/* spawn-w32.c - Fork and exec helpers for W32.
* Copyright (C) 2004, 2007-2009, 2010 Free Software Foundation, Inc.
* Copyright (C) 2004, 2006-2012, 2014-2017 g10 Code GmbH
*
* This file is part of Libgpg-error.
*
* Libgpg-error is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Libgpg-error is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <https://www.gnu.org/licenses/>.
* SPDX-License-Identifier: LGPL-2.1+
*
* This file was originally a part of GnuPG.
*/
#include <config.h>
#if !defined(HAVE_W32_SYSTEM) || defined (HAVE_W32CE_SYSTEM)
#error This code is only used on W32.
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#ifdef HAVE_SIGNAL_H
# include <signal.h>
#endif
#include <unistd.h>
#include <fcntl.h>
#ifdef HAVE_STAT
# include <sys/stat.h>
#endif
#define WIN32_LEAN_AND_MEAN /* We only need the OS core stuff. */
#include <windows.h>
#include "gpgrt-int.h"
/* Define to 1 do enable debugging. */
#define DEBUG_W32_SPAWN 0
/* It seems Vista doesn't grok X_OK and so fails access() tests.
* Previous versions interpreted X_OK as F_OK anyway, so we'll just
* use F_OK directly. */
#undef X_OK
#define X_OK F_OK
/* We assume that a HANDLE can be represented by an int which should
* be true for all i386 systems (HANDLE is defined as void *) and
* these are the only systems for which Windows is available. Further
* we assume that -1 denotes an invalid handle.
* FIXME: With Windows 64 this is no longer true.
*/
#define fd_to_handle(a) ((HANDLE)(a))
#define handle_to_fd(a) ((int)(a))
#define pid_to_handle(a) ((HANDLE)(a))
#define handle_to_pid(a) ((int)(a))
/* Return the maximum number of currently allowed open file
* descriptors. Only useful on POSIX systems but returns a value on
* other systems too. */
int
get_max_fds (void)
{
int max_fds = -1;
#ifdef OPEN_MAX
if (max_fds == -1)
max_fds = OPEN_MAX;
#endif
if (max_fds == -1)
max_fds = 256; /* Arbitrary limit. */
return max_fds;
}
/* Under Windows this is a dummy function. */
/* static void */
/* close_all_fds (int first, int *except) */
/* { */
/* (void)first; */
/* (void)except; */
/* } */
/* Returns an array with all currently open file descriptors. The end
* of the array is marked by -1. The caller needs to release this
* array using the *standard free* and not with xfree. This allow the
* use of this function right at startup even before libgcrypt has
* been initialized. Returns NULL on error and sets ERRNO
* accordingly. Note that fstat prints a warning to DebugView for all
* invalid fds which is a bit annoying. We actually do not need this
* function in real code (close_all_fds is a dummy anyway) but we keep
* it for use by t-exechelp.c. */
#if 0
int *
get_all_open_fds (void)
{
int *array;
size_t narray;
int fd, max_fd, idx;
#ifndef HAVE_STAT
array = calloc (1, sizeof *array);
if (array)
array[0] = -1;
#else /*HAVE_STAT*/
struct stat statbuf;
max_fd = get_max_fds ();
narray = 32; /* If you change this change also t-exechelp.c. */
array = calloc (narray, sizeof *array);
if (!array)
return NULL;
/* Note: The list we return is ordered. */
for (idx=0, fd=0; fd < max_fd; fd++)
if (!(fstat (fd, &statbuf) == -1 && errno == EBADF))
{
if (idx+1 >= narray)
{
int *tmp;
narray += (narray < 256)? 32:256;
tmp = realloc (array, narray * sizeof *array);
if (!tmp)
{
free (array);
return NULL;
}
array = tmp;
}
array[idx++] = fd;
}
array[idx] = -1;
#endif /*HAVE_STAT*/
return array;
}
#endif
/* Helper function to build_w32_commandline. */
static char *
build_w32_commandline_copy (char *buffer, const char *string)
{
char *p = buffer;
const char *s;
if (!*string) /* Empty string. */
p = stpcpy (p, "\"\"");
else if (strpbrk (string, " \t\n\v\f\""))
{
