Проект OpenNet: MAN fread (3) Библиотечные вызовы (FreeBSD и Linux)

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fread (3)

fread (3) ( Solaris man: Библиотечные вызовы )

>> fread (3) ( FreeBSD man: Библиотечные вызовы )

fread (3) ( Русские man: Библиотечные вызовы )

fread (3) ( Linux man: Библиотечные вызовы )

fread (3) ( POSIX man: Библиотечные вызовы )

BSD mandoc

NAME



fread

 
fwrite

 - binary stream input/output

LIBRARY

Lb libc

SYNOPSIS

#include <stdio.h>
size_t fread (void * restrict ptr size_t size size_t nmemb FILE * restrict stream);
size_t fwrite (const void * restrict ptr size_t size size_t nmemb FILE * restrict stream);

DESCRIPTION

The function fread ();
reads Fa nmemb objects, each Fa size bytes long, from the stream pointed to by Fa stream , storing them at the location given by Fa ptr .

The function fwrite ();
writes Fa nmemb objects, each Fa size bytes long, to the stream pointed to by Fa stream , obtaining them from the location given by Fa ptr .

RETURN VALUES

The functions fread ();
and fwrite ();
advance the file position indicator for the stream by the number of bytes read or written. They return the number of objects read or written. If an error occurs, or the end-of-file is reached, the return value is a short object count (or zero).

The function fread ();
does not distinguish between end-of-file and error, and callers must use feof(3) and ferror(3) to determine which occurred. The function fwrite ();
returns a value less than Fa nmemb only if a write error has occurred.