mirror of
https://github.com/hanzoai/visor.git
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Jeremy Maitin-Shepard
3069630751
glibc 2.42 uses TCGETS2 in isatty, and fails to properly detect ttys without TCGETS2 supported. This commit also adds support for passing additional TTY file descriptors (fd numbers > 2) from the host, which is needed by the new host_pty test but may also be independently useful. In line_discipline.go, ensure that termios state is not overwritten on CopyIn failure (e.g. EFAULT). This was reported in review. A regression test is added. Move kernel_termios operators to pty_util for reuse.
92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
// Copyright 2019 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef GVISOR_TEST_UTIL_PTY_UTIL_H_
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#define GVISOR_TEST_UTIL_PTY_UTIL_H_
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#include <termios.h>
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#include <ostream>
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#include "test/util/file_descriptor.h"
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#include "test/util/posix_error.h"
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namespace gvisor {
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namespace testing {
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// Opens the replica end of the passed master as R/W and nonblocking. It does
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// not set the replica as the controlling TTY.
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PosixErrorOr<FileDescriptor> OpenReplica(const FileDescriptor& master);
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// Identical to the above OpenReplica, but flags are all specified by the
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// caller.
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PosixErrorOr<FileDescriptor> OpenReplica(const FileDescriptor& master,
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int flags);
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// Get the number of the replica end of the master.
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PosixErrorOr<int> ReplicaID(const FileDescriptor& master);
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// glibc defines its own, different, version of struct termios. We care about
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// what the kernel does, not glibc.
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#define KERNEL_NCCS 19
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struct kernel_termios {
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tcflag_t c_iflag;
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tcflag_t c_oflag;
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tcflag_t c_cflag;
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tcflag_t c_lflag;
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cc_t c_line;
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cc_t c_cc[KERNEL_NCCS];
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};
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struct kernel_termios2 {
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tcflag_t c_iflag;
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tcflag_t c_oflag;
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tcflag_t c_cflag;
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tcflag_t c_lflag;
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cc_t c_line;
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cc_t c_cc[KERNEL_NCCS];
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speed_t c_ispeed;
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speed_t c_ospeed;
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};
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#ifdef TCGETS2
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#undef TCGETS2
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#endif
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#define TCGETS2 0x802c542a
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#ifdef TCSETS2
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#undef TCSETS2
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#endif
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#define TCSETS2 0x402c542b
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#ifdef TCSETSW2
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#undef TCSETSW2
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#endif
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#define TCSETSW2 0x402c542c
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#ifdef TCSETSF2
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#undef TCSETSF2
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#endif
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#define TCSETSF2 0x402c542d
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bool operator==(struct kernel_termios const& a, struct kernel_termios const& b);
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std::ostream& operator<<(std::ostream& os, struct kernel_termios const& a);
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} // namespace testing
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} // namespace gvisor
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#endif // GVISOR_TEST_UTIL_PTY_UTIL_H_
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