mirror of
git://git.gnupg.org/gnupg.git
synced 2024-10-31 20:08:43 +01:00
363 lines
9.2 KiB
C
363 lines
9.2 KiB
C
/* openfile.c
|
|
* Copyright (C) 1998, 1999, 2000, 2001 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 <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.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 EXTSEP_S "skel"
|
|
#endif
|
|
|
|
#if defined (HAVE_DRIVE_LETTERS) || defined (__riscos__)
|
|
#define CMP_FILENAME(a,b) ascii_strcasecmp( (a), (b) )
|
|
#else
|
|
#define CMP_FILENAME(a,b) strcmp( (a), (b) )
|
|
#endif
|
|
|
|
#ifdef MKDIR_TAKES_ONE_ARG
|
|
# undef mkdir
|
|
# define mkdir(a,b) mkdir(a)
|
|
#endif
|
|
|
|
/* FIXME: Implement opt.interactive. */
|
|
|
|
/****************
|
|
* 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 */
|
|
|
|
#ifndef HAVE_DOSISH_SYSTEM
|
|
if ( !strcmp ( fname, "/dev/null" ) )
|
|
return 1; /* does not do any harm */
|
|
#endif
|
|
|
|
/* 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;
|
|
}
|
|
|
|
|
|
/****************
|
|
* Strip know extensions from iname and return a newly allocated
|
|
* filename. Return NULL if we can't do that.
|
|
*/
|
|
char *
|
|
make_outfile_name( const char *iname )
|
|
{
|
|
size_t n;
|
|
|
|
if( (!iname || (*iname=='-' && !iname[1]) ))
|
|
return m_strdup("-");
|
|
|
|
n = strlen(iname);
|
|
if( n > 4 && ( !CMP_FILENAME(iname+n-4, EXTSEP_S "gpg")
|
|
|| !CMP_FILENAME(iname+n-4, EXTSEP_S "pgp")
|
|
|| !CMP_FILENAME(iname+n-4, EXTSEP_S "sig")
|
|
|| !CMP_FILENAME(iname+n-4, EXTSEP_S "asc") ) ) {
|
|
char *buf = m_strdup( iname );
|
|
buf[n-4] = 0;
|
|
return buf;
|
|
}
|
|
else if( n > 5 && !CMP_FILENAME(iname+n-5, EXTSEP_S "sign") ) {
|
|
char *buf = m_strdup( iname );
|
|
buf[n-5] = 0;
|
|
return buf;
|
|
}
|
|
|
|
log_info(_("%s: unknown suffix\n"), iname );
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/****************
|
|
* Ask for a outputfilename and use the given one as default.
|
|
* Return NULL if no file has been given or it is not possible to
|
|
* ask the user.
|
|
*/
|
|
char *
|
|
ask_outfile_name( const char *name, size_t namelen )
|
|
{
|
|
size_t n;
|
|
const char *s;
|
|
char *prompt;
|
|
char *fname;
|
|
char *defname;
|
|
|
|
if( opt.batch )
|
|
return NULL;
|
|
|
|
s = _("Enter new filename");
|
|
|
|
n = strlen(s) + namelen + 10;
|
|
defname = name && namelen? make_printable_string( name, namelen, 0): NULL;
|
|
prompt = m_alloc(n);
|
|
if( defname )
|
|
sprintf(prompt, "%s [%s]: ", s, defname );
|
|
else
|
|
sprintf(prompt, "%s: ", s );
|
|
fname = cpr_get("openfile.askoutname", prompt );
|
|
cpr_kill_prompt();
|
|
m_free(prompt);
|
|
if( !*fname ) {
|
|
m_free( fname ); fname = NULL;
|
|
fname = defname; defname = NULL;
|
|
}
|
|
m_free(defname);
|
|
if (fname)
|
|
trim_spaces (fname);
|
|
return fname;
|
|
}
|
|
|
|
|
|
|
|
/****************
|
|
* 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.dry_run )
|
|
name = "/dev/null";
|
|
else if( opt.outfile )
|
|
name = opt.outfile;
|
|
else {
|
|
#ifdef USE_ONLY_8DOT3
|
|
/* It is quite common DOS system to have only one dot in a
|
|
* a filename So if we have something like this, we simple
|
|
* replace the suffix execpt in cases where the suffix is
|
|
* larger than 3 characters and not the same as.
