcount] = GNUNET_strdup (*arg);
882 non_const_argv[argcount] = NULL;
886 arg = non_const_argv;
889 cmdlen = cmdlen + strlen (*arg) + 4;
893 /* Allocate and create cmd */
894 cmd = idx = GNUNET_malloc (sizeof (char) * cmdlen);
895 arg = non_const_argv;
898 char arg_last_char = (*arg)[strlen (*arg) - 1];
899 idx += sprintf (idx, "\"%s%s\"%s", *arg,
900 arg_last_char == '\\' ? "\\" : "", *(arg + 1) ? " " : "");
905 GNUNET_free (non_const_argv[--argcount]);
906 GNUNET_free (non_const_argv);
908 memset (&start, 0, sizeof (start));
909 start.cb = sizeof (start);
910 if ((pipe_stdin != NULL) || (pipe_stdout != NULL) || (std_inheritance != 0))
911 start.dwFlags |= STARTF_USESTDHANDLES;
913 stdih = GetStdHandle (STD_INPUT_HANDLE);
914 GetHandleInformation (stdih, &stdif);
915 if (pipe_stdin != NULL)
917 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle
918 (pipe_stdin, GNUNET_DISK_PIPE_END_READ),
919 &stdin_handle, sizeof (HANDLE));
920 start.hStdInput = stdin_handle;
924 if (std_inheritance & GNUNET_OS_INHERIT_STD_IN)
926 SetHandleInformation (stdih, HANDLE_FLAG_INHERIT, 1);
927 if (pipe_stdin == NULL)
928 start.hStdInput = stdih;
931 SetHandleInformation (stdih, HANDLE_FLAG_INHERIT, 0);
935 stdoh = GetStdHandle (STD_OUTPUT_HANDLE);
936 GetHandleInformation (stdoh, &stdof);
937 if (NULL != pipe_stdout)
939 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle
941 GNUNET_DISK_PIPE_END_WRITE),
942 &stdout_handle, sizeof (HANDLE));
943 start.hStdOutput = stdout_handle;
947 if (std_inheritance & GNUNET_OS_INHERIT_STD_OUT)
949 SetHandleInformation (stdoh, HANDLE_FLAG_INHERIT, 1);
950 if (pipe_stdout == NULL)
951 start.hStdOutput = stdoh;
954 SetHandleInformation (stdoh, HANDLE_FLAG_INHERIT, 0);
957 stdeh = GetStdHandle (STD_ERROR_HANDLE);
958 GetHandleInformation (stdeh, &stdef);
961 if (std_inheritance & GNUNET_OS_INHERIT_STD_ERR)
963 SetHandleInformation (stdeh, HANDLE_FLAG_INHERIT, 1);
964 start.hStdError = stdeh;
967 SetHandleInformation (stdeh, HANDLE_FLAG_INHERIT, 0);
970 if (GNUNET_YES == pipe_control)
972 struct GNUNET_DISK_PipeHandle *childpipe;
973 childpipe = GNUNET_DISK_pipe (GNUNET_NO, GNUNET_NO, GNUNET_YES, GNUNET_NO);
974 if (NULL == childpipe)
976 childpipe_read = GNUNET_DISK_pipe_detach_end (childpipe, GNUNET_DISK_PIPE_END_READ);
977 childpipe_write = GNUNET_DISK_pipe_detach_end (childpipe, GNUNET_DISK_PIPE_END_WRITE);
978 GNUNET_DISK_pipe_close (childpipe);
979 if ((NULL == childpipe_read) || (NULL == childpipe_write) ||
980 (GNUNET_OK != GNUNET_DISK_internal_file_handle_ (childpipe_read,
981 &childpipe_read_handle, sizeof (HANDLE))))
984 GNUNET_DISK_file_close (childpipe_read);
986 GNUNET_DISK_file_close (childpipe_write);
990 /* Unlike *nix variant, we don't dup the handle, so can't close
991 * filehandle right now.
