57 lines
1.1 KiB
Groff
57 lines
1.1 KiB
Groff
.TH TTYSLOT 3
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.SH NAME
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ttyslot, fttyslot \- utmp slot number
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.SH SYNOPSIS
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.nf
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.ft B
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#define _MINIX_SOURCE 1
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#include <unistd.h>
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int ttyslot(void)
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int fttyslot(int \fIfd\fP)
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.fi
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.ft P
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.SH DESCRIPTION
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.B Ttyslot()
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returns the index of the login terminal in the
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.B utmp
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file. It tries
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.B fttyslot()
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on file descriptors
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.BR 0,
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.BR 1,
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and
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.BR 2
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to find the index.
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.PP
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.B Fttyslot()
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returns the utmp index of the terminal associated with file descriptor
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.IR fd .
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First it tries to map
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.I fd
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to a terminal name with
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.BR ttyname (3),
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then it searches the
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.BR ttytab (5)
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database with the
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.BR getttyent (3)
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function for this terminal. This means that the utmp slot number is the
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same as the ttytab entry number counting from 1. The value 0 is returned if
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no slot number can be found for a file descriptor.
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.SH "SEE ALSO"
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.BR ttyname (3),
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.BR getttyent (3),
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.BR utmp (5),
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.BR ttytab (5),
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.BR init (8).
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.SH NOTES
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Since 0 is used as an error return this means that the first entry in the
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utmp file is not used.
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.PP
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.B Ttyslot()
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is often found in a UNIX implementation,
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.B fttyslot()
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is MINIX 3 specific.
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.SH AUTHOR
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Kees J. Bot (kjb@cs.vu.nl)
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