[wasi-libc.git] / libc-top-half / musl / src / thread / pthread_setname_np.c

#define _GNU_SOURCE
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <sys/prctl.h>

#include "pthread_impl.h"

int pthread_setname_np(pthread_t thread, const char *name)
{
	int fd, cs, status = 0;
	char f[sizeof "/proc/self/task//comm" + 3*sizeof(int)];
	size_t len;

	if ((len = strnlen(name, 16)) > 15) return ERANGE;

	if (thread == pthread_self())
		return prctl(PR_SET_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_WRONLY|O_CLOEXEC)) < 0 || write(fd, name, len) < 0) status = errno;
	if (fd >= 0) close(fd);
	pthread_setcancelstate(cs, 0);
	return status;
}
Commit	Line	Data
320054e8 DG	1	#define _GNU_SOURCE
	2	#include <fcntl.h>
	3	#include <string.h>
	4	#include <unistd.h>
	5	#include <sys/prctl.h>
	6
	7	#include "pthread_impl.h"
	8
	9	int pthread_setname_np(pthread_t thread, const char *name)
	10	{
	11	int fd, cs, status = 0;
	12	char f[sizeof "/proc/self/task//comm" + 3*sizeof(int)];
	13	size_t len;
	14
	15	if ((len = strnlen(name, 16)) > 15) return ERANGE;
	16
	17	if (thread == pthread_self())
	18	return prctl(PR_SET_NAME, (unsigned long)name, 0UL, 0UL, 0UL) ? errno : 0;
	19
	20	snprintf(f, sizeof f, "/proc/self/task/%d/comm", thread->tid);
	21	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
5d8a1409	22	if ((fd = open(f, O_WRONLY\|O_CLOEXEC)) < 0 \|\| write(fd, name, len) < 0) status = errno;
320054e8 DG	23	if (fd >= 0) close(fd);
	24	pthread_setcancelstate(cs, 0);
	25	return status;
	26	}