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Get the child of a process by its name in Linux
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| #include <algorithm> | |
| #include <vector> | |
| #include <iostream> | |
| #include <fstream> | |
| #include <proc/readproc.h> | |
| void ProcIdFromParentProcId(int parentProcId, std::vector<int>& procId) { | |
| PROCTAB *proc = openproc(PROC_FILLSTAT); | |
| while (proc_t *proc_info = readproc(proc, nullptr)) { | |
| if (proc_info->ppid == parentProcId) { | |
| procId.push_back(proc_info->tgid);// i++; | |
| } | |
| freeproc(proc_info); | |
| } | |
| } | |
| pid_t get_pid_by_name(std::string name){ | |
| char buf[512]; | |
| std::string command = "pidof -s " + name; | |
| FILE *cmd_pipe = popen(command.c_str(), "r"); | |
| fgets(buf, 512, cmd_pipe); | |
| pid_t pid = strtoul(buf, NULL, 10); | |
| pclose( cmd_pipe ); | |
| return pid; | |
| } | |
| std::string get_name_by_pid(pid_t pid){ | |
| char file_path[100]; | |
| sprintf(file_path, "/proc/%d/task/%d/comm", pid, pid); | |
| std::ifstream file(file_path); | |
| std::string proc_name; | |
| std::getline(file, proc_name); | |
| return proc_name; | |
| } | |
| int main(){ | |
| std::vector<int> procs; | |
| std::string process_name; | |
| std::cout<<"Enter the process name: "; | |
| std::cin>>process_name; | |
| //Get PID by name | |
| int pid_process = get_pid_by_name(process_name); | |
| std::cout<<"The PID of this process is: "<<pid_process<<"\n"; | |
| //Get child process by PID | |
| ProcIdFromParentProcId(pid_process, procs); | |
| std::cout<<"The child process are: "; | |
| for(int i = 0; i < procs.size(); i++){ | |
| pid_t pid = procs[i]; | |
| std::string proc_name = get_name_by_pid(pid); | |
| std::cout<<pid<<"("<<proc_name<<")\n"; | |
| } | |
| std::cout<<std::endl; | |
| return 0; | |
| } |
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