From 33a12b5540b8abbc4ee0ecb3a51912b3c7868517 Mon Sep 17 00:00:00 2001 From: "Anthony G. Basile" Date: Sun, 7 Sep 2014 15:33:46 -0400 Subject: libc: add fallocate() and fallocate64() We add the Linux-specific function fallocate() which allows the user to directly manipulate allocate space for a file. fallocate() can operate in different modes, but the default mode is equivalent to posix_fallocate() which is specified in POSIX.1. Recent releases of e2fsprogs 1.42.11 and above expect fallocate64() to be available. Signed-off-by: Anthony G. Basile Signed-off-by: Bernhard Reutner-Fischer --- libc/sysdeps/linux/common/fallocate64.c | 42 +++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 libc/sysdeps/linux/common/fallocate64.c (limited to 'libc/sysdeps/linux/common/fallocate64.c') diff --git a/libc/sysdeps/linux/common/fallocate64.c b/libc/sysdeps/linux/common/fallocate64.c new file mode 100644 index 000000000..cf75693d6 --- /dev/null +++ b/libc/sysdeps/linux/common/fallocate64.c @@ -0,0 +1,42 @@ +/* vi: set sw=4 ts=4: */ +/* + * fallocate() for uClibc - based off posix_fallocate() by Erik Andersen + * http://www.opengroup.org/onlinepubs/9699919799/functions/posix_fallocate.html + * + * Copyright (C) 2000-2006 Erik Andersen + * + * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + */ + +#include + +#include +#include +#include + +#if defined __NR_fallocate + +# if __WORDSIZE == 64 +/* Can use normal fallocate() */ +# elif __WORDSIZE == 32 +extern __typeof(fallocate64) __libc_fallocate64 attribute_hidden; +int attribute_hidden __libc_fallocate64(int fd, int mode, __off64_t offset, + __off64_t len) +{ + int ret; + INTERNAL_SYSCALL_DECL(err); + ret = (int) (INTERNAL_SYSCALL(fallocate, err, 6, fd, mode, + OFF64_HI_LO (offset), OFF64_HI_LO (len))); + if (unlikely(INTERNAL_SYSCALL_ERROR_P (ret, err))) + return INTERNAL_SYSCALL_ERRNO (ret, err); + return 0; +} + +# if defined __UCLIBC_LINUX_SPECIFIC__ && defined __USE_GNU +strong_alias(__libc_fallocate64,fallocate64) +# endif + +# else +# error your machine is neither 32 bit or 64 bit ... it must be magical +# endif +#endif -- cgit v1.2.3