hardcoresushi/libgocryptfs
1
0
Fork 0
Code Issues Pull Requests Releases Activity

syscallcompat: use early return in asUser()

Browse Source
This commit is contained in:
Jakob Unterwurzacher 2021-08-19 09:01:58 +02:00
parent be2bd4eec7
commit 02c91d73ce
1 changed files with 34 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
internal/syscallcompat/sys_linux.go
View File

@ -91,10 +91,15 @@ func getSupplementaryGroups(pid uint32) (gids []int) {
return nil return nil
} }
// asUser runs the function `f` under the effective uid, gid, groups specified // asUser runs `f()` under the effective uid, gid, groups specified
// in `context`. // in `context`.
//
// If `context` is nil, `f()` is executed directly without switching user id.
func asUser(f func() (int, error), context *fuse.Context) (int, error) { func asUser(f func() (int, error), context *fuse.Context) (int, error) {
if context != nil { if context == nil {
return f()
}
runtime.LockOSThread() runtime.LockOSThread()
defer runtime.UnlockOSThread() defer runtime.UnlockOSThread()
@ -122,7 +127,7 @@ func asUser(f func() (int, error), context *fuse.Context) (int, error) {
return -1, err return -1, err
} }
defer unix.Setreuid(-1, 0) defer unix.Setreuid(-1, 0)
}
return f() return f()
} }