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Re: [PATCH] Fix Linux fcntl OFD locks for non-LFS architectures (BZ#20251)
Ping.
On 21/05/2018 16:00, Adhemerval Zanella wrote:
> Updated version, change from previous one:
>
> - Adjsut abilist with recent changes to remove the ABI tags.
> - Do not export __fcntl64 (there is no need to mimic old behavior).
>
> ---
>
> This patch fixes the OFD ("file private") locks for architectures that
> support non-LFS flock definition (__USE_FILE_OFFSET64 not defined). The
> issue in this case is both F_OFD_{GETLK,SETLK,SETLKW} and
> F_{SET,GET}L{W}K64 expects a flock64 argument and when using old F_OFD_*
> flags with a non LFS flock argument the kernel might interpret the underlying
> data wrongly. Kernel idea originally was to avoid using such flags in
> non-LFS syscall, but since GLIBC uses fcntl with LFS semantic as default
> it is possible to provide the functionality and avoid the bogus struct kernel
> passing by adjusting the struct manually for the required flags.
>
> The idea follows other LFS interfaces that provide two symbols:
>
> 1. A new LFS fcntl64 is added on default ABI with the usual macros to select
> it for FILE_OFFSET_BITS=64.
>
> 2. The Linux non-LFS fcntl use a stack allocated struct flock64 for
> F_OFD_{GETLK,SETLK,SETLKW} and F_{SET,GET}L{W}K64 and copy the results on
> the user provided struct.
>
> 3. Keep a compat symbol with old broken semantic for architectures that do
> not define __OFF_T_MATCHES_OFF64_T.
>
> So for architectures which defines __USE_FILE_OFFSET64, fcntl64 will aliased
> to fcntl and no adjustment would be required.
>
> Checked on x86_64-linux-gnu and i686-linux-gnu.
>
> [BZ #20251]
> * include/fcntl.h (__libc_fcntl64, __fcntl64): New prototype.
> * io/Makefile (routines): Add fcntl64.
> (CFLAGS-fcntl64.c): New rule.
> * io/fcntl.h (fcntl64): Add prototype and redirect if
> __USE_FILE_OFFSET64 is defined.
> * sysdeps/unix/sysv/linux/powerpc/powerpc64/fcntl.c: Remove file.
> * io/fcntl64.c: New file.
> * nptl/Makefile (pthread-compat-wrappers): Add fcntl64.
> (CFLAGS-fcntl64.c): New rule.
> * sysdeps/mach/hurd/fcntl.c: Alias fcntl to fcntl64 symbols.
> * io/Versions [GLIBC_2.28] (fcntl64; __fcntl64): New symbols.
> * sysdeps/unix/sysv/linux/fcntl.c (__libc_fcntl): Fix F_GETLK64,
> F_OFD_GETLK, F_SETLK64, F_SETLKW64, F_OFD_SETLK, and F_OFD_SETLKW for
> non-LFS case.
> (fcntl_common, __fcntl_nocancel): Remove function.
> (flock_to_flock64): New function.
> * sysdeps/unix/sysv/linux/fcntl64.c: New file.
> * sysdeps/mach/hurd/i386/libc.abilist [GLIBC_2.28] (__fcntl64, fcntl,
> fcntl64): New symbols.
> * sysdeps/unix/sysv/linux/hppa/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/arm/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/microblaze/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/i386/libc.abilis: Likewise.
> * sysdeps/unix/sysv/linux/nios2/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/powerpc/kernel-features.h: Likewise.
> * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist:
> Likewise.
> * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist:
> Likewise.
> * sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/sh/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/aarch64/libc.abilist [GLIBC_2.28] (__fcntl64,
> fcntl64): New symbols.
> * sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise.
> * sysdeps/sysv/linux/powerpc/powerpc64/libc-le.abilist: Likewise.
> * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/tile/tilegx32/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/tile/tilegx64/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise.
> * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
> ---
> ChangeLog | 54 ++++++++++
> include/fcntl.h | 4 +
> io/Makefile | 3 +-
> io/Versions | 3 +
> io/fcntl.h | 11 ++
> .../powerpc/powerpc64/fcntl.c => io/fcntl64.c | 28 ++++--
> nptl/Makefile | 3 +-
> sysdeps/mach/hurd/fcntl.c | 5 +
> sysdeps/mach/hurd/i386/libc.abilist | 2 +
> sysdeps/unix/sysv/linux/aarch64/libc.abilist | 1 +
> sysdeps/unix/sysv/linux/alpha/libc.abilist | 1 +
> sysdeps/unix/sysv/linux/arm/libc.abilist | 2 +
> sysdeps/unix/sysv/linux/fcntl.c | 111 +++++++++++++--------
> sysdeps/unix/sysv/linux/fcntl64.c | 99 ++++++++++++++++++
> sysdeps/unix/sysv/linux/hppa/libc.abilist | 2 +
> sysdeps/unix/sysv/linux/i386/libc.abilist | 2 +
> sysdeps/unix/sysv/linux/ia64/libc.abilist | 1 +
> sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist | 2 +
> sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist | 2 +
> sysdeps/unix/sysv/linux/microblaze/libc.abilist | 2 +
> .../unix/sysv/linux/mips/mips32/fpu/libc.abilist | 2 +
> .../unix/sysv/linux/mips/mips32/nofpu/libc.abilist | 2 +
> .../unix/sysv/linux/mips/mips64/n32/libc.abilist | 2 +
> .../unix/sysv/linux/mips/mips64/n64/libc.abilist | 1 +
> sysdeps/unix/sysv/linux/nios2/libc.abilist | 2 +
> sysdeps/unix/sysv/linux/powerpc/kernel-features.h | 9 ++
> .../sysv/linux/powerpc/powerpc32/fpu/libc.abilist | 2 +
> .../linux/powerpc/powerpc32/nofpu/libc.abilist | 2 +
> .../sysv/linux/powerpc/powerpc64/libc-le.abilist | 3 +
> .../unix/sysv/linux/powerpc/powerpc64/libc.abilist | 1 +
> sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist | 1 +
> sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist | 2 +
> sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist | 1 +
> sysdeps/unix/sysv/linux/sh/libc.abilist | 2 +
> sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist | 2 +
> sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist | 1 +
> sysdeps/unix/sysv/linux/x86_64/64/libc.abilist | 1 +
> sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist | 1 +
> 38 files changed, 323 insertions(+), 52 deletions(-)
> rename sysdeps/unix/sysv/linux/powerpc/powerpc64/fcntl.c => io/fcntl64.c (65%)
> create mode 100644 sysdeps/unix/sysv/linux/fcntl64.c
>
>
> diff --git a/include/fcntl.h b/include/fcntl.h
> index 3d68c5e..374e784 100644
> --- a/include/fcntl.h
> +++ b/include/fcntl.h
> @@ -10,10 +10,14 @@ extern int __libc_open (const char *file, int oflag, ...);
> libc_hidden_proto (__libc_open)
> extern int __libc_fcntl (int fd, int cmd, ...) attribute_hidden;
> libc_hidden_proto (__libc_fcntl)
> +extern int __libc_fcntl64 (int fd, int cmd, ...) attribute_hidden;
> +libc_hidden_proto (__libc_fcntl64)
> extern int __open (const char *__file, int __oflag, ...);
> libc_hidden_proto (__open)
> extern int __fcntl (int __fd, int __cmd, ...);
> libc_hidden_proto (__fcntl)
> +extern int __fcntl64 (int __fd, int __cmd, ...) attribute_hidden;
> +libc_hidden_proto (__fcntl64)
> extern int __openat (int __fd, const char *__file, int __oflag, ...)
