posix_fallocate(3)         Library Functions Manual         posix_fallocate(3)

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       posix_fallocate - <?><?><?><?><?><?><?><?>
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       Standard C library (libc, -lc)

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       #include <fcntl.h>

       int posix_fallocate(int fd, off_t offset, off_t size);

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   (<?><?>. feature_test_macros(7)):

       posix_fallocate():
           _POSIX_C_SOURCE >= 200112L

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       The function posix_fallocate()  ensures that disk space is allocated
       for the file referred to by the file descriptor fd for the bytes in the
       range starting at offset and continuing for size bytes.  After a
       successful call to posix_fallocate(), subsequent writes to bytes in the
       specified range are guaranteed not to fail because of lack of disk
       space.

       If the size of the file is less than offset+size, then the file is
       increased to this size; otherwise the file size is left unchanged.

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       EBADF  fd <?><?> <?><?><?><?><?><?><?><?>
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       EFBIG  offset+size exceeds the maximum file size.

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       EINVAL offset was less than 0, or size was less than or equal to 0, or
              the underlying filesystem does not support the operation.

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       EOPNOTSUPP
              The filesystem containing the file referred to by fd does not
              support this operation.  This error code can be returned by C
              libraries that don't perform the emulation shown in CAVEATS,
              such as musl libc.

       ESPIPE <?><?><?><?><?><?><?><?> fd <?><?><?><?><?><?><?><?><?> <?><?>
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       +----------------------------+----------------------------------------------------------+--------------------------+
       |<?><?><?><?><?><?><?><?><?> | <?><?><?><?><?><?><?>                                    | <?><?><?><?><?><?><?><?> |
       +----------------------------+----------------------------------------------------------+--------------------------+
       |posix_fallocate()           | <?><?><?><?><?><?><?><?><?><?><?><?> <?> <?><?><?><?><?> | MT-Safe (but see         |
       |                            |                                                          | CAVEATS)                 |
       +----------------------------+----------------------------------------------------------+--------------------------+
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       POSIX.1-2008.

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       glibc 2.1.94.  POSIX.1-2001

       POSIX.1-2008 says that an implementation shall give the EINVAL error if
       size was 0, or offset was less than 0.  POSIX.1-2001 says that an
       implementation shall give the EINVAL error if size is less than 0, or
       offset was less than 0, and may give the error if size equals zero.

CAVEATS
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       fallocate(1), fallocate(2), lseek(2), posix_fadvise(2)

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       <?><?><?><?><?><?><?><?><?><?>(<?>) Alexey, Azamat Hackimov
       <azamat.hackimov@gmail.com>, kogamatranslator49 <r.podarov@yandex.ru>,
       Darima Kogan <silverdk99@gmail.com>, Max Is <ismax799@gmail.com>, Yuri
       Kozlov <yuray@komyakino.ru>, <?><?><?><?> <?><?><?><?><?><?>
       <pavia00@gmail.com> <?> Kirill Rekhov <krekhov.dev@gmail.com>

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       <?><?><?><?><?><?><?><?> GNU (GNU General Public License - GPL,
       <https://www.gnu.org/licenses/gpl-3.0.html> <?><?><?><?><?><?> 3
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       <<debian-l10n-russian@lists.debian.org>>.

Linux man-pages 6.12    17 <?><?><?><?><?><?> 2024 <?>.     posix_fallocate(3)