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/*
This file is part of GNUnet
(C) 2002, 2003, 2004, 2005, 2006 Christian Grothoff (and other contributing authors)
GNUnet 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.
GNUnet 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 GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file util/os/priority.c
* @brief Methods to set process priority
* @author Nils Durner
*/
#include "platform.h"
#include "gnunet_common.h"
#include "gnunet_os_lib.h"
/**
* Set our process priority
*/
int
GNUNET_OS_set_process_priority (pid_t proc,
enum GNUNET_SCHEDULER_Priority eprio)
{
int prio = 0;
GNUNET_assert (eprio < GNUNET_SCHEDULER_PRIORITY_COUNT);
if (eprio == GNUNET_SCHEDULER_PRIORITY_KEEP)
return GNUNET_OK;
/* convert to MINGW/Unix values */
switch (eprio)
{
case GNUNET_SCHEDULER_PRIORITY_DEFAULT:
#ifdef MINGW
prio = NORMAL_PRIORITY_CLASS;
#else
prio = 0;
#endif
break;
case GNUNET_SCHEDULER_PRIORITY_HIGH:
#ifdef MINGW
prio = ABOVE_NORMAL_PRIORITY_CLASS;
#else
prio = -5;
#endif
break;
case GNUNET_SCHEDULER_PRIORITY_BACKGROUND:
#ifdef MINGW
prio = BELOW_NORMAL_PRIORITY_CLASS;
#else
prio = 10;
#endif
break;
case GNUNET_SCHEDULER_PRIORITY_UI:
case GNUNET_SCHEDULER_PRIORITY_URGENT:
#ifdef MINGW
prio = HIGH_PRIORITY_CLASS;
#else
prio = -10;
#endif
break;
case GNUNET_SCHEDULER_PRIORITY_IDLE:
#ifdef MINGW
prio = IDLE_PRIORITY_CLASS;
#else
prio = 19;
#endif
break;
default:
GNUNET_assert (0);
return GNUNET_SYSERR;
}
/* Set process priority */
#ifdef MINGW
SetPriorityClass (GetCurrentProcess (), prio);
#else
if (proc == getpid ())
{
errno = 0;
if ((-1 == nice (prio)) && (errno != 0))
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING |
GNUNET_ERROR_TYPE_BULK, "nice");
return GNUNET_SYSERR;
}
}
else
{
if (0 != setpriority (PRIO_PROCESS, proc, prio))
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING |
GNUNET_ERROR_TYPE_BULK, "setpriority");
return GNUNET_SYSERR;
}
}
#endif
return GNUNET_OK;
}
/**
* Start a process.
*
* @param filename name of the binary
* @param ... NULL-terminated list of arguments to the process
* @return process ID of the new process, -1 on error
*/
pid_t
GNUNET_OS_start_process (const char *filename, ...)
{
va_list ap;
#ifndef MINGW
pid_t ret;
char **argv;
int argc;
ret = fork ();
if (ret != 0)
{
if (ret == -1)
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
return ret;
}
argc = 0;
va_start (ap, filename);
while (NULL != va_arg (ap, char *))
argc++;
va_end (ap);
argv = GNUNET_malloc (sizeof (char *) * (argc + 1));
argc = 0;
va_start (ap, filename);
while (NULL != (argv[argc] = va_arg (ap, char *)))
argc++;
va_end (ap);
execvp (filename, argv);
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "execvp", filename);
exit (1);
#else
char *arg;
unsigned int cmdlen;
char *cmd, *idx;
STARTUPINFO start;
PROCESS_INFORMATION proc;
cmdlen = 0;
va_start (ap, filename);
while (NULL != (arg = va_arg (ap, char *)))
cmdlen = cmdlen + strlen (arg) + 3;
va_end (ap);
cmd = idx = GNUNET_malloc (sizeof(char) * cmdlen);
va_start (ap, filename);
while (NULL != (arg = va_arg (ap, char *)))
idx += sprintf (idx, "\"%s\" ", arg);
va_end (ap);
memset (&start, 0, sizeof(start));
start.cb = sizeof(start);
if (!CreateProcess (filename, cmd, NULL, NULL, FALSE, DETACHED_PROCESS, NULL,
NULL, &start, &proc))
{
SetErrnoFromWinError (GetLastError ());
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
return -1;
}
CloseHandle (proc.hProcess);
CloseHandle (proc.hThread);
GNUNET_free(cmd);
return proc.dwProcessId;
#endif
}
/**
* Start a process.