> __nonnull ((2));
> libc_hidden_proto (__openat)
> diff --git a/io/Makefile b/io/Makefile
> index 2117cb6..4a0d8fe 100644
> --- a/io/Makefile
> +++ b/io/Makefile
> @@ -40,7 +40,7 @@ routines := \
> mkdir mkdirat \
> open open_2 open64 open64_2 openat openat_2 openat64 openat64_2 \
> read write lseek lseek64 access euidaccess faccessat \
> - fcntl flock lockf lockf64 \
> + fcntl fcntl64 flock lockf lockf64 \
> close dup dup2 dup3 pipe pipe2 \
> creat creat64 \
> chdir fchdir \
> @@ -89,6 +89,7 @@ CFLAGS-open64.c += -fexceptions -fasynchronous-unwind-tables
> CFLAGS-creat.c += -fexceptions -fasynchronous-unwind-tables
> CFLAGS-creat64.c += -fexceptions -fasynchronous-unwind-tables
> CFLAGS-fcntl.c += -fexceptions -fasynchronous-unwind-tables
> +CFLAGS-fcntl64.c += -fexceptions -fasynchronous-unwind-tables
> CFLAGS-poll.c += -fexceptions -fasynchronous-unwind-tables
> CFLAGS-ppoll.c += -fexceptions -fasynchronous-unwind-tables
> CFLAGS-lockf.c += -fexceptions
> diff --git a/io/Versions b/io/Versions
> index 98898cb..7653588 100644
> --- a/io/Versions
> +++ b/io/Versions
> @@ -128,4 +128,7 @@ libc {
> GLIBC_2.27 {
> copy_file_range;
> }
> + GLIBC_2.28 {
> + fcntl64;
> + }
> }
> diff --git a/io/fcntl.h b/io/fcntl.h
> index 69a4394..3afc620 100644
> --- a/io/fcntl.h
> +++ b/io/fcntl.h
> @@ -167,7 +167,18 @@ typedef __pid_t pid_t;
>
> This function is a cancellation point and therefore not marked with
> __THROW. */
> +#ifndef __USE_FILE_OFFSET64
> extern int fcntl (int __fd, int __cmd, ...);
> +#else
> +# ifdef __REDIRECT
> +extern int __REDIRECT (fcntl, (int __fd, int __cmd, ...), fcntl64);
> +# else
> +# define fcntl fcntl64
> +# endif
> +#endif
> +#ifdef __USE_LARGEFILE64
> +extern int fcntl64 (int __fd, int __cmd, ...);
> +#endif
>
> /* Open FILE and return a new file descriptor for it, or -1 on error.
> OFLAG determines the type of access used. If O_CREAT or O_TMPFILE is set
> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/fcntl.c b/io/fcntl64.c
> similarity index 65%
> rename from sysdeps/unix/sysv/linux/powerpc/powerpc64/fcntl.c
> rename to io/fcntl64.c
> index 48198c1..f4e6809 100644
> --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/fcntl.c
> +++ b/io/fcntl64.c
> @@ -1,4 +1,5 @@
> -/* Copyright (C) 2000-2018 Free Software Foundation, Inc.
> +/* Manipulate file descriptor. Stub LFS version.
> + Copyright (C) 2018 Free Software Foundation, Inc.
> This file is part of the GNU C Library.
>
> The GNU C Library is free software; you can redistribute it and/or
> @@ -15,18 +16,23 @@
> License along with the GNU C Library; if not, see
> <http://www.gnu.org/licenses/>. */
>
> -#include <unistd.h>
> +#include <errno.h>
> #include <fcntl.h>
>
> -static inline int
> -fcntl_adjust_cmd (int cmd)
> +/* Perform file control operations on FD. */
> +int
> +__fcntl64 (int fd, int cmd, ...)
