LOGIN(1) DOMAIN/IX Reference Manual (SYS5) LOGIN(1)
NAME
login - sign on
USAGE
login [ name [ env-var ...
DESCRIPTION
Login may be invoked by you as a command, or by the system
when a connection is first established. If you invoke login
as a command, it must replace the initial command inter-
preter. To do this, type
# exec login
or
# exec login name
at a shell prompt.
Login prompts for a name if none was supplied and, if
appropriate, a password. The password is not echoed, so it
will not appear on the transcript.
After a successful log-in, the message-of-the-day, if any,
is printed and the user- and group-ID's are initialized.
The working directory and command interpreter (shell) are
then set as specified in /etc/passwd. If no shell is speci-
fied in your password file entry, then the default command
interpreter, /bin/sh, is used.
If you change the shell field in your /etc/passwd entry, you
must also run /etc/crpasswd to update the file
/etc/passwd.map. All other changes to /etc/passwd (i.e., of
home directory or password) must be made through the Regis-
try. Normally, access to /etc/passwd is restricted to root.
Login initializes the following environment variables:
HOME=your-login-directory
PATH=:/bin:/usr/bin
SHELL=last-field-of-passwd-entry
MAIL=/usr/mail/your-login-name
TZ=timezone-specification
The environment may be expanded or modified by supplying
additional arguments to login, either at execution time or
when your log-in name is requested. The arguments may take
either the form xxx or xxx=yyy. Arguments without an equal
sign are placed in the environment as the following, where n
is a number starting at zero and is incremented each time a
new variable name is required:
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LOGIN(1) DOMAIN/IX Reference Manual (SYS5) LOGIN(1)
Ln=xxx
Variables containing an equal sign (=) are placed into the
environment without modification. If they already appear in
the environment, then they replace the older value. There
are two exceptions. The variables PATH and SHELL cannot be
changed. This prevents people who log into restricted Shell
environments from spawning secondary Shells that are not
restricted. Login understands simple single-character quot-
ing conventions. Typing a backslash in front of a character
quotes it and allows the inclusion of such things as spaces
and tabs.
CAUTIONS
If you do not complete login successfully within a certain
period of time (e.g., one minute), you may be silently
disconnected.
FILES
/usr/spool/mail/your-name mailbox for user your-name
/etc/motd message-of-the-day
/etc/passwd password file
.profile log-in command file (Bourne
Shell)
DIAGNOSTICS
``Login incorrect'': User name or the password cannot be
matched.
``No shell,'' ``Cannot open password file,'' or ``no direc-
tory'': Consult system administrator.
RELATED INFORMATION
mail (1), sh (1), su (1), crpasswd (1M).
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