kc3-lang/libbsd/man/pwcache.3bsd

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  man: Lowercase man page title While using fully uppercase man page titles has been the usual convention for a very long time, it is rather ugly and something that some other projects are switching away from.

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• man/pwcache.3bsd

• .\"	$OpenBSD: pwcache.3,v 1.15 2018/09/13 16:50:54 jmc Exp $
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  .Dd $Mdocdate: September 13 2018 $
  .Dt user_from_uid 3
  .Os
  .Sh NAME
  .Nm user_from_uid ,
  .Nm uid_from_user ,
  .Nm group_from_gid ,
  .Nm gid_from_group
  .Nd cache password and group entries
  .Sh LIBRARY
  .ds str-Lb-libbsd Utility functions from BSD systems (libbsd, \-lbsd)
  .ds doc-str-Lb-libbsd \*[str-Lb-libbsd]
  .Lb libbsd
  .Sh SYNOPSIS
  .In pwd.h
  (See
  .Xr libbsd 7
  for include usage.)
  .Ft int
  .Fn uid_from_user "const char *name" "uid_t *uid"
  .Ft const char *
  .Fn user_from_uid "uid_t uid" "int nouser"
  .In grp.h
  .Ft int
  .Fn gid_from_group "const char *name" "gid_t *gid"
  .Ft const char *
  .Fn group_from_gid "gid_t gid" "int nogroup"
  .Sh DESCRIPTION
  The
  .Fn user_from_uid
  function returns the user name associated with the argument
  .Fa uid .
  The user name is cached so that multiple calls with the same
  .Fa uid
  do not require additional calls to
  .Xr getpwuid 3 .
  If there is no user associated with the
  .Fa uid ,
  a pointer is returned
  to a string representation of the
  .Fa uid ,
  unless the argument
  .Fa nouser
  is non-zero, in which case a null pointer is returned.
  .Pp
  The
  .Fn uid_from_user
  function returns the user ID associated with the argument
  .Fa name .
  The user ID is cached so that multiple calls with the same
  .Fa name
  do not require additional calls to
  .Xr getpwnam 3 .
  If there is no user ID associated with the
  .Fa name ,
  the
  .Fn uid_from_user
  function returns -1;
  otherwise it stores the user ID at the location pointed to by
  .Fa uid
  and returns 0.
  .Pp
  The
  .Fn group_from_gid
  function returns the group name associated with the argument
  .Fa gid .
  The group name is cached so that multiple calls with the same
  .Fa gid
  do not require additional calls to
  .Xr getgrgid 3 .
  If there is no group associated with the
  .Fa gid ,
  a pointer is returned
  to a string representation of the
  .Fa gid ,
  unless the argument
  .Fa nogroup
  is non-zero, in which case a null pointer is returned.
  .Pp
  The
  .Fn gid_from_group
  function returns the group ID associated with the argument
  .Fa name .
  The group ID is cached so that multiple calls with the same
  .Fa name
  do not require additional calls to
  .Xr getgrnam 3 .
  If there is no group ID associated with the
  .Fa name ,
  the
  .Fn gid_from_group
  function returns -1;
  otherwise it stores the group ID at the location pointed to by
  .Fa gid
  and returns 0.
  .Sh SEE ALSO
  .Xr getgrgid 3 ,
  .Xr getpwuid 3
  .Sh HISTORY
  The
  .Fn user_from_uid
  and
  .Fn group_from_gid
  functions first appeared in
  .Bx 4.4 .
  .Pp
  The
  .Fn uid_from_user
  and
  .Fn gid_from_group
  functions were ported from
  .Nx
  and first appeared in
  .Ox 6.4 .
  

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