993 SetHandleInformation (childpipe_read_handle, HANDLE_FLAG_INHERIT, 1);
997 childpipe_read = NULL;
998 childpipe_write = NULL;
1001 if (lsocks != NULL && lsocks[0] != INVALID_SOCKET)
1003 lsocks_pipe = GNUNET_DISK_pipe (GNUNET_YES, GNUNET_YES, GNUNET_YES, GNUNET_NO);
1005 if (lsocks_pipe == NULL)
1008 GNUNET_DISK_pipe_close (lsocks_pipe);
1009 if (GNUNET_YES == pipe_control)
1011 GNUNET_DISK_file_close (childpipe_write);
1012 GNUNET_DISK_file_close (childpipe_read);
1016 lsocks_write_fd = GNUNET_DISK_pipe_handle (lsocks_pipe,
1017 GNUNET_DISK_PIPE_END_WRITE);
1018 GNUNET_DISK_internal_file_handle_ (lsocks_write_fd,
1019 &lsocks_write, sizeof (HANDLE));
1020 GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle
1021 (lsocks_pipe, GNUNET_DISK_PIPE_END_READ),
1022 &lsocks_read, sizeof (HANDLE));
1028 if (GNUNET_YES == pipe_control)
1030 GNUNET_asprintf (&our_env[env_off++], "%s=", GNUNET_OS_CONTROL_PIPE);
1031 GNUNET_asprintf (&our_env[env_off++], "%p", childpipe_read_handle);
1033 if ( (lsocks != NULL) && (lsocks[0] != INVALID_SOCKET))
1035 /*This will tell the child that we're going to send lsocks over the pipe*/
1036 GNUNET_asprintf (&our_env[env_off++], "%s=", "GNUNET_OS_READ_LSOCKS");
1037 GNUNET_asprintf (&our_env[env_off++], "%lu", lsocks_read);
1039 our_env[env_off++] = NULL;
1040 env_block = CreateCustomEnvTable (our_env);
1042 GNUNET_free_non_null (our_env[--env_off]);
1045 if (NULL == (wpath = u8_to_u16 ((uint8_t *) path, 1 + strlen (path), NULL, &wpath_len)))
1047 LOG (GNUNET_ERROR_TYPE_DEBUG,
1048 "Failed to convert `%s' from UTF-8 to UTF-16: %d\n", path, errno);
1049 GNUNET_free (env_block);
1052 GNUNET_DISK_pipe_close (lsocks_pipe);
1053 if (GNUNET_YES == pipe_control)
1055 GNUNET_DISK_file_close (childpipe_write);
1056 GNUNET_DISK_file_close (childpipe_read);
1062 if (NULL == (wcmd = u8_to_u16 ((uint8_t *) cmd, 1 + strlen (cmd), NULL, &wcmd_len)))
1064 LOG (GNUNET_ERROR_TYPE_DEBUG,
1065 "Failed to convert `%s' from UTF-8 to UTF-16: %d\n", cmd, errno);
1066 GNUNET_free (env_block);
1070 GNUNET_DISK_pipe_close (lsocks_pipe);
1071 if (GNUNET_YES == pipe_control)
1073 GNUNET_DISK_file_close (childpipe_write);
1074 GNUNET_DISK_file_close (childpipe_read);
1079 create_no_window = 0;
1081 HANDLE console_input = CreateFile ("CONIN$", GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
1082 if (INVALID_HANDLE_VALUE == console_input)
1083 create_no_window = CREATE_NO_WINDOW;
1085 CloseHandle (console_input);
1088 bresult = CreateProcessW (wpath, wcmd, NULL, NULL, GNUNET_YES,
1089 create_no_window | CREATE_SUSPENDED, env_block, NULL, &start, &proc);
1090 error_code = GetLastError ();
1092 if ((NULL == pipe_stdin) && (stdih))
1093 SetHandleInformation (stdih, HANDLE_FLAG_INHERIT, stdif);
1096 if ((NULL == pipe_stdout) && (stdoh))
1097 SetHandleInformation (stdoh, HANDLE_FLAG_INHERIT, stdof);
1100 SetHandleInformation (stdeh, HANDLE_FLAG_INHERIT, stdef);
1103 LOG (GNUNET_ERROR_TYPE_ERROR, "CreateProcess(%s, %s) failed: %lu\n", path, cmd, error_code);
1105 GNUNET_free (env_block);
1109 if (GNUNET_YES == pipe_control)
1111 GNUNET_DISK_file_close (childpipe_read);
1116 if (GNUNET_YES == pipe_control)
1118 GNUNET_DISK_file_close (childpipe_write);
1121 GNUNET_DISK_pipe_close (lsocks_pipe);
1122 SetErrnoFromWinError (error_code);
1126 gnunet_proc = GNUNET_new (struct GNUNET_OS_Process);
1127 gnunet_proc->pid = proc.dwProcessId;
1128 gnunet_proc->handle = proc.hProcess;
1129 gnunet_proc->control_pipe = childpipe_write;
1131 CreateThread (NULL, 64000, &child_wait_thread, (void *) gnunet_proc, 0, NULL);
