diff options
Diffstat (limited to 'man-pages-posix-2003/man3p/ftell.3p')
-rw-r--r-- | man-pages-posix-2003/man3p/ftell.3p | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/man-pages-posix-2003/man3p/ftell.3p b/man-pages-posix-2003/man3p/ftell.3p new file mode 100644 index 0000000..8f1b4dc --- /dev/null +++ b/man-pages-posix-2003/man3p/ftell.3p @@ -0,0 +1,97 @@ +.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved +.TH "FTELL" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual" +.\" ftell +.SH PROLOG +This manual page is part of the POSIX Programmer's Manual. +The Linux implementation of this interface may differ (consult +the corresponding Linux manual page for details of Linux behavior), +or the interface may not be implemented on Linux. +.SH NAME +ftell, ftello \- return a file offset in a stream +.SH SYNOPSIS +.LP +\fB#include <stdio.h> +.br +.sp +long ftell(FILE *\fP\fIstream\fP\fB); +.br +\fP +.LP +\fBoff_t ftello(FILE *\fP\fIstream\fP\fB); \fP +\fB +.br +\fP +.SH DESCRIPTION +.LP +The \fIftell\fP() function shall obtain the current value of the file-position +indicator for the stream pointed to by +\fIstream\fP. +.LP +The +\fIftello\fP() function shall be equivalent to \fIftell\fP(), except +that the return value is of type \fBoff_t\fP. +.SH RETURN VALUE +.LP +Upon successful completion, \fIftell\fP() and \fIftello\fP() +\ shall return the current value of the file-position indicator for +the stream measured in bytes +from the beginning of the file. +.LP +Otherwise, \fIftell\fP() and \fIftello\fP() shall return +-1, cast to \fBlong\fP and \fBoff_t\fP respectively, and set \fIerrno\fP +to indicate the error. +.SH ERRORS +.LP +The \fIftell\fP() and \fIftello\fP() functions +shall fail if: +.TP 7 +.B EBADF +The file descriptor underlying \fIstream\fP is not an open file descriptor. +.TP 7 +.B EOVERFLOW +For \fIftell\fP(), the current file offset cannot be represented correctly +in an object of type \fBlong\fP. +.TP 7 +.B EOVERFLOW +For \fIftello\fP(), the current file offset cannot be represented +correctly in an object of type \fBoff_t\fP. +.TP 7 +.B ESPIPE +The file descriptor underlying \fIstream\fP is associated with a pipe +or FIFO. +.sp +.LP +The \fIftell\fP() function may fail if: +.TP 7 +.B ESPIPE +The file descriptor underlying \fIstream\fP is associated with a socket. +.sp +.LP +\fIThe following sections are informative.\fP +.SH EXAMPLES +.LP +None. +.SH APPLICATION USAGE +.LP +None. +.SH RATIONALE +.LP +None. +.SH FUTURE DIRECTIONS +.LP +None. +.SH SEE ALSO +.LP +\fIfgetpos\fP(), \fIfopen\fP(), \fIfseek\fP(), +\fIlseek\fP(), the Base Definitions volume of IEEE\ Std\ 1003.1-2001, +\fI<stdio.h>\fP +.SH COPYRIGHT +Portions of this text are reprinted and reproduced in electronic form +from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology +-- Portable Operating System Interface (POSIX), The Open Group Base +Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of +Electrical and Electronics Engineers, Inc and The Open Group. In the +event of any discrepancy between this version and the original IEEE and +The Open Group Standard, the original IEEE and The Open Group Standard +is the referee document. The original Standard can be obtained online at +http://www.opengroup.org/unix/online.html . |