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//===-- Linux implementation of tcgetattr ---------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/termios/tcgetattr.h"
#include "kernel_termios.h"
#include "src/__support/OSUtil/syscall.h"
#include "src/__support/common.h"
#include "src/__support/libc_errno.h"
#include "src/__support/macros/config.h"
#include <asm/ioctls.h> // Safe to include without the risk of name pollution.
#include <sys/syscall.h> // For syscall numbers
#include <termios.h>
namespace LIBC_NAMESPACE_DECL {
LLVM_LIBC_FUNCTION(int, tcgetattr, (int fd, struct termios *t)) {
LIBC_NAMESPACE::kernel_termios kt;
int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_ioctl, fd, TCGETS, &kt);
if (ret < 0) {
libc_errno = -ret;
return -1;
}
t->c_iflag = kt.c_iflag;
t->c_oflag = kt.c_oflag;
t->c_cflag = kt.c_cflag;
t->c_lflag = kt.c_lflag;
t->c_ispeed = kt.c_cflag & CBAUD;
t->c_ospeed = kt.c_cflag & CBAUD;
size_t nccs = KERNEL_NCCS <= NCCS ? KERNEL_NCCS : NCCS;
for (size_t i = 0; i < nccs; ++i)
t->c_cc[i] = kt.c_cc[i];
if (NCCS > nccs) {
for (size_t i = nccs; i < NCCS; ++i)
t->c_cc[i] = 0;
}
return 0;
}
} // namespace LIBC_NAMESPACE_DECL
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