/* Need to do some kind of quoting. */
p = stpcpy (p, "\"");
for (s=string; *s; s++)
{
*p++ = *s;
if (*s == '\"')
*p++ = *s;
}
*p++ = '\"';
*p = 0;
}
else
p = stpcpy (p, string);
return p;
}
/* Build a command line for use with W32's CreateProcess. On success
* CMDLINE gets the address of a newly allocated string. */
static gpg_err_code_t
build_w32_commandline (const char *pgmname, const char * const *argv,
char **cmdline)
{
int i, n;
const char *s;
char *buf, *p;
*cmdline = NULL;
n = 0;
s = pgmname;
n += strlen (s) + 1 + 2; /* (1 space, 2 quoting */
for (; *s; s++)
if (*s == '\"')
n++; /* Need to double inner quotes. */
for (i=0; (s=argv[i]); i++)
{
n += strlen (s) + 1 + 2; /* (1 space, 2 quoting */
for (; *s; s++)
if (*s == '\"')
n++; /* Need to double inner quotes. */
}
n++;
buf = p = xtrymalloc (n);
if (!buf)
return _gpg_err_code_from_syserror ();
p = build_w32_commandline_copy (p, pgmname);
for (i=0; argv[i]; i++)
{
*p++ = ' ';
p = build_w32_commandline_copy (p, argv[i]);
}
*cmdline= buf;
return 0;
}
#define INHERIT_READ 1
#define INHERIT_WRITE 2
#define INHERIT_BOTH (INHERIT_READ|INHERIT_WRITE)
/* Create pipe. FLAGS indicates which ends are inheritable. */
static int
create_inheritable_pipe (HANDLE filedes[2], int flags)
{
HANDLE r, w;
SECURITY_ATTRIBUTES sec_attr;
memset (&sec_attr, 0, sizeof sec_attr );
sec_attr.nLength = sizeof sec_attr;
sec_attr.bInheritHandle = TRUE;
_gpgrt_pre_syscall ();
if (!CreatePipe (&r, &w, &sec_attr, 0))
{
_gpgrt_post_syscall ();
return -1;
}
_gpgrt_post_syscall ();
if ((flags & INHERIT_READ) == 0)
if (! SetHandleInformation (r, HANDLE_FLAG_INHERIT, 0))
goto fail;
if ((flags & INHERIT_WRITE) == 0)
if (! SetHandleInformation (w, HANDLE_FLAG_INHERIT, 0))
goto fail;
filedes[0] = r;
filedes[1] = w;
return 0;
fail:
_gpgrt_log_error ("SetHandleInformation failed: ec=%d\n",
(int)GetLastError ());
CloseHandle (r);
CloseHandle (w);
return -1;
}
static HANDLE
w32_open_null (int for_write)
{
HANDLE hfile;
hfile = CreateFileW (L"nul",
for_write? GENERIC_WRITE : GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, 0, NULL);
if (hfile == INVALID_HANDLE_VALUE)
_gpgrt_log_debug ("can't open 'nul': ec=%d\n", (int)GetLastError ());
return hfile;
}
static gpg_err_code_t
do_create_pipe_and_estream (int filedes[2],
estream_t *r_fp, int direction, int nonblock)
{
gpg_err_code_t err = 0;
int flags;
HANDLE fds[2];
gpgrt_syshd_t syshd;
if (direction < 0)
flags = INHERIT_WRITE;
else if (direction > 0)
flags = INHERIT_READ;
else
flags = INHERIT_BOTH;
filedes[0] = filedes[1] = -1;
err = GPG_ERR_GENERAL;
if (!create_inheritable_pipe (fds, flags))
{
filedes[0] = _open_osfhandle (handle_to_fd (fds[0]), O_RDONLY);
if (filedes[0] == -1)
{
_gpgrt_log_error ("failed to translate osfhandle %p\n", fds[0]);
CloseHandle (fds[1]);
}
else
{
filedes[1] = _open_osfhandle (handle_to_fd (fds[1]), O_APPEND);
if (filedes[1] == -1)
{
_gpgrt_log_error ("failed to translate osfhandle %p\n", fds[1]);
close (filedes[0]);
filedes[0] = -1;
CloseHandle (fds[1]);
}
else
err = 0;
}
}
if (! err && r_fp)
{
syshd.type = ES_SYSHD_HANDLE;
if (direction < 0)
{
syshd.u.handle = fds[0];
*r_fp = _gpgrt_sysopen (&syshd, nonblock? "r,nonblock" : "r");
}
else
{
syshd.u.handle = fds[1];
*r_fp = _gpgrt_sysopen (&syshd, nonblock? "w,nonblock" : "w");
}
if (!*r_fp)
{
err = _gpg_err_code_from_syserror ();
_gpgrt_log_error (_("error creating a stream for a pipe: %s\n"),
_gpg_strerror (err));
close (filedes[0]);
close (filedes[1]);
filedes[0] = filedes[1] = -1;
return err;
}
}
return err;
}
/* Create a pipe. The DIRECTION parameter gives the type of the created pipe:
* DIRECTION < 0 := Inbound pipe: On Windows the write end is inheritable.
