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Date: Wed, 14 Sep 2016 23:02:16 -0400
From: Felix Janda <felix.janda@...teo.de>
To: musl@...ts.openwall.com
Subject: [PATCH RFC] add pthread_setname_np
gdb's "info threads" displays the thread name.
---
Should this function care about interrupted syscalls?
---
include/pthread.h | 1 +
src/thread/pthread_setname_np.c | 21 +++++++++++++++++++++
2 files changed, 22 insertions(+)
create mode 100644 src/thread/pthread_setname_np.c
diff --git a/include/pthread.h b/include/pthread.h
index 3d2e0c4..94ef919 100644
--- a/include/pthread.h
+++ b/include/pthread.h
@@ -214,6 +214,7 @@ struct cpu_set_t;
int pthread_getaffinity_np(pthread_t, size_t, struct cpu_set_t *);
int pthread_setaffinity_np(pthread_t, size_t, const struct cpu_set_t *);
int pthread_getattr_np(pthread_t, pthread_attr_t *);
+int pthread_setname_np(pthread_t, const char *);
int pthread_tryjoin_np(pthread_t, void **);
int pthread_timedjoin_np(pthread_t, void **, const struct timespec *);
#endif
diff --git a/src/thread/pthread_setname_np.c b/src/thread/pthread_setname_np.c
new file mode 100644
index 0000000..b7f7a4b
--- /dev/null
+++ b/src/thread/pthread_setname_np.c
@@ -0,0 +1,21 @@
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "pthread_impl.h"
+
+int pthread_setname_np(pthread_t thread, const char *name)
+{
+ int fd, status = 0;
+ char f[sizeof "/proc/self/task//comm" + 7];
+ ssize_t len;
+
+ if ((len = strlen(name)) > 15) return ERANGE;
+
+ snprintf(f, sizeof f, "/proc/self/task/%d/comm", thread->tid);
+ if ((fd = open(f, O_WRONLY)) < 0) return errno;
+ if (write(fd, name, len) < 0) status = errno;
+
+ close(fd);
+ return status;
+}
--
2.7.3
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