掛載路徑自己修改即可:

U盤掛載部分:

#include "checkudisk.h"checkUdisk::checkUdisk(QObject *parent): QObject(parent) {check = new usbCheck();thread = new QThread();connect(thread, SIGNAL(started()),check,SLOT(checking()));connect(thread, SIGNAL(finished()),check, SLOT(deleteLater()));connect(check,SIGNAL(usbName(QStringList,int)),this,SLOT(getName(QStringList,int)));check->moveToThread(thread);}void checkUdisk::started() {int pos=0;bool fdiskU,dfU;QString cmd,path;QDir dir;QString checkResult;//fdisk -l 檢查/dev下是否識別U盤/sd[a-z][0-9]{1,2}runCmd checkU;QString fidsk = "fdisk";QStringList fdisk_list;fdisk_list<<"-l";checkU.setCmd(fidsk,fdisk_list);checkResult = checkU.getString();fdisk_list.clear();QRegExp rx("sd[a-z][0-9]{1,2}");while( (pos = rx.indexIn(checkResult,pos)) != -1 ){fdisk_list<<rx.cap(0);pos += rx.matchedLength();}//檢測到的 sd* 存于fdisk_list列表if(fdisk_list.length() == 0)fdiskU = false;elsefdiskU = true;//df -h 檢查對應的U盤是否掛載;checkResult.clear();runCmd chechDf;QString df = "df";QStringList df_list;df_list<<"-h";chechDf.setCmd(df,df_list);checkResult = chechDf.getString();df_list.clear();QRegExp rz("/dev/sd[a-z][0-9]{1,2}");pos = 0;while( (pos = rz.indexIn(checkResult,pos)) != -1 ){df_list<<rz.cap(0);pos += rz.matchedLength();}if(df_list.length() == 0)dfU = false;elsedfU = true;if(fdiskU == true){if(dfU == false){for(int i=0; i<fdisk_list.length();i++){path = QString("/mnt/%1").arg(fdisk_list.at(i));dir.mkdir(path);cmd = QString("mount /dev/%1 /mnt/%1").arg(fdisk_list.at(i));system(cmd.toStdString().c_str());}}}thread->start(); }checkUdisk::~checkUdisk() {disconnect(thread, SIGNAL(started()),check,SLOT(checking()));disconnect(thread, SIGNAL(finished()),check, SLOT(deleteLater()));if(thread){if(thread->isRunning()){thread->quit();thread->wait();}delete thread;thread = NULL;}if(check){delete check;check = NULL;} }void checkUdisk::getName(QStringList strList,int statue) {QString cmd,path;QDir dir;if(strList.length() == 0)return;if(statue == 0){for(int i=0; i<strList.length();i++){path = QString("/mnt/%1").arg(strList.at(i));cmd = QString("umount /mnt/%1").arg(strList.at(i));system(cmd.toStdString().c_str());dir.rmdir(path);}}else if(statue == 1){for(int i=0; i<strList.length();i++){path = QString("/mnt/%1").arg(strList.at(i));dir.mkdir(path);usbPathList<<path;cmd = QString("mount /dev/%1 /mnt/%1").arg(strList.at(i));system(cmd.toStdString().c_str());}}else{for(int i=0; i<usbPathList.length();i++){dir.rmdir(usbPathList.at(i));}}//qDebug()<<cmd; } #ifndef CHECKUDISK_H #define CHECKUDISK_H#include <QThread> #include <QStringList> #include <QString> #include <QFile> #include <QFileInfo> #include <QDir> #include "usbcheck.h" #include "runCmd.h"class usbCheck; class runCmd; class checkUdisk : public QObject {Q_OBJECT public:explicit checkUdisk(QObject *parent = 0);bool checking();void started();~checkUdisk();public slots:void getName(QStringList,int statue); private:QThread *thread;usbCheck *check;QStringList usbPathList; };#endif // CHECKUDISK_H

運行部分:

