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Describe special case when gidsetlen == 0. 

NGROUPS -> NGROUPS_MAX.
This commit is contained in:
jtc 1994-04-15 22:44:06 +00:00
parent 293ba06c9d
commit 2f9562f951
1 changed files with 10 additions and 5 deletions
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15
lib/libc/sys/getgroups.2
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@ -30,7 +30,7 @@
.\" SUCH DAMAGE. .\" SUCH DAMAGE.
.\" .\"
.\" from: @(#)getgroups.2 6.7 (Berkeley) 3/10/91 .\" from: @(#)getgroups.2 6.7 (Berkeley) 3/10/91
.\" $Id: getgroups.2,v 1.5 1994/03/29 02:46:29 jtc Exp $ .\" $Id: getgroups.2,v 1.6 1994/04/15 22:44:06 jtc Exp $
.\" .\"
.Dd March 10, 1991 .Dd March 10, 1991
.Dt GETGROUPS 2 .Dt GETGROUPS 2
@ -46,7 +46,7 @@
.Fn getgroups "int gidsetlen" "gid_t *gidset" .Fn getgroups "int gidsetlen" "gid_t *gidset"
.Sh DESCRIPTION .Sh DESCRIPTION
.Fn Getgroups .Fn Getgroups
gets the current group access list of the user process gets the current group access list of the current user process
and stores it in the array and stores it in the array
.Fa gidset . .Fa gidset .
The parameter The parameter
@ -57,11 +57,16 @@ indicates the number of entries that may be placed in
returns the actual number of groups returned in returns the actual number of groups returned in
.Fa gidset . .Fa gidset .
No more than No more than
.Dv NGROUPS , .Dv NGROUPS_MAX
as defined in
.Aq Pa sys/param.h ,
will ever will ever
be returned. be returned.
If
.Fa gidsetlen
is 0,
.Fn getgroups
returns the number of groups without modifying the
.Fa gidset
array.
.Sh RETURN VALUES .Sh RETURN VALUES
A successful call returns the number of groups in the group set. A successful call returns the number of groups in the group set.
A value of -1 indicates that an error occurred, and the error A value of -1 indicates that an error occurred, and the error