/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│ │vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│ ╞══════════════════════════════════════════════════════════════════════════════╡ │ Copyright 2020 Justine Alexandra Roberts Tunney │ │ │ │ This program is free software; you can redistribute it and/or modify │ │ it under the terms of the GNU General Public License as published by │ │ the Free Software Foundation; version 2 of the License. │ │ │ │ This program is distributed in the hope that it will be useful, but │ │ WITHOUT ANY WARRANTY; without even the implied warranty of │ │ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │ │ General Public License for more details. │ │ │ │ You should have received a copy of the GNU General Public License │ │ along with this program; if not, write to the Free Software │ │ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │ │ 02110-1301 USA │ ╚─────────────────────────────────────────────────────────────────────────────*/ #include "libc/calls/calls.h" #include "libc/calls/internal.h" #include "libc/calls/struct/stat.h" #include "libc/dce.h" #include "libc/errno.h" #include "libc/nt/enum/filetype.h" #include "libc/nt/files.h" /** * Returns true if file descriptor is backed by character i/o. */ textstartup bool32 ischardev(int fd) { int olderr; struct stat st; if (!IsWindows()) { olderr = errno; if (fstat$sysv(fd, &st) != -1) { return S_ISCHR(st.st_mode); } else { errno = olderr; return false; } } else { return isfdkind(fd, kFdFile) && GetFileType(g_fds.p[fd].handle) == kNtFileTypeChar; } }