$NetBSD: patch-base_process_process__iterator__netbsd.cc,v 1.1 2025/02/06 09:57:41 wiz Exp $

* Part of patchset to build chromium on NetBSD
* Based on OpenBSD's chromium patches, and
  pkgsrc's qt5-qtwebengine patches

--- base/process/process_iterator_netbsd.cc.orig	2024-12-21 10:25:09.617721988 +0000
+++ base/process/process_iterator_netbsd.cc
@@ -0,0 +1,132 @@
+// Copyright 2013 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/process/process_iterator.h"
+
+#include <errno.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <sys/proc.h>
+#include <sys/sysctl.h>
+
+#include "base/logging.h"
+#include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
+
+namespace base {
+
+ProcessIterator::ProcessIterator(const ProcessFilter* filter)
+    : filter_(filter) {
+  int mib[] = { CTL_KERN, KERN_PROC2, KERN_PROC_UID, static_cast<int>(getuid()),
+                sizeof(struct kinfo_proc2), 1 };
+
+  bool done = false;
+  int try_num = 1;
+  const int max_tries = 10;
+  size_t num_of_kinfo_proc;
+
+  do {
+    size_t len = 0;
+    if (sysctl(mib, std::size(mib), NULL, &len, NULL, 0) < 0) {
+      DLOG(ERROR) << "failed to get the size needed for the process list";
+      kinfo_procs_.resize(0);
+      done = true;
+    } else {
+      num_of_kinfo_proc = len / sizeof(struct kinfo_proc2);
+      // Leave some spare room for process table growth (more could show up
+      // between when we check and now)
+      num_of_kinfo_proc += 16;
+      kinfo_procs_.resize(num_of_kinfo_proc);
+      len = num_of_kinfo_proc * sizeof(struct kinfo_proc2);
+      if (sysctl(mib, std::size(mib), &kinfo_procs_[0], &len, NULL, 0) < 0) {
+        // If we get a mem error, it just means we need a bigger buffer, so
+        // loop around again.  Anything else is a real error and give up.
+        if (errno != ENOMEM) {
+          DLOG(ERROR) << "failed to get the process list";
+          kinfo_procs_.resize(0);
+          done = true;
+        }
+      } else {
+        // Got the list, just make sure we're sized exactly right
+        num_of_kinfo_proc = len / sizeof(struct kinfo_proc2);
+        kinfo_procs_.resize(num_of_kinfo_proc);
+        done = true;
+      }
+    }
+  } while (!done && (try_num++ < max_tries));
+
+  if (!done) {
+    DLOG(ERROR) << "failed to collect the process list in a few tries";
+    kinfo_procs_.resize(0);
+  }
+}
+
+ProcessIterator::~ProcessIterator() = default;
+
+bool ProcessIterator::CheckForNextProcess() {
+  std::string data;
+  for (; index_of_kinfo_proc_ < kinfo_procs_.size(); ++index_of_kinfo_proc_) {
+    kinfo_proc2& kinfo = kinfo_procs_[index_of_kinfo_proc_];
+
+    // Skip processes just awaiting collection
+    if ((kinfo.p_pid > 0) && (kinfo.p_stat == SZOMB))
+      continue;
+
+    int mib[] = { CTL_KERN, KERN_PROC_ARGS, kinfo.p_pid };
+
+    // Find out what size buffer we need.
+    size_t data_len = 0;
+    if (sysctl(mib, std::size(mib), NULL, &data_len, NULL, 0) < 0) {
+      DVPLOG(1) << "failed to figure out the buffer size for a commandline";
+      continue;
+    }
+
+    data.resize(data_len);
+    if (sysctl(mib, std::size(mib), &data[0], &data_len, NULL, 0) < 0) {
+      DVPLOG(1) << "failed to fetch a commandline";
+      continue;
+    }
+
+    // |data| contains all the command line parameters of the process, separated
+    // by blocks of one or more null characters. We tokenize |data| into a
+    // vector of strings using '\0' as a delimiter and populate
+    // |entry_.cmd_line_args_|.
+    std::string delimiters;
+    delimiters.push_back('\0');
+    entry_.cmd_line_args_ = SplitString(data, delimiters, KEEP_WHITESPACE,
+                                        SPLIT_WANT_NONEMPTY);
+
+    // |data| starts with the full executable path followed by a null character.
+    // We search for the first instance of '\0' and extract everything before it
+    // to populate |entry_.exe_file_|.
+    size_t exec_name_end = data.find('\0');
+    if (exec_name_end == std::string::npos) {
+      DLOG(ERROR) << "command line data didn't match expected format";
+      continue;
+    }
+
+    entry_.pid_ = kinfo.p_pid;
+    entry_.ppid_ = kinfo.p_ppid;
+    entry_.gid_ = kinfo.p__pgid;
+    size_t last_slash = data.rfind('/', exec_name_end);
+    if (last_slash == std::string::npos)
+      entry_.exe_file_.assign(data, 0, exec_name_end);
+    else
+      entry_.exe_file_.assign(data, last_slash + 1,
+                              exec_name_end - last_slash - 1);
+    // Start w/ the next entry next time through
+    ++index_of_kinfo_proc_;
+    // Done
+    return true;
+  }
+  return false;
+}
+
+bool NamedProcessIterator::IncludeEntry() {
+  return (executable_name_ == entry().exe_file() &&
+          ProcessIterator::IncludeEntry());
+}
+
+}  // namespace base
