38 lines
1.2 KiB
Groff
38 lines
1.2 KiB
Groff
. \" Manual Seite fuer fdown
|
|
. \" @(#)fdown.3 1.1
|
|
. \"
|
|
.if t .ds a \v'-0.55m'\h'0.00n'\z.\h'0.40n'\z.\v'0.55m'\h'-0.40n'a
|
|
.if t .ds o \v'-0.55m'\h'0.00n'\z.\h'0.45n'\z.\v'0.55m'\h'-0.45n'o
|
|
.if t .ds u \v'-0.55m'\h'0.00n'\z.\h'0.40n'\z.\v'0.55m'\h'-0.40n'u
|
|
.if t .ds A \v'-0.77m'\h'0.25n'\z.\h'0.45n'\z.\v'0.77m'\h'-0.70n'A
|
|
.if t .ds O \v'-0.77m'\h'0.25n'\z.\h'0.45n'\z.\v'0.77m'\h'-0.70n'O
|
|
.if t .ds U \v'-0.77m'\h'0.30n'\z.\h'0.45n'\z.\v'0.77m'\h'-.75n'U
|
|
.if t .ds s \(*b
|
|
.if t .ds S SS
|
|
.if n .ds a ae
|
|
.if n .ds o oe
|
|
.if n .ds u ue
|
|
.if n .ds s sz
|
|
.TH FDOWN 3 "15. Juli 1988" "J\*org Schilling" "Schily\'s LIBRARY FUNCTIONS"
|
|
.SH NAME
|
|
fdown() \- returns a logical unit number
|
|
.SH SYNOPSIS
|
|
.nf
|
|
.B
|
|
int fdown(f)
|
|
.B FILE *f;
|
|
.fi
|
|
.SH DESCRIPTION
|
|
fdown(), given a standard I/O FILE *f, returns the file
|
|
number. A file number is usually a small number like 2
|
|
which is not a unique number system-wide but is peculiar to the
|
|
specified process.
|
|
fdown() can be used to implement additional functions not
|
|
provided for in the standard I/O library. It verifies that the
|
|
file was opened via fileopen().
|
|
.SH RETURNS
|
|
Returns the actual system file number.
|
|
.SH NOTES
|
|
Since this call is system dependent, it should be used
|
|
carefully.
|