Refs #10260 OpenBSD support #25327

runtime/bin/platform_openbsd.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
-#if defined(TARGET_OS_LINUX)
+#if defined(TARGET_OS_OPENBSD)
 
 #include "bin/file.h"
 #include "bin/platform.h"
 
 #include <signal.h>  // NOLINT
 #include <string.h>  // NOLINT
 #include <unistd.h>  // NOLINT
 
 #include "bin/fdutils.h"
 
+extern char **environ;
 
 namespace dart {
 namespace bin {
 
 bool Platform::Initialize() {
   // Turn off the signal handler for SIGPIPE as it causes the process
   // to terminate on writing to a closed pipe. Without the signal
   // handler error EPIPE is set instead.
   struct sigaction act;
   bzero(&act, sizeof(act));
   act.sa_handler = SIG_IGN;
   if (sigaction(SIGPIPE, &act, 0) != 0) {
     perror("Setting signal handler failed");
     return false;
   }
   return true;
 }
 
 
 int Platform::NumberOfProcessors() {
   return sysconf(_SC_NPROCESSORS_ONLN);
 }
 
 
 const char* Platform::OperatingSystem() {
-  return "linux";
+  return "openbsd";
 }
 
 
 const char* Platform::LibraryExtension() {
   return "so";
 }
 
 
 bool Platform::LocalHostname(char *buffer, intptr_t buffer_length) {
   return gethostname(buffer, buffer_length) == 0;
@@ skipping 14 matching lines @@
   return result;
 }
 
 
 void Platform::FreeEnvironment(char** env, intptr_t count) {
   delete[] env;
 }
 
 
 char* Platform::ResolveExecutablePath() {
+  // TODO(mulander): There is no procfs on OpenBSD - find a workaround

[Ivan Posva, 2016/01/11 23:58:40]

Would remembering arg[0] in main.cc work? It is not generally applicable for all
VM embedding scenarios, but could be a possibility here. Although I am not sure
whether this is even supported in OpenBSD.

[mulander, 2016/01/12 00:22:45]

There is an example implementation in Go I want to have a closer look at:

https://github.com/kardianos/osext/commit/b4814f465fb1f92d46e37f7ef84d732ece7...

It's not the prettiest thing but it works pretty well for syncthing. arg[0] as
in what's passed to main should obviously work except any link / path magic
happening.

   return File::LinkTarget("/proc/self/exe");
 }
 
 void Platform::Exit(int exit_code) {
   exit(exit_code);
 }
 
 }  // namespace bin
 }  // namespace dart
 
-#endif  // defined(TARGET_OS_LINUX)
+#endif  // defined(TARGET_OS_OPENBSD)