lookup.subproj/getgrouplist.3

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  52 .Dd June 9, 1993
  53 .Dt GETGROUPLIST 3
  54 .Os
  55 .Sh NAME
  56 .Nm getgrouplist
  57 .Nd calculate partial group access list
  58 .Sh LIBRARY
  59 Standard system libraries.
  60 .Sh SYNOPSIS
  61 .In unistd.h
  62 .Ft int
  63 .Fn getgrouplist "const char *name" "int basegid" "int *groups" "int *ngroups"
  64 .\".Fn getgrouplist "const char *name" "gid_t basegid" "gid_t *groups" "int *ngroups"
  65 .Sh DESCRIPTION
  66 The
  67 .Fn getgrouplist
  68 function obtains information from
  69 .Xr opendirectoryd 8
  70 to construct the group access list for the user specified in
  71 .Fa name .
  72 The
  73 .Fa basegid
  74 is automatically included in the groups list.
  75 Typically this value is given as
  76 the default group number from the user's account record.
  77 .Pp
  78 The resulting group list is returned in the array pointed to by
  79 .Fa groups .
  80 The caller specifies the size of the
  81 .Fa groups
  82 array in the integer pointed to by
  83 .Fa ngroups ;
  84 the actual number of groups found is returned in
  85 .Fa ngroups .
  86 .Sh RETURN VALUES
  87 The
  88 .Fn getgrouplist
  89 function
  90 returns 0 on success.
  91 If the size of the group list is too small to
  92 hold all the user's groups,
  93 .Fn getgrouplist
  94 returns \-1 to indicate failure.
  95 In this case, the group array will be filled with as many groups as will fit.
  96 .Sh FILES
  97 .Bl -tag -width /etc/group -compact
  98 .It Pa /etc/group
  99 group membership list
 100 .El
 101 .Sh SEE ALSO
 102 .Xr setgroups 2 ,
 103 .Xr initgroups 3 ,
 104 .Xr opendirectoryd 8 .
 105 .Sh HISTORY
 106 The
 107 .Fn getgrouplist
 108 function first appeared in
 109 .Bx 4.4 .