> {
> - if (cmd >= F_GETLK64 && cmd <= F_SETLKW64)
> - cmd -= F_GETLK64 - F_GETLK;
> - return cmd;
> -}
> + if (fd < 0)
> + {
> + __set_errno (EBADF);
> + return -1;
> + }
>
> -#define FCNTL_ADJUST_CMD(__cmd) \
> - fcntl_adjust_cmd (__cmd)
> + __set_errno (ENOSYS);
> + return -1;
> +}
> +libc_hidden_def (__fcntl64)
> +stub_warning (fcntl64)
>
> -#include <sysdeps/unix/sysv/linux/fcntl.c>
> +weak_alias (__fcntl64, fcntl64)
> diff --git a/nptl/Makefile b/nptl/Makefile
> index 94be92c..13d485c 100644
> --- a/nptl/Makefile
> +++ b/nptl/Makefile
> @@ -36,7 +36,7 @@ static-only-routines = pthread_atfork
> # We need to provide certain routines for compatibility with existing
> # binaries.
> pthread-compat-wrappers = \
> - write read close fcntl accept \
> + write read close fcntl fcntl64 accept \
> connect recv recvfrom send \
> sendto fsync lseek lseek64 \
> msync nanosleep open open64 pause \
> @@ -191,6 +191,7 @@ CFLAGS-sem_timedwait.c += -fexceptions -fasynchronous-unwind-tables
>
> # These are the function wrappers we have to duplicate here.
> CFLAGS-fcntl.c += -fexceptions -fasynchronous-unwind-tables
> +CFLAGS-fcntl64.c += -fexceptions -fasynchronous-unwind-tables
> CFLAGS-lockf.c += -fexceptions
> CFLAGS-pread.c += -fexceptions -fasynchronous-unwind-tables
> CFLAGS-pread64.c += -fexceptions -fasynchronous-unwind-tables
> diff --git a/sysdeps/mach/hurd/fcntl.c b/sysdeps/mach/hurd/fcntl.c
> index 0b23164..598317d 100644
> --- a/sysdeps/mach/hurd/fcntl.c
> +++ b/sysdeps/mach/hurd/fcntl.c
> @@ -210,3 +210,8 @@ libc_hidden_def (__libc_fcntl)
> weak_alias (__libc_fcntl, __fcntl)
> libc_hidden_weak (__fcntl)
> weak_alias (__libc_fcntl, fcntl)
> +
> +strong_alias (__libc_fcntl, __libc_fcntl64)
> +libc_hidden_def (__libc_fcntl64)
> +weak_alias (__libc_fcntl64, __fcntl64)
> +libc_hidden_weak (__fcntl64)
> diff --git a/sysdeps/mach/hurd/i386/libc.abilist b/sysdeps/mach/hurd/i386/libc.abilist
> index 2cb5070..3d46de7 100644
> --- a/sysdeps/mach/hurd/i386/libc.abilist
> +++ b/sysdeps/mach/hurd/i386/libc.abilist
> @@ -2033,6 +2033,8 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
> index 80cdb98..884d0df 100644
> --- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
> @@ -2131,3 +2131,4 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 fcntl64 F
> diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist
> index c761f61..28d54b9 100644
> --- a/sysdeps/unix/sysv/linux/alpha/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist
> @@ -2026,6 +2026,7 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/arm/libc.abilist b/sysdeps/unix/sysv/linux/arm/libc.abilist
> index 6aa58c3..dfde3bd 100644
> --- a/sysdeps/unix/sysv/linux/arm/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/arm/libc.abilist
> @@ -115,6 +115,8 @@ GLIBC_2.27 wcstof32x F
> GLIBC_2.27 wcstof32x_l F
> GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.4 _Exit F
> GLIBC_2.4 _IO_2_1_stderr_ D 0xa0
> GLIBC_2.4 _IO_2_1_stdin_ D 0xa0
> diff --git a/sysdeps/unix/sysv/linux/fcntl.c b/sysdeps/unix/sysv/linux/fcntl.c
