FreeRDP/winpr/libwinpr/thread/process.c

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/**
* WinPR: Windows Portable Runtime
* Process Thread Functions
*
* Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
* Copyright 2014 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
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*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <winpr/handle.h>
#include "../handle/nonehandle.h"
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#include <winpr/thread.h>
#include <fcntl.h>
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/**
* CreateProcessA
* CreateProcessW
* CreateProcessAsUserA
* CreateProcessAsUserW
* ExitProcess
* GetCurrentProcess
* GetCurrentProcessId
* GetExitCodeProcess
* GetProcessHandleCount
* GetProcessId
* GetProcessIdOfThread
* GetProcessMitigationPolicy
* GetProcessTimes
* GetProcessVersion
* OpenProcess
* OpenProcessToken
* ProcessIdToSessionId
* SetProcessAffinityUpdateMode
* SetProcessMitigationPolicy
* SetProcessShutdownParameters
* TerminateProcess
*/
#ifndef _WIN32
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <winpr/crt.h>
#include <winpr/heap.h>
#include <winpr/path.h>
#include <winpr/tchar.h>
#include <winpr/environment.h>
#include <pwd.h>
#include <grp.h>
#include <errno.h>
#include <string.h>
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#include <signal.h>
#include <sys/wait.h>
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#include <sys/types.h>
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#include <pthread.h>
#include "thread.h"
#include "../handle/handle.h"
#include "../security/security.h"
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#ifndef NSIG
#ifdef SIGMAX
#define NSIG SIGMAX
#else
#define NSIG 64
#endif
#endif
char** EnvironmentBlockToEnvpA(LPCH lpszEnvironmentBlock)
{
char* p;
int index;
int count;
int length;
char** envp = NULL;
count = 0;
if (!lpszEnvironmentBlock)
return NULL;
p = (char*) lpszEnvironmentBlock;
while (p[0] && p[1])
{
length = strlen(p);
p += (length + 1);
count++;
}
index = 0;
p = (char*) lpszEnvironmentBlock;
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envp = (char**) calloc(count + 1, sizeof(char*));
if (!envp)
return NULL;
envp[count] = NULL;
while (p[0] && p[1])
{
length = strlen(p);
envp[index] = _strdup(p);
if (!envp[index])
{
for (index -= 1; index >= 0; --index)
{
free(envp[index]);
}
free(envp);
return NULL;
}
p += (length + 1);
index++;
}
return envp;
}
/**
* If the file name does not contain a directory path, the system searches for the executable file in the following sequence:
*
* 1) The directory from which the application loaded.
* 2) The current directory for the parent process.
* 3) The 32-bit Windows system directory. Use the GetSystemDirectory function to get the path of this directory.
* 4) The 16-bit Windows system directory. There is no function that obtains the path of this directory,
* but it is searched. The name of this directory is System.
* 5) The Windows directory. Use the GetWindowsDirectory function to get the path of this directory.
* 6) The directories that are listed in the PATH environment variable. Note that this function
* does not search the per-application path specified by the App Paths registry key. To include
* this per-application path in the search sequence, use the ShellExecute function.
