Linux环境下C++只允许单个程序运行

来源：互联网发布：ubuntu设置图形界面编辑：程序博客网时间：2024/04/29 23:32

本程序在Ubuntu和Centos系统下能够正常使用！

具体实现的代码：

bool isSingleProcess (){    long pid;    char full_name[1024] = {0};    char proc_name[1024] = {0};    int fd;    pid = getpid();    cout << "pid = " << pid;    sprintf(full_name, "/proc/%ld/cmdline", pid);    if (access(full_name, F_OK) == 0)    {        fd = open (full_name, O_RDONLY);        if (fd == -1)            return false;        read (fd, proc_name, 1024);        close (fd);    }    else        return false;    char self_proc_name[512] = {0};    char * p = proc_name;    int pt = 0;    while (*p != ' ' && *p != '\0')    {        self_proc_name[pt] = *p;        p++;        pt++;    }    string self_final_name = basename(self_proc_name);    cout << "self_final_name = " << self_final_name << endl << flush;    DIR *dir;    struct dirent * result;    dir = opendir ("/proc");    while ((result = readdir (dir)) != NULL)    {        if (! strcmp(result->d_name, ".") || ! strcmp (result->d_name, "..") || ! strcmp (result->d_name, "thread-self")                || ! strcmp (result->d_name, "self") || atol (result->d_name) == pid)            continue;        memset(full_name, 0, sizeof(full_name));        memset(proc_name, 0, sizeof(proc_name));        sprintf(full_name, "/proc/%s/cmdline", result->d_name);        if (access(full_name, F_OK) == 0)        {            fd = open (full_name, O_RDONLY);            if (fd == -1)                continue;            read (fd, proc_name, 1024);            close (fd);            char *q = proc_name;            pt = 0;            memset(self_proc_name, 0, sizeof (self_proc_name));            while (*q != ' ' && *q != '\0')            {                self_proc_name[pt] = *q;                q++;                pt++;            }            string other_final_name = basename(self_proc_name);            if (self_final_name == other_final_name)            {                cout << "full_name = " << full_name << endl << flush;                cout << "other_final_name: " << other_final_name << endl;                return true;            }        }    }    return false;}

在main函数中的开始添加以下内容：

int main (int argc, char ** argv){//     judge single    if (isSingleProcess())    {        cout << "process is running in another place" << endl << flush;        return 0;    }    ......    return 0;}

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