git: d23893ca4dd0 - stable/13 - groupmember(9): Detail which groups are considered, simplify

The branch stable/13 has been updated by olce:

URL: https://cgit.FreeBSD.org/src/commit/?id=d23893ca4dd00425814e23c87382ac20d8b0542a

commit d23893ca4dd00425814e23c87382ac20d8b0542a
Author:     Olivier Certner <olce.freebsd@certner.fr>
AuthorDate: 2023-08-17 23:54:41 +0000
Commit:     Olivier Certner <olce@FreeBSD.org>
CommitDate: 2023-12-21 13:36:55 +0000

    groupmember(9): Detail which groups are considered, simplify
    
    Reviewed by:            mhorne
    Sponsored by:           Kumacom SAS
    Differential Revision:  https://reviews.freebsd.org/D40634
    
    (cherry picked from commit 75a45ca3b34062fe793ae326ad9da614a1a06df1)
    
    Approved by:    markj (mentor)
---
 share/man/man9/groupmember.9 | 36 +++++++++++++++++++++---------------
 1 file changed, 21 insertions(+), 15 deletions(-)

diff --git a/share/man/man9/groupmember.9 b/share/man/man9/groupmember.9
index d447bf64c482..3a516622efce 100644
--- a/share/man/man9/groupmember.9
+++ b/share/man/man9/groupmember.9
@@ -1,5 +1,6 @@
 .\"
 .\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved.
+.\" Copyright (C) 2023 Olivier Certner <olce.freebsd@certner.fr>
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, are permitted provided that the following conditions
@@ -24,12 +25,12 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 .\" DAMAGE.
 .\"
-.Dd July 9, 2001
+.Dd August 18, 2023
 .Dt GROUPMEMBER 9
 .Os
 .Sh NAME
 .Nm groupmember
-.Nd checks group set for a group ID
+.Nd checks if credentials mandate some group membership
 .Sh SYNOPSIS
 .In sys/param.h
 .In sys/ucred.h
@@ -38,21 +39,26 @@
 .Sh DESCRIPTION
 The
 .Fn groupmember
-function checks to see if the given
-.Fa gid
-is in the group set of the credentials.
+function checks if credentials
+.Fa cred
+indicate that the associated subject or object is a member of the group
+designated by the group ID
+.Fa gid .
 .Pp
-Its arguments are:
-.Bl -tag -width ".Fa cred"
-.It Fa gid
-The group ID to check for.
-.It Fa cred
-The credentials to search for the group in.
-.El
+Considered groups in
+.Fa cred
+are the effective and supplementary groups.
+The real group is not taken into account.
 .Sh RETURN VALUES
 If the
 .Fa gid
-is found, 1 is returned; otherwise, 0 is returned.
+is found, 1 is returned, otherwise 0.
+.Sh SEE ALSO
+.Xr getgroups 2
+.Xr setgroups 2
 .Sh AUTHORS
-This manual page was written by
-.An Chad David Aq Mt davidc@acns.ab.ca .
+This manual page was initially written by
+.An -nosplit
+.An Chad David Aq Mt davidc@acns.ab.ca
+and was revised by
+.An Olivier Certner Aq Mt olce.freebsd@certner.fr .