*/
char* FindApplicationPath(char* application)
{
char* path;
char* save;
DWORD nSize;
LPSTR lpSystemPath;
char* filename = NULL;
if (!application)
return NULL;
if (application[0] == '/')
return _strdup(application);
nSize = GetEnvironmentVariableA("PATH", NULL, 0);
if (!nSize)
return _strdup(application);
lpSystemPath = (LPSTR) malloc(nSize);
if (!lpSystemPath)
return NULL;
nSize = GetEnvironmentVariableA("PATH", lpSystemPath, nSize);
save = NULL;
path = strtok_s(lpSystemPath, ":", &save);
while (path)
{
filename = GetCombinedPath(path, application);
if (PathFileExistsA(filename))
{
break;
}
free(filename);
filename = NULL;
path = strtok_s(NULL, ":", &save);
}
free(lpSystemPath);
return filename;
}
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static HANDLE CreateProcessHandle(pid_t pid);
static BOOL ProcessHandleCloseHandle(HANDLE handle);
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BOOL _CreateProcessExA(HANDLE hToken, DWORD dwLogonFlags,
LPCSTR lpApplicationName, LPSTR lpCommandLine, LPSECURITY_ATTRIBUTES lpProcessAttributes,
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LPSECURITY_ATTRIBUTES lpThreadAttributes, BOOL bInheritHandles, DWORD dwCreationFlags, LPVOID lpEnvironment,
LPCSTR lpCurrentDirectory, LPSTARTUPINFOA lpStartupInfo, LPPROCESS_INFORMATION lpProcessInformation)
{
pid_t pid;
int flags;
int numArgs;
LPSTR* pArgs = NULL;
char** envp = NULL;
char* filename = NULL;
HANDLE thread;
HANDLE process;
WINPR_ACCESS_TOKEN* token;
LPTCH lpszEnvironmentBlock;
BOOL ret = FALSE;
sigset_t oldSigMask;
sigset_t newSigMask;
BOOL restoreSigMask = FALSE;
pid = 0;
numArgs = 0;
lpszEnvironmentBlock = NULL;
pArgs = CommandLineToArgvA(lpCommandLine, &numArgs);
if (!pArgs)
return FALSE;
flags = 0;
token = (WINPR_ACCESS_TOKEN*) hToken;
if (lpEnvironment)
{
envp = EnvironmentBlockToEnvpA(lpEnvironment);
}
else
{
lpszEnvironmentBlock = GetEnvironmentStrings();
if (!lpszEnvironmentBlock)
goto finish;
envp = EnvironmentBlockToEnvpA(lpszEnvironmentBlock);
}
if (!envp)
goto finish;
filename = FindApplicationPath(pArgs[0]);
if (NULL == filename)
goto finish;
/* block all signals so that the child can safely reset the caller's handlers */
sigfillset(&newSigMask);
restoreSigMask = !pthread_sigmask(SIG_SETMASK, &newSigMask, &oldSigMask);
/* fork and exec */
pid = fork();
if (pid < 0)
{
/* fork failure */
goto finish;
}
if (pid == 0)
{
/* child process */
#ifndef __sun
int maxfd;
#endif
int fd;
int sig;
sigset_t set;
struct sigaction act;
/* set default signal handlers */
memset(&act, 0, sizeof(act));
act.sa_handler = SIG_DFL;
act.sa_flags = 0;
sigemptyset(&act.sa_mask);
for (sig = 1; sig < NSIG; sig++)
sigaction(sig, &act, NULL);
/* unblock all signals */
sigfillset(&set);
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
if (lpStartupInfo)
{
int handle_fd;
handle_fd = winpr_Handle_getFd(lpStartupInfo->hStdOutput);
if (handle_fd != -1)
dup2(handle_fd, STDOUT_FILENO);
handle_fd = winpr_Handle_getFd(lpStartupInfo->hStdError);
if (handle_fd != -1)
dup2(handle_fd, STDERR_FILENO);
handle_fd = winpr_Handle_getFd(lpStartupInfo->hStdInput);
if (handle_fd != -1)
dup2(handle_fd, STDIN_FILENO);
}
#ifdef __sun
closefrom(3);
#else
#ifdef F_MAXFD // on some BSD derivates
maxfd = fcntl(0, F_MAXFD);
#else
maxfd = sysconf(_SC_OPEN_MAX);
#endif
for(fd=3; fd<maxfd; fd++)
close(fd);
#endif // __sun
if (token)
{
if (token->GroupId)
{
int rc = setgid((gid_t) token->GroupId);
if (rc < 0)
{
}
else
{
initgroups(token->Username, (gid_t) token->GroupId);
}
}
if (token->UserId)
setuid((uid_t) token->UserId);
}
