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authorJakob Unterwurzacher2020-08-09 22:11:46 +0200
committerJakob Unterwurzacher2020-08-09 22:11:46 +0200
commit6d4f1a6888cafd218cb97bd11de6a7553d9bc8f1 (patch)
tree7b48b6e97c4c73a4e0e9dce3456768526c46da65 /internal/fusefrontend_reverse/virtualconf.go
parent527609266386890fe1657c225c643ca448bcd71d (diff)
v2api/reverse: implement Read
Diffstat (limited to 'internal/fusefrontend_reverse/virtualconf.go')
-rw-r--r--internal/fusefrontend_reverse/virtualconf.go55
1 files changed, 55 insertions, 0 deletions
diff --git a/internal/fusefrontend_reverse/virtualconf.go b/internal/fusefrontend_reverse/virtualconf.go
new file mode 100644
index 0000000..8620f6d
--- /dev/null
+++ b/internal/fusefrontend_reverse/virtualconf.go
@@ -0,0 +1,55 @@
+package fusefrontend_reverse
+
+import (
+ "context"
+ "sync"
+ "syscall"
+
+ "github.com/hanwen/go-fuse/v2/fs"
+ "github.com/hanwen/go-fuse/v2/fuse"
+)
+
+var _ = (fs.NodeOpener)((*VirtualConfNode)(nil))
+
+type VirtualConfNode struct {
+ fs.Inode
+
+ path string
+}
+
+func (n *VirtualConfNode) Open(ctx context.Context, flags uint32) (fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
+ fd, err := syscall.Open(n.path, syscall.O_RDONLY, 0)
+ if err != nil {
+ errno = fs.ToErrno(err)
+ return
+ }
+ fh = &VirtualConfFile{fd: fd}
+ return
+}
+
+// Check that we have implemented the fs.File* interfaces
+var _ = (fs.FileReader)((*VirtualConfFile)(nil))
+var _ = (fs.FileReleaser)((*VirtualConfFile)(nil))
+
+type VirtualConfFile struct {
+ mu sync.Mutex
+ fd int
+}
+
+func (f *VirtualConfFile) Read(ctx context.Context, buf []byte, off int64) (res fuse.ReadResult, errno syscall.Errno) {
+ f.mu.Lock()
+ defer f.mu.Unlock()
+ res = fuse.ReadResultFd(uintptr(f.fd), off, len(buf))
+ return
+}
+
+func (f *VirtualConfFile) Release(ctx context.Context) syscall.Errno {
+ f.mu.Lock()
+ defer f.mu.Unlock()
+ if f.fd != -1 {
+ err := syscall.Close(f.fd)
+ f.fd = -1
+ return fs.ToErrno(err)
+ }
+ return syscall.EBADF
+}