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unix: add bindings for setattrlist() on macOS

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The setattrlist() function can be used to mutate the attributes of files
through a single call. For example, one can perform a chmod(), chown(),
chflags(), [...] all at once.

This change also adds bindings for the UF_* and SF_* flags that are
accepted by chflags(). This makes it possible to use setattrlist() to
perform the equivalent of lchflags(), for which we currently have no
binding.
This commit is contained in:
Ed Schouten
2023-04-03 10:32:40 +02:00
parent 94933fc7d0
commit 45dd9d475a
13 changed files with 125 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
unix/darwin_amd64_test.go
View File

@@ -119,6 +119,7 @@ var darwinTests = [...]darwinTest{
{"sendfile", libc_sendfile_trampoline_addr},
{"sendmsg", libc_sendmsg_trampoline_addr},
{"sendto", libc_sendto_trampoline_addr},
{"setattrlist", libc_setattrlist_trampoline_addr},
{"setegid", libc_setegid_trampoline_addr},
{"seteuid", libc_seteuid_trampoline_addr},
{"setgid", libc_setgid_trampoline_addr},

1
unix/darwin_arm64_test.go
View File

@@ -119,6 +119,7 @@ var darwinTests = [...]darwinTest{
{"sendfile", libc_sendfile_trampoline_addr},
{"sendmsg", libc_sendmsg_trampoline_addr},
{"sendto", libc_sendto_trampoline_addr},
{"setattrlist", libc_setattrlist_trampoline_addr},
{"setegid", libc_setegid_trampoline_addr},
{"seteuid", libc_seteuid_trampoline_addr},
{"setgid", libc_setgid_trampoline_addr},

2
unix/mkerrors.sh
View File

@@ -66,6 +66,7 @@ includes_Darwin='
#include <sys/ptrace.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <sys/sockio.h>
#include <sys/sys_domain.h>
@@ -521,6 +522,7 @@ ccflags="$@"
$2 ~ /^NFC_(GENL|PROTO|COMM|RF|SE|DIRECTION|LLCP|SOCKPROTO)_/ ||
$2 ~ /^NFC_.*_(MAX)?SIZE$/ ||
$2 ~ /^RAW_PAYLOAD_/ ||
$2 ~ /^[US]F_/ ||
$2 ~ /^TP_STATUS_/ ||
$2 ~ /^FALLOC_/ ||
$2 ~ /^ICMPV?6?_(FILTER|SEC)/ ||

2
unix/syscall_darwin.go
View File

@@ -613,6 +613,7 @@ func SysctlKinfoProcSlice(name string, args ...int) ([]KinfoProc, error) {
//sys Rmdir(path string) (err error)
//sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
//sys Setattrlist(path string, attrlist *Attrlist, attrBuf []byte, options int) (err error)
//sys Setegid(egid int) (err error)
//sysnb Seteuid(euid int) (err error)
//sysnb Setgid(gid int) (err error)
@@ -675,7 +676,6 @@ func SysctlKinfoProcSlice(name string, args ...int) ([]KinfoProc, error) {
// Kqueue_from_portset_np
// Kqueue_portset
// Getattrlist
// Setattrlist
// Getdirentriesattr
// Searchfs
// Delete

2
unix/types_darwin.go
View File

@@ -140,6 +140,8 @@ type Fsid C.struct_fsid
type Dirent C.struct_dirent
type Attrlist C.struct_attrlist
// File system limits
const (

19
unix/zerrors_darwin_amd64.go
View File

@@ -1270,6 +1270,16 @@ const (
SEEK_END = 0x2
SEEK_HOLE = 0x3
SEEK_SET = 0x0
SF_APPEND = 0x40000
SF_ARCHIVED = 0x10000
SF_DATALESS = 0x40000000
SF_FIRMLINK = 0x800000
SF_IMMUTABLE = 0x20000
SF_NOUNLINK = 0x100000
SF_RESTRICTED = 0x80000
SF_SETTABLE = 0x3fff0000
SF_SUPPORTED = 0x9f0000
SF_SYNTHETIC = 0xc0000000
SHUT_RD = 0x0
SHUT_RDWR = 0x2
SHUT_WR = 0x1
@@ -1543,6 +1553,15 @@ const (
TIOCTIMESTAMP = 0x40107459
TIOCUCNTL = 0x80047466
TOSTOP = 0x400000
UF_APPEND = 0x4
UF_COMPRESSED = 0x20
UF_DATAVAULT = 0x80
UF_HIDDEN = 0x8000
UF_IMMUTABLE = 0x2
UF_NODUMP = 0x1
UF_OPAQUE = 0x8
UF_SETTABLE = 0xffff
UF_TRACKED = 0x40
VDISCARD = 0xf
VDSUSP = 0xb
VEOF = 0x0

