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37df3d5f59
Having the LGPL on the common GnuPG code helps to share code between GnuPG and related projects (like GPGME and Libassuan). This is good for interoperability and to reduces bugs. * common/asshelp.c, common/asshelp.h, common/asshelp2.c, common/b64dec.c * common/b64enc.c, common/convert.c, common/dns-cert.c * common/dns-cert.h common/exechelp-posix.c, common/exechelp-w32.c * common/exechelp-w32ce.c, common/exechelp.h, common/get-passphrase.c * common/get-passphrase.h, common/gettime.c, common/gpgrlhelp.c * common/helpfile.c, common/homedir.c, common/http.c, common/http.h * common/i18n.c, common/init.c, common/init.h, common/iobuf.c * common/iobuf.h, common/localename.c, common/membuf.c, common/membuf.h * common/miscellaneous.c, common/openpgp-oid.c, common/openpgpdefs.h * common/percent.c, common/pka.c, common/pka.h, common/session-env.c * common/session-env.h, common/sexp-parse.h, common/sexputil.c * common/signal.c, common/srv.c, common/srv.h, common/ssh-utils.c * common/ssh-utils.h, common/sysutils.c, common/sysutils.h * common/tlv.c, common/tlv.h, common/ttyio.c, common/ttyio.h * common/userids.c, common/userids.h, common/xasprintf.c: Change license to LGPLv3+/GPLv2+/
228 lines
6.7 KiB
C
228 lines
6.7 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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* This file is free software; you can redistribute it and/or modify
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* it under the terms of either
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*
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* - the GNU Lesser General Public License as published by the Free
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* Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* or
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*
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* - the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* or both in parallel, as here.
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*
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* This file 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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/* The default error source of the application. This is different
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from GPG_ERR_SOURCE_DEFAULT in that it does not depend on the
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source file and thus is usable in code shared by applications. */
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gpg_err_source_t default_errsource;
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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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This function should be called only via the macro
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init_common_subsystems.
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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 (gpg_err_source_t errsource, int *argcp, char ***argvp)
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{
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/* Store the error source in a gloabl variable. */
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default_errsource = errsource;
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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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