|
|
* We should really map the filenames to 8.3 but this tends to
|
|
* be more complicated and is probaly a duty of the filesystem
|
|
*/
|
|
char *dot;
|
|
const char *newsfx = mode==1 ? ".asc" :
|
|
mode==2 ? ".sig" : ".gpg";
|
|
|
|
buf = m_alloc(strlen(iname)+4+1);
|
|
strcpy(buf,iname);
|
|
dot = strchr(buf, '.' );
|
|
if( dot && dot > buf && dot[1] && strlen(dot) <= 4
|
|
&& CMP_FILENAME(newsfx, dot) ) {
|
|
strcpy(dot, newsfx );
|
|
}
|
|
else if( dot && !dot[1] ) /* don't duplicate a dot */
|
|
strcpy( dot, newsfx+1 );
|
|
else
|
|
strcat( buf, newsfx );
|
|
#else
|
|
buf = m_alloc(strlen(iname)+4+1);
|
|
strcpy(stpcpy(buf,iname), mode==1 ? EXTSEP_S "asc" :
|
|
mode==2 ? EXTSEP_S "sig" : EXTSEP_S "gpg");
|
|
#endif
|
|
name = buf;
|
|
}
|
|
|
|
rc = 0;
|
|
while( !overwrite_filep (name) ) {
|
|
char *tmp = ask_outfile_name (NULL, 0);
|
|
if ( !tmp || !*tmp ) {
|
|
m_free (tmp);
|
|
rc = G10ERR_FILE_EXISTS;
|
|
break;
|
|
}
|
|
m_free (buf);
|
|
name = buf = tmp;
|
|
}
|
|
|
|
if( !rc ) {
|
|
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 );
|
|
}
|
|
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;
|
|
|
|
if( iname && !(*iname == '-' && !iname[1]) ) {
|
|
len = strlen(iname);
|
|
if( len > 4 && ( !strcmp(iname + len - 4, EXTSEP_S "sig")
|
|
|| ( len > 5 && !strcmp(iname + len - 5, EXTSEP_S "sign") )
|
|
|| !strcmp(iname + len - 4, EXTSEP_S "asc")) ) {
|
|
char *buf;
|
|
buf = m_strdup(iname);
|
|
buf[len-(buf[len-1]=='n'?5:4)] = 0 ;
|
|
a = iobuf_open( buf );
|
|
if( a && 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.
|
|
*/
|
|
static void
|
|
copy_options_file( const char *destdir )
|
|
{
|
|
const char *datadir = GNUPG_DATADIR;
|
|
char *fname;
|
|
FILE *src, *dst;
|
|
int linefeeds=0;
|
|
int c;
|
|
mode_t oldmask;
|
|
|
|
if( opt.dry_run )
|
|
return;
|
|
|
|
fname = m_alloc( strlen(datadir) + strlen(destdir) + 15 );
|
|
strcpy(stpcpy(fname, datadir), DIRSEP_S "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), DIRSEP_S "gpg" EXTSEP_S "conf" );
|
|
oldmask=umask(077);
|
|
dst = fopen( fname, "w" );
|
|
umask(oldmask);
|
|
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(_("new configuration file `%s' created\n"), fname );
|
|
m_free(fname);
|
|
}
|
|
|
|
|
|
void
|
|
try_make_homedir( const char *fname )
|
|
{
|
|
const char *defhome = GNUPG_HOMEDIR;
|
|
|
|
/* Create the directory only if the supplied directory name
|
|
* is the same as the default one. This way we avoid to create
|
|
* arbitrary directories when a non-default homedirectory is used.
|
|
* To cope with HOME, we do compare only the suffix if we see that
|
|
* the default homedir does start with a tilde.
|
|
*/
|
|
if( opt.dry_run || opt.no_homedir_creation )
|
|
return;
|
|
|
|
if ( ( *defhome == '~'
|
|
&& ( strlen(fname) >= strlen (defhome+1)
|
|
&& !strcmp(fname+strlen(fname)-strlen(defhome+1),
|
|
defhome+1 ) ))
|
|
|| ( *defhome != '~'
|
|
&& !compare_filenames( fname, defhome ) )
|
|
) {
|
|
if( mkdir( fname, S_IRUSR|S_IWUSR|S_IXUSR ) )
|
|
log_fatal( _("%s: can't create directory: %s\n"),
|
|
fname, strerror(errno) );
|
|
else if( !opt.quiet )
|
|
log_info( _("%s: directory created\n"), fname );
|
|
copy_options_file( fname );
|
|
/* log_info(_("you have to start GnuPG again, " */
|
|
/* "so it can read the new configuration file\n") ); */
|
|
/* g10_exit(1); */
|
|
}
|
|
}
|