launch.h revision a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7
19ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Copyright (c) 2013 The Chromium Authors. All rights reserved. 29ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Use of this source code is governed by a BSD-style license that can be 39ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// found in the LICENSE file. 49ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 59ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// This file contains functions for launching subprocesses. 69ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 79ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#ifndef BASE_PROCESS_LAUNCH_H_ 89ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#define BASE_PROCESS_LAUNCH_H_ 99ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 109ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include <set> 119ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include <string> 129ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include <utility> 139ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include <vector> 149ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 159ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include "base/base_export.h" 169ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include "base/basictypes.h" 1758537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles)#include "base/environment.h" 189ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include "base/process/process_handle.h" 19a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)#include "base/strings/string_piece.h" 209ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 219ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#if defined(OS_POSIX) 229ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include "base/posix/file_descriptor_shuffle.h" 239ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#elif defined(OS_WIN) 249ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include <windows.h> 25f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "base/win/scoped_handle.h" 269ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#endif 279ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 289ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdochclass CommandLine; 299ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 309ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdochnamespace base { 319ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 329ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdochtypedef std::vector<std::pair<int, int> > FileHandleMappingVector; 339ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 349ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Options for launching a subprocess that are passed to LaunchProcess(). 359ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// The default constructor constructs the object with default options. 3658537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles)struct BASE_EXPORT LaunchOptions { 3758537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles) LaunchOptions(); 3858537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles) ~LaunchOptions(); 399ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 409ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // If true, wait for the process to complete. 419ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch bool wait; 429ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 439ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#if defined(OS_WIN) 449ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch bool start_hidden; 459ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 469ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // If true, the new process inherits handles from the parent. In production 479ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // code this flag should be used only when running short-lived, trusted 489ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // binaries, because open handles from other libraries and subsystems will 499ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // leak to the child process, causing errors such as open socket hangs. 509ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch bool inherit_handles; 519ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 529ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // If non-NULL, runs as if the user represented by the token had launched it. 539ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // Whether the application is visible on the interactive desktop depends on 549ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // the token belonging to an interactive logon session. 559ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // 569ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // To avoid hard to diagnose problems, when specified this loads the 579ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // environment variables associated with the user and if this operation fails 589ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // the entire call fails as well. 599ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch UserTokenHandle as_user; 609ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 619ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // If true, use an empty string for the desktop name. 629ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch bool empty_desktop_name; 639ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 649ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // If non-NULL, launches the application in that job object. The process will 659ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // be terminated immediately and LaunchProcess() will fail if assignment to 669ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // the job object fails. 679ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch HANDLE job_handle; 689ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 699ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // Handles for the redirection of stdin, stdout and stderr. The handles must 709ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // be inheritable. Caller should either set all three of them or none (i.e. 719ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // there is no way to redirect stderr without redirecting stdin). The 729ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // |inherit_handles| flag must be set to true when redirecting stdio stream. 739ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch HANDLE stdin_handle; 749ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch HANDLE stdout_handle; 759ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch HANDLE stderr_handle; 769ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 779ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // If set to true, ensures that the child process is launched with the 789ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // CREATE_BREAKAWAY_FROM_JOB flag which allows it to breakout of the parent 799ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // job if any. 809ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch bool force_breakaway_from_job_; 819ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#else 8258537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles) // Set/unset environment variables. Empty (the default) means to inherit 8358537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles) // the same environment. See AlterEnvironment(). 8458537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles) EnvironmentMap environ; 859ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 869ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // If non-NULL, remap file descriptors according to the mapping of 879ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // src fd->dest fd to propagate FDs into the child process. 889ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // This pointer is owned by the caller and must live through the 899ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // call to LaunchProcess(). 909ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch const FileHandleMappingVector* fds_to_remap; 919ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 929ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // Each element is an RLIMIT_* constant that should be raised to its 939ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // rlim_max. This pointer is owned by the caller and must live through 949ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // the call to LaunchProcess(). 959ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch const std::set<int>* maximize_rlimits; 969ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 979ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // If true, start the process in a new process group, instead of 989ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // inheriting the parent's process group. The pgid of the child process 999ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // will be the same as its pid. 1009ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch bool new_process_group; 1019ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 1029ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#if defined(OS_LINUX) 1039ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // If non-zero, start the process using clone(), using flags as provided. 1049ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch int clone_flags; 1059ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#endif // defined(OS_LINUX) 1069ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 1079ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#if defined(OS_CHROMEOS) 1089ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // If non-negative, the specified file descriptor will be set as the launched 1099ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch // process' controlling terminal. 1109ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch int ctrl_terminal_fd; 1119ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#endif // defined(OS_CHROMEOS) 1129ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 1139ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#endif // !defined(OS_WIN) 1149ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch}; 1159ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 1169ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Launch a process via the command line |cmdline|. 1179ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// See the documentation of LaunchOptions for details on |options|. 1189ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// 1199ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Returns true upon success. 