GetTgid returns the tgid for the given pid.

MyUserAndGroup returns the UID and GID of this process.

for testing.

NewFileHandle returns a new file handle for the given `inode` triggered by fuse operation with the given `opMetadata`.

PopulateFlags adds the flags accepted by run to the supplied flag set, returning the variables into which the flags will parse.

from https://stackoverflow.com/questions/22892120/how-to-generate-a-random-string-of-a-fixed-length-in-golang.

Sign requests with signature version 2.

GCS variant of S3.

Implementations of all the functions here are expected to be concurrency-safe, except for Init() is called exactly once before any other functions are called.