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use std::io;
/// Bump filehandle limit
pub fn bump_filehandle_limit() {
let mut limits = libc::rlimit {
rlim_cur: 0,
rlim_max: 0,
};
// SAFETY: `&mut limits` is a valid pointer parameter for the getrlimit syscall
let status = unsafe { libc::getrlimit(libc::RLIMIT_NOFILE, &mut limits) };
if status != 0 {
log::error!(
"Failed to get file handle limits: {}-{}",
io::Error::from_raw_os_error(status),
status
);
return;
}
const INCREASED_FILEHANDLE_LIMIT: u64 = 1024;
// if file handle limit is already big enough, there's no reason to decrease it.
if limits.rlim_cur >= INCREASED_FILEHANDLE_LIMIT {
return;
}
limits.rlim_cur = INCREASED_FILEHANDLE_LIMIT;
// SAFETY: `&limits` is a valid pointer parameter for the getrlimit syscall
let status = unsafe { libc::setrlimit(libc::RLIMIT_NOFILE, &limits) };
if status != 0 {
log::error!(
"Failed to set file handle limit to {}: {}-{}",
INCREASED_FILEHANDLE_LIMIT,
io::Error::from_raw_os_error(status),
status
);
}
}
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