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 /include | |
| 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 'include')
| -rw-r--r-- | include/fcntl.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/fcntl.h b/include/fcntl.h index c749ad552..04fc2c06d 100644 --- a/include/fcntl.h +++ b/include/fcntl.h @@ -239,6 +239,38 @@ extern int posix_fallocate64 (int __fd, __off64_t __offset, __off64_t __len); # endif #endif +#if (defined __UCLIBC_LINUX_SPECIFIC__ && defined __USE_GNU) || defined _LIBC +/* Reserve storage for the data of a file associated with FD. This function + is Linux-specific. For the portable version, use posix_fallocate(). + Unlike the latter, fallocate can operate in different modes. The default + mode = 0 is equivalent to posix_fallocate(). + + Note: These declarations are used in posix_fallocate.c and + posix_fallocate64.c, so we expose them internally. + */ + +/* Flags for fallocate's mode. */ +# define FALLOC_FL_KEEP_SIZE 1 /* Don't extend size of file + even if offset + len is + greater than file size. */ +# define FALLOC_FL_PUNCH_HOLE 2 /* Create a hole in the file. */ + +# ifndef __USE_FILE_OFFSET64 +extern int fallocate (int __fd, int __mode, __off_t __offset, __off_t __len); +# else +# ifdef __REDIRECT +extern int __REDIRECT (fallocate, (int __fd, int __mode, __off64_t __offset, + __off64_t __len), + fallocate64); +# else +# define fallocate fallocate64 +# endif +# endif +# ifdef __USE_LARGEFILE64 +extern int fallocate64 (int __fd, int __mode, __off64_t __offset, __off64_t __len); +# endif +#endif + __END_DECLS #endif /* fcntl.h */ |