* DIRECTION > 0 := Outbound pipe: On Windows the read end is inheritable.
* If R_FP is NULL a standard pipe and no stream is created, DIRECTION
* should then be 0. */
gpg_err_code_t
_gpgrt_make_pipe (int filedes[2], estream_t *r_fp, int direction, int nonblock)
{
if (r_fp && direction)
return do_create_pipe_and_estream (filedes, r_fp, direction, nonblock);
else
return do_create_pipe_and_estream (filedes, NULL, 0, 0);
}
/* Fork and exec the PGMNAME, see gpgrt-int.h for details. */
gpg_err_code_t
_gpgrt_spawn_process (const char *pgmname, const char *argv[],
int *except, void (*preexec)(void), unsigned int flags,
estream_t *r_infp, estream_t *r_outfp, estream_t *r_errfp,
pid_t *pid)
{
gpg_err_code_t err;
SECURITY_ATTRIBUTES sec_attr;
PROCESS_INFORMATION pi =
{
NULL, /* Returns process handle. */
0, /* Returns primary thread handle. */
0, /* Returns pid. */
0 /* Returns tid. */
};
STARTUPINFO si;
int cr_flags;
char *cmdline;
HANDLE inpipe[2] = {INVALID_HANDLE_VALUE, INVALID_HANDLE_VALUE};
HANDLE outpipe[2] = {INVALID_HANDLE_VALUE, INVALID_HANDLE_VALUE};
HANDLE errpipe[2] = {INVALID_HANDLE_VALUE, INVALID_HANDLE_VALUE};
estream_t infp = NULL;
estream_t outfp = NULL;
estream_t errfp = NULL;
HANDLE nullhd[3] = {INVALID_HANDLE_VALUE,
INVALID_HANDLE_VALUE,
INVALID_HANDLE_VALUE};
int i;
es_syshd_t syshd;
int nonblock = !!(flags & GPGRT_SPAWN_NONBLOCK);
int ret;
(void)except; /* Not yet used. */
if (r_infp)
*r_infp = NULL;
if (r_outfp)
*r_outfp = NULL;
if (r_errfp)
*r_errfp = NULL;
*pid = (pid_t)(-1); /* Always required. */
if (r_infp)
{
if (create_inheritable_pipe (inpipe, INHERIT_READ))
{
err = GPG_ERR_GENERAL;
_gpgrt_log_error (_("error creating a pipe: %s\n"),
_gpg_strerror (err));
return err;
}
syshd.type = ES_SYSHD_HANDLE;
syshd.u.handle = inpipe[1];
infp = _gpgrt_sysopen (&syshd, nonblock? "w,nonblock" : "w");
if (!infp)
{
err = _gpg_err_code_from_syserror ();
_gpgrt_log_error (_("error creating a stream for a pipe: %s\n"),
_gpg_strerror (err));
CloseHandle (inpipe[0]);
CloseHandle (inpipe[1]);
inpipe[0] = inpipe[1] = INVALID_HANDLE_VALUE;
return err;
}
}
if (r_outfp)
{
if (create_inheritable_pipe (outpipe, INHERIT_WRITE))
{
err = GPG_ERR_GENERAL;
_gpgrt_log_error (_("error creating a pipe: %s\n"),
_gpg_strerror (err));
return err;
}
syshd.type = ES_SYSHD_HANDLE;
syshd.u.handle = outpipe[0];
outfp = _gpgrt_sysopen (&syshd, nonblock? "r,nonblock" : "r");
if (!outfp)
{
err = _gpg_err_code_from_syserror ();
_gpgrt_log_error (_("error creating a stream for a pipe: %s\n"),
_gpg_strerror (err));
CloseHandle (outpipe[0]);
CloseHandle (outpipe[1]);
outpipe[0] = outpipe[1] = INVALID_HANDLE_VALUE;
if (infp)
_gpgrt_fclose (infp);
else if (inpipe[1] != INVALID_HANDLE_VALUE)
CloseHandle (inpipe[1]);