1133 ResumeThread (proc.hThread);
1134 CloseHandle (proc.hThread);
1136 if ( (NULL == lsocks) || (INVALID_SOCKET == lsocks[0]) )
1139 GNUNET_DISK_pipe_close_end (lsocks_pipe, GNUNET_DISK_PIPE_END_READ);
1141 /* This is a replacement for "goto error" that doesn't use goto */
1150 /* Tell the number of sockets */
1151 for (count = 0; lsocks && lsocks[count] != INVALID_SOCKET; count++);
1153 wrote = GNUNET_DISK_file_write (lsocks_write_fd, &count, sizeof (count));
1154 if (sizeof (count) != wrote)
1156 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1157 "Failed to write %u count bytes to the child: %u\n",
1158 sizeof (count), GetLastError ());
1161 for (i = 0; lsocks && lsocks[i] != INVALID_SOCKET; i++)
1163 WSAPROTOCOL_INFOA pi;
1164 /* Get a socket duplication info */
1165 if (SOCKET_ERROR == WSADuplicateSocketA (lsocks[i], gnunet_proc->pid, &pi))
1167 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1168 "Failed to duplicate an socket[%llu]: %u\n", i,
1172 /* Synchronous I/O is not nice, but we can't schedule this:
1173 * lsocks will be closed/freed by the caller soon, and until
1174 * the child creates a duplicate, closing a socket here will
1175 * close it for good.
1177 /* Send the size of the structure
1178 * (the child might be built with different headers...)
1181 wrote = GNUNET_DISK_file_write (lsocks_write_fd, &size, sizeof (size));
1182 if (sizeof (size) != wrote)
1184 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1185 "Failed to write %u size[%llu] bytes to the child: %u\n",
1186 sizeof (size), i, GetLastError ());
1189 /* Finally! Send the data */
1190 wrote = GNUNET_DISK_file_write (lsocks_write_fd, &pi, sizeof (pi));
1191 if (sizeof (pi) != wrote)
1193 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1194 "Failed to write %u socket[%llu] bytes to the child: %u\n",
1195 sizeof (pi), i, GetLastError ());
1199 /* This will block us until the child makes a final read or closes
1200 * the pipe (hence no 'wrote' check), since we have to wait for it
1201 * to duplicate the last socket, before we return and start closing
1204 wrote = GNUNET_DISK_file_write (lsocks_write_fd, &count, sizeof (count));
1209 GNUNET_DISK_file_sync (lsocks_write_fd);
1210 GNUNET_DISK_pipe_close (lsocks_pipe);
1214 /* If we can't pass on the socket(s), the child will block forever,
1215 * better put it out of its misery.
1217 SafeTerminateProcess (gnunet_proc->handle, 0, 0);
1218 CloseHandle (gnunet_proc->handle);
1219 if (NULL != gnunet_proc->control_pipe)
1220 GNUNET_DISK_file_close (gnunet_proc->control_pipe);
1221 GNUNET_free (gnunet_proc);
1232 * @param pipe_control should a pipe be used to send signals to the child?
1233 * @param std_inheritance a set of GNUNET_OS_INHERIT_STD_* flags
1234 * @param pipe_stdin pipe to use to send input to child process (or NULL)
1235 * @param pipe_stdout pipe to use to get output from child process (or NULL)
1236 * @param pipe_stderr pipe to use to get output from child process (or NULL)
1237 * @param filename name of the binary
1238 * @param argv NULL-terminated array of arguments to the process
1239 * @return pointer to process structure of the new process, NULL on error
1241 struct GNUNET_OS_Process *
1242 GNUNET_OS_start_process_vap (int pipe_control,
1243 enum GNUNET_OS_InheritStdioFlags std_inheritance,
1244 struct GNUNET_DISK_PipeHandle *pipe_stdin,
1245 struct GNUNET_DISK_PipeHandle *pipe_stdout,
1246 struct GNUNET_DISK_PipeHandle *pipe_stderr,
1247 const char *filename,
1250 return start_process (pipe_control,
1264 * @param pipe_control should a pipe be used to send signals to the child?
