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gpgwrap.c
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/* gpgwrap.c - Wrapper to call gpg udner Windows.
* Copyright (C) 2007 g10 Code GmbH
*
* This file is part of Gpg4win.
*
* Gpg4win is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Gpg4win 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/* The operation mode of this wrapper can be controlled by the
GPGWRAP_VARIANT macro. The following variants are defined:
0 = Standard.
2 = Also insert a "2" right before the .exe.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <process.h>
#include <windows.h>
#if GPGWRAP_VARIANT == 2
# define PGM_SUFFIX "-2"
#else
# define PGM_SUFFIX ""
#endif
/* Return a copy of ARGV, but with proper quoting. To release the
copy, you have to free argv_quoted[0] and argv_quoted. */
static char **
build_commandline (const char * const *argv)
{
int i;
int j;
int n = 0;
char *buf;
char *p;
char **argv_quoted;
/* We have to quote some things because under Windows the program
parses the commandline and does some unquoting. We enclose the
whole argument in double-quotes, and escape literal double-quotes
as well as backslashes with a backslash. We end up with a
trailing space at the end of the line, but that is harmless. */
for (i = 0; argv[i]; i++)
{
p = (char *) argv[i];
/* The leading double-quote. */
n++;
while (*p)
{
/* An extra one for each literal that must be escaped. */
if (*p == '\\' || *p == '"')
n++;
n++;
p++;
}
/* The trailing double-quote and the delimiter. */
n += 2;
}
/* And a trailing zero. */
n++;
/* Allocate a new vector. */
argv_quoted = malloc (sizeof (char *) * (i + 1));
if (!argv_quoted)
return NULL;
buf = p = malloc (n);
if (!buf)
{
free (argv_quoted);
return NULL;
}
for (i = 0; argv[i]; i++)
{
const char *argvp = argv[i];
argv_quoted[i] = p;
*(p++) = '"';
while (*argvp)
{
if (*argvp == '\\' || *argvp == '"')
*(p++) = '\\';
*(p++) = *(argvp++);
}
*(p++) = '"';
*(p++) = 0;
}
*(p++) = 0;
argv_quoted[i] = NULL;
return argv_quoted;
}
int
main (int argc, const char * const *argv)
{
int rc;
char pgm[MAX_PATH+100];
char *p, *p0;
char **argv_quoted;
/* Note: We decrement by one to allow inserting one character. */
if (!GetModuleFileNameA (NULL, pgm, sizeof (pgm) - 1 - 1))
{
fprintf (stderr, "gpgwrap: error getting my own name: rc=%d\n",
GetLastError());
return 2;
}
/* Remove one directory part of the file name. */
p = strrchr (pgm, '\\');
if (!p)
goto leave;
*p = 0;
p0 = strrchr (pgm, '\\');
*p = '\\';
if (!p0)
goto leave;
while (*p)
*p0++ = *p++;
*p0 = 0;
#if GPGWRAP_VARIANT == 2
p = strrchr (pgm, '.');
if (p)
{
memmove (p+1, p, strlen (p)+1);
*p = '2';
}
#endif /* GPGWRAP_VARIANT == 2 */
/* Hack to output our own version along with the real file name
before the actual, we require that the --version option is given
twice. */
if (argc > 2
&& !strcmp(argv[1], "--version")
&& !strcmp(argv[2], "--version"))
{
fputs ("gpgwrap" PGM_SUFFIX " (Gpg4win) " PACKAGE_VERSION " ;", stdout);
fputs (pgm, stdout);
fputc ('\n', stdout);
fflush (stdout);
}
argv_quoted = build_commandline (argv);
if (!argv_quoted)
goto leave;
/* Using execv does not replace the existing program image, but
spawns a new one and daemonizes it, confusing the command line
interpreter. So we have to use spawnv. */
rc = _spawnv (_P_WAIT, pgm, (const char **) argv_quoted);
if (rc < 0)
{
fprintf (stderr, "gpgwrap: executing `%s' failed: %s\n",
pgm, strerror (errno));
return 2;
}
return rc;
leave:
fprintf (stderr, "gpgwrap: internal error parsing my own name `%s'\n",
pgm);
return 2;
}

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text/x-c
Expires
Sat, May 10, 8:26 AM (1 d, 6 h)
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Storage Format
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Storage Handle
5b/dc/04b4e19607ea0177799f4adc3d7d

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