From d4d8a129602f17b29ccdbffd55198fd6eb7bf9c7 Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Fri, 26 Aug 2016 12:19:18 -0300 Subject: Consolidate Linux truncate implementations This patch consolidates all Linux truncate implementation on sysdeps/unix/sysv/linux/truncate{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. * sysdeps/unix/sysv/linux/arm/truncate64.c: Remove file. * sysdeps/unix/sysv/linux/generic/wordsize-32/truncate.c: Likewise. * sysdeps/sysv/linux/generic/wordsize-32/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/truncate.c: New file. * sysdeps/unix/sysv/linux/truncate64.c (truncate64): Use INLINE_SYSCALL_CALL, __ALIGNMENT_ARG and SYSCALL_LL64 macros. * sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (truncate): Remove. * sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (truncate): Likewise. [1] https://sourceware.org/ml/libc-alpha/2016-08/msg00646.html --- sysdeps/unix/sysv/linux/truncate.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/truncate.c (limited to 'sysdeps/unix/sysv/linux/truncate.c') diff --git a/sysdeps/unix/sysv/linux/truncate.c b/sysdeps/unix/sysv/linux/truncate.c new file mode 100644 index 0000000000..9e712889e5 --- /dev/null +++ b/sysdeps/unix/sysv/linux/truncate.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 PATH to LENGTH bytes. */ +int +__truncate (const char *path, off_t length) +{ +# ifndef __NR_truncate + return INLINE_SYSCALL_CALL (truncate64, path, + __ALIGNMENT_ARG SYSCALL_LL (length)); +# else + return INLINE_SYSCALL_CALL (truncate, path, length); +# endif +} +weak_alias (__truncate, truncate) +#endif -- cgit v1.2.3-70-g09d2