Manpage of FREAD
FREADSection: Linux Programmer's Manual (3)
NAMEfread, fwrite - binary stream input/output
#include <stdio.h>size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream);
DESCRIPTIONThe function fread() reads nmembitems of data, each sizebytes long, from the stream pointed to by stream, storing them at the location given by ptr.
The function fwrite() writes nmembitems of data, each sizebytes long, to the stream pointed to by stream, obtaining them from the location given by ptr.
For nonlocking counterparts, see unlocked_stdio(3).
RETURN VALUEOn success, fread() and fwrite() return the number of items read or written. This number equals the number of bytes transferred only when sizeis 1. If an error occurs, or the end of the file is reached, the return value is a short item count (or zero).
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
|fread(), fwrite()||Thread safety||MT-Safe|
CONFORMING TOPOSIX.1-2001, POSIX.1-2008, C89.
SEE ALSOread(2), write(2), feof(3), ferror(3), unlocked_stdio(3)
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