- +(NSMutableArray *)runningProcesses
- {
- //指定名字参数,按照顺序第一个元素指定本请求定向到内核的哪个子系统,第二个及其后元素依次细化指定该系统的某个部分。
- //CTL_KERN,KERN_PROC,KERN_PROC_ALL 正在运行的所有进程
- int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL ,0};
- size_t miblen = 4;
- //值-结果参数:函数被调用时,size指向的值指定该缓冲区的大小;函数返回时,该值给出内核存放在该缓冲区中的数据量
- //如果这个缓冲不够大,函数就返回ENOMEM错误
- size_t size;
- //返回0,成功;返回-1,失败
- int st = sysctl(mib, miblen, NULL, &size, NULL, 0);
- struct kinfo_proc * process = NULL;
- struct kinfo_proc * newprocess = NULL;
- do
- {
- size += size / 10;
- newprocess = realloc(process, size);
- if (!newprocess)
- {
- if (process)
- {
- free(process);
- process = NULL;
- }
- return nil;
- }
- process = newprocess;
- st = sysctl(mib, miblen, process, &size, NULL, 0);
- }
- while (st == -1 && errno == ENOMEM);
- if (st == 0)
- {
- if (size % sizeof(struct kinfo_proc) == 0)
- {
- int nprocess = size / sizeof(struct kinfo_proc);
- if (nprocess)
- {
- NSMutableArray * array = [[NSMutableArray alloc] init];
- for (int i = nprocess - 1; i >= 0; i--)
- {
- NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
- NSString * processID = [[NSString alloc] initWithFormat:@"%d", process[i].kp_proc.p_pid];
- NSString * processName = [[NSString alloc] initWithFormat:@"%s", process[i].kp_proc.p_comm];
- NSString * proc_CPU = [[NSString alloc] initWithFormat:@"%d", process[i].kp_proc.p_pctcpu];
- //the process duration
- //double t = [[NSDate date] timeIntervalSince1970] - process[i].kp_proc.p_un.__p_starttime.tv_sec;
- NSString * proc_useTiem = [[NSString alloc] initWithFormat:@"%s",asctime(localtime(&(process[i].kp_proc.p_un.__p_starttime.tv_sec)))];
- NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];
- [dic setValue:processID forKey:@"ProcessID"];
- [dic setValue:processName forKey:@"ProcessName"];
- [dic setValue:proc_CPU forKey:@"ProcessCPU"];
- [dic setValue:proc_useTiem forKey:@"ProcessUseTime"];
- [processID release];
- [processName release];
- [proc_CPU release];
- [proc_useTiem release];
- [array addObject:dic];
- [dic release];
- [pool release];
- }
- free(process);
- process = NULL;
- return array;
- }
- }
- }
- return nil;
- }
- //该片段来自于http://www.codesnippet.cn/detail/290720134859.html
来源: http://www.codesnippet.cn/detail/290720134859.html