if (inpipe[0] != INVALID_HANDLE_VALUE)
CloseHandle (inpipe[0]);
return err;
}
}
if (r_errfp)
{
if (create_inheritable_pipe (errpipe, INHERIT_WRITE))
{
err = GPG_ERR_GENERAL;
_gpgrt_log_error (_("error creating a pipe: %s\n"),
_gpg_strerror (err));
return err;
}
syshd.type = ES_SYSHD_HANDLE;
syshd.u.handle = errpipe[0];
errfp = _gpgrt_sysopen (&syshd, nonblock? "r,nonblock" : "r");
if (!errfp)
{
err = _gpg_err_code_from_syserror ();
_gpgrt_log_error (_("error creating a stream for a pipe: %s\n"),
_gpg_strerror (err));
CloseHandle (errpipe[0]);
CloseHandle (errpipe[1]);
errpipe[0] = errpipe[1] = INVALID_HANDLE_VALUE;
if (outfp)
_gpgrt_fclose (outfp);
else if (outpipe[0] != INVALID_HANDLE_VALUE)
CloseHandle (outpipe[0]);
if (outpipe[1] != INVALID_HANDLE_VALUE)
CloseHandle (outpipe[1]);
if (infp)
_gpgrt_fclose (infp);
else if (inpipe[1] != INVALID_HANDLE_VALUE)
CloseHandle (inpipe[1]);
if (inpipe[0] != INVALID_HANDLE_VALUE)
CloseHandle (inpipe[0]);
return err;
}
}
/* Prepare security attributes. */
memset (&sec_attr, 0, sizeof sec_attr );
sec_attr.nLength = sizeof sec_attr;
sec_attr.bInheritHandle = FALSE;
/* Build the command line. */
err = build_w32_commandline (pgmname, argv, &cmdline);
if (err)
return err;
if (inpipe[0] == INVALID_HANDLE_VALUE)
nullhd[0] = w32_open_null (0);
if (outpipe[1] == INVALID_HANDLE_VALUE)
nullhd[1] = w32_open_null (1);
if (errpipe[1] == INVALID_HANDLE_VALUE)
nullhd[2] = w32_open_null (1);
/* Start the process. Note that we can't run the PREEXEC function
because this might change our own environment. */
(void)preexec;
memset (&si, 0, sizeof si);
si.cb = sizeof (si);
si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
si.wShowWindow = DEBUG_W32_SPAWN? SW_SHOW : SW_MINIMIZE;
si.hStdInput = inpipe[0] == INVALID_HANDLE_VALUE? nullhd[0] : inpipe[0];
si.hStdOutput = outpipe[1] == INVALID_HANDLE_VALUE? nullhd[1] : outpipe[1];
si.hStdError = errpipe[1] == INVALID_HANDLE_VALUE? nullhd[2] : errpipe[1];
cr_flags = (CREATE_DEFAULT_ERROR_MODE
| ((flags & GPGRT_SPAWN_DETACHED)? DETACHED_PROCESS : 0)
| GetPriorityClass (GetCurrentProcess ())
| CREATE_SUSPENDED);
_gpgrt_log_debug ("CreateProcess, path='%s' cmdline='%s'\n",
pgmname, cmdline);
ret = CreateProcess (pgmname, /* Program to start. */
cmdline, /* Command line arguments. */
&sec_attr, /* Process security attributes. */
&sec_attr, /* Thread security attributes. */
TRUE, /* Inherit handles. */
cr_flags, /* Creation flags. */
NULL, /* Environment. */
NULL, /* Use current drive/directory. */
&si, /* Startup information. */
&pi /* Returns process information. */
);
if (!ret)
{
_gpgrt_log_error ("CreateProcess failed: ec=%d\n", (int)GetLastError ());
xfree (cmdline);
if (infp)
_gpgrt_fclose (infp);
else if (inpipe[1] != INVALID_HANDLE_VALUE)
