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unix: implement Getwd using getcwd from libSystem on darwin

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Directly wrap the getcwd implementation provided by libSystem.dylib on
darwin and use it to implement Getwd like on the BSDs. This allows to
drop the custom implementation using getAttrList and to merge the
implementation of Getwd for darwin and the BSDs in syscall_bsd.go.

Change-Id: I62d38a239a7279fb95c912344bda2830856d4da4
Reviewed-on: https://go-review.googlesource.com/c/sys/+/257497
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Tobias Klauser
2020-09-26 10:08:07 +00:00
committed by Tobias Klauser
parent d9f96fdee2
commit 9d91bd6205
19 changed files with 134 additions and 200 deletions
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unix/zsyscall_darwin_arm.go
+22 -15
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@@ -490,21 +490,6 @@ func libc_munlockall_trampoline()
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getattrlist(path *byte, list unsafe.Pointer, buf unsafe.Pointer, size uintptr, options int) (err error) {
_, _, e1 := syscall_syscall6(funcPC(libc_getattrlist_trampoline), uintptr(unsafe.Pointer(path)), uintptr(list), uintptr(buf), uintptr(size), uintptr(options), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
func libc_getattrlist_trampoline()
//go:linkname libc_getattrlist libc_getattrlist
//go:cgo_import_dynamic libc_getattrlist getattrlist "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func pipe() (r int, w int, err error) {
r0, r1, e1 := syscall_rawSyscall(funcPC(libc_pipe_trampoline), 0, 0, 0)
r = int(r0)
@@ -1277,6 +1262,28 @@ func libc_ftruncate_trampoline()
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Getcwd(buf []byte) (n int, err error) {
var _p0 unsafe.Pointer
if len(buf) > 0 {
_p0 = unsafe.Pointer(&buf[0])
} else {
_p0 = unsafe.Pointer(&_zero)
}
r0, _, e1 := syscall_syscall(funcPC(libc_getcwd_trampoline), uintptr(_p0), uintptr(len(buf)), 0)
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
func libc_getcwd_trampoline()
//go:linkname libc_getcwd libc_getcwd
//go:cgo_import_dynamic libc_getcwd getcwd "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Getdtablesize() (size int) {
r0, _, _ := syscall_syscall(funcPC(libc_getdtablesize_trampoline), 0, 0, 0)
size = int(r0)