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THR_SET_NAME(2) FreeBSD System Calls Manual THR_SET_NAME(2)
NAME
thr_set_name - set user-visible thread name
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/thr.h>
int
thr_set_name(long id, const char *name);
DESCRIPTION
The thr_set_name() system call sets the user-visible name for the thread
with the identifier id in the current process to the NUL-terminated
string name. The name will be silently truncated to fit into a buffer of
MAXCOMLEN + 1 bytes. The thread name can be seen in the output of the
ps(1) and top(1) commands, in the kernel debuggers and kernel tracing
facility outputs, and in userland debuggers and program core files, as
notes.
RETURN VALUES
If successful, thr_set_name() returns zero; otherwise, -1 is returned,
and errno is set to indicate the error.
ERRORS
The thr_set_name() system call may return the following errors:
[EFAULT] The memory pointed to by the name argument is not
valid.
[ESRCH] The thread with the identifier id does not exist in
the current process.
SEE ALSO
ps(1), _umtx_op(2), thr_exit(2), thr_kill(2), thr_kill2(2), thr_new(2),
thr_self(2), pthread_set_name_np(3), ddb(4), ktr(9)
STANDARDS
The thr_set_name() system call is non-standard and is used by the 1:1
Threading Library (libthr, -lthr).
HISTORY
The thr_set_name() system call first appeared in FreeBSD 5.2.
FreeBSD 14.0-RELEASE-p6 May 5, 2020 FreeBSD 14.0-RELEASE-p6