diff options
| author | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2012-04-17 09:30:15 +0200 |
|---|---|---|
| committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2013-02-11 09:42:15 +0100 |
| commit | 5643900913f64c00f1c2958914586708efa5a473 (patch) | |
| tree | 4b0c5fcf655a00181098bbdfee1614fc119dd10a /libc/sysdeps/linux/common/posix_fallocate.c | |
| parent | 971db25812b6b7176f509a5f37964610a8f4b475 (diff) | |
libc: add posix_fallocate()
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libc/sysdeps/linux/common/posix_fallocate.c')
| -rw-r--r-- | libc/sysdeps/linux/common/posix_fallocate.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/posix_fallocate.c b/libc/sysdeps/linux/common/posix_fallocate.c new file mode 100644 index 000000000..9aaa6ce15 --- /dev/null +++ b/libc/sysdeps/linux/common/posix_fallocate.c @@ -0,0 +1,43 @@ +/* vi: set sw=4 ts=4: */ +/* + * posix_fallocate() for uClibc + * http://www.opengroup.org/onlinepubs/9699919799/functions/posix_fallocate.html + * + * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> + * + * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + */ + +#include <sys/syscall.h> +#include <fcntl.h> +#include <bits/kernel-features.h> +#include <stdint.h> + +#if defined __NR_fallocate +int posix_fallocate(int fd, __off_t offset, __off_t len) +{ + int ret; + +# if __WORDSIZE == 32 + uint32_t off_low = offset; + uint32_t len_low = len; + /* may assert that these >>31 are 0 */ + uint32_t zero = 0; + INTERNAL_SYSCALL_DECL(err); + ret = (int) (INTERNAL_SYSCALL(fallocate, err, 6, fd, 0, + __LONG_LONG_PAIR (zero, off_low), + __LONG_LONG_PAIR (zero, len_low))); +# elif __WORDSIZE == 64 + INTERNAL_SYSCALL_DECL(err); + ret = (int) (INTERNAL_SYSCALL(fallocate, err, 4, fd, 0, offset, len)); +# else +# error your machine is neither 32 bit or 64 bit ... it must be magical +#endif + if (unlikely(INTERNAL_SYSCALL_ERROR_P (ret, err))) + return INTERNAL_SYSCALL_ERRNO (ret, err); + return 0; +} +# if defined __UCLIBC_HAS_LFS__ && __WORDSIZE == 64 +strong_alias(posix_fallocate,posix_fallocate64) +# endif +#endif |