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Kevin KrakauerandgVisor bot
220cfabaa0
Adresses a deadlock with the rolled back change: https://github.com/google/gvisor/commit/e72cf7af1fcbef3d9fb9bf102435bb36dd302a63 Creating a session from an orphaned process group was causing a lock to be acquired twice by a single goroutine. This behavior is addressed, and a test (OrphanRegression) has been added to pty.cc. Implemented the following ioctls: - TIOCSCTTY - set controlling TTY - TIOCNOTTY - remove controlling tty, maybe signal some other processes - TIOCGPGRP - get foreground process group. Also enables tcgetpgrp(). - TIOCSPGRP - set foreground process group. Also enabled tcsetpgrp(). Next steps are to actually turn terminal-generated control characters (e.g. C^c) into signals to the proper process groups, and to send SIGTTOU and SIGTTIN when appropriate. PiperOrigin-RevId: 270088599
29 lines
837 B
Go
29 lines
837 B
Go
// Copyright 2018 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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package kernel
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import "sync"
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// TTY defines the relationship between a thread group and its controlling
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// terminal.
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//
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// +stateify savable
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type TTY struct {
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mu sync.Mutex `state:"nosave"`
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// tg is protected by mu.
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tg *ThreadGroup
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}
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