diff options
Diffstat (limited to 'io.c')
-rw-r--r-- | io.c | 12 |
1 files changed, 10 insertions, 2 deletions
@@ -193,14 +193,22 @@ static rb_atomic_t max_file_descriptor = NOFILE; void rb_update_max_fd(int fd) { - struct stat buf; rb_atomic_t afd = (rb_atomic_t)fd; rb_atomic_t max_fd = max_file_descriptor; + int err; if (afd <= max_fd) return; - if (fstat(fd, &buf) != 0 && errno == EBADF) { +#if defined(HAVE_FCNTL) && defined(F_GETFL) + err = fcntl(fd, F_GETFL) == -1; +#else + { + struct stat buf; + err = fstat(fd, &buf) != 0; + } +#endif + if (err && errno == EBADF) { rb_bug("rb_update_max_fd: invalid fd (%d) given.", fd); } |