From 20cea82579d482b90bd3db956fb0aecde8fd9fc8 Mon Sep 17 00:00:00 2001 From: apoggiali Date: Fri, 21 Jun 2019 14:57:04 +0200 Subject: [PATCH] Add pthread_getname_np API --- include/pthread.h | 1 + src/thread/pthread_getname_np.c | 27 +++++++++++++++++++++++++++ 2 files changed, 28 insertions(+) create mode 100644 src/thread/pthread_getname_np.c diff --git a/include/pthread.h b/include/pthread.h index e238321b..57fa905c 100644 --- a/include/pthread.h +++ b/include/pthread.h @@ -218,6 +218,7 @@ 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_getname_np(pthread_t, char *, size_t); int pthread_getattr_default_np(pthread_attr_t *); int pthread_setattr_default_np(const pthread_attr_t *); int pthread_tryjoin_np(pthread_t, void **); diff --git a/src/thread/pthread_getname_np.c b/src/thread/pthread_getname_np.c new file mode 100644 index 00000000..3b5584ca --- /dev/null +++ b/src/thread/pthread_getname_np.c @@ -0,0 +1,27 @@ +#define _GNU_SOURCE +#include +#include +#include +#include + +#include "pthread_impl.h" + +int pthread_getname_np(pthread_t thread, char *name, size_t len) +{ + int fd, cs, status = 0; + ssize_t nlen; + char f[sizeof "/proc/self/task//comm" + 3*sizeof(int)]; + + if (len < 16) return ERANGE; + + if (thread == pthread_self()) + return prctl(PR_GET_NAME, (unsigned long)name, 0UL, 0UL, 0UL) ? errno : 0; + + snprintf(f, sizeof f, "/proc/self/task/%d/comm", thread->tid); + pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs); + if ((fd = open(f, O_RDONLY)) < 0 || (nlen =read(fd, name, len)) < 0) status = errno; + if (fd >= 0) close(fd); + pthread_setcancelstate(cs, 0); + name[nlen-1] = '\0'; + return status; +} -- 2.19.1