2024-10-04 21:20:52 +02:00
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// Copyright 2024, Command Line Inc.
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// SPDX-License-Identifier: Apache-2.0
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//go:build !windows
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package wavebase
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import (
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"log"
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"os"
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"path/filepath"
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"golang.org/x/sys/unix"
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)
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func AcquireWaveLock() (FDLock, error) {
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Update data and config paths to match platform defaults (#1047)
Going forward for new installations, config and data files will be
stored at the platform default paths, as defined by
[env-paths](https://www.npmjs.com/package/env-paths).
For backwards compatibility, if the `~/.waveterm` or `WAVETERM_HOME`
directory exists and contains valid data, it will be used. If this check
fails, then `WAVETERM_DATA_HOME` and `WAVETERM_CONFIG_HOME` will be
used. If these are not defined, then `XDG_DATA_HOME` and
`XDG_CONFIG_HOME` will be used. Finally, if none of these are defined,
the [env-paths](https://www.npmjs.com/package/env-paths) defaults will
be used.
As with the existing app, dev instances will write to `waveterm-dev`
directories, while all others will write to `waveterm`.
2024-10-22 18:26:58 +02:00
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dataHomeDir := GetWaveDataDir()
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lockFileName := filepath.Join(dataHomeDir, WaveLockFile)
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2024-10-04 21:20:52 +02:00
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log.Printf("[base] acquiring lock on %s\n", lockFileName)
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fd, err := os.OpenFile(lockFileName, os.O_RDWR|os.O_CREATE, 0600)
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if err != nil {
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return nil, err
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}
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err = unix.Flock(int(fd.Fd()), unix.LOCK_EX|unix.LOCK_NB)
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if err != nil {
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fd.Close()
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return nil, err
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}
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return fd, nil
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}
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