off_t(3type) - BetterMan

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NAME

off_t, off64_t, loff_t - file sizes

Standard C library (libc)

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#include <sys/types.h>

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typedef\n /* ... */  \noff_t;

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#define _LARGEFILE64_SOURCE\n
\n#include <sys/types.h>

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typedef\n /* ... */  \noff64_t;

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#define _GNU_SOURCE\n
\n#include <sys/types.h>

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typedef\n /* ... */  \nloff_t;

off_t is used for describing file sizes. It is a signed integer type.

off64_t is a 64-bit version of the type, used in glibc.

loff_t is a 64-bit version of the type, introduced by the Linux kernel.

<aio.h> and <stdio.h> define off_t since POSIX.1-2008.

On some architectures, the width of off_t can be controlled with the feature test macro _FILE_OFFSET_BITS.

The following headers also provide off_t: <aio.h>, <fcntl.h>, <stdio.h>, <sys/mman.h>, <sys/stat.h>, and <unistd.h>.