diff options
Diffstat (limited to 'internal/syscallcompat/sys_linux.go')
| -rw-r--r-- | internal/syscallcompat/sys_linux.go | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/internal/syscallcompat/sys_linux.go b/internal/syscallcompat/sys_linux.go index a431195..cf747b1 100644 --- a/internal/syscallcompat/sys_linux.go +++ b/internal/syscallcompat/sys_linux.go @@ -113,6 +113,28 @@ func Mknodat(dirfd int, path string, mode uint32, dev int) (err error) { return syscall.Mknodat(dirfd, path, mode, dev) } +// MknodatUser runs the Mknodat syscall in the context of a different user. +func MknodatUser(dirfd int, path string, mode uint32, dev int, context *fuse.Context) (err error) { + if context != nil { + runtime.LockOSThread() + defer runtime.UnlockOSThread() + + err = syscall.Setregid(-1, int(context.Owner.Gid)) + if err != nil { + return err + } + defer syscall.Setregid(-1, 0) + + err = syscall.Setreuid(-1, int(context.Owner.Uid)) + if err != nil { + return err + } + defer syscall.Setreuid(-1, 0) + } + + return Mknodat(dirfd, path, mode, dev) +} + // Dup3 wraps the Dup3 syscall. We want to use Dup3 rather than Dup2 because Dup2 // is not implemented on arm64. func Dup3(oldfd int, newfd int, flags int) (err error) { |