From 87686aeefdf419bc7d02cae25f5b45e9306ba6ff Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Fri, 26 Aug 2016 10:42:58 -0300 Subject: Consolidate Linux ftruncate implementations THis patch consolidates all Linux ftruncate implementation on sysdeps/unix/sysv/linux/ftruncate{64}.c. It is based on {INTERNAL,INLINE}_SYSCALL patch [1] to simplify the syscall construction. General idea is to build ftruncate iff __OFF_T_MATCHES_OFF64_T is not defined, otherwise ftruncate64 will be build and ftruncate will be an alias. The fallocate will use old compat syscall and pass 32-bit off_t argument, while fallocate64 will handle the correct off64_t passing using __ALIGNMENT_ARG and SYSCALL_LL64 macros. Tested on x86_64, i386, aarch64, and armhf. * posix/tst-truncate-common.c: New file. * posix/tst-truncate.c: Use tst-truncate-common.c. * posix/tst-truncate64.c: Likewise and add LFS tests. * sysdeps/unix/sysv/linux/arm/ftruncate64.c: Remove file. * sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate.c: Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/ftruncate.c: New file. * sysdeps/unix/sysv/linux/ftruncate64.c (__ftruncate64): Use INLINE_SYSCALL_CALL, __ALIGNMENT_ARG and SYSCALL_LL64 macros. [__OFF_T_MATCHES_OFF64_T] (ftruncate): Add alias. * sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (ftruncate): Remove. * sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (ftruncate): Likewise. [1] https://sourceware.org/ml/libc-alpha/2016-08/msg00646.html --- sysdeps/unix/sysv/linux/ftruncate.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/ftruncate.c (limited to 'sysdeps/unix/sysv/linux/ftruncate.c') diff --git a/sysdeps/unix/sysv/linux/ftruncate.c b/sysdeps/unix/sysv/linux/ftruncate.c new file mode 100644 index 0000000000..5c0cd44ed0 --- /dev/null +++ b/sysdeps/unix/sysv/linux/ftruncate.c @@ -0,0 +1,35 @@ +/* Copyright (C) 2016 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 + . */ + +#include +#include +#include + +#ifndef __OFF_T_MATCHES_OFF64_T +/* Truncate the file FD refers to LENGTH bytes. */ +int +__ftruncate (int fd, off_t length) +{ +# ifndef __NR_ftruncate + return INLINE_SYSCALL_CALL (ftruncate64, fd, + __ALIGNMENT_ARG SYSCALL_LL (length)); +# else + return INLINE_SYSCALL_CALL (ftruncate, fd, length); +# endif +} +weak_alias (__ftruncate, ftruncate) +#endif -- cgit 1.4.1