67 lines
1.3 KiB
Groff
67 lines
1.3 KiB
Groff
.\" Copyright (c) 1980 Regents of the University of California.
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.\" All rights reserved. The Berkeley software License Agreement
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.\" specifies the terms and conditions for redistribution.
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.\"
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.\" @(#)fread.3s 6.1 (Berkeley) 5/15/85
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.\"
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.TH FREAD 3 "May 15, 1985"
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.UC 4
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.SH NAME
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fread, fwrite \- buffered binary input/output
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.SH SYNOPSIS
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.nf
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.ft B
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#include <sys/types.h>
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#include <stdio.h>
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size_t fread(void *\fIptr\fP, size_t \fIitemsize\fP, size_t \fInitems\fP, FILE *\fIstream\fP)
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size_t fwrite(void *\fIptr\fP, size_t \fIitemsize\fP, size_t \fInitems\fP, FILE *\fIstream\fP)
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.SH DESCRIPTION
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.B Fread
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reads, into a block beginning at
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.IR ptr ,
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.I nitems
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of data of the type of
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.I *ptr
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from the named input
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.IR stream .
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It returns the number of items actually read.
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.PP
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If
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.I stream
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is
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.B stdin
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and the standard output is line buffered, then any partial output line
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will be flushed before any call to
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.BR read (2)
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to satisfy the
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.BR fread .
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.PP
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.B Fwrite
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appends at most
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.I nitems
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of data of the type of
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.I *ptr
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beginning at
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.I ptr
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to the named output
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.IR stream .
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It returns the number of items actually written.
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.SH "SEE ALSO"
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.BR read (2),
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.BR write (2),
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.BR fopen (3),
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.BR getc (3),
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.BR putc (3),
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.BR gets (3),
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.BR puts (3),
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.BR printf (3),
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.BR scanf (3).
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.SH DIAGNOSTICS
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.B Fread
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and
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.B fwrite
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return
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0
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upon end of file or error.
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