19
unix/zerrors_darwin_arm64.go
View File

@@ -1270,6 +1270,16 @@ const (
SEEK_END = 0x2
SEEK_HOLE = 0x3
SEEK_SET = 0x0
SF_APPEND = 0x40000
SF_ARCHIVED = 0x10000
SF_DATALESS = 0x40000000
SF_FIRMLINK = 0x800000
SF_IMMUTABLE = 0x20000
SF_NOUNLINK = 0x100000
SF_RESTRICTED = 0x80000
SF_SETTABLE = 0x3fff0000
SF_SUPPORTED = 0x9f0000
SF_SYNTHETIC = 0xc0000000
SHUT_RD = 0x0
SHUT_RDWR = 0x2
SHUT_WR = 0x1
@@ -1543,6 +1553,15 @@ const (
TIOCTIMESTAMP = 0x40107459
TIOCUCNTL = 0x80047466
TOSTOP = 0x400000
UF_APPEND = 0x4
UF_COMPRESSED = 0x20
UF_DATAVAULT = 0x80
UF_HIDDEN = 0x8000
UF_IMMUTABLE = 0x2
UF_NODUMP = 0x1
UF_OPAQUE = 0x8
UF_SETTABLE = 0xffff
UF_TRACKED = 0x40
VDISCARD = 0xf
VDSUSP = 0xb
VEOF = 0x0

25
unix/zsyscall_darwin_amd64.go
View File

@@ -1992,6 +1992,31 @@ var libc_select_trampoline_addr uintptr
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setattrlist(path string, attrlist *Attrlist, attrBuf []byte, options int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
return
}
var _p1 unsafe.Pointer
if len(attrBuf) > 0 {
_p1 = unsafe.Pointer(&attrBuf[0])
} else {
_p1 = unsafe.Pointer(&_zero)
}
_, _, e1 := syscall_syscall6(libc_setattrlist_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(attrlist)), uintptr(_p1), uintptr(len(attrBuf)), uintptr(options), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_setattrlist_trampoline_addr uintptr
//go:cgo_import_dynamic libc_setattrlist setattrlist "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setegid(egid int) (err error) {
_, _, e1 := syscall_syscall(libc_setegid_trampoline_addr, uintptr(egid), 0, 0)
if e1 != 0 {

5
unix/zsyscall_darwin_amd64.s
View File

@@ -705,6 +705,11 @@ TEXT libc_select_trampoline<>(SB),NOSPLIT,$0-0
GLOBL ·libc_select_trampoline_addr(SB), RODATA, $8
DATA ·libc_select_trampoline_addr(SB)/8, $libc_select_trampoline<>(SB)
TEXT libc_setattrlist_trampoline<>(SB),NOSPLIT,$0-0
JMP libc_setattrlist(SB)
GLOBL ·libc_setattrlist_trampoline_addr(SB), RODATA, $8
DATA ·libc_setattrlist_trampoline_addr(SB)/8, $libc_setattrlist_trampoline<>(SB)
TEXT libc_setegid_trampoline<>(SB),NOSPLIT,$0-0
JMP libc_setegid(SB)

25
unix/zsyscall_darwin_arm64.go
View File

@@ -1992,6 +1992,31 @@ var libc_select_trampoline_addr uintptr
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setattrlist(path string, attrlist *Attrlist, attrBuf []byte, options int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
return
}
var _p1 unsafe.Pointer
if len(attrBuf) > 0 {
_p1 = unsafe.Pointer(&attrBuf[0])
} else {
_p1 = unsafe.Pointer(&_zero)
}
_, _, e1 := syscall_syscall6(libc_setattrlist_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(attrlist)), uintptr(_p1), uintptr(len(attrBuf)), uintptr(options), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_setattrlist_trampoline_addr uintptr
//go:cgo_import_dynamic libc_setattrlist setattrlist "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setegid(egid int) (err error) {
_, _, e1 := syscall_syscall(libc_setegid_trampoline_addr, uintptr(egid), 0, 0)
if e1 != 0 {

5
unix/zsyscall_darwin_arm64.s
View File

@@ -705,6 +705,11 @@ TEXT libc_select_trampoline<>(SB),NOSPLIT,$0-0
GLOBL ·libc_select_trampoline_addr(SB), RODATA, $8
DATA ·libc_select_trampoline_addr(SB)/8, $libc_select_trampoline<>(SB)
TEXT libc_setattrlist_trampoline<>(SB),NOSPLIT,$0-0
JMP libc_setattrlist(SB)
GLOBL ·libc_setattrlist_trampoline_addr(SB), RODATA, $8
DATA ·libc_setattrlist_trampoline_addr(SB)/8, $libc_setattrlist_trampoline<>(SB)
TEXT libc_setegid_trampoline<>(SB),NOSPLIT,$0-0
JMP libc_setegid(SB)

10
unix/ztypes_darwin_amd64.go
View File

@@ -151,6 +151,16 @@ type Dirent struct {
_ [3]byte
}
type Attrlist struct {
Bitmapcount uint16
Reserved uint16
Commonattr uint32
Volattr uint32
Dirattr uint32
Fileattr uint32
Forkattr uint32
}
const (
PathMax = 0x400
)

10
unix/ztypes_darwin_arm64.go
View File

@@ -151,6 +151,16 @@ type Dirent struct {
_ [3]byte
}
type Attrlist struct {
Bitmapcount uint16
Reserved uint16
Commonattr uint32
Volattr uint32
Dirattr uint32
Fileattr uint32
Forkattr uint32
}
const (
PathMax = 0x400
)