CloseHandle (outpipe[1]);
if (inpipe[0] != INVALID_HANDLE_VALUE)
CloseHandle (inpipe[0]);
if (outfp)
_gpgrt_fclose (outfp);
else if (outpipe[0] != INVALID_HANDLE_VALUE)
CloseHandle (outpipe[0]);
if (outpipe[1] != INVALID_HANDLE_VALUE)
CloseHandle (outpipe[1]);
if (errfp)
_gpgrt_fclose (errfp);
else if (errpipe[0] != INVALID_HANDLE_VALUE)
CloseHandle (errpipe[0]);
if (errpipe[1] != INVALID_HANDLE_VALUE)
CloseHandle (errpipe[1]);
return GPG_ERR_GENERAL;
}
xfree (cmdline);
cmdline = NULL;
/* Close the inherited handles to /dev/null. */
for (i=0; i < DIM (nullhd); i++)
if (nullhd[i] != INVALID_HANDLE_VALUE)
CloseHandle (nullhd[i]);
/* Close the inherited ends of the pipes. */
if (inpipe[0] != INVALID_HANDLE_VALUE)
CloseHandle (inpipe[0]);
if (outpipe[1] != INVALID_HANDLE_VALUE)
CloseHandle (outpipe[1]);
if (errpipe[1] != INVALID_HANDLE_VALUE)
CloseHandle (errpipe[1]);
_gpgrt_log_debug ("CreateProcess ready: hProcess=%p hThread=%p"
" dwProcessID=%d dwThreadId=%d\n",
pi.hProcess, pi.hThread,
(int) pi.dwProcessId, (int) pi.dwThreadId);
_gpgrt_log_debug (" outfp=%p errfp=%p\n", outfp, errfp);
if ((flags & GPGRT_SPAWN_RUN_ASFW))
{
/* Fixme: For unknown reasons AllowSetForegroundWindow returns
* an invalid argument error if we pass it the correct
* processID. As a workaround we use -1 (ASFW_ANY). */
if (!AllowSetForegroundWindow (ASFW_ANY /*pi.dwProcessId*/))
_gpgrt_log_info ("AllowSetForegroundWindow() failed: ec=%d\n",
(int)GetLastError ());
}
/* Process has been created suspended; resume it now. */
_gpgrt_pre_syscall ();
ResumeThread (pi.hThread);
CloseHandle (pi.hThread);
_gpgrt_post_syscall ();
if (r_infp)
*r_infp = infp;
if (r_outfp)
*r_outfp = outfp;
if (r_errfp)
*r_errfp = errfp;
*pid = handle_to_pid (pi.hProcess);
return 0;
}
/* Fork and exec the PGMNAME using FDs, see gpgrt-int.h for details. */
gpg_err_code_t
_gpgrt_spawn_process_fd (const char *pgmname, const char *argv[],
int infd, int outfd, int errfd, pid_t *pid)
{
gpg_err_code_t err;
SECURITY_ATTRIBUTES sec_attr;
PROCESS_INFORMATION pi = { NULL, 0, 0, 0 };
STARTUPINFO si;
char *cmdline;
int ret, i;
HANDLE stdhd[3];
/* Setup return values. */
*pid = (pid_t)(-1);
/* Prepare security attributes. */
memset (&sec_attr, 0, sizeof sec_attr );
sec_attr.nLength = sizeof sec_attr;
sec_attr.bInheritHandle = FALSE;
/* Build the command line. */
err = build_w32_commandline (pgmname, argv, &cmdline);
if (err)
return err;
memset (&si, 0, sizeof si);
si.cb = sizeof (si);
si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
si.wShowWindow = DEBUG_W32_SPAWN? SW_SHOW : SW_MINIMIZE;
stdhd[0] = infd == -1? w32_open_null (0) : INVALID_HANDLE_VALUE;
stdhd[1] = outfd == -1? w32_open_null (1) : INVALID_HANDLE_VALUE;
stdhd[2] = errfd == -1? w32_open_null (1) : INVALID_HANDLE_VALUE;