/* TODO: add better cwd handling and error checking */
if (lpCurrentDirectory && strlen(lpCurrentDirectory) > 0)
chdir(lpCurrentDirectory);
if (execve(filename, pArgs, envp) < 0)
{
/* execve failed - end the process */
_exit(1);
}
}
else
{
/* parent process */
}
process = CreateProcessHandle(pid);
if (!process)
{
goto finish;
}
thread = CreateNoneHandle();
if (!thread)
{
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ProcessHandleCloseHandle(process);
goto finish;
}
lpProcessInformation->hProcess = process;
lpProcessInformation->hThread = thread;
lpProcessInformation->dwProcessId = (DWORD) pid;
lpProcessInformation->dwThreadId = (DWORD) pid;
ret = TRUE;
finish:
/* restore caller's original signal mask */
if (restoreSigMask)
pthread_sigmask(SIG_SETMASK, &oldSigMask, NULL);
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free(filename);
if (pArgs)
{
HeapFree(GetProcessHeap(), 0, pArgs);
}
if (lpszEnvironmentBlock)
FreeEnvironmentStrings(lpszEnvironmentBlock);
if (envp)
{
int i = 0;
while (envp[i])
{
free(envp[i]);
i++;
}
free(envp);
}
return ret;
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}
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BOOL CreateProcessA(LPCSTR lpApplicationName, LPSTR lpCommandLine, LPSECURITY_ATTRIBUTES lpProcessAttributes,
LPSECURITY_ATTRIBUTES lpThreadAttributes, BOOL bInheritHandles, DWORD dwCreationFlags, LPVOID lpEnvironment,
LPCSTR lpCurrentDirectory, LPSTARTUPINFOA lpStartupInfo, LPPROCESS_INFORMATION lpProcessInformation)
{
return _CreateProcessExA(NULL, 0,
lpApplicationName, lpCommandLine, lpProcessAttributes,
lpThreadAttributes, bInheritHandles, dwCreationFlags, lpEnvironment,
lpCurrentDirectory, lpStartupInfo, lpProcessInformation);
}
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BOOL CreateProcessW(LPCWSTR lpApplicationName, LPWSTR lpCommandLine, LPSECURITY_ATTRIBUTES lpProcessAttributes,
LPSECURITY_ATTRIBUTES lpThreadAttributes, BOOL bInheritHandles, DWORD dwCreationFlags, LPVOID lpEnvironment,
LPCWSTR lpCurrentDirectory, LPSTARTUPINFOW lpStartupInfo, LPPROCESS_INFORMATION lpProcessInformation)
{
return TRUE;
}
BOOL CreateProcessAsUserA(HANDLE hToken, LPCSTR lpApplicationName, LPSTR lpCommandLine, LPSECURITY_ATTRIBUTES lpProcessAttributes,
LPSECURITY_ATTRIBUTES lpThreadAttributes, BOOL bInheritHandles, DWORD dwCreationFlags, LPVOID lpEnvironment,
LPCSTR lpCurrentDirectory, LPSTARTUPINFOA lpStartupInfo, LPPROCESS_INFORMATION lpProcessInformation)
{
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return _CreateProcessExA(hToken, 0,
lpApplicationName, lpCommandLine, lpProcessAttributes,
lpThreadAttributes, bInheritHandles, dwCreationFlags, lpEnvironment,
lpCurrentDirectory, lpStartupInfo, lpProcessInformation);
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}
BOOL CreateProcessAsUserW(HANDLE hToken, LPCWSTR lpApplicationName, LPWSTR lpCommandLine, LPSECURITY_ATTRIBUTES lpProcessAttributes,
LPSECURITY_ATTRIBUTES lpThreadAttributes, BOOL bInheritHandles, DWORD dwCreationFlags, LPVOID lpEnvironment,
LPCWSTR lpCurrentDirectory, LPSTARTUPINFOW lpStartupInfo, LPPROCESS_INFORMATION lpProcessInformation)
{
return TRUE;
}
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BOOL CreateProcessWithLogonA(LPCSTR lpUsername, LPCSTR lpDomain, LPCSTR lpPassword, DWORD dwLogonFlags,
LPCSTR lpApplicationName, LPSTR lpCommandLine, DWORD dwCreationFlags, LPVOID lpEnvironment,
LPCSTR lpCurrentDirectory, LPSTARTUPINFOA lpStartupInfo, LPPROCESS_INFORMATION lpProcessInformation)
{
return TRUE;
}
BOOL CreateProcessWithLogonW(LPCWSTR lpUsername, LPCWSTR lpDomain, LPCWSTR lpPassword, DWORD dwLogonFlags,
