blob: ae1e41914b8fd13d402aa354a85271b0c236012f [file] [log] [blame]
#include <stdexcept>
#include <cstddef>
#include <cstring>
#include <string>
#include <sys/inotify.h>
#include <unistd.h>
#include <phosphor-logging/log.hpp>
#include "config.h"
#include "watch.hpp"
#include "image_manager.hpp"
namespace phosphor
{
namespace software
{
namespace manager
{
using namespace phosphor::logging;
using namespace std::string_literals;
Watch::Watch(sd_event* loop)
{
fd = inotify_init1(IN_NONBLOCK);
if (-1 == fd)
{
// Store a copy of errno, because the string creation below will
// invalidate errno due to one more system calls.
auto error = errno;
throw std::runtime_error(
"inotify_init1 failed, errno="s + std::strerror(error));
}
wd = inotify_add_watch(fd, IMG_UPLOAD_DIR, IN_CLOSE_WRITE);
if (-1 == wd)
{
auto error = errno;
close(fd);
throw std::runtime_error(
"inotify_add_watch failed, errno="s + std::strerror(error));
}
auto rc = sd_event_add_io(loop,
nullptr,
fd,
EPOLLIN,
callback,
this);
if (0 > rc)
{
throw std::runtime_error(
"failed to add to event loop, rc="s + std::strerror(-rc));
}
}
Watch::~Watch()
{
if ((-1 != fd) && (-1 != wd))
{
inotify_rm_watch(fd, wd);
close(fd);
}
}
int Watch::callback(sd_event_source* s,
int fd,
uint32_t revents,
void* userdata)
{
if (!(revents & EPOLLIN))
{
return 0;
}
constexpr auto maxBytes = 1024;
uint8_t buffer[maxBytes];
auto bytes = read(fd, buffer, maxBytes);
if (0 > bytes)
{
auto error = errno;
throw std::runtime_error(
"failed to read inotify event, errno="s + std::strerror(error));
}
auto offset = 0;
while (offset < bytes)
{
auto event = reinterpret_cast<inotify_event*>(&buffer[offset]);
if ((event->mask & IN_CLOSE_WRITE) && !(event->mask & IN_ISDIR))
{
auto rc = processImage(std::string{IMG_UPLOAD_DIR} +
'/' + event->name);
if (rc < 0)
{
log<level::ERR>("Error processing image",
entry("IMAGE=%s", std::string{event->name}));
}
}
offset += offsetof(inotify_event, name) + event->len;
}
return 0;
}
} // namespace manager
} // namespace software
} // namespace phosphor