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66 lines
2.2 KiB
66 lines
2.2 KiB
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:mod:`grp` --- The group database
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=================================
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.. module:: grp
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:platform: Unix
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:synopsis: The group database (getgrnam() and friends).
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This module provides access to the Unix group database. It is available on all
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Unix versions.
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Group database entries are reported as a tuple-like object, whose attributes
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correspond to the members of the ``group`` structure (Attribute field below, see
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``<pwd.h>``):
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+-------+-----------+---------------------------------+
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| Index | Attribute | Meaning |
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+=======+===========+=================================+
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| 0 | gr_name | the name of the group |
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+-------+-----------+---------------------------------+
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| 1 | gr_passwd | the (encrypted) group password; |
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| | | often empty |
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+-------+-----------+---------------------------------+
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| 2 | gr_gid | the numerical group ID |
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+-------+-----------+---------------------------------+
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| 3 | gr_mem | all the group member's user |
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| | | names |
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+-------+-----------+---------------------------------+
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The gid is an integer, name and password are strings, and the member list is a
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list of strings. (Note that most users are not explicitly listed as members of
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the group they are in according to the password database. Check both databases
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to get complete membership information. Also note that a ``gr_name`` that
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starts with a ``+`` or ``-`` is likely to be a YP/NIS reference and may not be
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accessible via :func:`getgrnam` or :func:`getgrgid`.)
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It defines the following items:
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.. function:: getgrgid(gid)
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Return the group database entry for the given numeric group ID. :exc:`KeyError`
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is raised if the entry asked for cannot be found.
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.. function:: getgrnam(name)
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Return the group database entry for the given group name. :exc:`KeyError` is
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raised if the entry asked for cannot be found.
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.. function:: getgrall()
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Return a list of all available group entries, in arbitrary order.
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.. seealso::
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Module :mod:`pwd`
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An interface to the user database, similar to this.
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Module :mod:`spwd`
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An interface to the shadow password database, similar to this.
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