Ophestra
9e48d7f562
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This change also moves pd behaviour to cmd/hakurei, as this does not belong in the hst API. Signed-off-by: Ophestra <cat@gensokyo.uk>
98 lines
3.1 KiB
Go
98 lines
3.1 KiB
Go
package app
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import (
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"io"
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"io/fs"
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"log"
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"os"
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"os/exec"
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"os/user"
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"path/filepath"
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"hakurei.app/container"
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"hakurei.app/internal"
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)
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// osFile represents [os.File].
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type osFile interface {
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Name() string
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io.Writer
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fs.File
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}
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// syscallDispatcher provides methods that make state-dependent system calls as part of their behaviour.
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type syscallDispatcher interface {
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// new starts a goroutine with a new instance of syscallDispatcher.
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// A syscallDispatcher must never be used in any goroutine other than the one owning it,
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// just synchronising access is not enough, as this is for test instrumentation.
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new(f func(k syscallDispatcher))
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// getuid provides [os.Getuid].
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getuid() int
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// getgid provides [os.Getgid].
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getgid() int
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// lookupEnv provides [os.LookupEnv].
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lookupEnv(key string) (string, bool)
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// stat provides [os.Stat].
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stat(name string) (os.FileInfo, error)
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// open provides [os.Open].
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open(name string) (osFile, error)
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// readdir provides [os.ReadDir].
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readdir(name string) ([]os.DirEntry, error)
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// tempdir provides [os.TempDir].
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tempdir() string
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// evalSymlinks provides [filepath.EvalSymlinks].
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evalSymlinks(path string) (string, error)
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// lookupGroupId calls [user.LookupGroup] and returns the Gid field of the resulting [user.Group] struct.
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lookupGroupId(name string) (string, error)
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// cmdOutput provides the Output method of [exec.Cmd].
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cmdOutput(cmd *exec.Cmd) ([]byte, error)
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// overflowUid provides [container.OverflowUid].
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overflowUid(msg container.Msg) int
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// overflowGid provides [container.OverflowGid].
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overflowGid(msg container.Msg) int
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// mustHsuPath provides [internal.MustHsuPath].
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mustHsuPath() *container.Absolute
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// fatalf provides [log.Fatalf].
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fatalf(format string, v ...any)
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}
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// direct implements syscallDispatcher on the current kernel.
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type direct struct{}
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func (k direct) new(f func(k syscallDispatcher)) { go f(k) }
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func (direct) getuid() int { return os.Getuid() }
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func (direct) getgid() int { return os.Getgid() }
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func (direct) lookupEnv(key string) (string, bool) { return os.LookupEnv(key) }
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func (direct) stat(name string) (os.FileInfo, error) { return os.Stat(name) }
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func (direct) open(name string) (osFile, error) { return os.Open(name) }
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func (direct) readdir(name string) ([]os.DirEntry, error) { return os.ReadDir(name) }
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func (direct) tempdir() string { return os.TempDir() }
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func (direct) evalSymlinks(path string) (string, error) { return filepath.EvalSymlinks(path) }
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func (direct) lookupGroupId(name string) (gid string, err error) {
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var group *user.Group
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group, err = user.LookupGroup(name)
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if group != nil {
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gid = group.Gid
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}
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return
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}
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func (direct) cmdOutput(cmd *exec.Cmd) ([]byte, error) { return cmd.Output() }
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func (direct) overflowUid(msg container.Msg) int { return container.OverflowUid(msg) }
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func (direct) overflowGid(msg container.Msg) int { return container.OverflowGid(msg) }
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func (direct) mustHsuPath() *container.Absolute { return internal.MustHsuPath() }
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func (direct) fatalf(format string, v ...any) { log.Fatalf(format, v...) }
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