1265 * @param std_inheritance a set of GNUNET_OS_INHERIT_STD_* flags
1266 * @param pipe_stdin pipe to use to send input to child process (or NULL)
1267 * @param pipe_stdout pipe to use to get output from child process (or NULL)
1268 * @param pipe_stderr pipe to use to get output from child process (or NULL)
1269 * @param filename name of the binary
1270 * @param va NULL-terminated list of arguments to the process
1271 * @return pointer to process structure of the new process, NULL on error
1273 struct GNUNET_OS_Process *
1274 GNUNET_OS_start_process_va (int pipe_control,
1275 enum GNUNET_OS_InheritStdioFlags std_inheritance,
1276 struct GNUNET_DISK_PipeHandle *pipe_stdin,
1277 struct GNUNET_DISK_PipeHandle *pipe_stdout,
1278 struct GNUNET_DISK_PipeHandle *pipe_stderr,
1279 const char *filename, va_list va)
1281 struct GNUNET_OS_Process *ret;
1288 while (NULL != va_arg (ap, char *))
1291 argv = GNUNET_malloc (sizeof (char *) * (argc + 1));
1294 while (NULL != (argv[argc] = va_arg (ap, char *)))
1297 ret = GNUNET_OS_start_process_vap (pipe_control,
1312 * @param pipe_control should a pipe be used to send signals to the child?
1313 * @param std_inheritance a set of GNUNET_OS_INHERIT_STD_* flags
1314 * @param pipe_stdin pipe to use to send input to child process (or NULL)
1315 * @param pipe_stdout pipe to use to get output from child process (or NULL)
1316 * @param filename name of the binary
1317 * @param ... NULL-terminated list of arguments to the process
1318 * @return pointer to process structure of the new process, NULL on error
1320 struct GNUNET_OS_Process *
1321 GNUNET_OS_start_process (int pipe_control,
1322 enum GNUNET_OS_InheritStdioFlags std_inheritance,
1323 struct GNUNET_DISK_PipeHandle *pipe_stdin,
1324 struct GNUNET_DISK_PipeHandle *pipe_stdout,
1325 struct GNUNET_DISK_PipeHandle *pipe_stderr,
1326 const char *filename, ...)
1328 struct GNUNET_OS_Process *ret;
1331 va_start (ap, filename);
1332 ret = GNUNET_OS_start_process_va (pipe_control,
1347 * @param pipe_control should a pipe be used to send signals to the child?
1348 * @param std_inheritance a set of GNUNET_OS_INHERIT_STD_* flags controlling which
1349 * std handles of the parent are inherited by the child.
1350 * pipe_stdin and pipe_stdout take priority over std_inheritance
1351 * (when they are non-NULL).
1352 * @param lsocks array of listen sockets to dup systemd-style (or NULL);
1353 * must be NULL on platforms where dup is not supported
1354 * @param filename name of the binary
1355 * @param argv NULL-terminated list of arguments to the process
1356 * @return process ID of the new process, -1 on error
1358 struct GNUNET_OS_Process *
1359 GNUNET_OS_start_process_v (int pipe_control,
1360 enum GNUNET_OS_InheritStdioFlags std_inheritance,
1361 const SOCKTYPE *lsocks,
1362 const char *filename,
1365 return start_process (pipe_control,
1377 * Start a process. This function is similar to the GNUNET_OS_start_process_*
1378 * except that the filename and arguments can have whole strings which contain
1379 * the arguments. These arguments are to be separated by spaces and are parsed
1380 * in the order they appear. Arguments containing spaces can be used by
1381 * quoting them with @em ".
1383 * @param pipe_control should a pipe be used to send signals to the child?
1384 * @param std_inheritance a set of GNUNET_OS_INHERIT_STD_* flags
1385 * @param lsocks array of listen sockets to dup systemd-style (or NULL);
1386 * must be NULL on platforms where dup is not supported
1387 * @param filename name of the binary. It is valid to have the arguments
1388 * in this string when they are separated by spaces.
1389 * @param ... more arguments. Should be of type `char *`. It is valid
1390 * to have the arguments in these strings when they are separated by
1391 * spaces. The last argument MUST be NULL.
1392 * @return pointer to process structure of the new process, NULL on error
1394 struct GNUNET_OS_Process *
1395 GNUNET_OS_start_process_s (int pipe_control,
1396 unsigned int std_inheritance,
1397 const SOCKTYPE * lsocks,
1398 const char *filename, ...)
1402 unsigned int argv_size;
1408 struct GNUNET_OS_Process *proc;
1415 va_start (ap, filename);
1422 while ('\0' != *rpos)
1431 if ( (' ' == *rpos) && (0 == quote_on) )
1437 while (' ' == *rpos)
1440 if ( (NULL == last) && ('\0' != *rpos) ) // FIXME: == or !=?