si.hStdInput = infd == -1? stdhd[0] : (void*)_get_osfhandle (infd);
si.hStdOutput = outfd == -1? stdhd[1] : (void*)_get_osfhandle (outfd);
si.hStdError = errfd == -1? stdhd[2] : (void*)_get_osfhandle (errfd);
_gpgrt_log_debug ("CreateProcess, path='%s' cmdline='%s'\n",
pgmname, cmdline);
ret = CreateProcess (pgmname, /* Program to start. */
cmdline, /* Command line arguments. */
&sec_attr, /* Process security attributes. */
&sec_attr, /* Thread security attributes. */
TRUE, /* Inherit handles. */
(CREATE_DEFAULT_ERROR_MODE
| GetPriorityClass (GetCurrentProcess ())
| CREATE_SUSPENDED | DETACHED_PROCESS),
NULL, /* Environment. */
NULL, /* Use current drive/directory. */
&si, /* Startup information. */
&pi /* Returns process information. */
);
if (!ret)
{
_gpgrt_log_error ("CreateProcess failed: ec=%d\n", (int)GetLastError ());
err = GPG_ERR_GENERAL;
}
else
err = 0;
xfree (cmdline);
for (i=0; i < 3; i++)
if (stdhd[i] != INVALID_HANDLE_VALUE)
CloseHandle (stdhd[i]);
if (err)
return err;
_gpgrt_log_debug ("CreateProcess ready: hProcess=%p hThread=%p"
" dwProcessID=%d dwThreadId=%d\n",
pi.hProcess, pi.hThread,
(int) pi.dwProcessId, (int) pi.dwThreadId);
/* Process has been created suspended; resume it now. */
ResumeThread (pi.hThread);
CloseHandle (pi.hThread);
*pid = handle_to_pid (pi.hProcess);
return 0;
}
/* See gpgrt-int.h for a description. */
gpg_err_code_t
_gpgrt_wait_process (const char *pgmname, pid_t pid, int hang, int *r_exitcode)
{
return _gpgrt_wait_processes (&pgmname, &pid, 1, hang, r_exitcode);
}
/* See gpgrt-int.h for a description. */
gpg_err_code_t
_gpgrt_wait_processes (const char **pgmnames, pid_t *pids, size_t count,
int hang, int *r_exitcodes)
{
gpg_err_code_t ec = 0;
size_t i;
HANDLE *procs;
int code;
procs = xtrycalloc (count, sizeof *procs);
if (procs == NULL)
return _gpg_err_code_from_syserror ();
for (i = 0; i < count; i++)
{
if (r_exitcodes)
r_exitcodes[i] = -1;
if (pids[i] == (pid_t)(-1))
return GPG_ERR_INV_VALUE;
procs[i] = fd_to_handle (pids[i]);
}
_gpgrt_pre_syscall ();
code = WaitForMultipleObjects (count, procs, TRUE, hang? INFINITE : 0);
_gpgrt_post_syscall ();
switch (code)
{
case WAIT_TIMEOUT:
ec = GPG_ERR_TIMEOUT;
goto leave;
case WAIT_FAILED:
_gpgrt_log_error (_("waiting for processes to terminate failed: ec=%d\n"),
(int)GetLastError ());
ec = GPG_ERR_GENERAL;
goto leave;
case WAIT_OBJECT_0:
for (i = 0; i < count; i++)
{
DWORD exc;
if (! GetExitCodeProcess (procs[i], &exc))
{
_gpgrt_log_error (_("error getting exit code of process %d:"
" ec=%d\n"),
(int) pids[i], (int)GetLastError ());
ec = GPG_ERR_GENERAL;
}
else if (exc)
{
if (!r_exitcodes)
_gpgrt_log_error (_("error running '%s': exit status %d\n"),
pgmnames[i], (int)exc);
