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auditbeat: Split common tty definitions (elastic#42004)
No functional changes, just move tty things to a common place so that the upcoming system/process provider can use it. Last of the PRs to split common code for the new system/process provider (I promise).
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| // Licensed to Elasticsearch B.V. under one or more contributor | ||
| // license agreements. See the NOTICE file distributed with | ||
| // this work for additional information regarding copyright | ||
| // ownership. Elasticsearch B.V. licenses this file to you under | ||
| // the Apache License, Version 2.0 (the "License"); you may | ||
| // not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, | ||
| // software distributed under the License is distributed on an | ||
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| // KIND, either express or implied. See the License for the | ||
| // specific language governing permissions and limitations | ||
| // under the License. | ||
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| package tty | ||
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| type TTYType int | ||
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| const ( | ||
| TTYUnknown TTYType = iota | ||
| Pts | ||
| TTY | ||
| TTYConsole | ||
| ) | ||
|
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| const ( | ||
| ptsMinMajor = 136 | ||
| ptsMaxMajor = 143 | ||
| ttyMajor = 4 | ||
| consoleMaxMinor = 63 | ||
| ttyMaxMinor = 255 | ||
| ) | ||
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| type TTYDev struct { | ||
| Minor uint32 | ||
| Major uint32 | ||
| Winsize TTYWinsize | ||
| Termios TTYTermios | ||
| } | ||
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| type TTYWinsize struct { | ||
| Rows uint16 | ||
| Cols uint16 | ||
| } | ||
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| type TTYTermios struct { | ||
| CIflag uint32 | ||
| COflag uint32 | ||
| CLflag uint32 | ||
| CCflag uint32 | ||
| } | ||
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| // interactiveFromTTY returns if this is an interactive tty device. | ||
| func InteractiveFromTTY(tty TTYDev) bool { | ||
| return TTYUnknown != GetTTYType(tty.Major, tty.Minor) | ||
| } | ||
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| // getTTYType returns the type of a TTY device based on its major and minor numbers. | ||
| func GetTTYType(major uint32, minor uint32) TTYType { | ||
| if major >= ptsMinMajor && major <= ptsMaxMajor { | ||
| return Pts | ||
| } | ||
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| if ttyMajor == major { | ||
| if minor <= consoleMaxMinor { | ||
| return TTYConsole | ||
| } else if minor > consoleMaxMinor && minor <= ttyMaxMinor { | ||
| return TTY | ||
| } | ||
| } | ||
|
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| return TTYUnknown | ||
| } |
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