1448 while (NULL != (arg = (va_arg (ap, const char*))));
1451 argv = GNUNET_malloc (argv_size * sizeof (char *));
1453 va_start (ap, filename);
1458 cp = GNUNET_strdup (arg);
1461 while ('\0' != *pos)
1470 if ( (' ' == *pos) && (0 == quote_on) )
1474 argv[argv_size++] = GNUNET_strdup (last);
1480 if ( (NULL == last) && ('\0' != *pos)) // FIXME: == or !=?
1486 argv[argv_size++] = GNUNET_strdup (last);
1490 while (NULL != (arg = (va_arg (ap, const char*))));
1492 argv[argv_size] = NULL;
1494 for(i = 0; i < argv_size; i++)
1496 len = strlen (argv[i]);
1497 if ( (argv[i][0] == '"') && (argv[i][len-1] == '"'))
1499 memmove (&argv[i][0], &argv[i][1], len - 2);
1500 argv[i][len-2] = '\0';
1503 binary_path = argv[0];
1504 proc = GNUNET_OS_start_process_v (pipe_control, std_inheritance, lsocks,
1506 while (argv_size > 0)
1507 GNUNET_free (argv[--argv_size]);
1514 * Retrieve the status of a process, waiting on him if dead.
1515 * Nonblocking version.
1517 * @param proc process ID
1518 * @param type status type
1519 * @param code return code/signal number
1520 * @return GNUNET_OK on success, GNUNET_NO if the process is still running, GNUNET_SYSERR otherwise
1523 GNUNET_OS_process_status (struct GNUNET_OS_Process *proc,
1524 enum GNUNET_OS_ProcessStatusType *type,
1525 unsigned long *code)
1531 GNUNET_assert (0 != proc);
1532 ret = waitpid (proc->pid, &status, WNOHANG);
1535 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "waitpid");
1536 return GNUNET_SYSERR;
1540 *type = GNUNET_OS_PROCESS_RUNNING;
1544 if (proc->pid != ret)
1546 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "waitpid");
1547 return GNUNET_SYSERR;
1549 if (WIFEXITED (status))
1551 *type = GNUNET_OS_PROCESS_EXITED;
1552 *code = WEXITSTATUS (status);
1554 else if (WIFSIGNALED (status))
1556 *type = GNUNET_OS_PROCESS_SIGNALED;
1557 *code = WTERMSIG (status);
1559 else if (WIFSTOPPED (status))
1561 *type = GNUNET_OS_PROCESS_SIGNALED;
1562 *code = WSTOPSIG (status);
1565 else if (WIFCONTINUED (status))
1567 *type = GNUNET_OS_PROCESS_RUNNING;
1573 *type = GNUNET_OS_PROCESS_UNKNOWN;
1578 DWORD c, error_code, ret;
1582 if (h == NULL || ret == 0)
1584 LOG (GNUNET_ERROR_TYPE_WARNING, "Invalid process information {%d, %08X}\n",
1586 return GNUNET_SYSERR;
1589 h = GetCurrentProcess ();
1592 ret = GetExitCodeProcess (h, &c);
1593 error_code = GetLastError ();
1594 if (ret == 0 || error_code != NO_ERROR)
1596 SetErrnoFromWinError (error_code);
1597 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "GetExitCodeProcess");
1598 return GNUNET_SYSERR;
1600 if (STILL_ACTIVE == c)
1602 *type = GNUNET_OS_PROCESS_RUNNING;
1606 *type = GNUNET_OS_PROCESS_EXITED;
1615 * Wait for a process
1617 * @param proc pointer to process structure
1618 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
1621 GNUNET_OS_process_wait (struct GNUNET_OS_Process *proc)
1624 pid_t pid = proc->pid;
1627 while ( (pid != (ret = waitpid (pid, NULL, 0))) &&
1628 (EINTR == errno) ) ;
1631 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "waitpid");
1632 return GNUNET_SYSERR;
1641 LOG (GNUNET_ERROR_TYPE_WARNING, "Invalid process information {%d, %08X}\n",
1643 return GNUNET_SYSERR;
1646 h = GetCurrentProcess ();
1648 if (WAIT_OBJECT_0 != WaitForSingleObject (h, INFINITE))
1650 SetErrnoFromWinError (GetLastError ());
1651 return GNUNET_SYSERR;
1659 * Handle to a command.
1661 struct GNUNET_OS_CommandHandle
1667 struct GNUNET_OS_Process *eip;
1670 * Handle to the output pipe.
