55 lines
1 KiB
Go
55 lines
1 KiB
Go
// +build linux darwin
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package continuity
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import (
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"fmt"
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"os"
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"syscall"
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)
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func deviceInfo(fi os.FileInfo) (uint64, uint64, error) {
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sys, ok := fi.Sys().(*syscall.Stat_t)
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if !ok {
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return 0, 0, fmt.Errorf("cannot extract device from os.FileInfo")
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}
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return getmajor(sys.Rdev), getminor(sys.Rdev), nil
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}
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// mknod provides a shortcut for syscall.Mknod
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func mknod(p string, mode os.FileMode, maj, min int) error {
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var (
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m = syscallMode(mode.Perm())
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dev int
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)
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if mode&os.ModeDevice != 0 {
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dev = makedev(maj, min)
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if mode&os.ModeCharDevice != 0 {
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m |= syscall.S_IFCHR
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} else {
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m |= syscall.S_IFBLK
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}
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} else if mode&os.ModeNamedPipe != 0 {
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m |= syscall.S_IFIFO
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}
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return syscall.Mknod(p, m, dev)
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}
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// syscallMode returns the syscall-specific mode bits from Go's portable mode bits.
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func syscallMode(i os.FileMode) (o uint32) {
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o |= uint32(i.Perm())
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if i&os.ModeSetuid != 0 {
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o |= syscall.S_ISUID
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}
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if i&os.ModeSetgid != 0 {
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o |= syscall.S_ISGID
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}
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if i&os.ModeSticky != 0 {
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o |= syscall.S_ISVTX
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}
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return
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}
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