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package tmpdir
import (
"os"
"runtime"
"github.com/containers/image/v5/types"
)
// unixTempDirForBigFiles is the directory path to store big files on non Windows systems.
// You can override this at build time with
// -ldflags '-X github.com/containers/image/v5/internal/tmpdir.unixTempDirForBigFiles=$your_path'
var unixTempDirForBigFiles = builtinUnixTempDirForBigFiles
// builtinUnixTempDirForBigFiles is the directory path to store big files.
// Do not use the system default of os.TempDir(), usually /tmp, because with systemd it could be a tmpfs.
// DO NOT change this, instead see unixTempDirForBigFiles above.
const builtinUnixTempDirForBigFiles = "/var/tmp"
const prefix = "container_images_"
// TemporaryDirectoryForBigFiles returns a directory for temporary (big) files.
// On non Windows systems it avoids the use of os.TempDir(), because the default temporary directory usually falls under /tmp
// which on systemd based systems could be the unsuitable tmpfs filesystem.
func temporaryDirectoryForBigFiles(sys *types.SystemContext) string {
if sys != nil && sys.BigFilesTemporaryDir != "" {
return sys.BigFilesTemporaryDir
}
var temporaryDirectoryForBigFiles string
if runtime.GOOS == "windows" {
temporaryDirectoryForBigFiles = os.TempDir()
} else {
temporaryDirectoryForBigFiles = unixTempDirForBigFiles
}
return temporaryDirectoryForBigFiles
}
func CreateBigFileTemp(sys *types.SystemContext, name string) (*os.File, error) {
return os.CreateTemp(temporaryDirectoryForBigFiles(sys), prefix+name)
}
func MkDirBigFileTemp(sys *types.SystemContext, name string) (string, error) {
return os.MkdirTemp(temporaryDirectoryForBigFiles(sys), prefix+name)
}
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