Originální popis anglicky:
fread, fwrite - binary stream input/output
Návod, kniha: Linux Programmer's Manual
#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);
The function
fread reads
nmemb elements of data, each
size
bytes long, from the stream pointed to by
stream, storing them at the
location given by
ptr.
The function
fwrite writes
nmemb elements of data, each
size bytes long, to the stream pointed to by
stream, obtaining
them from the location given by
ptr.
For non-locking counterparts, see
unlocked_stdio(3).
fread and
fwrite return the number of items successfully read or
written (i.e., not the number of characters). If an error occurs, or the
end-of-file is reached, the return value is a short item count (or zero).
fread does not distinguish between end-of-file and error, and callers
must use
feof(3) and
ferror(3) to determine which occurred.
The functions
fread and
fwrite conform to ANSI X3.159-1989 (``ANSI
C'').
read(2),
write(2),
feof(3),
ferror(3),
unlocked_stdio(3)
