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
       _F_s_e_e_k  sets  the  position of the next input or output operation on the
       _s_t_r_e_a_m.  The new position is at the signed distance _o_f_f_s_e_t  bytes  from
       the  beginning, the current position, or the end of the file, according
       as _p_t_r_n_a_m_e has the value 0, 1, or 2.

       _F_s_e_e_k undoes any effects of _u_n_g_e_t_c(3S).

       _F_t_e_l_l returns the current value of the offset relative to the beginning
       of  the file associated with the named _s_t_r_e_a_m.  It is measured in bytes
       on UNIX; on some other systems it is a magic cookie, and the only fool‐
       proof way to obtain an _o_f_f_s_e_t for _f_s_e_e_k.

       _R_e_w_i_n_d(_s_t_r_e_a_m) is equivalent to _f_s_e_e_k(_s_t_r_e_a_m, 0L, 0).

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

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



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