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1 .\" Copyright 2001 Andries Brouwer <aeb@cwi.nl>.
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23 .TH FSEEKO 3 2001-11-05 "" "Linux Programmer's Manual"
24 .SH NAME
25 fseeko, ftello \- seek to or report file position
26 .SH SYNOPSIS
27 .nf
28 .B #include <stdio.h>
29 .sp
30 .BI "int fseeko(FILE *" stream ", off_t " offset ", int " whence );
31 .sp
32 .BI "off_t ftello(FILE *" stream );
33 .BI
34 .fi
35 .SH DESCRIPTION
36 The \fBfseeko()\fP and \fBftello()\fP functions are identical to
37 \fBfseek()\fP and \fBftell()\fP (see
38 .BR fseek (3)),
39 respectively, except that the \fIoffset\fP argument of \fBfseeko()\fP
40 and the return value of \fBftello()\fP is of type \fBoff_t\fP
41 instead of \fBlong\fP.
42 .LP
43 On many architectures both \fBoff_t\fP and \fBlong\fP are 32-bit types,
44 but compilation with
45 .RS
46 .nf
47 #define _FILE_OFFSET_BITS 64
48 .fi
49 .RE
50 will turn \fBoff_t\fP into a 64-bit type.
51 .SH NOTES
52 These functions are found on SysV-like systems.
53 They are not present in libc4, libc5, glibc 2.0 but available since glibc 2.1.
54 .SH "CONFORMING TO"
55 The
56 .B fseeko
57 and
58 .B ftello
59 functions conform to SUSv2.
60 .SH "SEE ALSO"
61 .BR fseek (3)