unix: add bindings for setattrlist() on macOS

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.

Change-Id: Ib5a604503a984b95a02b65ad1a437246cd170584
GitHub-Last-Rev: 45dd9d4
GitHub-Pull-Request: #155
Reviewed-on: https://go-review.googlesource.com/c/sys/+/481815
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>

unix/mkerrors.sh

@@ -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)/ ||

unix/syscall_darwin.go

@@ -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

unix/types_darwin.go

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

unix/zsyscall_darwin_amd64.s

@@ -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)
 

unix/zsyscall_darwin_arm64.s

@@ -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)