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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "base/process/process_handle.h"
      6 
      7 #include <sys/sysctl.h>
      8 #include <sys/types.h>
      9 #include <unistd.h>
     10 
     11 namespace base {
     12 
     13 ProcessId GetParentProcessId(ProcessHandle process) {
     14   struct kinfo_proc info;
     15   size_t length;
     16   int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process,
     17                 sizeof(struct kinfo_proc), 0 };
     18 
     19   if (sysctl(mib, arraysize(mib), NULL, &length, NULL, 0) < 0)
     20     return -1;
     21 
     22   mib[5] = (length / sizeof(struct kinfo_proc));
     23 
     24   if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
     25     return -1;
     26 
     27   return info.p_ppid;
     28 }
     29 
     30 FilePath GetProcessExecutablePath(ProcessHandle process) {
     31   struct kinfo_proc kp;
     32   size_t len;
     33   int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process,
     34                 sizeof(struct kinfo_proc), 0 };
     35 
     36   if (sysctl(mib, arraysize(mib), NULL, &len, NULL, 0) == -1)
     37     return FilePath();
     38   mib[5] = (len / sizeof(struct kinfo_proc));
     39   if (sysctl(mib, arraysize(mib), &kp, &len, NULL, 0) < 0)
     40     return FilePath();
     41   if ((kp.p_flag & P_SYSTEM) != 0)
     42     return FilePath();
     43   if (strcmp(kp.p_comm, "chrome") == 0)
     44     return FilePath(kp.p_comm);
     45 
     46   return FilePath();
     47 }
     48 
     49 }  // namespace base
     50