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7989720175
* doc/posix-functions/posix_fallocate.texi: Mention the glibc efficiency problems and issues with NFS.
30 lines
1.1 KiB
Plaintext
30 lines
1.1 KiB
Plaintext
@node posix_fallocate
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@section @code{posix_fallocate}
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@findex posix_fallocate
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/posix_fallocate.html}
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Gnulib module: ---
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Portability problems fixed by Gnulib:
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@itemize
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@item
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This function is missing on some platforms:
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Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11,
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IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x, mingw, MSVC 9, Interix 3.5, BeOS.
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@item
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POSIX specifies that EINVAL should be returned when the file system doesn't
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support the allocation operation directly. glibc however emulates the file system
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allocation with writes where unsupported, and apps have depended on
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that long term implementation. This is both inefficient, and as of
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glibc 2.21 at least, buggy on certain NFS setups.
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@item
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On platforms where @code{off_t} is a 32-bit type, this function may not
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work correctly across the entire data range of files larger than 2 GB.
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The fix is to use the @code{AC_SYS_LARGEFILE} macro.
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@end itemize
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