From: Brad Smith Subject: Go - getexecpath() support To: ports@openbsd.org Cc: Joel Sing Date: Sun, 4 Oct 2026 05:45:42 -0400 Here is a diff for Go to make use of getexecpath() for os.Executable(). Tested on aarch64 and amd64. Index: Makefile =================================================================== RCS file: /cvs/ports/lang/go/Makefile,v retrieving revision 1.184 diff -u -p -u -p -r1.184 Makefile --- Makefile 16 Sep 2026 16:16:51 -0000 1.184 +++ Makefile 4 Oct 2026 09:37:19 -0000 @@ -10,6 +10,7 @@ COMMENT = Go programming language VERSION = 1.27.1 DISTNAME = go${VERSION}.src PKGNAME = go-${VERSION} +REVISION = 0 PKGSPEC = ${FULLPKGNAME:S/go-/go-=/} CATEGORIES = lang Index: patches/patch-src_internal_syscall_unix_asm_openbsd_s =================================================================== RCS file: patches/patch-src_internal_syscall_unix_asm_openbsd_s diff -N patches/patch-src_internal_syscall_unix_asm_openbsd_s --- /dev/null 1 Jan 1970 00:00:00 -0000 +++ patches/patch-src_internal_syscall_unix_asm_openbsd_s 4 Oct 2026 09:37:19 -0000 @@ -0,0 +1,11 @@ +- Use getexecpath() for os.Executable() + +Index: src/internal/syscall/unix/asm_openbsd.s +--- src/internal/syscall/unix/asm_openbsd.s.orig ++++ src/internal/syscall/unix/asm_openbsd.s +@@ -22,3 +22,5 @@ TEXT ·libc_linkat_trampoline(SB),NOSPLI + JMP libc_linkat(SB) + TEXT ·libc_symlinkat_trampoline(SB),NOSPLIT,$0-0 + JMP libc_symlinkat(SB) ++TEXT ·libc_getexecpath_trampoline(SB),NOSPLIT,$0-0 ++ JMP libc_getexecpath(SB) Index: patches/patch-src_internal_syscall_unix_getexecpath_openbsd_go =================================================================== RCS file: patches/patch-src_internal_syscall_unix_getexecpath_openbsd_go diff -N patches/patch-src_internal_syscall_unix_getexecpath_openbsd_go --- /dev/null 1 Jan 1970 00:00:00 -0000 +++ patches/patch-src_internal_syscall_unix_getexecpath_openbsd_go 4 Oct 2026 09:37:19 -0000 @@ -0,0 +1,31 @@ +- Use getexecpath() for os.Executable() + +Index: src/internal/syscall/unix/getexecpath_openbsd.go +--- src/internal/syscall/unix/getexecpath_openbsd.go.orig ++++ src/internal/syscall/unix/getexecpath_openbsd.go +@@ -0,0 +1,25 @@ ++// Copyright 2026 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. ++ ++package unix ++ ++import ( ++ "internal/abi" ++ "unsafe" ++) ++ ++//go:cgo_import_dynamic libc_getexecpath getexecpath "libc.so" ++ ++func libc_getexecpath_trampoline() ++ ++// Getexecpath copies the absolute, canonicalized pathname of the ++// running executable into buf as a NUL-terminated string. ++func Getexecpath(buf []byte) error { ++ _, _, errno := syscall_syscall(abi.FuncPCABI0(libc_getexecpath_trampoline), ++ uintptr(unsafe.Pointer(unsafe.SliceData(buf))), uintptr(len(buf)), 0) ++ if errno != 0 { ++ return errno ++ } ++ return nil ++} Index: patches/patch-src_os_executable_openbsd_go =================================================================== RCS file: patches/patch-src_os_executable_openbsd_go diff -N patches/patch-src_os_executable_openbsd_go --- /dev/null 1 Jan 1970 00:00:00 -0000 +++ patches/patch-src_os_executable_openbsd_go 4 Oct 2026 09:37:19 -0000 @@ -0,0 +1,24 @@ +- Use getexecpath() for os.Executable() + +Index: src/os/executable_openbsd.go +--- src/os/executable_openbsd.go.orig ++++ src/os/executable_openbsd.go +@@ -0,0 +1,18 @@ ++// Copyright 2026 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. ++ ++package os ++ ++import ( ++ "internal/bytealg" ++ "internal/syscall/unix" ++) ++ ++func executable() (string, error) { ++ var buf [1024]byte // PATH_MAX; the kernel caps the path at this length ++ if err := unix.Getexecpath(buf[:]); err != nil { ++ return "", NewSyscallError("getexecpath", err) ++ } ++ return string(buf[:bytealg.IndexByte(buf[:], 0)]), nil ++} Index: patches/patch-src_os_executable_path_go =================================================================== RCS file: patches/patch-src_os_executable_path_go diff -N patches/patch-src_os_executable_path_go --- /dev/null 1 Jan 1970 00:00:00 -0000 +++ patches/patch-src_os_executable_path_go 4 Oct 2026 09:37:19 -0000 @@ -0,0 +1,14 @@ +- Use getexecpath() for os.Executable() + +Index: src/os/executable_path.go +--- src/os/executable_path.go.orig ++++ src/os/executable_path.go +@@ -2,7 +2,7 @@ + // Use of this source code is governed by a BSD-style + // license that can be found in the LICENSE file. + +-//go:build aix || openbsd ++//go:build aix + + package os + Index: patches/patch-src_os_executable_test_go =================================================================== RCS file: patches/patch-src_os_executable_test_go diff -N patches/patch-src_os_executable_test_go --- /dev/null 1 Jan 1970 00:00:00 -0000 +++ patches/patch-src_os_executable_test_go 4 Oct 2026 09:37:19 -0000 @@ -0,0 +1,25 @@ +- Use getexecpath() for os.Executable() + +Index: src/os/executable_test.go +--- src/os/executable_test.go.orig ++++ src/os/executable_test.go +@@ -48,8 +48,8 @@ func TestExecutable(t *testing.T) { + // make child start with a relative program path + cmd.Dir = dir + cmd.Path = fn +- if runtime.GOOS == "openbsd" || runtime.GOOS == "aix" { +- // OpenBSD and AIX rely on argv[0] ++ if runtime.GOOS == "aix" { ++ // AIX relies on argv[0] + } else { + // forge argv[0] for child, so that we can verify we could correctly + // get real path of the executable without influenced by argv[0]. +@@ -86,7 +86,7 @@ func TestExecutableDeleted(t *testing.T) + switch runtime.GOOS { + case "windows", "plan9": + t.Skipf("%v does not support deleting running binary", runtime.GOOS) +- case "openbsd", "freebsd", "aix": ++ case "freebsd", "aix": + t.Skipf("%v does not support reading deleted binary name", runtime.GOOS) + } + t.Parallel() Index: pkg/PLIST =================================================================== RCS file: /cvs/ports/lang/go/pkg/PLIST,v retrieving revision 1.100 diff -u -p -u -p -r1.100 PLIST --- pkg/PLIST 16 Sep 2026 16:16:51 -0000 1.100 +++ pkg/PLIST 4 Oct 2026 09:37:20 -0000 @@ -9188,6 +9188,7 @@ go/src/internal/syscall/unix/fchmodat_te go/src/internal/syscall/unix/fcntl_js.go go/src/internal/syscall/unix/fcntl_unix.go go/src/internal/syscall/unix/fcntl_wasip1.go +go/src/internal/syscall/unix/getexecpath_openbsd.go go/src/internal/syscall/unix/getrandom.go go/src/internal/syscall/unix/getrandom_dragonfly.go go/src/internal/syscall/unix/getrandom_freebsd.go @@ -10843,6 +10844,7 @@ go/src/os/executable_darwin.go go/src/os/executable_dragonfly.go go/src/os/executable_freebsd.go go/src/os/executable_netbsd.go +go/src/os/executable_openbsd.go go/src/os/executable_path.go go/src/os/executable_plan9.go go/src/os/executable_procfs.go