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glibc
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sysdeps
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unix
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sysv
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linux
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i386
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posix_fallocate64.c
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61 lines (50 loc) · 1.9 KB
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glibc
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sysdeps
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unix
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sysv
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linux
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i386
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posix_fallocate64.c
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/* Copyright (C) 2007 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <fcntl.h> #include <kernel-features.h> #include <sysdep.h> extern int __posix_fallocate64_l64 (int fd, __off64_t offset, __off64_t len); #define __posix_fallocate64_l64 static internal_fallocate64 #include <sysdeps/posix/posix_fallocate64.c> #undef __posix_fallocate64_l64 #if !defined __ASSUME_FALLOCATE && defined __NR_fallocate /* Defined in posix_fallocate.c. */ extern int __have_fallocate attribute_hidden; #endif extern int __fallocate64 (int fd, int mode, __off64_t offset, __off64_t len) attribute_hidden; /* Reserve storage for the data of the file associated with FD. */ int __posix_fallocate64_l64 (int fd, __off64_t offset, __off64_t len) { #ifdef __NR_fallocate # ifndef __ASSUME_FALLOCATE if (__builtin_expect (__have_fallocate >= 0, 1)) # endif { int res = __fallocate64 (fd, 0, offset, len); if (! res) return 0; # ifndef __ASSUME_FALLOCATE if (__builtin_expect (res == ENOSYS, 0)) __have_fallocate = -1; else # endif if (res != EOPNOTSUPP) return res; } #endif return internal_fallocate64 (fd, offset, len); }
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