set_process_title.cc revision 5821806d5e7f356e8fa4b058a389a808ea183019
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/common/set_process_title.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "build/build_config.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_SOLARIS) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <limits.h> 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <stdlib.h> 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <unistd.h> 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <string> 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/command_line.h" 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_SOLARIS) 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_LINUX) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <sys/prctl.h> 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/file_path.h" 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/file_util.h" 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/process_util.h" 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/string_util.h" 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Linux/glibc doesn't natively have setproctitle(). 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/common/set_process_title_linux.h" 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // defined(OS_LINUX) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace content { 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO(jrg): Find out if setproctitle or equivalent is available on Android. 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_SOLARIS) && \ 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) !defined(OS_ANDROID) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void SetProcessTitleFromCommandLine(const char** main_argv) { 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Build a single string which consists of all the arguments separated 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // by spaces. We can't actually keep them separate due to the way the 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // setproctitle() function works. 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string title; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool have_argv0 = false; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_LINUX) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (main_argv) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) setproctitle_init(main_argv); 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // In Linux we sometimes exec ourselves from /proc/self/exe, but this makes us 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // show up as "exe" in process listings. Read the symlink /proc/self/exe and 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // use the path it points at for our process title. Note that this is only for 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // display purposes and has no TOCTTOU security implications. 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath target; 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath self_exe(base::kProcSelfExe); 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (file_util::ReadSymbolicLink(self_exe, &target)) { 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) have_argv0 = true; 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) title = target.value(); 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If the binary has since been deleted, Linux appends " (deleted)" to the 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // symlink target. Remove it, since this is not really part of our name. 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::string kDeletedSuffix = " (deleted)"; 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (EndsWith(title, kDeletedSuffix, true)) 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) title.resize(title.size() - kDeletedSuffix.size()); 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(PR_SET_NAME) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If PR_SET_NAME is available at compile time, we try using it. We ignore 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // any errors if the kernel does not support it at runtime though. When 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // available, this lets us set the short process name that shows when the 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // full command line is not being displayed in most process listings. 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) prctl(PR_SET_NAME, FilePath(title).BaseName().value().c_str()); 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // defined(PR_SET_NAME) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // defined(OS_LINUX) 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const CommandLine* command_line = CommandLine::ForCurrentProcess(); 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (size_t i = 1; i < command_line->argv().size(); ++i) { 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!title.empty()) 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) title += " "; 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) title += command_line->argv()[i]; 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Disable prepending argv[0] with '-' if we prepended it ourselves above. 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) setproctitle(have_argv0 ? "-%s" : "%s", title.c_str()); 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// All other systems (basically Windows & Mac) have no need or way to implement 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// this function. 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void SetProcessTitleFromCommandLine(const char** /* main_argv */) { 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace content 91