Fix GitHub lint: discard Munmap’s error explicitly in data_read (#589)

Summary: Pull Request resolved: https://github.com/facebook/time/pull/589

facebook/time’s GitHub lint job fails on the exported D124865748:

fbclock/data_read.go:122:19: Error return value of unix.Munmap is not checked (errcheck)

The deferred Munmap only drops a read-only mapping after the snapshot is copied, so there’s nothing to do with its error. This discards it explicitly, as shmem_notlinux.go’s deferred Munmaps do.

Internal lint doesn’t report it: arc lint, extra linters included, passes on the unchanged line.

Reviewed By: pmazzini

Differential Revision: D127204480

fbshipit-source-id: f7a1e519e15c5e37192ef24f442d3ce67add57c1

Time

Documentation
License

Documentation

Collection of Meta’s Time Libraries such as NTP and PTP

cmd

All executables provided by this repo.

NTP

NTP-specific libraries, including protocol implementation.

PTP

PTP-specific libraries, including protocol implementation.

Leaphash

Utility package for computing the hash value of the official leap-second.list document

leapsectz

Utility package for obtaining leap second information from the system timezone database

PHC

Library to work with PTP Hardware Clock (PHC).

Timestamp

Library to work with NIC hardware/software timestamps.

oscillatord

Implementation of monitoring protocol used by Orolia oscillatord.

Calnex

Command line tool and library for a Calnex Sentinel device.

Caliper

Command line tool for parsing Luciol OTDR trace files when measuring system/cable latencies of Huber-Suhner GNSS-over-fiber systems

sa53

Command line tool and library for the Microchip SA53 atomic clock on Celestica time cards.

fbclock

Client C library and Go daemon to provide TrueTime API based on PTP time.

servo

Pi servo library

clock

Wrapper around CLOCK_ADJTIME syscall

NTRIP

NTRIP v1 SOURCE client library for pushing RTCM correction data to an NTRIP caster. Supports HTTP CONNECT proxy with TLS client certificate authentication.

ntripper

Command line tool that reads RTCM3 and UBX-RXM-RAWX data from an oscillatord Unix socket and pushes RTCM corrections to an NTRIP caster, generating MSM7 messages from raw observations when available.

RTCM

Parser and scanner for RTCM 10403.x (RTCM3) binary frames used for GNSS correction data. Includes CRC-24Q validation and stream synchronization.

License

time is licensed under Apache 2.0 as found in the LICENSE file.