mirror of
git://git.gnupg.org/gnupg.git
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206 lines
6.0 KiB
C
206 lines
6.0 KiB
C
/* init.c - Various initializations
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* Copyright (C) 2007 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#ifdef WITHOUT_NPTH /* Give the Makefile a chance to build without Pth. */
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#undef HAVE_NPTH
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#undef USE_NPTH
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#endif
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#ifdef HAVE_W32_SYSTEM
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#include <windows.h>
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#endif
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#ifdef HAVE_NPTH
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#include <npth.h>
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#endif
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#ifdef HAVE_W32CE_SYSTEM
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# include <assuan.h> /* For _assuan_w32ce_finish_pipe. */
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#endif
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#include "util.h"
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#ifdef HAVE_W32CE_SYSTEM
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static void parse_std_file_handles (int *argcp, char ***argvp);
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static void
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sleep_on_exit (void)
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{
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/* The sshd on CE swallows some of the command output. Sleeping a
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while usually helps. */
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Sleep (400);
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}
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#endif /*HAVE_W32CE_SYSTEM*/
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/* If STRING is not NULL write string to es_stdout or es_stderr. MODE
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must be 1 or 2. If STRING is NULL flush the respective stream. */
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static int
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writestring_via_estream (int mode, const char *string)
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{
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if (mode == 1 || mode == 2)
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{
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if (string)
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return es_fputs (string, mode == 1? es_stdout : es_stderr);
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else
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return es_fflush (mode == 1? es_stdout : es_stderr);
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}
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else
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return -1;
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}
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/* This function is to be used early at program startup to make sure
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that some subsystems are initialized. This is in particular
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important for W32 to initialize the sockets so that our socket
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emulation code used directly as well as in libassuan may be used.
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It should best be called before any I/O is done so that setup
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required for logging is ready. ARGCP and ARGVP are the addresses
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of the parameters given to main. This function may modify them.
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CAUTION: This might be called while running suid(root). */
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void
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init_common_subsystems (int *argcp, char ***argvp)
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{
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/* Try to auto set the character set. */
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set_native_charset (NULL);
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#ifdef HAVE_W32_SYSTEM
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/* For W32 we need to initialize the socket layer. This is because
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we use recv and send in libassuan as well as at some other
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places. If we are building with PTH we let pth_init do it. We
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can't do much on error so we ignore them. An error would anyway
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later pop up if one of the socket functions is used. */
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# ifdef HAVE_NPTH
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pth_init ();
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# else
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{
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WSADATA wsadat;
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WSAStartup (0x202, &wsadat);
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}
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# endif /*!HAVE_NPTH*/
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#endif
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#ifdef HAVE_W32CE_SYSTEM
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/* Register the sleep exit function before the estream init so that
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the sleep will be called after the estream registered atexit
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function which flushes the left open estream streams and in
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particular es_stdout. */
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atexit (sleep_on_exit);
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#endif
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/* Initialize the Estream library. */
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es_init ();
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/* Special hack for Windows CE: We extract some options from arg
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to setup the standard handles. */
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#ifdef HAVE_W32CE_SYSTEM
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parse_std_file_handles (argcp, argvp);
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#else
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(void)argcp;
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(void)argvp;
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#endif
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/* Access the standard estreams as early as possible. If we don't
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do this the original stdio streams may have been closed when
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_es_get_std_stream is first use and in turn it would connect to
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the bit bucket. */
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{
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int i;
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for (i=0; i < 3; i++)
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(void)_es_get_std_stream (i);
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}
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/* --version et al shall use estream as well. */
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argparse_register_outfnc (writestring_via_estream);
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}
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/* WindowsCE uses a very strange way of handling the standard streams.
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There is a function SetStdioPath to associate a standard stream
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with a file or a device but what we really want is to use pipes as
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standard streams. Despite that we implement pipes using a device,
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we would have some limitations on the number of open pipes due to
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the 3 character limit of device file name. Thus we don't take this
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path. Another option would be to install a file system driver with
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support for pipes; this would allow us to get rid of the device
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name length limitation. However, with GnuPG we can get away be
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redefining the standard streams and passing the handles to be used
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on the command line. This has also the advantage that it makes
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creating a process much easier and does not require the
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SetStdioPath set and restore game. The caller needs to pass the
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rendezvous ids using up to three options:
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-&S0=<rvid> -&S1=<rvid> -&S2=<rvid>
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They are all optional but they must be the first arguments on the
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command line. Parsing stops as soon as an invalid option is found.
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These rendezvous ids are then used to finish the pipe creation.*/
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#ifdef HAVE_W32CE_SYSTEM
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static void
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parse_std_file_handles (int *argcp, char ***argvp)
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{
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int argc = *argcp;
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char **argv = *argvp;
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const char *s;
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assuan_fd_t fd;
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int i;
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int fixup = 0;
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if (!argc)
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return;
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for (argc--, argv++; argc; argc--, argv++)
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{
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s = *argv;
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if (*s == '-' && s[1] == '&' && s[2] == 'S'
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&& (s[3] == '0' || s[3] == '1' || s[3] == '2')
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&& s[4] == '='
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&& (strchr ("-01234567890", s[5]) || !strcmp (s+5, "null")))
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{
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if (s[5] == 'n')
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fd = ASSUAN_INVALID_FD;
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else
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fd = _assuan_w32ce_finish_pipe (atoi (s+5), s[3] != '0');
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_es_set_std_fd (s[3] - '0', (int)fd);
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fixup++;
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}
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else
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break;
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}
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if (fixup)
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{
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argc = *argcp;
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argc -= fixup;
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*argcp = argc;
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argv = *argvp;
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for (i=1; i < argc; i++)
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argv[i] = argv[i + fixup];
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for (; i < argc + fixup; i++)
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argv[i] = NULL;
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}
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}
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#endif /*HAVE_W32CE_SYSTEM*/
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