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/*
* BRLTTY - A background process providing access to the console screen (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2014 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU General Public License, as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any
* later version. Please see the file LICENSE-GPL for details.
*
* Web Page: http://mielke.cc/brltty/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include <errno.h>
#include "pid.h"
#if defined(__MSDOS__) || defined(GRUB_RUNTIME)
ProcessIdentifier
getProcessIdentifier (void) {
return MY_PROCESS_ID;
}
int
testProcessIdentifier (ProcessIdentifier pid) {
return pid == MY_PROCESS_ID;
}
int
cancelProcess (ProcessIdentifier pid) {
errno = ENOSYS;
return 0;
}
#elif defined(__MINGW32__)
ProcessIdentifier
getProcessIdentifier (void) {
return GetCurrentProcessId();
}
int
testProcessIdentifier (ProcessIdentifier pid) {
HANDLE handle = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
if (!handle) return 0;
CloseHandle(handle);
return 1;
}
int
cancelProcess (ProcessIdentifier pid) {
errno = ENOSYS;
return 0;
}
#else /* Unix */
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif /* HAVE_SIGNAL_H */
ProcessIdentifier
getProcessIdentifier (void) {
return getpid();
}
int
testProcessIdentifier (ProcessIdentifier pid) {
return kill(pid, 0) != -1;
}
int
cancelProcess (ProcessIdentifier pid) {
if (kill(pid, SIGTERM) != -1) return 1;
return 0;
}
#endif /* pid support */
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