Move some basic early process init into Service Manager

services/service_manager/embedder/set_process_title_linux.cc

 // Copyright (c) 2009 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.
 
 // This file implements BSD-style setproctitle() for Linux.
 // It is written such that it can easily be compiled outside Chromium.
 //
 // The Linux kernel sets up two locations in memory to pass arguments and
 // environment variables to processes. First, there are two char* arrays stored
 // one after another: argv and environ. A pointer to argv is passed to main(),
@@ skipping 19 matching lines @@
 // of the way to make room for a potentially longer title, and then overwrite
 // the memory pointed to by argv[0] with a single replacement string, making
 // sure its size does not exceed the available space.
 //
 // It is perhaps worth noting that patches to add a system call to Linux for
 // this, like in BSD, have never made it in: this is the "official" way to do
 // this on Linux. Presumably it is not in glibc due to some disagreement over
 // this position within the glibc project, leaving applications caught in the
 // middle. (Also, only a very few applications need or want this anyway.)
 
-#include "content/common/set_process_title_linux.h"
+#include "services/service_manager/embedder/set_process_title_linux.h"
 
 #include <stdarg.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 
 extern char** environ;
 
 static char** g_main_argv = NULL;
 static char* g_orig_argv0 = NULL;
 
 void setproctitle(const char* fmt, ...) {
   va_list ap;
   size_t i, avail_size;
   uintptr_t page_size, page, page_end;
   // Sanity check before we try and set the process title.
   // The BSD version allows fmt == NULL to restore the original title.
   if (!g_main_argv || !environ || !fmt)
     return;
   if (!g_orig_argv0) {
     // Save the original argv[0].
     g_orig_argv0 = strdup(g_main_argv[0]);
     if (!g_orig_argv0)
       return;
   }
   page_size = sysconf(_SC_PAGESIZE);
   // Get the page on which the argument list and environment live.
-  page = (uintptr_t) g_main_argv[0];
+  page = (uintptr_t)g_main_argv[0];
   page -= page % page_size;
   page_end = page + page_size;
   // Move the environment out of the way. Note that we are moving the values,
   // not the environment array itself (which may not be on the page we need
   // to overwrite anyway).
   for (i = 0; environ[i]; ++i) {
-    uintptr_t env_i = (uintptr_t) environ[i];
+    uintptr_t env_i = (uintptr_t)environ[i];
     // Only move the value if it's actually in the way. This avoids
     // leaking copies of the values if this function is called again.
     if (page <= env_i && env_i < page_end) {
       char* copy = strdup(environ[i]);
       // Be paranoid. Check for allocation failure and bail out.
       if (!copy)
         return;
       environ[i] = copy;
     }
   }
   // Put the title in argv[0]. We have to zero out the space first since the
   // kernel doesn't actually look for a null terminator unless we make the
   // argument list longer than it started.
-  avail_size = page_end - (uintptr_t) g_main_argv[0];
+  avail_size = page_end - (uintptr_t)g_main_argv[0];
   memset(g_main_argv[0], 0, avail_size);
   va_start(ap, fmt);
   if (fmt[0] == '-') {
     vsnprintf(g_main_argv[0], avail_size, &fmt[1], ap);
   } else {
     size_t size = snprintf(g_main_argv[0], avail_size, "%s ", g_orig_argv0);
     if (size < avail_size)
       vsnprintf(g_main_argv[0] + size, avail_size - size, fmt, ap);
   }
   va_end(ap);
   g_main_argv[1] = NULL;
 }
 
 // A version of this built into glibc would not need this function, since
 // it could stash the argv pointer in __libc_start_main(). But we need it.
 void setproctitle_init(const char** main_argv) {
   if (g_main_argv)
     return;
 
   uintptr_t page_size = sysconf(_SC_PAGESIZE);
   // Check that the argv array is in fact on the same page of memory
   // as the environment array just as an added measure of protection.
-  if (((uintptr_t) environ) / page_size == ((uintptr_t) main_argv) / page_size)
+  if (((uintptr_t)environ) / page_size == ((uintptr_t)main_argv) / page_size)
     g_main_argv = const_cast<char**>(main_argv);
 }