1 // Copyright (c) 2012 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 "content/common/set_process_title.h" 6 7 #include "build/build_config.h" 8 9 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_SOLARIS) 10 #include <limits.h> 11 #include <stdlib.h> 12 #include <unistd.h> 13 14 #include <string> 15 16 #include "base/command_line.h" 17 #endif // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_SOLARIS) 18 19 #if defined(OS_LINUX) 20 #include <sys/prctl.h> 21 22 #include "base/file_util.h" 23 #include "base/files/file_path.h" 24 #include "base/process/process_metrics.h" 25 #include "base/strings/string_util.h" 26 // Linux/glibc doesn't natively have setproctitle(). 27 #include "content/common/set_process_title_linux.h" 28 #endif // defined(OS_LINUX) 29 30 namespace content { 31 32 // TODO(jrg): Find out if setproctitle or equivalent is available on Android. 33 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_SOLARIS) && \ 34 !defined(OS_ANDROID) 35 36 void SetProcessTitleFromCommandLine(const char** main_argv) { 37 // Build a single string which consists of all the arguments separated 38 // by spaces. We can't actually keep them separate due to the way the 39 // setproctitle() function works. 40 std::string title; 41 bool have_argv0 = false; 42 43 #if defined(OS_LINUX) 44 if (main_argv) 45 setproctitle_init(main_argv); 46 47 // In Linux we sometimes exec ourselves from /proc/self/exe, but this makes us 48 // show up as "exe" in process listings. Read the symlink /proc/self/exe and 49 // use the path it points at for our process title. Note that this is only for 50 // display purposes and has no TOCTTOU security implications. 51 base::FilePath target; 52 base::FilePath self_exe(base::kProcSelfExe); 53 if (file_util::ReadSymbolicLink(self_exe, &target)) { 54 have_argv0 = true; 55 title = target.value(); 56 // If the binary has since been deleted, Linux appends " (deleted)" to the 57 // symlink target. Remove it, since this is not really part of our name. 58 const std::string kDeletedSuffix = " (deleted)"; 59 if (EndsWith(title, kDeletedSuffix, true)) 60 title.resize(title.size() - kDeletedSuffix.size()); 61 #if defined(PR_SET_NAME) 62 // If PR_SET_NAME is available at compile time, we try using it. We ignore 63 // any errors if the kernel does not support it at runtime though. When 64 // available, this lets us set the short process name that shows when the 65 // full command line is not being displayed in most process listings. 66 prctl(PR_SET_NAME, base::FilePath(title).BaseName().value().c_str()); 67 #endif // defined(PR_SET_NAME) 68 } 69 #endif // defined(OS_LINUX) 70 71 const CommandLine* command_line = CommandLine::ForCurrentProcess(); 72 for (size_t i = 1; i < command_line->argv().size(); ++i) { 73 if (!title.empty()) 74 title += " "; 75 title += command_line->argv()[i]; 76 } 77 // Disable prepending argv[0] with '-' if we prepended it ourselves above. 78 setproctitle(have_argv0 ? "-%s" : "%s", title.c_str()); 79 } 80 81 #else 82 83 // All other systems (basically Windows & Mac) have no need or way to implement 84 // this function. 85 void SetProcessTitleFromCommandLine(const char** /* main_argv */) { 86 } 87 88 #endif 89 90 } // namespace content 91
