bsd man page for rewind

FSEEK(3S)																 FSEEK(3S)

NAME
       fseek, ftell, rewind - reposition a stream

SYNOPSIS
       #include <stdio.h>

       fseek(stream, offset, ptrname)
       FILE *stream;
       long offset;

       long ftell(stream)
       FILE *stream;

       rewind(stream)

DESCRIPTION
       Fseek  sets the position of the next input or output operation on the stream.  The new position is at the signed distance offset bytes from
       the beginning, the current position, or the end of the file, according as ptrname has the value 0, 1, or 2.

       Fseek undoes any effects of ungetc(3S).

       Ftell returns the current value of the offset relative to the beginning of the file associated with the named stream.  It  is  measured	in
       bytes on UNIX; on some other systems it is a magic cookie, and the only foolproof way to obtain an offset for fseek.

       Rewind(stream) is equivalent to fseek(stream, 0L, 0).

SEE ALSO
       lseek(2), fopen(3S)

DIAGNOSTICS
       Fseek returns -1 for improper seeks, otherwise zero.

7th Edition							 February 24, 1986							 FSEEK(3S)