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udev: Log errno for udev ERROR messages (#6186)

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Co-Authored-By: Ryan Wilson <ryantimwilson@fb.com>
This commit is contained in:
Teddy Reed 2020-02-29 00:24:50 -05:00 committed by GitHub
parent 6a6d08a247
commit 036ef013fb
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 8 deletions
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17
osquery/events/linux/udev.cpp
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@ -29,7 +29,7 @@ Status UdevEventPublisher::setUp() {
// Create the udev object.
handle_ = udev_new();
if (handle_ == nullptr) {
return Status(1, "Could not create udev object.");
return Status::failure("Could not create udev object");
}
// Set up the udev monitor before scanning/polling.
@ -37,7 +37,7 @@ Status UdevEventPublisher::setUp() {
if (monitor_ == nullptr) {
udev_unref(handle_);
handle_ = nullptr;
return Status(1, "Could not create udev monitor.");
return Status::failure("Could not create udev monitor");
}
udev_monitor_enable_receiving(monitor_);
@ -61,11 +61,11 @@ Status UdevEventPublisher::run() {
{
WriteLock lock(mutex_);
if (monitor_ == nullptr) {
return Status(1);
return Status::failure("udev monitor not set up");
}
int fd = udev_monitor_get_fd(monitor_);
if (fd < 0) {
LOG(ERROR) << "Could not get udev monitor fd";
LOG(ERROR) << "Could not get udev monitor fd: " << std::strerror(-fd);
return Status::failure("udev monitor failed");
}
@ -75,8 +75,8 @@ Status UdevEventPublisher::run() {
int selector = ::poll(fds, 1, 1000);
if (selector == -1 && errno != EINTR && errno != EAGAIN) {
LOG(ERROR) << "Could not read udev monitor";
return Status(1, "udev monitor failed.");
LOG(ERROR) << "Could not read udev monitor: " << std::strerror(errno);
return Status::failure("udev monitor failed");
}
if (selector == 0 || !(fds[0].revents & POLLIN)) {
@ -86,8 +86,9 @@ Status UdevEventPublisher::run() {
struct udev_device* device = udev_monitor_receive_device(monitor_);
if (device == nullptr) {
LOG(ERROR) << "udev monitor returned invalid device";
return Status(1, "udev monitor failed.");
LOG(ERROR) << "udev monitor returned invalid device: "
<< std::strerror(errno);
return Status::failure("udev monitor failed");
}
auto ec = createEventContextFrom(device);