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/* pthread_getname_np.
Copyright (C) 2024-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <hurd.h>
#include <mach_debug/mach_debug_types.h>
#include <pthread.h>
#include <pthreadP.h>
#include <string.h>
#include <pt-internal.h>
int
__pthread_getname_np (pthread_t thread, char *buf, size_t len)
{
#ifdef HAVE_MACH_THREAD_GET_NAME
/* GNU Mach doesn't export this so we have to define it ourselves. */
#define MACH_THREAD_NAME_MAX 32
struct __pthread *pthread;
error_t err;
kernel_debug_name_t tmp;
/* Note that we don't check for len to be MACH_THREAD_NAME_MAX
* since we want to be more compatible with the Linux API which
* requires that the buffer is at least 16 bytes long.
*
* We check for at least 1 byte since we truncate the result below. */
if (len < 1)
return ERANGE;
if (len > MACH_THREAD_NAME_MAX)
len = MACH_THREAD_NAME_MAX;
/* Lookup the thread structure for THREAD. */
pthread = __pthread_getid (thread);
if (pthread == NULL)
return ESRCH;
/* __thread_get_name expects a buffer of size sizeof (kernel_debug_name_t)
* and anything smaller will overflow. */
err = __thread_get_name (pthread->kernel_thread, tmp);
if (err != KERN_SUCCESS)
return __hurd_fail (err);
/* Truncate the source name to fit in the destination buffer. */
tmp[len - 1] = '\0';
memcpy (buf, tmp, len);
return 0;
#else
return ENOTSUP;
#endif
}
weak_alias (__pthread_getname_np, pthread_getname_np)
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