src/third_party/musl/src/misc/ptsname.c

#include <stdlib.h>
#include <errno.h>

int __ptsname_r(int, char *, size_t);

char *ptsname(int fd)
{
	static char buf[9 + sizeof(int)*3 + 1];
	int err = __ptsname_r(fd, buf, sizeof buf);
	if (err) {
		errno = err;
		return 0;
	}
	return buf;
}