1672 struct GNUNET_DISK_PipeHandle *opipe;
1675 * Read-end of output pipe.
1677 const struct GNUNET_DISK_FileHandle *r;
1680 * Function to call on each line of output.
1682 GNUNET_OS_LineProcessor proc;
1685 * Closure for 'proc'.
1690 * Buffer for the output.
1695 * Task reading from pipe.
1697 struct GNUNET_SCHEDULER_Task * rtask;
1702 struct GNUNET_TIME_Absolute timeout;
1705 * Current read offset in buf.
1712 * Stop/kill a command. Must ONLY be called either from
1713 * the callback after 'NULL' was passed for 'line' *OR*
1714 * from an independent task (not within the line processor).
1716 * @param cmd handle to the process
1719 GNUNET_OS_command_stop (struct GNUNET_OS_CommandHandle *cmd)
1721 if (NULL != cmd->proc)
1723 GNUNET_assert (NULL != cmd->rtask);
1724 GNUNET_SCHEDULER_cancel (cmd->rtask);
1726 (void) GNUNET_OS_process_kill (cmd->eip, SIGKILL);
1727 GNUNET_break (GNUNET_OK == GNUNET_OS_process_wait (cmd->eip));
1728 GNUNET_OS_process_destroy (cmd->eip);
1729 GNUNET_DISK_pipe_close (cmd->opipe);
1735 * Read from the process and call the line processor.
1737 * @param cls the 'struct GNUNET_OS_CommandHandle'
1738 * @param tc scheduler context
1741 cmd_read (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1743 struct GNUNET_OS_CommandHandle *cmd = cls;
1744 GNUNET_OS_LineProcessor proc;
1749 if (GNUNET_YES != GNUNET_NETWORK_fdset_handle_isset (tc->read_ready, cmd->r))
1751 /* timeout, shutdown, etc. */
1754 proc (cmd->proc_cls, NULL);
1758 GNUNET_DISK_file_read (cmd->r, &cmd->buf[cmd->off],
1759 sizeof (cmd->buf) - cmd->off);
1762 if ((cmd->off > 0) && (cmd->off < sizeof (cmd->buf)))
1764 cmd->buf[cmd->off] = '\0';
1765 cmd->proc (cmd->proc_cls, cmd->buf);
1769 proc (cmd->proc_cls, NULL);
1772 end = memchr (&cmd->buf[cmd->off], '\n', ret);
1777 cmd->proc (cmd->proc_cls, cmd->buf);
1778 memmove (cmd->buf, end + 1, cmd->off - (end + 1 - cmd->buf));
1779 cmd->off -= (end + 1 - cmd->buf);
1780 end = memchr (cmd->buf, '\n', cmd->off);
1783 GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_absolute_get_remaining
1784 (cmd->timeout), cmd->r, &cmd_read, cmd);
1789 * Run the given command line and call the given function
1790 * for each line of the output.
1792 * @param proc function to call for each line of the output
1793 * @param proc_cls closure for proc
1794 * @param timeout when to time out
1795 * @param binary command to run
1796 * @param ... arguments to command
1797 * @return NULL on error
1799 struct GNUNET_OS_CommandHandle *
1800 GNUNET_OS_command_run (GNUNET_OS_LineProcessor proc, void *proc_cls,
1801 struct GNUNET_TIME_Relative timeout, const char *binary,
1804 struct GNUNET_OS_CommandHandle *cmd;
1805 struct GNUNET_OS_Process *eip;
1806 struct GNUNET_DISK_PipeHandle *opipe;
1809 opipe = GNUNET_DISK_pipe (GNUNET_YES, GNUNET_YES, GNUNET_NO, GNUNET_YES);
1812 va_start (ap, binary);
1813 /* redirect stdout, don't inherit stderr/stdin */
1814 eip = GNUNET_OS_start_process_va (GNUNET_NO, 0, NULL, opipe, NULL, binary, ap);
1818 GNUNET_DISK_pipe_close (opipe);
1821 GNUNET_DISK_pipe_close_end (opipe, GNUNET_DISK_PIPE_END_WRITE);
1822 cmd = GNUNET_new (struct GNUNET_OS_CommandHandle);
1823 cmd->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1827 cmd->proc_cls = proc_cls;
1828 cmd->r = GNUNET_DISK_pipe_handle (opipe, GNUNET_DISK_PIPE_END_READ);
1829 cmd->rtask = GNUNET_SCHEDULER_add_read_file (timeout, cmd->r, &cmd_read, cmd);
1834 /* end of os_priority.c */