> index a3cb2ae..ada922b 100644
> --- a/sysdeps/unix/sysv/linux/fcntl.c
> +++ b/sysdeps/unix/sysv/linux/fcntl.c
> @@ -19,33 +19,12 @@
> #include <stdarg.h>
> #include <errno.h>
> #include <sysdep-cancel.h>
> -#include <not-cancel.h>
>
> -#ifndef __NR_fcntl64
> -# define __NR_fcntl64 __NR_fcntl
> -#endif
> +#ifndef __OFF_T_MATCHES_OFF64_T
>
> -#ifndef FCNTL_ADJUST_CMD
> -# define FCNTL_ADJUST_CMD(__cmd) __cmd
> -#endif
> -
> -static int
> -fcntl_common (int fd, int cmd, void *arg)
> -{
> - if (cmd == F_GETOWN)
> - {
> - INTERNAL_SYSCALL_DECL (err);
> - struct f_owner_ex fex;
> - int res = INTERNAL_SYSCALL_CALL (fcntl64, err, fd, F_GETOWN_EX, &fex);
> - if (!INTERNAL_SYSCALL_ERROR_P (res, err))
> - return fex.type == F_OWNER_GID ? -fex.pid : fex.pid;
> -
> - return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (res,
> - err));
> - }
> -
> - return INLINE_SYSCALL_CALL (fcntl64, fd, cmd, (void *) arg);
> -}
> +# ifndef FCNTL_ADJUST_CMD
> +# define FCNTL_ADJUST_CMD(__cmd) __cmd
> +# endif
>
> int
> __libc_fcntl (int fd, int cmd, ...)
> @@ -59,16 +38,71 @@ __libc_fcntl (int fd, int cmd, ...)
>
> cmd = FCNTL_ADJUST_CMD (cmd);
>
> - if (cmd == F_SETLKW || cmd == F_SETLKW64)
> - return SYSCALL_CANCEL (fcntl64, fd, cmd, (void *) arg);
> -
> - return fcntl_common (fd, cmd, arg);
> + switch (cmd)
> + {
> + case F_SETLKW:
> + return SYSCALL_CANCEL (fcntl64, fd, cmd, arg);
> + case F_GETLK64:
> + case F_OFD_GETLK:
> + {
> + struct flock *flk = (struct flock *) arg;
> + struct flock64 flk64 =
> + {
> + .l_type = flk->l_type,
> + .l_whence = flk->l_whence,
> + .l_start = flk->l_start,
> + .l_len = flk->l_len,
> + .l_pid = flk->l_pid
> + };
> + int ret = SYSCALL_CANCEL (fcntl64, fd, cmd, &flk64);
> + if (ret == -1)
> + return -1;
> + flk->l_type = flk64.l_type;
> + flk->l_whence = flk64.l_whence;
> + flk->l_start = flk64.l_start;
> + flk->l_len = flk64.l_len;
> + flk->l_pid = flk64.l_pid;
> + return ret;
> + }
> + case F_SETLK64:
> + case F_SETLKW64:
> + case F_OFD_SETLK:
> + case F_OFD_SETLKW:
> + {
> + struct flock *flk = (struct flock *) arg;
> + struct flock64 flk64 =
> + {
> + .l_type = flk->l_type,
> + .l_whence = flk->l_whence,
> + .l_start = flk->l_start,
> + .l_len = flk->l_len,
> + .l_pid = flk->l_pid
> + };
> + return SYSCALL_CANCEL (fcntl64, fd, cmd, &flk64);
> + }
> + case F_GETOWN:
> + {
> + INTERNAL_SYSCALL_DECL (err);
> + struct f_owner_ex fex;
> + int res = INTERNAL_SYSCALL_CALL (fcntl64, err, fd, F_GETOWN_EX, &fex);
> + if (!INTERNAL_SYSCALL_ERROR_P (res, err))
> + return fex.type == F_OWNER_GID ? -fex.pid : fex.pid;
> +
> + return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (res,
> + err));
> + }
> + default:
> + return INLINE_SYSCALL_CALL (fcntl64, fd, cmd, arg);
> + }
> }
> libc_hidden_def (__libc_fcntl)
> +weak_alias (__libc_fcntl, __fcntl)
> +libc_hidden_weak (__fcntl)
>
> -#if !IS_IN (rtld)
> +# include <shlib-compat.h>
> +# if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_28)
> int
> -__fcntl_nocancel (int fd, int cmd, ...)
