implement GetProcessExecutablePath() on OpenBSD and start using it

base/process_util_openbsd.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/process_util.h"
 
 #include <ctype.h>
 #include <dirent.h>
 #include <dlfcn.h>
 #include <errno.h>
@@ skipping 29 matching lines @@
 
   mib[5] = (length / sizeof(struct kinfo_proc));
 
   if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
     return -1;
 
   return info.p_ppid;
 }
 
 FilePath GetProcessExecutablePath(ProcessHandle process) {
-  return FilePath(std::string("/usr/local/chrome/chrome"));
+  struct kinfo_proc kp;
+  size_t len;
+  int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process,
+                sizeof(struct kinfo_proc), 0 };
+
+  if (sysctl(mib, arraysize(mib), NULL, &len, NULL, 0) == -1)
+    return FilePath();
+  mib[5] = (len / sizeof(struct kinfo_proc));
+  if (sysctl(mib, arraysize(mib), &kp, &len, NULL, 0) < 0)
+    return FilePath();
+  if ((kp.p_flag & P_SYSTEM) != 0)
+    return FilePath();
+  if (strcmp(kp.p_comm, "chrome") == 0)
+    return FilePath(kp.p_comm);
+
+  return FilePath();
 }
 
 ProcessIterator::ProcessIterator(const ProcessFilter* filter)
     : index_of_kinfo_proc_(),
       filter_(filter) {
 
   int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_UID, getuid(),
                 sizeof(struct kinfo_proc), 0 };
 
   bool done = false;
@@ skipping 261 matching lines @@
   return mem_total - (mem_free*pagesize) - (mem_inactive*pagesize);
 }
 
 void EnableTerminationOnOutOfMemory() {
 }
 
 void EnableTerminationOnHeapCorruption() {
 }
 
 }  // namespace base