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 9int 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); 22 if ((fd = open(f, O_WRONLY)) < 0 || write(fd, name, len) < 0) status = errno; 23 if (fd >= 0) close(fd); 24 pthread_setcancelstate(cs, 0); 25 return status; 26} 27