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48 lines
1.6 KiB
TeX
48 lines
1.6 KiB
TeX
\section{\module{grp} ---
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The group database}
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\declaremodule{builtin}{grp}
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\platform{Unix}
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\modulesynopsis{The group database (\function{getgrnam()} and friends).}
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This module provides access to the \UNIX{} group database.
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It is available on all \UNIX{} versions.
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Group database entries are reported as 4-tuples containing the
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following items from the group database (see \code{<grp.h>}), in order:
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\begin{tableiii}{r|l|l}{textrm}{Index}{Field}{Meaning}
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\lineiii{0}{gr_name}{the name of the group}
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\lineiii{1}{gr_passwd}{the (encrypted) group password; often empty}
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\lineiii{2}{gr_gid}{the numerical group ID}
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\lineiii{3}{gr_mem}{all the group member's user names}
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\end{tableiii}
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The gid is an integer, name and password are strings, and the member
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list is a list of strings.
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(Note that most users are not explicitly listed as members of the
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group they are in according to the password database. Check both
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databases to get complete membership information.)
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It defines the following items:
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\begin{funcdesc}{getgrgid}{gid}
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Return the group database entry for the given numeric group ID.
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\exception{KeyError} is raised if the entry asked for cannot be found.
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\end{funcdesc}
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\begin{funcdesc}{getgrnam}{name}
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Return the group database entry for the given group name.
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\exception{KeyError} is raised if the entry asked for cannot be found.
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\end{funcdesc}
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\begin{funcdesc}{getgrall}{}
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Return a list of all available group entries, in arbitrary order.
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\end{funcdesc}
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\begin{seealso}
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\seemodule{pwd}{An interface to the user database, similar to this.}
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\end{seealso}
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