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1 // Copyright (c) 2010 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 "chrome/common/set_process_title.h" | |
6 | |
7 #include "base/command_line.h" | |
8 #include "base/file_path.h" | |
9 #include "base/file_util.h" | |
10 #include "base/string_util.h" | |
11 #include "build/build_config.h" | |
12 | |
13 #if defined(OS_POSIX) | |
14 #include <limits.h> | |
15 #include <stdlib.h> | |
16 #include <unistd.h> | |
17 #endif | |
18 | |
19 #if defined(OS_LINUX) | |
20 #include <sys/prctl.h> | |
21 | |
22 // Linux/glibc doesn't natively have setproctitle(). | |
23 #include "chrome/common/set_process_title_linux.h" | |
24 #endif | |
25 | |
26 #if defined(OS_POSIX) && !defined(OS_MACOSX) | |
27 | |
28 void SetProcessTitleFromCommandLine(char** main_argv) { | |
29 // Build a single string which consists of all the arguments separated | |
30 // by spaces. We can't actually keep them separate due to the way the | |
31 // setproctitle() function works. | |
32 std::string title; | |
33 bool have_argv0 = false; | |
34 | |
35 #if defined(OS_LINUX) | |
36 if (main_argv) | |
37 setproctitle_init(main_argv); | |
38 | |
39 // In Linux we sometimes exec ourselves from /proc/self/exe, but this makes us | |
40 // show up as "exe" in process listings. Read the symlink /proc/self/exe and | |
41 // use the path it points at for our process title. Note that this is only for | |
42 // display purposes and has no TOCTTOU security implications. | |
43 FilePath target; | |
44 FilePath self_exe("/proc/self/exe"); | |
45 if (file_util::ReadSymbolicLink(self_exe, &target)) { | |
46 have_argv0 = true; | |
47 title = target.value(); | |
48 // If the binary has since been deleted, Linux appends " (deleted)" to the | |
49 // symlink target. Remove it, since this is not really part of our name. | |
50 const std::string kDeletedSuffix = " (deleted)"; | |
51 if (EndsWith(title, kDeletedSuffix, true)) | |
52 title.resize(title.size() - kDeletedSuffix.size()); | |
53 #if defined(PR_SET_NAME) | |
54 // If PR_SET_NAME is available at compile time, we try using it. We ignore | |
55 // any errors if the kernel does not support it at runtime though. When | |
56 // available, this lets us set the short process name that shows when the | |
57 // full command line is not being displayed in most process listings. | |
58 prctl(PR_SET_NAME, FilePath(title).BaseName().value().c_str()); | |
59 #endif | |
60 } | |
61 #endif | |
62 | |
63 const CommandLine* command_line = CommandLine::ForCurrentProcess(); | |
64 for (size_t i = 1; i < command_line->argv().size(); ++i) { | |
65 if (!title.empty()) | |
66 title += " "; | |
67 title += command_line->argv()[i]; | |
68 } | |
69 // Disable prepending argv[0] with '-' if we prepended it ourselves above. | |
70 setproctitle(have_argv0 ? "-%s" : "%s", title.c_str()); | |
71 } | |
72 | |
73 #else | |
74 | |
75 // All other systems (basically Windows & Mac) have no need or way to implement | |
76 // this function. | |
77 void SetProcessTitleFromCommandLine(char** /* main_argv */) { | |
78 } | |
79 | |
80 #endif | |
81 | |
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