process_signal.cc

Go to the documentation of this file.

//
// Copyright (c) 2019 Juniper Networks, Inc. All rights reserved.
//
 
#include <sys/wait.h>
#include <boost/system/error_code.hpp>
 
#include <io/process_signal.h>
 
namespace process {
 
boost::system::error_code Signal::InitializeSigChild() {
    boost::system::error_code ec;
 
    if (!sigchld_callbacks_.empty() || always_handle_sigchild_) {
        ec = AddSignal(SIGCHLD);
    }
 
    return ec;
}
 
void Signal::RegisterHandler(SignalChildHandler handler) {
    if (sigchld_callbacks_.empty()) {
        // Add signal first
        AddSignal(SIGCHLD);
    }
    sigchld_callbacks_.push_back(handler);
}
 
bool Signal::HandleSigOsSpecific(const boost::system::error_code& error,
                                 int sig) {
    if (sig != SIGCHLD) {
        return false;
    }
 
    int status = 0;
    pid_t pid = 0;
 
    while ((pid = WaitPid(-1, &status, WNOHANG)) > 0) {
        NotifySigChld(error, sig, pid, status);
    }
 
    return true;
}
 
} // namespace process