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Merge pull request #2182 from cptpcrd/fd-closing

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Alex 2023-05-22 07:40:14 +02:00 committed by GitHub
commit 2b24b16023
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2 changed files with 9 additions and 2 deletions
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9
include/util/command.hpp
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@ -4,6 +4,7 @@
#include <spdlog/spdlog.h>
#include <sys/wait.h>
#include <unistd.h>
#include <fcntl.h>
#ifdef __linux__
#include <sys/prctl.h>
@ -68,7 +69,11 @@ inline int close(FILE* fp, pid_t pid) {
inline FILE* open(const std::string& cmd, int& pid) {
if (cmd == "") return nullptr;
int fd[2];
if (pipe(fd) != 0) {
// Open the pipe with the close-on-exec flag set, so it will not be inherited
// by any other subprocesses launched by other threads (which could result in
// the pipe staying open after this child dies, causing us to hang when trying
// to read from it)
if (pipe2(fd, O_CLOEXEC) != 0) {
spdlog::error("Unable to pipe fd");
return nullptr;
}
@ -77,6 +82,8 @@ inline FILE* open(const std::string& cmd, int& pid) {
if (child_pid < 0) {
spdlog::error("Unable to exec cmd {}, error {}", cmd.c_str(), strerror(errno));
::close(fd[0]);
::close(fd[1]);
return nullptr;
}

2
src/modules/network.cpp
View File

@ -188,7 +188,7 @@ void waybar::modules::Network::createEventSocket() {
throw std::runtime_error("Can't create epoll");
}
{
ev_fd_ = eventfd(0, EFD_NONBLOCK);
ev_fd_ = eventfd(0, EFD_NONBLOCK|EFD_CLOEXEC);
struct epoll_event event;
memset(&event, 0, sizeof(event));
event.events = EPOLLIN | EPOLLET;