off_t(3type) - Man pages

off_t(3type)                                                      off_t(3type)

NAME
       off_t, off64_t, loff_t - file sizes

LIBRARY
       Standard C library (libc)

SYNOPSIS
       #include <sys/types.h>

       typedef /* ... */  off_t;

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

       typedef /* ... */  off64_t;

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

       typedef /* ... */  loff_t;

DESCRIPTION
       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.

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

STANDARDS
       off_t: POSIX.1-2001 and later.
       off64_t: Present in glibc and some BSDs.
       loff_t: Linux-specific.

NOTES
       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>.

SEE ALSO
       copy_file_range(2),  llseek(2),  lseek(2),  mmap(2),  posix_fadvise(2),
       pread(2),  readahead(2),  sync_file_range(2),  truncate(2),  fseeko(3),
       lockf(3), lseek64(3), posix_fallocate(3), feature_test_macros(7)

Linux man-pages 6.03              2022-10-30                      off_t(3type)

Generated by dwww version 1.15 on Wed Jun 26 18:05:00 CEST 2024.