filegroup

  • This function’s solution assumes a Unix-like operating system.

    The filegroup function in PHP returns the group ID owning a file.

    PHP

    $gid = filegroup('/path/to/foobar');
print $gid;
 
//=> 501

    You can retrieve a file’s group ID in Ruby by calling File.stat. It will return a File::Stat instance that contains a gid attribute.

    Ruby

    stat = File.stat('/path/to/foobar')
p stat.gid
 
#=> 501

    Resolving the Group Name

    If you also need the name from the group ID, you can use PHP’s posix_getgrgid function to retrieve this information and more.

    PHP

    $gid = filegroup('/path/to/foobar');
$info = posix_getgrgid($gid);
print $info['name'];
 
//=> "herbert"

    The Etc module from the Ruby Standard Library provides a getgrgid method. It returns a Struct with attributes similar to the keys of the associative array returned by PHP’s posix_getgrgid.

    Ruby

    require 'etc'
 
gid = File.stat('/path/to/foobar').gid
info = Etc.getgrgid(gid)
p info.name
 
#=> "herbert"

    Comparing to the Current Process

    Ruby’s File class provides an additional method, grpowned?, that tests if the effective group ID of the current process is the group ID of a file.

    Ruby

    File.grpowned?('/path/to/foobar')
 
#=> true

    see also

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