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openfile.c
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/* openfile.c
* Copyright (C) 1998 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG 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.
*
* GnuPG 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <unistd.h>
#include "util.h"
#include "memory.h"
#include "ttyio.h"
#include "options.h"
#include "main.h"
#include "status.h"
#include "i18n.h"
#ifdef USE_ONLY_8DOT3
#define SKELEXT ".skl"
#else
#define SKELEXT ".skel"
#endif
/****************
* Check whether FNAME exists and ask if it's okay to overwrite an
* existing one.
* Returns: True: it's okay to overwrite or the file does not exist
* False: Do not overwrite
*/
int
overwrite_filep( const char *fname )
{
if( !fname || (*fname == '-' && !fname[1]) )
return 1; /* writing to stdout is always okay */
if( access( fname, F_OK ) )
return 1; /* does not exist */
/* fixme: add some backup stuff in case of overwrite */
if( opt.answer_yes )
return 1;
if( opt.answer_no || opt.batch )
return 0; /* do not overwrite */
tty_printf(_("File `%s' exists. "), fname);
if( cpr_get_answer_is_yes("openfile.overwrite.okay",
_("Overwrite (y/N)? ")) )
return 1;
return 0;
}
/****************
* Make an output filename for the inputfile INAME.
* Returns an IOBUF and an errorcode
* Mode 0 = use ".gpg"
* 1 = use ".asc"
* 2 = use ".sig"
*/
int
open_outfile( const char *iname, int mode, IOBUF *a )
{
int rc = 0;
*a = NULL;
if( (!iname || (*iname=='-' && !iname[1])) && !opt.outfile ) {
if( !(*a = iobuf_create(NULL)) ) {
log_error(_("%s: can't open: %s\n"), "[stdout]", strerror(errno) );
rc = G10ERR_CREATE_FILE;
}
else if( opt.verbose )
log_info(_("writing to stdout\n"));
}
else {
char *buf=NULL;
const char *name;
if( opt.outfile )
name = opt.outfile;
else {
#ifdef USE_ONLY_8DOT3
#error please implement this
#endif
buf = m_alloc(strlen(iname)+4+1);
strcpy(stpcpy(buf,iname), mode==1 ? ".asc" :
mode==2 ? ".sig" : ".gpg");
name = buf;
}
if( overwrite_filep( name ) ) {
if( !(*a = iobuf_create( name )) ) {
log_error(_("%s: can't create: %s\n"), name, strerror(errno) );
rc = G10ERR_CREATE_FILE;
}
else if( opt.verbose )
log_info(_("writing to `%s'\n"), name );
}
else
rc = G10ERR_FILE_EXISTS;
m_free(buf);
}
return rc;
}
/****************
* Try to open a file without the extension ".sig" or ".asc"
* Return NULL if such a file is not available.
*/
IOBUF
open_sigfile( const char *iname )
{
IOBUF a = NULL;
size_t len;
#ifdef USE_ONLY_8DOT3
#error please implement this
#endif
if( iname && !(*iname == '-' && !iname[1]) ) {
len = strlen(iname);
if( len > 4 && ( !strcmp(iname + len - 4, ".sig")
|| !strcmp(iname + len - 4, ".asc")) ) {
char *buf;
buf = m_strdup(iname);
buf[len-4] = 0 ;
a = iobuf_open( buf );
if( opt.verbose )
log_info(_("assuming signed data in `%s'\n"), buf );
m_free(buf);
}
}
return a;
}
/****************
* Copy the option file skeleton to the given directory.
*/
void
copy_options_file( const char *destdir )
{
const char *datadir = GNUPG_DATADIR;
char *fname;
FILE *src, *dst;
int linefeeds=0;
int c;
fname = m_alloc( strlen(datadir) + strlen(destdir) + 15 );
strcpy(stpcpy(fname, datadir), "/options" SKELEXT );
src = fopen( fname, "r" );
if( !src ) {
log_error(_("%s: can't open: %s\n"), fname, strerror(errno) );
m_free(fname);
return;
}
strcpy(stpcpy(fname, destdir), "/options" );
dst = fopen( fname, "w" );
if( !dst ) {
log_error(_("%s: can't create: %s\n"), fname, strerror(errno) );
fclose( src );
m_free(fname);
return;
}
while( (c=getc(src)) != EOF ) {
if( linefeeds < 3 ) {
if( c == '\n' )
linefeeds++;
}
else
putc( c, dst );
}
fclose( dst );
fclose( src );
log_info(_("%s: new options file created\n"), fname );
m_free(fname);
}

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text/x-c
Expires
Thu, Jul 17, 12:33 AM (1 d, 12 s)
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Storage Format
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Storage Handle
31/de/4dd22b8fbe6cc087b9a0077e4a82

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