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Issue 6002013: Move the SetProcTitle code out of base and into chrome/common. This is only... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: '' Created 9 years, 11 months ago
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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 // This file implements BSD-style setproctitle() for Linux. 5 // This file implements BSD-style setproctitle() for Linux.
6 // It is written such that it can easily be compiled outside Chromium. 6 // It is written such that it can easily be compiled outside Chromium.
7 // 7 //
8 // The Linux kernel sets up two locations in memory to pass arguments and 8 // The Linux kernel sets up two locations in memory to pass arguments and
9 // environment variables to processes. First, there are two char* arrays stored 9 // environment variables to processes. First, there are two char* arrays stored
10 // one after another: argv and environ. A pointer to argv is passed to main(), 10 // one after another: argv and environ. A pointer to argv is passed to main(),
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30 // of the way to make room for a potentially longer title, and then overwrite 30 // of the way to make room for a potentially longer title, and then overwrite
31 // the memory pointed to by argv[0] with a single replacement string, making 31 // the memory pointed to by argv[0] with a single replacement string, making
32 // sure its size does not exceed the available space. 32 // sure its size does not exceed the available space.
33 // 33 //
34 // It is perhaps worth noting that patches to add a system call to Linux for 34 // It is perhaps worth noting that patches to add a system call to Linux for
35 // this, like in BSD, have never made it in: this is the "official" way to do 35 // this, like in BSD, have never made it in: this is the "official" way to do
36 // this on Linux. Presumably it is not in glibc due to some disagreement over 36 // this on Linux. Presumably it is not in glibc due to some disagreement over
37 // this position within the glibc project, leaving applications caught in the 37 // this position within the glibc project, leaving applications caught in the
38 // middle. (Also, only a very few applications need or want this anyway.) 38 // middle. (Also, only a very few applications need or want this anyway.)
39 39
40 #include "base/setproctitle_linux.h" 40 #include "chrome/common/set_process_title_linux.h"
41 41
42 #include <stdarg.h> 42 #include <stdarg.h>
43 #include <stdint.h> 43 #include <stdint.h>
44 #include <stdio.h> 44 #include <stdio.h>
45 #include <string.h> 45 #include <string.h>
46 #include <unistd.h> 46 #include <unistd.h>
47 47
48 extern char** environ; 48 extern char** environ;
49 49
50 static char** g_main_argv = NULL; 50 static char** g_main_argv = NULL;
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106 void setproctitle_init(char** main_argv) { 106 void setproctitle_init(char** main_argv) {
107 if (g_main_argv) 107 if (g_main_argv)
108 return; 108 return;
109 109
110 uintptr_t page_size = sysconf(_SC_PAGESIZE); 110 uintptr_t page_size = sysconf(_SC_PAGESIZE);
111 // Check that the argv array is in fact on the same page of memory 111 // Check that the argv array is in fact on the same page of memory
112 // as the environment array just as an added measure of protection. 112 // as the environment array just as an added measure of protection.
113 if (((uintptr_t) environ) / page_size == ((uintptr_t) main_argv) / page_size) 113 if (((uintptr_t) environ) / page_size == ((uintptr_t) main_argv) / page_size)
114 g_main_argv = main_argv; 114 g_main_argv = main_argv;
115 } 115 }
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