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55 lines
2 KiB
Diff
55 lines
2 KiB
Diff
From bd3b9c4ca5e93f10f7fd891b8c07cc0c5dfd198f Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?=C3=89rico=20Rolim?= <ericonr@disroot.org>
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Date: Tue, 20 Apr 2021 16:15:15 -0300
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Subject: [PATCH] add pthread_getname_np function
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based on the pthread_setname_np implementation
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---
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include/pthread.h | 1 +
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src/thread/pthread_getname_np.c | 25 +++++++++++++++++++++++++
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2 files changed, 26 insertions(+)
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create mode 100644 src/thread/pthread_getname_np.c
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diff --git a/include/pthread.h b/include/pthread.h
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index 0492f26a6..89fd9ff7c 100644
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--- a/include/pthread.h
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+++ b/include/pthread.h
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@@ -221,6 +221,7 @@ int pthread_getaffinity_np(pthread_t, size_t, struct cpu_set_t *);
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int pthread_setaffinity_np(pthread_t, size_t, const struct cpu_set_t *);
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int pthread_getattr_np(pthread_t, pthread_attr_t *);
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int pthread_setname_np(pthread_t, const char *);
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+int pthread_getname_np(pthread_t, char *, size_t);
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int pthread_getattr_default_np(pthread_attr_t *);
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int pthread_setattr_default_np(const pthread_attr_t *);
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int pthread_tryjoin_np(pthread_t, void **);
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diff --git a/src/thread/pthread_getname_np.c b/src/thread/pthread_getname_np.c
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new file mode 100644
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index 000000000..48d1a294f
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--- /dev/null
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+++ b/src/thread/pthread_getname_np.c
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@@ -0,0 +1,25 @@
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+#define _GNU_SOURCE
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+#include <fcntl.h>
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+#include <unistd.h>
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+#include <sys/prctl.h>
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+
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+#include "pthread_impl.h"
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+
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+int pthread_getname_np(pthread_t thread, char *name, size_t len)
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+{
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+ int fd, cs, status = 0;
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+ char f[sizeof "/proc/self/task//comm" + 3*sizeof(int)];
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+
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+ if (len < 16) return ERANGE;
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+
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+ if (thread == pthread_self())
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+ return prctl(PR_GET_NAME, (unsigned long)name, 0UL, 0UL, 0UL) ? errno : 0;
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+
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+ snprintf(f, sizeof f, "/proc/self/task/%d/comm", thread->tid);
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+ pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
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+ if ((fd = open(f, O_RDONLY|O_CLOEXEC)) < 0 || (len = read(fd, name, len)) < 0) status = errno;
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+ else name[len-1] = 0; /* remove trailing new line only if successful */
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+ if (fd >= 0) close(fd);
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+ pthread_setcancelstate(cs, 0);
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+ return status;
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+}
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