53 lines
1.1 KiB
Groff
53 lines
1.1 KiB
Groff
.TH GETTY 8
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.SH NAME
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getty \- system login banner
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.SH SYNOPSIS
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.B getty
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.RI [ banner " ...]"
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.SH DESCRIPTION
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.B Getty
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displays a system identification banner, reads a user name from standard
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input and executes
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.B login
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with that name as argument.
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.PP
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.B Getty
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uses its arguments separated by spaces as a login banner. The character
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sequences
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.BR \en ,
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.BR \es
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and
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.BR \et
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are printed as newline, space and tab. Any other
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.BI \e x
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prints that
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.IR x .
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The character sequences
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.BR %s ,
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.BR %n ,
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etc. produce the same output as
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.BR "uname \-s" ,
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.BR "uname \-n" ,
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etc. The default banner is
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.PP
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.RS
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%s\es\esRelease\es%r\esVersion\es%v\en\en%n\eslogin:\es
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.RE
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.PP
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The only other useful functionality offered by
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.B getty
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is that it can be suspended by signal SIGUSR1 and restarted by SIGUSR2.
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This allows a program such as
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.BR modem (1)
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to temporarily claim a dialin line for dialout.
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.SH "SEE ALSO"
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.BR modem (1),
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.BR ttytab (5),
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.BR init (8).
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.SH BUGS
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.B Getty
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should be taught about modems and modem lines. The signal trick is an awful
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hack.
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.SH AUTHOR
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Kees J. Bot (kjb@cs.vu.nl)
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