mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/* pthread_setname_np -- Set thread name. Linux version
|
|
Copyright (C) 2010-2016 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; see the file COPYING.LIB. If
|
|
not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <pthreadP.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sys/prctl.h>
|
|
|
|
#include <not-cancel.h>
|
|
|
|
|
|
int
|
|
pthread_setname_np (pthread_t th, const char *name)
|
|
{
|
|
const struct pthread *pd = (const struct pthread *) th;
|
|
|
|
/* Unfortunately the kernel headers do not export the TASK_COMM_LEN
|
|
macro. So we have to define it here. */
|
|
#define TASK_COMM_LEN 16
|
|
size_t name_len = strlen (name);
|
|
if (name_len >= TASK_COMM_LEN)
|
|
return ERANGE;
|
|
|
|
if (pd == THREAD_SELF)
|
|
return prctl (PR_SET_NAME, name) ? errno : 0;
|
|
|
|
#define FMT "/proc/self/task/%u/comm"
|
|
char fname[sizeof (FMT) + 8];
|
|
sprintf (fname, FMT, (unsigned int) pd->tid);
|
|
|
|
int fd = open_not_cancel_2 (fname, O_RDWR);
|
|
if (fd == -1)
|
|
return errno;
|
|
|
|
int res = 0;
|
|
ssize_t n = TEMP_FAILURE_RETRY (write_not_cancel (fd, name, name_len));
|
|
if (n < 0)
|
|
res = errno;
|
|
else if (n != name_len)
|
|
res = EIO;
|
|
|
|
close_not_cancel_no_status (fd);
|
|
|
|
return res;
|
|
}
|