else
r_exitcodes[i] = (int)exc;
ec = GPG_ERR_GENERAL;
}
else
{
if (r_exitcodes)
r_exitcodes[i] = 0;
}
}
break;
default:
_gpgrt_log_debug ("WaitForMultipleObjects returned unexpected code %d\n",
code);
ec = GPG_ERR_GENERAL;
break;
}
leave:
return ec;
}
/* See gpgrt-int.h for a description. */
gpg_err_code_t
_gpgrt_spawn_process_detached (const char *pgmname, const char *argv[],
const char *envp[] )
{
gpg_err_code_t err;
SECURITY_ATTRIBUTES sec_attr;
PROCESS_INFORMATION pi =
{
NULL, /* Returns process handle. */
0, /* Returns primary thread handle. */
0, /* Returns pid. */
0 /* Returns tid. */
};
STARTUPINFO si;
int cr_flags;
char *cmdline;
int ret;
/* We don't use ENVP. */
(void)envp;
if (access (pgmname, X_OK))
return _gpg_err_code_from_syserror ();
/* Prepare security attributes. */
memset (&sec_attr, 0, sizeof sec_attr );
sec_attr.nLength = sizeof sec_attr;
sec_attr.bInheritHandle = FALSE;
/* Build the command line. */
err = build_w32_commandline (pgmname, argv, &cmdline);
if (err)
return err;
/* Start the process. */
memset (&si, 0, sizeof si);
si.cb = sizeof (si);
si.dwFlags = STARTF_USESHOWWINDOW;
si.wShowWindow = DEBUG_W32_SPAWN? SW_SHOW : SW_MINIMIZE;
cr_flags = (CREATE_DEFAULT_ERROR_MODE
| GetPriorityClass (GetCurrentProcess ())
| CREATE_NEW_PROCESS_GROUP
| DETACHED_PROCESS);
_gpgrt_log_debug ("CreateProcess(detached), path='%s' cmdline='%s'\n",
pgmname, cmdline);
ret = CreateProcess (pgmname, /* Program to start. */
cmdline, /* Command line arguments. */
&sec_attr, /* Process security attributes. */
&sec_attr, /* Thread security attributes. */
FALSE, /* Inherit handles. */
cr_flags, /* Creation flags. */
NULL, /* Environment. */
NULL, /* Use current drive/directory. */
&si, /* Startup information. */
&pi /* Returns process information. */
);
if (!ret)
{
_gpgrt_log_error ("CreateProcess(detached) failed: ec=%d\n",
(int)GetLastError ());
xfree (cmdline);
return GPG_ERR_GENERAL;
}
xfree (cmdline);
cmdline = NULL;
_gpgrt_log_debug ("CreateProcess(detached) ready: hProcess=%p hThread=%p"
" dwProcessID=%d dwThreadId=%d\n",
pi.hProcess, pi.hThread,
(int) pi.dwProcessId, (int) pi.dwThreadId);
CloseHandle (pi.hThread);
CloseHandle (pi.hProcess);
return 0;
}
/* Kill a process; that is send an appropriate signal to the process.
gnupg_wait_process must be called to actually remove the process
from the system. An invalid PID is ignored. */
void
_gpgrt_kill_process (pid_t pid)
{
if (pid != (pid_t) INVALID_HANDLE_VALUE)
{
HANDLE process = (HANDLE) pid;
/* Arbitrary error code. */
_gpgrt_pre_syscall ();
TerminateProcess (process, 1);
_gpgrt_post_syscall ();
}
}
void
_gpgrt_release_process (pid_t pid)
{
if (pid != (pid_t)INVALID_HANDLE_VALUE)
{
HANDLE process = (HANDLE)pid;
CloseHandle (process);
}
}