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| [9] | 1 | .TH TTYSLOT 3
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| 2 | .SH NAME
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| 3 | ttyslot, fttyslot \- utmp slot number
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| 4 | .SH SYNOPSIS
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| 5 | .nf
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| 6 | .ft B
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| 7 | #define _MINIX_SOURCE 1
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| 8 | #include <unistd.h>
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| 9 |
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| 10 | int ttyslot(void)
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| 11 | int fttyslot(int \fIfd\fP)
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| 12 | .fi
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| 13 | .ft P
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| 14 | .SH DESCRIPTION
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| 15 | .B Ttyslot()
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| 16 | returns the index of the login terminal in the
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| 17 | .B utmp
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| 18 | file. It tries
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| 19 | .B fttyslot()
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| 20 | on file descriptors
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| 21 | .BR 0,
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| 22 | .BR 1,
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| 23 | and
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| 24 | .BR 2
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| 25 | to find the index.
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| 26 | .PP
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| 27 | .B Fttyslot()
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| 28 | returns the utmp index of the terminal associated with file descriptor
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| 29 | .IR fd .
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| 30 | First it tries to map
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| 31 | .I fd
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| 32 | to a terminal name with
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| 33 | .BR ttyname (3),
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| 34 | then it searches the
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| 35 | .BR ttytab (5)
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| 36 | database with the
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| 37 | .BR getttyent (3)
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| 38 | function for this terminal. This means that the utmp slot number is the
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| 39 | same as the ttytab entry number counting from 1. The value 0 is returned if
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| 40 | no slot number can be found for a file descriptor.
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| 41 | .SH "SEE ALSO"
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| 42 | .BR ttyname (3),
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| 43 | .BR getttyent (3),
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| 44 | .BR utmp (5),
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| 45 | .BR ttytab (5),
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| 46 | .BR init (8).
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| 47 | .SH NOTES
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| 48 | Since 0 is used as an error return this means that the first entry in the
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| 49 | utmp file is not used.
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| 50 | .PP
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| 51 | .B Ttyslot()
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| 52 | is often found in a UNIX implementation,
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| 53 | .B fttyslot()
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| 54 | is MINIX 3 specific.
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| 55 | .SH AUTHOR
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| 56 | Kees J. Bot (kjb@cs.vu.nl)
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