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				.\" Copyright (c) 2016 The FreeBSD Foundation, Inc.
				.\" All rights reserved.
				.\"
				.\" This documentation was written by
				.\" Konstantin Belousov <kib@FreeBSD.org> under sponsorship
				.\" from the FreeBSD Foundation.
				.\"
				.\" Redistribution and use in source and binary forms, with or without
				.\" modification, are permitted provided that the following conditions
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				.\" notice, this list of conditions and the following disclaimer.
				.\" 2. Redistributions in binary form must reproduce the above copyright
				.\" notice, this list of conditions and the following disclaimer in the
				.\" documentation and/or other materials provided with the distribution.
				.\"
				.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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				.\" $FreeBSD$
				.\"
				.Dd May 5, 2016
				.Dt THR_SET_NAME 2
				.Os
				.Sh NAME
				.Nm thr_set_name
				.Nd set user-visible thread name
				.Sh LIBRARY
				.Lb libc
				.Sh SYNOPSIS
				.In sys/thr.h
				.Ft int
				.Fn thr_set_name "long id" "const char *name"
				.Sh DESCRIPTION
				The
				.Fn thr_set_name
				sets the user-visible name for the kernel thread with the identifier
				.Va id
				in the current process, to the NULL-terminated string
				.Va name .
				The thread name can be seen in the output of the
				.Xr ps 1
				and
				.Xr top 1
				commands, in the kernel debuggers and kernel tracing facility outputs,
				also in userland debuggers and program core files, as notes.
				.Sh RETURN VALUES
				If successful,
				.Fn thr_set_name
				will return zero, otherwise \-1 is returned, and
				.Va errno
				is set to indicate the error.
				.Sh ERRORS
				The
				.Fn thr_set_name
				operation may return the following errors:
				.Bl -tag -width Er
				.It Bq Er EFAULT
				The memory pointed to by the
				.Fa name
				argument is not valid.
				.It Bq Er ENAMETOOLONG
				The string pointed to by the
				.Fa name
				argument exceeds
				.Dv MAXCOMLEN + 1
				bytes in length.
				.It Bq Er ESRCH
				The thread with the identifier
				.Fa id
				does not exist in the current process.
				.El
				.Sh SEE ALSO
				.Xr ps 1 ,
				.Xr thr_exit 2 ,
				.Xr thr_kill 2 ,
				.Xr thr_kill2 2 ,
				.Xr thr_new 2 ,
				.Xr thr_self 2 ,
				.Xr _umtx_op 2 ,
				.Xr ddb 4 ,
				.Xr ktr 9
				.Sh STANDARDS
				The
				.Fn thr_new
				system call is non-standard and is used by the
				.Lb libthr .