fseek(3) - phpMan

FSEEK(3)                   Linux Programmer's Manual                  FSEEK(3)



NAME
       fgetpos, fseek, fsetpos, ftell, rewind - reposition a stream

SYNOPSIS
       #include <stdio.h>

       int fseek(FILE *stream, long offset, int whence);

       long ftell(FILE *stream);

       void rewind(FILE *stream);

       int fgetpos(FILE *stream, fpos_t *pos);
       int fsetpos(FILE *stream, fpos_t *pos);

DESCRIPTION
       The  fseek() function sets the file position indicator for the stream pointed to by
       stream.  The new position, measured in bytes, is obtained by adding offset bytes to
       the  position  specified  by  whence.   If  whence is set to SEEK_SET, SEEK_CUR, or
       SEEK_END, the offset is relative to the start of the  file,  the  current  position
       indicator, or end-of-file, respectively.  A successful call to the fseek() function
       clears the end-of-file indicator for the stream  and  undoes  any  effects  of  the
       ungetc(3) function on the same stream.

       The  ftell()  function obtains the current value of the file position indicator for
       the stream pointed to by stream.

       The rewind() function sets the file position indicator for the stream pointed to by
       stream to the beginning of the file.  It is equivalent to:

              (void) fseek(stream, 0L, SEEK_SET)

       except that the error indicator for the stream is also cleared (see clearerr(3)).

       The  fgetpos()  and  fsetpos()  functions  are  alternate  interfaces equivalent to
       ftell() and fseek() (with whence set to SEEK_SET), setting and storing the  current
       value  of  the file offset into or from the object referenced by pos.  On some non-
       Unix systems an fpos_t object may be a complex object and these routines may be the
       only way to portably reposition a text stream.

RETURN VALUE
       The  rewind()  function  returns  no value.  Upon successful completion, fgetpos(),
       fseek(), fsetpos() return 0, and ftell() returns the current offset.  Otherwise, -1
       is returned and errno is set to indicate the error.

ERRORS
       EBADF  The stream specified is not a seekable stream.

       EINVAL The whence argument to fseek() was not SEEK_SET, SEEK_END, or SEEK_CUR.

       The  functions  fgetpos(),  fseek(),  fsetpos(),  and ftell() may also fail and set
       errno for any of  the  errors  specified  for  the  routines  fflush(3),  fstat(2),
       lseek(2), and malloc(3).

CONFORMING TO
       C89, C99.

SEE ALSO
       lseek(2), fseeko(3)

COLOPHON
       This page is part of release 3.22 of the Linux man-pages project.  A description of
       the  project,  and  information   about   reporting   bugs,   can   be   found   at
       http://www.kernel.org/doc/man-pages/.



GNU                               1993-11-29                          FSEEK(3)

Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache/2.2.15 (CentOS)
Under GNU General Public License
2013-05-19 20:21 @127.0.0.1 CrawledBy CCBot/2.0