.\" Copyright, the authors of the Linux man-pages project
.\"
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.TH PR_GET_IO_FLUSHER 2const 2025-05-17 "Linux man-pages 6.16"
.SH NAME
PR_GET_IO_FLUSHER
\-
get the IO_FLUSHER state
.SH LIBRARY
Standard C library
.RI ( libc ,\~ \-lc )
.SH SYNOPSIS
.nf
.BR "#include <linux/prctl.h>" "  /* Definition of " PR_* " constants */"
.B #include <sys/prctl.h>
.P
.B int prctl(PR_GET_IO_FLUSHER, 0L, 0L, 0L, 0L);
.fi
.SH DESCRIPTION
Return the IO_FLUSHER state of the caller.
A value of 1 indicates that the caller is in the IO_FLUSHER state;
0 indicates that the caller is not in the IO_FLUSHER state.
.P
The calling process must have the
.B CAP_SYS_RESOURCE
capability.
.SH RETURN VALUE
On success,
this call
returns the boolean value described above.
On error, \-1 is returned, and
.I errno
is set to indicate the error.
.SH STANDARDS
Linux.
.SH HISTORY
Linux 5.6.
.SH SEE ALSO
.BR prctl (2),
.BR PR_SET_IO_FLUSHER (2const)