> +__old_libc_fcntl64 (int fd, int cmd, ...)
> {
> va_list ap;
> void *arg;
> @@ -77,13 +111,12 @@ __fcntl_nocancel (int fd, int cmd, ...)
> arg = va_arg (ap, void *);
> va_end (ap);
>
> - return fcntl_common (fd, cmd, arg);
> + return __libc_fcntl64 (fd, cmd, arg);
> }
> -#else
> -strong_alias (__libc_fcntl, __fcntl_nocancel)
> -#endif
> -libc_hidden_def (__fcntl_nocancel)
> -
> -weak_alias (__libc_fcntl, __fcntl)
> -libc_hidden_weak (__fcntl)
> +compat_symbol (libc, __old_libc_fcntl64, fcntl, GLIBC_2_0);
> +versioned_symbol (libc, __libc_fcntl, fcntl, GLIBC_2_28);
> +# else
> weak_alias (__libc_fcntl, fcntl)
> +# endif
> +
> +#endif /* __OFF_T_MATCHES_OFF64_T */
> diff --git a/sysdeps/unix/sysv/linux/fcntl64.c b/sysdeps/unix/sysv/linux/fcntl64.c
> new file mode 100644
> index 0000000..b7f50b0
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/fcntl64.c
> @@ -0,0 +1,99 @@
> +/* Manipulate file descriptor. Linux LFS version.
> + Copyright (C) 2018 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <http://www.gnu.org/licenses/>. */
> +
> +#define fcntl __no_decl_fcntl
> +#define __fcntl __no_decl___fcntl
> +#include <fcntl.h>
> +#undef fcntl
> +#undef __fcntl
> +#include <stdarg.h>
> +#include <errno.h>
> +#include <sysdep-cancel.h>
> +
> +#ifndef __NR_fcntl64
> +# define __NR_fcntl64 __NR_fcntl
> +#endif
> +
> +#ifndef FCNTL_ADJUST_CMD
> +# define FCNTL_ADJUST_CMD(__cmd) __cmd
> +#endif
> +
> +static int
> +fcntl64_common (int fd, int cmd, void *arg)
> +{
> + if (cmd == F_GETOWN)
> + {
> + INTERNAL_SYSCALL_DECL (err);
> + struct f_owner_ex fex;
> + int res = INTERNAL_SYSCALL_CALL (fcntl64, err, fd, F_GETOWN_EX, &fex);
> + if (!INTERNAL_SYSCALL_ERROR_P (res, err))
> + return fex.type == F_OWNER_GID ? -fex.pid : fex.pid;
> +
> + return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (res,
> + err));
> + }
> +
> + return INLINE_SYSCALL_CALL (fcntl64, fd, cmd, (void *) arg);
> +}
> +
> +int
> +__libc_fcntl64 (int fd, int cmd, ...)
