groups.1

<B>Digital的Unix操作系统VAX 4.2源码</B>

.\" SCCSID: @(#)groups.1	8.1	9/11/90
.TH groups 1
.SH Name
groups \- show group memberships
.SH Syntax
\fBgroups [\|\fIuser\fR\|]
.SH Description
.NXR "groups command"
.NXR "group" "displaying memberships"
.NXAM "setgroups system call" "groups command"
The
.PN groups
command shows the groups to which the specified
\fIuser\fP belongs determined by reading 
.PN /etc/group .
These are the groups that will be in effect the next time the
\fIusr\fP logs in.
If the
.PN groups
command is used without the \fIusr\fP argument, it will report
the groups currently in effect using the 
.MS getgroups 2
system call. If the 
.PN /etc/group 
file was changed after the login, this may not be the same.
.PP
Each user belongs to a group specified in the password file 
.PN /etc/passwd
and possibly to other groups as specified in the file 
.PN /etc/group .
If you do not own a file but you do belong to the group by 
which it is owned, you are granted group access to the file.
.PP
When a new file is created it is given
the group specifications of the directory in which it resides.
.SH Files
.PN /etc/passwd
.br
.PN /etc/group
.SH See Also
setgroups(2)