ref: 78b9c2b9f2dcc79a3d5dbfadfdea8c3e8cb1fa22
dir: /sys/man/6/users/
.TH USERS 6 .SH NAME users \- file server user list format .SH DESCRIPTION The permanent file servers each maintain a private list of users and groups, in .B /adm/users by convention. Each line in the file has the format .IP .IB id : name : leader :\fImembers\fP .PP where .I name and .I leader are printable strings excluding the characters .LR ? , .LR = , .LR + , .LR - , .LR / , and .LR : , and .I members is a comma-separated list of such strings. Such a line defines a user and a group with the given .IR name ; the group has a group leader given by .I leader and group members given by the user names in .IR members . The .I leader field may be empty, in which case any group member is a group leader. The .I members field may be empty. .PP Lines beginning with .L # are ignored. .PP The .I id in a line is an identifier used in the on-disk structures maintained by a file server; there should be no duplicate .IR id s in the file. In older Plan 9 file servers, .IR id s are small decimal numbers. In those, a negative .I id is special: a user with a negative .I id cannot attach to the file server. The file .B /adm/users itself is owned by user .I adm and write protected to others, so it can only be changed via console commands. .SH "SEE ALSO" .IR intro (5), .IR stat (5),