Chris@49: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@0: 
Chris@0: /*
Chris@52:     Sonic Visualiser
Chris@52:     An audio file viewer and annotation editor.
Chris@52:     Centre for Digital Music, Queen Mary, University of London.
Chris@52:     This file copyright 2006 Chris Cannam.
Chris@0:     
Chris@52:     This program is free software; you can redistribute it and/or
Chris@52:     modify it under the terms of the GNU General Public License as
Chris@52:     published by the Free Software Foundation; either version 2 of the
Chris@52:     License, or (at your option) any later version.  See the file
Chris@52:     COPYING included with this distribution for more information.
Chris@0: */
Chris@0: 
Chris@0: #include "System.h"
Chris@0: 
Chris@98: #ifdef __APPLE__
Chris@98: #include <sys/types.h>
Chris@98: #include <sys/sysctl.h>
Chris@98: #else
Chris@98: #ifndef _WIN32
Chris@98: #include <unistd.h>
Chris@98: #include <cstdio>
Chris@98: #include <sys/types.h>
Chris@98: #include <sys/stat.h>
Chris@98: #include <errno.h>
Chris@98: #endif
Chris@98: #endif
Chris@98: 
Chris@98: #include <iostream>
Chris@98: 
Chris@0: #ifdef _WIN32
Chris@0: 
Chris@0: extern "C" {
Chris@0: 
Chris@0: void gettimeofday(struct timeval *tv, void *tz)
Chris@0: {
Chris@0:     union { 
Chris@0: 	long long ns100;  
Chris@0: 	FILETIME ft; 
Chris@0:     } now; 
Chris@0:     
Chris@0:     GetSystemTimeAsFileTime(&now.ft); 
Chris@0:     tv->tv_usec = (long)((now.ns100 / 10LL) % 1000000LL); 
Chris@0:     tv->tv_sec = (long)((now.ns100 - 116444736000000000LL) / 10000000LL); 
Chris@0: }
Chris@0: 
Chris@0: }
Chris@0: 
Chris@0: #endif
Chris@98: 
Chris@98: ProcessStatus
Chris@98: GetProcessStatus(int pid)
Chris@98: {
Chris@98: #ifdef __APPLE__
Chris@98: 
Chris@98:     // See
Chris@98:     // http://tuvix.apple.com/documentation/Darwin/Reference/ManPages/man3/sysctl.3.html
Chris@98:     // http://developer.apple.com/qa/qa2001/qa1123.html
Chris@98: 
Chris@98:     int name[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, 0, 0 };
Chris@98:     name[3] = pid;
Chris@98: 
Chris@98:     int err;
Chris@98:     size_t length = 0;
Chris@98: 
Chris@98:     if (sysctl(name, 4, 0, &length, 0, 0)) {
Chris@98:         perror("GetProcessStatus: sysctl failed");
Chris@98:         return UnknownProcessStatus;
Chris@98:     }
Chris@98: 
Chris@98:     if (length > 0) return ProcessRunning;
Chris@98:     else return ProcessNotRunning;
Chris@98: 
Chris@98: #elsif _WIN32
Chris@98: 
Chris@98:     return UnknownProcessStatus;
Chris@98: 
Chris@98: #else
Chris@98: 
Chris@98:     char filename[50];
Chris@98:     struct stat statbuf;
Chris@98: 
Chris@98:     // Looking up the pid in /proc is worth a try on any POSIX system,
Chris@98:     // I guess -- it'll always compile and it won't return false
Chris@98:     // negatives if we do this first check:
Chris@98: 
Chris@98:     sprintf(filename, "/proc/%d", (int)getpid());
Chris@98: 
Chris@98:     int err = stat(filename, &statbuf);
Chris@98: 
Chris@98:     if (err || !S_ISDIR(statbuf.st_mode)) {
Chris@98:         // If we can't even use it to tell whether we're running or
Chris@98:         // not, then clearly /proc is no use on this system.
Chris@98:         return UnknownProcessStatus;
Chris@98:     }
Chris@98: 
Chris@98:     sprintf(filename, "/proc/%d", (int)pid);
Chris@98: 
Chris@98:     err = stat(filename, &statbuf);
Chris@98: 
Chris@98:     if (!err) {
Chris@98:         if (S_ISDIR(statbuf.st_mode)) {
Chris@98:             return ProcessRunning;
Chris@98:         } else {
Chris@98:             return UnknownProcessStatus;
Chris@98:         }
Chris@98:     } else if (errno == ENOENT) {
Chris@98:         return ProcessNotRunning;
Chris@98:     } else {
Chris@98:         perror("stat failed");
Chris@98:         return UnknownProcessStatus;
Chris@98:     }
Chris@98: 
Chris@98: #endif
Chris@98: }
Chris@98: