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Diffstat (limited to 'libpthread/nptl/pthread_getname.c')
-rw-r--r--libpthread/nptl/pthread_getname.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/libpthread/nptl/pthread_getname.c b/libpthread/nptl/pthread_getname.c
new file mode 100644
index 000000000..862c8c7ec
--- /dev/null
+++ b/libpthread/nptl/pthread_getname.c
@@ -0,0 +1,69 @@
+/* pthread_getname_np -- Get 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_getname_np (pthread_t th, char *buf, size_t len)
+{
+ 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
+ if (len < TASK_COMM_LEN)
+ return ERANGE;
+
+ if (pd == THREAD_SELF)
+ return prctl (PR_GET_NAME, buf) ? 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_RDONLY);
+ if (fd == -1)
+ return errno;
+
+ int res = 0;
+ ssize_t n = TEMP_FAILURE_RETRY (read_not_cancel (fd, buf, len));
+ if (n < 0)
+ res = errno;
+ else
+ {
+ if (buf[n - 1] == '\n')
+ buf[n - 1] = '\0';
+ else if (n == len)
+ res = ERANGE;
+ else
+ buf[n] = '\0';
+ }
+
+ close_not_cancel_no_status (fd);
+
+ return res;
+}