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;
}