mirror of
https://gitea.com/Sirherobrine23/tea.git
synced 2024-08-21 17:57:24 +00:00
vendor go update vendors Co-authored-by: 6543 <6543@obermui.de> Reviewed-on: https://gitea.com/gitea/tea/pulls/145 Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com> Reviewed-by: techknowlogick <techknowlogick@gitea.io>
109 lines
2.7 KiB
Go
109 lines
2.7 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// +build darwin,go1.13
|
|
|
|
package unix
|
|
|
|
import (
|
|
"unsafe"
|
|
|
|
"golang.org/x/sys/internal/unsafeheader"
|
|
)
|
|
|
|
//sys closedir(dir uintptr) (err error)
|
|
//sys readdir_r(dir uintptr, entry *Dirent, result **Dirent) (res Errno)
|
|
|
|
func fdopendir(fd int) (dir uintptr, err error) {
|
|
r0, _, e1 := syscall_syscallPtr(funcPC(libc_fdopendir_trampoline), uintptr(fd), 0, 0)
|
|
dir = uintptr(r0)
|
|
if e1 != 0 {
|
|
err = errnoErr(e1)
|
|
}
|
|
return
|
|
}
|
|
|
|
func libc_fdopendir_trampoline()
|
|
|
|
//go:linkname libc_fdopendir libc_fdopendir
|
|
//go:cgo_import_dynamic libc_fdopendir fdopendir "/usr/lib/libSystem.B.dylib"
|
|
|
|
func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
|
|
// Simulate Getdirentries using fdopendir/readdir_r/closedir.
|
|
// We store the number of entries to skip in the seek
|
|
// offset of fd. See issue #31368.
|
|
// It's not the full required semantics, but should handle the case
|
|
// of calling Getdirentries or ReadDirent repeatedly.
|
|
// It won't handle assigning the results of lseek to *basep, or handle
|
|
// the directory being edited underfoot.
|
|
skip, err := Seek(fd, 0, 1 /* SEEK_CUR */)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
// We need to duplicate the incoming file descriptor
|
|
// because the caller expects to retain control of it, but
|
|
// fdopendir expects to take control of its argument.
|
|
// Just Dup'ing the file descriptor is not enough, as the
|
|
// result shares underlying state. Use Openat to make a really
|
|
// new file descriptor referring to the same directory.
|
|
fd2, err := Openat(fd, ".", O_RDONLY, 0)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
d, err := fdopendir(fd2)
|
|
if err != nil {
|
|
Close(fd2)
|
|
return 0, err
|
|
}
|
|
defer closedir(d)
|
|
|
|
var cnt int64
|
|
for {
|
|
var entry Dirent
|
|
var entryp *Dirent
|
|
e := readdir_r(d, &entry, &entryp)
|
|
if e != 0 {
|
|
return n, errnoErr(e)
|
|
}
|
|
if entryp == nil {
|
|
break
|
|
}
|
|
if skip > 0 {
|
|
skip--
|
|
cnt++
|
|
continue
|
|
}
|
|
|
|
reclen := int(entry.Reclen)
|
|
if reclen > len(buf) {
|
|
// Not enough room. Return for now.
|
|
// The counter will let us know where we should start up again.
|
|
// Note: this strategy for suspending in the middle and
|
|
// restarting is O(n^2) in the length of the directory. Oh well.
|
|
break
|
|
}
|
|
|
|
// Copy entry into return buffer.
|
|
var s []byte
|
|
hdr := (*unsafeheader.Slice)(unsafe.Pointer(&s))
|
|
hdr.Data = unsafe.Pointer(&entry)
|
|
hdr.Cap = reclen
|
|
hdr.Len = reclen
|
|
copy(buf, s)
|
|
|
|
buf = buf[reclen:]
|
|
n += reclen
|
|
cnt++
|
|
}
|
|
// Set the seek offset of the input fd to record
|
|
// how many files we've already returned.
|
|
_, err = Seek(fd, cnt, 0 /* SEEK_SET */)
|
|
if err != nil {
|
|
return n, err
|
|
}
|
|
|
|
return n, nil
|
|
}
|