中标麒麟使用中，有时候需要获取硬盘大小，防止在使用电脑过程中硬盘空间不足而不自知。

下面提供一个函数获取所有分区的信息：

1 struct DiskInfo{
2     float fUsed;
3     float fRemaining;
4 };

 

 1 //磁盘剩余空间 20201122 sdl
 2 double GetDiskRemainingSize(QList<DiskInfo>& listDiskInfo)
 3 {
 4     double pUsed;//已用空间
 5     double pSurplus = -1;//剩余空间
 6     float fUsed;//已经使用
 7     float fRemaining;//剩余
 8     QProcess process;
 9     process.start("df -k");
10     process.waitForFinished();
11     process.readLine();
12     while(!process.atEnd()){
13         QString str = process.readLine();//查询/dev/root空间
14         if(str.startsWith("/dev/root")){//"/dev/root"
15             str.replace("\n","");
16             str.replace(QRegExp("( ){1,}")," ");
17             QStringList lst = str.split(" ");
18             if(lst.size() > 5){
19                 fUsed = lst[2].toFloat() / 1024;
20                 fRemaining = lst[3].toFloat() / 1024;
21                 QString str = QString("dev/root:be used-%1,remaining-%2").arg(fUsed).arg(fRemaining);
22                 LOG(DEBUG) << str;
23                 DiskInfo diskInfo;
24                 diskInfo.fUsed = fUsed;
25                 diskInfo.fRemaining = fRemaining;
26                 listDiskInfo.push_back(diskInfo);
27             }
28         }
29         if(str.startsWith("/dev/sd")){
30             str.replace("\n","");
31             str.replace(QRegExp("( ){1,}")," ");
32             QStringList lst = str.split(" ");
33             if(lst.size() > 5){
34                 fUsed = lst[2].toFloat() / 1024;
35                 fRemaining = lst[3].toFloat() / 1024;
36                 QString str = QString("dev/root:be used-%1,remaining-%2").arg(fUsed).arg(fRemaining);
37                 LOG(DEBUG) << str;
38                 DiskInfo diskInfo;
39                 diskInfo.fUsed = fUsed;
40                 diskInfo.fRemaining = fRemaining;
41                 listDiskInfo.push_back(diskInfo);
42             }
43         }
44     }
45     return pSurplus;
46 }

另外，提供两个示例程序参考：

https://files-cdn.cnblogs.com/files/warmlight/demo1%E7%B1%BB%E4%BC%BC%E4%BA%8EDiskSize.zip

 

https://files-cdn.cnblogs.com/files/warmlight/DiskSize.rar