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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,12 @@ | ||
require "spec" | ||
require "system" | ||
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describe System do | ||
describe "hostname" do | ||
it "returns current hostname" do | ||
shell_hostname = `hostname`.strip | ||
hostname = System.hostname | ||
hostname.should eq(shell_hostname) | ||
end | ||
end | ||
end |
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Original file line number | Diff line number | Diff line change |
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|
@@ -57,3 +57,4 @@ require "mutex" | |
require "kernel" | ||
require "main" | ||
require "ext" | ||
require "system" |
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require "c/sys/socket" | ||
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module System | ||
# Returns the hostname | ||
# | ||
# Maximum of 253 characters are allowed, with 2 bytes reserved for storage. | ||
# In practice, many platforms will disallow anything longer than 63 characters. | ||
# ``` | ||
# System.hostname # => "host.example.org" | ||
# ``` | ||
def self.hostname | ||
String.new(255) do |buffer| | ||
unless LibC.gethostname(buffer, LibC::SizeT.new(255)) == 0 | ||
raise Errno.new("Could not get hostname") | ||
end | ||
len = LibC.strlen(buffer) | ||
{len, len} | ||
end | ||
end | ||
end |