47 lines
2.5 KiB
C
47 lines
2.5 KiB
C
/*-*- 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;
|
|
}
|
|
}
|