65 lines
1.9 KiB
Go
65 lines
1.9 KiB
Go
package sys
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import (
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"io/fs"
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"os/user"
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"path"
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"strconv"
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"git.gensokyo.uk/security/fortify/fst"
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"git.gensokyo.uk/security/fortify/internal/fmsg"
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)
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// State provides safe interaction with operating system state.
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type State interface {
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// Geteuid provides [os.Geteuid].
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Geteuid() int
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// LookupEnv provides [os.LookupEnv].
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LookupEnv(key string) (string, bool)
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// TempDir provides [os.TempDir].
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TempDir() string
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// LookPath provides [exec.LookPath].
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LookPath(file string) (string, error)
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// MustExecutable provides [proc.MustExecutable].
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MustExecutable() string
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// LookupGroup provides [user.LookupGroup].
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LookupGroup(name string) (*user.Group, error)
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// ReadDir provides [os.ReadDir].
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ReadDir(name string) ([]fs.DirEntry, error)
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// Stat provides [os.Stat].
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Stat(name string) (fs.FileInfo, error)
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// Open provides [os.Open]
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Open(name string) (fs.File, error)
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// EvalSymlinks provides [filepath.EvalSymlinks]
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EvalSymlinks(path string) (string, error)
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// Exit provides [os.Exit].
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Exit(code int)
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Println(v ...any)
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Printf(format string, v ...any)
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// Paths returns a populated [Paths] struct.
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Paths() fst.Paths
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// Uid invokes fsu and returns target uid.
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// Any errors returned by Uid is already wrapped [fmsg.BaseError].
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Uid(aid int) (int, error)
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}
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// CopyPaths is a generic implementation of [System.Paths].
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func CopyPaths(os State, v *fst.Paths) {
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v.SharePath = path.Join(os.TempDir(), "fortify."+strconv.Itoa(os.Geteuid()))
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fmsg.Verbosef("process share directory at %q", v.SharePath)
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if r, ok := os.LookupEnv(xdgRuntimeDir); !ok || r == "" || !path.IsAbs(r) {
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// fall back to path in share since fortify has no hard XDG dependency
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v.RunDirPath = path.Join(v.SharePath, "run")
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v.RuntimePath = path.Join(v.RunDirPath, "compat")
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} else {
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v.RuntimePath = r
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v.RunDirPath = path.Join(v.RuntimePath, "fortify")
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}
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fmsg.Verbosef("runtime directory at %q", v.RunDirPath)
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}
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