This commit was manufactured by cvs2svn to create branch

'GNUPG-1-9-BRANCH'.

1 files changed, 389 insertions, 0 deletions

diff --git a/g10/openfile.c b/g10/openfile.c
new file mode 100644
index 000000000..6f4541e80
--- /dev/null
+++ b/g10/openfile.c
@@ -0,0 +1,389 @@
+/* openfile.c
+ * Copyright (C) 1998, 1999, 2000, 2001, 2003 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
+      if (opt.mangle_dos_filenames)
+        {
+          /* 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 );
+        }
+      if (!buf)
+#endif /* USE_ONLY_8DOT3 */
+        {
+          buf = m_alloc(strlen(iname)+4+1);
+          strcpy(stpcpy(buf,iname), mode==1 ? EXTSEP_S "asc" :
+		                   mode==2 ? EXTSEP_S "sig" : EXTSEP_S "gpg");
+        }
+      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, progress_filter_context_t *pfx )
+{
+    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 );
+	    if (a && pfx)
+	      handle_progress (pfx, a, 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;
+    int esc = 0;
+    int any_option = 0;
+
+    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 );
+            if (c== '\n')
+                esc = 1;
+            else if (esc == 1) {
+                if (c == ' ' || c == '\t')
+                    ;
+                else if (c == '#')
+                    esc = 2;
+                else 
+                    any_option = 1;
+            }
+        }
+    }
+    fclose( dst );
+    fclose( src );
+    log_info(_("new configuration file `%s' created\n"), fname );
+    if (any_option)
+        log_info (_("WARNING: options in `%s'"
+                    " are not yet active during this run\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); */
+    }
+}