fadvise.1

FADVISE

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXIT STATUS
AUTHORS
SEE ALSO
REPORTING BUGS
AVAILABILITY

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NAME

fadvise − utility to use the posix_fadvise system call

SYNOPSIS

fadvise [−a advice] [−o offset] [−l length] filename

fadvise [−a advice] [−o offset] [−l length] −d file−descriptor

DESCRIPTION

fadvise is a simple command wrapping posix_fadvise(2) system call that is for predeclaring an access pattern for file data.

OPTIONS

−d, −−fd file−descriptor

Apply the advice to the file specified with the file descriptor instead of open a file specified with a file name.

−a, −−advice advice

See the command output with −−help option for available values for advice. If this option is omitted, “dontneed” is used as default advice.

−o, −−offset offset

Specifies the beginning offset of the range, in bytes. If this option is omitted, 0 is used as default advice.

−l, −−length length

Specifies the length of the range, in bytes. If this option is omitted, 0 is used as default advice.

−h, −−help

Display help text and exit.

−V, −−version

Print version and exit.

EXIT STATUS

fadvise has the following exit status values:

0

success

1

unspecified failure

AUTHORS

Masatake YAMATO <yamato@redhat.com>

SEE ALSO

posix_fadvise(2)

REPORTING BUGS

For bug reports, use the issue tracker at <https://github.com/util−linux/util−linux/issues>.

AVAILABILITY

The fadvise command is part of the util−linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util−linux/>.

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