1209ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// 1219ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Upon success, if |process_handle| is non-NULL, it will be filled in with the 1229ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// handle of the launched process. NOTE: In this case, the caller is 1239ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// responsible for closing the handle so that it doesn't leak! 1249ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Otherwise, the process handle will be implicitly closed. 1259ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// 1269ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Unix-specific notes: 1279ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// - All file descriptors open in the parent process will be closed in the 1289ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// child process except for any preserved by options::fds_to_remap, and 1299ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// stdin, stdout, and stderr. If not remapped by options::fds_to_remap, 1309ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// stdin is reopened as /dev/null, and the child is allowed to inherit its 1319ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// parent's stdout and stderr. 1329ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// - If the first argument on the command line does not contain a slash, 1339ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// PATH will be searched. (See man execvp.) 1349ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben MurdochBASE_EXPORT bool LaunchProcess(const CommandLine& cmdline, 1359ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch const LaunchOptions& options, 1369ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch ProcessHandle* process_handle); 1379ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 1389ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#if defined(OS_WIN) 1399ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Windows-specific LaunchProcess that takes the command line as a 1409ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// string. Useful for situations where you need to control the 1419ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// command line arguments directly, but prefer the CommandLine version 1429ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// if launching Chrome itself. 1439ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// 1449ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// The first command line argument should be the path to the process, 1459ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// and don't forget to quote it. 1469ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// 1479ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Example (including literal quotes) 1489ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// cmdline = "c:\windows\explorer.exe" -foo "c:\bar\" 1499ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben MurdochBASE_EXPORT bool LaunchProcess(const string16& cmdline, 1509ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch const LaunchOptions& options, 151f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) win::ScopedHandle* process_handle); 1529ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 1539ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#elif defined(OS_POSIX) 1549ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// A POSIX-specific version of LaunchProcess that takes an argv array 1559ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// instead of a CommandLine. Useful for situations where you need to 1569ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// control the command line arguments directly, but prefer the 1579ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// CommandLine version if launching Chrome itself. 1589ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben MurdochBASE_EXPORT bool LaunchProcess(const std::vector<std::string>& argv, 1599ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch const LaunchOptions& options, 1609ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch ProcessHandle* process_handle); 1619ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 1629ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Close all file descriptors, except those which are a destination in the 1639ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// given multimap. Only call this function in a child process where you know 1649ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// that there aren't any other threads. 1659ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben MurdochBASE_EXPORT void CloseSuperfluousFds(const InjectiveMultimap& saved_map); 1669ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#endif // defined(OS_POSIX) 1679ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 1689ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#if defined(OS_WIN) 169d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)// Set |job_object|'s JOBOBJECT_EXTENDED_LIMIT_INFORMATION 170d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)// BasicLimitInformation.LimitFlags to |limit_flags|. 171d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)BASE_EXPORT bool SetJobObjectLimitFlags(HANDLE job_object, DWORD limit_flags); 1729ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 1739ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Output multi-process printf, cout, cerr, etc to the cmd.exe console that ran 1749ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// chrome. This is not thread-safe: only call from main thread. 1759ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben MurdochBASE_EXPORT void RouteStdioToConsole(); 1769ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#endif // defined(OS_WIN) 1779ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 1789ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Executes the application specified by |cl| and wait for it to exit. Stores 1799ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// the output (stdout) in |output|. Redirects stderr to /dev/null. Returns true 1809ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// on success (application launched and exited cleanly, with exit code 1819ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// indicating success). 1829ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben MurdochBASE_EXPORT bool GetAppOutput(const CommandLine& cl, std::string* output); 1839ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 184a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)#if defined(OS_WIN) 185a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)// A Windows-specific version of GetAppOutput that takes a command line string 186a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)// instead of a CommandLine object. Useful for situations where you need to 187a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)// control the command line arguments directly. 188a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)BASE_EXPORT bool GetAppOutput(const StringPiece16& cl, std::string* output); 189a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)#endif 190a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 1919ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#if defined(OS_POSIX) 1929ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// A POSIX-specific version of GetAppOutput that takes an argv array 1939ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// instead of a CommandLine. Useful for situations where you need to 1949ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// control the command line arguments directly. 1959ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben MurdochBASE_EXPORT bool GetAppOutput(const std::vector<std::string>& argv, 1969ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch std::string* output); 1979ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 1989ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// A restricted version of |GetAppOutput()| which (a) clears the environment, 1999ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// and (b) stores at most |max_output| bytes; also, it doesn't search the path 2009ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// for the command. 2019ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben MurdochBASE_EXPORT bool GetAppOutputRestricted(const CommandLine& cl, 2029ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch std::string* output, size_t max_output); 2039ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 2049ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// A version of |GetAppOutput()| which also returns the exit code of the 2059ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// executed command. Returns true if the application runs and exits cleanly. If 2069ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// this is the case the exit code of the application is available in 2079ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// |*exit_code|. 2089ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben MurdochBASE_EXPORT bool GetAppOutputWithExitCode(const CommandLine& cl, 2099ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch std::string* output, int* exit_code); 2109ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#endif // defined(OS_POSIX) 2119ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 2129ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// If supported on the platform, and the user has sufficent rights, increase 2139ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// the current process's scheduling priority to a high priority. 2149ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben MurdochBASE_EXPORT void RaiseProcessToHighPriority(); 2159ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 2169ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#if defined(OS_MACOSX) 2179ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// Restore the default exception handler, setting it to Apple Crash Reporter 2189ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// (ReportCrash). When forking and execing a new process, the child will 2199ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// inherit the parent's exception ports, which may be set to the Breakpad 2209ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// instance running inside the parent. The parent's Breakpad instance should 2219ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// not handle the child's exceptions. Calling RestoreDefaultExceptionHandler 2229ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// in the child after forking will restore the standard exception handler. 2239ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch// See http://crbug.com/20371/ for more details. 2249ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdochvoid RestoreDefaultExceptionHandler(); 2259ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#endif // defined(OS_MACOSX) 2269ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 2279ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch} // namespace base 2289ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch 2299ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#endif // BASE_PROCESS_LAUNCH_H_ 230