LPCWSTR lpApplicationName, LPWSTR lpCommandLine, DWORD dwCreationFlags, LPVOID lpEnvironment,
LPCWSTR lpCurrentDirectory, LPSTARTUPINFOW lpStartupInfo, LPPROCESS_INFORMATION lpProcessInformation)
{
return TRUE;
}
BOOL CreateProcessWithTokenA(HANDLE hToken, DWORD dwLogonFlags,
LPCSTR lpApplicationName, LPSTR lpCommandLine, DWORD dwCreationFlags, LPVOID lpEnvironment,
LPCSTR lpCurrentDirectory, LPSTARTUPINFOA lpStartupInfo, LPPROCESS_INFORMATION lpProcessInformation)
{
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return _CreateProcessExA(NULL, 0,
lpApplicationName, lpCommandLine, NULL,
NULL, FALSE, dwCreationFlags, lpEnvironment,
lpCurrentDirectory, lpStartupInfo, lpProcessInformation);
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}
BOOL CreateProcessWithTokenW(HANDLE hToken, DWORD dwLogonFlags,
LPCWSTR lpApplicationName, LPWSTR lpCommandLine, DWORD dwCreationFlags, LPVOID lpEnvironment,
LPCWSTR lpCurrentDirectory, LPSTARTUPINFOW lpStartupInfo, LPPROCESS_INFORMATION lpProcessInformation)
{
return TRUE;
}
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VOID ExitProcess(UINT uExitCode)
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{
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exit((int) uExitCode);
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}
BOOL GetExitCodeProcess(HANDLE hProcess, LPDWORD lpExitCode)
{
WINPR_PROCESS* process;
if (!hProcess)
return FALSE;
if (!lpExitCode)
return FALSE;
process = (WINPR_PROCESS*) hProcess;
*lpExitCode = process->dwExitCode;
return TRUE;
}
HANDLE _GetCurrentProcess(VOID)
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{
return NULL;
}
DWORD GetCurrentProcessId(VOID)
{
return ((DWORD) getpid());
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}
DWORD GetProcessId(HANDLE Process)
{
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WINPR_PROCESS* process;
process = (WINPR_PROCESS*) Process;
if (!process)
return 0;
return (DWORD) process->pid;
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}
BOOL TerminateProcess(HANDLE hProcess, UINT uExitCode)
{
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WINPR_PROCESS* process;
process = (WINPR_PROCESS*) hProcess;
if (!process || (process->pid <= 0))
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return FALSE;
if (kill(process->pid, SIGTERM))
return FALSE;
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return TRUE;
}
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BOOL ProcessHandleCloseHandle(HANDLE handle)
{
WINPR_PROCESS* process = (WINPR_PROCESS*) handle;
free(process);
return TRUE;
}
static BOOL ProcessHandleIsHandle(HANDLE handle)
{
WINPR_PROCESS* process = (WINPR_PROCESS*) handle;
if (!process || process->Type != HANDLE_TYPE_PROCESS)
{
SetLastError(ERROR_INVALID_HANDLE);
return FALSE;
}
return TRUE;
}
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static int ProcessGetFd(HANDLE handle)
{
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WINPR_PROCESS *process = (WINPR_PROCESS *)handle;
if (!ProcessHandleIsHandle(handle))
return -1;
/* TODO: Process does not support fd... */
(void)process;
return -1;
}
static HANDLE_OPS ops = {
ProcessHandleIsHandle,
ProcessHandleCloseHandle,
ProcessGetFd,
NULL /* CleanupHandle */
};
HANDLE CreateProcessHandle(pid_t pid)
{
WINPR_PROCESS* process;
process = (WINPR_PROCESS*) calloc(1, sizeof(WINPR_PROCESS));
if (!process)
return NULL;
process->pid = pid;
process->Type = HANDLE_TYPE_PROCESS;
process->ops = &ops;
return (HANDLE)process;
}
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#endif