diff options
| author | Anthony G. Basile <blueness@gentoo.org> | 2014-09-07 15:33:46 -0400 |
|---|---|---|
| committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2014-09-09 13:48:45 +0200 |
| commit | 33a12b5540b8abbc4ee0ecb3a51912b3c7868517 (patch) | |
| tree | 399a161fa8ae09eab39c25f17686c496a05b9b2b /libc/sysdeps/linux/common/posix_fallocate.c | |
| parent | 7efe10ec5fc772f5328b35ba6716bde815212b45 (diff) | |
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 <blueness@gentoo.org>
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 | 22 |
1 files changed, 2 insertions, 20 deletions
diff --git a/libc/sysdeps/linux/common/posix_fallocate.c b/libc/sysdeps/linux/common/posix_fallocate.c index 9aaa6ce15..76771e353 100644 --- a/libc/sysdeps/linux/common/posix_fallocate.c +++ b/libc/sysdeps/linux/common/posix_fallocate.c @@ -14,28 +14,10 @@ #include <stdint.h> #if defined __NR_fallocate +extern __typeof(fallocate) __libc_fallocate attribute_hidden; 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; + return __libc_fallocate(fd, 0, offset, len); } # if defined __UCLIBC_HAS_LFS__ && __WORDSIZE == 64 strong_alias(posix_fallocate,posix_fallocate64) |