#include "runCmd.h"runCmd::runCmd(QObject *parent) : QObject(parent) {process = new QProcess(this);connect(process, SIGNAL(readyRead()),this,SLOT(readyRead())); }runCmd::~runCmd() {delete process; }QString runCmd::getString() {while(false == process->waitForFinished());return putout; }void runCmd::setCmd(QString str,QStringList strList) {if(strList.length()==0){process->start(str);}else{process->start(str,strList);} }void runCmd::readyRead() {putout = process->readAll(); }

.h

#ifndef RUNCMD_H #define RUNCMD_H#include <QProcess> #include <QDebug>#include <QObject>class runCmd : public QObject {Q_OBJECT public:explicit runCmd(QObject *parent = 0);~runCmd();void setCmd(QString,QStringList);QString getString(); signals:public slots:void readyRead();private:QProcess *process;QString putout; };#endif // RUNCMD_H

檢測usb代碼:

#include "usbcheck.h"usbCheck::usbCheck(QObject *parent) : QObject(parent) {sockfd = socket(AF_NETLINK, SOCK_RAW, NETLINK_KOBJECT_UEVENT);memset(&client,0,sizeof(client));client.nl_family = AF_NETLINK;client.nl_pid = getpid();client.nl_groups = 1;buffersize = 1024;setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF,&buffersize, sizeof(buffersize));// if(bind(sockfd, (struct sockaddr *)&client,sizeof(client))) // qDebug()<<"bind error:"<<strerror(errno);bind(sockfd, (struct sockaddr *)&client,sizeof(client));}void usbCheck::checking() {for(;;){char buf[UEVENT_BUFFER_SIZE] = {0};FD_ZERO(&fds);FD_SET(sockfd,&fds);tv.tv_sec = 0;tv.tv_usec = 100*1000;result = select(sockfd+1,&fds, NULL,NULL, &tv);if(result <0)continue;if(!(result>0 && FD_ISSET(sockfd,&fds)))continue;receiveLenth = recv(sockfd,&buf,sizeof(buf),0);if(receiveLenth >0){getName(buf);}} }// emit usbName(QString("sdb1"),1);//0 remove // emit usbName(str,1);//1 add //ID = str.mid(str.indexOf(new QRegExp("[0-9]{1,2}"))); void usbCheck::getName(QString buf) {QString statue = buf.split("@").at(0);QStringList resultList; // QRegExp rx("\/sd[a-z]{1}[0-9]{1,2}");QRegExp rx("sd[a-z]{1}[0-9]{1,2}");int pos = 0;while( (pos = rx.indexIn(QString(buf),pos)) != -1){resultList<<rx.cap(0);pos += rx.matchedLength();}if(statue == "remove"){emit usbName(resultList,0);}else if(statue == "add"){emit usbName(resultList,1);} } #ifndef USBCHECK_H #define USBCHECK_H#include <QObject>#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <fcntl.h> #include <errno.h> #include <sys/types.h>//#include <QDebug> #include <QString> #include <QStringList> #include <asm/types.h> #include <sys/socket.h> #include <linux/netlink.h>#include "head.h"#define UEVENT_BUFFER_SIZE 4096class usbCheck : public QObject {Q_OBJECT public:explicit usbCheck(QObject *parent = 0);signals:void usbName(QStringList ,int statue); public slots:void checking(); private:void getName(QString); private:int sockfd;struct sockaddr_nl client;struct timeval tv;struct msghdr msg;struct iovec iov;fd_set fds;int receiveLenth,i,result;int buffersize;};#endif // USBCHECK_H

公用頭:

#ifndef HEAD_H #define HEAD_H#include <QObject> #include <QString> //#include <QDebug> #include <QThread> #include "usbcheck.h" #include "checkudisk.h" #include "runCmd.h"#endif // HEAD_H

main:

#include <QCoreApplication> #include "head.h" #include "checkudisk.h"class checkUdisk;int main(int argc, char *argv[]) {QCoreApplication a(argc, argv);checkUdisk check;check.started();return a.exec(); }

?

代碼簡單久不解釋了,原理用的是socket檢測內核usb事件,匹配出來以后?手動掛載.

完整工程代碼:umount.zip

總結

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