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// Copyright (c) 2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/process_util.h"
#import <Cocoa/Cocoa.h>
#include <crt_externs.h>
#include <spawn.h>
#include <sys/wait.h>
#include <string>
#include "base/eintr_wrapper.h"
#include "base/logging.h"
#include "base/rand_util.h"
#include "base/string_util.h"
#include "base/time.h"
namespace {
static mozilla::EnvironmentLog gProcessLog("MOZ_PROCESS_LOG");
} // namespace
namespace base {
void FreeEnvVarsArray(char* array[], int length)
{
for (int i = 0; i < length; i++) {
free(array[i]);
}
delete[] array;
}
bool LaunchApp(const std::vector<std::string>& argv,
const file_handle_mapping_vector& fds_to_remap,
bool wait, ProcessHandle* process_handle) {
return LaunchApp(argv, fds_to_remap, environment_map(),
wait, process_handle);
}
bool LaunchApp(const std::vector<std::string>& argv,
const file_handle_mapping_vector& fds_to_remap,
const environment_map& env_vars_to_set,
bool wait, ProcessHandle* process_handle,
ProcessArchitecture arch) {
return LaunchApp(argv, fds_to_remap, env_vars_to_set,
PRIVILEGES_INHERIT,
wait, process_handle);
}
bool LaunchApp(const std::vector<std::string>& argv,
const file_handle_mapping_vector& fds_to_remap,
const environment_map& env_vars_to_set,
ChildPrivileges privs,
bool wait, ProcessHandle* process_handle,
ProcessArchitecture arch) {
bool retval = true;
char* argv_copy[argv.size() + 1];
for (size_t i = 0; i < argv.size(); i++) {
argv_copy[i] = const_cast<char*>(argv[i].c_str());
}
argv_copy[argv.size()] = NULL;
// Make sure we don't leak any FDs to the child process by marking all FDs
// as close-on-exec.
SetAllFDsToCloseOnExec();
// Copy _NSGetEnviron() to a new char array and add the variables
// in env_vars_to_set.
// Existing variables are overwritten by env_vars_to_set.
int pos = 0;
environment_map combined_env_vars = env_vars_to_set;
while((*_NSGetEnviron())[pos] != NULL) {
std::string varString = (*_NSGetEnviron())[pos];
std::string varName = varString.substr(0, varString.find_first_of('='));
std::string varValue = varString.substr(varString.find_first_of('=') + 1);
if (combined_env_vars.find(varName) == combined_env_vars.end()) {
combined_env_vars[varName] = varValue;
}
pos++;
}
int varsLen = combined_env_vars.size() + 1;
char** vars = new char*[varsLen];
int i = 0;
for (environment_map::const_iterator it = combined_env_vars.begin();
it != combined_env_vars.end(); ++it) {
std::string entry(it->first);
entry += "=";
entry += it->second;
vars[i] = strdup(entry.c_str());
i++;
}
vars[i] = NULL;
posix_spawn_file_actions_t file_actions;
if (posix_spawn_file_actions_init(&file_actions) != 0) {
FreeEnvVarsArray(vars, varsLen);
return false;
}
// Turn fds_to_remap array into a set of dup2 calls.
for (file_handle_mapping_vector::const_iterator it = fds_to_remap.begin();
it != fds_to_remap.end();
++it) {
int src_fd = it->first;
int dest_fd = it->second;
if (src_fd == dest_fd) {
int flags = fcntl(src_fd, F_GETFD);
if (flags != -1) {
fcntl(src_fd, F_SETFD, flags & ~FD_CLOEXEC);
}
} else {
if (posix_spawn_file_actions_adddup2(&file_actions, src_fd, dest_fd) != 0) {
posix_spawn_file_actions_destroy(&file_actions);
FreeEnvVarsArray(vars, varsLen);
return false;
}
}
}
// Set up the CPU preference array.
cpu_type_t cpu_types[1];
switch (arch) {
case PROCESS_ARCH_I386:
cpu_types[0] = CPU_TYPE_X86;
break;
case PROCESS_ARCH_X86_64:
cpu_types[0] = CPU_TYPE_X86_64;
break;
case PROCESS_ARCH_PPC:
cpu_types[0] = CPU_TYPE_POWERPC;
break;
default:
cpu_types[0] = CPU_TYPE_ANY;
break;
}
// Initialize spawn attributes.
posix_spawnattr_t spawnattr;
if (posix_spawnattr_init(&spawnattr) != 0) {
FreeEnvVarsArray(vars, varsLen);
return false;
}
// Set spawn attributes.
size_t attr_count = 1;
size_t attr_ocount = 0;
if (posix_spawnattr_setbinpref_np(&spawnattr, attr_count, cpu_types, &attr_ocount) != 0 ||
attr_ocount != attr_count) {
FreeEnvVarsArray(vars, varsLen);
posix_spawnattr_destroy(&spawnattr);
return false;
}
int pid = 0;
int spawn_succeeded = (posix_spawnp(&pid,
argv_copy[0],
&file_actions,
&spawnattr,
argv_copy,
vars) == 0);
FreeEnvVarsArray(vars, varsLen);
posix_spawn_file_actions_destroy(&file_actions);
posix_spawnattr_destroy(&spawnattr);
bool process_handle_valid = pid > 0;
if (!spawn_succeeded || !process_handle_valid) {
retval = false;
} else {
gProcessLog.print("==> process %d launched child process %d\n",
GetCurrentProcId(), pid);
if (wait)
HANDLE_EINTR(waitpid(pid, 0, 0));
if (process_handle)
*process_handle = pid;
}
return retval;
}
bool LaunchApp(const CommandLine& cl,
bool wait, bool start_hidden, ProcessHandle* process_handle) {
// TODO(playmobil): Do we need to respect the start_hidden flag?
file_handle_mapping_vector no_files;
return LaunchApp(cl.argv(), no_files, wait, process_handle);
}
void SetCurrentProcessPrivileges(ChildPrivileges privs) {
}
} // namespace base
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