> +{
> + va_list ap;
> + void *arg;
> +
> + va_start (ap, cmd);
> + arg = va_arg (ap, void *);
> + va_end (ap);
> +
> + cmd = FCNTL_ADJUST_CMD (cmd);
> +
> + if (cmd == F_SETLKW || cmd == F_SETLKW64)
> + return SYSCALL_CANCEL (fcntl64, fd, cmd, (void *) arg);
> +
> + return fcntl64_common (fd, cmd, arg);
> +}
> +libc_hidden_def (__libc_fcntl64)
> +weak_alias (__libc_fcntl64, __fcntl64)
> +libc_hidden_weak (__fcntl64)
> +weak_alias (__libc_fcntl64, fcntl64)
> +
> +#ifdef __OFF_T_MATCHES_OFF64_T
> +weak_alias (__libc_fcntl64, __libc_fcntl)
> +weak_alias (__libc_fcntl64, __fcntl)
> +weak_alias (__libc_fcntl64, __GI___fcntl)
> +weak_alias (__libc_fcntl64, fcntl)
> +#endif
> +
> +#if !IS_IN (rtld)
> +int
> +__fcntl_nocancel (int fd, int cmd, ...)
> +{
> + va_list ap;
> + void *arg;
> +
> + va_start (ap, cmd);
> + arg = va_arg (ap, void *);
> + va_end (ap);
> +
> + return fcntl64_common (fd, cmd, arg);
> +}
> +#else
> +weak_alias (__libc_fcntl64, __fcntl_nocancel)
> +#endif
> +weak_alias (__fcntl_nocancel, __GI___fcntl_nocancel)
> diff --git a/sysdeps/unix/sysv/linux/hppa/libc.abilist b/sysdeps/unix/sysv/linux/hppa/libc.abilist
> index d10695b..06b00f7 100644
> --- a/sysdeps/unix/sysv/linux/hppa/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/hppa/libc.abilist
> @@ -1872,6 +1872,8 @@ GLIBC_2.27 wcstof32x F
> GLIBC_2.27 wcstof32x_l F
> GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/i386/libc.abilist b/sysdeps/unix/sysv/linux/i386/libc.abilist
> index 23092ab..1c1cc00 100644
> --- a/sysdeps/unix/sysv/linux/i386/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/i386/libc.abilist
> @@ -2037,6 +2037,8 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/ia64/libc.abilist b/sysdeps/unix/sysv/linux/ia64/libc.abilist
> index 7bf259e..f6e17a0 100644
> --- a/sysdeps/unix/sysv/linux/ia64/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/ia64/libc.abilist
> @@ -1907,6 +1907,7 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
> index 4673bcd..ee054a6 100644
> --- a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
> @@ -116,6 +116,8 @@ GLIBC_2.27 wcstof32x F
> GLIBC_2.27 wcstof32x_l F
> GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.4 _Exit F
> GLIBC_2.4 _IO_2_1_stderr_ D 0x98
> GLIBC_2.4 _IO_2_1_stdin_ D 0x98
> diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
> index 1f8ac40..227a058 100644
> --- a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
> @@ -1981,6 +1981,8 @@ GLIBC_2.27 wcstof32x F
> GLIBC_2.27 wcstof32x_l F
> GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/microblaze/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/libc.abilist
> index 09277f5..18781b3 100644
> --- a/sysdeps/unix/sysv/linux/microblaze/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/microblaze/libc.abilist
> @@ -2122,3 +2122,5 @@ GLIBC_2.27 wcstof32x F
> GLIBC_2.27 wcstof32x_l F
> GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
> index f562e20..2d86989 100644
> --- a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
> @@ -1959,6 +1959,8 @@ GLIBC_2.27 wcstof32x F
> GLIBC_2.27 wcstof32x_l F
> GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
> index ceb7388..b8b113e 100644
> --- a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
> @@ -1957,6 +1957,8 @@ GLIBC_2.27 wcstof32x F
> GLIBC_2.27 wcstof32x_l F
> GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
> index 5765f48..6a3cd13 100644
> --- a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
> @@ -1965,6 +1965,8 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
> index a84bb45..596ec05 100644
> --- a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
> @@ -1961,6 +1961,7 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/nios2/libc.abilist b/sysdeps/unix/sysv/linux/nios2/libc.abilist
> index e432959..8da18ee 100644
> --- a/sysdeps/unix/sysv/linux/nios2/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/nios2/libc.abilist
