diff options
Diffstat (limited to 'libc/sysdeps/linux/common/fallocate.c')
| -rw-r--r-- | libc/sysdeps/linux/common/fallocate.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/fallocate.c b/libc/sysdeps/linux/common/fallocate.c new file mode 100644 index 000000000..b23122669 --- /dev/null +++ b/libc/sysdeps/linux/common/fallocate.c @@ -0,0 +1,48 @@ +/* vi: set sw=4 ts=4: */ +/* + * fallocate() for uClibc - Based off of posix_fallocate() by Erik Andersen + * 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 +extern __typeof(fallocate) __libc_fallocate attribute_hidden; +int attribute_hidden __libc_fallocate(int fd, int mode, __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, mode, + __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, mode, 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_LINUX_SPECIFIC__ && defined __USE_GNU +strong_alias(__libc_fallocate,fallocate) +# if __WORDSIZE == 64 +strong_alias(__libc_fallocate,fallocate64) +# endif +# endif +#endif |