login.conf(5)
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LOGIN.CONF(5) NetBSD Programmer's Manual LOGIN.CONF(5)
NAME
login.conf - login class capability data base
SYNOPSIS
login.conf
DESCRIPTION
The login.conf file describes the various attributes of login classes. A
login class determines what styles of authentication are available as
well as session resource limits and environment setup. While designed
primarily for the login(1) program, it is also used by other programs,
e.g., rexecd(8), which need to set up a user environment.
CAPABILITIES
Refer to getcap(3) for a description of the file layout. All entries in
the login.conf file are either boolean or use a `=' to separate the capa-
bility from the value. The types are described after the capability
table.
Name Type Default Description
copyright file File containing additional
copyright information.
coredumpsize size Maximum coredump size limit.
cputime time CPU usage limit.
datasize size Maximum data size limit.
filesize size Maximum file size limit.
hushlogin bool false Same as having a
$HOME/.hushlogin file. See
login(8).
ignorenologin bool false Not affected by nologin
files.
login-retries number 10 Maximum number of login at-
tempts allowed.
login-backoff number 3 Number of login attempts af-
ter which to start random
back-off.
maxproc number Maximum number of process.
memorylocked size Maximum locked in core memory
size limit.
memoryuse size Maximum in core memoryuse
size limit.
minpasswordlen number The minimum length a local
password may be. Used by the
passwd(1) utility.
nologin file If the file exists it will be
displayed and the login ses-
sion will be terminated.
openfiles number Maximum number of open files
per process.
passwordtime time Used by passwd(1) to set next
password expiry date.
password-warn time 2w If the user's password will
expire within this length of
time then warn the user of
this.
path path /bin /usr/bin
Default search path.
priority number Initial priority (nice) lev-
el.
requirehome bool false Require home directory to lo-
gin.
setenv list Comma separated list of envi-
ronment variables and values
to be set.
shell program Session shell to execute
rather than the shell speci-
fied in the password file.
The SHELL environment vari-
able will contain the shell
specified in the password
file.
stacksize size Maximum stack size limit.
term string su Default terminal type if not
able to determine from other
means.
umask number 022 Initial umask. Should always
have a leading 0 to assure
octal interpretation. See
umask(2).
welcome file /etc/motd File containing welcome mes-
sage.
The resource limit entries (cputime, filesize, datasize, memoryuse,
memorylocked, maxproc, and openfiles) actually specify both the maximum
and current limits (see getrlimit(2)). The current limit is the one nor-
mally used, although the user is permitted to increase the current limit
to the maximum limit. The maximum and current limits may be specified
individually by appending a -max or -cur to the capability name (e.g.,
openfiles-max and openfiles-cur).
NetBSD will never define capabilities which start with x- or X-, these
are reserved for external use (unless included through contributed soft-
ware).
The argument types are defined as:
file Path name to a text file.
list A comma separated list of values.
number A number. A leading 0x implies the number is expressed in
hexadecimal. A leading 0 implies the number is expressed in
octal. Any other number is treated as decimal.
path A space separated list of path names. If a ~ is the first
character in the path name, the ~ is expanded to the user's
home directory.
program A path name to program.
size A number which expresses a size in bytes. It may have a
trailing b to multiply the value by 512, a k to multiply the
value by 1 K (1024), and a m to multiply the value by 1 M
(1048576).
time A time in seconds. A time may be expressed as a series of
numbers which are added together. Each number may have a
trailing character to represent time units:
y Indicates a number of 365 day years.
w Indicates a number of 7 day weeks.
d Indicates a number of 24 hour days.
h Indicates a number of 60 minute hours.
m Indicates a number of 60 second minutes.
s Indicates a number of seconds.
For example, to indicate 1 and 1/2 hours, the following string
could be used: 1h30m.
The class to be used is normally determined by the class field in the
password file (see passwd(5)).
The class is used to look up a corresponding entry in the login.conf
file.
FILES
/etc/login.conf login class capability database
/etc/login.conf.db hashed database built with cap_mkdb(1)
SEE ALSO
getcap(3), login_cap(3), ttys(5), cap_mkdb(1), ftpd(8), login(1)
HISTORY
The login.conf configuration file appeared in NetBSD 1.5.
NetBSD 1.5 January 14, 2000 3
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