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Implemenation of 'ex' API - portable os and io extension functions
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Latest commit 6924c51 @drahosp drahosp Updated travis hook


"ex" API implementation
Copyright 2007 Mark Edgar < medgar at gmail com >

-- Environment
os.getenv(name) -- get environment variable
os.setenv(name, value) -- set/unset environment variable
os.environ() -- returns a copy of the environment

-- File system
cwd = os.currentdir()

for entry in os.dir(pathname) do ; end
entry = os.dirent(pathname)
  entry is a table, containing at least the following keys:
  name: the filename
  type: "file" or "directory" or another implementation-defined string
  size: the file size in bytes

-- Locking and pipes
file ="filename", "w")
file:lock(mode, start, length) -- mode is "r" or "w", start and length are optional
file:unlock(start, length) -- start and length are optional
in, out = io.pipe()

-- Process control
os.sleep(seconds) -- sleep for (floating-point) seconds
os.sleep(interval, unit) -- sleep for interval/unit seconds
pid = os.spawn(filename, {args={}, env={}, stdin=file, stdout=file, stderr=file})
exitcode = pid:wait(pid)
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