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package storage
import (
"os"
"syscall"
"codeberg.org/gruf/go-store/util"
)
const (
// default file permission bits
defaultDirPerms = 0o755
defaultFilePerms = 0o644
// default file open flags
defaultFileROFlags = syscall.O_RDONLY
defaultFileRWFlags = syscall.O_CREAT | syscall.O_RDWR
defaultFileLockFlags = syscall.O_RDONLY | syscall.O_CREAT
)
// NOTE:
// These functions are for opening storage files,
// not necessarily for e.g. initial setup (OpenFile)
// open should not be called directly.
func open(path string, flags int) (*os.File, error) {
var fd int
err := util.RetryOnEINTR(func() (err error) {
fd, err = syscall.Open(path, flags, defaultFilePerms)
return
})
if err != nil {
return nil, err
}
return os.NewFile(uintptr(fd), path), nil
}
// stat checks for a file on disk.
func stat(path string) (bool, error) {
var stat syscall.Stat_t
err := util.RetryOnEINTR(func() error {
return syscall.Stat(path, &stat)
})
if err != nil {
if err == syscall.ENOENT { //nolint
err = nil
}
return false, err
}
return true, nil
}
// unlink removes a file (not dir!) on disk.
func unlink(path string) error {
return util.RetryOnEINTR(func() error {
return syscall.Unlink(path)
})
}
// rmdir removes a dir (not file!) on disk.
func rmdir(path string) error {
return util.RetryOnEINTR(func() error {
return syscall.Rmdir(path)
})
}
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