class Etc::Passwd

Passwd is a placeholder Struct for user database on Unix systems.

name: contains the short login name of the user as a String.
passwd: contains the encrypted password of the user as a String. an 'x' is returned if shadow passwords are in use. An '*' is returned if the user cannot log in using a password.
uid: contains the integer user ID (uid) of the user.
gid: contains the integer group ID (gid) of the user’s primary group.
dir: contains the path to the home directory of the user as a String.
shell: contains the path to the login shell of the user as a String.

gecos: contains a longer String description of the user, such as a full name. Some Unix systems provide structured information in the gecos field, but this is system-dependent.
change: password change time(integer).
quota: quota value(integer).
age: password age(integer).
class: user access class(string).
comment: comment(string).
expire: account expiration time(integer).

Source

static VALUE
etc_each_passwd(VALUE obj)
{
#ifdef HAVE_GETPWENT
    RETURN_ENUMERATOR(obj, 0, 0);
    each_passwd();
#endif
    return obj;
}

Iterates for each entry in the /etc/passwd file if a block is given.

If no block is given, returns the Enumerator.

The code block is passed an Passwd struct.

See Etc.getpwent above for details.

Example:

require 'etc'

Etc::Passwd.each {|u|
  puts u.name + " = " + u.gecos
}

Etc::Passwd.collect {|u| u.gecos}
Etc::Passwd.collect {|u| u.gecos}