> @@ -2163,3 +2163,5 @@ GLIBC_2.27 wcstof32x F
> GLIBC_2.27 wcstof32x_l F
> GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> diff --git a/sysdeps/unix/sysv/linux/powerpc/kernel-features.h b/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
> index 503f562..dd8a7ea 100644
> --- a/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
> +++ b/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
> @@ -52,3 +52,12 @@
>
> #undef __ASSUME_CLONE_DEFAULT
> #define __ASSUME_CLONE_BACKWARDS 1
> +
> +#ifdef __powerpc64__
> +# define FCNTL_ADJUST_CMD(__cmd) \
> + ({ int __cmdadj = (__cmd); \
> + if (__cmdadj >= F_GETLK64 && __cmdadj <= F_SETLKW64) \
> + __cmdadj -= F_GETLK64 - F_GETLK; \
> + __cmdadj; \
> + })
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
> index a5f2b23..555751e 100644
> --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
> @@ -1985,6 +1985,8 @@ GLIBC_2.27 wcstof32x F
> GLIBC_2.27 wcstof32x_l F
> GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
> index e4cbe36..80324e4 100644
> --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
> @@ -1989,6 +1989,8 @@ GLIBC_2.27 wcstof32x F
> GLIBC_2.27 wcstof32x_l F
> GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
> index 9869feb..079bbb4 100644
> --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
> +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
> @@ -2221,3 +2221,6 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 GLIBC_2.28 A
> +GLIBC_2.28 __fcntl64 F
> +GLIBC_2.28 fcntl64 F
> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
> index e526dc4..15be314 100644
> --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
> @@ -116,6 +116,7 @@ GLIBC_2.27 wcstof32x F
> GLIBC_2.27 wcstof32x_l F
> GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 _Exit F
> GLIBC_2.3 _IO_2_1_stderr_ D 0xe0
> GLIBC_2.3 _IO_2_1_stdin_ D 0xe0
> diff --git a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist
> index e6319ee..436b992 100644
> --- a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist
> @@ -2093,3 +2093,4 @@ GLIBC_2.27 xdrstdio_create F
> GLIBC_2.27 xencrypt F
> GLIBC_2.27 xprt_register F
> GLIBC_2.27 xprt_unregister F
> +GLIBC_2.28 fcntl64 F
> diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
> index 41cdda0..f66715f 100644
> --- a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
> @@ -1994,6 +1994,8 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
> index 8a756cf..bd62428 100644
> --- a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
> @@ -1900,6 +1900,7 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/sh/libc.abilist b/sysdeps/unix/sysv/linux/sh/libc.abilist
> index 999bddd..f2f070f 100644
> --- a/sysdeps/unix/sysv/linux/sh/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/sh/libc.abilist
> @@ -1876,6 +1876,8 @@ GLIBC_2.27 wcstof32x F
> GLIBC_2.27 wcstof32x_l F
> GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
> index 7c4296f..265087f 100644
> --- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
> @@ -1988,6 +1988,8 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 fcntl F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
> index dafe9d7..16a6981 100644
> --- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
> @@ -1930,6 +1930,7 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
> index f72d494..fa8c198 100644
> --- a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
> @@ -1888,6 +1888,7 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 fcntl64 F
> GLIBC_2.3 __ctype_b_loc F
> GLIBC_2.3 __ctype_tolower_loc F
> GLIBC_2.3 __ctype_toupper_loc F
> diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
> index 96c9fa0..2536971 100644
> --- a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
> @@ -2139,3 +2139,4 @@ GLIBC_2.27 wcstof64 F
> GLIBC_2.27 wcstof64_l F
> GLIBC_2.27 wcstof64x F
> GLIBC_2.27 wcstof64x_l F
> +GLIBC_2.28 fcntl64 F
>