1*c9945492SAndroid Build Coastguard Worker #define _GNU_SOURCE
2*c9945492SAndroid Build Coastguard Worker #include <fcntl.h>
3*c9945492SAndroid Build Coastguard Worker #include <unistd.h>
4*c9945492SAndroid Build Coastguard Worker #include <sys/prctl.h>
5*c9945492SAndroid Build Coastguard Worker
6*c9945492SAndroid Build Coastguard Worker #include "pthread_impl.h"
7*c9945492SAndroid Build Coastguard Worker
pthread_getname_np(pthread_t thread,char * name,size_t len)8*c9945492SAndroid Build Coastguard Worker int pthread_getname_np(pthread_t thread, char *name, size_t len)
9*c9945492SAndroid Build Coastguard Worker {
10*c9945492SAndroid Build Coastguard Worker int fd, cs, status = 0;
11*c9945492SAndroid Build Coastguard Worker char f[sizeof "/proc/self/task//comm" + 3*sizeof(int)];
12*c9945492SAndroid Build Coastguard Worker
13*c9945492SAndroid Build Coastguard Worker if (len < 16) return ERANGE;
14*c9945492SAndroid Build Coastguard Worker
15*c9945492SAndroid Build Coastguard Worker if (thread == pthread_self())
16*c9945492SAndroid Build Coastguard Worker return prctl(PR_GET_NAME, (unsigned long)name, 0UL, 0UL, 0UL) ? errno : 0;
17*c9945492SAndroid Build Coastguard Worker
18*c9945492SAndroid Build Coastguard Worker snprintf(f, sizeof f, "/proc/self/task/%d/comm", thread->tid);
19*c9945492SAndroid Build Coastguard Worker pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
20*c9945492SAndroid Build Coastguard Worker if ((fd = open(f, O_RDONLY|O_CLOEXEC)) < 0 || (len = read(fd, name, len)) == -1) status = errno;
21*c9945492SAndroid Build Coastguard Worker else name[len-1] = 0; /* remove trailing new line only if successful */
22*c9945492SAndroid Build Coastguard Worker if (fd >= 0) close(fd);
23*c9945492SAndroid Build Coastguard Worker pthread_setcancelstate(cs, 0);
24*c9945492SAndroid Build Coastguard Worker return status;
25*c9945492SAndroid Build Coastguard Worker }
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