third_party/ulib/musl/src/unistd/ttyname.c

#include <errno.h>
#include <limits.h>
#include <unistd.h>

char* ttyname(int fd) {
    static char buf[TTY_NAME_MAX];
    int result;
    if ((result = ttyname_r(fd, buf, sizeof buf))) {
        errno = result;
        return NULL;
    }
    return buf;
}