*
* @param filename name of the binary
* @param argv NULL-terminated list of arguments to the process
* @return process ID of the new process, -1 on error
*/
pid_t
GNUNET_OS_start_process_v (const char *filename, char *const argv[])
{
#ifndef MINGW
pid_t ret;
ret = fork ();
if (ret != 0)
{
if (ret == -1)
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
return ret;
}
execvp (filename, argv);
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "execvp", filename);
exit (1);
#else
char **arg;
unsigned int cmdlen;
char *cmd, *idx;
STARTUPINFO start;
PROCESS_INFORMATION proc;
cmdlen = 0;
arg = argv;
while (*arg)
{
cmdlen = cmdlen + strlen (*arg) + 3;
arg++;
}
cmd = idx = GNUNET_malloc (sizeof(char) * cmdlen);
arg = argv;
while (*arg)
{
idx += sprintf (idx, "\"%s\" ", *arg);
arg++;
}
memset (&start, 0, sizeof(start));
start.cb = sizeof(start);
if (!CreateProcess (filename, cmd, NULL, NULL, FALSE, DETACHED_PROCESS, NULL,
NULL, &start, &proc))
{
SetErrnoFromWinError (GetLastError ());
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
return -1;
}
CloseHandle (proc.hProcess);
CloseHandle (proc.hThread);
GNUNET_free(cmd);
return proc.dwProcessId;
#endif
}
/**
* Retrieve the status of a process
* @param proc process ID
* @param type status type
* @param code return code/signal number
* @return GNUNET_OK on success, GNUNET_NO if the process is still running, GNUNET_SYSERR otherwise
*/
int
GNUNET_OS_process_status (pid_t proc, enum GNUNET_OS_ProcessStatusType *type,
unsigned long *code)
{
#ifndef MINGW
int status;
int ret;
GNUNET_assert (0 != proc);
ret = waitpid (proc, &status, WNOHANG);
if (0 == ret)
{
*type = GNUNET_OS_PROCESS_RUNNING;
*code = 0;
return GNUNET_NO;
}
if (proc != ret)
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "waitpid");
return GNUNET_SYSERR;
}
if (WIFEXITED (status))
{
*type = GNUNET_OS_PROCESS_EXITED;
*code = WEXITSTATUS (status);
}
else if (WIFSIGNALED (status))
{
*type = GNUNET_OS_PROCESS_SIGNALED;
*code = WTERMSIG (status);
}
else if (WIFSTOPPED (status))
{
*type = GNUNET_OS_PROCESS_SIGNALED;
*code = WSTOPSIG (status);
}
else if (WIFCONTINUED (status))
{
*type = GNUNET_OS_PROCESS_RUNNING;
*code = 0;
}
else
{
*type = GNUNET_OS_PROCESS_UNKNOWN;
*code = 0;
}
#else
HANDLE h;
DWORD c;
h = OpenProcess (PROCESS_QUERY_INFORMATION, FALSE, proc);
if (INVALID_HANDLE_VALUE == h)
{
SetErrnoFromWinError (GetLastError ());
GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "OpenProcess");
return GNUNET_SYSERR;
}
c = GetExitCodeProcess (proc, &c);
if (STILL_ACTIVE == c)
{
*type = GNUNET_OS_PROCESS_RUNNING;
*code = 0;
CloseHandle (h);
return GNUNET_NO;
}
*type = GNUNET_OS_PROCESS_EXITED;
*code = c;
CloseHandle (h);
#endif
return GNUNET_OK;
}
/**
* Wait for a process
* @param proc process ID to wait for
* @return GNUNET_OK on success, GNUNET_SYSERR otherwise
*/
int
GNUNET_OS_process_wait (pid_t proc)
{
#ifndef MINGW
if (proc != waitpid (proc, NULL, 0))
return GNUNET_SYSERR;
return GNUNET_OK;
#else
HANDLE h;
DWORD c;
int ret;
h = OpenProcess (PROCESS_QUERY_INFORMATION, FALSE, proc);
if (INVALID_HANDLE_VALUE == h)
{
SetErrnoFromWinError (GetLastError ());
return GNUNET_SYSERR;
}
if (WAIT_OBJECT_0 != WaitForSingleObject (h, INFINITE))
{
SetErrnoFromWinError (GetLastError ());
ret = GNUNET_SYSERR;
}
else
ret = GNUNET_OK;
CloseHandle (h);
return ret;
#endif
}
/* end of os_priority.c */
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