diff options
Diffstat (limited to 'libotr/libgpg-error-1.42/src/spawn-w32.c')
| -rw-r--r-- | libotr/libgpg-error-1.42/src/spawn-w32.c | 920 |
1 files changed, 920 insertions, 0 deletions
diff --git a/libotr/libgpg-error-1.42/src/spawn-w32.c b/libotr/libgpg-error-1.42/src/spawn-w32.c new file mode 100644 index 0000000..3ede1f2 --- /dev/null +++ b/libotr/libgpg-error-1.42/src/spawn-w32.c @@ -0,0 +1,920 @@ +/* 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> +#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 + +/* For HANDLE and the internal file descriptor (fd) of this module: + * HANDLE can be represented by an intptr_t which should be true for + * all systems (HANDLE is defined as void *). Further, we assume that + * -1 denotes an invalid handle. + * + * Note that a C run-time file descriptor (the exposed one to API) is + * always represented by an int. + */ +#define fd_to_handle(a) ((HANDLE)(a)) +#define handle_to_fd(a) ((intptr_t)(a)) + +/* For pid_t and HANDLE: + + * We assume that a HANDLE can be represented by an int which should + * be true for all i386 systems. + * + * On 64-bit machine, it is no longer true, as a type, however, as + * long as the range of the value in the type HANDLE can be + * represented by an int, it works. + * + * FIXME: Breaking ABI for pid_t will be needed when the value won't + * fit within 32-bit range on 64-bit machine. + */ +#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] = pid_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; + gpg_err_code_t ec; + + /* We don't use ENVP. */ + (void)envp; + + ec = _gpgrt_access (pgmname, X_OK); + if (ec) + return ec; + + /* 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); + } +} |